A double ejector structure for injection molding with a submarine gate

Abstract

This application relates to the field of injection molding technology and discloses a double ejection structure with a submarine gate, including a moving mold and a fixed mold. The moving mold and the fixed mold are in contact. The fixed mold has a submarine gate, and the moving mold has a gate runner. The submarine gate and the gate runner are connected. The moving mold has two ejector pin holes, and ejector pins are slidably installed in the ejector pin holes. The ejector pin holes are connected to the gate runner, and the lower ends of the ejector pins pass through the ejector pin holes. The lower ends of the two ejector pins are connected to a fixed plate. Pulleys are symmetrically fixedly installed on the lower end of the moving mold, and pull ropes are provided on the pulleys. The other ends of the two pull ropes are connected to a pull plate. The technical solution of this application, through the mutual cooperation of the moving mold, fixed mold, submarine gate, gate runner, ejector pins, fixed plate, pulleys, pull ropes, pull plate, and first spring, can make the ejected part of the injection molded product be ejected under balanced force, protecting the surface appearance of the injection molded product and the mirror surface of the mold, thereby improving the overall production quality.

Description

Technical Field

[0001] This application relates to the field of injection molding technology, specifically to a double ejector structure for injection molding submerged gates. Background Technology

[0002] Currently, with the development of automotive lighting technology, the shapes of lighting fixtures are becoming increasingly diversified. Due to factors such as the shape and appearance requirements of automotive lighting products, the requirements for product appearance and performance have been greatly improved. Therefore, some products will use spot gate or submarine gate injection molding. Among them, submarine gate injection molding will produce gate waste parts after molding at the gate and gate runner. The gate waste parts are usually ejected along with the injection molded product after the mold is opened.

[0003] However, current submarine gates generally only have a single ejector pin. Since the submarine gate is close to the edge of the product, it is difficult to ensure balanced force when using a single ejector pin to eject the gate waste part, which affects the product production quality. Utility Model Content

[0004] The purpose of this application is to provide a double ejector structure for injection molding with a submarine gate, which solves the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This application provides an injection molding submerged gate double ejection structure, including a moving mold and a fixed mold. The moving mold is in contact with the fixed mold. The fixed mold has a submerged gate, and the moving mold has a gate runner. The submerged gate is connected to the gate runner. The moving mold has two ejector pin holes, and ejector pins are slidably disposed in the ejector pin holes. The ejector pin holes are connected to the gate runner. The lower ends of the ejector pins pass through the ejector pin holes. The lower ends of the two ejector pins are connected to a fixed plate. Pulleys are symmetrically fixedly installed on the lower end of the moving mold. Pull ropes are provided on the pull ropes. The other ends of the two pull ropes are connected to a pull plate, which is located directly below the fixed plate. Two first springs are symmetrically fixedly connected to the lower end of the moving mold. The lower ends of the two first springs are fixedly connected to the fixed plate.

[0006] By adopting the above technical solution, during use, the rubber material is poured into the submerged gate, and the material enters the gate runner for injection molding. When mold opening is required, the pull plate is pulled, and the pull plate moves downward under the force. The movement of the pull plate applies a force to the pull rope, which in turn applies a force to the fixed plate through the pulley. The fixed plate moves vertically under the force, which in turn drives the two ejector rods to move upward. The ejector rods then push the defective part out of the gate runner. At the same time, the elasticity of the first spring can be used to reset the ejector rods. Through the above structure, the defective part from the gate can be ejected under balanced force, protecting the surface appearance of the injection molded product and the mirror surface of the mold, thereby improving the overall production quality.

[0007] Optionally, two limiting tubes are symmetrically fixedly connected to the lower end of the moving mold, and a limiting rod is slidably connected inside the limiting tube. The lower end of the limiting rod passes through the opening of the limiting tube and extends downward and is fixedly connected to the pull plate.

[0008] By adopting the above technical solution, the pull plate is limited, thereby improving the stability of the pull plate during movement.

