CN108327974B

CN108327974B - Packaging mechanism for tea packaging machine

Info

Publication number: CN108327974B
Application number: CN201810128146.2A
Authority: CN
Inventors: 张志坚; 廖晓峰
Original assignee: Anxi Qiansheng Automation Equipment Co ltd
Current assignee: Anxi Qiansheng Automation Equipment Co ltd
Priority date: 2018-02-08
Filing date: 2018-02-08
Publication date: 2024-02-02
Anticipated expiration: 2038-02-08
Also published as: CN108327974A

Abstract

The invention discloses a packaging mechanism for a tea packaging machine, which comprises a fixed die holder, a movable die holder opposite to the fixed die holder, an upper heat sealing mechanism for performing heat sealing on a tea packaging bag, an upper shaping mechanism for providing lower pressure for the tea packaging bag and a lower shaping mechanism for providing upper pressure for the tea packaging bag, wherein vacuum chambers with vacuum air holes are concavely arranged on the fixed die holder and the movable die holder, the upper heat sealing mechanism comprises a fixed heating strip and a movable clamping strip, the upper shaping mechanism comprises a first shaping block and a second shaping block, the first shaping block and the second shaping block can synchronously move downwards, the lower shaping mechanism is provided with a left plate, a right plate and a shaping chamber, the lower shaping mechanism is positioned below the upper shaping mechanism and between the fixed die holder and the movable die holder, and a pushing mechanism for pushing the tea packaging bag is fixedly arranged on the fixed die holder. Compared with the prior art, the multifunctional tea packaging machine can package green tea and black tea, has various packaging functions, is dual-purpose, and greatly saves the production cost and the mechanical occupation space of tea manufacturers.

Description

Packaging mechanism for tea packaging machine

Technical Field

The invention relates to the field of tea packaging and bagging, in particular to a packaging mechanism for a tea packaging machine.

Background

As is known, tea leaves are generally packaged by small packaging bags, most of traditional packaging modes adopt workers for packaging, the manual packaging is time-consuming and labor-consuming, the working efficiency is low, in recent years, there has been a tea packaging machine for automatically packaging tea leaves, namely, after tea leaves are filled into a packaging bag, the tea packaging machine vacuumizes the packaging bag, and after vacuumization, the bag opening of the packaging bag is heat-sealed. However, the tea packaging machine is only suitable for packaging green tea, cannot be suitable for packaging black tea, has single function, and is characterized in that the packaging bag needs to be subjected to plastic packaging due to the packaging of the black tea, so that the tea packaging machine for plastic packaging of the black tea appears on the market, and the tea packaging machine for packaging the black tea cannot be suitable for packaging the green tea due to the fact that the tea packaging machine does not have a vacuumizing structure; thus, for tea manufacturers, two types of tea packing machines need to be added in the factory, one is a packing machine for green tea and the other is a packing machine for black tea, which increases the cost of the tea manufacturer and occupies the area of the manufacturer; still further, the existing black tea packaging is generally characterized in that when the existing black tea packaging is packaged in a plastic manner, the existing black tea packaging is firstly subjected to unpacking, then sealed, directly subjected to pull-down on the bag through the pull-down mechanism after sealing, pressed on tea leaves in the bag, and then pushed upwards by the push-up mechanism, so that only two sides, upper and lower sides in the width direction of the tea packaging bag are extruded and shaped during plastic, but two sides in the thickness direction of the tea packaging bag cannot be shaped, so that the two sides in the thickness direction of the shaped tea packaging bag are concave and folded at times, the shaped tea packaging bag cannot be straight and smooth, the packaging effect is poor, and the tea packaging bag is shaped only by the intermittent push-up of the push-up mechanism for a plurality of times during plastic, and the plastic is troublesome.

In view of the above, the present inventors have conducted intensive studies on the above problems, and have produced the present invention.

Disclosure of Invention

The invention aims to provide a packaging mechanism for a tea packaging machine, which is applicable to packaging of green tea and black tea, has various packaging functions, good and attractive packaging effect and is formed by one-step packaging.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the packaging mechanism for the tea packaging machine comprises a fixed die holder, a movable die holder, an upper heat sealing mechanism, an upper shaping mechanism and a lower shaping mechanism, wherein,

the fixed die holder is fixed on the tea packaging machine, the movable die holder is arranged opposite to the fixed die holder in a left-right manner in a mode of being capable of moving and translating relative die to the fixed die holder, and the movable die holder is provided with a die assembly driving device for driving the movable die holder; the method comprises the steps that the opposite surface of a fixed die holder, which is opposite to a movable die holder, is taken as a die closing surface, a first vacuum cavity is concavely arranged on the die closing surface of the fixed die holder, a second vacuum cavity matched with the first vacuum cavity is concavely arranged on the die closing surface of the movable die holder, the first vacuum cavity and the second vacuum cavity enclose a sealed cavity in which an upper heat sealing mechanism, an upper shaping mechanism and a lower shaping mechanism are contained when the fixed die holder is attached to the movable die holder in a die closing manner, and vacuum air holes which are communicated with the sealed cavity and respectively vacuumize the upper shaping mechanism before the upper heat sealing mechanism works and the lower shaping mechanism after the upper heat sealing mechanism works and keep the upper shaping mechanism and the lower shaping mechanism in a working state after the fixed die holder and the movable die holder are attached to each other are formed in the side wall of the fixed die holder and/or the side wall of the movable die holder;

The upper heat sealing mechanism comprises a fixed heating strip and a movable clamping strip which can be oppositely attached to the fixed heating strip left and right, the fixed heating strip is positioned in a first vacuum chamber, a heating surface of the fixed heating strip faces the movable clamping strip, the movable clamping strip is positioned in a second vacuum chamber in a mode of being movably moved out of the second vacuum chamber in a horizontally-movable mode, and an upper horizontally-moving driving device for driving the movable clamping strip is arranged on the movable die holder;

the upper shaping mechanism comprises a first shaping block and a second shaping block, the first shaping block and the second shaping block are synchronously connected in a lifting and moving manner, the first shaping block is positioned in the first vacuum cavity and positioned below the fixed heating strip, the second shaping block is positioned in the second vacuum cavity and positioned below the movable clamping strip, and a first lifting driving device for driving the first shaping block to move up and down is arranged on the fixed die holder;

the upper shaping mechanism is arranged below the upper shaping mechanism, is arranged between the fixed die holder and the movable die holder, falls into the range of the first vacuum chamber and the second vacuum chamber, the top surface of the upper shaping mechanism is provided with a shaping chamber which is formed by a left side plate and a right side plate and is used for the tea packaging bag to fall into, the upper shaping mechanism is arranged on the movable die holder in an up-down lifting manner, the movable die holder is provided with a second lifting driving device for driving the upper shaping mechanism to lift up and down, the upper shaping mechanism and the movable die holder are matched together in a relative left-right sliding manner, and a restoring mechanism for the upper shaping mechanism to horizontally move back is arranged between the upper shaping mechanism and the movable die holder;

The front side or the rear side of the fixed die holder is fixedly provided with a push-out mechanism, the push-out end of which is opposite to the shaping cavity, and the push-out mechanism can push out the tea packaging bags in the shaping cavity out of the packaging mechanism.

