A cutting head tool

Abstract

This utility model relates to the field of sprue cutting technology, specifically a sprue cutting fixture, including an upper and lower die fixed on a punching machine. The lower die has a fixing mechanism on its side for fixing the plastic part. A heating mechanism for heating the upper die is located at the bottom of the moving plate of the punching machine, outside the upper die. The fixing mechanism includes two symmetrical rotating frames rotatably mounted on opposite sides of the lower die, with a pressure plate rotatably mounted at one end of each frame. In this utility model, the rotation of the two rotating frames causes the two pressure plates to firmly press the plastic part onto the lower die. Then, limiting components restrict the movement of the two rotating frames. During the downward movement of the upper die, there is no need for manual support of the plastic part. This avoids the plastic part shifting during sprue removal due to vibrations from the punching machine or manual shaking, thus improving the accuracy of sprue removal and increasing the yield rate of the plastic part.

Description

Technical Field

[0001] This utility model relates to the field of material head punching technology, specifically a material head cutting tool. Background Technology

[0002] Injection molding is a basic process commonly used in the production of electronic products. During the injection molding process, a sprue is formed at the injection port where the injection material is used. This structure is not required in the original design, but it is an unavoidable situation in injection molding. Therefore, removing the sprue is an essential step in injection molding, and it usually requires specialized equipment and personnel to handle.

[0003] Currently, in the process of cutting off the sprue of plastic parts, the workpiece is usually placed in the lower mold for fixation. Then, the upper mold moves downward, making the upper and lower molds similar to a mold closing operation, and the sprue on the plastic part is punched off. Because some plastic products are relatively large, and the sprue that needs to be punched is located at one end of the plastic product, it is necessary to manually hold the plastic part during the punching process. Although the punching machine is usually equipped with a fixing mechanism to fix the plastic part, the fixing mechanism is usually located on the moving plate of the upper mold of the punching machine. Therefore, the plastic part cannot be fixed before punching. It can only be fixed after the upper mold moves down to a certain extent. Before that, it is still necessary to manually hold the plastic part. During the punching process, the lower mold moves at a relatively fast speed, which may cause the plastic part to shift before punching due to the shaking of the hand. This will cause the center of the punch cutter and the sprue on the plastic part to be out of line, resulting in the punching offset and the scrapping of the plastic part. Utility Model Content

[0004] The purpose of this invention is to provide a cutting head tooling to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A cutting head tooling includes an upper mold and a lower mold fixed on a punching machine. The side of the lower mold is provided with a fixing mechanism for fixing a plastic part, and the bottom of the moving plate of the punching machine and located outside the upper mold is provided with a heating mechanism for heating the upper mold.

[0007] The fixing mechanism includes two symmetrical rotating frames that are rotatably disposed on opposite sides of the lower mold. A pressure plate is rotatably disposed at one end of each rotating frame, and a limiting member for limiting the two rotating frames is disposed between the opposite sides of the lower mold.

[0008] Furthermore, the following features are provided: a rotating seat is fixedly connected between the two opposing sides of the lower mold via a rotating shaft and a rotating frame at the corresponding position; one end of the rotating shaft passes through the rotating seat at the corresponding position and is fixedly connected to a gear; the limiting member includes two symmetrical racks slidably connected to the two opposing sides of the lower mold; a rectangular sleeve is fixedly connected to the two opposing sides of the lower mold; a shaped frame slides through the two rectangular sleeves; and the two ends of the shaped frame are fixedly connected to the racks at the corresponding positions.

[0009] Furthermore, the top of the pressure plate is fixedly connected to a rotating seat two that is rotatably connected to a rotating frame at a corresponding position, and the bottom of the pressure plate is fixedly connected to a rubber pad.

[0010] Furthermore, the heating mechanism includes a vertical plate, and an electric heating tube is detachably connected to the side of the vertical plate, with the upper mold located inside the electric heating tube.

[0011] Furthermore, a rectangular sleeve is fixedly connected to the side of the vertical plate, a slider is slidably sleeved inside the rectangular sleeve, and a fixed plate is fixedly connected to the top of the slider and detachably connected to the moving plate on the punching machine.

