Full-automatic seedling raising plate rapid forming punching die and matched air cooling equipment

By using a fully automated seedling tray rapid prototyping punching mold and air cooling equipment, the problems of manual punching and poor heat dissipation of existing molds have been solved, achieving rapid prototyping and efficient production, and improving processing speed and product quality.

CN119260848APending Publication Date: 2025-01-07刘小茶
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Patent Information

Application Number
CN202310830692.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-07-07
Publication Date
2025-01-07

AI Technical Summary

Technical Problem

Existing seedling tray molds require manual drilling, which is slow, labor-intensive, costly, and results in low daily output. Furthermore, the poor water cooling system affects product quality.

Method used

Design a fully automatic seedling tray rapid prototyping punching mold, including a top cover hook plate component, punching component, punch component, die component and air cooling equipment. It uses the punch and the punch and die with the needle hole structure to achieve automatic forming and punching, and uses the cold air equipment to quickly cool and shape it.

Benefits of technology

It achieves fully automated rapid prototyping and drilling, improving processing speed and daily output, saving labor, equipment and site costs, producing high-quality products with no burrs after drilling, and fast heat dissipation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a full-automatic rapid forming punching die for a seedling raising plate and matched air cooling equipment. The full-automatic rapid forming punching die consists of an upper cover hooking and pressing plate, a convex die, a concave die, a crushing hopper and air cooling equipment, an upper hooking plate and a convex hooking plate are inwards arranged on the upper cover hooking and pressing plate; the punching needle is mounted in the needle mounting plate and is fixed by a needle pressing plate and a screw, or is mounted below the upper cover plate and is fixed by a screw; a spring is arranged in the middle of the punching needle, and the lower part of the punching needle penetrates through the male die needle penetrating hole and the female die needle penetrating hole; an upper convex plate is arranged above the male die, a hooking plate notch is formed in the middle, a lower convex plate is arranged below the male die, and a male die needle penetrating hole is formed in a bottom forming area; the upper hook plate of the upper cover plate supports the needle mounting plate, and the convex hook plate hooks the hook plate notch of the convex die; the needle mounting plate and the punching needle are positioned by the positioning pin and the spring; a female die needle penetrating hole is formed below the forming area of the female die; and cold air nozzles are arranged on the two sides and the bottom of the mold. According to the die, a sheet can be rapidly formed and punched to form a seedling raising plate product, the machining speed is high, manpower, equipment and sites for punching are saved, no protrusion or burr exists in punching, and the die is simple in structure, easy to manufacture and durable.
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Description

Technical Field

[0001] The invention relates to a full-automatic seedling tray rapid forming punching die and matching air cooling equipment, in particular to a die and matching air cooling equipment which can rapidly form and punch plastic sheets into seedling tray products and have a fast processing speed. Background Art

[0002] The known seedling tray mold is composed of a solid male die, a female die and a fixed plate. After the plastic sheet is pressed into the seedling tray, it is manually punched with a punching machine, which is slow and labor-intensive. It also requires investment in the purchase of punching equipment, high production costs, and occupies a lot of processing space. Punching can also cause problems such as skewed holes, crossovers between trays, and separation and deformation, which affects product quality. In addition, the known mold is cooled by a water pipe, which has poor heat dissipation, slow processing speed, and low daily output.

[0003] In order to overcome the problems that the existing molds need to be manually punched after being pressed into seedling trays, and the punching equipment is configured, which is labor-intensive and costly, occupies a large area, has a slow mold processing speed, and has a low daily output, I have invented the "seedling tray forming punching mold" (patent number: ZL 2022 2 0238743.9), and now provide another fully automatic seedling tray rapid forming punching mold and supporting air cooling equipment. The mold and supporting air cooling equipment can fully automatically quickly form and punch plastic sheets to produce seedling tray products, without manual punching, and without spending money to buy punching equipment. The processing speed is fast, the daily output is high, and it saves labor, cost, and processing space; the mold structure is simple, easy to manufacture, and durable. Summary of the invention

[0004] The technical solution adopted by the present invention to solve the technical problem is: it is composed of an upper cover hook pressure plate component, a punching component, a male mold component, a female mold component, a crushing hopper and an air cooling device. The upper cover hook pressure plate component is composed of an upper cover plate and four positioning hook pressure plates. Upper hook plates are arranged on the upper and inner sides of the positioning hook pressure plate, and convex hook plates are arranged on the lower and inner sides; two punch fixing plates are arranged on the upper cover plate, and a punching component is arranged on the lower side. The positioning hook pressure plate is sleeved on the four sides of the needle loading plate, and the head of the punch is installed in the needle loading plate, and a needle pressing plate is installed on it and fixed with screws, or installed on the lower side of the upper cover plate and fixed with screws; a spring is inserted into the middle of the punch, and the lower part is inserted into the needle hole of the punch and the needle hole of the die; a positioning pin is fixed at each of the four corners of the punch, and a spring is inserted, which is passed through the positioning pin hole of the needle loading plate and fixed with a nut to position the needle loading plate and the punch between the upper cover and the punch; the upper part of the punch is arranged into an "I-shaped" rectangular structure that can be pulled up and pressed down, and there are upper and lower parts on the upper side. The convex plate has hook plate notches inwards around the middle and lower convex plates outwards around the lower part; the four positioning hook pressure plates of the upper cover plate are sleeved on the outside of the "I-shaped" rectangular block of the punching component and the upper part of the punch, the upper hook plate supports the needle plate, and the convex hook plate hooks the notch of the punch hook plate; the lower part of the punch is the forming area and folding area in the shape of the seedling tray, and multiple rows of punch needle holes are set in the punch forming area, and the shapes of the die forming area and folding area correspond to the punch. Multiple rows of die needle holes are set below the die forming area, which are vertically aligned with the punch needle holes; two die fixing plates are set on both sides of the lower side of the die, connected with a crushing hopper bottom plate to form a crushing hopper; cold water pipes are set in the punch and die to cool the inside of the mold, and a set of cold air equipment is set to cool the surface of the mold and the seedling tray after shaping. The cold air generated by the cold air machine is transported to the cold air main pipe, and is divided into multiple outlets for use by multiple sets of molds. Each air outlet is connected to a three-pronged pipe, a cold air pipe, a cold air volume knob, and a cold air bifurcated pipe. Then there are two sets of cold air equalizing pipes and cold air nozzles connected to the mold sides, which are fixed in the middle of the upper chain cover and the lower chain cover on both sides of the molding machine, close to the two sides of the mold; the other set of cold air equalizing pipes and cold air nozzles are connected to the mold bottom, which are fixed on the hopper bottom plate in the crushing hopper at the bottom of the die. Three sets of cold air are used to cool the mold and the formed seedling tray to achieve the purpose of rapid shaping, increasing processing speed, preventing raised burrs from punching holes, and blowing crushed materials to the discharge port to prevent clogging of the mold.

