CN111070571B - Cosmetic pencil body injection mold - Google Patents

Abstract

The invention relates to a cosmetic pen body injection mold, which comprises a fixed mold plate fixedly arranged on an injection molding machine and a movable mold plate connected with the fixed mold plate in a sliding manner, wherein the fixed mold plate is provided with a squirt nozzle, the movable mold plate comprises a discharge plate and a forming plate, the forming plate is provided with a forming cavity communicated with the squirt nozzle, the fixed mold plate is provided with an upper forming column capable of extending into the forming cavity, the discharge plate is provided with a lower forming column capable of extending into the forming cavity and abutting against the upper forming column, the circumferential array of the outer surface of the lower forming column is provided with a plurality of convex edges, the discharge plate is arranged on the forming plate in a sliding manner along the sliding direction of the movable mold plate, when in demolding, the movable mold plate firstly slides integrally, the upper forming column is moved out of the forming cavity, when the movable mold plate slides to the upper forming column and completely moves out of the forming cavity, the forming plate is fixed, the discharge plate continues to slide, at the moment, the lower forming, the pen body can be taken down from the lower forming column, and the demolding is very convenient.

Description

Cosmetic pencil body injection mold

Technical Field

The invention relates to the technical field of injection molds, in particular to an injection mold for a cosmetic pen body.

Background

The existing plastic forming die generally comprises a static die and a movable die, wherein a runner through which liquid plastic flows and a cavity communicated with the runner are formed in the static die, a core is arranged on the movable die, and an injection molding cavity is formed between the core and the cavity when the movable die is abutted against the static die; liquid plastic is injected into the flow channel through the injection molding machine, then is conveyed into the injection molding cavity through the flow channel, and then the injection molding cavity is cooled, so that the plastic is solidified into a required product shape, then the static mold and the movable mold are driven to be separated, and finally the molded product is ejected out from the injection molding cavity through the ejector rod, and the manufacture of the product is completed.

The injection mold in the prior art mainly comprises a fixed mold and a movable mold, wherein the fixed mold core and the movable mold core are respectively arranged on the fixed mold and the movable mold, a cavity is formed inside the fixed mold and the movable mold during mold closing, raw materials are injected into the injection mold by the injection molding machine, the raw materials enter the cavity and fill the cavity, and a product with a corresponding shape can be formed after cooling.

The above prior art solutions have the following drawbacks: when the cosmetic pencil body as shown in fig. 1 is molded, a cylindrical fixed mold core and a cylindrical movable mold core are generally adopted, the movable mold core is inserted into the fixed mold core during mold closing, raw materials enter the fixed mold core, so that the inner wall and the outer wall of the pencil body are molded, the movable mold core is pulled out from the fixed mold core after the injection molding is finished, the cosmetic pencil body needs to be manually taken out from the fixed mold core at the moment, and the cosmetic pencil body is long and thin in integral structure, so that the taking out of the cosmetic pencil body from the fixed mold core is very laborious, the demolding process is very troublesome, and the working efficiency is low.

Disclosure of Invention

The invention aims to provide a cosmetic pencil body injection mold which can be used for conveniently taking out an injection molded cosmetic pencil body from a fixed mold core and improving the working efficiency.

The above object of the present invention is achieved by the following technical solutions: the utility model provides a cosmetic pencil pen body injection mold, slides the movable mould board of being connected including fixed die plate that sets up on the injection molding machine and with the die plate, be equipped with purt mouth on the die plate, the movable mould board includes ejection of compact board and sets up the shaping board between ejection of compact board and die plate, be equipped with on the shaping board with the communicating shaping chamber of purt mouth, shaping chamber one end is towards the die plate, and the other end is towards ejection of compact board, be equipped with the last shaping post that can stretch into the shaping intracavity on the die plate, be equipped with on the ejection of compact board can stretch into the shaping intracavity and with the lower shaping post of last shaping post butt, the surface circumference array of shaping post is equipped with a plurality of beads down, the ejection of compact board slides along movable mould board slip direction and sets up on the shaping board.