The fixed die holder and the movable die holder are square blocks which are vertically arranged, the fixed die holder is arranged on the left side, a through hole which is communicated into the first vacuum chamber from outside to inside is formed in the front side wall of the fixed die holder, the through hole is a vacuum air hole, the movable die holder is arranged on the right side, the push-out mechanism is arranged on the rear side, the right side of the movable die holder is provided with a mounting block which is fixedly arranged with a tea packing machine base lock, the mounting block is correspondingly vertically arranged square blocks, guide connecting rods which are respectively fixedly arranged on the front side and the rear side of the upper end and the lower end of the mounting block and are used for connecting the movable die holder and the fixed die holder in series, the movable die holder is movably matched with the guide connecting rods, the left side rear end of the mounting block is convexly provided with a clamping block, the right side of the movable die holder is provided with a clamping hole which is used for clamping the clamping block to be embedded in, the driving cylinder is arranged horizontally along the left and right directions, the free end of the driving cylinder is connected with the middle part of the right side of the movable die holder, and the movable die holder is fixedly connected with the tea packing machine base lock.

And sealing rubber strips which are circumferentially arranged along the circumferential direction of the second vacuum chamber are adhered to the left side surface of the movable die holder outside the part of the second vacuum chamber.

The right side face of the fixed heating strip is fixedly provided with a heating sheet, the heating sheet is flush with the die assembly face of the fixed die holder, and the left side face of the movable clamping strip is fixedly provided with a silica gel strip which is matched with the left side face of the movable clamping strip.

The pushing mechanism comprises a mounting plate and a pushing cylinder, wherein the mounting plate extends along the left and right directions of the fixed die holder, the left end of the mounting plate is matched with the rear side wall of the fixed die holder in a matching and locking mode, the right end of the mounting plate extends towards the direction of the movable die holder and is positioned outside the fixed die holder, the pushing cylinder is horizontally arranged along the front and rear directions of the fixed die holder, the cylinder body of the pushing cylinder is fixed on the rear side surface of the mounting plate, the free end part of the piston rod of the pushing cylinder is arranged forward, and a penetrating hole for the piston rod of the pushing cylinder to penetrate is formed in the mounting plate.

The lower shaping mechanism is provided with an upper bearing block, the left side plate and the right side plate, a bar-shaped guide rail extending along the up-down direction of the movable die holder is locked on the right cavity wall of the second vacuum chamber, a sliding block sliding up and down along the bar-shaped guide rail is arranged on the bar-shaped guide rail in a sliding manner, a lower mounting bar extending out of the second vacuum chamber leftwards is fixedly arranged on the left side of the sliding block, the second lifting driving device is a lower lifting cylinder, the cylinder body of the lower lifting cylinder is fixedly arranged on the lower bottom surface of the movable die holder, and the free end part of a piston rod of the lower lifting cylinder tightly extends into the second vacuum chamber and is fixedly connected with the right end of the lower mounting bar; the upper bearing block is horizontally arranged at the left end of the lower mounting bar, the lower bottom surface of the upper bearing block is provided with a lower sliding block sleeved outside the strip-shaped guide sliding rail and sliding along the strip-shaped guide sliding rail, the left side plate and the right side plate are respectively correspondingly locked on the left side and the right side of the top surface of the upper bearing block, the left side of the lower bottom surface of the upper bearing block is provided with a limiting wheel arranged behind the lower mounting bar through a mounting piece, the limiting wheel is vertically arranged, the wheel center axis of the limiting wheel extends along the front-rear direction of the upper bearing block, the left side of the limiting wheel is positioned outside the left side surface of the upper bearing block, the first vacuum chamber is internally provided with a limiting block arranged in a protruding mode relative to the limiting wheel, and the distance between the limiting wheel and the limiting block is equal to the distance between the center point of the shaping chamber and the right side surface of the fixed die holder.

The lower end of the left side plate is matched with the left side surface of the upper bearing block and locked together, the upper end part of the left side plate extends upwards to form a left inclined plate inclined leftwards, the right side wall of the lower end part of the right side plate extends rightwards to form a mounting piece matched with the upper bearing block in a superposition manner and locked together, the upper end part of the right side plate extends upwards to form a right inclined plate inclined rightwards, and the left inclined plate and the right inclined plate form a horn channel which is gradually reduced from top to bottom.

The restoring mechanism is a spring horizontally arranged along the left-right direction of the upper bearing block, the left end of the spring is fixed on the right side surface of the upper bearing block and is positioned in front of the lower mounting strip, and the right end of the spring is fixed on the left side surface of the sliding block.

The first shaping block and the second shaping block are bar-shaped blocks extending along the front-back direction, the first shaping block and the second shaping block are connected in series through a connecting rod, the connecting rod is positioned outside the upper part of the rear side of the shaping cavity, the first shaping block is provided with a left side plate, a right pressing plate opposite to the left side plate and an upper top plate positioned on the left side plate and the right pressing plate, the right side surface of the right pressing plate is flush with the right side surface of the fixed die holder, the second shaping block is provided with a left pressing plate, the right side plate opposite to the left pressing plate and the upper top plate positioned on the left pressing plate and the right side plate, the left side surface of the left pressing plate is flush with the left side surface of the movable die holder, a left bar-shaped guide rail extending along the upper-lower direction of the fixed die holder is locked on the left cavity wall of the first vacuum cavity, the left side face of the left side plate is fixedly provided with a left sliding block which is sleeved outside the left strip-shaped guide rail and slides up and down along the left strip-shaped guide rail, the first lifting driving device is a first lifting cylinder, the cylinder body of the first lifting cylinder is fixed outside the lower bottom face of the fixed die holder, the free end part of the piston rod of the first lifting cylinder is tightly matched with the lower bottom face of the fixed die holder to the first vacuum chamber and fixedly connected with the left sliding block, the right cavity wall of the second vacuum chamber is fixedly provided with a right strip-shaped guide rail which extends up and down along the movable die holder, and the right side face of the right side plate is fixedly provided with a right sliding block which is sleeved outside the right strip-shaped guide rail and slides up and down along the right strip-shaped guide rail.