[0005] Punching needles and needle plates of various shapes are designed. There are seven varieties of punching dies: flat-bottomed machine-inserted seedling trays, round-hole-bottomed machine-inserted seedling trays, square-hole-bottomed machine-inserted seedling trays, hexagonal-hole-bottomed machine-inserted seedling trays, round-bowled seedling trays, square-bowled seedling trays, and hexagonal-bowled seedling trays. The shape of the seedling tray is manufactured in the convex and concave molding areas of the mold, and the convex and concave needle holes are set in the molding area. The molding area of ​​the convex mold of the flat-bottomed machine-inserted seedling tray is set as a rectangular block of the above size, with multiple rows of convex needle holes in the middle. The forming area of ​​the concave mold is set to be a rectangular container with a large top and a small bottom, and a concave mold needle hole is set at the bottom; the forming area of ​​the male mold of the round hole bottom machine inserting seedling tray is set with multiple rows of convex round holes, and a male mold needle hole is set in the middle of the convex round hole, and the forming area of ​​the female mold is set with multiple rows of concave round holes, and a female mold needle hole is set at the bottom of the concave round hole; the forming area of ​​the male mold of the square hole bottom machine inserting seedling tray is set with multiple rows of convex square holes, and a male mold needle hole is set in the middle of the convex square hole, and the forming area of ​​the female mold is set with multiple rows of concave square holes, and a The die has a needle hole; the forming area of ​​the hexagonal hole bottom machine inserting seedling tray convex mold is provided with multiple rows of convex hexagonal holes, and the convex mold needle hole is provided in the middle of the convex hexagonal holes, and the forming area of ​​the concave mold is provided with multiple rows of concave hexagonal holes, and the die needle hole is provided at the bottom of the concave hexagonal holes; the forming area of ​​the round pot seedling tray convex mold is provided with multiple rows of round pot body convex molds, and the convex mold needle hole is provided in the middle of the round pot body convex mold, and the forming area of ​​the concave mold is provided with multiple rows of round pot body concave molds, and the die needle hole is provided at the bottom of the round pot body concave mold; the forming area of ​​the square pot seedling convex mold The molding area is provided with multiple rows of square bowl body punches, and a punch pinhole is provided in the middle of the square bowl body punch; the forming area of ​​the die is provided with multiple rows of square bowl body die, and a die pinhole is provided at the bottom of the square bowl body die; the forming area of ​​the hexagonal bowl seedling tray punch is provided with multiple rows of hexagonal bowl body punches, and a punch pinhole is provided in the middle of the hexagonal bowl body punch; the forming area of ​​the die is provided with multiple rows of hexagonal bowl body die, and a die pinhole is provided at the bottom of the hexagonal bowl body die; the above-mentioned punch pinhole is vertically aligned with the die pinhole.

[0006] When the mold is inverted and the die is installed on the top and the punch on the bottom, the upper part of the die is set to an "I-shaped" rectangular block structure, with upper convex plates on the top and outside, hook plate openings on the middle and inside, and lower convex plates on the bottom and outside; the upper cover plate and four positioning hook pressure plates form a frame-like structure that is sleeved on the outside of the "I-shaped" rectangular block of the punching component and the upper part of the die, and the convex hook plate hooks the concave mold hook plate concave; there is a die needle hole above the die forming area, and a punch needle hole below the punch forming area; the punch needle head is installed in the needle hole of the needle plate, a spring is inserted in the middle, and the lower part is inserted in the die needle hole and the punch needle hole; a positioning pin is fixed to each of the four corners of the die, a spring is inserted in the middle, and the other end passes through the positioning pin hole of the needle plate and is fixed with a nut.

[0007] When processing the seedling tray, the upper pressure plate of the molding machine fixes the punch plate, and the lower pressure plate fixes the die plate; when the molding machine pulls up the punch plate, the spring will pop the upper cover hook pressure plate component and the punching component away from the punch, the convex hook plate hooks the upper convex plate of the punch and moves up, and the punch needle retracts from the needle hole of the die into the needle hole of the punch. At the same time, the molding machine also moves the die downward, separates the die from the die, and after the chain pulls a section of heated and softened plastic sheet into the middle of the die and the punch plate, the punch plate pushes the upper cover plate, the positioning hook pressure plate, the needle plate, the punch needle, the spring and the die downward, and also moves the die and the crushing hopper upward, the molding areas of the die and the die are closed, and the sheet is pressed into the shape of the seedling tray blank. The cold air nozzles at the edge of the mold and the cold air nozzles at the bottom of the mold blow out cold air to quickly cool down the mold and the formed tray blank, and the punch needle also penetrates from the needle hole of the punch into the needle hole of the die, punching rows of permeable plastics at the bottom of the seedling tray. The blade in front of the mold moves vertically to cut the disc blank into slices, achieving the purpose of completing the forming, punching and cutting at the same time, with fast processing speed and good product quality; after shaping and punching, the forming machine moves the punch fixing plate and the upper cover plate upward, the convex hook plate of the positioning hook pressure plate hooks the needle plate and the upper convex plate of the punch and moves upward, and the punch needle retracts from the needle hole of the die to the needle hole of the punch; at the same time, the forming machine also moves the die downward, the punch is separated from the die, the chain clamps the seedling tray blank and moves forward to pull the seedling tray blank out of the mold, and the blades on both sides automatically trim the edges to process it into a seedling tray product. The processing enters the next working cycle program.

[0008] The difference between the present invention and the prior art is that the present invention has an upper cover hook pressure plate component, and there are positioning hook pressure plates around the upper cover plate, upper hook plates inwardly around the upper side, and convex hook plates inwardly around the lower side; there are needle plates, punching needles, springs, and positioning pins between the upper cover hook pressure plate component and the punch; there are moving parts (I-shaped structure) on the upper part of the punch, and there are punch needle holes in the punch forming area; there are punch needle holes and crushing hoppers at the bottom of the forming area of ​​the die; the mold has matching air cooling equipment, and there are cold air nozzles on both sides of the mold and at the bottom of the die. The existing mold is composed of a solid punch, a solid die, and a fixed plate; compared with the existing technology, the present invention is a new mold product and a new processing method, which has outstanding substantive characteristics and significant progress.

