CN111331912B - Powder prepressing and extruding integrated forming die and process - Google Patents
Powder prepressing and extruding integrated forming die and process Download PDFInfo
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- CN111331912B CN111331912B CN202010307295.2A CN202010307295A CN111331912B CN 111331912 B CN111331912 B CN 111331912B CN 202010307295 A CN202010307295 A CN 202010307295A CN 111331912 B CN111331912 B CN 111331912B
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- 239000000843 powder Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 238000001125 extrusion Methods 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 19
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000009704 powder extrusion Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/22—Extrusion presses; Dies therefor
- B30B11/26—Extrusion presses; Dies therefor using press rams
- B30B11/265—Extrusion presses; Dies therefor using press rams with precompression means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/22—Extrusion presses; Dies therefor
- B30B11/221—Extrusion presses; Dies therefor extrusion dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention discloses a powder prepressing and extruding integrated forming die and a process, wherein the forming die comprises an upper die assembly, a lower die plate and a cylinder body, wherein the cylinder body consists of an upper cylinder body and a lower cylinder body which are coaxial, and the upper cylinder body is connected with a cylinder body lifting driving mechanism and can move up and down; the bottom end of the lower cylinder body is fixed on the lower template, and an extrusion nozzle part is arranged on the side surface of the lower cylinder body; a hole corresponding to the central hole of the cylinder body is arranged in the middle of the hollow baffle; the two sides of the supporting plate are provided with horizontal guiding structures, and the horizontal guiding structures are provided with upper and lower elastic telescopic guiding mechanisms. According to the invention, through the optimized mold design, one device, one set of mold and one employee are adopted to replace the original technical scheme of two devices, two sets of molds and two employees, so that the mechanical properties such as the density and the flexural strength of the product are improved, the production period is shortened, and the production cost is reduced.
Description
Technical Field
The invention relates to a powder prepressing and extrusion integrated forming die and a process, which are used for extrusion forming processing of powder materials, have wide application fields and comprise various fields of application of metal materials and nonmetal materials.
Background
The existing powder extrusion molding generally adopts the following two modes:
1. The powder is directly extruded and molded through a die on a hydraulic press, and the defect is that the density is low, the molding is poor, and the flexural strength of the extruded material is low;
2. Two hydraulic presses, two sets of dies and two working procedures are adopted, one hydraulic press die is used for pre-compacting into bars or blocks, the density of materials is improved, and the other hydraulic press is used for extrusion molding. The method has the defects of low efficiency, increased operation area, high comprehensive cost of materials and appliances, and the like because two hydraulic presses, two sets of dies and two staff are required to operate.
Disclosure of Invention
The invention aims to provide a powder prepressing and extruding integrated forming die and a powder prepressing and extruding integrated forming process, so as to solve the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The powder prepressing and extruding integrated forming die comprises an upper die assembly, a lower die plate and a cylinder body, wherein the bottom end of the cylinder body is arranged on the lower die plate, an extruding nozzle part is arranged on the side surface of the bottom end of the cylinder body, the upper die assembly is arranged above the cylinder body and comprises an upper die at the lower end, the cylinder body consists of an upper cylinder body and a lower cylinder body which are coaxial, the upper cylinder body and the lower cylinder body are provided with central holes with the same inner diameter, and the upper cylinder body is connected with a cylinder body lifting driving mechanism and can move up and down; the bottom end of the lower cylinder body is fixed on the lower template, and the extrusion nozzle component is arranged on the side surface of the lower cylinder body; a supporting plate capable of moving left and right is arranged between the upper cylinder body and the lower cylinder body, a solid baffle plate and a hollow baffle plate are arranged on the supporting plate, and a hole corresponding to the central hole of the cylinder body is arranged in the middle of the hollow baffle plate; the two sides of the supporting plate are provided with horizontal guiding structures, and the horizontal guiding structures are provided with upper and lower elastic telescopic guiding mechanisms.
As a preferred embodiment of the present invention, the upper die assembly includes an upper fixing plate, an upper die connecting rod, and the upper die, the upper end of the upper die is connected to the lower end of the upper die connecting rod, and the upper end of the upper die connecting rod is connected to the upper fixing plate; the upper surface of the upper fixing plate is used for being connected with an upper die driving device of the hydraulic machine.