The first vacuum chamber is positioned above the first shaping block, a left isolation block for isolating the first vacuum chamber from an upper chamber and a lower chamber is arranged on the left side plate of the fixed die holder, an extending mounting hole which penetrates through the upper chamber is formed in the left side plate of the fixed die holder, the fixed heating strip is a strip-shaped plate extending along the front-back direction of the fixed die holder, the fixed heating strip is tightly matched and embedded in the upper chamber through the extending mounting hole, and a mounting block which is mutually stuck and locked with the left side surface of the fixed die holder is arranged on the left side surface of the fixed heating strip; the second vacuum chamber is located on the second shaping block, a right isolation block for isolating the second vacuum chamber from the upper chamber and the lower chamber is arranged above the second shaping block, the movable clamping strip is a strip-shaped plate extending along the front-back direction of the movable die holder, the movable clamping strip is movably embedded in the upper chamber of the second vacuum chamber, the upper translation driving device is a translation cylinder, the translation cylinder is horizontally arranged outside the right side surface of the movable die holder along the left-right direction, a cylinder body of the translation cylinder is locked on the right side surface of the movable die holder, and the free end part of a piston rod of the translation cylinder tightly stretches into the upper chamber of the second vacuum chamber to be fixedly connected with the movable clamping strip.

After the technical scheme is adopted, the packaging mechanism for the tea packaging machine is arranged on the tea packaging machine, and the shaping cavity of the packaging mechanism is received below the tea falling opening of the tea packaging machine. When in operation, the second lifting driving device drives the lower shaping mechanism to move upwards, the lower shaping mechanism moves upwards to the upper shaping mechanism, the tea packaging bag packed with tea leaves directly falls into the shaping cavity, the lower shaping mechanism moves downwards, the mold closing driving device drives the movable mold seat to translate towards the direction of the fixed mold seat and mold the fixed mold seat, the first vacuum cavity and the second vacuum cavity form a closed cavity, when the mold closing is carried out, because the lower shaping structure is positioned outside the movable mold seat, a part of the lower shaping structure is positioned in the first vacuum cavity when the movable mold seat translates, meanwhile, the lower shaping structure is movably matched with the movable mold seat in a left-right translation way, the other part of the lower shaping structure is positioned in the second vacuum cavity when the lower shaping structure contacts with the first vacuum cavity and moves continuously, the restoring mechanism is compressed, the upper part of the tea packaging bag in the shaping cavity is clamped between the fixed heating strip and the movable clamping strip and between the first shaping block and the second shaping block by the die clamping of the movable die holder and the fixed die holder, after the die clamping, the outside vacuumizing system is utilized to suck the air in the tea packaging bag, at the moment, if the tea in the tea packaging bag is green tea, the vacuum quantity flowing into the vacuumizing system is increased to suck the air in the tea packaging bag, then the upper translation driving device drives the movable clamping strip to translate towards the fixed heating strip, the movable clamping strip is in compression fit with the fixed heating strip, the upper part of the tea packaging bag is sealed by hot pressing, the movable die holder translates towards the direction deviating from the fixed die holder after the sealing, the movable die holder is separated from the fixed die holder, the restoring mechanism pushes the lower shaping mechanism to restore to the original position, namely the lower shaping mechanism is positioned between the movable die holder and the fixed die holder, at the moment, the pushing mechanism is started to pack and push out the packed tea packaging bags, so that the green tea can be packed; if the tea in the tea packaging bag is black tea, the vacuum flowing into the vacuum air hole is smaller, the tea packaging bag is vacuumized to ensure that the air quantity in the tea packaging bag is smaller, then the movable clamping strip is horizontally moved to be in compression fit with the fixed heating strip, the tea packaging bag is sealed by hot pressing, the vacuum air hole is ventilated again after sealing, the sealed cavity is vacuumized at the moment, the sealed tea packaging bag is larger than the cavity in the sealed cavity due to the internal pressure, the tea packaging bag is inflated, the tea foam on the inner side wall of the tea packaging bag is free to fall under the pressure difference at the moment, so that the tea residue is not left at the position of the tea packaging bag above the tea area, then the sealed cavity is vacuumized, the tea packaging bag is restored to the original shape, and then the first lifting driving device is started, the first shaping block and the second shaping block are clamped at the upper part of the tea packaging bag, and horizontally move downwards at the position below the heat seal, the first shaping block and the second shaping block can clamp and straighten the tea packaging bag in a tea-free area downwards, when the first shaping block and the second shaping block move downwards to the position above the tea in the tea packaging bag, the upper shaping mechanism cannot move upwards, the upper shaping mechanism has lower pressure pressing on the tea packaging bag, at the moment, the second lifting driving device is started, the lower shaping mechanism moves upwards, the upper shaping mechanism cannot move upwards due to the limitation of the upper shaping mechanism, at the moment, the lower shaping mechanism forms upward upper pressure on the tea packaging bag, the tea packaging bag is shaped into a square structure by utilizing the relative force of the lower pressure and the upper pressure and the relative limiting function of the left side plate and the right side plate, the tea packaging bag is shaped into the square structure for the first time, after primary shaping, the lower shaping mechanism and the upper shaping mechanism are kept motionless, the sealed cavity is vacuumized again, at this time, the tea packaging bag is subjected to the influence of vacuum, so that the two sides of the tea packaging bag in the thickness direction can be expanded and shaped, the two sides of the tea packaging bag in the thickness direction, the two sides of the tea packaging bag in the width direction, the upper side and the lower side can be shaped, the shaping effect is good, the tea packaged by the tea packaging bag can translate towards the two sides of the tea packaging bag in the thickness direction of the tea packaging bag, the tea packaging bag is in a full state, the packaging effect is further improved, secondary shaping is achieved, the sealed cavity is vacuumized after secondary shaping, the upper shaping mechanism is reset upwards, the movable die holder and the fixed die holder are separated, and the pushing mechanism is started to push out the packaged tea packaging bag, so that the packaging of black tea can be completed. Compared with the prior art, the packaging machine accords with the packaging of the green tea packaging form and the packaging of the black tea packaging form, realizes the general packaging of the green tea and the black tea, has various packaging functions, is multipurpose, does not need to be provided with two tea packaging machines with different packaging forms in a tea manufacturer factory building, greatly saves the production cost and the mechanical occupation space of tea manufacturers, has the advantages of simple integral structure, compact layout, small size, convenient disassembly and assembly, easy maintenance, simple operation and the like, can extract a small amount of air in the tea packaging bag during the black tea packaging, and ensures that the air in the tea packaging bag is less outside the effect of not influencing the black tea shaping packaging, so that the fresh-keeping effect of the tea is better, and the secondary shaping is adopted to ensure that the packaging effect is good and attractive, and the tea foam is not remained at the position of the inner wall of the packaging bag above the tea area.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the present invention another perspective view;

FIG. 3 is a further perspective view of the present invention;

FIG. 4 is a perspective view of a movable die holder in the present invention;

FIG. 5 is a perspective view of a stationary die holder of the present invention;

FIG. 6 is a schematic diagram of the combination of the upper heat seal mechanism, upper shaping mechanism and lower shaping mechanism (omitting springs) of the present invention;

fig. 7 is a schematic view of another combination of an upper heat seal mechanism, an upper shaping mechanism and a lower shaping mechanism in accordance with the present invention.

Detailed Description

For further explanation of the technical scheme of the present invention, the following is described in detail with reference to the accompanying drawings.