[0009] The beneficial effects of the present invention are that it can fully automatically form and punch plastic sheets to produce seedling tray products, without the need for punching, with fast processing speed, high daily output, and can save labor, equipment, site and production costs for punching; in particular, the air cooling device can quickly shape the compression-molded seedling tray, significantly improving the processing speed and output, and the punching will not produce raised burrs, the product stacking is thin, and can save packaging materials and reduce costs; the mold structure is simple, easy to manufacture, and durable. The present invention overcomes the shortcomings of the existing mold that after the seedling tray is compression-molded, it still needs to be punched manually with a punching machine, which has a slow processing speed, is labor-intensive and costly, and has off-center holes, and poor product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0011] Figure 1 .Vertical cross-section internal shape structure diagram of the fully automatic seedling tray rapid forming punching die and the matching air cooling equipment.

[0012] Figure 2 .Shape and structure diagram of mold air cooling equipment.

[0013] Figure 3 .The internal shape structure diagram of the cross section when the flat-bottom machine insert plate rapid prototyping punching die is separated.

[0014] Figure 4 .The internal shape structure diagram of the cross section when the flat-bottom machine insert plate rapid prototyping punching die is closed.

[0015] Figure 5 . Overall shape and structure diagram of the flat-bottom machine insert plate rapid prototyping punching die.

[0016] Figure 6 .Shape and structure diagram of the upper cover hook and pressure plate components.

[0017] Figure 7 .Structural diagram of the internal shape of the upper cover hook pressure plate.

[0018] Figure 8 .Structural diagram of the internal shape of the upper cover plate hook (upper hook plate type).

[0019] Fig. 9 .Shape structure diagram of the round hole needle plate.

[0020] Fig.10 .The internal shape and structure diagram of the round hole needle plate.

[0021] Fig.11 .Shape and structure diagram of various punching needles.

[0022] Fig.12 .Shape structure diagram of the square needle hole and needle plate.

[0023] Fig.13 .Shape structure diagram of the triangular needle hole and needle plate.

[0024] Fig.14 .Shape structure diagram of hexagonal needle hole and needle plate.

[0025] Fig.15 .Structural diagram of the flat bottom machine insert plate punch shape.

[0026] Fig.16 .Structural diagram of the internal shape of the cross section of the flat-bottom machine insert punch.

[0027] Fig.17 .Structure diagram of the shape of the flat-bottom machine insert plate die.

[0028] Fig.18 .Structural diagram of the inverted shape of the flat-bottom machine insert plate die and crushing hopper.

[0029] Fig.19 .The internal shape structure diagram of the cross section when the needle pressing plate, fixed punching needle, flat bottom machine, inserting tray, seedling tray, rapid prototyping punching mold are separated.

[0030] Fig. 20 .The internal shape structure diagram of the vertical section when the needle pressing plate, fixed punching needle, flat bottom machine, inserting tray, seedling tray, rapid forming and punching mold are separated.

[0031] Fig.21 .The internal shape structure diagram of the cross section of the flat-bottom machine insert plate rapid prototyping punching die when it is inverted and closed.

[0032] Fig. 22 .The internal shape structure diagram of the cross section when the round hole bottom machine-inserted seedling tray rapid prototyping punching mold is separated.

[0033] Fig.23 .Structural diagram of the inverted shape of the punch of the round hole bottom machine-inserted seedling tray.

[0034] Fig.24 .The internal shape structure diagram of the cross section of the square hole bottom machine-inserted seedling tray rapid prototyping punching mold when it is separated.

[0035] Fig.25 .Structural diagram of the inverted shape of the punch of the square hole bottom machine-inserted seedling tray.

[0036] Fig.26 .Shape and structure diagram of the die for the square hole bottom machine-inserted seedling tray.

[0037] Fig. 27 .The internal shape structure diagram of the cross section when the punching mold for the rapid prototyping of the hexagonal hole bottom machine-inserted seedling tray is separated.

[0038] Fig.28 .Structural diagram of the inverted shape of the punch of the hexagonal hole bottom machine for inserting the seedling tray.

[0039] Fig.29 .Shape structure diagram of the die for the hexagonal hole bottom machine for inserting seedling trays.

[0040] Fig.30 .The internal shape structure diagram of the cross section of the round bowl sports seedling tray rapid prototyping punching mold when it is separated.

[0041] Fig.31 .Structural diagram of the inverted shape of the round seedling tray convex mold.

[0042] Fig.32 .Shape structure diagram of the concave mold of the round seedling tray.

[0043] Fig.33 .The internal shape structure diagram of the cross section when the multi-needle punching mold for rapid prototyping of round sports seedling tray is separated.

[0044] Fig.34 .Structural diagram of the inverted shape of the multi-needle punching die for the rapid prototyping of round seedling trays.

[0045] Fig.35 .Shape structure diagram of the concave die of the multi-needle punching die for the round seedling tray.

[0046] Fig.36 .The internal shape structure diagram of the cross section of the square bowl sports seedling tray rapid prototyping punching mold when it is separated.

[0047] Fig.37 .Structural diagram of the inverted shape of the square bowl sports seedling tray convex mold.

[0048] Fig.38 .Shape structure diagram of the square bowl seedling tray die.

[0049] Fig.39 .The internal shape structure diagram of the cross section when the hexagonal sports seedling tray rapid prototyping punching mold is separated.

[0050] Fig.40 .Structural diagram of the inverted shape of the hexagonal seedling tray punch.

[0051] Fig.41 .Shape structure diagram of the hexagonal seedling tray die.

