CN116871390A - A forward and reverse stretching mold and its stretching method - Google Patents
A forward and reverse stretching mold and its stretching method Download PDFInfo
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- CN116871390A CN116871390A CN202310834066.XA CN202310834066A CN116871390A CN 116871390 A CN116871390 A CN 116871390A CN 202310834066 A CN202310834066 A CN 202310834066A CN 116871390 A CN116871390 A CN 116871390A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/24—Deep-drawing involving two drawing operations having effects in opposite directions with respect to the blank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
- B21D45/04—Ejecting devices interrelated with motion of tool
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- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
本发明涉及模具行业的机械结构技术，尤其涉及应用于带帽沿的圆筒状小型产品的正反向拉伸模具及拉伸方法。该模具从上到下依次包括上模座、上模、下模和下模座，在下模上设有正向拉伸工位、反向拉伸工位和卸料工位；在垂直正对正向拉伸工位、反向拉伸工位的上模和下模上均设有拉伸通道；在上模且垂直正对正向拉伸工位的拉伸通道内设有上正向拉伸结构，在下模且垂直正对正向拉伸工位的拉伸通道内设有下正向拉伸结构；在上模且垂直正对反向拉伸工位的拉伸通道内设有上反向拉伸结构，在下模且垂直正对反向拉伸工位的拉伸通道内设有下反向拉伸结构；所述的正向拉伸工位侧边设有下模推杆结构。本发明降低了模具制造成本、降低拉伸原材料成本。
The present invention relates to mechanical structure technology in the mold industry, and in particular to forward and reverse stretching molds and stretching methods applied to small cylindrical products with brim. The mold includes an upper mold base, an upper mold, a lower mold and a lower mold base in sequence from top to bottom. The lower mold is equipped with a forward stretching station, a reverse stretching station and a discharge station; There are stretching channels on the upper mold and lower mold of the forward stretching station and the reverse stretching station; there is an upper forward stretching channel in the upper mold and vertically facing the forward stretching station. A stretching structure is provided in the stretching channel of the lower mold and vertically facing the forward stretching station; a lower forward stretching structure is provided in the stretching channel of the upper mold and vertically facing the reverse stretching station. There is an upper reverse stretching structure, and a lower reverse stretching structure is provided in the stretching channel of the lower mold and vertically facing the reverse stretching station; a lower mold push rod is provided on the side of the forward stretching station. structure. The invention reduces the mold manufacturing cost and the drawing raw material cost.
Description
Technical Field
The invention relates to a mechanical structure technology in the mould industry, in particular to a forward and reverse stretching mould and a stretching method applied to a cylindrical small product with a cap edge.
Background
The existing reverse stretching die comprises a male die, a material pressing plate, a female die, a top block and a top rod, wherein the female die is arranged below the male die, the female die is provided with a hole corresponding to the male die, the top block is arranged in the hole and is arranged corresponding to the male die, the top rod is arranged below the top block, and the material pressing plate is arranged between the male die and the female die. The male die and the top block in the female die cooperate to work during stretching operation, so that the stretching process is stable. With the development of individuation and miniaturization of products, a product needs working procedures of forward stretching, reverse stretching and the like from raw materials to final products, the standard structure of the conventional universal die adopts continuous die stretching, the width of a material belt can be narrowed during stretching, the steps of a front station and a rear station can be changed after stretching, and accordingly stability of product quality is affected. However, the corresponding material belts and steps are increased, the material belts are excessively overlapped, and raw materials are wasted. In addition, because of continuous stretching, a plurality of stations are needed to finally output the product, the more stations are, the more finished products are correspondingly increased, the step-by-step inspection is needed during maintenance, and the maintenance cost is high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a forward and reverse stretching die with few die stations and low production cost and a stretching method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is that a forward and reverse stretching die comprises an upper die holder, an upper die, a lower die and a lower die holder from top to bottom, wherein the lower die is provided with a forward stretching station, a reverse stretching station and a discharging station; the upper die and the lower die which are vertically opposite to the forward stretching station and the reverse stretching station are respectively provided with a stretching channel; an upper forward stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the forward stretching station, and a lower forward stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the forward stretching station; an upper reverse stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the reverse stretching station, and a lower reverse stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the reverse stretching station; the side of the forward stretching station is provided with a lower die push rod structure, the lower die push rod structure comprises a lower die push rod for pushing a product, and the upper die is also provided with an upper die insert knife for clamping/releasing the lower die push rod to advance. And the unloading station is provided with an unloading structure.
