A mold fixing device for injection molding of automobile fuel tanks

Abstract

This utility model discloses a mold fixing device for injection molding of automotive fuel tanks, including a base with a movable groove. A fixed rod is fixed inside the movable groove, and two movable rods are slidably connected inside the fixed rod. Sliding grooves are formed on opposite sides of the two movable rods, and a round rod is fixed inside the sliding groove. A movable block is slidably connected to the outer wall of the round rod. In this mold fixing device for injection molding of automotive fuel tanks, the mold is placed inside the movable groove, and a bidirectional screw rotates. The rotation of the bidirectional screw causes the two movable rods, the movable block, the clamping frame, and the extrusion plate to close. The extrusion plate contacts the edge of the mold, and the extrusion plate pushes the mold to move, positioning the mold at the center. Then, the extrusion plate continues to move, and the mold extrudes the extrusion plate outward. The extrusion plate moves the clamping frame, moving it to a corner of the mold, where the clamping frame clamps the mold, allowing the clamping frame to adapt to the mold.

Description

Technical Field

[0001] This utility model relates to the field of fixing device technology, specifically a mold fixing device for injection molding of automobile fuel tanks. Background Technology

[0002] Most automotive fuel tanks are made of plastic using injection molding. The stability of the injection mold directly affects the molding quality and dimensional accuracy of the fuel tank product. During the injection molding process, the mold needs to be firmly and precisely fixed to prevent displacement or vibration under the impact of high-pressure molten plastic, thereby avoiding quality problems such as flash, material shortage, and dimensional deviations.

[0003] Currently, fixing injection molds requires manually adjusting the mold to the center position before fixing it. However, the position moved manually is not accurate, making the fixing and installation process cumbersome and inefficient. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a mold fixing device for injection molding of automotive fuel tanks, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a mold fixing device for injection molding of automobile fuel tank, including a base, a movable groove is provided on the base, a fixed rod is fixed inside the movable groove, two movable rods are slidably connected inside the fixed rod, a sliding groove is provided on the opposite side of the two movable rods, a round rod is fixed inside the sliding groove, and a movable block is slidably connected to the outer wall of the round rod;

[0006] A clamping frame is fixed to one side of the movable block, and a pressing plate is fixed to the top of the clamping frame. Two fixing plates are fixed to one side of the base. A bidirectional screw is rotatably connected between the fixing plates. The outer side wall of the bidirectional screw passes through the two movable rods and is screwed to the movable rods. Two compression springs are sleeved on the outer side of the round rod. A round groove is opened on the top of the base.

[0007] Preferably, a motor is fixed to one side of one of the fixing plates, and the output shaft of the motor is fixedly connected to a bidirectional screw.

[0008] Preferably, the top of the base is fixed with two support plates, and a limit screw and a limit rod are rotatably connected between the two support plates. Two limit strips are screwed to the outer wall of the limit screw, and the limit rod passes through the limit strips.

[0009] Preferably, the bottom height of the two extrusion plates on the side closer to the motor is higher than the top height of the other two extrusion plates.

[0010] Preferably, a rubber pad is fixed inside the clamping frame on the side away from the extrusion plate.

[0011] Preferably, the extrusion plate has a rotating groove inside, and a rotating belt is provided inside the rotating groove.

[0012] Beneficial effects

[0013] This utility model provides a mold fixing device for injection molding of automotive fuel tanks. Compared with the prior art, it has the following advantages:

[0014] This mold fixing device for automotive fuel tank injection molding uses a compression spring, a moving block, and an extrusion block to place the mold inside a movable slot. The rotation of the bidirectional screw causes two moving rods, the movable block, the clamping frame, and the extrusion plate to close. The extrusion plate contacts the edge of the mold, pushing it to the center. The extrusion plate continues to move, and the mold extrudes the extrusion plate outwards. The extrusion plate moves the clamping frame, moving it to a corner of the mold, where it clamps the mold, thus facilitating mold fixing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the base in this utility model;

[0017] Figure 3 This is a schematic diagram of the extrusion plate in this utility model.

[0018] In the diagram: 1. Base; 2. Movable groove; 3. Fixed rod; 4. Moving rod; 5. Slide groove; 6. Round rod; 7. Moving block; 8. Clamping frame; 9. Extrusion plate; 10. Fixed plate; 11. Bidirectional screw; 12. Compression spring; 13. Motor; 14. Rubber pad; 15. Rotary groove; 16. Rotating belt; 17. Round groove; 18. Support plate; 19. Limiting screw; 20. Limiting rod; 21. Limiting strip. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 3This utility model provides a technical solution: a mold fixing device for injection molding of automotive fuel tanks, including a base 1, a movable groove 2 on the base 1, a fixed rod 3 fixed inside the movable groove 2, two movable rods 4 slidably connected inside the fixed rod 3, and sliding grooves 5 on opposite sides of the two movable rods 4, a round rod 6 fixed inside the sliding groove 5, a movable block 7 slidably connected to the outer wall of the round rod 6, a clamping frame 8 fixed to one side of the movable block 7, an extrusion plate 9 fixed to the top of the clamping frame 8, two fixing plates 10 fixed to one side of the base 1, and a bidirectional screw 11 rotatably connected between the fixing plates 10. The outer wall of rod 11 passes through two movable rods 4 and is screwed to the movable rods 4. Two compression springs 12 are sleeved on the outer side of the round rod 6. A round groove 17 is opened on the top of the base 1, so that the extrusion mold can be located in the middle and the clamping frame 8 can adaptively clamp the corner of the extrusion mold. A motor 13 is fixed on one side of a fixed plate 10. The output shaft of the motor 13 is fixedly connected to the bidirectional screw 11, so that the bidirectional screw 11 can rotate. The bottom height of the two extrusion plates 9 on the side near the motor 13 is higher than the top height of the other two extrusion plates 9, so that the closing extrusion plates 9 are staggered to prevent them from hitting each other.