[0012] Furthermore, the upper die is composed of a punch holder and a punch cutter. One end of the punch holder is provided with a thread that engages with the punch cutter. The punch holder is detachably connected to the moving plate of the punching machine.

[0013] Furthermore, the lower die is composed of a pad, a base, and a punch fixing seat. The pad and the base are fixed together by bolts, and the punch fixing seat is fixed to the top of the pad by bolts. The top of the base has a groove, and a protrusion is fixedly connected to the bottom of the groove. The top of the protrusion has a through hole corresponding to the punch fixing seat.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The rotation of the two rotating frames causes the two pressure plates to press the plastic part tightly onto the lower mold. Then, the two rotating frames are limited by the limiting components. During the downward movement of the upper mold, there is no need to manually support the plastic part. This can avoid the plastic part shifting when cutting the gate waste due to the vibration generated by the punching machine or manual shaking. Therefore, it can improve the accuracy of cutting the gate waste of the plastic part and improve the pass rate of the plastic part.

[0016] 2. By setting the inner cavity of the rectangular sleeve II to a convex structure and allowing the fixing plate to slide within the rectangular sleeve, the electric heating tube will no longer move when the vertical plate contacts the punching machine table, while the upper mold can continue to move under the action of the moving plate to complete the punching of the plastic part gate, thus avoiding the electric heating tube from getting too close to the plastic part and causing deformation of the plastic part.

[0017] 3. By threading the punch holder and the punch cutter together, and by bolting the base and the punch fixing seat to the pad, the punch cutter can be replaced later. This facilitates the removal of waste material of the same size plastic parts but different gate sizes. By opening grooves on the base, the plastic parts can be stuck in the grooves, increasing the stability of the plastic parts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the upper mold in this utility model;

[0020] Figure 3 This is a schematic diagram of the lower mold in this utility model;

[0021] Figure 4 This is a schematic diagram of the fixing mechanism in this utility model;

[0022] Figure 5 This is an enlarged view of point A in this utility model;

[0023] Figure 6 This is a schematic diagram of the heating mechanism in this utility model.

[0024] In the diagram: 1. Upper die; 11. Punch holder; 12. Punch cutter; 2. Lower die; 21. Pad; 22. Base; 23. Punch holder; 24. Groove; 25. Protrusion; 26. Through hole; 27. Rotating seat one; 3. Fixing mechanism; 31. Rotating frame; 32. Pressure plate; 33. Gear; 34. Rack; 35. Rectangular sleeve one; 36. C-shaped frame; 37. Rotating seat two; 4. Heating mechanism; 41. Vertical plate; 42. Electric heating tube; 43. Rectangular sleeve two; 44. Slider; 45. Fixing plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 - Figure 6In this embodiment of the present invention, a cutting head tooling includes an upper mold 1 and a lower mold 2 fixed on a punching machine. A fixing mechanism 3 for fixing the plastic part is provided on the side of the lower mold 2. A heating mechanism 4 for heating the upper mold 1 is provided at the bottom of the moving plate of the punching machine and outside the upper mold 1. The fixing mechanism 3 includes two symmetrical rotating frames 31 that are rotatably arranged on opposite sides of the lower mold 2. A pressure plate 32 is rotatably arranged at one end of the rotating frame 31. A limiting member for limiting the two rotating frames 31 is provided between the opposite sides of the lower mold 2.

[0027] Specifically, firstly, the upper mold 1 and lower mold 2 are fixed on the punching machine (the specific fixing method is existing technology and will not be elaborated here), and the upper mold 1 and lower mold 2 are calibrated. The two rotating frames 31 are released from their restraints by pulling the limiting component, and then rotated so that the two rotating frames 31 move away from each other. The plastic part that needs to have its gate removed after injection molding is placed on the lower mold 2, and the gate position of the plastic part is aligned with the upper mold 1. Then, the two rotating frames 31 are rotated in the opposite direction until the two pressure plates 32 firmly press the plastic part onto the lower mold 2, and the limiting component is pushed to return to its original position and limit the two rotating frames 31. During operation, the upper mold 1 is heated by the heating mechanism 4, and then the upper mold 1 is moved down by the punching machine to cooperate with the lower mold 2 to cut off the waste material at the gate of the plastic part. The device uses the rotation of two rotating frames 31 to press the plastic part tightly onto the lower mold 2 by two pressure plates 32. Then, the two rotating frames 31 are limited by the limiting component. During the downward movement of the upper mold 1, there is no need to manually support the plastic part. This can avoid the plastic part shifting when cutting off the gate waste material due to the vibration generated by the punching machine or manual shaking. Therefore, it can improve the accuracy of cutting off the gate waste material of the plastic part and improve the pass rate of the plastic part.