Further: in the forward and reverse stretching die, the upper forward stretching structure comprises a cylindrical upper stripping block and an upper die cutting material punching and pressing block which are sequentially sleeved on the upper stripping block. The lower forward stretching structure comprises a lower die stretching punch head, a lower stripping block and a lower knife edge which are sequentially sleeved on the lower die stretching punch head.
The upper reverse stretching structure comprises a cylindrical upper die stretching punch and an upper stripping sleeve sleeved on the upper die stretching punch. The lower reverse stretching structure comprises a cylindrical lower stripping block and a lower forming block sleeved on the lower stripping block.
The lower die push rod structure also comprises a lower die push rod fixing block and a lower die push rod guide rail.
The discharging structure comprises a downhill discharging plate.
The bottom of the upper die slotting tool is provided with a slotting tool inclined plane, and the front end of the lower die push rod fixing block is provided with a front end inclined plane matched with the slotting tool inclined plane. The slotting tool inclined plane is matched with the front end inclined plane, when the film is closed, the slotting tool inclined plane props against the front end inclined plane, so that the lower die push rod is fixed in the horizontal direction, when the film is opened, the slotting tool inclined plane gradually rises, the lower die push rod fixing block gradually moves forwards in the horizontal direction, and the products are pushed to move forwards one by one to a station. When the push rod fixing block is pressed down along with the upper die, the inclined surface of the upper die slotting tool gradually contacts with the inclined surface of the push rod fixing block, and the push rod fixing block and the lower die push rod move backwards in the horizontal direction together by pressure, so that the lower die push rod gradually withdraws to the periphery of the material belt.
And the top ends of the upper forward stretching structure, the lower forward stretching structure, the upper reverse stretching structure and the lower reverse stretching structure are all connected with a power spring.
An upper cover plate is further arranged on the top of the upper die holder, and a channel communicated with the upper die holder stretching channel is also arranged on the upper cover plate.
Further: the invention also provides a stretching method of the forward and reverse stretching die, which comprises the following steps:
s1: the punch drives the upper die to press downwards, and the upper die slotting tool enters holes on two sides of the push rod fixing block of the lower die in advance; the push rod of the lower die is gradually withdrawn from the periphery of the material belt along with the push rod fixing block, so that the push rod is prevented from being pressed to the material belt to deform;
s2: the upper die continues to run downwards, when the feeding belt continuously reaches a forward stretching station along with the feeding machine, the upper die cutting punch and the lower knife edge are matched for punching and separating out original products, the lower die stretching punch enters the inner side of the upper die cutting punch for upward forward stretching action of the products, after stretching is finished, the upper die runs upwards for opening the die, the upper stripping block ejects a stretched semi-finished product out of the inner side of the upper die cutting punch, and the lower stripping block ejects the stretched semi-finished product out of the lower die surface;
s3, the upper die slotting tool moves upwards, the lower die pushing rod moves forwards, and the stretching semi-finished product on the forward stretching station is pushed to the inner side of the lower molding block of the reverse stretching station; the upward movement of the upper die insert is also the result of the upward movement of the die driven by the rotation of the crankshaft of the punch.
S4: the punch drives the upper die to run downwards again, the forward stretching station continues to step S2, and the upper die stretches the punch to press the stretched semi-finished product into the inner side of the lower molding block of the lower die for reverse stretching at the reverse stretching station;
s5: after the reverse stretching is finished, the upper die moves upwards to open the die, the upper stripping sleeve ejects a stretched product out of the upper die to stretch the punch, the lower stripping block of the lower die ejects the product out of the lower die surface, then the lower die push rod moves forwards along with the upward movement of the upper die slotting tool, and the semi-finished product stretched by the forward stretching station is continuously pushed to the inner side of the lower forming block of the reverse stretching station; and the stretching semi-finished product also pushes the stretching finished product of the reverse stretching station onto a discharging plate in front of the die, and the product smoothly slides out of the die.
