An apparatus for cutting a plastic cover after injection molding

Abstract

The present invention discloses a cutting device for plastic covers after injection molding, which includes a chassis. A rotating shaft is rotatably arranged inside the chassis. A plurality of trays are rotatably connected to the side wall of the rotating shaft. A storage groove is formed at the bottom inside the tray. A first spring is fixedly connected to the bottom inside the storage groove. The upper end of the first spring is fixedly connected to an iron top plate. A rotating mechanism for rotating the rotating shaft is installed on the rotating shaft. A support is fixedly connected to the side wall of the chassis, and a telescopic cylinder is fixedly installed on the support. Through the square sleeve pressing down on the upper end face of the plastic cover, and at the same time the first spring making the iron top plate abut against the inner end face of the plastic cover, only the cover plane of the plastic cover is acted on, and the plastic cover will not be deformed, ensuring the product quality of the plastic cover after the gate is cut off. The gate around the plastic cover is cut in a circumferential and gradually deepening manner, which can ensure that the cutting effect around the gate is uniform, improving the aesthetic effect of the plastic cover.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic pipe gate shearing, and particularly to a cutting device for plastic caps after injection molding. Background Art

[0002] After plastic products are injection molded, residues in the shape of gate channels mostly remain in the glue inlet areas of the products. Currently, the gate residues are generally cut off manually.

[0003] To improve the efficiency of gate cutting, a cutting device for plastic products with the patent application number "202021796126.1" discloses a cutting device for plastic products. When cutting the gate in this solution, two clamping plates move towards each other to clamp and fix the plastic products, and then cutting treatment is carried out. However, when cutting plastic caps, since the just injection-molded plastic caps are at a relatively high temperature and relatively soft texture, when the two clamping plates clamp the plastic caps, the plastic caps are likely to deform. After the gate is cut off and gradually cooled and fixed, it is difficult to match the corresponding bottles and cans due to the shape change, and at the same time, the sealing effect of the plastic caps themselves is also affected. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical defect that when two clamping plates clamp a plastic cap in the prior art, the plastic cap is likely to deform, and after the gate is cut off and gradually cooled and fixed, it is difficult to match the corresponding bottles and cans due to the shape change, and at the same time, the sealing effect of the plastic cap itself is also affected, and to propose a cutting device for plastic caps after injection molding.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A cutting device for plastic caps after injection molding includes a chassis. A rotating shaft is rotatably provided inside the chassis. A plurality of trays are rotatably connected to the side wall of the rotating shaft. A receiving groove is opened at the bottom inside the tray. A first spring is fixedly connected to the bottom inside the receiving groove. The upper end of the first spring is fixedly connected to an iron top plate. A rotating mechanism for rotating it is installed on the rotating shaft. A bracket is fixedly connected to the side wall of the chassis. A telescopic cylinder is fixedly installed on the bracket. The telescopic end of the telescopic cylinder is rotatably connected to a square sleeve. The upper end of the chassis is fixedly connected to a back-cutting ring through a connecting rod. The side wall of the square sleeve is connected to a back-cutting blade through a second spring. The back-cutting blade extends into the square sleeve. A guiding wheel is rotatably provided on the back-cutting blade. The guiding wheel rolls on the inner wall of the back-cutting ring, and the square sleeve is arranged at an eccentric position of the back-cutting ring. The square sleeve is connected to the rotating mechanism through a transmission mechanism.

[0007] Preferably, the rotating mechanism includes a first gear, a one-way bearing, a rack and a transverse movement cylinder. The first gear is connected to the rotating shaft through the one-way bearing. The transverse movement cylinder is fixedly installed on the side wall of the bracket. The telescopic end of the transverse movement cylinder is fixedly connected with an adapter plate. The rack is fixedly connected to the side wall of the adapter plate, and the rack meshes with the first gear.

[0008] Preferably, the transmission mechanism includes a second gear and a bracket. The second gear is rotatably arranged at the upper end of the bracket, and the second gear meshes with the first gear. The bracket is fixedly connected to the lower end of the bracket. A square through hole is opened at the upper end of the second gear, and the square sleeve is slidably arranged in the square through hole.

[0009] Preferably, a drum-shaped air bag is fixedly connected to the side wall of the adapter plate. One end of the drum-shaped air bag away from the adapter plate is fixedly connected to the side wall of the bracket. An exhaust pipe communicated with the drum-shaped air bag is also installed on the adapter plate.