The packing mechanism for the tea packing machine of the present invention, as shown in fig. 1 to 7, comprises a fixed die holder 1, a movable die holder 2, an upper heat-sealing mechanism, an upper shaping mechanism and a lower shaping mechanism, wherein,

the fixed die holder 1 is fixed on the tea packaging machine, the movable die holder 2 is arranged opposite to the fixed die holder in a left-right manner in a mode of movably translating the corresponding die in the direction of the fixed die holder, the fixed die holder 1 is positioned at the left side, the movable die holder 2 is positioned at the right side, and a die assembly driving device for driving the movable die holder 2 to translate left and right is arranged on the movable die holder 2; preferably, the fixed die holder 1 and the movable die holder 2 are square blocks which are vertically arranged, the right side of the movable die holder 2 is provided with a mounting block 3 which is used for being fixedly mounted with a tea packing machine base, the mounting block 3 is correspondingly square blocks which are vertically arranged, the front side and the rear side of the upper end and the lower end of the mounting block 3 are respectively fixedly provided with a guide connecting rod (not shown in the figure) which connects the movable die holder and the fixed die holder together in series, namely, the front side and the rear side of the upper end and the lower end of the mounting block 3, the fixed die holder 1 and the movable die holder 2 are respectively provided with a through hole which extends left and right, the right end part of the guide connecting rod is sleeved and fixed in the through hole of the mounting block 3, the left end part of the guide connecting rod movably passes through the through hole of the movable die holder 2 to the through hole of the fixed die holder 1 and is in locking fit with the fixed die holder 1, the die closing driving device is a driving cylinder (not shown in the figure), the free end part of a piston rod of the driving cylinder is horizontally arranged along the left and right direction, and the middle part of the right side of the movable die holder 2 is fixedly connected with the front side of the movable die holder 2, namely, the right end part of the driving cylinder is provided with a through hole 31 which is provided for driving the tea packing machine base 3; when the movable die holder 2 is applied, the piston rod of the driving cylinder stretches and contracts to realize the translation of the movable die holder 2, and the guiding connecting rod is matched with the movable die holder 2 in a movable sleeve manner to play a guiding role in the translation of the movable die holder 2. In addition, a clamping block (not shown in the figure) may be convexly arranged at the rear end of the left side surface of the mounting block 3, a clamping hole 21 for clamping and embedding the clamping block is formed in the right side surface of the movable die holder 2, and the movable die holder 2 can be moved to the right for resetting by utilizing the matching of the clamping block and the clamping hole 21 to play a role of guiding and positioning, so that the die clamping effect of the movable die holder and the fixed die holder is good.

The right side surface of the fixed die holder 1 is concavely provided with a first vacuum chamber 100, the left side surface of the movable die holder 2 is correspondingly concavely provided with a second vacuum chamber 200 matched with the first vacuum chamber 100, the first vacuum chamber 100 and the second vacuum chamber 200 are square chambers which are arranged in a relatively matched mode, the first vacuum chamber and the second vacuum chamber form a sealed chamber in which an upper heat sealing mechanism, an upper shaping mechanism and a lower shaping mechanism are accommodated when the fixed die holder 1 is attached to the movable die holder 2, the front side wall of the fixed die holder 1 is provided with a vacuum air hole 11 which is communicated with the sealed chamber from outside to inside, and the vacuum air hole 11 is used for respectively vacuumizing the sealed chamber before the upper heat sealing mechanism works and after the upper shaping mechanism works and when the lower shaping mechanism works after the upper shaping mechanism works, and the upper shaping mechanism and the lower shaping mechanism can be kept in a working state, and the vacuum cavity can be vacuumized and broken by the vacuum air hole 11. In the invention, the vacuum air holes can also be arranged on the front side wall or the rear side wall of the movable die holder 2, or the movable die holder 2 and the fixed die holder 1 are both provided with the vacuum air holes.

The upper heat sealing mechanism comprises a fixed heating strip 41 and a movable clamping strip 42 which can be oppositely attached to the fixed heating strip 41 left and right, the fixed heating strip 41 is fixedly arranged in the first vacuum chamber 100, the movable clamping strip 42 is arranged in the second vacuum chamber 200 in a mode of being movably horizontally moved out of the second vacuum chamber 200, and an upper horizontal movement driving device for driving the movable clamping strip 42 is arranged on the movable die holder 2; preferably, it is: the upper part in the first vacuum chamber 100 is provided with a left isolation block 12 for isolating the first vacuum chamber 100 from an upper chamber and a lower chamber, a left side plate of the fixed die holder 1 is provided with an extending mounting hole 13 which penetrates through the upper chamber, the fixed heating strip 41 is a strip-shaped plate extending along the front-back direction of the fixed die holder 1, the fixed heating strip 41 is embedded in the upper chamber through the extending mounting hole 13 in a left-to-right tight fit manner and is stacked on the left isolation block 12, the left side surface of the fixed heating strip 41 is provided with a mounting block 411 which is attached to the left side surface of the fixed die holder 1 and locked together, the disassembly and the fixed mounting of the fixed heating strip 41 can be realized by utilizing the mounting block 411 and the extending mounting hole 13, the right side surface of the fixed heating strip 41 is fixedly provided with a heating sheet, and the heating sheet is flush with the right side surface of the fixed die holder 1.

The upper part in the second vacuum chamber 200 is provided with a right isolation block 22 for isolating the second vacuum chamber 200 from an upper chamber and a lower chamber, the movable clamping strip 42 is a strip-shaped plate extending along the front-back direction of the movable die holder 2, the left side surface of the movable clamping strip 42 is the same as the right side surface of the fixed heating strip 41, the movable clamping strip 42 is movably embedded in the upper chamber of the second vacuum chamber and is stacked on the right isolation block 22, the left side surface of the movable clamping strip 42 is fixedly provided with a silica gel strip 421 which is matched with the left side surface of the movable clamping strip 42, the movable clamping strip 42 and the silica gel strip 421 are both positioned in the second vacuum chamber 200, the upper translation driving device is a translation cylinder 43, the translation cylinder 43 is horizontally arranged outside the right side surface of the movable die holder 2 along the left-right direction, the cylinder body of the translation cylinder 43 is locked on the right side surface of the movable die holder 2, and the free end part of the piston rod of the translation cylinder is tightly stretched into the upper chamber of the second vacuum chamber, namely, the right side surface of the movable die holder 2 is provided with a through hole 23 for tightly penetrating the piston rod of the translation cylinder; when the movable clamping strip 41 is used, the movable clamping strip 42 can be pushed out of the second vacuum chamber by extending the piston rod of the translation cylinder 43, is tightly attached to the fixed heating strip 41, and has a tight-supporting force on the fixed heating strip 41. In the invention, in order to ensure that the installation of the translation cylinder is stable, the installation block 3 can be provided with the placement groove for the cylinder body to be clamped into for placement, so that the cylinder body of the translation cylinder can be placed in the placement groove, the whole system is stable and safe, and the problem of potential safety hazard caused by suspension arrangement of the cylinder body of the translation cylinder is avoided. In the invention, the soft silica gel strip 421 on the movable clamping strip 42 ensures that the movable clamping strip 42 and the fixed heating strip 41 have better hot pressing effect and good sealing effect.

