Multi-mold plastic product manufacturing device and manufacturing method thereof

Abstract

The invention discloses a multi-mold plastic product manufacturing device and a manufacturing method thereof, and relates to the technical field of intelligent equipment.The device comprises a base, a first support, a second support and a third support are fixed to the base, the first support, the second support and the third support are annularly distributed, and the included angles among the first support, the second support and the third support are equal; a rotating frame is fixed to the top of the base, a connecting frame is rotationally connected into the rotating frame, a driving motor is connected to the bottom of the connecting frame, a timing switch control module is electrically connected to the driving motor, the driving motor is installed on the base, supporting frames are fixed to the connecting frame in the circumferential direction, and a mold assembly is installed at the end, away from the connecting frame, of each supporting frame through screws. A cooling piece is fixed to the top of the second support, and a material taking piece is slidably connected to the side face of the third support; the manufacturing device can integrate injection molding, cooling, material taking and material collecting of the plastic products, can be suitable for simultaneous continuous production of different molds, and effectively improves the processing efficiency of the plastic products.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent devices, and particularly relates to a plastic product manufacturing device with multiple molds and a manufacturing method thereof. Background Art

[0002] Currently, when manufacturing plastic products, an injection molding machine is usually used for injection molding of plastic products. However, the current injection molding machine can only install one mold, resulting in low efficiency in manufacturing plastic products. Moreover, when manufacturing plastic products of different specifications, the mold needs to be replaced, which is time-consuming and prone to safety accidents due to the heavy weight of the mold. Therefore, it is particularly important to solve the problems of low working efficiency of the injection molding machine and waste of time in replacing the mold. Summary of the Invention

[0003] The purpose of the present invention is to provide a plastic product manufacturing device with multiple molds and a manufacturing method thereof. The manufacturing device can integrate injection molding, cooling, material taking and material collecting of plastic products, and can be applicable to simultaneous continuous production of different molds, effectively improving the processing efficiency of plastic products; the method has a high overall intelligent level, reduces the manual operation cost and improves the production efficiency.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A plastic product manufacturing device with multiple molds, including a base. A first bracket, a second bracket and a third bracket are fixed on the base. The first bracket, the second bracket and the third bracket are distributed in a ring shape, and the angles between them are equal. A rotating frame is fixed at the top of the base. A connecting frame is rotatably connected inside the rotating frame. A driving motor is connected to the bottom of the connecting frame. The driving motor is electrically connected to a timing switch control module. The driving motor is installed on the base. Support frames are fixed along the circumferential direction of the connecting frame. There are four support frames. Each support frame is screwed with a mold assembly at the end far from the connecting frame. An injection molding part is rotatably connected to the side of the first bracket. A cooling part is fixed on the top of the second bracket. A material taking part is slidably connected to the side of the third bracket.

[0005] As a preferred solution of the present invention, the mold assembly includes a lower mold screwed to the support frame, and further includes a support rod fixed to the side of the support frame. A cylinder is fixed at the end of the support rod far from the support frame. A piston rod is fixed to the output end of the cylinder. A connecting rod is fixed to the end of the piston rod far from the support rod. An upper mold is fixed to the end of the connecting rod far from the piston rod. An injection port is provided at the top of the upper mold. An injection connection part is fixed to the top of the upper mold outside the injection port. A plurality of guide rods are fixed to the top of the lower mold, and the guide rods are slidably connected inside the upper mold.

[0006] As a preferred embodiment of the present invention, the injection - molded connector includes a fixed tube fixed to the top of the upper mold. A connecting sleeve is slidably connected to the top of the fixed tube. The connecting sleeve is a combined structure made of metal at the bottom and rubber at the top. A conical side is provided at the top of the connecting sleeve. A chute for the fixed tube to slide is provided near the bottom end of the connecting sleeve. A plurality of springs are fixed inside the chute, and the other ends of the springs are fixed to the top of the fixed tube.