As a preferred specific embodiment of the invention, the cylinder lifting driving mechanism comprises an upper template, a top pull rod, a drag hook, a pull pin, a top oil cylinder piston rod connecting end, an upper cylinder lifting guiding mechanism and a driving plate, wherein the periphery of the upper cylinder is connected with the upper template, the upper template is slidably arranged on a plurality of upper cylinder lifting guiding mechanisms, and the bottom end of the upper cylinder lifting guiding mechanism is connected with the upper surface of the lower template; the upper die plate is connected with the upper part of the push-pull rod, the bottom end of the push-pull rod slides through the through hole of the lower die plate and is connected with the lower driving plate, the middle part below the driving plate is connected with a drag hook, a pull pin is arranged in the mouth of the drag hook, and the lower end of the pull pin is provided with a piston rod connecting end of an ejection cylinder.
As a preferred specific embodiment of the invention, the top end of the top pull rod slides through the through hole of the upper die plate, a limit boss is arranged on the top pull rod below the upper die plate, a spiral compression spring is sleeved on the top pull rod above the upper die plate, a gasket is arranged at the top end of the spiral compression spring, and the spiral compression spring is connected with the top pull rod through a nut.
As a preferred embodiment of the present invention, a stopper is provided at the lower part of the top pull rod, and the stopper is fixed on the lower die plate; the top end of the stop block extends to the upper surface of the supporting plate; the stop block is provided with a through hole, and the top pull rod slides through the through hole.
As a preferred specific embodiment of the invention, the upper surface of the driving plate is provided with an inner ejector rod, and the upper end of the inner ejector rod slides through a through hole arranged on the wall of the lower cylinder body and corresponds to the bottom surfaces of the solid baffle plate and the hollow baffle plate; the height of the inner ejector rod is slightly larger than the sum of the heights of the lower template and the lower cylinder body.
As a preferred specific embodiment of the invention, the periphery of the upper cylinder body is provided with a groove, and the upper cylinder body is fixedly connected with the upper template through a pressing block arranged in the groove.
As a preferred embodiment of the present invention, one end of the supporting plate is connected with the connecting plate through a hexagon socket head cap screw, and the connecting plate is used for being connected with a piston rod of the hydraulic cylinder; the horizontal guide structures on two sides of the supporting plate comprise guide posts and annular guide grooves arranged on the top of the guide posts, a plurality of guide posts are arranged at positions corresponding to the two sides of the supporting plate, and the two sides of the supporting plate are slidably arranged in the annular guide grooves of the guide posts; each guide post is connected to the lower template through the upper and lower elastic telescopic guide mechanisms, each upper and lower elastic telescopic guide mechanism comprises a spring and a guide sleeve, the bottom of each guide sleeve is fixed on the lower template, the lower part of each guide post is slidably mounted in a shrinkage mouth at the top end of each guide sleeve, and the bottom end of each guide post is provided with a spring.
The invention further provides a molding process adopting the powder prepressing and extrusion integrated molding die, which comprises the following steps:
(1) Mold operation preparation start state: the upper die assembly is located at a high position, and the solid baffle is located between the upper cylinder body and the lower cylinder body and is mutually pressed.
(2) Prepressing: adding powder material into an upper cylinder, moving an upper die assembly downwards, and prepressing the powder material in the upper cylinder by an upper die;
(3) The upper die assembly retreats to the upper end starting position;
(4) The upper cylinder body ascends and is separated from the solid baffle;
(5) The supporting plate, the solid baffle and the hollow baffle are sprung upwards under the action of the upper elastic telescopic guide mechanism and the lower elastic telescopic guide mechanism, and the supporting plate is pushed by the transverse push-pull oil cylinder to move downwards and leftwards so as to move the hollow baffle between the upper cylinder body and the lower cylinder body;
(6) The upper cylinder body moves downwards to tightly press the hollow baffle plate of the upper cylinder body and the lower cylinder body;
(7) The upper die assembly descends, the upper die applies pressure downwards to the pre-pressed powder material in the upper cylinder body, and the powder material is extruded and molded through the hollow baffle, the lower cylinder body and the extrusion nozzle part in sequence;
(8) The upper module returns to the initial position;
(9) The upper cylinder body is lifted and reset and separated from the hollow baffle;
(10) The supporting plate and the solid baffle plate and the hollow baffle plate are sprung upwards under the action of the upper elastic telescopic guide mechanism and the lower elastic telescopic guide mechanism, and the supporting plate is pushed by the transverse push-pull oil cylinder to move rightwards, so that the positions of the solid baffle plate and the positions of the hollow baffle plate are interchanged, and a circulation operation is completed.
