A cold heading die for the head groove of an injection molded part

Abstract

The present invention relates to the field of cold heading facilities, and in particular to a cold heading mold for a head groove of an injection molded part, comprising a mold platform and a cold heading lower mold installed in the middle of the upper end of the mold platform, a cold heading upper mold is arranged directly above the cold heading lower mold, guide rods are arranged at the front and rear of the cold heading lower mold, the outer surfaces of the two guide rods are fitted with guide sleeves, a plate seat is fixedly installed between the two guide sleeves, a download plate is slidably installed inside the plate seat, a plurality of positioning sleeves are evenly distributed and inlaid on the upper end of the download plate, an upper loading plate is elastically arranged above the plate seat, a plurality of magnetic columns are evenly distributed and fixedly installed on the lower end of the upper loading plate, and the magnetic columns correspond to the positioning sleeves. The present invention reduces the labor intensity of workers, improves the material removal efficiency, and ensures that the bar material is smoothly taken out from the cold heading lower mold.

Description

Technical Field

[0001] The invention relates to the field of cold heading facilities, in particular to a cold heading die for a head groove of an injection molded part. Background Art

[0002] Cold heading technology is a type of cold forming, which is a processing method that uses cold heading dies to punch, shear, bend, and draw materials at room temperature.

[0003] When using a cold heading die to punch the heads of some bars to form grooves, in order to improve production efficiency, multiple bars are generally cold headed at the same time. However, in the actual cold heading process, after cold heading, the ejector on the cold heading lower die ejects multiple bars, and workers usually manually take out the multiple bars one by one for unloading. The operation process greatly increases the labor intensity and the unloading efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a cold heading die for the head groove of an injection molded part.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a cold heading mold for a head groove of an injection molded part, comprising a mold table and a cold heading lower mold installed in the middle of the upper end of the mold table, a cold heading upper mold is arranged directly above the cold heading lower mold, guide rods are arranged on the front and rear sides of the cold heading lower mold, the outer surfaces of the two guide rods are fitted with guide sleeves, a plate seat is fixedly installed between the two guide sleeves, a download plate is slidably installed inside the plate seat, a plurality of positioning sleeves are evenly distributed and inlaid on the upper end of the download plate, an upper loading plate is elastically arranged above the plate seat, a plurality of magnetic columns are evenly distributed and fixedly installed on the lower end of the upper loading plate, the magnetic columns correspond to the positioning sleeves, the lower end faces of the magnetic columns are coplanar with the upper end faces of the positioning sleeves, a pushing member is installed on the side of the mold table, and the pushing member is connected to the plate seat, the upper loading plate and the download plate.

[0006] Preferably, a fixing frame is fixedly installed on one end of the guide rod, and the end of the fixing frame is fixed to the upper end of the mold table, and an extension frame is fixedly installed on the other end of the guide rod, and the end of the extension frame is fixed to the side of the mold table, guide edges are extended from the front and rear end faces of the download plate, and guide grooves are opened on the internal front and rear end faces of the plate seat, and the guide edges are fitted into the inside of the guide grooves, and a blocking cap is coaxially inlaid on the outer surface of the guide rod near the fixing frame, and the guide sleeve is fitted on the blocking cap.

[0007] Preferably, a die guide column is fixedly installed at the upper corner of the die table, a bearing cover is fixedly installed on the upper end of the die guide column, a hydraulic cylinder is installed through the upper end of the bearing cover, a die seat is fixedly installed on the output end of the hydraulic cylinder, the die seat is slidably installed on the outer surface of the die guide column, and the middle part of the lower end of the die seat is fixed to the cold heading upper die.

[0008] Preferably, the pushing member includes a servo push cylinder installed through the front edge of the side of the mold platform, two guide columns are symmetrically fixedly installed on the side of the plate seat, push rings are fitted on the outer surfaces of the two guide columns, a T-shaped frame is fixedly installed between the two push rings, the T-shaped frame is connected to the output end of the servo push cylinder, a counteracting spring is wound around the outer side of the guide column, one end of the counteracting spring is fixed to one side of the push ring, and the other end of the counteracting spring is fixed to the side of the plate seat.

[0009] Preferably, a connecting frame is fixedly installed on the output end of the servo push cylinder, the end of the connecting frame is fixed to the side of the T-shaped frame, the upper end of the T-shaped frame is fixedly installed with a rail seat, both ends of the rail seat are fixedly installed with pressure rails, the ends of the pressure rails are arranged to be inclined upward, and guide wheels are installed in the middle of the front and rear ends of the upper loading plate, and the guide wheels are fitted on the pressure rails.