Through adopting above-mentioned technical scheme, during the drawing of patterns, the first whole slip of movable mould board, it shifts out from the shaping intracavity to go up the shaping post, after the movable mould board slides and shifts out the shaping chamber completely to last shaping post, the shaping board is fixed, go out the flitch and continue to slide, at this moment because the bead on the shaping post down inlays and establishes in the body of a pen, consequently, the body of a pen in the shaping intracavity can be taken out to lower shaping post, thereby accomplish the drawing of patterns of a pen body, at this moment because last shaping post has roll-off, the effectual resistance that reduces drawing of patterns in-process body of a pen received, make things convenient for a pen body to follow the shaping intracavity roll-off, and after the good body of a pen of moulding plastics and lower shaping post roll-off from the shaping intracavity, also can be very convenient take off the body of a pen from lower shaping post, the drawing of patterns is very convenient.

The invention is further configured to: the main guide columns are arranged at four corners of the fixed die plate and sequentially penetrate through the forming plate and the discharging plate, and fixing parts for fixing the forming plate on the main guide columns after the upper forming columns slide out of the forming cavity in demolding are arranged on the main guide columns.

Through adopting above-mentioned technical scheme, after the shaping plate slides and targets in place, the mounting can fix the shaping plate, and the convenience slides at the shaping plate and targets in place the back, and the relative shaping plate of play flitch slides, and then the shaping pole shifts out in following the shaping plate under the convenience.

The invention is further configured to: the fixing piece comprises a main spring sleeved on the main guide pillar, one end of the main spring is abutted to the fixed die plate, the other end of the main spring is abutted to the forming plate, a main sleeve matched with the main guide pillar is arranged on the forming plate, a wedge block is arranged on the inner wall of the main sleeve in a sliding mode along the radial direction of the main sleeve, the inclined surface of the wedge block faces the fixed die plate, an elastic piece for driving the wedge block to slide towards the main guide pillar is arranged in the main sleeve, and a positioning groove matched with the wedge block is arranged on the main guide pillar.

Through adopting above-mentioned technical scheme, after last shaping post was located the profiled sheeting completely, the voussoir slided the position that corresponds with the constant head tank, and under the effect of pressure spring this moment, in the voussoir embedding constant head tank, it continues to slide to block the profiled sheeting, in addition, because the inclined plane of voussoir is towards the fixed die plate, therefore the voussoir can only play one-way spacing, can not cause the influence to the compound die of profiled sheeting, adopts the voussoir as the mounting, simple structure, reliable operation.

The invention is further configured to: the ejection of compact board includes the bottom plate and slides the push pedal of setting on the bottom plate, the direction of sliding of push pedal is the same with the movable mould board direction of sliding, lower shaping post is fixed on the bottom plate, be equipped with in the push pedal with lower shaping post complex through hole, be equipped with on the bottom plate and take out the gliding driving piece of driving push pedal orientation shaping board behind the shaping chamber at lower shaping post.

Through adopting above-mentioned technical scheme, after the profiled sheeting slides and targets in place, go out the flitch and can continue to slide, after the bottom plate slides and targets in place, because the push pedal is connected with the bottom plate slides, under the drive of driving piece, originally with the push pedal of bottom plate laminating slide towards the profiled sheeting, will descend the body of a pen on the shaping post ejecting from lower shaping post, the body of a pen can be followed and fall out in the injection mold to accomplish the blanking of a body of a pen, further improved the drawing of patterns efficiency of a body of a pen.

The invention is further configured to: the bottom plate is provided with secondary guide pillars at four corners of the bottom plate, the secondary guide pillars are arranged in parallel to the sliding direction of the movable template, and the secondary guide pillars penetrate through the push plate and then are connected with the forming plate in a sliding mode.

Through adopting above-mentioned technical scheme, inferior guide pillar is on a parallel with the setting of leading guide pillar, and after the shaping plate is fixed, the play flitch need continue to slide, can play the guide effect by inferior guide pillar this moment, continues to guide the play flitch and slides, sets up the length that inferior guide pillar can effectual reduction main guide pillar.

The invention is further configured to: the driving piece comprises an electromagnet embedded on the bottom plate, an adsorption block is arranged on the push plate corresponding to the electromagnet, a secondary spring is sleeved on the secondary guide pillar, one end of the secondary spring is abutted to the bottom plate, and the other end of the secondary spring is abutted to the push plate.

