A multi-cavity automotive interior mold for low-pressure injection molding

Abstract

This utility model relates to the field of multi-cavity injection molds, and more particularly to a multi-cavity automotive interior mold for low-pressure injection molding. It includes a base plate, a lower mold base fixedly connected to the upper surface of the base plate, four hydraulic rods mounted on the upper surface of the base plate, a top plate fixedly connected to the output end of each hydraulic rod, an upper mold base fixedly connected to the lower surface of the top plate, a bracket fixedly connected to the upper surface of the base plate, an injection barrel fixedly connected to the upper end of the bracket, and a connecting structure on the upper surface of the top plate. The connecting structure includes several connecting rings, each fixedly connected to the top plate, and a connecting ring fixedly connected to the upper surface of each connecting ring. This utility model provides a multi-cavity automotive interior mold for low-pressure injection molding, which allows for convenient injection molding of different cavities. It avoids the disadvantage of insufficient pressure leading to poor molding when injection molding simultaneously, and also achieves the advantage of convenient injection molding of cavities at different distances.

Description

Technical Field

[0001] This utility model relates to the field of multi-cavity injection molds, and in particular to a multi-cavity automotive interior mold for low-pressure injection molding. Background Technology

[0002] Low-pressure injection molding is commonly used in multi-cavity automotive interior molds to improve production efficiency, reduce costs, and enhance product consistency during the production of automotive interior parts. Compared to traditional high-pressure injection molding, low-pressure injection molding features lower pressure and lower temperature, but its application in multi-cavity molds still faces some challenges.

[0003] Existing technologies, such as the invention with publication number CN119858283A, disclose an injection mold for interior door panels of new energy vehicles. This patent uses a workbench, with a lower mold fixedly connected to one side of the upper surface of the workbench. Limiting rods are fixedly connected to the four corners of the upper surface of the lower mold, and a top plate is fixedly connected to the upper end of each limiting rod. An upper mold is slidably connected to each limiting rod. Multiple horizontally arranged molding cavities are provided at the upper end of the lower mold and the lower end of the upper mold. Multiple demolding rods are inserted into and slidably connected to the bottom of the lower mold. When the lower mold and upper mold are in contact, multiple complete armrest molding cavities can be formed. An injection molding part unloading mechanism is also provided on the workbench. This invention utilizes the injection molding part unloading mechanism and positioning components. After the injection molding part is ejected, it can be transferred to a storage plate for orderly placement. Because the multiple injection molding parts on the storage plate are relatively neat and orderly, workers can sequentially inspect the quality of the injection molding parts, which is convenient, intuitive, and less prone to errors.

[0004] The inventors discovered during use that the injection speed of low-pressure injection molding in existing technologies is inherently slow. The inability to separate injection cavities means that multiple cavities in the mold must be injected within the same injection cycle, limiting production efficiency. Even with a multi-cavity mold design, it's difficult to simultaneously increase the production rate of multiple cavities. Multi-cavity molds that cannot be separated for injection are difficult to debug and maintain if problems arise. Because all cavities share the same injection process, troubleshooting often requires checking the entire system individually, rather than adjusting or repairing a single cavity. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the difficulty in individually injection molding multiple cavities.

[0006] To solve the above technical problems, this utility model provides a multi-cavity automotive interior mold for low-pressure injection molding, comprising: a base plate, a lower mold base fixedly connected to the upper surface of the base plate, four hydraulic rods mounted on the upper surface of the base plate, a top plate fixedly connected to the output end of the hydraulic rods, an upper mold base fixedly connected to the lower surface of the top plate, a bracket fixedly connected to the upper surface of the base plate, an injection barrel fixedly connected to the upper end of the bracket, a connecting structure provided on the upper surface of the top plate, the connecting structure comprising a plurality of connecting rings, all of which are fixedly connected to the top plate, a connecting ring fixedly connected to the upper surface of the connecting ring, two slots formed in the inner wall of the connecting ring, a flexible tube fixedly connected to the lower surface of the injection barrel, a connecting pipe fixedly connected to the end of the flexible tube away from the injection barrel, a connector rotatably connected to the arc surface of the connecting pipe, a connecting pipe fixedly connected to the inner wall of the connector, and two locking blocks fixedly connected to the arc surface of the connecting pipe, the locking blocks being adapted to the locking slots.