Compared with the prior art, the forward and reverse stretching die comprises an upper die holder, an upper die, a lower die and a lower die holder from top to bottom, wherein the lower die is provided with a forward stretching station, a reverse stretching station and a discharging station; the upper die and the lower die which are vertically opposite to the forward stretching station and the reverse stretching station are respectively provided with a stretching channel; an upper forward stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the forward stretching station, and a lower forward stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the forward stretching station; an upper reverse stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the reverse stretching station, and a lower reverse stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the reverse stretching station; the side of the forward stretching station is provided with a lower die push rod structure, the lower die push rod structure comprises a lower die push rod for pushing a product, and the upper die is also provided with an upper die insert knife for clamping/releasing the lower die push rod to advance. And the unloading station is provided with an unloading structure. Compared with the improved die in the prior art, the die has a relatively simple structure, greatly reduces the manufacturing cost, the production cost and the maintenance cost of the die, and can properly improve the production capacity and the efficiency, greatly saves the loss of raw materials because the raw materials are less in lapping, and can reduce the cost of the raw materials by about 20% for each finished product.
Drawings
FIG. 1 is a schematic view of a longitudinal section of a drawing die when the die is closed according to an embodiment;
FIG. 2 is a schematic view of a longitudinal section of a drawing die when the die is opened according to the first embodiment;
FIG. 3 is a schematic diagram of a drawing die when a lower film pusher exits the periphery of a feed belt after closing the die;
FIG. 4 is a schematic view of a longitudinal section of a drawing die when the die is closed in the second embodiment;
FIG. 5 is a schematic view of a longitudinal section of a drawing die at the time of die opening in the second embodiment;
FIG. 6 is a schematic diagram of a drawing die when the lower film pusher of the second embodiment exits the periphery of the feed belt after closing the die;
the device comprises an upper die holder 1, an upper die 2, a lower die 3, a lower die holder 4, a lower die push rod 5, an upper die slotting tool 6, an upper stripping block 7, an upper die cutting punch 8, a pressing block 9, a lower die stretching punch 10, a lower stripping block A11, a lower knife edge 12, an upper die stretching punch 13, an upper stripping sleeve 14, a lower stripping block B15, a lower forming block 16, a lower die push rod fixing block 17, a lower die push rod guide rail 18, a discharging plate 19, a slotting tool inclined plane 20, a front end inclined plane 21, a power spring 22, an upper cover plate 23, a semi-finished product after forward stretching 24, a finished product after reverse stretching 25 and a feeding belt 26.
Detailed Description
The invention aims to combine the existing mould stations, reduce the mould stations as much as possible, such as combining the trimming and forward stretching of the initial product on one station, and the improved mould has a relatively simple structure, greatly reduces the manufacturing cost, the production cost and the maintenance cost of the mould, and also can properly improve the production capacity and the efficiency, greatly saves the loss of raw materials because the raw materials are less in lapping, and reduces the raw material cost by 20.5% for each finished product. The following is a detailed description of examples.