[0009] Optionally, a second spring is fixedly connected to the bottom of the inner tube of the limiting tube, and the other end of the second spring is fixedly connected to the limiting rod.

[0010] By adopting the above technical solution, the limiting rod is prevented from detaching from the limiting tube.

[0011] Optionally, the pulleys are configured in two sets, with two pulleys in each set, and the pull ropes pass through the two pull ropes in sequence.

[0012] By adopting the above technical solution, the force required to pull the plate is reduced.

[0013] Optionally, the lower end of the moving mold is symmetrically and fixedly connected to two L-shaped support frames, and the fixing plate is set on the support frames.

[0014] By adopting the above technical solution, the fixing plate can be supported.

[0015] Optionally, a handle is fixedly connected to the lower end of the pull plate.

[0016] By adopting the above technical solution, it is convenient to apply force to the pull plate.

[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows: The technical solution of this application, through the coordination of structures such as moving mold, fixed mold, submarine gate, gate runner, ejector pin, fixed plate, pulley, pull rope, pull plate and first spring, can enable the waste parts from the in-situ gate to be ejected under balanced force, protect the surface appearance of the injection molded product and the mirror surface of the mold, thereby improving the overall production quality. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of a double ejector structure for injection molding with a submarine gate according to this application; Figure 2 for Figure 1 Enlarged view of section A; Figure 3 This is a schematic diagram of the internal structure of the limiting tube in a double ejector structure of a submarine injection gate according to this application.

[0019] In the diagram: 1. Moving mold; 2. Fixed mold; 3. Submerged gate; 4. Sprue runner; 5. Ejector pin; 6. Fixed plate; 7. Pulley; 8. Pull rope; 9. Pull plate; 10. First spring; 11. Limit tube; 12. Limit rod; 13. Second spring; 14. Support frame. Detailed Implementation

[0020] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This application provides a technical solution: a double ejection structure with a submarine gate for injection molding, including a moving mold 1 and a fixed mold 2. The moving mold 1 is in contact with the fixed mold 2. The fixed mold 2 has a submarine gate 3. The moving mold 1 has a gate runner 4. The submarine gate 3 is connected to the gate runner 4. The moving mold 1 has two ejector pin holes. An ejector pin 5 is slidably disposed in the ejector pin hole. The ejector pin hole is connected to the gate runner 4. The lower end of the ejector pin 5 passes through the ejector pin hole. The lower ends of the two ejector pins 5 are connected to a fixed plate 6. Pulleys 7 are symmetrically fixedly installed on the lower end of the moving mold 1. Pull ropes 8 are disposed on the pull ropes 7. The other ends of the two pull ropes 8 are connected to a pull plate 9. The pull plate 9 is located directly below the fixed plate 6. Two first springs 10 are symmetrically fixedly connected to the lower end of the moving mold 1. The lower ends of the two first springs 10 are fixedly connected to the fixed plate 6.

[0022] In the technical solution of this application, during use, the rubber material is poured into the submarine gate 3, and the rubber material enters the gate runner 4 for injection molding. When mold opening is required, the pull plate 9 is pulled, and the pull plate 9 moves downward under the force. The movement of the pull plate 9 applies a force to the pull rope 8, and the pull rope 8 applies a force to the fixed plate 6 through the pulley 7. The fixed plate 6 moves vertically under the force, and the movement of the fixed plate 6 drives the two ejector rods 5 to move upward. The ejector rods 5 eject the defective part from the gate runner 4. At the same time, the elasticity of the first spring 10 can make the ejector rods 5 return to their original position. Through the above structure, the defective part of the gate can be ejected under balanced force, protecting the surface appearance of the injection molded product and the mirror surface of the mold, thereby improving the overall production quality.

