A combined injection mold capable of reducing stress generation

Abstract

The application discloses a combined injection mold capable of reducing stress generation, which comprises support vertical plates, a fixed mold, clamping plates, a constant temperature seat, a vacuum pumping motor, a moving seat, a water circulation motor, a connecting plate and a movable mold, wherein the support vertical plates are arranged in two rows in sequence in one direction, and each of the support vertical plates is connected with a connecting plate on the outward side; each of the support vertical plates is fixed with a clamping plate on the side away from the connecting plate; the two clamping plates are connected with the constant temperature seat; the constant temperature seat is clamped between the two clamping plates and the fixed mold; and the movable mold is arranged above the fixed mold. The mold can be flexibly adjusted according to the specifications of the to-be-formed plastic parts, is convenient to disassemble and assemble, is suitable for different production requirements, and can effectively reduce the internal stress of the formed plastic parts.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a combined injection mold that can reduce the internal stress of plastic parts after injection molding. Background Technology

[0002] Injection molding is a widely used process in plastic processing. The injection mold determines the shape and dimensional accuracy of the plastic part. Improper temperature control during the molding process can directly lead to large internal stress in the molded part, which can cause defects such as warping, deformation, and cracking, seriously affecting product quality. Traditional injection molds are mostly integral structures with insufficient temperature control precision. After molding, there are large temperature differences in different parts of the mold, making it difficult to match the molding temperature requirements of different plastic parts. At the same time, residual air inside the cavity after mold closing cannot be completely expelled, which also increases the internal stress of the molded part. In addition, the existing modular molds are inconvenient to disassemble and adjust, which is not conducive to flexibly adjusting the mold specifications according to production needs. Therefore, it is necessary to improve the structure of existing injection molds to meet the actual production needs of reducing internal stress in plastic parts. Summary of the Invention

[0003] To address the technical deficiencies in the prior art, this invention proposes a combined injection mold that reduces stress generation, solving the aforementioned technical problems and meeting practical needs. The specific technical solution is as follows: A modular injection mold for reducing stress generation includes: a support plate, a fixed mold, a clamping plate, a thermostatic seat, a vacuum motor, a movable seat, a water circulation motor, a connecting plate, and a moving mold. Several support plates are arranged in two rows facing one direction. A connecting plate connects the support plates in each row to each other on their outward-facing sides. A clamping plate is fixed to the side of each support plate away from the connecting plate. The thermostatic seat is connected between two clamping plates, and a fixed mold is clamped between the two clamping plates and the thermostatic seat. A moving mold covers the top of the fixed mold. A base is provided between every two opposing support plates, and the base has a transverse opening. A movable groove is provided, and two sliding rods pass through the movable groove. The two sliding rods reciprocate relative to each other outside the movable groove. Each sliding rod faces one end of a corresponding support plate and is connected to the corresponding support plate. Every two opposing support plates reciprocate in one direction through the corresponding sliding rods. At least two vacuum motors are provided. The two vacuum motors are fixed to a corresponding support plate and are placed opposite each other. A movable seat is connected between the two vacuum motors, and the lower part of the movable seat is attached to the constant temperature seat. A water circulation motor is located on one side between a support plate and the chassis.

[0004] Each of the supporting uprights is embedded with a control unit; each of the supporting uprights has at least two connecting sockets on the side away from the chassis, and every two adjacent supporting uprights are inserted into the corresponding two connecting sockets by the two ends of the connecting plate; each connecting socket is electrically connected to the control unit by an electrical conduit; one of the connecting sockets is connected to an electrical conduit, which is linearly electrically connected to an external control device.

[0005] Each of the supporting plates is fixedly connected to a clamping plate by a screw; each clamping plate has a guide rail at both its front and rear ends, and the guide rail is connected to the vacuum motor, which reciprocates along the swing direction of the guide rail; each clamping plate has several embedded blocks at its upper edge.

[0006] The thermostatic base is composed of several splicing plates, and each pair of splicing plates is fixed with screws. Each splicing plate has a groove at its bottom, and a water pipe is embedded in the groove of each splicing plate. The several water pipes are connected by bends, and two of the water pipes are connected to the water circulation motor at their ends. There are two water circulation motors, one of which is a water pumping motor and the other is a water injection motor. A guide pipe is connected between the two water circulation motors, and the connection between the two water circulation motors is bent and placed outside the several base plates.