[0010] Preferably, the ends of the two guide columns are coaxially inlaid with limiting caps, the other side of the push ring is fitted on the limiting cap, the upper ends of the two limiting caps are fixedly installed with L-shaped frames, a guide ring is fixedly installed between the ends of the two L-shaped frames, a push column is fitted and installed inside the guide ring, the push column passes through both sides of the guide ring, the push column passes through the side of the T-shaped frame, one end of the push column is fixedly installed with a frame seat, and the end of the frame seat is fixed to the download plate.

[0011] Preferably, a pull cap is coaxially embedded in the other end of the push column, a pull spring is wound around the outside of the push column, one end of the pull spring is fixed to the guide ring, and the other end of the pull spring is fixed to the pull cap, a top cap is provided on the front side of the push column, a cap rack is fixedly installed on the rear end of the top cap, and an end of the cap rack is fixed to the rear extension rack.

[0012] Preferably, a guide column is fixedly installed at the upper corner of the plate seat, the upper loading plate is slidably installed on the outer surface of the guide column, the upper end of the guide column is coaxially inlaid with a limiting cap, the upper loading plate is attached to the lower end of the limiting cap, and a return spring is wound around the outer side of the guide column, the upper end of the return spring is fixed to the lower end of the upper loading plate, and the lower end of the return spring is fixed to the upper end of the plate seat.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The moving T-shaped frame can drive the plate seat and the upper loading plate to move synchronously. At this time, the guide sleeve slides on the guide rod to guide it and move it to the top of the cold heading lower die, so as to use the magnetic force of multiple plate seats to adsorb multiple ejected bars. Then the T-shaped frame drives the plate seat and the upper loading plate to move in the opposite direction to reset. During this process, the push column will fit on the top cap to block the download plate and keep the download plate still. Then the plate seat and the upper loading plate continue to move. At this time, the download plate slides in the plate seat, so that the magnetic column on the upper loading plate is misaligned with the positioning sleeve on the download plate, so that the bars in the positioning sleeve can fall off by themselves when the magnetic column is lost. The bar can be collected, so that multiple bars can be taken out at one time to complete the unloading, without the need for workers to manually unload, which effectively reduces the labor intensity of workers and improves the unloading efficiency.

[0015] 2. When the plate seat and the upper loading plate move to the top of the cold heading lower die, the guide sleeve just fits on the stop cap to keep it still, and then the T-frame will be pushed forward. At this time, the push ring slides on the guide column to offset the spring contraction deformation, so that the T-frame can move normally. The continued advancement of the T-frame will drive the pressure rail to move. At this time, the guide wheel rolls on the inclined surface of the pressure rail to drive the multiple magnetic columns on the upper loading plate to move downward to adsorb the ejected bar stock. After adsorption, the T-frame moves in the opposite direction to make the pressure rail lose the downward pressure on the guide wheel. In this process, the reset spring pushes the upper loading plate so that the magnetic columns on the upper loading plate can drive the bar stock to move vertically upward to pull the bar stock out of the cold heading lower die to avoid the bar stock being blocked by the cold heading lower die during side movement and unable to be taken out, thereby ensuring that the bar stock is smoothly taken out of the cold heading lower die. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a cold heading die for a head groove of an injection molded part according to the present invention;

[0017] Figure 2 It is a schematic diagram of another perspective of a cold heading mold for a head groove of an injection molded part according to the present invention;

[0018] Figure 3 It is a schematic diagram of an upper loading plate of a cold heading die for a head groove of an injection molded part according to the present invention;

[0019] Figure 4 A cold heading die for a head groove of an injection molded part according to the present invention Figure 3 A magnified view of middle;

[0020] Figure 5 It is a schematic diagram of a plate seat of a cold heading die for a head groove of an injection molded part according to the present invention;

[0021] Figure 6 The schematic diagram of the download plate of the cold heading die for the head groove of an injection molded part according to the present invention.