[0007] As a preferred embodiment of the present invention, the injection - molded part includes a first groove opened on the side of the first bracket. A first drive shaft is rotatably connected inside the first groove. One end of the first drive shaft is fixed with a first servo - motor. The first servo - motor is electrically connected to a first infrared sensor module. The first infrared sensor module is fixed on the inner side of the first bracket facing the base. A first sleeve is fixed on the outer side of the first drive shaft. A first swing arm is fixed on the side of the first sleeve. An injection tube is fixed at the end of the first swing arm away from the first sleeve. One end of the injection tube is connected to a telescopic pipe fitting, and the telescopic pipe fitting is externally connected to an injection molding machine.

[0008] As a preferred embodiment of the present invention, a connecting pipe is fixed on the side of the injection tube, and a solenoid valve is fixed on the side of the connecting pipe.

[0009] As a preferred embodiment of the present invention, the cooling part includes a cooling pipe fixed to the top of the second bracket. The cooling pipe is arranged in an arc shape. There are two cooling pipes with the same center of the circle. Symmetrically arranged installation pipes are fixed between the two cooling pipes. A water inlet pipe and a water outlet pipe are respectively fixed at the bottoms of the two installation pipes. It also includes load - bearing rods fixed to the bottom of the support frame and fixed to the bottom of the lower mold. Metal blocks are fixed inside the two load - bearing rods. A through - groove is provided inside the metal block, and the diameter of the through - groove matches the diameter of the cooling pipe. A metal plate is fixed at the end of the metal block away from the load - bearing rod, and the metal plate is embedded inside the lower mold. The part of the load - bearing rod near the metal block is provided with a heat - insulating cotton board, and the load - bearing rod and the metal block are adhesively fixed.

[0010] As a preferred embodiment of the present invention, the material - taking part includes a second groove opened on the side of the third bracket. A second drive shaft is rotatably connected inside the second groove. One end of the second drive shaft is fixed with a second servo - motor. The second servo - motor is electrically connected to a second infrared sensor module. The second infrared sensor module is fixed on the inner side of the third bracket facing the base. A second sleeve is fixed on the outer side of the second drive shaft. A second swing arm is fixed on the side of the second sleeve. A suction plate is fixed at the end of the second swing arm away from the second sleeve. A suction pump is fixed on the suction plate. A suction cup is fixed to the bottom of the suction plate on the side opposite to the suction pump. A plurality of suction cups are arranged along the circumferential direction of the suction plate. The suction pump is communicated with the suction plate, and the suction cup is also in a communicated state with the suction plate. It also includes an aggregate box fixed on one side of the third bracket.

[0011] The present invention also discloses a manufacturing method for plastic products with multiple molds, which specifically includes the following steps: ①Adjust the length of the support frame according to the injection molding time required. At the same time, set the interval control time of the timing switch control module according to the length of the support frame and the power of the driving motor to control the timed start and stop of the driving motor. ②Turn on the driving motor and the timing switch control module, and set the time for the driving motor to drive the connecting frame by 90° as the control time of the timing switch control module. ③Connect the telescopic pipe fitting to the external injection molding machine, connect the water inlet pipe and the water outlet pipe to the external cold water circulation system, and turn on the servo motor and the suction pump at the same time. ④When one of the lower mold and the upper mold moves to the side of the first support, the first infrared sensor module generates an electrical signal. Based on the existing PLC control system, control the first servo motor to turn on. The servo motor drives the injection pipe to move above the connecting sleeve, and the connecting pipe enters the inside of the connecting sleeve, and turn on the solenoid valve for injection molding. ⑤After the time node of the timing switch control module arrives, the upper mold and the lower mold during injection molding start to be rotationally driven and move to the cooling pipe. The cooling pipe starts to enter the through groove inside the metal block. The cold is absorbed by the metal block contacting the cooling pipe and further transmitted by the metal plate to cool the formed part inside the mold. At the same time, the next lower mold and upper mold move to the side of the first support. ⑥After passing through the cooling pipe, the lower mold and the upper mold move to the side of the third support. The second infrared sensor module generates an electrical signal. Based on the existing PLC control system, control the second servo motor to turn on and drive the suction plate to move between the upper mold and the lower mold. At the same time, during the process of the lower mold and the upper mold moving to the third support, the cylinder drives the upper mold to move upward and separate from the lower mold. ⑦Turn on the suction pump, use the suction cup to take out the formed plastic part. With the driving motor turned on again, the second servo motor drives the reset, turn off the suction pump on the suction plate, and the formed plastic part falls into the lower aggregate box for collection. ⑧The driving motor continuously opens and closes, repeating the above operations to complete the integrated manufacturing process of injection molding, cooling, material taking and aggregate collection.