[0023] In the technical solution of this application, two limiting tubes 11 are symmetrically fixedly connected to the lower end of the moving mold 1. A limiting rod 12 is slidably connected inside the limiting tube 11. The lower end of the limiting rod 12 passes through the opening of the limiting tube 11 and extends downward and is fixedly connected to the pull plate 9 to limit the pull plate 9 and improve the stability of the pull plate 9 during movement.

[0024] In the technical solution of this application, a second spring 13 is fixedly connected to the bottom of the inner tube of the limiting tube 11, and the other end of the second spring 13 is fixedly connected to the limiting rod 12 to prevent the limiting rod 12 from detaching from the limiting tube 11.

[0025] In the technical solution of this application, the pulleys 7 are set in two sets, with two pulleys in each set, and the pull ropes 8 are arranged to pass through the two pull ropes 8 in sequence, thereby reducing the force required for the pull plate 9.

[0026] In the technical solution of this application, two L-shaped support frames 14 are symmetrically fixedly connected to the lower end of the moving mold 1, and the fixing plate 6 is set on the support frame 14 to support the fixing plate 6.

[0027] In the technical solution of this application, a handle is fixedly connected to the lower end of the pull plate 9 to facilitate applying force to the pull plate 9.

[0028] In use, the rubber material is poured into the submarine gate 3 and enters the gate runner 4 for injection molding. When mold opening is required, the pull plate 9 is pulled. The pull plate 9 moves downward under the force, and the movement of the pull plate 9 applies a force to the pull rope 8. The pull rope 8 applies a force to the fixed plate 6 through the pulley 7. The fixed plate 6 moves vertically under the force, and the movement of the fixed plate 6 drives the two ejector rods 5 to move upward. The ejector rods 5 push the defective part out of the gate runner 4. At the same time, the elasticity of the first spring 10 can be used to reset the ejector rods 5.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An injection molding latent gate double ejection structure comprising a movable mold (1) and a fixed mold (2), the movable mold (1) and the fixed mold (2) are arranged in contact, characterized in that: The fixed mold (2) is provided with a submarine gate (3), and the moving mold (1) is provided with a gate runner (4). The submarine gate (3) is connected to the gate runner (4). The moving mold (1) is provided with two ejector pin holes. An ejector pin (5) is slidably arranged in the ejector pin hole. The ejector pin hole is connected to the gate runner (4). The lower end of the ejector pin (5) passes through the ejector pin hole. The lower ends of the two ejector pins (5) are connected to a fixed plate (6). The lower end of the moving mold (1) is symmetrically fixedly installed with pulleys (7). Pull ropes (8) are provided on the pulleys (7). The other ends of the two pull ropes (8) are connected to a pull plate (9). The pull plate (9) is located directly below the fixed plate (6). The lower end of the moving mold (1) is symmetrically fixedly connected with two first springs (10). The lower ends of the two first springs (10) are fixedly connected to the fixed plate (6).

2. The injection molding submarine gate double ejection structure according to claim 1, characterized in that, The lower end of the moving mold (1) is symmetrically fixedly connected to two limiting tubes (11). A limiting rod (12) is slidably connected inside the limiting tube (11). The lower end of the limiting rod (12) passes through the opening of the limiting tube (11) and extends downward and is fixedly connected to the pull plate (9).

3. The injection molding submarine gate double ejection structure according to claim 2, characterized in that, The bottom of the inner tube of the limiting tube (11) is fixedly connected to a second spring (13), and the other end of the second spring (13) is fixedly connected to the limiting rod (12).

4. The injection molding submarine gate double ejection structure according to claim 1, characterized in that, The pulleys (7) are set in two groups, with two pulleys in each group, and the pull ropes (8) pass through the two pull ropes (8) in sequence.

5. The injection molding submarine gate double ejection structure according to claim 1, characterized in that, The lower end of the moving mold (1) is symmetrically fixedly connected to two L-shaped support frames (14), and the fixing plate (6) is set on the support frame (14).

6. The injection molding submarine gate double ejection structure according to claim 1, characterized in that, A handle is fixedly connected to the lower end of the pull plate (9).

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