[0007] Each vacuum motor has a tube facing the fixed mold; the fixed mold has two holes facing each vacuum motor, each hole corresponding to a tube; a sealing ring is embedded in each of the two holes of the fixed mold; each vacuum motor inserts its tube into the corresponding hole and fills it with the sealing ring.

[0008] The movable seat is composed of an infrared sensing component and a moving motor. The infrared sensing component of the movable seat faces the side of the fixed mold, and a sensing groove is formed in this area of ​​the fixed mold. The moving motor of the movable seat is located at the lower opening, and a guide wheel is provided on the moving motor of the movable seat outward from the opening. The guide wheel of the moving motor of the movable seat is attached to the outer surface of several assembled constant temperature seats, and the movable seat is connected to the vacuum motors on both sides. Through the cooperation of the lower moving motor and the guide wheel, it reciprocates towards one side of the fixed mold on the surface of several assembled constant temperature seats.

[0009] The connecting plate has electrical contact pieces at both ends, and the connecting plate contains several electrical conduits. The metal contact pieces at both ends of the connecting plate are connected by several electrical conduits.

[0010] The moving mold's lower surface fits into the fixed mold; connecting plates are clamped on both sides of the moving mold, and each connecting plate has an embedding slot with the same number of embedding blocks as the number of embedding blocks, with several embedding blocks fitting into several embedding slots; the moving mold facing the movable seat and attached to the surface of the fixed mold has an insertion plate, which is attached to the fixed mold along with the moving mold and inserted into the sensing slot of the fixed mold; the side of the moving mold away from the fixed mold is the back side, and an injection port is provided on the back side of the moving mold, with an inlet channel extending to the front side of the moving mold.

[0011] The moving mold is attached, fixed, and placed onto the upper surface of the fixed mold using an external mobile device.

[0012] The beneficial effects of this invention are as follows: This mold, with its connectable support plates, modular clamping plates, and thermostatic base structure, allows for flexible adjustment of the mold combination according to the specifications of the plastic parts to be molded. It is easy to assemble, disassemble, and debug, adapting to different production needs. A water-circulating motor, in conjunction with water pipes within the thermostatic base, continuously controls the temperature of the fixed mold, ensuring uniform overall mold temperature, reducing temperature differences between different parts, and preventing excessive internal stress in the molded parts due to uneven temperature. Simultaneously, a vacuum motor removes residual air from the cavity after mold closing, eliminating the problem of increased internal stress in the plastic parts caused by residual air. Combined with the reciprocating movement of the moving base, the vacuum process covers the entire cavity area, improving venting efficiency, effectively reducing internal stress in the molded parts, lowering the probability of warping, cracking, and other defects, and improving the quality of the molded parts. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a modular injection mold that can reduce stress generation.

[0014] Figure 2 This is a schematic diagram of a combined three-dimensional structure of a modular injection mold that can reduce stress generation.

[0015] Figure 3 This is a schematic diagram of another three-dimensional structure of the moving mold of a combined injection mold that can reduce stress generation.

[0016] Figure 4 This is a schematic diagram of the combined structure of a support plate, clamping plate, and constant temperature seat for a modular injection mold that can reduce stress generation.

[0017] The components include: 1. Support plate; 2. Fixed mold; 3. Clamping plate; 4. Thermostatic seat; 5. Vacuum motor; 6. Moving seat; 7. Water circulation motor; 8. Splicing plate; 9. Moving mold; 10. Control unit; 11. Chassis; 12. Sliding rod; 13. Moving groove; 14. Connecting socket; 15. Guide rail; 16. Embedded block; 17. Thermostatic seat splicing plate; 18. Water pipe; 19. Bend; 20. Insert pipe; 21. Insertion hole; 22. Sealing ring; 23. Infrared sensing component; 24. Moving motor; 25. Guide wheel; 26. Sensing groove; 27. Electrical contact piece; 28. Electrical conduit; 29. ​​Connecting plate; 30. Embedded groove; 31. Insertion plate; 32. Injection port; 33. Inlet channel. Detailed Implementation