[0012] In summary, the beneficial technical effects of the present invention are as follows: The manufacturing device can integrate the injection molding, cooling, material taking and aggregate collection of plastic products, and the whole process is controlled automatically. At the same time, multiple molds are set, which can be applied to the simultaneous continuous production of different molds, effectively improving the processing efficiency of plastic products; The overall intelligent level of this method is high, reducing the labor operation cost and improving the production efficiency. Description of the Drawings

[0013] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation to the present invention. In the drawings: Figure 1 It is a schematic structural diagram of a plastic product manufacturing device with multiple molds in this embodiment. Figure 2 It is a schematic structural diagram of a mold assembly of a plastic product manufacturing device with multiple molds in this embodiment; Figure 3 It is a Figure 1 second perspective schematic diagram of a plastic product manufacturing device with multiple molds in this embodiment; Figure 4 It is a Figure 1 third perspective schematic diagram of a plastic product manufacturing device with multiple molds in this embodiment; Figure 5 It is a Figure 2 magnified schematic diagram at position A in this embodiment of a plastic product manufacturing device with multiple molds; Figure 6 It is a Figure 3 magnified schematic diagram at position B in this embodiment of a plastic product manufacturing device with multiple molds; Figure 7 It is a Figure 4 magnified schematic diagram at position C in this embodiment of a plastic product manufacturing device with multiple molds; Figure 8 It is a schematic cross - sectional view of a fixed pipe of a plastic product manufacturing device with multiple molds in this embodiment.

[0014] In the figure: 1. Base; 2. First bracket; 3. Second bracket; 4. Third bracket; 5. Rotating frame; 6. Connecting frame; 7. Driving motor; 8. Support frame; 9. Lower mold; 10. Support rod; 11. Cylinder; 12. Piston rod; 13. Connecting rod; 14. Upper mold; 15. Guide rod; 16. Fixed pipe; 17. Connecting sleeve; 18. Spring; 19. First groove; 20. First driving shaft; 21. First servo motor; 22. First infrared sensor module; 23. First sleeve; 24. First swing arm; 25. Injection pipe; 26. Connecting pipe; 27. Solenoid valve; 28. Cooling pipeline; 29. Installation pipe; 30. Water inlet pipe; 31. Water outlet pipe; 32. Bearing rod; 33. Metal block; 34. Through groove; 35. Metal plate; 36. Second groove; 37. Second driving shaft; 38. Second servo motor; 39. Second infrared sensor module; 40. Second sleeve; 41. Second swing arm; 42. Suction plate; 43. Suction pump; 44. Suction cup; 45. Aggregate box. Detailed implementation manners

[0015] The following further elaborates on the present invention in conjunction with the accompanying drawings.