[0007] The effect achieved by the above components is as follows: when different cavities in the mold need to be injected, the connector is pulled to move, the connector moves the connecting tube, the connecting tube moves the flexible tube, the connector moves the connecting pipe, the connecting pipe moves the locking block, then the connecting pipe is aligned with the appropriate connecting ring, then the locking block is aligned with the locking groove, then the connecting pipe is inserted into the connecting groove, then the connector is rotated, the connector moves the connecting pipe, then the connecting pipe moves the locking block into the locking groove for fixation, and then the appropriate cavity is injected.

[0008] Preferably, a sealing sleeve is fixedly connected to the inner wall of the connecting ring, and the sealing sleeve is a rubber sleeve.

[0009] The effect achieved by the above components is that the sealing sleeve can increase the sealing between the connecting ring and the connecting pipe, and prevent leakage when the connecting ring and the connecting pipe are connected.

[0010] Preferably, the arc surface of the connector has a plurality of slots, and the plurality of slots are evenly distributed on the connector.

[0011] The effect achieved by the above components is that the groove can increase the friction between the hand and the connector, preventing slippage when the connector is pulled.

[0012] Preferably, the diameter of the connecting tube is the same as the diameter of the connecting ring, and the connecting tube is a plastic tube.

[0013] Preferably, the lower surface of the injection molding barrel is provided with a support structure, the support structure including four fixed rods, the four fixed rods being fixedly connected to the injection molding barrel, the lower end of the fixed rods being fixedly connected to a circular rail, the inner wall of the circular rail being slidably connected to a sliding rod, the lower end of the sliding rod being fixedly connected to a connecting frame, the lower end of the connecting frame being fixedly connected to a support ring, and the hose being located inside the support ring.

[0014] The effect achieved by the above components is as follows: when it is necessary to support the hose, the hose is pulled to move, the hose drives the support ring to move, the support ring drives the connecting frame to move, the connecting frame drives the slide rod to move, the slide rod slides on the inner wall of the circular rail, and after moving to the appropriate position, the support ring supports the hose to prevent the hose from bending and causing accidents during injection molding.

[0015] Preferably, a protective sleeve is fixedly connected to the inner wall of the support ring, and the protective sleeve has a circular cross-section.

[0016] The effect achieved by the above components is that the protective sleeve can protect the hose and prevent excessive wear on the hose when the support ring supports it.

[0017] Preferably, the connecting frame has a U-shaped cross-section and is made of stainless steel.

[0018] The effect achieved by the above components is that the stainless steel material can increase the service life of the connecting bracket and prevent the connecting bracket from rusting during use.

[0019] Compared with related technologies, the multi-cavity automotive interior mold for low-pressure injection molding provided by this utility model has the following beneficial effects:

[0020] By setting up a connecting structure, the injection speed of low-pressure injection molding in existing technologies is inherently slow. The inability to inject separately means that multiple cavities in the entire mold must be injected within the same injection cycle, limiting production efficiency. Even if the mold is designed with multiple cavities, it is difficult to simultaneously increase the production rate of multiple cavities. If a multi-cavity mold that cannot be injected separately has problems, debugging and maintenance are more difficult. Since all cavities share the same injection process, troubleshooting often requires checking the entire system one by one, rather than adjusting or repairing a single cavity. This device achieves the goal of conveniently performing different injections for different cavities, not only avoiding the disadvantage of insufficient pressure and difficulty in molding caused by simultaneous injection, but also achieving the effect of conveniently injecting cavities at different distances.

[0021] By setting up a support structure, the hose can be easily and quickly supported, preventing it from sagging due to its own weight and the weight of the liquid, and it can also be easily adjusted according to the position of the hose. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a multi-cavity automotive interior mold for low-pressure injection molding provided by this utility model;

[0023] Figure 2 for Figure 1 The diagram shows the connection structure.

[0024] Figure 3 for Figure 2 The diagram shows the internal structure.

[0025] Figure 4 for Figure 3 The enlarged view of point A shown;

[0026] Figure 5 for Figure 1 The diagram shows the supporting structure.