[0018] The embodiments of the present invention will be described below with reference to the accompanying drawings and related examples. The embodiments of the present invention are not limited to the following examples, and the present invention relates to the relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0019] like Figures 1 to 4 As shown, a combined injection mold that can reduce stress generation includes: a support plate 1, a fixed mold 2, a clamping plate 3, a constant temperature seat 4, a vacuum motor 5, a moving seat 6, a water circulation motor 7, a connecting plate 8, and a moving mold 9. Several support plates 1 are arranged in two rows facing one direction. A connecting plate 8 connects the support plates 1 in each row to each other on their outward-facing sides. A clamping plate 3 is fixed to the side of each support plate 1 away from the connecting plate 8. The constant temperature seat 4 connects two clamping plates 3, and a fixed mold 2 is clamped between two clamping plates 3 and the constant temperature seat 4. A moving mold 9 covers the top of the fixed mold 2. A base 11 is provided between every two opposing support plates 1, and the base 11 has a transverse opening. A movable groove 13 is provided, and two sliding rods 12 are inserted through the movable groove 13. The two sliding rods 12 reciprocate relative to each other outside the movable groove 13. Each sliding rod 12 faces one end of the corresponding support plate 1 and is connected to the corresponding support plate 1. Every two opposing support plates 1 reciprocate in one direction through the corresponding sliding rods 12. At least two vacuum motors 5 are provided. The two vacuum motors 5 are fixed to a corresponding support plate 1 and are placed opposite each other. A movable seat 6 is connected between the two vacuum motors 5. The movable seat 6 is attached to the constant temperature seat 4 below. The water circulation motor 7 is located on one side between a support plate 1 and the chassis 11.

[0020] This mold, with its connectable support plate 1, modular clamping plate 3, and thermostatic seat 4, allows for flexible adjustment of the mold combination according to the specifications of the plastic part to be molded. It is easy to assemble, disassemble, and debug, adapting to different production needs. The water circulation motor 7, in conjunction with the water pipes 42 within the thermostatic seat 4, continuously controls the temperature of the fixed mold 2, ensuring uniform overall mold temperature, reducing temperature differences between different parts of the mold, and preventing excessive internal stress in the molded part due to uneven temperature. Simultaneously, the vacuum motor 5 removes residual air from the cavity after mold closing, eliminating the problem of increased internal stress in the plastic part caused by residual air. Combined with the reciprocating movement of the moving seat 6, the vacuum process covers the entire cavity area, improving venting efficiency, effectively reducing internal stress in the molded part, lowering the probability of warping, cracking, and other defects, and improving the quality of the molded part.

[0021] After adopting the above structure, it is necessary to further explain: Before use, the number of support plates 1 can be adjusted according to the actual specifications of the fixed mold 2 and the moving mold 9. The spacing between the two rows of support plates 1 can be adjusted by sliding rod 12. Then, the connecting plate 8 can be inserted into the connecting socket 14 of the corresponding support plate 1 to complete the assembly. The overall specifications of the mold can be adjusted. The debugging process is simple and flexible.

[0022] After the mold is closed, the water circulation motor 7 starts, continuously circulating the constant temperature medium into the water pipe 42 of the constant temperature seat 4 to maintain the overall constant temperature of the fixed mold 2 and keep the temperature of each area of ​​the mold uniform. Then, the vacuum motor 5 starts, and together with the moving seat 6, it drives the vacuum end to move back and forth on the surface of the mold to completely remove the air remaining in the cavity after the fixed mold 2 and the moving mold 9 are closed. Then, molten plastic can be injected through the injection port 91 for injection molding. The stable and uniform temperature control and sufficient venting treatment throughout the process can significantly reduce the internal stress inside the molded plastic part and improve the product yield.

[0023] Each of the supporting plates 1 is embedded with a control unit 10; each of the supporting plates 1 has at least two connecting sockets 14 on the side away from the chassis 11, and each pair of adjacent supporting plates 1 are inserted into the corresponding two connecting sockets 14 by the two ends of the connecting plate 8; each connecting socket 14 is electrically connected to the control unit 10 by an electrical conduit; one of the connecting sockets 14 is connected to an electrical conduit, which is linearly electrically connected to an external control device.

