Injection molding machine for EVA slipper production and processing

Abstract

The utility model discloses an injection molding machine for EVA slipper production and processing, and relates to the technical field of injection molding machines, the injection molding machine comprises a base, the top of the base is fixedly connected with symmetrically distributed fixing plates, and a mold structure is slidably mounted between the top of the base and the two fixing plates; the mold structure comprises a sliding mold, a center mold and a top mold, sliding rods are fixedly connected to the two sides of the center mold and the two sides of the top mold, the end of the center mold is hinged to the end of the sliding mold, the end of the top mold is hinged to the end of the center mold, and two guide grooves of arc-shaped structures are formed in the fixing plate. And the sliding rod is connected into the guide groove in a sliding manner. According to the injection molding machine for producing and processing the EVA slippers, through a hinged linkage structure of the sliding mold, the center mold and the top mold, combined motion control of the arc-shaped guide groove of the fixed plate and the sliding rod is combined, a mold group can be automatically unfolded step by step during mold opening, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically to an injection molding machine for EVA slipper production and processing. Background Technology

[0002] Injection molding machines for EVA slipper production refer to injection molding equipment used to produce slippers made of EVA material. EVA material is widely used in slipper manufacturing due to its lightweight, softness, anti-slip properties, and good shock absorption.

[0003] To overcome the aforementioned deficiencies, Chinese patent (publication number: CN220030985U) discloses an EVA injection molding machine, relating to the technical field of molding machines. The machine includes a support plate with a fixed frame at its upper end. One side of the fixed frame is open, and a fixed mold is located on the inner bottom wall of the fixed frame. A linear slide rail is provided on the support plate, and a movable frame is mounted on the linear slide rail. The movable frame is driven by a driving mechanism to slide along the linear slide rail. One side of the movable frame is open, and a moving mold is located on the inner bottom wall of the movable frame. The movable frame and the fixed frame are joined together to form a molding cavity. An injection mechanism is located on one side of the movable frame. A gas collecting head is located on the upper side wall of the fixed frame, and a fan is located on the lower side wall of the fixed frame. A purifier is located at the upper end of the fixed frame, and the gas collecting head is connected to the purifier. Toxic fumes generated after injection molding are contained within the molding cavity. The fan blows the toxic fumes through the gas collecting head into the purifier for purification before discharge, preventing air pollution in the injection molding area and ensuring the health of the operators.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation: During the operation of an injection molding machine, hot melt material is injected into the mold and cooled to form a product. Existing injection molding machines generally adopt a single mold opening design, and the next cycle can only be carried out after demolding and cooling, resulting in low efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide an injection molding machine for the production and processing of EVA slippers, so as to solve the problem that the existing injection molding machines in the above-mentioned background art generally adopt a single mold opening design, and need to wait for demolding and cooling before the next cycle can be carried out, resulting in low efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an injection molding machine for EVA slipper production and processing, including a base, wherein symmetrically distributed fixing plates are fixedly connected to the top of the base, and a mold structure is slidably installed on the top of the base and between the two fixing plates;

[0007] The mold structure includes a sliding mold, a central mold, and a top mold. Sliding rods are fixedly connected to both sides of the central mold and the top mold. The end of the central mold is hinged to the end of the sliding mold, and the end of the top mold is hinged to the end of the central mold. The fixed plate has two arc-shaped guide grooves inside, and the sliding rods are slidably connected inside the guide grooves.

[0008] Preferably, a first forming cavity is formed between the sliding mold and the central mold, and a second forming cavity is formed between the central mold and the top mold, wherein the first forming cavity and the second forming cavity are interconnected.

[0009] Preferably, the top of the base is fixedly connected to two parallel guide rails, the rear end of the base is provided with a filling port, and the front end of the base is provided with a threaded hole.

[0010] Preferably, the bottom of the sliding mold is provided with two parallel connecting grooves, and the sliding mold slides in cooperation with the guide rail through the connecting grooves.

[0011] Preferably, a U-shaped pull rod is fixedly connected to the front side of the sliding mold, and an installation sleeve is fixedly connected to the end of the pull rod away from the sliding mold. A self-tightening bolt is slidably connected inside the installation sleeve.

[0012] Preferably, the self-tightening bolt passes through the mounting sleeve and is threaded into the threaded hole, and the pull rod is slidably connected to the inside of the front end of the base.