[0052] In the figure, I. Upper cover hook plate component, II. Punching component, III. Punch component, IV. Concave component, V. Crusher hopper, VI. Air cooling equipment; 1. Punch fixing plate, 2. Positioning pin, 3. Punch water inlet joint, 4. Exhaust hole, 5. Upper cover, 6. Punch water outlet joint, 7. Spring, 8. Screw, 9. Needle plate, 10. Positioning hook plate, 11. Punch, 12. Punch cold water pipe, 13. Concave, 14. Concave water outlet joint, 15. Concave cold water pipe, 16. Punch needle hole, 17. Concave needle hole, 18. General term for punching needle, 18.1. Convex round head punching needle, 18. 2. Convex point square head punch, 18.3. Convex point hexagonal head punch, 18.4. Convex point triangular head punch, 18.5. Awl round head punch, 18.6. Awl square head punch, 18.7. Threaded convex point round head punch, 18.8. Threaded convex point round head punch, 18.9. Arrow point round head punch, 18.10. Arrow point square head punch, 18.11. Cylindrical round head punch, 18.12. Cylindrical square head punch, 18.13. Square column square head punch, 18.14. Concave and convex point round head punch, 18.15. Multi-needle round head punch, 18.16. Multi-needle square head punch, 18.17. Multi-needle hexagonal head punch, 1 9. Plastic sheet, 19.1. Seedling tray, 20. Convex square hole, 20.1. Concave square hole, 21. Convex round hole, 21.1. Concave round hole, 22. Convex hexagonal hole, 22.1. Concave hexagonal hole, 23. Positioning column, 24. Round pot body convex mold, 25. Round pot body concave mold, 26. Square pot body convex mold, 27. Square pot body concave mold, 28. Hexagonal pot body convex mold, 29. Hexagonal pot body concave mold, 30. Concave mold frame, 31. Molding area, 32. Folding area, 33. Bottom cold air evenly distributing pipe, 34. Upper hook plate, 35. Screw hole, 36. Positioning hole, 37. Cooling fan, 38. Cold air pipe, 39. Cold air bifurcated pipe , 40. Mold edge cold air distribution pipe, 41. Cold air nozzle, 42. Upper chain, 43. Lower chain, 44. Upper chain cover, 45. Lower chain cover, 46. Cold air volume knob, 47. Crusher hopper, 48. Hopper bottom plate, 49. Control panel, 50. Protective valve, 51. Three-pronged pipe, 52. Hook plate notch, 53. Die water inlet joint, 54. Needle pressure plate, 55. Upper convex plate, 56. Lower convex plate, 57. Fixed port, 58. Die fixing plate, 59. Discharge port, 60. Convex hook plate, 61. Positioning pin hole, 62. Cold water pipe hole, 63. Needle installation hole, 64. Cold air main pipe, 65. Air outlet. DETAILED DESCRIPTION

[0053] exist Figure 1In the invention, the punching die for the automatic seedling tray rapid forming and the matching air cooling equipment are composed of an upper cover hook pressure plate component (I), a punching component (II), a male mold component (III), a female mold component (IV), a crushing hopper (V), and an air cooling device (VI). The upper cover hook pressure plate component (I) is a frame structure formed by connecting an upper cover plate (5) and four positioning hook pressure plates (10). There are upper hook plates (34) on the upper inner side of the positioning hook pressure plate and a convex hook plate (60) on the lower inner side. There are two male mold fixing plates (1) on the upper cover plate (5) and a punching component (II) on the lower side. The positioning hook pressure plate (10) is sleeved on the four sides of the needle loading plate (9). The head of the punching needle (18) is installed in the needle loading plate (9). The upper cover plate (5) is installed on it and fixed with screws (8). The middle sleeve of the punching needle (18) The spring (7) is inserted into the punch and the lower part is inserted into the punch needle hole (16) and the die needle hole (17); the lower parts of the four positioning pins (2) are respectively fixed at the four corners of the punch (11), the spring (7) is inserted in the middle, and the other end is passed through the positioning pin hole (61) of the needle plate (9) and fixed with a nut; the upper part of the punch is an "I-shaped" rectangular block structure, with an upper convex plate (55) on the upper four sides, a hook plate notch (52) on the middle four sides, and a lower convex plate (56) on the lower four sides; the upper cover plate (5) and four positioning hook pressure plates (10) The convex hook plate (60) is mounted on the outside of the "I-shaped" rectangular block of the punching component (II) and the upper part of the punch (11), and the hook plate recess (52) of the punch (11); the lower part of the punch (11) is the forming area (31) and the folding area (32) of the seedling tray punch, and there are multiple rows of punch needle holes (16) in the middle of the punch forming area (31), and the lower part of the punch needle (18) is inserted into the punch needle holes (16) and the die needle holes (17); the shapes of the forming area (31) and the folding area (32) of the die (13) are consistent with those of the punch; There are multiple rows of die needle holes (17) below the forming area (31) of the die, which are vertically aligned with the punch needle holes (16); there are die fixing plates (58) on both sides of the die (13) below, which are connected to a crushing hopper bottom plate (48) to form a crushing hopper (V); there is a die cold water pipe (12) between the two rows of die needle holes in the convex die (11), and there is a die cold water pipe (15) between the two rows of die needle holes in the concave die (13); and a set of cold air equipment is provided to cool the mold surface and the seedling tray after shaping. The cold air generated by the cold air machine is transported to the cold air main pipe (64), which is divided into multiple air outlets (65) for use by multiple sets of molds.Each air outlet (65) is connected to a three-pronged pipe (51), a cold air pipe (38), a cold air volume knob (46), and a cold air bifurcated pipe (39). Then, two groups of cold air equalizing pipes (40) and cold air nozzles (41) are connected to the mold side, and are fixed in the middle of the upper chain cover plate and the lower chain cover plate on both sides of the molding machine, close to the two sides of the mold; another group of cold air equalizing pipes (33) and cold air nozzles are connected to the mold bottom, and are fixed in the crushing hopper at the bottom of the concave mold (13). The three groups of cold air are used to cool the mold and the seedling tray after molding, so as to achieve the purpose of rapid shaping, increasing processing speed, punching without raised burrs, blowing the crushed materials to the discharge port, and preventing the mold from being blocked. A control panel (49) is provided above the cold air machine.

[0054] exist Figure 2 In the embodiment, a control panel (49) is provided above the cooling air machine (37), a protective valve (50) and a cooling air main pipe (64) are provided below the cooling air machine (37), and a plurality of air outlets (65) are provided to supply air for cooling a plurality of sets of molds; each air outlet (65) is respectively connected to a three-pronged pipe (51), and then further divided into three channels, connected to a cooling air pipe (38), a cooling air volume knob (46), and a cooling air bifurcated pipe (39), wherein two groups are connected to a mold edge cooling air equalizing pipe (40) and a cooling air nozzle (41), The two cooling elements are fixed on both sides of the mold to cool the mold and the blank; another set of cold air distribution pipes (33) and cold air nozzles (41) connected to the bottom of the mold are fixed on the hopper bottom plate (48) at the bottom of the female mold (13); the cold air distribution pipes (33) and the cold air nozzles (41) are in a "U" shape, and the air outlets are aligned with the discharge port (59), which cool the female mold and the blank after forming and quickly shape them, and blow the broken materials dropped by the punching holes to the discharge port (59) to prevent the broken materials from clogging the mold.