[0010] Preferably, an inclined surface is provided on the chassis. The included angle between the inclined surface and the bottom surface of the chassis is 30°. A permanent magnet plate is embedded on the inclined surface.

[0011] Preferably, the depth of the storage groove is greater than the height of the iron top plate. Support rollers are rotatably arranged on the side wall of the tray.

[0012] Preferably, a protrusion is provided on the side wall of the back cutting edge. One end of the second spring is fixedly connected to the side wall of the square sleeve, and the other end of the second spring is fixedly connected to the protrusion.

[0013] The present invention has the following beneficial effects:

[0014] 1. By arranging the first spring and the iron top plate, the plastic cover placed on the tray can be positioned. During the cutting operation, the square sleeve presses down the upper end surface of the plastic cover, and at the same time, the first spring makes the iron top plate abut against the inner end surface of the plastic cover. Therefore, it only acts on the cover plane of the plastic cover and will not deform the plastic cover, ensuring the product quality of the plastic cover after cutting off the gate.

[0015] 2. By arranging a rotary back-cutting type shearing mechanism composed of a back-cutting ring, a back-cutting edge, a second spring and a guide wheel, the back-cutting edge can be driven to rotate along the inner wall of the eccentrically arranged back-cutting ring when the square sleeve rotates. In this way, the gate around the plastic cover can be cut in a circumferential and gradually deeper manner, ensuring that the cutting effect around the gate is uniform and consistent, and improving the aesthetic effect of the plastic cover.

[0016] 3. By setting a chassis with an inclined surface and a permanent magnet plate, during the operation of the device, when the cut plastic cover passes through the inclined surface area, the iron top plate can be automatically retracted into the storage groove, releasing the limit on the plastic cover. The processed plastic cover can slide down along the inclined surface by itself, and the user only needs to set up a collection box to complete the collection work of the plastic cover with the gate cut off.

[0017] 4. By setting a drum airbag and an exhaust pipe, during the operation of the device, the drum airbag can be continuously compressed, and air flow can be blown out from the exhaust pipe to blow off the cut gate with small mass and volume, so that the gate is quickly separated from the plastic cover. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a plastic cover injection molding and cutting device proposed by the present invention;

[0019] Figure 2 is Figure 1 an enlarged schematic diagram of the structure at A in

[0020] Figure 3 is Figure 2 a schematic cross-sectional structure diagram at B-B in

[0021] Figure 4 It is a top view structural diagram of the second gear and the square sleeve in the present invention;

[0022] Figure 5 It is a top view structural diagram of components such as the chassis, the rotating shaft, and the tray in the present invention;

[0023] Figure 6 It is a three-dimensional structural diagram of the chassis in the present invention.

[0024] In the figure: 1 chassis, 101 inclined surface, 2 rotating shaft, 3 tray, 4 storage groove, 5 first spring, 6 iron top plate, 7 plastic cover, 8 transverse moving cylinder, 9 telescopic cylinder, 10 connecting plate, 11 rack, 12 first gear, 13 one-way bearing, 14 second gear, 15 square sleeve, 16 square through hole, 17 connecting rod, 18 supporting roller, 19 back cutting ring, 20 second spring, 21 back cutting blade, 22 guiding wheel, 23 drum airbag, 24 exhaust pipe, 25 permanent magnet plate, 26 bracket, 27 support. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] Refer to Figures 1-6, an injection-molded plastic cap cutting device, including a chassis 1, a rotating shaft 2 is rotatably arranged inside the chassis 1, a plurality of trays 3 are rotatably connected to the side wall of the rotating shaft 2, a receiving groove 4 is opened at the bottom of the inner part of the tray 3, a first spring 5 is fixedly connected to the bottom of the inner part of the receiving groove 4, the depth of the receiving groove 4 is greater than the height of the iron top plate 6, and a supporting roller 18 is rotatably arranged on the side wall of the tray 3.

[0027] The upper end of the first spring 5 is fixedly connected with an iron top plate 6, a rotating mechanism for making it rotate is installed on the rotating shaft 2, a support 27 is fixedly connected to the side wall of the chassis 1, a telescopic cylinder 9 is fixedly installed on the support 27, the telescopic end of the telescopic cylinder 9 is rotatably connected with a square sleeve 15, the upper end of the chassis 1 is fixedly connected with a re-cutting ring 19 through a connecting rod 17, the side wall of the square sleeve 15 is connected with a re-cutting blade 21 through a second spring 20, and a protrusion is arranged on the side wall of the re-cutting blade 21. One end of the second spring 20 is fixedly connected to the side wall of the square sleeve 15, and the other end of the second spring 20 is fixedly connected to the protrusion.