Embodiment one: as shown in fig. 1, 2 and 3, a forward and reverse stretching die comprises an upper die holder 1, an upper die 2 and a lower die holder 4 of a lower die 3 from top to bottom, wherein a forward stretching station, a reverse stretching station and a discharging station are arranged on the lower die; the upper die and the lower die which are vertically opposite to the forward stretching station and the reverse stretching station are respectively provided with a stretching channel; an upper forward stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the forward stretching station, and a lower forward stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the forward stretching station; an upper reverse stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the reverse stretching station, and a lower reverse stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the reverse stretching station; the side of the forward stretching station is provided with a lower die push rod structure, the lower die push rod structure comprises a lower die push rod 5 for pushing a product, and the upper die is further provided with an upper die insert knife 6 for clamping/releasing the lower die push rod to advance. And the unloading station is provided with an unloading structure. The upper forward stretching structure comprises a cylindrical upper stripping block 7, and an upper die cutting punch 8 and a pressing block 9 which are sequentially sleeved on the upper stripping block 7. The lower forward stretching structure comprises a lower die stretching punch 10, a lower stripping block A11 and a lower knife edge 12 which are sequentially sleeved on the lower die stretching punch 10. The upper reverse stretching structure comprises a cylindrical upper die stretching punch 13 and an upper stripper sleeve 14 sleeved on the upper die stretching punch. The lower reverse stretching structure comprises a cylindrical lower stripping block 15 and a lower forming block 16 sleeved on the lower stripping block B15. The lower die push rod structure also comprises a lower die push rod fixing block 17 and a lower die push rod guide rail 18. The discharging structure comprises a downhill discharging plate 19. The bottom of the upper die slotting tool 6 is provided with a slotting tool inclined plane 20, and the front end of the lower die push rod fixing block is provided with a front end inclined plane 21 matched with the slotting tool inclined plane. The top ends of the upper forward stretching structure, the lower forward stretching structure, the upper reverse stretching structure and the lower reverse stretching structure are all connected with a power spring 22. The stretching channel of the upper die holder penetrates through the whole upper die, an upper cover plate 23 is further arranged on the top of the upper die holder 1, and a channel communicated with the stretching channel of the upper die holder 1 is also arranged on the upper cover plate.
Embodiment two: as shown in fig. 4, 5 and 6, a forward and reverse stretching die comprises an upper die holder 1, an upper die 2 and a lower die holder 4 of a lower die 3 from top to bottom, wherein a forward stretching station, a reverse stretching station and a discharging station are arranged on the lower die; the upper die and the lower die which are vertically opposite to the forward stretching station and the reverse stretching station are respectively provided with a stretching channel; an upper forward stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the forward stretching station, and a lower forward stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the forward stretching station; an upper reverse stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the reverse stretching station, and a lower reverse stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the reverse stretching station; the side of the forward stretching station is provided with a lower die push rod structure, the lower die push rod structure comprises a lower die push rod 5 for pushing a product, and the upper die is further provided with an upper die insert knife 6 for clamping/releasing the lower die push rod to advance. And the unloading station is provided with an unloading structure. The upper forward stretching structure comprises a cylindrical upper stripping block 7, and an upper die cutting punch 8 and a pressing block 9 which are sequentially sleeved on the upper stripping block 7. The lower forward stretching structure comprises a lower die stretching punch 10, a lower stripping block A11 and a lower knife edge 12 which are sequentially sleeved on the lower die stretching punch 10. The upper reverse stretching structure comprises a cylindrical upper die stretching punch 13 and an upper stripper sleeve 14 sleeved on the upper die stretching punch. The lower reverse stretching structure comprises a cylindrical lower stripping block 15 and a lower forming block 16 sleeved on the lower stripping block B15. The lower die push rod structure also comprises a lower die push rod fixing block 17 and a lower die push rod guide rail 18. The discharging structure comprises a downhill discharging plate 19. The bottom of the upper die slotting tool 6 is provided with a slotting tool inclined plane 20, and the front end of the lower die push rod fixing block is provided with a front end inclined plane 21 matched with the slotting tool inclined plane. The top ends of the upper forward stretching structure, the lower forward stretching structure, the upper reverse stretching structure and the lower reverse stretching structure are all connected with a power spring 22. The upper die holder 1 is thick, and the stretching channel in the upper die holder is long enough, and compared with the first embodiment, an upper cover plate is not needed on the top of the upper die holder.
Embodiment III: on the basis of the first embodiment, a lower cover plate can be arranged at the bottom end of the lower membrane seat 4 according to the thickness of the lower membrane seat 4, and a channel communicated with the stretching channel of the lower die seat 4 is also arranged on the lower cover plate.