Through adopting above-mentioned technical scheme, under the normal condition, the electro-magnet circular telegram, electro-magnet and absorption piece cooperation, the elasticity of inferior spring is overcome to the magnetic force that the electro-magnet produced, adsorbs the push pedal on the bottom plate, after the electro-magnet outage, inferior spring can drive the push pedal and slide towards the profiled sheeting, and the push pedal will be ejecting with the body of a pen on the lower shaping post to realize that the drive push pedal slides towards the profiled sheeting.

The invention is further configured to: the forming plate is provided with a secondary sleeve matched with the secondary guide post, the secondary guide post is provided with a conductive strip along the length direction of the secondary guide post, the secondary sleeve is provided with a conductive block matched with the conductive strip, the conductive strip and the conductive block are connected with the electromagnet in series, and when the lower forming post slides outwards, the conductive block is contacted with the conductive strip; when the lower molding column slides out of the molding cavity, the conductive blocks are staggered with the conductive strips.

Through adopting above-mentioned technical scheme, after the shaping plate slides and targets in place, under the drive of portable platen, push pedal and bottom plate continue to slide, drive shaping sleeve outwards to slide, conducting block and busbar contact this moment, the electro-magnet is still in the on-state this moment, push pedal and bottom plate are laminating mutually still, when the post cunning moves outside the shaping chamber, the conducting block staggers with the busbar, the electro-magnet outage this moment, the electro-magnet is relieved the fixed to the push pedal, inferior spring drive push pedal slides towards the shaping plate, with the ejecting lower shaping post of pen body.

The invention is further configured to: the end part of the upper forming column is provided with a positioning lug, the end surface of the lower forming column facing the upper forming column is provided with a positioning groove, one end of the forming cavity close to the fixed die plate is provided with a guide sleeve matched with the upper forming column, and the inner wall of the guide sleeve is provided with a guide groove for raw materials to flow into the forming cavity.

Through adopting above-mentioned technical scheme, during the compound die, in the locating convex block embedding positioning groove, lower shaping post can align with last shaping post when the compound die, has improved the smooth degree of a body inner wall, in addition, sets up the guide pin bushing and not only can play the guide effect to last shaping post, can also avoid a body to follow and go up the shaping post and be taken out the die cavity, plays limiting displacement to a body.

The invention is further configured to: the forming plate is provided with a first cooling flow channel along the length direction of the forming plate, a forming sleeve is embedded on the forming plate, a forming cavity is arranged in the forming sleeve, a cooling ring groove is arranged outside the forming sleeve in the forming plate, and the first cooling flow channel is communicated with the cooling ring groove.

Through adopting above-mentioned technical scheme, during the cooling, the cooling water gets into and exports through the cooling ring groove again behind the first cooling runner, and the cooling water can encircle the shaping sleeve, has improved the area of contact of shaping sleeve with the cooling water for heat exchange speed, and then the effectual cooling rate that improves the body of the pen.

The invention is further configured to: and the bottom plate and the fixed die plate are provided with second cooling flow channels, counter bores are arranged in the upper forming column and the lower forming column along the length direction of the upper forming column and the lower forming column, and the counter bores are communicated with the corresponding second cooling flow channels.

Through adopting above-mentioned technical scheme, after leading to water, the cooling water can enter into the counter bore, and the cooling water can also play the cooling action to last shaping post and lower shaping post, all can cool off the body of a pen from the inside and outside both sides of the body of a pen like this, has further improved the cooling efficiency of the body of a pen.

In conclusion, the beneficial technical effects of the invention are as follows:

1. by arranging the discharging plate, the pen body can be conveniently taken out of the forming cavity, and the demolding efficiency of the pen body is effectively improved;

2. set up the push pedal and can further be ejecting from lower shaping post with the body of a pen to the slip of push pedal passes through conducting block and conducting bar control, can realize the automatic control of push pedal, has improved degree of automation and production efficiency.

Drawings

Fig. 1 is a schematic view of the pen body structure of the present invention (bottom up).

FIG. 2 is an exploded view of the assembly of the stationary platen, the forming platen and the discharge platen of the present invention.

Fig. 3 is a sectional view of the assembly of the forming sleeve and guide sleeve of the present invention.

Fig. 4 is a side view of fig. 2.