[0055] exist Figure 3 , Figure 4 In the invention, two punch fixing plates (1) are arranged above the upper cover plate (5), and the upper cover plate (5) is connected with four positioning hook pressure plates (10) to form a frame structure, one of which is fixed by screws (8) and can be removed; an upper hook plate (34) is arranged inwardly above the positioning hook pressure plate (10), and a convex hook plate (60) is arranged inwardly below the positioning hook pressure plate (10); the head of the punch needle (18) is arranged in the needle mounting plate (9), and the upper cover plate (5) is arranged above the needle mounting plate and fixed by screws (8); a spring (7) is inserted in the middle of the punch needle (18), and the bottom of the spring is arranged on the top of the punch mold (11); when the punch mold and the concave mold are separated, the lower part of the punch needle (18) is inserted into the punch needle hole (16) (see Figure 3 ), when the male die and the female die are closed, the lower die is inserted into the pinhole (17) of the female die (see Figure 4); the lower parts of the four positioning pins (2) are respectively fixed to the four corners of the punch (11), the spring (7) is inserted in the middle, and the other end passes through the positioning pin hole (61) of the needle plate (9) and is fixed with a nut; the upper part of the punch is an "I-shaped" rectangular block structure, with an upper convex plate (55) on the upper four sides facing outward, a hook plate recess (52) on the middle four sides facing inward, and a lower convex plate (56) on the lower four sides facing outward; the upper cover plate (5) and the four positioning hook pressure plates (10) are sleeved on the outside of the "I-shaped" rectangular block of the punching component (II) and the upper part of the punch (11), and the convex hook plate (60) hooks the hook plate recess (52) of the punch (11); the lower part of the punch (11) is a seedling raising device. The punch mold has a molding area (31) and a folding area (32), and a plurality of rows of punch needle holes (16) are arranged in the middle of the punch molding area (31); the shapes of the molding area (31) and the folding area (32) of the upper part of the die (13) are consistent with those of the punch; a plurality of rows of die needle holes (17) are arranged below the molding area (31) of the die, and the die needle holes (17) are vertically aligned with the punch needle holes (16); there are die fixing plates (58) on both sides of the lower side of the die (13), which are connected to a crushing hopper bottom plate (48) to form a crushing hopper (V); there is a die cold water pipe (12) in the punch (11), and there is a die cold water pipe (15) in the die (13).

[0056] When the seedling tray is processed, the molding machine pulls up the upper cover plate, the convex hook plate (60) hooks the upper convex plate (55) to move the punch (11) upward, and the tension of the spring (7) causes the punch needle (18) to retract from the pinhole (17) of the female die into the pinhole (16) of the male die; at the same time, the molding machine also moves the female die (13) downward, and the male die is separated from the female die; the chain of the molding machine pulls the seedling tray blank forward, achieving rapid demoulding, and also pulls the next section of heated and softened plastic sheet into the convex die. When the molding machine presses the upper cover plate downward, the convex hook plate (60) hooks the upper convex plate (55) of the convex mold (11) and moves downward, and at the same time, the molding machine also moves the concave mold (13) and the crushing hopper (47) upward, the convex mold (11) and the concave mold (13) are closed, and the sheet material is pressed into a seedling tray (19). At the same time, the upper cover plate also pushes the punching needle (18) to penetrate into the needle hole (17) of the concave mold, thereby achieving the purpose of rapid molding and punching.

[0057] exist Figure 5 In the invention, two male mold fixing plates (1) are transversely fixed on the upper cover hook pressure plate component (I), and a positioning hook pressure plate (10) is connected to each of the four sides of the upper cover plate (5) and is sleeved on the upper part of the male mold component (III). The female mold component (IV) is below the male mold component and has two female mold fixing plates (58) below, which are connected to the hopper bottom plate (48) to form a crushing hopper (V), one end of which has a discharge port (59).

[0058] exist Figure 6 , Figure 7 , Figure 8 In the embodiment, a male mold fixing plate (1) is fixed on the upper cover plate (5) and has fixing openings (57) at both ends. The upper cover plate (5) is connected with four positioning hook pressure plates (10) to form a rectangular frame structure, one of which is fixed with screws (8) and is detachable; an upper hook plate (34) is arranged around the upper and inner sides of the positioning hook pressure plate (10), and a male hook plate (60) is arranged below and inward; the upper cover plate (5) is provided with screw holes (35), exhaust holes (4), positioning pin holes (61), and cold water pipe holes (62).

[0059] exist Fig. 9 , Fig.10 In the invention, the needle plate (9) is in the shape of a rectangular block, with a notch at the periphery, and needle holes (63) arranged in a row in the middle, and the needle holes (63) are cylindrical, larger at the top and smaller at the bottom. The needle plate (9) is suitable for installing round-head punching needles. The needle plate (9) is provided with a screw hole (35), a positioning pin hole (61), a cold water pipe hole (62), and a positioning pin hole (61).

[0060] exist Fig.11 Among them, there are convex pointed round head punch needles (18.1), convex pointed square head punch needles (18.2), convex pointed hexagonal head punch needles (18.3), convex pointed triangular head punch needles (18.4), awl round head punch needles (18.5), awl square head punch needles (18.6), threaded convex pointed round head punch needles (18.7), threaded convex pointed square head punch needles (18.8), arrow point square head punch needles (18.9), arrow point round head punch needles (18.10), cylindrical round head punch needles (18.11), cylindrical square head punch needles (18.12), square column square head punch needles (18.13), convex and concave pointed round head punch needles (18.14), multi-needle round head punch needles (18.15), multi-needle square head punch needles (18.16), and multi-needle hexagonal head punch needles (18.17). Select a certain punching needle, the needle hole of the needle plate should be the same shape as the punching needle head, and the shapes of the punching needle hole (16) of the punch die and the punching needle hole (17) of the die should be the same as the shape of the punching needle and slightly larger.

