An injection mold for foam production

Abstract

This utility model discloses an injection mold for foam production, belonging to the field of injection mold technology. It includes a base, with a first support plate and a second support plate symmetrically distributed at the top of the base. A first cylinder is fixedly installed on the side of the first support plate away from the second support plate. The piston shaft of the first cylinder slides through the first support plate, and a mounting box is fixedly installed at the end of the piston shaft. A first mold is fixedly installed on the side of the mounting box away from the first support plate. This utility model, through the setting of the ejection assembly, uses a second reduction motor to drive a screw to rotate. The screw drives the mounting plate to move within the mounting box, the mounting plate pushes a support rod to move, and the support rod pushes the ejection plate to move within the mold cavity, thus ejecting the product. By ejecting the product through the ejection plate, it not only achieves demolding but may also reduce the damage caused during product removal.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to an injection mold for foam production. Background Technology

[0002] Foamed plastics are a type of polymer material formed by dispersing a large number of gas micropores in solid plastic. They have properties such as light weight, heat insulation, sound absorption, and shock absorption. Foam molding is divided into two types: foaming molding and casting molding. The raw materials for foamed polypropylene are mainly polypropylene granules and additives such as foaming agents and foam stabilizers. Among them, polypropylene granules are the main component of foamed polypropylene. The foaming agent causes the polypropylene granules to undergo a chemical reaction during heat treatment, producing gas and "expanding" into foam material. The expanded polystyrene granules need to be pressed into shape using a mold. By placing the expanded polystyrene granules into the mold and applying pressure, polystyrene foam products of various shapes can be obtained. After the foam products are pressed into shape by injection molding, they are ejected through an ejector structure for easy subsequent material removal.

[0003] Some existing injection molds for foam production use rod-shaped ejection structures. After the product is processed, the ejection rod pushes the product out of the mold cavity to achieve demolding. However, when the ejection rod pushes the product, it may insert into the product due to large pushing force, causing damage and reducing the processing quality of the equipment. Therefore, we propose an injection mold for foam production. Utility Model Content

[0004] To solve the above problems, this utility model provides an injection mold for foam production, adopting the following technical solution:

[0005] An injection mold for foam production, comprising:

[0006] The base has a first support plate and a second support plate that are symmetrically distributed and fixedly installed on its top.

[0007] The first cylinder is fixedly installed on the side of the first support plate away from the second support plate;

[0008] The piston shaft of the first cylinder slides through the first support plate, and an installation box is fixedly installed at the end of the piston shaft of the first cylinder.

[0009] The first mold is fixedly installed on the side of the mounting box away from the first support plate, and the second mold is fixedly installed on the side of the second support plate close to the first support plate. The first mold has a cavity on the side close to the second support plate, and an ejection component is provided in the cavity.

[0010] The second support plate has an extrusion tube on the side away from the first support plate. The end of the extrusion tube near the first support plate passes through the second support plate. A feed hole is opened in the second mold. Two symmetrically distributed support blocks are fixedly installed between the extrusion tube and the base. A feed tube is provided on the side wall of the extrusion tube. An extrusion assembly is provided inside the extrusion tube.

[0011] By adopting the above technical solution, when the equipment is in use, the material enters the extrusion tube through the feed pipe, and then the first cylinder drives the mounting box and the first mold to move towards the second mold, so that the first mold and the second mold fit together. Then, the extrusion component injects the material into the mold cavity through the feed hole, which can play the role of processing products. After the product is processed, the first cylinder drives the mounting box and the first mold away from the second mold in the opposite direction, and then the ejection component ejects the product out of the mold cavity, which can play the role of demolding and facilitate subsequent material removal.