The upper shaping mechanism comprises a first shaping block 51 and a second shaping block 52, the first shaping block 51 and the second shaping block 52 are synchronously connected in a lifting and descending manner, the first shaping block 51 is positioned in the first vacuum chamber 100 and is positioned below the fixed heating strip 41, the second shaping block 52 is positioned in the second vacuum chamber 200 and is positioned below the movable clamping strip 42, and a first lifting driving device for driving the first shaping block to move up and down is arranged on the fixed die holder 1; preferably, it is: the first shaping block 51 and the second shaping block 52 are bar-shaped blocks extending along the front-rear direction, the first shaping block 51 and the second shaping block 52 are connected in series through a connecting rod 53, the connecting rod 53 is positioned at the rear end of the first shaping block 51 and the rear end of the second shaping block 52, the first shaping block 51 is preferably provided with a left side plate, a right pressing plate opposite to the left side plate, and an upper top plate positioned on the left side plate and the right pressing plate, the second shaping block 52 is preferably provided with a left pressing plate, a right side plate opposite to the left pressing plate, and an upper top plate positioned on the left pressing plate and the right side plate, the right pressing plate is arranged opposite to the left pressing plate, the right pressing plate is flush with the lower bottom surface of the left pressing plate, the right pressing plate is identical to the left pressing plate in size, the lower bottom surface of the right pressing plate is positioned above the lower bottom surface of the left side plate, the left side plate is arranged opposite to the right side plate, the lower bottom surface of the left pressing plate is positioned above the lower bottom surface of the right side plate, the upper top plate of the first shaping block 51 is flush with the upper top plate of the second shaping block 52, a left bar-shaped guide rail 54 which extends along the up-down direction of the fixed die holder 1 is fixedly locked on the left cavity wall of the first vacuum chamber 100, a left sliding block 55 which is sleeved outside the left bar-shaped guide rail 54 and slides up and down along the left bar-shaped guide rail 54 is fixedly arranged on the left side surface of the left side plate, a first lifting driving device is a first lifting cylinder 56, the cylinder body of the first lifting cylinder 56 is fixed outside the lower bottom surface of the fixed die holder 1, the free end part of the piston rod of the first lifting cylinder 56 passes through the lower bottom surface of the fixed die holder 1 in a tight fit manner to the first vacuum chamber 100 and is fixedly connected with the left sliding block 55, a right bar-shaped guide rail 57 which extends along the up-down direction of the movable die holder 2 is fixedly locked on the right cavity wall of the second vacuum chamber 200, a right slider 58 sleeved outside the right bar-shaped guide rail 57 and sliding up and down along the right bar-shaped guide rail 57 is fixedly arranged on the right side surface of the right side plate; when the lifting mechanism is used, the piston rod of the first lifting cylinder 56 extends out, the first lifting cylinder 56 pushes the left sliding block 55 to move upwards, the left sliding block 55 moves upwards to enable the first shaping block 51 to move upwards, the first shaping block 51 moves upwards to drive the second shaping block 52 to move upwards and downwards synchronously through the connecting rod 53, and the lifting of the first shaping block and the second shaping block can be stable by matching the sliding blocks with the guide blocks.

The lower shaping mechanism is positioned below the upper shaping mechanism and between the fixed die holder 1 and the movable die holder 2 and falls into the range of the first vacuum chamber and the second vacuum chamber, namely, the lower shaping mechanism can extend into the first vacuum chamber or the second vacuum chamber, the width of the lower shaping mechanism is smaller than the space of the first vacuum chamber and the second vacuum chamber, the top surface of the lower shaping mechanism is provided with a shaping chamber 300 which is formed by a left side plate 61 and a right side plate 62 and is used for the tea packaging bag to fall down, the lower shaping mechanism is movably arranged on the movable die holder 2 in a mode of horizontal movement and vertical movement, a second lifting driving device for driving the lower shaping mechanism to lift up and down is arranged on the movable die holder 2, the lower shaping mechanism and the movable die holder are matched together in a mode of sliding relatively horizontally, and a restoring mechanism for the horizontal movement and resetting of the lower shaping mechanism for the fixed die holder and the movable die holder to divide the die; preferably, it is: the lower shaping mechanism comprises an upper bearing block 63, the left side plate 61 and the right side plate 62, a bar-shaped guide rail extending along the up-down direction of the movable die holder is locked on the right cavity wall of the second vacuum chamber 200, preferably, the bar-shaped guide rail is the right bar-shaped guide rail 57, namely, the bar-shaped guide rail and the right bar-shaped guide rail 57 are the same component, a lower mounting bar 64 is arranged below the upper bearing block 63, the lower mounting bar 64 is horizontally arranged along the left-right direction, the top surface of the lower mounting bar 64 is convexly provided with a bar-shaped guide slide rail 641 extending along the left-right direction of the lower mounting bar 64, the right end part of the lower mounting bar 64 stretches into the second vacuum chamber 200, the right end part of the lower mounting bar 64 is fixedly provided with a sliding block 642 sleeved outside the right bar-shaped guide rail 57 and sliding up and down along the right bar-shaped guide rail 57, the sliding block 642 is positioned below the right sliding block 58, the second lifting driving device is a lower lifting cylinder 65, the cylinder body of the lower lifting cylinder 65 is fixedly arranged on the lower bottom surface of the movable die holder 2, and the free end part of the lower lifting cylinder 65 tightly stretches into the right bottom surface of the second vacuum chamber 200 to be fixedly connected with the lower mounting bar 64; the left end of the lower mounting bar 64 is positioned outside the left side of the movable die holder 2, the upper bearing block 63 is horizontally arranged on the left end of the lower mounting bar 64, the lower bottom surface of the upper bearing block 63 is provided with a lower sliding block 631 sleeved outside the strip-shaped guide sliding rail and sliding along the strip-shaped guide sliding rail, the left side plate 61 and the right side plate 62 are correspondingly locked on the left side and the right side of the top surface of the upper bearing block 63 respectively, the limit block 14 which is arranged on the left side of the lower bottom surface of the upper bearing block 63 in a protruding manner is arranged on the mounting plate 632 locked on the lower bottom surface of the upper bearing block 63 through the mounting plate 632, the limit wheel 65 is arranged vertically, the wheel center axis of the limit wheel 65 extends along the front and rear direction of the upper bearing block 63, the wheel center axis of the limit wheel 65 is arranged on the mounting plate 632 through a wheel center of the limit wheel 65, the left side of the limit wheel 65 is positioned outside the left side surface of the upper bearing block 63, namely, the left part of the limit wheel 65 protrudes outside the upper bearing block 63, the limit block 14 which is arranged opposite to the limit wheel 65 is arranged in a protruding manner, the first vacuum chamber 100 is provided with a limit block 14 which extends along the upper and the lower direction of the fixed die holder 1, and the spacing between the limit wheel 65 and the limit block 14 is equal to the center point of the fixed between the limit block 300 and the fixed die holder 1 and the right side.