[0013] Preferably, the center mold and the top mold are each provided with an injection port aligned with the injection port at the middle of their rear ends. The center mold and the top mold are provided with heat dissipation pipes inside, and the two ends of the heat dissipation pipes are respectively connected to connectors fixedly set on one side of the center mold and the top mold. The center mold and the sliding mold are provided with venting grooves on their front sides.

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

[0015] This injection molding machine for EVA slipper production and processing uses a hinged linkage structure of sliding mold, center mold and top mold, combined with the composite motion control of the fixed plate arc guide groove and sliding rod. When the mold is opened, the mold assembly can automatically unfold step by step, improving production efficiency.

[0016] The sliding mold moves forward, causing the central mold to rotate to a 45° angle. The top mold rotates further to a vertical position, fully exposing the molded slippers and making it easy to remove them. This eliminates the need for an ejector mechanism and allows for quick cleaning of the molding cavity after demolding. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2This is a schematic diagram of the mold opening structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the base structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the connecting groove structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the top mold structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the central mold structure of this utility model.

[0023] In the diagram: 1. Base; 2. Fixing plate; 3. Sliding mold; 4. Center mold; 5. Top mold; 6. Sliding rod; 7. Guide groove; 8. Guide rail; 9. Injection port; 10. Threaded hole; 11. Connecting groove; 12. Tie rod; 13. Mounting sleeve; 14. Self-tightening bolt; 15. Injection port; 16. Connector; 17. Venting groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1 - Figure 6This utility model provides the following technical solution: an injection molding machine for EVA slipper production and processing, including a base 1, with symmetrically distributed fixing plates 2 fixedly connected to the top of the base 1, and a mold structure slidably installed between the top of the base 1 and the two fixing plates 2; the mold structure includes a sliding mold 3, a central mold 4, and a top mold 5, with sliding rods 6 fixedly connected to both sides of the central mold 4 and the top mold 5, the end of the central mold 4 hinged to the end of the sliding mold 3, and the end of the top mold 5 hinged to the end of the central mold 4, the fixing plates 2 having two arc-shaped guide grooves 7 inside, and the sliding rods 6 slidably connected inside the guide grooves 7; a first molding cavity is formed between the sliding mold 3 and the central mold 4, and a second molding cavity is formed between the central mold 4 and the top mold 5, the first molding cavity and the second molding cavity being interconnected; two parallel guide rails 8 are fixedly connected to the top of the base 1, and the base 1... A filling port 9 is provided in the middle of the rear end, and a threaded hole 10 is provided in the middle of the front end of the base 1. The bottom of the sliding mold 3 is provided with two parallel connecting grooves 11, and the sliding mold 3 slides with the guide rail 8 through the connecting grooves 11. A U-shaped pull rod 12 is fixedly connected to the front side of the sliding mold 3. An installation sleeve 13 is fixedly connected to the end of the pull rod 12 away from the sliding mold 3. A self-tightening bolt 14 is slidably connected inside the installation sleeve 13. The self-tightening bolt 14 passes through the installation sleeve 13 and is threaded into the threaded hole 10. The pull rod 12 is slidably connected to the front end of the base 1. The middle of the rear end of the center mold 4 and the top mold 5 is provided with an injection port 15 aligned with the filling port 9. The center mold 4 and the top mold 5 are provided with heat dissipation pipes, and the two ends of the heat dissipation pipes are respectively connected to a connector 16 fixedly set on one side of the center mold 4 and the top mold 5. The front side of the center mold 4 and the sliding mold 3 is provided with an exhaust groove 17.

[0026] The EVA slipper injection molding device operates based on the linkage structure of the sliding mold 3, the central mold 4, and the top mold 5, in conjunction with the guide groove 7 of the fixed plate 2 and the guide rail 8 of the base 1. Initially, the sliding mold 3, the central mold 4, and the top mold 5 are locked to the threaded hole 10 at the front end of the base 1 by self-tightening bolts 14, tightly fitting against the rear end of the base 1 to form two connected molding cavities: the first molding cavity between the sliding mold 3 and the central mold 4 is used to shape the slipper sole, while the second molding cavity between the central mold 4 and the top mold 5 shapes the upper or bevel. At this time, the injection port 15 at the rear end of the central mold 4 and the top mold 5 is precisely aligned with the injection port 9 of the base 1, providing a channel for injection molding. When the high-temperature molten EVA material is injected into the cavity through the injection port 9, the heat dissipation pipes inside the central mold 4 and the top mold 5 are connected to an external cooling water circulation system through connectors 16, and the exhaust groove 17 discharges gas, ensuring rapid and uniform filling and cooling and solidification of the material.