The invention has the advantages that:
1. the equipment investment is reduced: the PLC control system of the equipment is combined, only a small push-pull oil cylinder is added in the aspect of the equipment, the cost of a die is added, and the cost is close to 10% of the input of a hydraulic machine.
2. The operation efficiency is improved by 80 percent: one procedure is reduced, the processing time, the carrying waiting time and the like of the procedure are related, the working time is comprehensively reduced, and the efficiency is improved.
3. The power consumption in the processing cost is reduced by 40 percent.
4. The area of the working field is reduced by 50%, and the investment of the turnover appliances is reduced by 50%.
5. The labor cost is reduced by about 40 percent.
6. The defective rate is reduced by 60 percent. Because the prepressing and extrusion molding are performed in one process, various problems encountered in the prepressing can be immediately found and adjusted in time. In the prior art, when the density is abnormal in two working procedures, extrusion molding is performed, the pre-pressing working procedure is finished, and the re-working can be only performed.
Drawings
FIG. 1 is a schematic diagram of the overall cross-sectional structure of the mold of the present invention (section D-D of FIG. 2, without stop 18 and top tie rod 24);
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 2 (rotated 90 counterclockwise);
FIG. 4 is a cross-sectional view of C-C of FIG. 1;
fig. 5-14 are schematic diagrams of the molding process of the present invention.
Reference numerals illustrate: 1. upper fixed plate, 2, upper die connecting rod, 3, upper die, 4, upper cylinder, 5, briquetting, 6, hexagon socket head cap screw, 7, upper die plate, 8, solid baffle, 9, pallet, 10, hollow baffle, 11, hexagon socket head cap screw, 12, connecting plate, 13, hexagon socket head cap screw, 14, hydraulic cylinder piston rod, 15, hexagon socket head cap screw, 16, lower cylinder, 161, (lower cylinder bottom) inclined plane, 17, extrusion nozzle member, 18, stopper, 19, hexagon socket head cap screw, 20, inner ram, 21, gasket, 22, hexagonal nut, 23, helical compression spring, 24, ejector pin, 241, limit boss, 25, lower die plate, 26, lower pad, 27, hexagon socket head cap screw, 28, drag hook, 29, pull pin, 30, ejector cylinder piston rod connecting end, 31, guide post, 311, guide groove, 32, spring, 33, guide bush, 34, screw, 35, hexagon socket head screw, 36, cylindrical pin, 38, upper cylinder lifting guide plate, 39, powder driving material.
Detailed Description
Referring to fig. 1-4, the powder prepressing and extruding integrated forming die comprises an upper die assembly, a lower die plate 25 and a cylinder body, wherein the bottom end of the cylinder body is arranged on the lower die plate 25, an extruding nozzle part 17 is arranged on the side surface of the bottom end of the cylinder body, an upper die assembly is arranged above the cylinder body, and the upper die assembly comprises an upper die 3 at the lower end, and the powder prepressing and extruding integrated forming die is characterized in that the cylinder body consists of an upper cylinder body 4 and a lower cylinder body 16 which are coaxial, the upper cylinder body 4 and the lower cylinder body 16 are provided with central holes with the same inner diameter, and the upper cylinder body 4 is connected with a cylinder body lifting driving mechanism and can move up and down; the bottom end of the lower cylinder 16 is fixed on the upper surface of the lower template 25, and the extrusion nozzle part 17 is arranged on the side surface of the lower cylinder 16; a supporting plate 9 capable of moving left and right is arranged between the upper cylinder body 4 and the lower cylinder body 16, a solid baffle 8 and a hollow baffle 10 are arranged on the supporting plate 9, and a hole corresponding to the central hole of the cylinder body is arranged in the middle of the hollow baffle 10; the two sides of the supporting plate 9 are provided with horizontal guiding structures, and the horizontal guiding structures are provided with upper and lower elastic telescopic guiding mechanisms.