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figures 1 - 8 , the present invention provides a technical solution: a plastic product manufacturing device with multiple molds, including a base 1, on which a first bracket 2, a second bracket 3, and a third bracket 4 are fixed. The first bracket 2, the second bracket 3, and the third bracket 4 are annularly distributed, and the angles between them are equal. A rotating frame 5 is fixed on the top of the base 1. Inside the rotating frame 5, a connecting frame 6 is rotatably connected. The bottom of the connecting frame 6 is connected to a driving motor 7. The driving motor 7 is electrically connected to a timing switch control module. The driving motor 7 is installed on the base 1. Along the circumferential direction, the connecting frame 6 is fixed with four support frames 8. At the end of each support frame 8 away from the connecting frame 6, a mold assembly is installed by screws. On the side of the first bracket 2, an injection molding part is rotatably connected. On the top of the second bracket 3, a cooling part is fixed. On the side of the third bracket 4, a material taking part is slidably connected.

[0018] The mold assembly includes a lower mold 9 fixed to the support frame 8 by screws, and further includes a support rod 10 fixed to the side of the support frame 8. At the end of the support rod 10 away from the support frame 8, a cylinder 11 is fixed. The output end of the cylinder 11 is fixed with a piston rod 12. At the end of the piston rod 12 away from the support rod 10, a connecting rod 13 is fixed. At the end of the connecting rod 13 away from the piston rod 12, an upper mold 14 is fixed. An injection port is provided on the top of the upper mold 14. An injection connection part is fixed to the top of the upper mold 14 outside the injection port. On the top of the lower mold 9, a plurality of guide rods 15 are fixed, and the guide rods 15 are slidably connected inside the upper mold 14.

[0019] After the cylinder 11 is opened, by driving the lifting of the piston rod 12, the separation and coincidence of the upper mold 14 and the lower mold 9 can be driven. In the coincident state, after passing through the injection molding part and the cooling part, and after entering the range of the material taking part, the separation of the upper mold 14 and the lower mold 9 is controlled.

[0020] Among them, the injection connection part includes a fixed pipe 16 fixed to the top of the upper mold 14. A connecting sleeve 17 is slidably connected to the top of the fixed pipe 16. The connecting sleeve 17 is a combined structure made of metal at the bottom and rubber at the top. A conical side is provided at the top of the connecting sleeve 17. A sliding groove for the fixed pipe 16 to slide is provided near the bottom end of the connecting sleeve 17. A plurality of springs 18 are fixed inside the sliding groove, and the other ends of the springs 18 are fixed to the top of the fixed pipe 16.

[0021] The injection molded part includes a first groove 19 formed on the side surface of the first bracket 2. A first drive shaft 20 is rotatably connected inside the first groove 19. One end of the first drive shaft 20 is fixed with a first servo motor 21. The first servo motor 21 is electrically connected to a first infrared sensor module 22. The first infrared sensor module 22 is fixed on the inner side of the first bracket 2 facing the base 1. A first sleeve 23 is fixed on the outer side of the first drive shaft 20. A first swing arm 24 is fixed on the side surface of the first sleeve 23. The end of the first swing arm 24 away from the first sleeve 23 is fixed with an injection molding pipe 25. One end of the injection molding pipe 25 is connected to a telescopic pipe fitting, and the telescopic pipe fitting is externally connected to an injection molding machine. After the first servo motor 21 is driven, it can control the rotation of the first sleeve 23, drive the rotation of the first swing arm 24. The first swing arm 24 moves in a circular trajectory with the axis of the first drive shaft 20 as the center. Thus, when the upper mold 14 and the lower mold 9 move to the side of the first bracket 2, the first swing arm 24 can be controlled to move above the upper mold 14. After the upper mold 14 and the lower mold 9 move away, the first swing arm 24 can be reset.

[0022] A connecting pipe 26 is fixed on the side surface of the injection molding pipe 25, and a solenoid valve 27 is fixed on the side surface of the connecting pipe 26.