The restoring mechanism is a spring 66 which is horizontally arranged along the left and right directions of the upper bearing block 63, the left end of the spring 66 is fixed on the right side surface of the upper bearing block 63, and is positioned in front of the lower mounting bar 64, the right end of the spring 66 is fixed on the left side surface of the sliding block 642; when the lower shaping mechanism is applied, the piston rod of the lower lifting cylinder 65 stretches out to enable the lower mounting bar 64 to move up and down along the right bar-shaped guide rail 57, the lower mounting bar 64 moves downwards to enable the upper bearing block 63 to move up and down, meanwhile, during die assembly, the left movement of the movable die holder 2 enables the upper bearing block 63 to move leftwards into the first vacuum chamber, when the limiting wheel 65 is tightly abutted against the limiting block 14, the upper bearing block 63 cannot move any more, at the moment, the center line of the shaping chamber 300 is just located at the same position with the right side surface of the fixed die holder 2, afterwards, the movable die holder 2 continues to move leftwards, due to the relative sliding fit of the upper bearing block 63 and the lower mounting bar 64, the right half of the shaping chamber 300 can just fall into the second vacuum chamber, at the moment, the spring 66 is compressed, the movable die holder 2 and the fixed die holder 1 are completely clamped, and during die assembly, the restoring force of the movable die holder 2 is utilized to enable the upper bearing block 63 to be restored between the fixed die holder and the movable die holder, so that the lower shaping structure is not affected by the fixed die holder and the first shaping block of the upper shaping mechanism is located at the left half of the shaping chamber during die assembly, and the upper shaping mechanism is located at the right half of the shaping chamber during die assembly, and the shaping effect is better.

The push-out mechanism capable of pushing the tea packaging bag 400 in the shaping cavity out of the packaging mechanism is fixedly arranged on the rear side of the fixed die holder 1, the push-out mechanism comprises a mounting plate 71 and a push-out air cylinder 72, the mounting plate 71 extends along the left-right direction of the fixed die holder 1, the left end of the mounting plate 71 is matched with the rear side wall of the fixed die holder 1 in a fitting and locking manner, the right end of the mounting plate 71 extends towards the movable die holder 2 and is positioned outside the fixed die holder 1, namely, the right end of the mounting plate 71 falls into the space between the fixed die holder and the movable die holder, the push-out air cylinder 72 is horizontally arranged along the front-rear direction of the fixed die holder 1, the cylinder body of the push-out air cylinder 72 is fixed on the rear side surface of the mounting plate 71, the free end part of the piston rod of the push-out air cylinder 72 is arranged forwards, and a through hole (not shown in the figure) for allowing the piston rod of the push-out air cylinder is formed on the mounting plate 71; thus, when the piston rod of the push-out cylinder 72 is extended, one end of the piston rod passes out of the mounting plate 71 to the inside of the shaping chamber 300 through the pass-out hole, and the tea packing bag 400 in the shaping chamber 300 can be pushed out of the packing mechanism forward by the pushing force of the piston rod.

The invention relates to a packaging mechanism for a tea packaging machine, which is arranged on the tea packaging machine, and a shaping cavity of the packaging mechanism is received below a tea falling opening of the tea packaging machine. When the tea shaping device works, the lower lifting air cylinder 65 is started, the lower lifting air cylinder 65 pushes the upper bearing block 63 to move upwards to the upper shaping mechanism, so that the shaping cavity 300 is borne below the tea falling opening, tea leaves are lightly dropped into the shaping cavity 300, the distance between the shaping cavity 300 and the tea falling opening is smaller, and the phenomenon that the tea packaging bag 400 falls down when the tea leaves fall is avoided; after the tea packaging bag 400 falls down, the upper bearing block 63 moves down to the lower part of the upper shaping mechanism, at this time, the part of the tea packaging bag 400 with tea leaves is positioned in the shaping cavity 300, the part without tea leaves extends out of the shaping cavity 300 upwards, at this time, the driving cylinder is started, the movable die holder 2 translates leftwards, the left side of the lower shaping mechanism correspondingly stretches into the first vacuum cavity 100 along with the translation of the movable die holder 2, simultaneously, the lower shaping mechanism is limited by the left cavity of the first vacuum cavity 100 along with the downward movement of the movable die holder 2, the movable die holder 2 can continuously translate leftwards and be matched with the fixed die holder 1 leftwards and rightwards due to the sliding fit of the upper bearing block 63 and the lower mounting strip 64, so that the two die clamping is realized, at the same time, the right side of the lower shaping mechanism correspondingly stretches into the second vacuum cavity 200, and the left side and the right side of the lower shaping mechanism correspondingly lie in the first vacuum cavity and the second vacuum cavity respectively, the first shaping block is arranged above the left half part of the shaping cavity, the second shaping block is arranged above the right half part of the shaping cavity, the part of the tea packaging bag 400 outside the shaping cavity is correspondingly clamped between the fixed heating strip 41 and the movable clamping strip 42 and between the right clamping plate of the first shaping block 51 and the left clamping plate of the second shaping block 52, after the die assembly, the outside vacuumizing system is utilized to suck the air in the tea packaging bag 400 by utilizing the vacuum air hole 11 and the airtight cavity enclosed by the first vacuum cavity and the second vacuum cavity, at the moment, if the tea in the tea packaging bag 400 is green tea, the vacuum amount flowing into the vacuum air hole 11 is increased to suck the air in the tea packaging bag, then the translation air cylinder 43 drives the movable clamping strip 42 to translate towards the direction of the fixed heating strip 41 and is in compression fit with the fixed heating strip 41, the upper part of the tea packaging bag 400 is sealed by hot pressing, after sealing, the movable die holder 2 translates in the direction away from the fixed die holder 1, the movable die holder 2 is separated from the fixed die holder 1, the lower shaping mechanism recovers back between the movable die holder and the fixed die holder, and at the moment, the pushing cylinder 72 is started to push the packaged tea packaging bag 400 forwards, so that the green tea packaging can be completed; if the tea in the tea packaging bag 400 is black tea, the vacuum minute quantity in the vacuum air hole 11 flows into the tea packaging bag 400 to carry out a small amount of vacuumizing, afterwards, the movable clamping strip 42 horizontally moves to be in press fit with the fixed heating strip 41, the tea packaging bag 400 is subjected to hot-press sealing, after sealing, the first lifting cylinder 56 is started, the first shaping block 51 and the second shaping block 52 clamp the upper part of the tea packaging bag 400 to be located at the position below the hot sealing and horizontally move downwards, the first shaping block 51 and the second shaping block 52 can clamp the tea packaging bag 400 downwards to be straightened and smooth in a tea-free area, when the first shaping block 51 and the second shaping block 52 move downwards to the position above the tea in the tea packaging bag 400, the lower end face of the right clamping plate and the lower end face of the left clamping plate are tightly pressed on the tea in the tea packaging bag 400, the upper shaping mechanism cannot move downwards to the tea packaging bag 400, at the moment, the lower lifting cylinder 65 is started, the lower shaping mechanism cannot move upwards due to the limitation of the upper shaping mechanism, the lower shaping mechanism cannot move upwards, the upper shaping mechanism has the upper side plate and the upper side plate is in a straight shape with the upper side plate 62, and the effect of being located at the position above the tea packaging bag 400 is perfectly, and the tea packaging bag is in a straight and smooth area, and the effect is achieved by the effect of the upper side plate is located on the tea packaging bag 400.