The upper die assembly comprises an upper fixing plate 1, an upper die connecting rod 2 and an upper die 3, wherein the upper end of the upper die 3 is connected with the lower end of the upper die connecting rod 2, and the upper end of the upper die connecting rod 2 is connected with the upper fixing plate 1; the upper surface of the upper fixing plate 1 is connected with the upper die driving device (oil cylinder).
The cylinder lifting driving mechanism comprises: the upper die plate 7, the top pull rod 24, the drag hook 28, the pull pin 29, the ejection cylinder piston rod connecting end 30, the upper cylinder body lifting guide mechanism 38 and the driving plate 39, wherein the periphery of the upper cylinder body 4 is connected with the upper die plate 7, the upper die plate 7 is slidably arranged on the plurality of upper cylinder body lifting guide mechanisms 38, and the bottom end of the upper cylinder body lifting guide mechanism 38 is connected with the upper surface of the lower die plate 25; the upper die plate 7 is connected with the upper part of the top pull rod 24, the bottom end of the top pull rod 24 slides through a through hole of the lower die plate 25 and is connected with a lower driving plate 39, a draw hook 28 is connected with the middle part below the driving plate 39, a pull pin 29 is arranged in a mouth of the draw hook 28, and an ejection cylinder piston rod connecting end 30 is arranged at the lower end of the pull pin 29. The upper cylinder lifting guide mechanism 38 comprises independent guide posts and guide sleeve assemblies, is a standard component commonly used for a die, and is positioned at four corners of the die in total. The upper and lower ends of the upper cylinder lifting guide mechanism 38 are fixed to the upper die plate 7 and the lower die plate 25 by socket head cap screws 35 and cylindrical pins 36.
The top end of the top pull rod 24 slides through the through hole of the upper die plate 7, a limit boss 241 is arranged on the top pull rod 24 below the upper die plate 7, a spiral compression spring 23 is sleeved on the top pull rod 24 above the upper die plate 7, a gasket 21 is arranged at the top end of the spiral compression spring 23, and the spiral compression spring is connected with the top pull rod 24 through a nut 22.
A stopper 18 is provided at the bottom of the push rod 24, the stopper 18 is fixed to the lower die plate 25 by a hexagon socket head cap screw 19, a through hole is provided in the stopper 18, and the push rod 24 slides through the through hole. The top ends of the two side stops 18 (in the shape of a "") extend opposite to the top of the pallet 9. The stopper 18 directly acts on the solid baffle 8 or the hollow baffle 10 to separate the solid baffle 8 or the hollow baffle 10 from the upper cylinder 4, and the guide post 31 can also separate the solid baffle 8 or the hollow baffle 10 from the upper cylinder 4 through the supporting plate 9, but the required separation force is large after compacting the P powder material according to the upper die 3, the upper cylinder 4 and the solid baffle 8, and damage to the guide post 31 and the supporting plate 9 can be caused.
An inner ejector rod 20 is arranged on the driving plate 39, the upper end of the inner ejector rod 20 slides through a through hole arranged on the wall of the lower cylinder body 16 and corresponds to the bottom surfaces of the solid baffle plate 8 and the hollow baffle plate 10, and the height of the inner ejector rod 20 is larger than the sum of the heights of the lower template 25 and the lower cylinder body 16 by 1mm. The function of the inner carrier rod 20 is: when the driving plate 39 moves upwards to be attached to the lower template 25, the inner ejector rod 20 jacks up the solid baffle 8 or the hollow baffle 10 to be separated from the lower cylinder 16, after separation, the guide post 31, the spring 32 and the guide sleeve 33 control the supporting plate 9 to continuously float upwards until the lower end face of the protruding part of the solid baffle 8 or the hollow baffle 10 and the stop block 18 is close to 0.2mm (the upper and lower movable range of the supporting plate 9 in the groove of the guide post is 0.5 mm), meanwhile, the guide post 31 floats upwards to the maximum position under the jacking and limiting of the spring 32 and the guide sleeve 33, and at the moment, the supporting plate 9 can horizontally move to the exchange position with the solid baffle 8 or the hollow baffle 10 within the limited range of the guide post 31.