[0012] Furthermore, the ejection assembly includes an ejection plate slidably installed in the mold cavity, a screw rotatably installed in the mounting box, a mounting plate sleeved on the side wall of the screw, two symmetrically distributed support rods fixedly installed on the side of the mounting plate near the ejection plate, the ends of the two support rods away from the mounting plate sliding into the mold cavity, and the ends of the support rods penetrating into the mold cavity being fixedly connected to the side opposite to the ejection plate, a worm gear fixedly sleeved on the side wall of the end of the screw away from the ejection plate, a worm shaft rotatably installed in the mounting box, the worm shaft and the worm gear meshing, a second reduction motor fixedly installed in the mounting box, a main gear fixedly sleeved on the side wall of the output shaft of the second reduction motor, a secondary gear fixedly sleeved on the side wall of the lower section of the worm shaft, the secondary gear and the main gear meshing, and two symmetrically distributed limiting rods fixedly installed in the mounting box, the ends of the two limiting rods near the ejection plate sliding through the mounting plate.

[0013] By adopting the above technical solution, after the product is processed, the second geared motor drives the main gear to rotate, the main gear drives the secondary gear to rotate, the secondary gear drives the worm gear to rotate, the worm gear drives the worm wheel to rotate, the worm wheel drives the screw to rotate, the screw drives the mounting plate to push the support rod to move towards the second mold, and the support rod pushes the ejector plate to move towards the second mold, which can play the role of ejecting the product out of the mold cavity, thus playing the role of demolding. By replacing the rod in the existing technology with the ejector plate, it is beneficial to improve the stability of product ejection and reduce the damage to the product. When the screw drives the mounting plate to move in the mounting box, the mounting plate slides on the two limit rods. The setting of the two limit rods helps to maintain the stability of the movement of the mounting plate.

[0014] Furthermore, two symmetrically distributed stabilizing rods are fixedly installed between the first support plate and the second support plate. Stabilizing blocks are slidably sleeved on the side walls of the two stabilizing rods, and the bottom ends of the two stabilizing blocks are fixedly connected to the top of the first mold.

[0015] By adopting the above technical solution, when the first cylinder drives the first mold to move, the first mold, carrying the stabilizing block, slides on the stabilizing rod on the same side. Through the cooperation of the stabilizing block and the stabilizing rod, the first mold is supported and stabilized, which helps to maintain the stability of the first mold's movement.

[0016] Furthermore, the extrusion assembly includes a second cylinder fixedly mounted on the top of the base. A protective box is fixedly mounted on the end of the piston shaft of the second cylinder. A first geared motor is fixedly mounted inside the protective box. An extrusion rod is rotatably mounted on the side of the protective box away from the second cylinder. The end of the extrusion rod near the second cylinder passes through the protective box and is fixedly connected to the end of the output shaft of the first geared motor. The end of the extrusion rod away from the second cylinder slides through into the extrusion tube. An extrusion head is fixedly mounted on the end of the extrusion rod away from the second cylinder. A spiral blade is provided on a section of the side wall of the section of the extrusion rod that passes through the extrusion tube. A heating layer is provided on the outside of the extrusion tube.

[0017] By adopting the above technical solution, the first geared motor drives the extrusion rod to rotate, the extrusion rod drives the spiral blade to rotate and the extrusion head to rotate, and then the second cylinder drives the protective box, extrusion rod, spiral blade and extrusion head to move. Through the cooperation of the spiral blade and extrusion head, the material can be transported between the first mold and the second mold to achieve the effect of injection molding. The outside of the extrusion tube is provided with a heating layer, which can heat and melt the material.

[0018] Furthermore, the second mold has two symmetrically distributed mounting slots on the side closer to the first mold, and two symmetrically distributed push plates on the side of the second mold away from the second support plate. Telescopic rods are fixedly installed on the inner walls of the two mounting slots on the side closer to the second support plate, and the ends of the two telescopic rods are fixedly connected to the opposite side of the push plates on the same side. The second mold has a storage slot that matches the push plates on the side closer to the second support plate, and the storage slot is connected to the mounting slot on the same side.