[0023] After the top side of the connecting sleeve 17 is touched, due to the tapered side surface provided at the top, as the movement continues after being touched, it can gradually enter the inside of the connecting sleeve 17 along the tapered side surface. And the top is made of rubber material, which has a certain resilience. Therefore, after entering the connecting sleeve 17, it can reset and wrap around the outside of the connecting pipe 26. At the same time, in order to further fit the connecting pipe 26 into the inside of the connecting sleeve 17, the connecting sleeve 17 and the fixed pipe 16 are of a slidable structure, and a spring 18 is arranged inside to assist the connecting sleeve 17 to reset, thereby improving the sealing performance during injection molding.

[0024] In this embodiment, the first servo motor 21 is controlled to open and close through the first infrared sensor module 22. Specifically, according to actual requirements, different numbers of first infrared sensor modules 22 are set. Its principle is based on existing control technologies. When it detects the upper mold 14 and the lower mold 9 on the side surface of the first bracket 2, the height of the first infrared sensor module 22 is set to be the same as the height of the side surface of the upper mold 14. Thus, after the first infrared sensor module 22 detects that an object is approaching, its electrical signal changes. At the same time, based on existing pulse signal control, when the upper mold 14 and the lower mold 9 approach the first bracket 2, the first servo motor 21 controls the swing arm to rotate to a position above the upper mold 14. After the connecting pipe 26 enters the inside of the connecting sleeve 17, the solenoid valve 27 is opened for injection molding.

[0025] The cooling member includes a cooling pipe 28 fixed to the top of the second bracket 3. The cooling pipe 28 is arranged in an arc shape. There are two cooling pipes 28 with the same center of the circle. Symmetrically arranged mounting pipes 29 are fixed between the two cooling pipes 28. An inlet pipe 30 and an outlet pipe 31 are respectively fixed to the bottoms of the two mounting pipes 29. It also includes load-bearing rods 32 fixed to the bottom of the support frame 8 and fixed to the bottom of the lower mold 9. Metal blocks 33 are fixed inside the two load-bearing rods 32. A through groove 34 is provided inside the metal block 33. The aperture of the through groove 34 matches the diameter of the cooling pipe 28. A metal plate 35 is fixed to the end of the metal block 33 away from the load-bearing rod 32. The metal plate 35 is embedded inside the lower mold 9. The part of the load-bearing rod 32 close to the metal block 33 is provided with a heat-insulating cotton board. The load-bearing rod 32 and the metal block 33 are adhesively fixed.

[0026] Cold water circulates inside the cooling pipe 28 through the inlet pipe 30 and the outlet pipe 31. Inside the through hole where the cooling pipe 28 is located, the cold quantity on the surface of the cooling pipe 28 is conducted to the metal plate 35 through the metal block 33, thereby reducing the temperature of the overall lower mold 9 and enabling the plastic parts inside to be quickly cooled. Moreover, the part where the metal block 33 contacts the load-bearing rod 32 is provided with a heat-insulating cotton board, which can further prevent the cold quantity from dissipating too quickly.

[0027] Among them, the material taking member includes a second groove 36 opened on the side of the third bracket 4. A second drive shaft 37 is rotatably connected inside the second groove 36. A second servo motor 38 is fixed to one end of the second drive shaft 37. The second servo motor 38 is electrically connected to a second infrared sensor module 39. The second infrared sensor module 39 is fixed to the inner side of the third bracket 4 facing the base 1. A second sleeve 40 is fixed to the outside of the second drive shaft 37. A second swing arm 41 is fixed to the side of the second sleeve 40. A suction plate 42 is fixed to the end of the second swing arm 41 away from the second sleeve 40. A suction pump 43 is fixed on the suction plate 42. A suction cup 44 is provided on the side opposite to the suction pump 43 and is fixed to the bottom of the suction plate 42. A plurality of suction cups 44 are arranged along the circumferential direction of the suction plate 42. The suction pump 43 is communicated with the suction plate 42, and the suction cup 44 is also in a communicated state with the suction plate 42. It also includes an aggregate box 45 fixed to one side of the third bracket 4. In this embodiment, the driving ranges of the first servo motor 21 and the second servo motor 38 are both 90°, that is, the first swing arm 24 and the second swing arm 41 can reciprocally rotate within the range of 90°.