[0027] Numbered in the diagram: 1. Base plate; 2. Hydraulic rod; 3. Lower mold base; 4. Upper mold base; 5. Bracket; 6. Injection barrel; 7. Connecting structure; 701. Connecting ring; 702. Connecting ring; 703. Hoose; 704. Connecting pipe; 705. Connector; 706. Groove; 707. Connecting pipe; 708. Sealing sleeve; 709. Locking block; 710. Locking groove; 8. Support structure; 81. Fixing rod; 82. Sliding rod; 83. Connecting frame; 84. Circular rail; 85. Support ring; 86. Protective sleeve; 9. Top plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0030] Please see Figures 1 to 5 This utility model provides a low-pressure injection molding multi-cavity automotive interior mold, comprising: a base plate 1, a lower mold base 3 fixedly connected to the upper surface of the base plate 1, four hydraulic rods 2 installed on the upper surface of the base plate 1, a top plate 9 fixedly connected to the output end of the hydraulic rods 2, an upper mold base 4 fixedly connected to the lower surface of the top plate 9, a bracket 5 fixedly connected to the upper surface of the base plate 1, an injection barrel 6 fixedly connected to the upper end of the bracket 5, a connecting structure 7 provided on the upper surface of the top plate 9, and a supporting structure 8 provided on the lower surface of the injection barrel 6.

[0031] In the embodiments of this utility model, please refer to Figures 2 to 4The connecting structure 7 includes several connecting rings 701, all of which are fixedly connected to the top plate 9. A connecting ring 702 is fixedly connected to the upper surface of the connecting ring 701. Two slots 710 are opened on the inner wall of the connecting ring 702. A hose 703 is fixedly connected to the lower surface of the injection molding barrel 6. A connecting pipe 704 is fixedly connected to the end of the hose 703 away from the injection molding barrel 6. A connector 705 is rotatably connected to the arc surface of the connecting pipe 704. A connecting pipe 707 is fixedly connected to the inner wall of the connector 705. Two locking blocks 709 are fixedly connected to the arc surface of the connecting pipe 707. The locking blocks 709 are adapted to the slots 710. When different cavities in the mold need to be injected, the connector 705 is pulled to move, which in turn moves the connecting tube 704, which in turn moves the hose 703, and the connecting tube 707. The connecting tube 707 then moves the locking block 709. The connecting tube 707 is then aligned with the appropriate connecting ring 702, and the locking block 709 is then aligned with the locking groove 710. The connecting tube 707 is then inserted into the connecting groove, and the connector 705 is rotated. The connector 705 then rotates the connecting tube 707, and the connecting tube 707 moves the locking block 709 into the locking groove 710 for fixation. The appropriate cavity is then injected. A sealing sleeve 708, which is a rubber sleeve, is fixedly connected to the inner wall of the connecting ring 702. The sealing sleeve 708 increases the sealing performance between the connecting ring 702 and the connecting tube 707, preventing leakage when the connecting ring 702 and the connecting tube 707 are connected. The arc surface of the connector 705 has several slots 706 evenly distributed on it. The slots 706 increase the friction between the hand and the connector 705, preventing slippage when pulling the connector 705. The diameter of the connecting tube 707 is the same as the diameter of the connecting ring 702, and the connecting tube 707 is made of plastic.

[0032] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 and Figure 5The support structure 8 includes four fixed rods 81, which are fixedly connected to the injection molding barrel 6. A circular rail 84 is fixedly connected to the lower end of each fixed rod 81. A sliding rod 82 is slidably connected to the inner wall of the circular rail 84. A connecting frame 83 is fixedly connected to the lower end of the sliding rod 82. A support ring 85 is fixedly connected to the lower end of the connecting frame 83. The flexible hose 703 is located inside the support ring 85. When support is needed for the flexible hose 703, it is pulled to move, causing the support ring 85 to move. The support ring 85 then moves the connecting frame 83, which in turn moves the sliding rod 82. The sliding rod 82 slides along the inner wall of the circular rail 84. After moving to the appropriate position, the support ring 85 supports the flexible hose 703, preventing it from bending and causing accidents during injection molding. A protective sleeve 86 is fixedly connected to the inner wall of the support ring 85. The protective sleeve 86 has a circular cross-section. The protective sleeve 86 protects the hose 703, preventing excessive wear on the hose 703 when the support ring 85 supports it. The connecting bracket 83 has a U-shaped cross-section and is made of stainless steel. The stainless steel material increases the service life of the connecting bracket 83 and prevents it from corroding during use.