Fig. 5 is a sectional view of a portion a-a in fig. 4.

Fig. 6 is a sectional view of a portion B-B in fig. 4.

Fig. 7 is an enlarged view of the portion C in fig. 6.

FIG. 8 is a schematic view of the lower profile post of the present invention.

In the figure, 1, a fixed template; 11. a squirt nozzle; 12. mounting a forming column; 121. positioning the bump; 13. a main guide post; 131. a main spring; 132. positioning a groove; 2. moving the template; 21. forming a plate; 211. a main sleeve; 212. a first cooling flow passage; 213. cooling the ring groove; 22. a discharge plate; 221. pushing the plate; 2211. a through hole; 2212. an adsorption block; 222. a base plate; 2221. an electromagnet; 3. forming a sleeve; 31. a molding cavity; 32. a guide sleeve; 321. a diversion trench; 4. a lower forming column; 41. a positioning groove; 42. a rib; 5. sinking a groove; 6. mounting holes; 61. a wedge block; 62. a pressure spring; 7. a secondary guide post; 71. a secondary spring; 72. a conductive strip; 8. a secondary sleeve; 81. a conductive block; 9. a second cooling flow channel; 91. a counter bore; 10. a pen body.

Detailed Description

The present invention is described in further detail below with reference to figures 1-8.

Referring to fig. 2, the injection mold for the pen body of the cosmetic pen disclosed by the invention comprises a fixed mold plate 1 fixedly arranged on an injection molding machine and a movable mold plate 2 connected with the fixed mold plate 1 in a sliding manner, wherein the movable mold plate 2 is fixed on a movable platen of the molding machine, and the movable platen drives the movable mold plate 2 to slide relative to the fixed mold plate 1, so that the mold closing and mold opening of the injection mold are realized.

Referring to fig. 2 and 3, a sprue bushing 11 is arranged at the center of a fixed die plate 1, a feeding runner is further arranged in the fixed die plate 1, a movable die plate 2 comprises a forming plate 21 and a discharging plate 22, the fixed die plate 1, the discharging plate 22 and the forming plate 21 are arranged in parallel, the forming plate 21 is arranged between the fixed die plate 1 and the discharging plate 22, a forming sleeve 3 is embedded in the forming plate 21, two end faces of the forming sleeve 3 extend to two end faces of the forming plate 21 respectively, a forming cavity 31 is arranged in the forming sleeve 3, the shape of the inner wall of the forming cavity 31 is the same as that of the outer wall of a pen body 10 of a cosmetic pen, two ends of the forming cavity 31 are communicated with the outside, one end of the forming cavity 31 faces the fixed die plate 1, the other end faces the discharging plate 22, and after die assembly, one end of the forming cavity 31 close to the fixed die plate 1 is communicated with the feeding runner.

Referring to fig. 4 and 5, an upper molding column 12 is provided on the fixed die plate 1 along the length direction of the molding cavity 31, a lower molding column 4 capable of extending into the molding cavity 31 is provided on the discharge plate 22, the upper molding column 12 and the lower molding column 4 are provided corresponding to each other, when die assembly is performed, the upper molding column 12 and the lower molding column 4 extend into the molding cavity 31 from both ends of the molding cavity 31 and abut against each other, and the outer wall of the upper molding column 12 abutting against the lower molding column 4 has the same shape as the inner wall of the body 10 of the cosmetic pencil. After the die assembly is finished, the raw materials enter the fixed die plate 1 from the sprue bushing 11, enter the molding cavity 31 through the feeding runner, and are finally cooled and molded in the molding cavity 31.

Referring to fig. 5, in order to improve the coaxiality between the upper forming column 12 and the lower forming column 4 during mold closing, a positioning bump 121 is arranged at the end of the upper forming column 12, and a positioning groove 41 is arranged on the end face, facing the upper forming column 12, of the lower forming column 4, during mold closing, the positioning bump 121 is embedded into the positioning groove 41, so that the lower forming column 4 and the upper forming column 12 can be aligned during mold closing, and the smoothness of the inner wall of the pen body 10 is improved.