[0022] In the figure: 1, die table; 2, die guide column; 3, bearing cover; 4, hydraulic cylinder; 5, die seat; 6, cold heading upper die; 7, guide sleeve; 8, cold heading lower die; 9, fixed frame; 10, guide rod; 11, cap rack; 12, top cap; 13, connecting frame; 14, servo push cylinder; 15, upper loading plate; 16, unloading plate; 17, positioning sleeve; 18, guide edge; 19, guide groove; 20, plate seat; 21 , magnetic column; 22, guide column; 23, reset spring; 24, limit cap; 25, stop cap; 26, T-shaped frame; 27, guide column; 28, offset spring; 29, rail pressure; 30, frame seat; 31, push column; 32, rail seat; 33, guide wheel; 34, guide ring; 35, pull spring; 36, pull cap; 37, push ring; 38, L-shaped frame; 39, limit cap; 40, extension frame. DETAILED DESCRIPTION

[0023] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0024] like Figure 1-Figure 6 The cold heading mold for the head groove of an injection molded part shown in the figure comprises a mold table 1 and a cold heading lower mold 8 installed in the middle of the upper end of the mold table 1. A cold heading upper mold 6 is arranged directly above the cold heading lower mold 8. An ejector pin is installed on the cold heading lower mold 8 to drive the ejector pin to move upward to eject the rod material in the cold heading lower mold 8 for demoulding. Since demoulding using an ejector pin is a prior art and has been widely used, it is not elaborated in detail here. The cold heading upper mold 6 and the cold heading lower mold 8 cooperate to cold head the rod material. Guide rods 10 are arranged on the front and rear sides of the cold heading lower mold 8. Guide sleeves 7 are fitted on the outer surfaces of the two guide rods 10. A plate seat 20 is fixedly installed between the two guide sleeves 7. The guide rods 10 and the guide sleeve 7 play a role in guiding the plate seat 20. A download plate 16 is slidably installed inside the plate seat 20. The plate seat 20 plays a role in guiding the download plate 16 and the upper loading plate 15. The download plate 16 has the function of bearing, and a plurality of positioning sleeves 17 are evenly distributed and embedded throughout the upper end of the download plate 16. The distribution of the positioning sleeves 17 corresponds to the distribution of a plurality of mold cavities on the cold heading lower die 8, so as to ensure that the bar material can smoothly enter the positioning sleeves 17 during unloading. The positioning sleeves 17 play a role in limiting the bar material. The positioning sleeves 17 are made of a magnetically isolating material. An upper loading plate 15 is elastically arranged above the plate seat 20. The download plate 16 plays a role in bearing the positioning sleeves 17. A plurality of magnetic columns 21 are evenly distributed and fixedly installed on the lower end of the upper loading plate 15. The magnetic columns 21 correspond to the positioning sleeves 17. The upper loading plate 15 plays a role in bearing the magnetic columns 21. The lower end surface of the magnetic column 21 is coplanar with the upper end surface of the positioning sleeve 17, so as to ensure that the two will not be obstructed when they are misaligned with each other. A pusher is installed on the side of the die table 1, and the pusher is connected to the plate seat 20, the upper loading plate 15, and the download plate 16.

[0025] A fixing frame 9 is fixedly installed at one end of the guide rod 10, and the end of the fixing frame 9 is fixed to the upper end of the mold platform 1. A protruding frame 40 is fixedly installed at the other end of the guide rod 10. The fixing frame 9 and the protruding frame 40 serve to fix the guide rod 10, and the end of the protruding frame 40 is fixed to the side of the mold platform 1. Guide ridges 18 are extended from the front and rear end faces of the download plate 16, and guide grooves 19 are provided on the internal front and rear end faces of the plate seat 20. The guide ridges 18 fit into the inside of the guide grooves 19, and the guide ridges 18 and the guide grooves 19 serve to allow the download plate 16 to slide normally. A stop cap 25 is coaxially inlaid on the outer surface of the guide rod 10 near the fixing frame 9, and the guide sleeve 7 fits on the stop cap 25, and the stop cap 25 serves to limit the position of the guide sleeve 7.

[0026] A die guide column 2 is fixedly installed at the upper corner of the die table 1, and a bearing cover 3 is fixedly installed on the upper end of the die guide column 2. The die guide column 2 plays a role in guiding the die seat 5. A hydraulic cylinder 4 is installed through the upper end of the bearing cover 3. The bearing cover 3 plays a role in bearing the hydraulic cylinder 4. A die seat 5 is fixedly installed at the output end of the hydraulic cylinder 4. The hydraulic cylinder 4 plays a role in driving the die seat 5 to move. The die seat 5 is slidably installed on the outer surface of the die guide column 2. The die seat The middle part of the lower end of 5 is fixed with the cold heading upper die 6, and the die seat 5 plays the role of supporting the cold heading upper die 6. A plurality of bars are placed in the die cavity on the cold heading lower die 8 in sequence, and then the hydraulic cylinder 4 works to drive the cold heading upper die 6 to move downward. At this time, the die seat 5 slides on the die guide column 2 to guide the cold heading upper die 6 so that the cold heading upper die 6 can contact the cold heading lower die 8 to cold head the bars in the cold heading lower die 8 so that a groove can be formed at the head of the bars.