[0024] After adopting the above structure, it is necessary to further explain: Adjacent support plates 1 can be quickly spliced ​​together via connecting plates 8. At the same time, the circuit is connected to the electrical conduit via connecting sockets 14, eliminating the need for additional wiring. When adjusting the number of support plates 1, the circuit can be expanded or reduced simply by plugging and unplugging the connecting plates 8. The wiring operation is convenient. With the sliding rod 12, the spacing between support plates 1 can be adjusted to accommodate the installation and fixing requirements of fixed molds 2 and moving molds 9 of different sizes. Modular assembly greatly improves the flexibility of molds to meet production needs.

[0025] The control unit 10 used in this invention is composed of several circuit boards and is connected to external control devices, such as computers.

[0026] Each of the supporting upright plates 1 and the clamping plates 3 are fixedly connected by a screw; each of the clamping plates 3 has a guide rail 32 at both ends, and the guide rail 32 is connected to the vacuum motor 5. The vacuum motor 5 moves back and forth along the swing direction of the guide rail 32; a number of embedded blocks 31 are provided at the upper edge of each clamping plate 3.

[0027] After adopting the above structure, it is necessary to further explain: The clamping plate 3 is fixedly connected to the support plate 1 by screws, which is convenient for disassembly and maintenance. The guide rail 32 provides a stable moving guide for the vacuum motor 5, ensuring smooth movement during the vacuuming operation without deviation or jamming. The upper embedded block 31 can quickly align and fit with the embedded groove 901 on the side of the moving mold 9, which can quickly complete the positioning and placement of the moving mold 9 when the mold is closed, improve the positioning accuracy of the mold and reduce molding defects caused by mold misalignment.

[0028] The constant temperature seat 4 is composed of several splicing plates 41, and each pair of splicing plates 41 is fixed with screws. Each splicing plate 41 has a groove at its bottom, and a water pipe 42 is embedded in the groove of each splicing plate 41. The several water pipes 42 are connected by bends, and two of the several water pipes 42 are connected to the water circulation motor 7 at their ends. There are two water circulation motors 7, one of which is a water pumping motor and the other is a water injection motor. A guide pipe is connected between the two water circulation motors 7, and the connection between the two water circulation motors 7 is bent and placed outside the several chassis 11.

[0029] After adopting the above structure, it is necessary to further explain: The thermostatic base 4 also adopts a modular splicing structure. The number of splicing plates 41 can be adjusted according to the size of the fixed mold 2. Only by adding or removing splicing plates 41 can different temperature control requirements be met without replacing the entire thermostatic base 4, thus reducing the modification cost. The water pipe 42 embedded in the groove of the splicing plate 41 can be closely attached to the back of the fixed mold 2 to improve heat exchange efficiency. The dual water circulation motor 7 forms a closed-loop thermostatic circulation to ensure the stable flow of the thermostatic medium in the water pipe 42. This allows the thermostatic base 4 to continuously output a uniform and stable temperature to the fixed mold 2, avoiding uneven internal stress of the plastic part caused by excessive local temperature difference.

[0030] Each vacuum motor 5 is provided with a tube facing the side of the fixed mold 2; the fixed mold 2 is provided with two insertion holes facing the side of each vacuum motor 5, and the two insertion holes correspond to the two insertion tubes respectively; a sealing ring 21 is embedded in each of the two insertion holes of the fixed mold 2, and each vacuum motor 5 is inserted into the corresponding insertion hole by means of the insertion tube and filled by the sealing ring 21.

[0031] After adopting the above structure, it is necessary to further explain: After the insert tube is inserted into the insertion hole, the sealing ring 21 can fill the gap between the insert tube and the inner wall of the insertion hole, ensuring the sealing during the vacuuming process and preventing outside air from continuously entering the cavity and affecting the vacuuming effect. The elastic design of the sealing ring 21 can also buffer the impact force when the insert tube is inserted, extending the service life of the insert tube and the fixed mold 2.