[0019] By adopting the above technical solution, after the product is processed, the first cylinder drives the mounting box and the first mold away from the second mold in the reverse direction. Then, the telescopic rod drives the push plate on the same side to move towards the first mold. Pushing the product away from the second mold by the push plate helps to prevent the product from being stuck on the side wall of the second mold, facilitating subsequent demolding.

[0020] Furthermore, limit blocks are fixedly installed on both sides of the two push plates, and limit grooves matching the limit blocks on the same side are opened on the inner walls of the two storage slots.

[0021] By adopting the above technical solution, the push plate is fixed by the setting of limiting blocks on both sides. The limiting blocks and the limiting grooves opened in the inner wall of the storage groove are engaged to stabilize the push plate. This helps to keep the push plate flush with the second mold and facilitates the subsequent bonding of the first mold and the second mold.

[0022] Furthermore, a groove is provided at the top of the base, which is located between the first support plate and the second support plate. A frame is provided inside the groove, and a conveyor belt is provided inside the frame.

[0023] By adopting the above technical solution, the demolded product falls onto the conveyor belt and is transported away by the conveyor belt, which facilitates subsequent material retrieval by the staff and helps maintain the processing efficiency of the equipment.

[0024] In summary, this utility model has the following beneficial technical effects:

[0025] (1) In this utility model, by setting the ejection component, the screw is driven to rotate by the second reduction motor, the screw drives the mounting plate to move in the mounting box, the mounting plate pushes the plate support rod to move, and the support rod pushes the ejection plate to move in the mold cavity, which can play the role of ejecting the product. By ejecting the product through the ejection plate, not only can the demolding function be played, but the damage caused when the product is removed may also be reduced.

[0026] (2) In this utility model, the second mold is equipped with a telescopic rod and a push plate. The telescopic rod drives the push plate to move towards the first mold, and the push plate pushes the product in the first mold. This helps to prevent the product from being placed on the second mold and improves the demolding effect of the equipment.

[0027] (3) In this utility model, a stabilizing block is provided on the top of the first mold. The stabilizing block is sleeved on the side wall of the stabilizing rod. Through the cooperation of the stabilizing rod and the stabilizing block, the first mold is supported and stabilized, which helps to maintain the stability of the movement of the first mold. Attached Figure Description

[0028] Figure 1 This is a first-view structural schematic diagram of the injection mold for foam production according to this utility model.

[0029] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0030] Figure 3 This is a structural schematic diagram of the injection mold for foam production according to the present invention from a second perspective.

[0031] Figure 4 This is a cross-sectional view of the injection mold for foam production according to this utility model;

[0032] Figure 5 for Figure 4 Enlarged view of B in the middle;

[0033] Figure 6 for Figure 4 Enlarged view of C;

[0034] Figure 7This is an exploded view of the ejector component in the injection mold for foam production according to this utility model.

[0035] Explanation of the labels in the diagram:

[0036] 1. Base; 2. First cylinder; 3. First support plate; 4. Mounting box; 5. Stabilizing rod; 6. Stabilizing block; 7. First mold; 8. Second mold; 9. Heating layer; 10. Extrusion tube; 11. Support block; 12. Protective box; 13. Second cylinder; 14. Extrusion rod; 15. Conveyor belt; 16. Frame; 17. Push plate; 18. Telescopic rod; 19. Mold cavity; 20. Ejector plate; 21. First geared motor; 22. Spiral blade; 23. Extrusion head; 24. Groove; 25. Second geared motor; 26. Main gear; 27. Secondary gear; 28. Worm gear; 29. ​​Turbine; 30. Screw; 31. Limiting rod; 32. Mounting plate; 33. Support rod; 34. Mounting groove; 35. Second support plate. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The following is in conjunction with the appendix Figure 1-7 The present invention will be described in further detail below.