[0028] Example 1

[0029] like Figure 4 and Figure 5 As shown, in this embodiment, a rotating seat 27 is fixedly connected between the two opposite sides of the lower mold 2 and a rotating frame 31 at the corresponding position via a rotating shaft. One end of the rotating shaft passes through the rotating seat 27 at the corresponding position and is fixedly connected to a gear 33. The limiting member includes two symmetrical racks 34 that are slidably connected to the two opposite sides of the lower mold 2. A rectangular sleeve 35 is fixedly connected to the two opposite sides of the lower mold 2. A U-shaped frame 36 slides through the two rectangular sleeves 35. The two ends of the U-shaped frame 36 are fixedly connected to the racks 34 at the corresponding positions. A rotating seat 37 is fixedly connected to the top of the pressure plate 32 and is slidably connected to the rotating frame 31 at the corresponding position. A rubber pad is fixedly connected to the bottom of the pressure plate 32.

[0030] In this embodiment, a magnet is first embedded in the inner side of the convex frame 36, and an iron block is detachably connected to the side of the lower mold 2. By pulling the convex frame 36, the two racks 34 can be disengaged from the gears 33 at their corresponding positions. At this time, the gears 33 and the rotating frame 31 at their corresponding positions are released from restriction. Then, the rotating frame 31 is rotated so that the two rotating frames 31 move away from each other, and the plastic part is placed on the lower mold 2. Then, the two rotating frames 31 are rotated in opposite directions until the two pressure plates 32 press the plastic part tightly onto the lower mold 2. Then, the convex frame 36 is pushed so that the two racks 34 mesh with the gears 33 at their corresponding positions again. At this time, the rotating frame 31 is limited and cannot rotate under the action of the racks 34. By rotating the pressure plate 32 and the rotating frame 31, the plastic part with a protruding or recessed surface can be fixed. By fixing a rubber pad at the bottom of the pressure plate 32, hard contact between the plastic part and the pressure plate 32 can be avoided.

[0031] Example 2

[0032] like Figure 6 As shown, in this embodiment, the heating mechanism 4 includes a vertical plate 41, an electric heating tube 42 is detachably connected to the side of the vertical plate 41, the upper mold 1 is located inside the electric heating tube 42, a rectangular sleeve 43 is fixedly connected to the side of the vertical plate 41, a slider 44 is slidably sleeved inside the rectangular sleeve 43, and a fixed plate 45 is fixedly connected to the top of the slider 44 and is detachably connected to the moving plate on the punching machine.

[0033] In this embodiment, by energizing the electric heating element 42, the upper mold 1 can be heated. Then, by moving the moving plate of the punching machine downwards, the upper mold 1, the fixed plate 45, and the electric heating element 42 can be moved downwards (the vertical plate 41 moves downwards under its own gravity, and the internal cavity of the rectangular sleeve 43 has a convex structure). When the vertical plate 41 contacts the punching machine platform, the continued downward movement of the moving plate can cause the fixed plate 45 to slide downwards within the rectangular sleeve 43. At this time, the vertical plate 41 and the electric heating element 42 no longer move, and the upper mold 1 continues to move downwards to punch the waste material from the plastic part's gate. When the moving plate... During the movement, the upper mold 1 and the fixed plate 45 move upward under the action of the moving plate until the slider 44 moves to the top of the internal cavity of the rectangular sleeve 43. Then, the continued upward movement of the moving plate can drive the vertical plate 41 to move upward until the moving plate returns to its original position. By setting the internal cavity of the rectangular sleeve 43 into a convex structure and the fixed plate 45 sliding inside the rectangular sleeve, the electric heating tube 42 can stop moving when the vertical plate 41 contacts the punching machine table, while the upper mold 1 can continue to move under the action of the moving plate to complete the punching of the plastic part gate, avoiding the electric heating tube 42 from getting too close to the plastic part and causing deformation of the plastic part.