Referring to fig. 8, a guide sleeve 32 matched with the upper forming column 12 is arranged at one end of the forming cavity 31 close to the fixed die plate 1, the guide sleeve 32 is embedded at the end of the forming cavity 31, a guide groove 321 for raw materials to flow into the forming cavity 31 is formed in the inner wall of the guide sleeve 32, the guide sleeve 32 can not only guide the upper forming column 12, but also prevent the pen body 10 from being taken out of the forming cavity 31 along with the upper forming column 12, and limit the pen body 10.

Referring to fig. 5 and 8, in order to facilitate the demolding of the pen body 10, the forming plate 21 and the discharging plate 22 can slide relatively when the mold is opened, that is, the lower forming column 4 can also be pulled out from the forming cavity 31, and a plurality of ribs 42 are arranged on the circumferential array of the outer surface of the lower forming column 4, the circumferential array of the ribs 42 is arranged on the outer surface of the lower forming column 4, after the injection molding is completed, the ribs 42 on the surface of the lower forming column 4 are embedded on the inner wall of the pen body 10, during the demolding, the movable mold plate 2 slides integrally first, the upper forming column 12 is moved out from the forming cavity 31, when the movable mold plate 2 slides to the upper forming column 12 and is completely moved out of the forming cavity 31, the forming plate 21 is fixed, the discharging plate 22 continues to slide, at this time, because the ribs 42 on the lower forming column 4 are embedded in the pen body 10, the lower forming column 4 can pull out the pen body 10 in the forming cavity 31, thereby completing the demolding of the pen body 10, at this moment, because the upper forming column 12 already slides out, the resistance that the pen body 10 received in the demolding process is effectively reduced, the pen body 10 is convenient to slide out from the forming cavity 31, and after the injection-molded pen body 10 and the lower forming column 4 slide out from the forming cavity 31, the pen body 10 can be conveniently taken down from the lower forming column 4, and demolding is very convenient.

Referring to fig. 6, in order to stably realize the sliding of the movable mold plate 2, a main guide post 13 is arranged on the fixed mold plate 1 at four corners of the fixed mold plate 1, the main guide post 13 is perpendicular to the fixed mold plate 1, one end of the main guide post 13 is fixed on the fixed mold plate 1, the other end of the main guide post sequentially penetrates through the molding plate 21 and the discharge plate 22, a main sleeve 211 matched with the main guide post 13 is arranged on the molding plate 21, the main sleeve 211 is embedded on the molding plate 21, a fixing part for fixing the molding plate 21 on the main guide post 13 after the upper molding post 12 slides out of the molding cavity 31 during demolding is arranged on the main guide post 13, the fixing part can fix the molding plate 21, and after the molding plate 21 slides in place, the discharge plate 22 slides relative to the molding plate 21, and the.

Referring to fig. 6 and 7, in order to fix the forming plate 21, the fixing member includes a main spring 131 sleeved on the main guide post 13, one end of the main spring 131 abuts against the fixed die plate 1, and the other end abuts against the forming plate 21, and both the fixed die plate 1 and the forming plate 21 are provided with a sinking groove 5 for accommodating the main spring 131, and when the die is closed, the main spring 131 is compressed in the sinking groove 5. A wedge block 61 and a mounting hole 6 for accommodating the wedge block 61 are arranged on the inner wall of the main sleeve 211 in a sliding manner along the radial direction of the main sleeve 211, the inclined surface of the wedge block 61 faces the fixed die plate 1, an elastic piece for driving the wedge block 61 to slide towards the main guide column 13 is arranged in the main sleeve 211, the elastic piece comprises a pressure spring 62 arranged in the mounting hole 6, the pressure spring 62 is always in a force accumulation state, the driving wedge block 61 is in contact with the main guide column 13, a positioning groove 132 matched with the wedge block 61 is arranged on the main guide column 13, the position of the positioning groove 132 is determined according to the position of the forming plate 21 to be fixed, after the upper forming column 12 is completely positioned outside the forming plate 21, the wedge block 61 slides to the position corresponding to the positioning groove 132, at this time, under the action of the pressure spring 62, the wedge block 61 is embedded into the positioning groove 132 to block the forming plate 21 from continuing sliding, in addition, because the inclined surface of the wedge block 61 faces the fixed die plate 1, the wedge block 61 can only achieve unidirectional limiting, the clamping of the molding plate 21 is not affected.