[0041] Please see Figure 1-7 An injection mold for foam production includes a base 1. A first support plate 3 and a second support plate 35, symmetrically distributed, are fixedly installed on the top of the base 1. A first cylinder 2 is fixedly installed on the side of the first support plate 3 away from the second support plate 35. The piston shaft of the first cylinder 2 slides through the first support plate 3. An installation box 4 is fixedly installed at the end of the piston shaft of the first cylinder 2. A first mold 7 is fixedly installed on the side of the installation box 4 away from the first support plate 3. A second mold 8 is fixedly installed on the side of the second support plate 35 close to the first support plate 3. A mold cavity 19 is opened on the side of the first mold 7 close to the second support plate 35. An extrusion tube 10 is provided on the side of the second support plate 35 away from the first support plate 3. The end of the extrusion tube 10 close to the first support plate 35 passes through the second support plate 35. A feed hole is opened in the second mold 8. Two symmetrically distributed support blocks 11 are fixedly installed between the extrusion tube 10 and the base 1. A feed pipe is provided on the side wall of the extrusion tube 10. An extrusion assembly is provided inside the extrusion tube 10.

[0042] The extrusion assembly includes a second cylinder 13 fixedly mounted on the top of the base 1. A protective box 12 is fixedly mounted on the piston shaft end of the second cylinder 13. A first geared motor 21 is fixedly mounted inside the protective box 12. An extrusion rod 14 is rotatably mounted on the side of the protective box 12 away from the second cylinder 13. The end of the extrusion rod 14 near the second cylinder 13 passes through the protective box 12 and is fixedly connected to the output shaft end of the first geared motor 21. The end of the extrusion rod 14 away from the second cylinder 13 slides through the extrusion tube 10. An extrusion head 23 is fixedly mounted on the end of the extrusion rod 14 away from the second cylinder 13. A spiral blade 22 is provided on a section of the side wall of the extrusion rod 14 passing through the extrusion tube 10. A heating layer 9 is provided on the outside of the extrusion tube 10.

[0043] When the equipment is in use, the material enters the extrusion tube 10 through the feed pipe. Then, the first cylinder 2 drives the mounting box 4 and the first mold 7 to move towards the second mold 8, so that the first mold 7 and the second mold 8 fit together. Then, the first reduction motor 21 drives the extrusion rod 14 to rotate, and the extrusion rod 14 drives the spiral blade 22 and the extrusion head 23 to rotate. Then, the second cylinder 13 drives the protective box 12, the extrusion rod 14, the spiral blade 22 and the extrusion head 23 to move. Through the cooperation of the spiral blade 22 and the extrusion head 23, the material can be transported between the first mold 7 and the second mold 8 to achieve the effect of injection molding. The outer side of the extrusion tube 10 is provided with a heating layer 9, which can heat and melt the material.

[0044] The mold cavity 19 is equipped with an ejector assembly, which includes an ejector plate 20 slidably installed in the mold cavity 19. A screw 30 is rotatably installed in the mounting box 4. A mounting plate 32 is sleeved on the side wall of the screw 30. Two symmetrically distributed support rods 33 are fixedly installed on the side of the mounting plate 32 near the ejector plate 20. The ends of the two support rods 33 away from the mounting plate 32 slide into the mold cavity 19. The ends of the support rods 33 that pass through the mold cavity 19 are fixedly connected to the side opposite to the ejector plate 20. The end of the screw 30 away from the ejector plate 20 is fixedly connected to the side of the ejector plate 20. A turbine 29 is fixedly sleeved on the wall. A worm gear 28 is rotatably installed inside the mounting box 4. The worm gear 28 and the turbine 29 mesh. A second reduction motor 25 is fixedly installed inside the mounting box 4. A main gear 26 is fixedly sleeved on the side wall of the output shaft of the second reduction motor 25. A secondary gear 27 is fixedly sleeved on the side wall of the lower section of the worm gear 28. The secondary gear 27 and the main gear 26 mesh. Two symmetrically distributed limiting rods 31 are fixedly installed inside the mounting box 4. The ends of the two limiting rods 31 near the top plate 20 slide through the mounting plate 32.