[0027] After injection molding is completed, the operator rotates the self-tightening bolt 14 counterclockwise to disengage it from the threaded hole 10, and then pulls the pull rod 12 to move the sliding mold 3 forward along the guide rail 8. Since the sliding rods 6 on both sides of the central mold 4 and the top mold 5 are embedded in the arc-shaped guide grooves 7 of the fixed plate 2, the linear motion of the sliding mold 3 is transformed into a composite motion of the mold assembly through the damping cooperation of the sliding rods 6 and the guide grooves 7. Specifically, when the sliding mold 3 moves forward, the central mold 4 rotates upward around its hinge point with the sliding mold 3, and the two unfold to a 45° angle; simultaneously, the top mold 5, driven by the sliding rods 6 sliding along the arc at the end of the guide groove 7, further rotates to a vertical position. This step-by-step mold opening action completely exposes the molded slipper to the outside of the central mold 4, allowing the operator to directly remove the part without the need for a traditional ejection mechanism.

[0028] After demolding, the pull rod 12 is pulled in the opposite direction to drive the sliding mold 3 to reset along the guide rail 8. At this time, the sliding rod 6 slides in the opposite direction along the guide groove 7, forcing the center mold 4 and the top mold 5 to rotate and retract in sequence. When the sliding mold 3 slides back to its initial position through the connecting groove 11 and the guide rail 8, the self-tightening bolt 14 in the mounting sleeve 13 is screwed back into the threaded hole 10, locking the mold assembly through the thread preload. This locking action not only fixes the position of the sliding mold 3, but also generates additional clamping force on the mating surface of the injection port 15 and the injection port 9, preventing molten material leakage during high-pressure injection molding.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An injection molding machine for EVA slipper production and processing, comprising a base (1), wherein the top of the base (1) is fixedly connected to symmetrically distributed fixing plates (2), and a mold structure is slidably installed between the top of the base (1) and the two fixing plates (2); characterized in that The mold structure includes a sliding mold (3), a central mold (4), and a top mold (5). Both sides of the central mold (4) and the top mold (5) are fixedly connected with sliding rods (6). The end of the central mold (4) is hinged to the end of the sliding mold (3), and the end of the top mold (5) is hinged to the end of the central mold (4). The fixed plate (2) has two arc-shaped guide grooves (7) inside, and the sliding rods (6) are slidably connected inside the guide grooves (7).

2. The injection molding machine for processing EVA slippers according to claim 1, characterized in that: A first forming cavity is formed between the sliding mold (3) and the center mold (4), and a second forming cavity is formed between the center mold (4) and the top mold (5). The first forming cavity and the second forming cavity are interconnected.

3. The injection molding machine for processing EVA slippers according to claim 2, characterized in that: The base (1) has two parallel guide rails (8) fixedly connected to its top. The base (1) has a filling port (9) in the middle of its rear end and a threaded hole (10) in the middle of its front end.

4. The injection molding machine for processing EVA slippers according to claim 1, characterized in that: The sliding mold (3) has two parallel connecting grooves (11) at its bottom, and the sliding mold (3) slides with the guide rail (8) through the connecting grooves (11).

5. The injection molding machine for processing EVA slippers according to claim 4, characterized in that: A U-shaped pull rod (12) is fixedly connected to the front side of the sliding mold (3). An installation sleeve (13) is fixedly connected to the end of the pull rod (12) away from the sliding mold (3). A self-tightening bolt (14) is slidably connected inside the installation sleeve (13).

6. The injection molding machine for processing EVA slippers according to claim 5, characterized in that: The self-tightening bolt (14) passes through the mounting sleeve (13) and is threaded into the threaded hole (10). The pull rod (12) is slidably connected to the front end of the base (1).

7. The injection molding machine for processing EVA slippers according to claim 1, characterized in that: The center mold (4) and the top mold (5) are each provided with an injection port (15) aligned with the injection port (9) at the middle of their rear ends. The center mold (4) and the top mold (5) are provided with heat dissipation pipes inside, and the two ends of the heat dissipation pipes are respectively connected to a connector (16) fixedly set on one side of the center mold (4) and the top mold (5). The center mold (4) and the sliding mold (3) are provided with an exhaust groove (17) on their front sides.

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