[0027] The pushing member includes a servo push cylinder 14 which is installed through the front edge of the side of the mold platform 1. Two guide columns 27 are symmetrically fixedly installed on the side of the plate seat 20. The outer surfaces of the two guide columns 27 are fitted with push rings 37. The guide columns 27 play a role in guiding the push rings 37. A T-shaped frame 26 is fixedly installed between the two push rings 37. The T-shaped frame 26 is connected to the output end of the servo push cylinder 14. The servo push cylinder 14 plays a role in driving the T-shaped frame 26 to move left and right. A counteracting spring 28 is wrapped around the outer side of the guide column 27. One end of the counteracting spring 28 is fixed to one side of the push ring 37, and the other end of the counteracting spring 28 is fixed to the side of the plate seat 20. When the guide sleeve 7 is fitted on the stop cap 25, the counteracting spring 28 can offset the thrust generated by the continued movement of the T-shaped frame 26, so that the plate seat 20 remains stationary.

[0028] The output end of the servo push cylinder 14 is fixedly installed with a connecting frame 13, and the end of the connecting frame 13 is fixed to the side of the T-shaped frame 26. The connecting frame 13 plays the role of fixing the T-shaped frame 26 and the output end of the servo push cylinder 14 together. The upper end of the T-shaped frame 26 is fixedly installed with a rail seat 32, and both ends of the rail seat 32 are fixedly installed with a pressure rail 29. The rail seat 32 plays the role of fixing the pressure rail 29. The end of the pressure rail 29 is inclined upward, which can drive the guide wheel 33 to move downward, and then drive the upper loading plate 15 to move downward. The middle part of the front and rear ends of the upper loading plate 15 is installed with a guide wheel 33, which is attached to the pressure rail 29. The T-shaped frame 26 drives the pressure rail 29 to move. At this time, the guide wheel 33 is attached to the inclined surface of the pressure rail 29 and rolls to drive the multiple magnetic columns 21 on the upper loading plate 15 to slide downward in the positioning sleeve 17 to adsorb the ejected rods.

[0029] The ends of the two guide posts 27 are coaxially inlaid with limiting caps 39, and the other side of the push ring 37 is fitted on the limiting cap 39, and the limiting cap 39 serves to limit the push ring 37. The upper ends of the two limiting caps 39 are fixedly installed with L-shaped frames 38, and a guide ring 34 is fixedly installed between the ends of the two L-shaped frames 38, and the L-shaped frame 38 serves to fix the guide ring 34. A push post 31 is fitted and installed inside the guide ring 34, and the push post 31 passes through both sides of the guide ring 34. The guide ring 34 serves to guide the push post 31. The push post 31 passes through the side of the T-shaped frame 26, and one end of the push post 31 is fixedly installed with a frame seat 30, and the end of the frame seat 30 is fixed to the download plate 16, and the frame seat 30 serves to connect the push post 31 and the download plate 16 together.

[0030] The other end of the push column 31 is coaxially inlaid with a pull cap 36, and a pull spring 35 is wound around the outside of the push column 31. The pull cap 36 is pushed by the pull spring 35. One end of the pull spring 35 is fixed to the guide ring 34, and the other end of the pull spring 35 is fixed to the pull cap 36. The pull spring 35 can push the push column 31 so that the download plate 16 can be reset after moving. A top cap 12 is arranged on the positive side of the push column 31. The top cap 12 plays a role of limiting the push column 31. The rear end of the top cap 12 is fixedly installed with a cap rack 11. The cap rack 11 It plays the role of fixing the top cap 12. The end of the cap frame 11 is fixed to the rear extension frame 40. The push column 31 moves and fits on the top cap 12 to block the download plate 16. After the download plate 16 remains stationary, the plate seat 20 and the upper loading plate 15 continue to move driven by the T-shaped frame 26. At this time, the download plate 16 slides in the plate seat 20, so that the magnetic column 21 on the upper loading plate 15 and the positioning sleeve 17 on the download plate 16 are misaligned, so that the rod material in the positioning sleeve 17 can fall by itself and be collected when the magnetic column 21 loses its adsorption to complete the unloading.