[0045] After the product processing is completed, the second reduction motor 25 drives the main gear 26 to rotate, the main gear 26 drives the secondary gear 27 to rotate, the secondary gear 27 drives the worm gear 28 to rotate, the worm gear 28 drives the turbine 29 to rotate, the turbine 29 drives the screw 30 to rotate, the screw 30 drives the mounting plate 32 to push the support rod 33 to move towards the second mold 8, and the support rod 33 pushes the ejector plate 20 to move towards the second mold 8, which can play the role of ejecting the product out of the mold cavity 19, thus playing the role of demolding. The ejector plate 20 replaces the rod in the prior art, which is conducive to improving the stability of product ejection and reducing the damage to the product. When the screw 30 drives the mounting plate 32 to move within the mounting box 4, the mounting plate 32 slides on the two limit rods 31. The setting of the two limit rods 31 helps to maintain the stability of the movement of the mounting plate 32.

[0046] Two symmetrically distributed stabilizing rods 5 are fixedly installed between the first support plate 3 and the second support plate 35. Stabilizing blocks 6 are slidably sleeved on the side walls of both stabilizing rods 5. The bottom ends of both stabilizing blocks 6 are fixedly connected to the top of the first mold 7. When the first cylinder 2 drives the first mold 7 to move, the first mold 7 slides on the stabilizing rods 5 on the same side with the stabilizing blocks 6. Through the cooperation of the stabilizing blocks 6 and the stabilizing rods 5, the first mold 7 is supported and stabilized, which helps to maintain the stability of the movement of the first mold 7.

[0047] The second mold 8 has two symmetrically distributed mounting slots 34 on the side closest to the first mold 7. The second mold 8 also has two symmetrically distributed push plates 17 on the side furthest from the second support plate 35. Telescopic rods 18 are fixedly installed on the inner walls of the mounting slots 34 near the second support plate 35, with the ends of the two telescopic rods 18 fixedly connected to the opposite side of the push plate 17. The second mold 8 has a receiving slot on the side closest to the second support plate 35 that matches the push plate 17, and this receiving slot communicates with the mounting slots 34 on the same side. After product processing, the first cylinder 2 drives the mounting box 4 and the first mold 7 away from the second mold 8 in the reverse direction. Then, the telescopic rods 18 drive the push plate 17 on the same side to move towards the first mold 7. Pushing the product away from the second mold 8 via the push plate 17 helps prevent the product from being trapped on the side wall of the second mold 8, facilitating subsequent demolding.

[0048] Limiting blocks are fixedly installed on both sides of the two push plates 17. The inner walls of the two storage slots are provided with limiting grooves that match the limiting blocks on the same side. The limiting blocks on both sides of the push plates 17 engage with the limiting grooves on the inner walls of the storage slots, which helps to stabilize the push plates 17 and keep them flush with the second mold 8, making it easier for the first mold 7 and the second mold 8 to fit together in the future.

[0049] The base 1 has a groove 24 at its top, which is located between the first support plate 3 and the second support plate 35. A frame 16 is provided inside the groove 24, and a conveyor belt 15 is provided inside the frame 16. The demolded product falls onto the conveyor belt 15 and is transported away by the conveyor belt 15, which facilitates the subsequent material retrieval by the staff and helps maintain the processing efficiency of the equipment.

[0050] The implementation principle of this utility model embodiment is as follows: When the equipment is in use, the material enters the extrusion tube 10 through the feed pipe, and then the first cylinder 2 drives the mounting box 4 and the first mold 7 to move towards the second mold 8, so that the first mold 7 and the second mold 8 fit together. Then, the extrusion component injects the material into the mold cavity 19 through the feed hole, which can play the role of processing the product. After the product is processed, the first cylinder 2 drives the mounting box 4 and the first mold 7 away from the second mold 8 in the opposite direction. Then, the ejection component ejects the product out of the mold cavity 19, which can play the role of demolding and facilitate subsequent material removal.