[0028] Similar to the control method of the first servo motor 21 as described above, the installation height of the second swing arm 41 is at the position between the upper mold 14 and the lower mold 9. After the upper mold 14 and the lower mold 9 are separated, it extends between the two, and adsorbs the plastic parts by suction. After the upper mold 14 and the lower mold 9 are moved away, the second swing arm 41 resets. At the same time, the suction pump 43 can be turned off to release the adsorption force between the suction cup 44 and the plastic parts, and the plastic parts can automatically fall into the aggregate box 45 for collection and subsequent processing.

[0029] In this embodiment, for the specific manufacturing method of plastic products with multiple molds, the above-mentioned manufacturing device for plastic products with multiple molds is adopted, which includes the following steps: ① According to the injection molding time required, adjust the length of the support frame 8. At the same time, according to the length of the support frame 8 and the power of the driving motor 7, set the interval control time of the timing switch control module to control the timing start and stop of the driving motor 7; ② Turn on the driving motor 7 and the timing switch control module, and set the time for the driving motor 7 to drive the connecting frame 6 to rotate 90° as the control time of the timing switch control module; ③ Connect the telescopic pipe fitting to an external injection molding machine, connect the water inlet pipe 30 and the water outlet pipe 31 to an external cold water circulation system, and at the same time turn on the servo motor and the suction pump 43; ④ When one of the lower molds 9 and the upper mold 14 move to the side of the first bracket 2, the first infrared sensor module 22 generates an electrical signal. Based on the existing PLC control system, control the first servo motor 21 to turn on. The servo motor drives the injection pipe 25 to move above the connecting sleeve 17, and the connecting pipe 26 enters the inside of the connecting sleeve 17, and turn on the solenoid valve 27 for injection molding; ⑤ After the time node of the timing switch control module arrives, the upper mold 14 and the lower mold 9 during injection molding start to be rotationally driven and move to the cooling pipe 28. The cooling pipe 28 starts to enter the through groove 34 inside the metal block 33. The metal block 33 contacts the cooling pipe 28 to absorb the cold quantity, and further transfers it through the metal plate 35 to cool the molded part inside the mold. At the same time, the next lower mold 9 and the upper mold 14 move to the side of the first bracket 2; ⑥ After passing through the cooling pipe 28, the lower mold 9 and the upper mold 14 move to the side of the third bracket 4. The second infrared sensor module 39 generates an electrical signal. Based on the existing PLC control system, control the second servo motor 38 to turn on, drive the suction plate 42 to move between the upper mold 14 and the lower mold 9. At the same time, during the process of the lower mold 9 and the upper mold 14 moving to the third bracket 4, the cylinder 11 drives the upper mold 14 to move upward and separate from the lower mold 9; ⑦ Turn on the suction pump 43, use the suction cup 44 to take out the molded plastic part. As the driving motor 7 is turned on again, the second servo motor 38 drives the reset, turn off the suction pump 43 on the suction plate 42, and the molded plastic part falls into the lower aggregate box 45 for collection; ⑧ Continuously open and close the driving motor 7, repeat the above operations to complete the integrated manufacturing process of injection molding, cooling, material taking and aggregate collection.

[0030] Particularly, in this embodiment, electrical devices such as motors, cylinders, solenoid valves and suction pumps can be coded according to actual needs based on the existing PLC control system, so that the above-mentioned mechanical structure can achieve the integrated manufacturing process of injection molding, cooling, material taking and aggregate collection.