The packaging mechanism for the tea packaging machine has the following beneficial effects:

1. the packaging machine can meet the packaging of green tea packaging forms and the packaging of black tea packaging forms, realizes the general packaging of green tea and black tea, has multiple packaging functions, is multipurpose, does not need to be provided with two tea packaging machines with different packaging forms in a tea manufacturer factory building, and greatly saves the production cost and the mechanical occupation space of tea manufacturers;

2. the air quantity in the tea packaging bag can be properly regulated according to the packaging requirements of customers so as to achieve different packaging shapes and various packaging forms;

3. the air quantity in the tea packaging bag can be properly extracted when the black tea is packaged, so that the air quantity of the tea packaging bag is not excessive when the air quantity required by the packaging of the black tea packaging bag is ensured, the fresh-keeping effect of the tea in the tea packaging bag is good, the problem that the fresh-keeping effect of the black tea is influenced due to the fact that the air quantity in the bag is excessive when the traditional black tea packaging bag is packaged is avoided, and the black tea packaging is not influenced is avoided;

4. the sealing and the lower shaping can enable the tea packaging bag to expand, so that no tea or tea foam residue exists on the inner wall of the tea packaging bag above the tea area, the packaging effect is good, the phenomenon of uneven appearance of the tea packaging bag above the tea area is avoided, and the problem of uneven packaging caused by the fact that the tea or tea foam residue exists on the traditional tea packaging bag above the tea area is avoided;

5. After the upper shaping and the lower shaping, the tea packaging bag can be expanded under the coextrusion of the upper shaping and the lower shaping, so that the two side surfaces of the tea packaging bag in the thickness direction can be opened, the six surfaces of the tea packaging bag are shaped through the second shaping, the shaping effect is good and attractive, and the problems that the shaping effect is slightly poor and attractive due to the fact that the traditional shaping mechanism for black tea packaging can only perform four-side shaping are avoided; meanwhile, the expansion operation can ensure that the tea leaves in the tea packaging bag are correspondingly arranged on the two side surfaces of the thickness direction of the tea packaging bag, so that the tea leaves are fully and uniformly contained in the tea packaging bag, and the packaging effect of the tea packaging bag is good and attractive;

6. the device has the advantages of simple integral structure, compact layout, small volume, convenient disassembly and assembly, easy maintenance, simple operation, stable and safe operation and the like.

In the packing mechanism for the tea packing machine of the invention, the left side surface of the movable die holder 2 is preferably adhered with the sealing rubber strips (not shown in the figure) which are circumferentially arranged along the circumferential direction of the second vacuum chamber outside the part of the second vacuum chamber 200, namely, a concave cavity 24 arranged around the second vacuum chamber 200 is concavely arranged on the left side surface of the movable die holder 2, a sealing rubber strip is embedded in the concave cavity 24, and the sealing rubber strip protrudes out of the concave cavity 24, so that the die assembly of the movable die holder and the fixed die holder is sealed by using the sealing rubber strip, and the die assembly effect is good.

In the packaging mechanism for the tea packaging machine, the lower end of the left side plate 61 is directly matched with the left side surface of the upper bearing block 63 and is locked together, the right side wall of the lower end part of the right side plate 62 extends rightward to form a mounting plate 621 which is matched with the upper bearing block 63 in a superimposed manner and is locked together, and the structure of the left side plate 61 and the right side plate 62 limits that the mounting of the left side plate and the right side plate does not occupy space and is easy to disassemble; further, the upper end of the left side plate 61 is extended with a left inclined plate 611 inclined to the left, the upper end of the right side plate 62 is extended with a right inclined plate 622 inclined to the right, the left inclined plate 611 and the right inclined plate 622 form a horn channel tapering from top to bottom, which can guide the falling of the tea packaging bag 400, and is easy for the falling of the tea packaging bag, and is not easy for the falling of the tea packaging bag out of the shaping chamber.

The packaging mechanism for the tea packaging machine provided by the invention is characterized in that the right side surface of the right pressing plate is flush with the right side surface of the fixed die holder, and the left side surface of the left pressing plate is flush with the left side surface of the movable die holder, so that the left pressing plate and the right pressing plate can be correspondingly pressed on the left side and the right side of a tea packaging bag of a shaping cavity when the movable die holder and the fixed die holder are matched, and the shaping effect of the tea packaging bag is ensured.

In the present invention, the mold clamping driving device, the upper translation driving device, the first lifting driving device and the second lifting driving device may adopt a motor driving mode other than the cylinder driving mode of the present embodiment, and the motor driving mode is a mode commonly used in the field of current mechanical driving, and is not described here, and the motor driving mode is also within the protection scope of the present invention.

The form of the present invention is not limited to the illustrations and examples, and any person who performs a similar idea of the present invention should be regarded as not departing from the scope of the patent of the invention.

Claims

1. The packaging mechanism for the tea packaging machine is characterized by comprising a fixed die holder, a movable die holder, an upper heat sealing mechanism, an upper shaping mechanism and a lower shaping mechanism, wherein,

2. A packaging mechanism for a tea packing machine as claimed in claim 1 wherein: the fixed die holder and the movable die holder are square blocks which are vertically arranged, the fixed die holder is arranged on the left side, a through hole which is communicated into the first vacuum chamber from outside to inside is formed in the front side wall of the fixed die holder, the through hole is a vacuum air hole, the movable die holder is arranged on the right side, the push-out mechanism is arranged on the rear side, the right side of the movable die holder is provided with a mounting block which is fixedly arranged with a tea packing machine base lock, the mounting block is correspondingly vertically arranged square blocks, guide connecting rods which are respectively fixedly arranged on the front side and the rear side of the upper end and the lower end of the mounting block and are used for connecting the movable die holder and the fixed die holder in series, the movable die holder is movably matched with the guide connecting rods, the left side rear end of the mounting block is convexly provided with a clamping block, the right side of the movable die holder is provided with a clamping hole which is used for clamping the clamping block to be embedded in, the driving cylinder is arranged horizontally along the left and right directions, the free end of the driving cylinder is connected with the middle part of the right side of the movable die holder, and the movable die holder is fixedly connected with the tea packing machine base lock.