[0021] Furthermore, two support plates 18 are fixed to the top of the base 1. A limiting screw 19 and a limiting rod 20 are rotatably connected between the two support plates 18. Two limiting strips 21 are screwed to the outer wall of the limiting screw 19. The limiting rod 20 passes through the limiting strips 21. After the clamping frame 8 is clamped, the limiting screw 19 is manually rotated. The limiting screw 19 is also a bidirectional screw, which causes the limiting strips 21 to close and limit the extrusion plate 9 to prevent the extrusion mold from moving. A rubber pad 14 is fixed to the side of the clamping frame 8 away from the extrusion plate 9 to reduce damage to the mold. A rotating groove 15 is opened inside the extrusion plate 9. A rotating belt 16 is installed inside the rotating groove 15. When the extrusion plate 9 extrudes the extrusion mold, the rotating belt 16 contacts the extrusion mold, which can reduce friction on the extrusion mold.

[0022] During operation, the injection mold is first placed stably in the circular groove 17 at the top of the base 1. Then, the motor 13 is started, which drives the bidirectional screw 11 to rotate. Since the bidirectional screw 11 is threadedly connected to the two moving rods 4, and the moving rods 4 are restricted to sliding only along the fixed rod 3, the two moving rods 4 will move towards each other and converge towards the center of the mold. The moving rods 4 drive the sliding groove 5, circular rod 6, moving block 7, clamping frame 8, and extrusion plate 9 on them to move towards the mold. Initially, the four extrusion plates 9 will first contact the side edges of the mold, and then continue to push... Under the pressure, the extrusion plate 9 exerts a pushing force on the mold, causing it to finely adjust and precisely align with the center position of the base 1. As the moving rod 4 continues to close, the side wall of the mold exerts a reverse force on the extrusion plate 9. This force is transmitted to the moving block 7, overcoming the elastic force of the compression spring 12 and pushing the moving block 7 to slide outward away from the mold along the round rod 6. The compression spring 12 is compressed, accumulating elastic force. This process allows the clamping frame 8 to adaptively adjust its contact position with the mold side wall, ultimately ensuring that the inner surface of the clamping frame 8, especially the rubber pad 14 on it, fits tightly and flexibly. It is clamped at the corners or side walls of the mold, achieving multi-point adaptive flexible clamping, avoiding damage to the mold from rigid impacts. During this process, the rotating belt 16 inside the extrusion plate 9 rolls in contact with the mold edge, effectively reducing friction. After the clamping frame 8 stably clamps the mold, to further enhance the fixing effect and prevent minor displacement of the mold during injection molding, the limiting screw 19 can be manually rotated. The rotation of the limiting screw 19 will drive the two limiting strips 21 on it to move towards each other along the limiting rod 20 until the inner side of the limiting strip 21 tightly abuts against the extrusion plate located on the inner side. The back of plate 9 provides solid axial support, greatly enhancing the rigidity and stability of the entire fixing device. After the mold is fixed, injection molding can be performed. After the operation is completed, first rotate the limit screw 19 in the reverse direction to make the limit bar 21 retract, and then start the motor 13 in the reverse direction to make the bidirectional screw 11 rotate in the reverse direction, driving the two moving rods 4 to move in opposite directions. All clamping parts are reset under the action of the rebound force of the compression spring 12, releasing the clamping of the mold, and the mold can be removed. The compression spring 12 is an industrial heavy-duty spring with a spring force of up to 50,000 N.

[0023] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold fixing device for injection molding of automobile fuel tanks, comprising a base (1), characterized in that: The base (1) has an movable groove (2), and a fixed rod (3) is fixed inside the movable groove (2). Two movable rods (4) are slidably connected inside the fixed rod (3). Sliding grooves (5) are provided on the opposite sides of the two movable rods (4). A round rod (6) is fixed inside the sliding groove (5). A moving block (7) is slidably connected to the outer wall of the round rod (6). A clamping frame (8) is fixed on one side of the movable block (7), and a pressing plate (9) is fixed on the top of the clamping frame (8). Two fixing plates (10) are fixed on one side of the base (1). A bidirectional screw (11) is rotatably connected between the fixing plates (10). The outer wall of the bidirectional screw (11) passes through the two movable rods (4) and is screwed to the movable rods (4). Two compression springs (12) are sleeved on the outer side of the round rod (6). A round groove (17) is opened on the top of the base (1).

2. The mold fixing device for injection molding of automobile fuel tanks according to claim 1, characterized in that: A motor (13) is fixed to one side of one of the fixed plates (10), and the output shaft of the motor (13) is fixedly connected to a bidirectional screw (11).

3. The mold fixing device for injection molding of automobile fuel tanks according to claim 2, characterized in that: The top of the base (1) is fixed with two support plates (18), and a limit screw (19) and a limit rod (20) are rotatably connected between the two support plates (18). Two limit strips (21) are screwed onto the outer side wall of the limit screw (19), and the limit rod (20) passes through the limit strips (21).

4. The mold fixing device for injection molding of automobile fuel tanks according to claim 3, characterized in that: The bottom height of the two extrusion plates (9) on the side closest to the motor (13) is higher than the top height of the other two extrusion plates (9).

5. The mold fixing device for injection molding of automobile fuel tanks according to claim 4, characterized in that: A rubber pad (14) is fixed inside the clamping frame (8) on the side away from the extrusion plate (9).

6. The mold fixing device for injection molding of automobile fuel tanks according to claim 5, characterized in that: The extrusion plate (9) has a rotating groove (15) inside, and a rotating belt (16) is provided inside the rotating groove (15).

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