[0031] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0032] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A plastic product manufacturing device based on multiple molds, characterized in that, It includes a base (1), on which a first bracket (2), a second bracket (3) and a third bracket (4) are fixed. The first bracket (2), the second bracket (3) and the third bracket (4) are annularly distributed, and the angles between them are equal. A rotating frame (5) is fixed on the top of the base (1). A connecting frame (6) is rotatably connected inside the rotating frame (5). The bottom of the connecting frame (6) is connected with a driving motor (7). The driving motor (7) is electrically connected with a timing switch control module. The driving motor (7) is installed on the base (1). Support frames (8) are fixed along the circumferential direction of the connecting frame (6). There are four support frames (8). A mold assembly is screwed at the end of each support frame (8) away from the connecting frame (6). An injection molding part is rotatably connected to the side of the first bracket (2). A cooling part is fixed on the top of the second bracket (3). A material taking part is slidably connected to the side of the third bracket (4).

2. The plastic product manufacturing device based on multiple molds according to claim 1, wherein The mold assembly includes a lower mold (9) screwed to the support frame (8), and also includes a support rod (10) fixed to the side of the support frame (8). A cylinder (11) is fixed at the end of the support rod (10) away from the support frame (8). A piston rod (12) is fixed to the output end of the cylinder (11). A connecting rod (13) is fixed at the end of the piston rod (12) away from the support rod (10). An upper mold (14) is fixed at the end of the connecting rod (13) away from the piston rod (12). An injection port is provided at the top of the upper mold (14). An injection connecting part is fixed to the top of the upper mold (14) outside the injection port. A plurality of guide rods (15) are fixed to the top of the lower mold (9). The guide rods (15) are slidably connected inside the upper mold (14).

3. The plastic product manufacturing device based on multiple molds according to claim 2, characterized in that, The injection connecting part includes a fixed pipe (16) fixed to the top of the upper mold (14). A connecting sleeve (17) is slidably connected to the top of the fixed pipe (16). The connecting sleeve (17) is a combined structure made of metal at the bottom and rubber at the top. A conical side is provided at the top of the connecting sleeve (17). A sliding groove for the fixed pipe (16) to slide is provided near the bottom end of the connecting sleeve (17). A plurality of springs (18) are fixed inside the sliding groove. The other ends of the springs (18) are fixed to the top of the fixed pipe (16).

4. The plastic product manufacturing device based on multiple molds according to claim 1, characterized in that, The injection molding part includes a first groove (19) opened on the side of the first bracket (2). A first driving shaft (20) is rotatably connected inside the first groove (19). A first servo motor (21) is fixed to one end of the first driving shaft (20). The first servo motor (21) is electrically connected with a first infrared sensor module (22). The first infrared sensor module (22) is fixed to the inner side of the first bracket (2) facing the base (1). A first sleeve (23) is fixed to the outside of the first driving shaft (20). A first swing arm (24) is fixed to the side of the first sleeve (23). An injection molding pipe (25) is fixed to the end of the first swing arm (24) away from the first sleeve (23). One end of the injection molding pipe (25) is connected with a telescopic pipe fitting, and the telescopic pipe fitting is externally connected to an injection molding machine.

5. The plastic product manufacturing device based on multiple molds according to claim 4, characterized in that, A connecting pipe (26) is fixed to the side of the injection molding pipe (25). A solenoid valve (27) is fixed to the side of the connecting pipe (26).

6. The plastic product manufacturing device based on multiple molds according to claim 2, wherein, The cooling member includes a cooling pipe (28) fixed to the top of the second bracket (3). The cooling pipe (28) is arranged in an arc shape. There are two cooling pipes (28) arranged concentrically. Mounting pipes (29) symmetrically arranged are fixed between the two cooling pipes (28). A water inlet pipe (30) and a water outlet pipe (31) are respectively fixed to the bottoms of the two mounting pipes (29). It also includes load-bearing rods (32) fixed to the bottom of the support frame (8) and fixed to the bottom of the lower mold (9). Metal blocks (33) are fixed inside the two load-bearing rods (32). A through groove (34) is provided inside the metal block (33). The aperture of the through groove (34) is matched with the pipe diameter of the cooling pipe (28). A metal plate (35) is fixed to the end of the metal block (33) away from the load-bearing rod (32). The metal plate (35) is embedded inside the lower mold (9). The part of the load-bearing rod (32) close to the metal block (33) is provided with a heat-insulating cotton board. The load-bearing rod (32) and the metal block (33) are fixedly bonded.