The periphery of the upper cylinder body 4 is provided with a groove, and the upper cylinder body is fixedly connected with an upper template 7 through a pressing block 5 and an inner hexagonal cylindrical head screw 6 which are arranged in the groove.
One end of the supporting plate 9 is connected with a connecting plate 12 through a hexagon socket head cap screw, and is used for being connected with a hydraulic cylinder piston rod 14.
The horizontal guiding structure on two sides of the supporting plate 9 comprises guiding columns 31 and annular guiding grooves 311 arranged at the top of the guiding columns 31, a plurality of guiding columns 31 are arranged at positions corresponding to the two sides of the supporting plate 9, and the two sides of the supporting plate 9 are arranged in the annular guiding grooves 311 of the plurality of guiding columns 31 in a sliding manner; each guide column 31 is connected to the lower die plate 25 through the upper and lower elastic telescopic guide mechanisms, each upper and lower elastic telescopic guide mechanism comprises a spring 32, a guide sleeve 33 and a screw 34, the bottom of the guide sleeve 33 is fixed on the lower die plate 25 through the screw 34, the lower part of the guide column 31 is slidably mounted in a shrinkage mouth at the top end of the guide sleeve 33, and the bottom end of the guide column 31 is provided with the spring 32.
The die of the invention is applied to a hydraulic press, namely: the upper surface of the upper die assembly is connected with a driving oil cylinder for driving the upper die assembly to move up and down; the connection end 30 of the ejection cylinder piston rod at the lower end of the die is connected with the ejection cylinder piston rod and is used for driving the upper cylinder body 4 and accessories thereof to move up and down; the right end of the supporting plate 9 is connected with a hydraulic cylinder piston rod 14 for driving the supporting plate 9, the solid baffle plate 8 and the hollow baffle plate 10 to move left and right.
Referring to fig. 5 to 14, the molding process (working process) of the powder pre-pressing and extruding integrated molding die comprises the following steps:
(1) Initial state of the mold: the upper die assembly is in the high position and the solid baffle 8 is positioned between the upper cylinder 4 and the lower cylinder 16 and is compressed against each other (as shown in fig. 5).
(2) Prepressing: powder material P is added into the upper cylinder 4, the upper die assembly moves downwards, and the upper die 3 pre-presses the powder material P in the upper cylinder 4 (as shown in figure 6).
(3) The upper die assembly is retracted to the upper start position (as shown in fig. 7).
(4) The upper cylinder 4 is lifted up and separated from the solid baffle 8 (as shown in fig. 8).
(5) The supporting plate 9 together with the solid baffle plate 8 and the hollow baffle plate 10 are sprung upwards under the action of the upper and lower elastic telescopic guide mechanisms, and the supporting plate 9 is pushed by the transverse push-pull oil cylinder 14 to move downwards and leftwards so as to move the hollow baffle plate 10 between the upper cylinder body 4 and the lower cylinder body 16 (shown in figure 9).
(6) The upper cylinder 4 moves downward to compress the upper cylinder 4, the hollow baffle 10 and the lower cylinder 16 (as shown in fig. 10).
(7) The upper die assembly descends, the upper die 3 applies downward pressure to the pre-pressed powder material in the upper cylinder 4, and the powder material is extruded and molded through the hollow baffle 10, the lower cylinder 16 and the extrusion nozzle 17 in sequence (as shown in fig. 11).
(8) The upper die assembly is raised back to the start position (as shown in fig. 12).
(9) The upper cylinder body 4 is lifted and reset and separated from the hollow baffle 10 (shown in fig. 13).