[0061] exist Fig.12 In the embodiment, the pinholes (63) are square and arranged in rows, with a larger aperture at the top and smaller aperture at the bottom, which is suitable for installing the punch pins with square heads.

[0062] exist Fig.13 In the figure, the pin holes (63) are triangular, arranged in rows, with a larger aperture at the top and smaller aperture at the bottom, and are suitable for installing triangular head punch pins.

[0063] exist Fig.14 In the figure, the pinholes (63) are hexagonal, arranged in rows, with a larger aperture at the top and smaller at the bottom, suitable for installing hexagonal punching needles.

[0064] exist Fig.15 , Fig.16In the embodiment, the upper part of the punch (11) is an "I-shaped" rectangular block structure that can be pulled up and pressed down, with an upper convex plate (55) on the upper side, a hook plate notch (52) on the middle side, and a lower convex plate (56) on the lower side. The lower part is the forming area (31) and the folding edge area (32) of the flat bottom machine inserting plate punch. The forming area (31) is larger on the upper side and smaller on the lower side, with folding edges on the surrounding sides. There are multiple rows of punch needle holes (16) inside, and a punch cold water pipe (12) is arranged horizontally, which is not connected with the punch needle holes (16). There are a water inlet joint (3) and a punch outlet joint (6) on the upper side of the punch, and a positioning pin (2) is fixed to each of the four corners.

[0065] exist Fig.17 , Fig.18 In the embodiment, the die (13) is a rectangular block, and the die forming area (31) and the folding area (32) correspond to the convex die; there is a die pinhole (17) at the bottom of the die forming area (31). There are a die water inlet joint (53) and a die water outlet joint (14) at one end of the die. There are two die fixing plates (58) below the die, which are connected to the hopper bottom plate (48) to form a crushing hopper (47). There are cold air pipes (38) and cold air bifurcating pipes (39) at one end of the crushing hopper, and there are mold bottom cold air equalizing pipes (33) and cold air nozzles (41) inside, and a discharge port (59) at the other end. There is a fixing port (57) on the die fixing plate (58).

[0066] exist Fig.19 , Fig. 20 In the present invention, the punching needle (18.10) is installed on the needle loading plate (9), and the needle pressing plate (54) is installed on it and fixed with screws (8); the upper cover plate (5) is connected to the positioning hook pressing plate (10) around, and the upper hook plate (34) is arranged inwardly around the positioning hook pressing plate (10), and the lower hook plate (60) is arranged inwardly below the positioning hook pressing plate (10), and the positioning hook pressing plate (10) is sleeved around the needle loading plate (9), and the upper hook plate (34) supports the needle loading plate (9); and positioning columns (23) are arranged below the two ends of the needle plate (9).

[0067] exist Fig.21The mold is inverted, the female mold (13) is installed at the top, and the male mold (11) is installed at the bottom; the upper part of the female mold has an "I-shaped" rectangular block structure, with upper convex plates (55) on the upper four sides, hook plate recesses (52) on the middle four sides, and lower convex plates (56) on the lower four sides; the lower part has a molding area (31) and a folding area (32); the molding area (31) of the female mold is an inverted container with a small upper part and a large lower part, and a plurality of rows of female mold needle holes (17) are arranged above the bottom; the head of the punch needle (18) is arranged in the needle hole (63) of the needle plate (9), and a spring (7) is inserted in the middle, and the lower part of the punch needle (18) is Insert into the needle hole (16) of the punch; the upper cover (5) is installed on the needle plate (9) and fixed with screws (8); there are positioning columns (23) below the two ends of the needle plate (9) and aligned with the positioning holes (36) of the die (13); there are positioning pins (2) at the four corners of the die (13), one end of which is fixed on the die (13), a spring (7) is inserted in the middle, and the other end is fixed with screws after passing through the positioning pin holes of the needle plate (9) and the upper cover (5); the upper cover (5) is connected to the positioning hook plate (10) around, and the convex hook plate (60) hooks the hook plate notch (52) of the die (13). The punch (11) is inverted, and its shape corresponds to that of the die (13); there is a punch needle hole (16) below the punch (11) and vertically aligned with the die needle hole (17).

[0068] exist Fig. 22 , Fig.23 In the present invention, the punching needle (18.10) is installed on the needle loading plate (9), and the needle pressing plate (54) is installed on the needle loading plate (9) and fixed by screws (8), and the upper hook plate (34) supports the needle loading plate (9); the molding area of ​​the lower part of the male mold (11) has multiple rows of convex circular holes (21), and there is a needle threading hole (16) in the middle of the convex circular hole (21), and the lower part of the punching needle (18.10) is inserted therein; the molding area of ​​the female mold (13) has a concave circular hole (21.1) at a position corresponding to the convex circular hole (21), and there is a female mold needle threading hole (17) at the bottom of the concave circular hole (21.1), which is vertically aligned with the male mold needle threading hole (16).

[0069] exist Fig.24 , Fig.25 , Fig.26 The male mold forming area has multiple rows of male square holes (20), and a male mold needle hole (16) is provided in the middle of the male square hole (20). The female mold forming area has a female square hole (20.1), and a female mold needle hole (17) is provided at the bottom, which is vertically aligned with the male mold needle hole (16). A crushing hopper (47) is provided at the bottom of the female mold (13).

[0070] exist Fig. 27 , Fig.28 , Fig.29The bottom of the male mold forming area has multiple rows of male hexagonal holes (22), and a male mold pinhole (16) is provided in the middle of the male hexagonal holes (22); the bottom of the female mold forming area has female hexagonal holes (22.1), and a female mold pinhole (17) is provided in the middle of the female hexagonal holes (22.1); the female mold pinhole (17) is vertically aligned with the male mold pinhole (16).

[0071] exist Fig.30 , Fig.31 , Fig.32 The head of the punching needle (18.1) is arranged on the needle loading plate (9), and the needle pressing plate (54) is arranged on the top and fixed by screws (8); the upper cover plate (5) is arranged on the needle pressing plate (54), the positioning hook pressing plate (10) is sleeved around the needle loading plate (9), and the upper hook plate (34) of the positioning hook pressing plate (10) supports the needle loading plate (9); the convex mold forming area has multiple rows of round bowl body convex molds (24), and the middle of the round bowl body convex molds (24) has a convex mold needle hole (16); the punching needle (18.1) is inserted into the convex mold needle hole (16); the concave mold forming area has multiple rows of round bowl body concave molds (25), and the bottom of the round bowl body concave mold (25) has a concave mold needle hole (17); the concave mold needle hole (17) is aligned with the convex mold needle hole (16).