[0028] Refer to Figure 2 , the re-cutting blade 21 extends into the square sleeve 15, a guide wheel 22 is rotatably arranged on the re-cutting blade 21, the guide wheel 22 is rollingly arranged on the inner wall of the re-cutting ring 19, and the square sleeve 15 is arranged at an eccentric position of the re-cutting ring 19. The square sleeve 15 is connected with the rotating mechanism through a transmission mechanism. There is an inclined surface 101 on the chassis 1, the included angle between the inclined surface 101 and the bottom surface of the chassis 1 is 30°, and a permanent magnet plate 25 is embedded on the inclined surface 101. It should be noted that the re-cutting ring 19 is arranged at a relatively high position. Therefore, when the tray 3 with the plastic cap 7 rotates to the left side of the chassis 1, it will only be under the re-cutting ring 19 and will not be blocked by the re-cutting ring 19.

[0029] Furthermore, as Figure 2 shown, the re-cutting blade 21 horizontally penetrates the side wall of the square sleeve 15 and can move left and right in the horizontal direction. And initially, in the natural elongation state of the second spring 20, the re-cutting blade 21 is on the right side of the square sleeve 15. When the square sleeve 15 moves down through the re-cutting ring 19, the guide wheel 22 on the re-cutting blade 21 just fits on the right inner wall of the re-cutting ring 19.

[0030] Refer to Figure 1, the rotating mechanism includes a first gear 12, a one-way bearing 13, a rack 11 and a transverse cylinder 8. The first gear 12 is connected to the rotating shaft 2 through the one-way bearing 13. The transverse cylinder 8 is fixedly installed on the side wall of the bracket 27. The telescopic end of the transverse cylinder 8 is fixedly connected with an adapter plate 10. The rack 11 is fixedly connected to the side wall of the adapter plate 10, and the rack 11 meshes with the first gear 12. By setting the one-way bearing 13, the torque of the first gear 12 can be transmitted to the rotating shaft 2 unidirectionally. Specifically, the rotating shaft 2 can rotate in the chassis 1 through a damping rotating shaft. In this way, when the first gear 12 rotates forward, it can overcome the frictional resistance of the damping rotating shaft and drive the rotating shaft 2 to rotate through the one-way bearing 13. When the first gear 12 rotates reversely, it cannot drive the rotating shaft 2 to rotate through the one-way bearing 13, and the rotating shaft 2 can maintain its angle unchanged under the action of the frictional resistance of the damping rotating shaft.

[0031] A drum-shaped air bag 23 is fixedly connected to the side wall of the adapter plate 10. One end of the drum-shaped air bag 23 away from the adapter plate 10 is fixedly connected to the side wall of the bracket 26. An exhaust pipe 24 communicating with the drum-shaped air bag 23 is also installed on the adapter plate 10.

[0032] Referring to Figure 1 and Figure 4 , the transmission mechanism includes a second gear 14 and a bracket 26. The second gear 14 is rotatably arranged at the upper end of the bracket 26. Specifically, the second gear 14 can be rotatably arranged on the bracket 26 through supporting components such as bearings. At the same time, as Figure 1 shown, a relatively large through hole is provided on the bracket 26, so that the up-and-down movement of the square sleeve 15 is not hindered.

[0033] And the second gear 14 meshes with the first gear 12. The bracket 26 is fixedly connected to the lower end of the bracket 27. A square through hole 16 is opened at the upper end of the second gear 14. The square sleeve 15 is slidably arranged in the square through hole 16. As Figure 4 shown, the inner wall of the square through hole 16 is in close fit with the outer wall of the square sleeve 15. Therefore, when the second gear 14 rotates, it can drive the square sleeve 15 to rotate synchronously, and when the square sleeve 15 moves up and down, it can freely enter and exit the square through hole 16 without being hindered.