[0031] A guide column 22 is fixedly installed at the upper corner of the plate seat 20, and the upper loading plate 15 is slidably installed on the outer surface of the guide column 22. The guide column 22 plays a role of guiding the upper loading plate 15. The upper end of the guide column 22 is coaxially inlaid with a limiting cap 24, and the upper loading plate 15 is attached to the lower end of the limiting cap 24. The limiting cap 24 plays a role of limiting the upper loading plate 15. A return spring 23 is wound around the outer side of the guide column 22, and the upper end of the return spring 23 is fixed to the lower end of the upper loading plate 15. The return spring 23 plays a role of resetting the upper loading plate 15 after moving, and the lower end of the return spring 23 is fixed to the upper end of the plate seat 20.

[0032] During cold heading, multiple bars are placed in the die cavity on the cold heading lower die 8 in sequence, and then the hydraulic cylinder 4 works to drive the cold heading upper die 6 to move downward. At this time, the punching die seat 5 slides on the die guide column 2 to guide the cold heading upper die 6 so that the cold heading upper die 6 can contact the cold heading lower die 8 to cold head the bars in the cold heading lower die 8 so that a groove can be formed on the head of the bars. Then the cold heading upper die 6 moves up and resets, and at the same time, the ejector on the cold heading lower die 8 moves up to eject the bars in the cold heading lower die 8. Then the servo push cylinder 14 drives the T-shaped frame 26 to move, so that the moving T-shaped frame 26 drives the plate seat 20 and the upper loading plate 15 to move synchronously. The guide sleeve 7 slides on the guide rod 10 to guide it so that it moves to the top of the cold heading lower die 8. When the plate seat 20 and the upper loading plate 15 move to the top of the cold heading lower die 8, the guide sleeve 7 just fits on the stop cap 25 to keep it still. Then the T-shaped frame 26 continues to advance. At this time, the push ring 37 slides on the guide column 27 to offset the contraction deformation of the spring 28, so that the T-shaped frame 26 can move normally, so that the pressing rail 29 can be driven to move by the continued advancement of the T-shaped frame 26. At this time, the guide wheel 33 rolls on the inclined surface of the pressing rail 29 to drive the multiple magnetic columns on the upper loading plate 15. 21 slides down in the positioning sleeve 17 to absorb the ejected bar material. In this process, the upper loading plate 15 slides on the guide column 22 for guidance, and the return spring 23 contracts and deforms. After adsorption, the T-shaped frame 26 moves in the opposite direction, thereby driving the pressure rail 29 to move in the opposite direction, so that the pressure rail 29 loses the downward pressure on the guide wheel 33. In this process, the return spring 23 recovers its deformation to push the upper loading plate 15, so that the magnetic column 21 on the upper loading plate 15 can drive the bar material to move vertically upward into the positioning sleeve 17, so as to pull the bar material out of the cold heading lower die 8, and then the T-shaped frame 26 continues to move in the opposite direction to drive the plate seat 20 and the upper The carrier plate 15 is reset, and during this process the push pin 31 will move and fit onto the top cap 12 to block the download plate 16, so that the download plate 16 remains stationary, and then the plate seat 20 and the upper carrier plate 15 continue to move driven by the T-shaped frame 26. At this time, the download plate 16 slides in the plate seat 20, so that the magnetic column 21 on the upper carrier plate 15 and the positioning sleeve 17 on the download plate 16 are misaligned, so that the bar material in the positioning sleeve 17 can fall off by itself and be collected when the magnetic column 21 is lost, so as to complete the unloading, and then the next batch of bar materials can be put into the cold heading lower die 8, and this cycle is repeated to perform cold heading processing on the bar materials.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A cold heading die for a head groove of an injection molded part, comprising a die table (1) and a cold heading lower die (8) mounted in the middle of the upper end of the die table (1), a cold heading upper die (6) being arranged directly above the cold heading lower die (8), characterized in that: Guide rods (10) are arranged at the front and rear sides of the cold heading lower die (8), and guide sleeves (7) are fitted on the outer surfaces of the two guide rods (10), and a plate seat (20) is fixedly installed between the two guide sleeves (7), and a download plate (16) is slidably installed inside the plate seat (20), and a plurality of positioning sleeves (17) are evenly distributed and inlaid on the upper end of the download plate (16), and an upper loading plate (15) is elastically arranged above the plate seat (20), and a plurality of magnetic columns (21) are evenly distributed and fixedly installed on the lower end of the upper loading plate (15), and the magnetic columns (21) correspond to the positioning sleeves (17), and the lower end surface of the magnetic columns (21) is coplanar with the upper end surface of the positioning sleeve (17), and a pusher is installed on the side of the die table (1), and the pusher is connected to the plate seat (20), the upper loading plate (15), and the download plate (16); A fixing frame (9) is fixedly mounted on one end of the guide rod (10), and an end of the fixing frame (9) is fixed to the upper end of the mold platform (1); an extension frame (40) is fixedly mounted on the other end of the guide rod (10), and an end of the extension frame (40) is fixed to the side of the mold platform (1); guide edges (18) are extended from the front and rear end surfaces of the download plate (16); guide grooves (19) are formed on the front and rear end surfaces of the plate seat (20); the guide edges (18) are fitted into the inside of the guide grooves (19); a stop cap (25) is coaxially inlaid on the outer surface of the guide rod (10) near the fixing frame (9), and the guide sleeve (7) is fitted onto the stop cap (25); The pushing member comprises a servo push cylinder (14) which is installed through the front edge of the side of the mold platform (1); two guide columns (27) are symmetrically fixedly installed on the side of the plate seat (20); the outer surfaces of the two guide columns (27) are fitted with push rings (37); a T-shaped frame (26) is fixedly installed between the two push rings (37); the T-shaped frame (26) is connected to the output end of the servo push cylinder (14); a compensation spring (28) is wound around the outer side of the guide column (27); one end of the compensation spring (28) is fixed to one side of the push ring (37); and the other end of the compensation spring (28) is fixed to the side of the plate seat (20); A connecting frame (13) is fixedly mounted on the output end of the servo push cylinder (14), the end of the connecting frame (13) is fixed to the side of the T-shaped frame (26), a rail seat (32) is fixedly mounted on the upper end of the T-shaped frame (26), both ends of the rail seat (32) are fixedly mounted with a pressure rail (29), the end of the pressure rail (29) is arranged to be inclined upward, and guide wheels (33) are mounted in the middle of the front and rear ends of the upper loading plate (15), and the guide wheels (33) are fitted on the pressure rail (29).