3. A packaging mechanism for a tea packing machine as claimed in claim 2 wherein: and sealing rubber strips which are circumferentially arranged along the circumferential direction of the second vacuum chamber are adhered to the left side surface of the movable die holder outside the part of the second vacuum chamber.

4. A packaging mechanism for a tea packing machine as claimed in claim 2 wherein: the right side face of the fixed heating strip is fixedly provided with a heating sheet, the heating sheet is flush with the die assembly face of the fixed die holder, and the left side face of the movable clamping strip is fixedly provided with a silica gel strip which is matched with the left side face of the movable clamping strip.

5. A packaging mechanism for a tea packing machine as claimed in claim 2 wherein: the pushing mechanism comprises a mounting plate and a pushing cylinder, wherein the mounting plate extends along the left and right directions of the fixed die holder, the left end of the mounting plate is matched with the rear side wall of the fixed die holder in a matching and locking mode, the right end of the mounting plate extends towards the direction of the movable die holder and is positioned outside the fixed die holder, the pushing cylinder is horizontally arranged along the front and rear directions of the fixed die holder, the cylinder body of the pushing cylinder is fixed on the rear side surface of the mounting plate, the free end part of the piston rod of the pushing cylinder is arranged forward, and a penetrating hole for the piston rod of the pushing cylinder to penetrate is formed in the mounting plate.

6. A packaging mechanism for a tea packing machine as claimed in claim 2 wherein: the lower shaping mechanism is provided with an upper bearing block, the left side plate and the right side plate, a bar-shaped guide rail extending along the up-down direction of the movable die holder is locked on the right cavity wall of the second vacuum chamber, a sliding block sliding up and down along the bar-shaped guide rail is arranged on the bar-shaped guide rail in a sliding manner, a lower mounting bar extending out of the second vacuum chamber leftwards is fixedly arranged on the left side of the sliding block, the second lifting driving device is a lower lifting cylinder, the cylinder body of the lower lifting cylinder is fixedly arranged on the lower bottom surface of the movable die holder, and the free end part of a piston rod of the lower lifting cylinder tightly extends into the second vacuum chamber and is fixedly connected with the right end of the lower mounting bar; the upper bearing block is horizontally arranged at the left end of the lower mounting bar, the lower bottom surface of the upper bearing block is provided with a lower sliding block sleeved outside the strip-shaped guide sliding rail and sliding along the strip-shaped guide sliding rail, the left side plate and the right side plate are respectively correspondingly locked on the left side and the right side of the top surface of the upper bearing block, the left side of the lower bottom surface of the upper bearing block is provided with a limiting wheel arranged behind the lower mounting bar through a mounting piece, the limiting wheel is vertically arranged, the wheel center axis of the limiting wheel extends along the front-rear direction of the upper bearing block, the left side of the limiting wheel is positioned outside the left side surface of the upper bearing block, the first vacuum chamber is internally provided with a limiting block arranged in a protruding mode relative to the limiting wheel, and the distance between the limiting wheel and the limiting block is equal to the distance between the center point of the shaping chamber and the right side surface of the fixed die holder.

7. A packaging mechanism for a tea packing machine as claimed in claim 6 wherein: the lower end of the left side plate is matched with the left side surface of the upper bearing block and locked together, the upper end part of the left side plate extends upwards to form a left inclined plate which is inclined leftwards, the right side wall of the lower end part of the right side plate extends rightward to form a mounting plate which is matched with the upper bearing block in a superposed manner and is locked together, the upper end part of the right side plate extends upward to form a right inclined plate which inclines rightward, and the left inclined plate and the right inclined plate form a horn channel which tapers from top to bottom.

8. A packaging mechanism for a tea packing machine as claimed in claim 6 wherein: the restoring mechanism is a spring horizontally arranged along the left-right direction of the upper bearing block, the left end of the spring is fixed on the right side surface of the upper bearing block and is positioned in front of the lower mounting strip, and the right end of the spring is fixed on the left side surface of the sliding block.

9. A packaging mechanism for a tea packing machine as claimed in claim 2 wherein: the first shaping block and the second shaping block are bar-shaped blocks extending along the front-back direction, the first shaping block and the second shaping block are connected in series through a connecting rod, the connecting rod is positioned outside the upper part of the rear side of the shaping cavity, the first shaping block is provided with a left side plate, a right pressing plate opposite to the left side plate and an upper top plate positioned on the left side plate and the right pressing plate, the right side surface of the right pressing plate is flush with the right side surface of the fixed die holder, the second shaping block is provided with a left pressing plate, the right side plate opposite to the left pressing plate and the upper top plate positioned on the left pressing plate and the right side plate, the left side surface of the left pressing plate is flush with the left side surface of the movable die holder, a left bar-shaped guide rail extending along the upper-lower direction of the fixed die holder is locked on the left cavity wall of the first vacuum cavity, the left side face of the left side plate is fixedly provided with a left sliding block which is sleeved outside the left strip-shaped guide rail and slides up and down along the left strip-shaped guide rail, the first lifting driving device is a first lifting cylinder, the cylinder body of the first lifting cylinder is fixed outside the lower bottom face of the fixed die holder, the free end part of the piston rod of the first lifting cylinder is tightly matched with the lower bottom face of the fixed die holder to the first vacuum chamber and fixedly connected with the left sliding block, the right cavity wall of the second vacuum chamber is fixedly provided with a right strip-shaped guide rail which extends up and down along the movable die holder, and the right side face of the right side plate is fixedly provided with a right sliding block which is sleeved outside the right strip-shaped guide rail and slides up and down along the right strip-shaped guide rail.

10. A packaging mechanism for a tea packing machine as claimed in claim 2 wherein: the first vacuum chamber is positioned above the first shaping block, a left isolation block for isolating the first vacuum chamber from an upper chamber and a lower chamber is arranged on the left side plate of the fixed die holder, an extending mounting hole which penetrates through the upper chamber is formed in the left side plate of the fixed die holder, the fixed heating strip is a strip-shaped plate extending along the front-back direction of the fixed die holder, the fixed heating strip is tightly matched and embedded in the upper chamber through the extending mounting hole, and a mounting block which is mutually stuck and locked with the left side surface of the fixed die holder is arranged on the left side surface of the fixed heating strip; the second vacuum chamber is located on the second shaping block, a right isolation block for isolating the second vacuum chamber from the upper chamber and the lower chamber is arranged above the second shaping block, the movable clamping strip is a strip-shaped plate extending along the front-back direction of the movable die holder, the movable clamping strip is movably embedded in the upper chamber of the second vacuum chamber, the upper translation driving device is a translation cylinder, the translation cylinder is horizontally arranged outside the right side surface of the movable die holder along the left-right direction, a cylinder body of the translation cylinder is locked on the right side surface of the movable die holder, and the free end part of a piston rod of the translation cylinder tightly stretches into the upper chamber of the second vacuum chamber to be fixedly connected with the movable clamping strip.