Referring to fig. 7, in order to reduce the wear of the wedge 61, a guide wheel engaged with the main guide post 13 may be rotatably connected to the end of the wedge 61, and the rotation direction of the guide wheel is tangential to the length direction of the main guide post 13, so that the contact area between the wedge 61 and the main guide post 13 may be reduced, and the friction between the wedge 61 and the main guide post 13 may be reduced.

Referring to fig. 4 and 6, in order to facilitate the sliding of the discharging plate 22, the discharging plate 22 includes a bottom plate 222 and a push plate 221 slidably disposed on the bottom plate 222, the bottom plate 222 is fixed to a movable platen on the injection molding machine, the sliding direction of the push plate 221 is the same as the sliding direction of the movable platen 2, secondary guide pillars 7 are disposed at four corners of the bottom plate 222 on the bottom plate 222, one end of each secondary guide pillar 7 is fixed to the bottom plate 222, the other end of each secondary guide pillar faces the molding plate 21, the secondary guide pillar 7 penetrates through the push plate 221 and is slidably connected to the molding plate 21, the secondary guide pillar 7 is disposed parallel to the primary guide pillar 13, the length of the primary guide pillar 13 can be effectively reduced by the secondary guide pillar 7, after the molding plate 21 is fixed, the discharging plate 22 needs to continuously slide, and at this time, the secondary guide pillar 7 can play a guiding role in continuously guiding the discharging plate 22 to slide.

Referring to fig. 5 and 6, in order to further facilitate the pen body 10 to fall off from the lower forming column 4, the lower forming column 4 is fixed on the bottom plate 222, the lower forming column 4 extends out after penetrating through the push plate 221, a through hole 2211 matched with the lower forming column 4 is arranged on the push plate 221, and a driving member for driving the push plate 221 to slide towards the forming plate 21 after the lower forming column 4 is drawn out of the forming cavity 31 is arranged on the bottom plate 222. After the bottom plate 222 slides in place, because the pushing plate 221 and the bottom plate 222 are connected in a sliding manner, under the driving of the driving element, the pushing plate 221 originally attached to the bottom plate 222 slides towards the forming plate 21, the pen body 10 on the lower forming column 4 is ejected out of the lower forming column 4, and the pen body 10 can fall out of the injection mold, so that the pen body 10 is discharged, and the demolding efficiency of the pen body 10 is further improved.

Referring to fig. 5 and 6, in order to facilitate the sliding of the push plate 221 after the bottom plate 222 is in place, the driving member includes an electromagnet 2221 embedded in the bottom plate 222, an attraction block 2212 is disposed on the push plate 221 corresponding to the electromagnet 2221, in order to ensure the attraction of the electromagnet 2221, a plurality of electromagnets 2221 may be disposed, so as to improve the fixing effect of the push plate 221, a secondary spring 71 is sleeved on the secondary guide post 7, the secondary spring 71 is disposed between the bottom plate 222 and the push plate 221, one end of the secondary spring 71 abuts against the bottom plate 222, the other end abuts against the push plate 221, and the mounting manner of the secondary spring 71 is similar to that of the primary spring 131. Under the normal state, electromagnet 2221 is powered on, electromagnet 2221 is matched with adsorption block 2212, the magnetic force generated by electromagnet 2221 overcomes the elastic force of secondary spring 71, push plate 221 is adsorbed on bottom plate 222, when electromagnet 2221 is powered off, secondary spring 71 can drive push plate 221 to slide towards forming plate 21, and push plate 221 can eject pen body 10 on lower forming column 4.