[0034] When using this device, after placing the plastic cover 7 to be processed on the right tray 3, it can fall above the iron top plate 6, and the iron top plate 6 positions the plastic cover 7. Subsequently, operate the transverse cylinder to push the adapter plate 10 and the rack 11 to move leftward. In this way, the first gear 12 can rotate forward. In this direction, the first gear 12 can drive the rotating shaft 2 to rotate through the one-way bearing 13, and the rotating shaft 2 rotates the tray 3 with the plastic cover 7 on the right to the left.

[0035] At this time, the telescopic cylinder 9 will push the square sleeve 15 downward, then the lower end of the square sleeve 15 will press down on the upper end surface of the plastic cover 7, and the first spring 5 will contract a certain distance. The first spring 5 can press against the inner end surface of the plastic cover 7 through the iron top plate 6, so as to fix the plastic cover 7. And when the downward movement of the square sleeve 15 is completed, in the natural elongation state of the second spring 20, the guide wheel 22 just abuts against the inner wall of the back-cutting ring 19. At this time, the transverse movement cylinder 8 pulls the connecting plate 10 and the rack 11 to move rightward and reset, so as to drive the first gear 12 to rotate reversely. In this direction, the first gear 12 cannot drive the rotating shaft 2 to rotate through the one-way bearing 13. The rotating shaft 2 remains unchanged in angle under the action of the damping rotating shaft, and the first gear 12 will also drive the second gear 14 to rotate. Due to the square matching structure of the square sleeve 15 and the square through hole 16, as Figure 4 shown, when the second gear 14 rotates, it can drive the square sleeve 15 to rotate, and when the square sleeve 15 rotates, it can drive the back-cutting blade 21 on it to rotate around its axis. Since the square sleeve 15 and the back-cutting ring 19 are eccentrically arranged, during the rotation of the square sleeve 15, the guide wheel 22 on the back-cutting blade 21 rolls along the inner wall of the back-cutting ring 19. From Figure 2 and Figure 3 it is not difficult to see that the left side between the square sleeve 15 and the back-cutting ring 19 is narrow and the right side is wide. Therefore, when the guide wheel 22 rolls along the inner wall of the back-cutting ring 19, it will push the back-cutting blade 21 to move towards the axis direction of the square sleeve 15. The back-cutting blade 21 moves towards the center of the plastic cover 7 while rotating, so as to remove the gate above the plastic cover 7. Compared with the traditional direct shearing method, this device can perform a circumferential and depth-by-depth cutting around the gate above the plastic cover 7, which can ensure that the cutting effect around the gate is uniform and improve the aesthetic effect of the plastic cover 7 after cutting.

[0036] When the rack 11 moves rightward and drives the first gear 12 to rotate reversely and is completed, it just makes the second gear 14 and the square sleeve 15 rotate one week, then the back-cutting blade 21 and the guide wheel 22 on the square sleeve 15 return to the Figure 2 shown initial state. At this time, the telescopic cylinder 9 pulls the square sleeve 15 to move upward and reset, and the square sleeve 15 can freely pass through the square through hole 16 to move in the vertical direction.

[0037] Subsequently, the transverse movement cylinder 8 again pushes the connecting plate 10 and the rack 11 to move leftward. When the connecting plate 10 moves leftward, it will also squeeze the air bag 23 and squeeze the air in the air bag 23 out through the exhaust pipe 24. Thus, the air flow blown out by the exhaust pipe 24 can blow off the cut gate part on the plastic cover 7, so that the gate is quickly separated from the plastic cover 7 (the exhaust pipe 24 can adopt a telescopic corrugated pipe, and the air outlet end of the exhaust pipe 24 is fixed near the left tray 3, so that the blown air flow can always blow towards the gate of the plastic cover 7).

[0038] And from the above, when the rack 11 moves leftward and drives the first gear 12 to rotate forward, the rotating shaft 2 can be driven to rotate forward through the one-way bearing 13. It should be noted that at this time, the first gear 12 still drives the second gear 14 to rotate. After the leftward movement of the rack 11 is completed and the rotation of the first gear 12 is completed, the second gear 14 just rotates one week. Therefore, the square sleeve 15 also rotates one week accordingly. Thus, the return cutting edge 21 and the guide wheel 22 can still return to Figure 2 the initial state, so it does not affect the next use.