[0032] The movable seat 6 is composed of an infrared sensing component and a moving motor. The infrared sensing component of the movable seat 6 is directed towards one side of the fixed mold 2, and a sensing groove is formed in this area of ​​the fixed mold 2. The moving motor of the movable seat 6 is located at the lower opening, and a guide wheel is provided on the moving motor of the movable seat 6 outward from the opening. The guide wheel of the moving motor of the movable seat 6 is attached to the outer surface of the assembled constant temperature seat 4. The movable seat 6 is connected to the vacuum motors 5 on both sides. Through the cooperation of the lower moving motor and the guide wheel, it moves back and forth on the surface of the assembled constant temperature seat 4 towards one side of the fixed mold 2.

[0033] After adopting the above structure, it is necessary to further explain: After the moving mold 9 is closed, the infrared sensing component can trigger the sensing signal through the insertion plate 93 inserted into the sensing slot, automatically starting the moving seat 6 to drive the vacuum motor 5 to move, without the need for additional manual operation, thus improving the degree of automation; the guide wheel moves in contact with the outer surface of the constant temperature seat 4, which can ensure that the moving seat 6 moves smoothly and stably, avoiding bumps and jams that could cause interruption of the vacuuming operation, allowing the vacuuming operation to evenly cover all areas of the cavity, ensuring that residual air is completely extracted, and fully exerting the function of exhaust and reducing internal stress.

[0034] Electrical contact pieces are provided at both ends of the connecting plate 8, and several electrical conduits are provided inside the connecting plate 8. The metal contact pieces at both ends of the connecting plate 8 are connected by several electrical conduits.

[0035] After adopting the above structure, it is necessary to further explain: Once the electrical contact piece of the connecting plate 8 is inserted into the connecting socket, the circuit can be connected. No additional wiring is required when splicing the support plate 1, allowing the module splicing and circuit connection to be completed simultaneously, further simplifying the operation steps of mold assembly and debugging and improving adjustment efficiency.

[0036] The lower surface of the moving mold 9 is fitted with the fixed mold 2; the two sides of the moving mold 9 respectively hold connecting plates 90, each connecting plate 90 having an embedding slot 901 in the same number as the embedding blocks 31, and several embedding blocks 31 and several embedding slots 901 fit together; the moving mold 9 faces the moving seat 6 and is attached to the surface of the fixed mold 2, and has an insertion plate 93, which is attached to the fixed mold 2 along with the moving mold 9 and inserted into the sensing slot of the fixed mold 2; the side of the moving mold 9 away from the fixed mold 2 is the back side, and the back side of the moving mold 9 has an injection port 91, which has an inlet channel that extends to the front side of the moving mold 9.

[0037] After adopting the above structure, it is necessary to further explain: When the moving mold 9 closes, the insert groove 901 can quickly align and engage with the insert block 31 on the clamping plate 3, which can improve the positioning accuracy of mold closing, avoid mold misalignment, and disperse the force during mold closing, thereby improving the structural stability after mold closing. After the insert plate 93 is inserted into the sensing groove along with the moving mold 9, it can directly trigger the infrared sensing component to automatically start the vacuuming operation, realizing the automated connection between the mold closing and triggering processes without additional manual triggering, further improving the automation level of the entire injection molding production process. The injection port 91 and the inlet channel can stably introduce molten plastic, ensuring a smooth injection process.

[0038] The moving mold 9 is attached, fixed, and placed onto the upper surface of the fixed mold 2 using an external mobile device.

[0039] After adopting the above structure, it is necessary to further explain: External mobile devices can automatically complete mold opening and closing operations according to production needs, adapting to the modular structure and automated triggering mechanism of this mold, further improving overall production efficiency and reducing manual operation costs.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A modular injection mold for reducing stress generation, comprising: The support plate comprises a fixed mold, a clamping plate, a constant temperature seat, a vacuum motor, a movable seat, a water circulation motor, a connecting plate, and a moving mold. The support plate consists of several pieces arranged in two rows facing one direction. A connecting plate connects the support plates in each row to each other on their outward-facing sides. A clamping plate is fixed to the side of each support plate away from the connecting plate. The constant temperature seat is connected between two clamping plates. A fixed mold is clamped between the two clamping plates and the constant temperature seat. A moving mold covers the top of the fixed mold. A base is provided between each pair of opposing support plates. A moving groove is opened horizontally in the base. Two sliding rods are inserted in the moving groove. The two sliding rods move back and forth relative to each other out of the moving groove. Each sliding rod faces one end of the corresponding support plate and is connected to the corresponding support plate. Each pair of opposing support plates moves back and forth in one direction through the corresponding sliding rods. At least two vacuum motors are provided. The two vacuum motors are respectively fixed to a corresponding support plate and are placed opposite each other. A movable base is connected between the two vacuum motors and the lower part of the movable base is attached to the constant temperature base. The water circulation motor is located on one side between a support plate and the chassis.