(10) The supporting plate 9 together with the solid baffle 8 and the hollow baffle 10 are sprung upwards under the action of the upper and lower elastic telescopic guide mechanisms, the supporting plate 9 is pushed by the transverse push-pull oil cylinder 14 to move downwards and rightwards, the positions of the solid baffle 8 and the hollow baffle 10 are interchanged, and one cycle operation is completed (as shown in figure 14).
According to the invention, through the optimized mold design, one device, one set of mold and one employee are adopted to replace the original technical scheme of two devices, two sets of molds and two employees, so that the mechanical properties such as the density and the flexural strength of the product are improved, the production period is shortened, and the production cost is reduced.
Claims (5)
1. The powder prepressing and extruding integrated forming die comprises an upper die assembly, a lower die plate (25) and a cylinder body, wherein the bottom end of the cylinder body is arranged on the lower die plate (25), an extruding nozzle part (17) is arranged on the side surface of the bottom end of the cylinder body, the upper die assembly is arranged above the cylinder body and comprises an upper die (3), and the powder prepressing and extruding integrated forming die is characterized in that the cylinder body consists of an upper cylinder body (4) and a lower cylinder body (16) which are coaxial, the upper cylinder body (4) and the lower cylinder body (16) are provided with central holes with the same inner diameter, and the upper cylinder body (4) is connected with a cylinder body lifting driving mechanism and can move up and down; the bottom end of the lower cylinder body (16) is fixed on the upper surface of the lower template (25), and the extrusion nozzle component (17) is arranged on the side surface of the lower cylinder body (16); a supporting plate (9) capable of moving left and right is arranged between the upper cylinder body (4) and the lower cylinder body (16), a solid baffle (8) and a hollow baffle (10) are arranged on the supporting plate (9), and a hole corresponding to the central hole of the cylinder body is arranged in the middle of the hollow baffle (10); two sides of the supporting plate (9) are provided with horizontal guiding structures, and the horizontal guiding structures are provided with upper and lower elastic telescopic guiding mechanisms;
The cylinder body lifting driving mechanism comprises an upper die plate (7), a top pull rod (24), a drag hook (28), a pull pin (29), a push-out cylinder piston rod connecting end (30), an upper cylinder body lifting guiding mechanism (38) and a driving plate (39), wherein the periphery of the upper cylinder body (4) is connected with the upper die plate (7), the upper die plate (7) is slidably arranged on a plurality of upper cylinder body lifting guiding mechanisms (38), and the bottom end of the upper cylinder body lifting guiding mechanism (38) is connected with the upper surface of the lower die plate (25); the upper die plate (7) is connected with the upper part of a top pull rod (24), the bottom end of the top pull rod (24) passes through a through hole of a lower die plate (25) in a sliding way and is connected with a lower driving plate (39), a draw hook (28) is connected to the middle part below the driving plate (39), a pull pin (29) is arranged in a mouth of the draw hook (28), and a piston rod connecting end (30) of an ejection cylinder is arranged at the lower end of the pull pin (29);
The top end of the top pull rod (24) slides through the through hole of the upper die plate (7), a limit boss (241) is arranged on the top pull rod (24) below the upper die plate (7), a spiral compression spring (23) is sleeved on the top pull rod (24) above the upper die plate (7), a gasket (21) is arranged at the top end of the spiral compression spring (23), and the spiral compression spring is connected with the top pull rod (24) through a nut (22);
An inner ejector rod (20) is arranged on the driving plate (39), and the upper end of the inner ejector rod (20) slides through a through hole arranged on the wall of the lower cylinder body (16) and corresponds to the bottom surfaces of the solid baffle plate (8) and the hollow baffle plate (10); the height of the inner ejector rod (20) is slightly larger than the sum of the heights of the lower template (25) and the lower cylinder body (16);
The periphery of the upper cylinder body (4) is provided with a groove, and the upper cylinder body is fixedly connected with the upper template (7) through a pressing block (5) arranged in the groove;
The horizontal guide structures on two sides of the supporting plate (9) comprise guide posts (31) and annular guide grooves (311) arranged at the top of the guide posts, the guide posts (31) are arranged at positions corresponding to the two sides of the supporting plate (9), and the two sides of the supporting plate (9) are slidably arranged in the annular guide grooves (311) of the guide posts (31); each guide column (31) is connected to the lower die plate (25) through the upper and lower elastic telescopic guide mechanisms, each upper and lower elastic telescopic guide mechanism comprises a spring (32) and a guide sleeve (33), the bottom of each guide sleeve (33) is fixed to the lower die plate (25), the lower portion of each guide column (31) is slidably mounted in a necking at the top end of each guide sleeve (33), and the bottom end of each guide column (31) is provided with the spring (32).