[0039] Then the rotating shaft 2 can drive each tray 3 to rotate forward. The tray 3 can move along the bottom surface of the chassis 1 by relying on the supporting rollers 18. When the tray 3 with the processed plastic cover 7 walks to the inclined surface 101 part of the chassis 1, referring to Figure 5 and Figure 6 , under the action of gravity, the tray 3 will deflect downward by a certain angle. At the same time, the permanent magnet plate 25 on the inclined surface 101 is closest to the iron top plate 6. In this way, the elastic force of the first spring 5 can be overcome, so as to attract the iron top plate 6 to move downward and make the iron top plate 6 enter the receiving groove 4. Then the iron top plate 6 no longer presses against the plastic cover 7. After the plastic cover 7 loses the block of the iron top plate 6, it will slide down along the inclined surface 101. Therefore, the user only needs to set a collection box at the outlet of the inclined surface 101 to complete the collection work of the plastic cover 7 after the gate is sheared.

[0040] In summary, the present device can automatically shear the gate part of the plastic cover 7, and the periphery of the sheared gate is uniform, improving the aesthetic effect after the plastic cover 7 is cut. At the same time, the plastic cover 7 will not be deformed during the shearing process, ensuring the use and sealing effect of the plastic cover 7. More prominently, it can automatically separate the plastic cover 7 from the gate and can also collect the sheared plastic cover 7.

[0041] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An injection-molded plastic cap cutting device, comprising a chassis (1), characterized in that, A rotating shaft (2) is rotatably arranged inside the chassis (1). A plurality of trays (3) are rotatably connected to the side wall of the rotating shaft (2). A storage groove (4) is formed in the inner bottom of the tray (3). A first spring (5) is fixedly connected to the inner bottom of the storage groove (4). An iron top plate (6) is fixedly connected to the upper end of the first spring (5). A rotating mechanism for rotating the rotating shaft (2) is installed on the rotating shaft (2). A bracket (27) is fixedly connected to the side wall of the chassis (1). A telescopic cylinder (9) is fixedly installed on the bracket (27). The telescopic end of the telescopic cylinder (9) is rotatably connected to a square sleeve (15). A return cutting ring (19) is fixedly connected to the upper end of the chassis (1) through a connecting rod (17). A return cutting blade (21) is connected to the side wall of the square sleeve (15) through a second spring (20). The return cutting blade (21) extends into the square sleeve (15). A guide wheel (22) is rotatably arranged on the return cutting blade (21). The guide wheel (22) is rollingly arranged on the inner wall of the return cutting ring (19). And the square sleeve (15) is arranged at an eccentric position of the return cutting ring (19). The square sleeve (15) is connected to the rotating mechanism through a transmission mechanism; The rotating mechanism includes a first gear (12), a one-way bearing (13), a rack (11) and a transverse movement cylinder (8). The first gear (12) is connected to the rotating shaft (2) through the one-way bearing (13). The transverse movement cylinder (8) is fixedly installed on the side wall of the bracket (27). The telescopic end of the transverse movement cylinder (8) is fixedly connected to an adapter plate (10). The rack (11) is fixedly connected to the side wall of the adapter plate (10). And the rack (11) meshes with the first gear (12); The transmission mechanism includes a second gear (14) and a bracket (26). The second gear (14) is rotatably arranged on the upper end of the bracket (26). And the second gear (14) meshes with the first gear (12). The bracket (26) is fixedly connected to the lower end of the bracket (27). A square through hole (16) is formed in the upper end of the second gear (14). The square sleeve (15) is slidably arranged in the square through hole (16).

2. The plastic cover injection-molding and cutting device according to claim 1, wherein An air bag (23) is fixedly connected to the side wall of the adapter plate (10). One end of the air bag (23) away from the adapter plate (10) is fixedly connected to the side wall of the bracket (26). An exhaust pipe (24) communicated with the air bag (23) is also installed on the adapter plate (10).

3. The plastic cover injection-molding and cutting device according to claim 1, characterized in that, An inclined surface (101) is provided on the chassis (1). The included angle between the inclined surface (101) and the bottom surface of the chassis (1) is 30°. A permanent magnet plate (25) is embedded on the inclined surface (101).

4. A plastic cap injection-molding and cutting device according to claim 1, wherein, The depth of the storage groove (4) is greater than the height of the iron top plate (6). Support rollers (18) are rotatably arranged on the side wall of the tray (3).

5. A plastic cap injection-molding and cutting device according to claim 1, characterized in that, Protrusions are provided on the side wall of the return cutting blade (21). One end of the second spring (20) is fixedly connected to the side wall of the square sleeve (15). The other end of the second spring (20) is fixedly connected to the protrusion.

Images