[0072] exist Fig.33 , Fig.34 , Fig.35 In the embodiment, a round bowl body convex mold (24) is provided at the bottom of the convex mold forming area (31), a plurality of needle holes (16) are provided in the middle of the round bowl body convex mold (24), and the lower part of a multi-needle round-head punching needle (18.15) is inserted into the needle hole (16) of the round bowl body convex mold (24); a round bowl body concave mold (25) is provided at the bottom of the round bowl body concave mold (25), and a plurality of concave mold needle holes (17) are vertically aligned with the convex mold needle holes (16). A crushing hopper (47) is provided below the concave mold (13).

[0073] exist Fig.36 , Fig.37 , Fig.38 In the embodiment, a plurality of rows of square bowl body convex molds (26) are provided at the bottom of the convex mold forming area, and a pinhole (16) is provided in the middle of the square bowl body convex molds (26); a plurality of rows of square bowl body concave molds (27) are provided at the bottom of the concave mold forming area, and the square bowl body convex molds (26) are vertically corresponding to the square bowl body convex molds (26); and a concave mold pinhole (17) is provided at the bottom of the square bowl body concave molds (27), and the concave mold pinhole (17) is aligned with the convex mold pinhole (16).

[0074] exist Fig.39 , Fig.40 , Fig.41In the embodiment, there are multiple rows of hexagonal bowl-shaped convex molds (28) at the bottom of the convex mold forming area, and a convex mold pinhole (16) is provided in the middle of the hexagonal bowl-shaped convex mold (28); and there are multiple rows of hexagonal bowl-shaped concave molds (29) at the bottom of the concave mold forming area, and a concave mold pinhole (17) is provided at the bottom of the hexagonal bowl-shaped concave mold (29), which is vertically aligned with the convex mold pinhole (16).

Claims

1. A fully automatic seedling tray rapid prototyping punching die and a matching air cooling device, comprising an upper cover hook pressure plate component (I), a punching component (II), a male mold component (III), a female mold component (IV), a crushing hopper (V), and an air cooling device (VI), wherein: The upper cover hook pressure plate component (I) is a frame structure formed by connecting an upper cover plate (5) and four positioning hook pressure plates (10). The upper and inner sides of the positioning hook pressure plates (10) are provided with upper hook plates (34) and lower and inner sides thereof; two punch fixing plates (1) are provided on the upper cover plate (5), and a punching component (II) is provided below; the positioning hook pressure plate (10) is sleeved around the needle mounting plate (9), the head of the punching needle (18) is arranged in the needle mounting hole (63) of the needle mounting plate (9), the upper pressure needle plate (54) is fixed by screws (8), or is installed below the upper cover plate (5) and fixed by screws (8); the middle of the punching needle (18) is sleeved with a spring (7), and the lower part is inserted into the convex mold fixing plate (11). The punch (11) is provided with a needle hole (16) and a needle hole (17) of the die; a positioning pin (2) is fixed at each of the four corners of the punch (11), a spring (7) is inserted, and the pin is passed through the positioning pin hole of the needle plate and then fixed with a nut; the upper part of the punch is an "I-shaped" rectangular block structure, with an upper convex plate (55) on the upper four sides facing outward, a hook plate recess (52) on the middle four sides facing inward, and a lower convex plate (56) on the lower four sides facing outward; the upper cover plate (5) and the positioning hook pressure plate (10) are sleeved on the outside of the "I-shaped" rectangular block of the punching component (II) and the upper part of the punch (11); the upper hook plate (34) supports the needle plate (9), and the convex hook plate (60) hooks the hook plate recess (52) of the punch (11); the punch The lower part of (11) is a seedling tray-shaped forming area (31) and a folding area (32), and a plurality of rows of punch needle holes (16) are arranged in the middle of the forming area; the shapes of the forming area (31) and the folding area (32) of the die are consistent with those of the die; a plurality of rows of die needle holes (17) are arranged below the die forming area (31), and the die needle holes (17) are vertically aligned with the punch needle holes (16); a die fixing plate (58) is arranged on both sides of the lower side of the die (13), and is connected to a crushing hopper bottom plate (48) to form a crushing hopper (V); a die cold water pipe (12) is arranged between the two rows of die needle holes in the die (11), and a cold water pipe (12) is arranged between the two rows of die needle holes in the die (13). There is a cold water pipe (15) for the die; the mold has a matching air cooling device, a control panel (49) is provided above the air cooler, a cold air main pipe (64) is provided below, and there are multiple air outlets (65), each air outlet (65) is connected to a three-pronged pipe (51), a cold air pipe (38), a cold air volume knob (46), and a cold air bifurcated pipe (39), and then there are two groups of cold air distribution pipes (40) and cold air nozzles (41) connected to the die side, which are fixed in the middle of the upper chain cover plate and the lower chain cover plate on both sides of the molding machine, close to both sides of the mold; another group of cold air distribution pipes (33) and cold air nozzles (41) connected to the bottom of the mold are fixed on the hopper bottom plate (48) in the crushing hopper at the bottom of the die (13).

2. The fully automatic seedling tray rapid prototyping punching die and the matching air cooling equipment according to claim 1 are characterized by: The upper cover hook pressure plate component (I) is composed of an upper cover plate (5) and four positioning hook pressure plates (10) connected to form a rectangular frame structure, wherein a vertical positioning hook pressure plate is detachable and has screw holes (35) on it and is fixed by screws (8); the positioning hook pressure plate (10) is provided with upper hook plates (34) on the upper side and inwardly around it, and with a convex hook plate (60) on the lower side; the upper cover plate (5) is provided with an exhaust hole (4), a positioning pin hole (61), and a cold water pipe hole (62), and two convex mold fixing plates (1) are fixed on it, and the two ends of the convex mold fixing plates (1) are provided with fixing openings (57).