2. The combined injection mold for reducing stress generation according to claim 1, characterized in that: Each of the aforementioned support plates is embedded with a control unit; Each of the support plates has at least two connecting sockets on the side away from the chassis. Two adjacent support plates are inserted into the corresponding two connecting sockets by inserting both ends of the connecting plate. Each of the aforementioned connectors is electrically connected to the control unit via an electrical conduit. One of the aforementioned connectors is connected to an electrical conduit that is linearly electrically connected to an external control device.

3. The combined injection mold for reducing stress generation according to claim 1, characterized in that: Each of the supporting uprights and the clamping plate are fixedly connected by a screw; Each of the clamping plates has a guide rail at both its front and rear ends. The guide rail is connected to the vacuum motor, and the vacuum motor moves back and forth along the swing direction of the guide rail. Each of the clamping plates has several embedded blocks at its upper edge.

4. The combined injection mold for reducing stress generation according to claim 1, characterized in that: The thermostatic base is composed of several splicing plates, and each pair of splicing plates is fixed together with screws; Each of the splicing panels has a groove at its bottom, and a water pipe is embedded in the groove of each splicing panel; The water pipes are connected by bends, and two of the water pipes are connected at their ends to the water circulation motor. Two water circulation motors are provided, one of which is a pumping motor and the other is a water injection motor. A guide pipe is connected between the two water circulation motors, and the connection between the two water circulation motors is bent and placed outside several of the chassis.

5. A combined injection mold for reducing stress generation according to claim 1, characterized in that: Each of the vacuum motors has a tube on the side facing the fixed mold; The fixed mold faces one side of each of the vacuum motors and has two insertion holes, each corresponding to one of the two insertion tubes. A sealing ring is embedded in each of the two insertion holes of the fixed mold. Each vacuum motor is inserted into the corresponding insertion hole by means of a tube and then filled by the sealing ring.

6. A combined injection mold for reducing stress generation according to claim 1, characterized in that: The movable base is composed of an infrared sensing component and a moving motor; The infrared sensing component of the movable base is directed toward one side of the fixed mold, and a sensing groove is formed in this area of ​​the fixed mold. The moving motor of the moving seat is located at the lower opening, and the moving motor of the moving seat is provided with guide wheels that extend outward from the opening. The guide wheels of the moving motor of the moving seat are attached to the outer surface of the combined constant temperature seat. The moving seat is connected to the vacuum motors on both sides. Through the cooperation of the lower moving motor and the guide wheels, the moving seat moves back and forth on the surface of the combined constant temperature seat towards one side of the fixed mold.

7. A combined injection mold for reducing stress generation according to claim 1, characterized in that: The connecting plate has electrical contact pieces at both ends, and the connecting plate contains several electrical conduits. The metal contact pieces at both ends of the connecting plate are connected by several electrical conduits.

8. A combined injection mold for reducing stress generation according to claim 1, characterized in that: The lower surface of the moving mold fits into the fixed mold; The moving mold has connecting plates clamped on both sides, and each connecting plate has an embedding slot with the same number of embedding blocks. Several embedding blocks and several embedding slots fit together. The moving mold faces one side of the movable seat and is attached to the surface of the fixed mold. An insertion plate is provided. The insertion plate is attached to the fixed mold along with the moving mold and is inserted into the sensing groove of the fixed mold. The side of the moving mold away from the fixed mold is the back side. An injection port is provided on the back side of the moving mold, and an inlet channel is provided in the injection port. The inlet channel of the injection port extends to the front side of the moving mold.

9. A combined injection mold for reducing stress generation according to claim 1, characterized in that: The moving mold is attached, fixed, and placed onto the upper surface of the fixed mold using an external mobile device.

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