Referring to fig. 5 and 6, in order to stably realize the sliding of the discharging plate 22 and conveniently control the opening and closing of the electromagnet 2221, a secondary sleeve 8 matched with the secondary guide post 7 is arranged on the forming plate 21, a conductive strip 72 is arranged on the secondary guide post 7 along the length direction of the secondary guide post 7, the conductive strip 72 is embedded on the outer surface of the secondary guide post 7, a conductive block 81 matched with the conductive strip 72 is arranged on the inner wall of the secondary sleeve 8, the conductive strip 72 and the conductive block 81 are connected in series with the electromagnet 2221, when the dies are closed, the conductive block 81 is always contacted with the conductive strip 72, and at this time, the conductive strip 72 is mostly positioned on one side of the fixed die plate 1, when the forming plate 21 slides in place, the push plate 221 and the bottom plate 222 continue to slide to drive the forming sleeve 3 to slide outwards, at this time, the conductive block 81 is contacted with the conductive strip 72, and at this time, the electromagnet 2221 is still in an energized state, the pushing plate 221 and the bottom plate 222 are still attached to each other, when the lower forming column 4 slides out of the forming cavity 31, the conductive block 81 is staggered with the conductive strip 72, at this time, the electromagnet 2221 is powered off, the electromagnet 2221 releases the fixation of the pushing plate 221, the secondary spring 71 drives the pushing plate 221 to slide towards the forming plate 21, and the pen body 10 is ejected out of the lower forming column 4.

Referring to fig. 5, in order to improve the cooling rate in the injection molding process, a first cooling channel 212 is arranged on the molding plate 21 along the length direction of the molding plate 21, a cooling ring groove 213 is arranged outside the molding sleeve 3 in the molding plate 21, the width of the cooling ring groove 213 is smaller than the length of the molding sleeve 3, the first cooling channel 212 is communicated with the cooling ring groove 213, and during cooling, cooling water can surround the molding sleeve 3, so that the contact area is increased, the heat exchange speed is increased, and the cooling speed of the pen body 10 is effectively increased. In addition, the bottom plate 222 and the fixed die plate 1 are provided with the second cooling flow channel 9, the upper forming column 12 and the lower forming column 4 are internally provided with the counter bores 91 along the length direction thereof, the counter bores 91 are arranged at the axial positions of the upper forming column 12 and the lower forming column 4, the counter bores 91 are communicated with the corresponding second cooling flow channels 9, and after water flows through, cooling water can enter the counter bores 91, so that the pen body 10 can be cooled from the inner side and the outer side of the pen body 10, and the cooling efficiency of the pen body 10 is further improved.

The implementation principle of the embodiment is as follows: during demolding, the movable platen drives the discharging plate 22 to slide along the length direction of the main guide column 13 in the direction away from the fixed mold plate 1, under the action of the main spring 131, the forming plate 21 and the discharging plate 22 are attached and slide together, after the main forming sleeve 3 slides out of the forming cavity 31, the wedge block 61 is embedded into the positioning groove 132 on the main guide column 13, at the moment, the forming plate 21 cannot slide continuously, the discharging plate 22 slides continuously along the length direction of the secondary guide column 7 relative to the forming plate 21, after the pen body 10 is completely drawn out of the forming cavity 31 by the lower forming column 4 on the discharging plate 22, at the moment, the conductive block 81 and the conductive strip 72 are separated from each other, the electromagnet 2221 is powered off, the secondary spring 71 pushes out the pushing plate 221, the pushing plate 221 pushes out the pen body 10 on the lower forming column 4, and demolding of the pen body 10 is completed.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (8)

1. The utility model provides a cosmetic pencil body injection mold, including fixed die plate (1) and the movable mould board (2) of being connected that slide with fixed die plate (1) of fixed setting on the injection molding machine, be equipped with purt (11) on fixed die plate (1), its characterized in that: the movable die plate (2) comprises a discharge plate (22) and a forming plate (21) arranged between the discharge plate (22) and the fixed die plate (1), a forming cavity (31) communicated with the squirt nozzle (11) is formed in the forming plate (21), one end of the forming cavity (31) faces the fixed die plate (1), the other end of the forming cavity faces the discharge plate (22), an upper forming column (12) capable of extending into the forming cavity (31) is arranged on the fixed die plate (1), a lower forming column (4) capable of extending into the forming cavity (31) and abutting against the upper forming column (12) is arranged on the discharge plate (22), a plurality of convex ribs (42) are arranged on the outer surface circumference of the lower forming column (4) in an array mode, and the discharge plate (22) is arranged on the forming plate (21) in a sliding mode along the sliding direction of the movable die plate (2); main guide posts (13) are arranged at four corners of the fixed die plate (1) on the fixed die plate (1), the main guide posts (13) sequentially penetrate through the forming plate (21) and the discharging plate (22), and fixing parts for fixing the forming plate (21) on the main guide posts (13) after the upper forming posts (12) slide out of the forming cavities (31) during demolding are arranged on the main guide posts (13); the fixing piece comprises a main spring (131) sleeved on a main guide pillar (13), one end of the main spring (131) is abutted to a fixed die plate (1), the other end of the main spring is abutted to a forming plate (21), a main sleeve (211) matched with the main guide pillar (13) is arranged on the forming plate (21), a wedge block (61) is arranged on the inner wall of the main sleeve (211) in a sliding mode along the radial direction of the main sleeve (211), the inclined plane of the wedge block (61) faces the fixed die plate (1), an elastic piece for driving the wedge block (61) to slide towards the main guide pillar (13) is arranged in the main sleeve (211), a positioning groove (132) matched with the wedge block (61) is arranged on the main guide pillar (13), the end portion of the wedge block (61) is rotatably connected with a guide wheel matched with the main guide pillar (13), and the rotating direction of the guide wheel is tangent to the length direction of the main guide pillar (13).