[0051] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An injection mold for foam production, characterized in that: include A base, wherein a first support plate and a second support plate, which are symmetrically distributed, are fixedly installed on the top of the base; A first cylinder is fixedly installed on the side of the first support plate away from the second support plate; The piston shaft of the first cylinder slides through the first support plate, and an installation box is fixedly installed at the end of the piston shaft of the first cylinder. The first mold is fixedly installed on the side of the mounting box away from the first support plate, and the second mold is fixedly installed on the side of the second support plate close to the first support plate. The first mold has a cavity on the side close to the second support plate, and an ejection assembly is provided in the cavity. The second support plate has an extrusion tube on the side away from the first support plate. The end of the extrusion tube near the first support plate passes through the second support plate. A feed hole is opened in the second mold. Two symmetrically distributed support blocks are fixedly installed between the extrusion tube and the base. A feed tube is provided on the side wall of the extrusion tube. An extrusion assembly is provided inside the extrusion tube.

2. The injection mold for foam production according to claim 1, characterized in that: The ejection assembly includes an ejection plate slidably installed in the mold cavity. A screw is rotatably installed in the mounting box. A mounting plate is sleeved on the side wall of the screw. Two symmetrically distributed support rods are fixedly installed on the side of the mounting plate near the ejection plate. The ends of the two support rods away from the mounting plate slide into the mold cavity. The ends of the support rods that penetrate into the mold cavity are fixedly connected to the side opposite to the ejection plate. A worm gear is fixedly sleeved on the side wall of the end of the screw away from the ejection plate. A worm shaft is rotatably installed in the mounting box. The worm shaft and the worm gear mesh. A second reduction motor is fixedly installed in the mounting box. A main gear is fixedly sleeved on the side wall of the output shaft of the second reduction motor. A secondary gear is fixedly sleeved on the side wall of the lower section of the worm shaft. The secondary gear and the main gear mesh. Two symmetrically distributed limiting rods are fixedly installed in the mounting box. The ends of the two limiting rods near the ejection plate slide through the mounting plate.

3. The injection mold for foam production according to claim 1, characterized in that: Two symmetrically distributed stabilizing rods are fixedly installed between the first support plate and the second support plate. Stabilizing blocks are slidably sleeved on the side walls of the two stabilizing rods, and the bottom ends of the two stabilizing blocks are fixedly connected to the top of the first mold.

4. The injection mold for foam production according to claim 1, characterized in that: The extrusion assembly includes a second cylinder fixedly mounted on the top of the base. A protective box is fixedly mounted on the piston shaft end of the second cylinder. A first geared motor is fixedly mounted inside the protective box. An extrusion rod is rotatably mounted on the side of the protective box away from the second cylinder. The end of the extrusion rod near the second cylinder passes through the protective box and is fixedly connected to the output shaft end of the first geared motor. The end of the extrusion rod away from the second cylinder slides through into the extrusion tube. An extrusion head is fixedly mounted on the end of the extrusion rod away from the second cylinder. A spiral blade is provided on a section of the side wall of the extrusion tube through which the extrusion rod passes. A heating layer is provided on the outside of the extrusion tube.

5. The injection mold for foam production according to claim 1, characterized in that: The second mold has two symmetrically distributed mounting slots on the side closer to the first mold. The second mold has two symmetrically distributed push plates on the side away from the second support plate. Telescopic rods are fixedly installed on the inner walls of the two mounting slots on the side closer to the second support plate. The ends of the two telescopic rods are fixedly connected to the opposite side of the push plates on the same side. The second mold has a storage slot that matches the push plates on the side closer to the second support plate. The storage slot is connected to the mounting slots on the same side.

6. The injection mold for foam production according to claim 5, characterized in that: Limiting blocks are fixedly installed on both sides of the two push plates, and limiting grooves that match the limiting blocks on the same side are opened on the inner walls of the two storage slots.

7. The injection mold for foam production according to claim 1, characterized in that: The base has a groove at its top, which is located between the first support plate and the second support plate. A frame is provided inside the groove, and a conveyor belt is provided inside the frame.

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