7. The plastic product manufacturing device based on multiple molds according to claim 1, wherein The material taking member includes a second groove (36) opened on the side of the third bracket (4). A second drive shaft (37) is rotatably connected inside the second groove (36). A second servo motor (38) is fixed to one end of the second drive shaft (37). The second servo motor (38) is electrically connected to a second infrared sensor module (39). The second infrared sensor module (39) is fixed to the inner side of the third bracket (4) facing the base (1). A second sleeve (40) is fixed to the outer side of the second drive shaft (37). A second swing arm (41) is fixed to the side of the second sleeve (40). A material suction plate (42) is fixed to the end of the second swing arm (41) away from the second sleeve (40). A suction pump (43) is fixed on the material suction plate (42). A suction cup (44) is provided on the side opposite to the suction pump (43) and fixed to the bottom of the material suction plate (42). A plurality of suction cups (44) are arranged along the circumferential direction of the material suction plate (42). The suction pump (43) is communicated with the material suction plate (42). The suction cup (44) is also in a communicated state with the material suction plate (42). It also includes an aggregate box (45) fixed to one side of the third bracket (4).

8. A manufacturing method of plastic products with multiple molds, using the device of claim 1, characterized in that, Specifically, it includes the following steps: ① According to the injection molding time required, adjust the length of the support frame (8). At the same time, according to the length of the support frame (8) and the power of the drive motor (7), set the interval control time of the timing switch control module to control the timing start and stop of the drive motor (7); ② Turn on the drive motor (7) and the timing switch control module, and set the time for the drive motor (7) to drive the connecting frame (6) by 90° as the control time of the timing switch control module; ③ Connect the telescopic pipe fitting to an external injection molding machine, connect the water inlet pipe (30) and the water outlet pipe (31) to an external cold water circulation system, and at the same time turn on the servo motor and the suction pump (43); ④When one of the lower molds (9) and the upper mold (14) move to the side of the first bracket (2), the first infrared sensor module (22) generates an electrical signal. Based on the existing PLC control system, the first servo motor (21) is controlled to open. The servo motor drives the injection pipe (25) to move above the connecting sleeve (17), and the connecting pipe (26) enters the inside of the connecting sleeve (17). The solenoid valve (27) is opened for injection molding; ⑤After the time node of the timing switch control module arrives, the upper mold (14) and the lower mold (9) during injection molding start to be rotationally driven and move to the cooling pipe (28). The cooling pipe (28) starts to enter the through groove (34) inside the metal block (33). The metal block (33) contacts the cooling pipe (28) to absorb the cold quantity, and further transfers it through the metal plate (35) to cool the molded part inside the mold. At the same time, the next lower mold (9) and the upper mold (14) move to the side of the first bracket (2); ⑥After passing through the cooling pipe (28), the lower mold (9) and the upper mold (14) move to the side of the third bracket (4). The second infrared sensor module (39) generates an electrical signal. Based on the existing PLC control system, the second servo motor (38) is controlled to open, driving the suction plate (42) to move between the upper mold (14) and the lower mold (9). At the same time, during the process of the lower mold (9) and the upper mold (14) moving to the third bracket (4), the cylinder (11) drives the upper mold (14) to move upward and separate from the lower mold (9); ⑦The suction pump (43) is opened, and the molded plastic part is taken out by the suction cup (44). With the drive motor (7) opened again, the second servo motor (38) drives the reset, and the suction pump (43) on the suction plate (42) is closed. The molded plastic part falls into the lower aggregate box (45) for collection; ⑧With the continuous opening and closing of the drive motor (7), the above operations are repeated to complete the integrated manufacturing process of injection molding, cooling, material taking, and material collection.

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