Embodiment four: on the basis of the second embodiment, a lower cover plate can be arranged at the bottom end of the lower membrane seat 4 according to the thickness of the lower membrane seat 4, and a channel communicated with the stretching channel of the lower die seat 4 is also arranged on the lower cover plate.
In the above-described embodiments, the stretching method of the forward and reverse stretching die in the examples includes the steps of:
s1: the punch drives the upper die 2 to press downwards, and the upper die slotting tool 6 enters into two side holes of the lower die push rod fixing block 17 in advance;
s2: the upper die 2 continues to run downwards, when the feeding belt 26 continuously reaches a forward stretching station along with the feeding machine, the upper die blanking punch 8 and the lower knife edge 12 are matched for punching and separating out original products, the lower die stretching punch 10 enters the inner side of the upper die blanking punch 8 for upward forward stretching action of the products, after stretching is finished, the upper die 2 runs upwards for die opening, the upper stripping block 7 ejects a stretched semi-finished product 24 out of the inner side of the upper die blanking punch 8, and the lower stripping block A11 ejects the stretched semi-finished product 24 out of the lower die surface;
s3, the upper die slotting tool 6 moves upwards, the lower die push rod 5 moves forwards, and the stretching semi-finished product 24 on the forward stretching station is pushed to the inner side of the lower forming block 16 of the reverse stretching station;
s4: the punch drives the upper die 2 to run downwards again, the forward stretching station continues to step S2, and the upper die stretching punch 13 presses the stretched semi-finished product 24 into the inner side of the lower forming block 16 of the lower die 3 to carry out reverse stretching at the reverse stretching station;
s5: after the reverse stretching is finished, the upper die 2 moves upwards to open the die, the upper stripping sleeve 14 ejects a finished product 25 after the reverse stretching out of the upper die stretching punch 13, the lower stripping block B15 of the lower die 3 ejects the finished product 14 to the lower die surface, then the lower die push rod 5 moves forwards along with the upward movement of the upper die inserting knife 6, and the semi-finished product 24 stretched by the forward stretching station is continuously pushed to the inner side of the lower forming block 16 of the reverse stretching station; and the stretched semi-finished product 24 pushes the stretched finished product 25 of the reverse stretching station onto the discharge plate 19 in front of the mould, and the finished product 25 slides out of the mould.
Compared with the mould of the invention improved in the prior art, the mould has a relatively simple structure, greatly reduces the manufacturing cost, the production cost and the maintenance cost of the mould, and also can properly improve the production capacity and the efficiency, and greatly saves the loss of raw materials because the raw materials are less in lapping
Each finished product of the first embodiment can reduce the cost of raw materials by 20.5%;
each finished product of the second embodiment can reduce the cost of raw materials by 19.5%;
each finished product of the third embodiment can reduce the raw material cost by 21%;
each finished product of the fourth embodiment can reduce the raw material cost by 20%.
The die and the stretching method described in the above embodiments can reduce the cost of raw materials by about 20% for each finished product, compared with the existing die and stretching method, within the allowable range of calculation and measurement errors.
The foregoing embodiments are illustrative of the preferred embodiments of the present invention, and are not intended to be limiting, and other modifications may be made in the present invention under the same circumstances, and it is to be understood that any obvious substitution is within the scope of the present invention without departing from the spirit of the present invention.
Claims (10)
1. Forward and reverse stretching die, from the top down includes upper die base (1), upper die (2), lower mould (3) and die holder (4) in proper order, its characterized in that:
the lower die is provided with a forward stretching station, a reverse stretching station and a discharging station; the upper die and the lower die which are vertically opposite to the forward stretching station and the reverse stretching station are respectively provided with a stretching channel;
an upper forward stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the forward stretching station, and a lower forward stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the forward stretching station;
an upper reverse stretching structure is arranged in a stretching channel of the upper die, which is vertically opposite to the reverse stretching station, and a lower reverse stretching structure is arranged in a stretching channel of the lower die, which is vertically opposite to the reverse stretching station;
the side of the forward stretching station is provided with a lower die push rod structure, the lower die push rod structure comprises a lower die push rod (5) for pushing a product, and the upper die is also provided with an upper die insert knife (6) for clamping/releasing the lower die push rod to advance.