2. The powder prepressing and extruding integrated forming die according to claim 1, characterized in that the upper die assembly comprises an upper fixing plate (1), an upper die connecting rod (2) and the upper die (3), the upper end of the upper die (3) is connected with the lower end of the upper die connecting rod (2), and the upper end of the upper die connecting rod (2) is connected with the upper fixing plate (1); the upper surface of the upper fixing plate (1) is used for being connected with an upper die driving device of the hydraulic press.
3. The powder pre-pressing and extruding integrated mold according to claim 1, wherein a stopper (18) is provided at the lower part of the top tie rod (24), and the stopper (18) is fixed on the lower die plate (25); the top end of the stop block (18) extends to the upper surface of the supporting plate (9); the stopper (18) is provided with a through hole through which the push-pull rod (24) slides.
4. The powder pre-pressing and extruding integrated forming die according to claim 1, wherein one end of the supporting plate (9) is connected with a connecting plate (12) through a hexagon socket head cap screw, and the connecting plate (12) is used for being connected with a hydraulic cylinder piston rod (14).
5. A molding process using the powder prepressing and extruding integrated molding die as claimed in claim 1, comprising the steps of:
1) Mold operation preparation start state: the upper die assembly is positioned at a high position, and the solid baffle (8) is positioned between the upper cylinder body (4) and the lower cylinder body (16) and is mutually pressed;
2) And (3) prepressing: powder material is added into the upper cylinder body (4), the upper die assembly moves downwards, and the upper die (3) pre-presses the powder material in the upper cylinder body (4);
3) The upper die assembly retreats to the upper end starting position;
4) The upper cylinder body (4) ascends and is separated from the solid baffle plate (8);
5) The supporting plate (9) together with the solid baffle (8) and the hollow baffle (10) are sprung upwards under the action of the upper elastic telescopic guide mechanism and the lower elastic telescopic guide mechanism, the supporting plate (9) is pushed by a piston rod (14) of the hydraulic cylinder to move leftwards, and the hollow baffle (10) is moved between the upper cylinder body (4) and the lower cylinder body (16);
6) The upper cylinder body (4) moves downwards to compress the hollow baffle (10) of the upper cylinder body (4) and the lower cylinder body (16);
7) The upper die assembly descends, the upper die (3) applies pressure downwards to the pre-pressed powder material in the upper cylinder body (4), and the powder material is extruded and molded through the hollow baffle (10), the lower cylinder body (16) and the extrusion nozzle component (17) in sequence;
8) The upper die assembly returns to the initial position;
9) The upper cylinder body (4) is lifted and reset and separated from the hollow baffle (10);
10 The supporting plate (9) together with the solid baffle plate (8) and the hollow baffle plate (10) are sprung upwards under the action of the upper elastic telescopic guide mechanism and the lower elastic telescopic guide mechanism, the supporting plate (9) is pushed by a piston rod (14) of the hydraulic cylinder to move rightwards, and the positions of the solid baffle plate (8) and the hollow baffle plate (10) are interchanged to finish a circulation operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307295.2A CN111331912B (en) | 2020-04-17 | 2020-04-17 | Powder prepressing and extruding integrated forming die and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307295.2A CN111331912B (en) | 2020-04-17 | 2020-04-17 | Powder prepressing and extruding integrated forming die and process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111331912A CN111331912A (en) | 2020-06-26 |
| CN111331912B true CN111331912B (en) | 2024-08-13 |
Family
ID=71178856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202010307295.2A Active CN111331912B (en) | 2020-04-17 | 2020-04-17 | Powder prepressing and extruding integrated forming die and process |
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