[0034] Example 3

[0035] like Figure 2 and Figure 3As shown, in this embodiment, the upper die 1 is composed of a punch holder 11 and a punch cutter 12. One end of the punch holder 11 is provided with a thread that is screwed into the punch cutter 12. The punch holder 11 is detachably connected to the moving plate of the punching machine. The lower die 2 is composed of a pad 21, a base 22 and a punch fixing seat 23. The pad 21 and the base 22 are fixed by bolts. The punch fixing seat 23 is fixed to the top of the pad 21 by bolts. The top of the base 22 is provided with a groove 24. A protrusion 25 is fixedly connected to the bottom of the groove 24. A through hole 26 is provided through the top of the protrusion 25 corresponding to the punch fixing seat 23.

[0036] In this embodiment, the punch holder 11 and the punch cutter 12 are threaded together, and the base 22 and the punch fixing seat 23 are bolted together with the pad 21 so that the punch cutter 12 can be replaced later. This facilitates the removal of waste material with the same plastic part size but different gate size. The base 22 has a groove 24 so that the plastic part can be stuck in the groove 24, which increases the stability of the plastic part.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cutting head fixture, comprising an upper die (1) and a lower die (2) fixed on a punching machine, characterized in that, The side of the lower mold (2) is provided with a fixing mechanism (3) for fixing the plastic part, and the bottom of the moving plate of the punching machine and located outside the upper mold (1) is provided with a heating mechanism (4) for heating the upper mold (1). The fixing mechanism (3) includes two symmetrical rotating frames (31) that are rotatably arranged on opposite sides of the lower mold (2). A pressure plate (32) is rotatably arranged at one end of the rotating frame (31). A limiting member for limiting the two rotating frames (31) is arranged between the opposite sides of the lower mold (2).

2. The cutting head fixture according to claim 1, characterized in that, A rotating seat (27) is fixedly connected between the two opposite sides of the lower mold (2) and a rotating frame (31) at the corresponding position via a rotating shaft. One end of the rotating shaft passes through the rotating seat (27) at the corresponding position and is fixedly connected to a gear (33). The limiting component includes two symmetrical racks (34) that are slidably connected to the two opposite sides of the lower mold (2). A rectangular sleeve (35) is fixedly connected to the two opposite sides of the lower mold (2). A shaped frame (36) slides through the two rectangular sleeves (35). The two ends of the shaped frame (36) are fixedly connected to the racks (34) at the corresponding positions.

3. The cutting head fixture according to claim 2, characterized in that, The top of the pressure plate (32) is fixedly connected to a rotating seat (37) that is rotatably connected to the rotating frame (31) at the corresponding position, and the bottom of the pressure plate (32) is fixedly connected to a rubber pad.

4. The cutting head fixture according to claim 3, characterized in that, The heating mechanism (4) includes a vertical plate (41), and an electric heating tube (42) is detachably connected to the side of the vertical plate (41). The upper mold (1) is located inside the electric heating tube (42).

5. The cutting head fixture according to claim 4, characterized in that, A rectangular sleeve (43) is fixedly connected to the side of the vertical plate (41). A slider (44) is slidably connected inside the rectangular sleeve (43). A fixed plate (45) is fixedly connected to the top of the slider (44) and is detachably connected to the moving plate on the punching machine.

6. The cutting head fixture according to claim 5, characterized in that, The upper die (1) consists of a punch holder (11) and a punch cutter (12). One end of the punch holder (11) is provided with a thread that engages with the punch cutter (12). The punch holder (11) is detachably connected to the moving plate of the punching machine.

7. The cutting head fixture according to claim 6, characterized in that, The lower die (2) consists of a pad (21), a base (22) and a punch holder (23). The pad (21) and the base (22) are fixed together by bolts. The punch holder (23) is fixed to the top of the pad (21) by bolts. The top of the base (22) has a groove (24). The bottom of the groove (24) is fixedly connected to a protrusion (25). The top of the protrusion (25) has a through hole (26) corresponding to the punch holder (23).

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