And the unloading station is provided with an unloading structure.
2. The forward and reverse stretching die according to claim 1, wherein: the upper forward stretching structure comprises a cylindrical upper stripping block (7), and an upper die cutting punch (8) and a pressing block (9) which are sequentially sleeved on the upper stripping block (7).
3. The forward and reverse stretching die according to claim 2, wherein: the lower forward stretching structure comprises a lower die stretching punch head (10), a lower stripping block A (11) and a lower knife edge (12) which are sequentially sleeved on the lower die stretching punch head (10).
4. A forward and reverse stretching die as set forth in claim 3, wherein: the upper reverse stretching structure comprises a cylindrical upper die stretching punch (13) and an upper stripping sleeve (14) sleeved on the upper die stretching punch.
5. The forward and reverse stretching die as claimed in claim 4, wherein: the lower reverse stretching structure comprises a cylindrical lower stripping block (15) and a lower forming block (16) sleeved on the lower stripping block B (15).
6. The forward and reverse stretching die according to claim 1, wherein: the lower die push rod structure also comprises a lower die push rod fixing block (17) and a lower die push rod guide rail (18).
7. The forward and reverse stretching die according to claim 1, wherein: the discharging structure comprises a downhill discharging plate (19); the bottom of the upper die slotting tool (6) is provided with a slotting tool inclined plane (20), and the front end of the lower die push rod fixing block is provided with a front end inclined plane (21) matched with the slotting tool inclined plane.
8. The forward and reverse stretching die as claimed in claim 6, wherein: and the top ends of the upper forward stretching structure, the lower forward stretching structure, the upper reverse stretching structure and the lower reverse stretching structure are all connected with a power spring (22).
9. The forward and reverse stretching die according to claim 1, wherein: an upper cover plate (23) is further arranged on the top of the upper die holder, and a channel communicated with the upper die holder stretching channel is also arranged on the upper cover plate.
10. A stretching method of the forward and reverse stretching die as claimed in claims 1 to 9, comprising the steps of:
s1: the punch drives the upper die to press downwards, and the upper die slotting tool enters holes on two sides of the push rod fixing block of the lower die in advance;
s2: the upper die continues to run downwards, when the feeding belt continuously reaches a forward stretching station along with the feeding machine, the upper die cutting punch and the lower knife edge are matched for punching and separating out original products, the lower die stretching punch enters the inner side of the upper die cutting punch for upward forward stretching action of the products, after stretching is finished, the upper die runs upwards for opening the die, the upper stripping block ejects a stretched semi-finished product out of the inner side of the upper die cutting punch, and the lower stripping block A ejects the stretched semi-finished product out of the lower die surface;
s3, the upper die slotting tool moves upwards, the lower die pushing rod moves forwards, and the stretching semi-finished product on the forward stretching station is pushed to the inner side of the lower molding block of the reverse stretching station;
s4: the punch drives the upper die to run downwards again, the forward stretching station continues to step S2, and the upper die stretches the punch to press the stretched semi-finished product into the inner side of the lower molding block of the lower die for reverse stretching at the reverse stretching station;
s5: after the reverse stretching is finished, the upper die moves upwards to open the die, the upper stripping sleeve ejects a finished product subjected to the reverse stretching out of the upper die to stretch the punch, the lower stripping block B of the lower die ejects the finished product out of the lower die surface, then the lower die push rod moves upwards along with the upper die slotting tool, and the semi-finished product stretched by the forward stretching station is continuously pushed to the inner side of the lower forming block of the reverse stretching station; and the stretched semi-finished product also pushes the finished product after reverse stretching of the reverse stretching station onto a discharging plate in front of the die, and the finished product slides out of the die.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310834066.XA CN116871390A (en) | 2023-07-06 | 2023-07-06 | A forward and reverse stretching mold and its stretching method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310834066.XA CN116871390A (en) | 2023-07-06 | 2023-07-06 | A forward and reverse stretching mold and its stretching method |
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