[0033] The working principle of the multi-cavity automotive interior mold for low-pressure injection molding provided by this utility model is as follows: When different cavities in the mold need to be injected, the connector 705 is pulled to move, the connector 705 drives the connecting pipe 704 to move, the connecting pipe 704 drives the flexible hose 703 to move, the connector 705 drives the connecting pipe 707 to move, the connecting pipe 707 drives the locking block 709 to move, then the connecting pipe 707 is aligned with the appropriate connecting ring 702, then the locking block 709 is aligned with the locking groove 710, and then the coupling... The connector 707 is inserted into the connecting groove, and then the connector 705 is rotated. The connector 705 drives the connecting tube 707 to rotate, and then the connecting tube 707 drives the locking block 709 to be locked into the locking groove 710 for fixation. Then, the appropriate cavity is injection molded. The sealing sleeve 708 can increase the sealing between the connecting ring 702 and the connecting tube 707 to prevent leakage when the connecting ring 702 and the connecting tube 707 are connected. The groove 706 can increase the friction between the hand and the connector 705 to prevent slippage when the connector 705 is pulled.

[0034] When support is needed for the hose 703, the hose 703 is pulled to move it. The hose 703 moves the support ring 85, which in turn moves the connecting frame 83. The connecting frame 83 then moves the sliding rod 82, which slides along the inner wall of the circular rail 84. After moving to the appropriate position, the support ring 85 supports the hose 703 to prevent it from bending and causing accidents during injection molding. The protective sleeve 86 protects the hose 703 from excessive wear caused by the support ring 85. The stainless steel material increases the service life of the connecting frame 83 and prevents it from rusting during use.

[0035] The circuits and controls involved in this utility model are all existing technologies and will not be described in detail here.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-cavity automotive interior mold for low pressure injection molding, characterized by, include: A base plate (1) is provided, and a lower mold base (3) is fixedly connected to the upper surface of the base plate (1). Four hydraulic rods (2) are installed on the upper surface of the base plate (1). A top plate (9) is fixedly connected to the output end of the hydraulic rods (2). An upper mold base (4) is fixedly connected to the lower surface of the top plate (9). A bracket (5) is fixedly connected to the upper surface of the base plate (1). An injection barrel (6) is fixedly connected to the upper end of the bracket (5). A connecting structure (7) is provided on the upper surface of the top plate (9). The connecting structure (7) includes several connecting rings (701). All of the connecting rings (701) are fixedly connected to the top plate (9). A connecting ring (702) is fixedly connected to the upper surface of the connecting ring (701). Two slots (710) are opened on the inner wall of the connecting ring (702). A hose (703) is fixedly connected to the lower surface of the injection molding barrel (6). A connecting pipe (704) is fixedly connected to the end of the hose (703) away from the injection molding barrel (6). A connector (705) is rotatably connected to the arc surface of the connecting pipe (704). A connecting pipe (707) is fixedly connected to the inner wall of the connector (705). Two locking blocks (709) are fixedly connected to the arc surface of the connecting pipe (707). The locking blocks (709) are adapted to the slots (710).

2. The multi-cavity automotive interior mold for low-pressure injection molding according to claim 1, characterized in that, The inner wall of the connecting ring (702) is fixedly connected with a sealing sleeve (708), which is a rubber sleeve.

3. The multi-cavity automotive interior mold for low-pressure injection molding according to claim 1, characterized in that, The connector (705) has a plurality of slots (706) on its arc surface, and the plurality of slots (706) are evenly distributed on the connector (705).

4. A multi-cavity automotive interior mold for low-pressure injection molding according to claim 1, characterized in that, The diameter of the connecting tube (707) is the same as the diameter of the connecting ring (702), and the connecting tube (707) is a plastic tube.

5. A multi-cavity automotive interior mold for low-pressure injection molding according to claim 1, characterized in that, The lower surface of the injection molding barrel (6) is provided with a support structure (8). The support structure (8) includes four fixed rods (81). The four fixed rods (81) are fixedly connected to the injection molding barrel (6). The lower end of the fixed rod (81) is fixedly connected to a circular rail (84). The inner wall of the circular rail (84) is slidably connected to a sliding rod (82). The lower end of the sliding rod (82) is fixedly connected to a connecting frame (83). The lower end of the connecting frame (83) is fixedly connected to a support ring (85). The hose (703) is located inside the support ring (85).

6. A multi-cavity automotive interior mold for low-pressure injection molding according to claim 5, characterized in that, The inner wall of the support ring (85) is fixedly connected to a protective sleeve (86), and the cross-section of the protective sleeve (86) is circular.

7. A multi-cavity automotive interior mold for low-pressure injection molding according to claim 5, characterized in that, The cross-section of the connecting frame (83) is U-shaped, and the connecting frame (83) is a stainless steel frame.

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