2. A cold heading die for a head groove of an injection molded part according to claim 1, characterized in that: A die guide column (2) is fixedly mounted at the corner of the upper end of the die table (1); a bearing cover (3) is fixedly mounted on the upper end of the die guide column (2); a hydraulic cylinder (4) is installed through the upper end of the bearing cover (3); a punch seat (5) is fixedly mounted at the output end of the hydraulic cylinder (4); the punch seat (5) is slidably mounted on the outer surface of the die guide column (2); and the middle part of the lower end of the punch seat (5) is fixed to the cold heading upper die (6).

3. The cold heading mold for the head groove of an injection molded part according to claim 1, characterized in that: The ends of the two guide columns (27) are coaxially inlaid with a limiting connection cap (39), the other side of the push ring (37) is fitted on the limiting connection cap (39), the upper ends of the two limiting connection caps (39) are fixedly mounted with an L-shaped frame (38), a guide ring (34) is fixedly mounted between the ends of the two L-shaped frames (38), a push column (31) is fitted inside the guide ring (34), the push column (31) extends from both sides of the guide ring (34), the push column (31) passes through the side of the T-shaped frame (26), one end of the push column (31) is fixedly mounted with a frame seat (30), and the end of the frame seat (30) is fixed to the download plate (16).

4. A cold heading die for a head groove of an injection molded part according to claim 3, characterized in that: The other end of the push column (31) is coaxially inlaid with a pull cap (36), the outer side of the push column (31) is wound with a pull spring (35), one end of the pull spring (35) is fixed to the guide ring (34), and the other end of the pull spring (35) is fixed to the pull cap (36), a top cap (12) is arranged on the front side of the push column (31), a cap frame (11) is fixedly mounted on the rear end of the top cap (12), and the end of the cap frame (11) is fixed to the rear extension frame (40).

5. A cold heading die for a head groove of an injection molded part according to claim 4, characterized in that: A guide column (22) is fixedly mounted at the upper corner of the plate seat (20); the upper loading plate (15) is slidably mounted on the outer surface of the guide column (22); a limiting cap (24) is coaxially inlaid on the upper end of the guide column (22); the upper loading plate (15) is fitted to the lower end of the limiting cap (24); a return spring (23) is wound around the outer side of the guide column (22); the upper end of the return spring (23) is fixed to the lower end of the upper loading plate (15); and the lower end of the return spring (23) is fixed to the upper end of the plate seat (20).

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