3. The fully automatic seedling tray rapid prototyping punching die and the matching air cooling equipment according to claim 1 are characterized by: The punching component (II) is composed of a needle plate (9), a punching needle (18), a positioning pin (2), and a spring (7); the needle plate (9) is a rectangular block, and has a needle hole (63), a positioning pin hole (61), a cold water pipe hole (62), and a screw hole (35); the needle holes (63) are larger at the top and smaller at the bottom, and are arranged in rows; the needle plate (9) has circular, square, hexagonal, and triangular needle holes (63); the punching needle (18) has a convex pointed round head punching needle (18.1), a convex pointed square head punching needle (18.2), a convex pointed hexagonal head punching needle (18.3), and a convex pointed triangular head punching needle (18.4), awl round head punch needle (18.5), awl square head punch needle (18.6), thread convex point round head punch needle (18.7), thread convex point square head punch needle (18.8), arrow point round head punch needle (18.9), arrow point square head punch needle (18.10), cylindrical round head punch needle (18.11), cylindrical square head punch needle (18.12), square column square head punch needle (18.13), convex and concave point round head punch needle (18.14), multi-needle round head punch needle (18.15), multi-needle square head punch needle (18.16), multi-needle hexagonal square punch needle (18.17).

4. The fully automatic seedling tray rapid prototyping punching die and the matching air cooling equipment according to claim 1 are characterized by: There are seven kinds of rapid forming punching dies, namely, flat-bottomed machine-inserted seedling tray, round-hole-bottomed machine-inserted seedling tray, square-hole-bottomed machine-inserted seedling tray, hexagonal-hole-bottomed machine-inserted seedling tray, round-bowled seedling tray, square-bowled seedling tray and hexagonal-bowled seedling tray; the forming area of ​​the flat-bottomed machine-inserted seedling tray convex mold is a rectangular block with a large upper portion and a plurality of rows of convex mold pinholes (16) in the middle; the forming area of ​​the concave mold is a rectangular container with a large upper portion and a small lower portion, and a concave mold pinhole (17) is provided at the bottom; the forming area of ​​the round-hole-bottomed machine-inserted seedling tray convex mold has a plurality of rows of convex round holes (21) in the convex round holes The middle of the hole (21) has a male mold needle hole (16), the female mold forming area has multiple rows of concave round holes (21.1), and the bottom of the concave round holes has a female mold needle hole (17); the forming area of ​​the male mold of the square hole bottom machine inserting seedling tray has multiple rows of convex square holes (20), the middle of the convex square holes has a male mold needle hole (16), the forming area of ​​the female mold has multiple rows of concave square holes (20.1), and the bottom of the concave square holes has a female mold needle hole (17); the forming area of ​​the male mold of the hexagonal hole bottom machine inserting seedling tray has multiple rows of convex hexagonal holes (22), The middle of the hole has a punch needle hole (16), the molding area of ​​the die has multiple rows of concave hexagonal holes (22.1), and the bottom of the concave hexagonal holes has a die needle hole (17); the molding area of ​​the round pot seedling plate punch has multiple rows of round pot body punches (24), the middle of the round pot body punch has a punch needle hole (16), the molding area of ​​the die has multiple rows of round pot body die (25), and the bottom of the round pot body die has a die needle hole (17); the molding area of ​​the square pot seedling punch has multiple rows of square pot body punches (26), the middle of the square pot body punch has a punch needle hole (17). The present invention relates to a punch needle hole (16), a forming area of ​​a concave mold has multiple rows of square bowl body concave molds (27), and a concave mold needle hole (17) is provided at the bottom of the square bowl body concave mold (27); a forming area of ​​a hexagonal bowl body seedling tray punch has multiple rows of hexagonal bowl body punches (28), and a punch needle hole (16) is provided in the middle of the hexagonal bowl body punch; a forming area of ​​a concave mold has multiple rows of hexagonal bowl body concave molds (29), and a concave mold needle hole (17) is provided at the bottom of the hexagonal bowl body concave mold; the punch needle hole (16) is vertically aligned with the concave mold needle hole (17).

5. The fully automatic seedling tray rapid prototyping punching die and the matching air cooling equipment according to claim 1 are characterized by: The crushing hopper (47) is composed of two concave mold fixing plates (58) on both sides and a hopper bottom plate (48) connected together, and is located below the mold. One end of the crushing hopper is provided with a row of mold bottom cold air distribution pipes (33) and cold air nozzles (41), and the other end is provided with a discharge port (59).

6. The fully automatic seedling tray rapid prototyping punching die and the matching air cooling equipment according to claim 1 are characterized by: A control panel (49) is provided above the cooling air machine (37), and a protective valve (50) and a cooling air main pipe (64) are provided below. The cooling air main pipe has a plurality of air outlets (65) which are respectively connected to the three-pronged pipe (51), and then connected to the cooling air pipe (38), the cooling air volume knob (46), and the cooling air bifurcated pipe (39). Two sets of cooling air equalizing pipes (40) and cooling air nozzles (41) connected to the mold side are fixed in the middle of the upper chain cover plate and the lower chain cover plate on both sides of the molding machine, close to both sides of the mold; one set of cooling air equalizing pipes (33) and cooling air nozzles (41) connected to the mold bottom are fixed on the hopper bottom plate (48) in the crushing hopper (47) at the bottom of the concave mold (13); the cooling air equalizing pipes (33) and cooling air nozzles (41) at the mold bottom are in a "U" shape, and the air outlets are aligned with the discharge port (59).

7. The fully automatic seedling tray rapid prototyping punching die and the matching air cooling equipment according to claim 1 are characterized by: When the inverted die (13) is installed on the upper side and the convex die (11) is installed on the lower side, the upper part of the die has an "I-shaped" rectangular block structure, with upper convex plates (55) on the upper sides, hook plate openings (52) on the middle sides, and lower convex plates (56) on the lower sides. The upper cover plate (5) and four positioning hook plates (10) form a frame structure that is sleeved on the outside of the "I-shaped" rectangular block of the punching component (II) and the upper part of the die (13), and the convex hook plate (60) hooks the hook plate recess (52) of the die (13). In the die forming area (3 1) is provided with a plurality of rows of die needle holes (17) above the die; the head of the punch (18) is arranged in the needle hole (63) of the needle plate (9), a spring (7) is inserted in the middle, and the lower part is inserted in the die needle hole (17) and the punch needle hole (16); a punch needle hole (16) is provided below the forming area of ​​the punch (11) and is vertically aligned with the die needle hole (17); a positioning pin (2) is fixed to each of the four corners of the die (13), a spring (7) is inserted in the middle, and the other end passes through the positioning pin hole (61) of the needle plate (9) and is fixed with a nut.

Citation Information

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