2. The cosmetic pencil body injection mold of claim 1, wherein: go out flitch (22) including bottom plate (222) and slide push pedal (221) of setting on bottom plate (222), the slip direction of push pedal (221) is the same with movable mould board (2) slip direction, become post (4) to fix down on bottom plate (222), be equipped with on push pedal (221) with down become post (4) complex through hole (2211), be equipped with on bottom plate (222) and take out shaping chamber (31) back drive push pedal (221) towards the gliding driving piece of profiled sheeting (21) in shaping post (4) down.

3. The cosmetic pencil body injection mold of claim 2, wherein: the secondary guide posts (7) are arranged at the four corners of the bottom plate (222) on the bottom plate (222), the secondary guide posts (7) are arranged in parallel to the sliding direction of the movable die plate (2), and the secondary guide posts (7) are connected with the forming plate (21) in a sliding manner after penetrating through the push plate (221).

4. The cosmetic pencil body injection mold of claim 3, wherein: the driving piece comprises an electromagnet (2221) embedded on the bottom plate (222), an adsorption block (2212) is arranged on the push plate (221) corresponding to the electromagnet (2221), a secondary spring (71) is sleeved on the secondary guide post (7), one end of the secondary spring (71) is abutted against the bottom plate (222), and the other end of the secondary spring is abutted against the push plate (221).

5. The cosmetic pencil body injection mold of claim 4, wherein: a secondary sleeve (8) matched with the secondary guide post (7) is arranged on the forming plate (21), a conductive strip (72) is arranged on the secondary guide post (7) along the length direction of the secondary guide post (7), a conductive block (81) matched with the conductive strip (72) is arranged on the secondary sleeve (8), the conductive strip (72) and the conductive block (81) are connected with an electromagnet (2221) in series, and when the lower forming post (4) slides outwards, the conductive block (81) is contacted with the conductive strip (72); when the lower molding column (4) slides out of the molding cavity (31), the conductive block (81) is staggered with the conductive strip (72).

6. The cosmetic pencil body injection mold of claim 1, wherein: go up the shaping post (12) tip and be equipped with positioning convex block (121), be equipped with positioning groove (41) on the terminal surface of shaping post (12) towards last shaping post (4) down, the one end that becomes die cavity (31) and be close to fixed die plate (1) is equipped with guide pin bushing (32) with last shaping post (12) complex, be equipped with guiding gutter (321) that supply the raw materials to flow into in shaping cavity (31) on the guide pin bushing (32) inner wall.

7. The cosmetic pencil body injection mold of claim 1, wherein: be equipped with first cooling runner (212) along forming plate (21) length direction on forming plate (21), it is equipped with forming sleeve (3) to inlay on forming plate (21), shaping chamber (31) set up in forming sleeve (3), it is equipped with cooling ring groove (213) outward to lie in forming sleeve (3) in forming plate (21), first cooling runner (212) communicates with each other with cooling ring groove (213).

8. The cosmetic pencil body injection mold of claim 2, wherein: and second cooling flow channels (9) are arranged on the bottom plate (222) and the fixed die plate (1), counter bores (91) are arranged in the upper forming column (12) and the lower forming column (4) along the length direction of the upper forming column and the lower forming column, and the counter bores (91) are communicated with the corresponding second cooling flow channels (9).

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