A high-precision mold for automotive plastic products

Abstract

The utility model discloses a high-precision mold for automobile plastic products, which relates to the technical field of automobile molds, including a fixed mold plate, a cushion block is arranged below the fixed mold plate, a movable mold bottom plate is arranged on the upper side of the cushion block, a movable mold frame is arranged on the lower side of the fixed mold plate, a casting sleeve is arranged on the upper side of the center of the fixed mold plate, a fixed core is arranged at the center of the movable mold frame, and a conical column flow channel is arranged below the fixed core. The utility model sets an optimized flow channel layout to improve the fluidity of the plastic material, ensure the uniform filling of the mold cavity, reduce the heat shrinkage and deformation of the molded parts, improve the dimensional accuracy, cooperate with the balanced flow channel design, reduce the stress concentration of the product, reduce the demoulding force, and avoid the problem of uneven product thickness, improve the dimensional consistency of the produced parts, and the set gas-assisted injection port provides additional thrust during the demoulding process to help the molded parts to smoothly leave the mold, reduce the demoulding force, reduce the demoulding damage rate, and facilitate the demoulding operation.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile molds, in particular to a high-precision mold for automobile plastic products. Background Art

[0002] Automotive plastic products refer to various parts and components made of plastic materials that are widely used in the automotive manufacturing industry. Automotive plastic product molds are key tools for manufacturing various types of automotive plastic parts. Injection molds are the most commonly used type of automotive plastic product molds. They are mainly used in injection molding processes. In this process, the plastic raw materials are heated and melted, and then injected into the mold cavity of the mold under the pressure of the injection machine. Then, after the steps of pressure holding, cooling and demolding, the required automotive parts are finally formed. At present, the gate and runner layout of automotive plastic product molds are unreasonable, resulting in uneven filling of the plastic melt, forming defects such as weld marks and bubbles, affecting the precision and quality of the product. For plastic parts with complex structures, improper design of the demolding mechanism or failure to use appropriate auxiliary demolding technology makes the demolding process difficult and easily leads to product damage. Therefore, the present invention proposes a high-precision mold for automotive plastic products to solve the problems mentioned in the above background technology. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and provides a high-precision mold for automobile plastic products.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A high-precision mold for automobile plastic products, comprising a fixed mold plate, a cushion block is arranged below the fixed mold plate, a movable mold bottom plate is arranged on the upper side of the cushion block, a movable mold frame is arranged on the lower side of the fixed mold plate, a casting sleeve is arranged on the upper side of the center of the fixed mold plate, a fixed core is arranged at the center of the movable mold frame, and a conical column flow channel is arranged below the fixed core. The conical flow channel can help discharge gas and impurities generated during the pouring process, reduce bubbles and defects inside the product, and make the plastic material fill the mold cavity more evenly during the pouring process, avoid problems such as heat shrinkage and deformation of the product, ensure the consistency of product size and shape, reduce resistance during the pouring process, and improve the fluidity of the plastic material. The conical column flow channel is connected with a plurality of balancing flow channels. For the setting of the balancing flow channel for a multi-cavity mold, the flow channel should strive to have consistent length and cross-sectional dimensions to ensure that each cavity is filled synchronously and avoid deformation and uneven stress caused by unbalanced filling. An upper mold is arranged on the lower side of the movable mold bottom plate, and a bottom mold located below the upper mold is arranged on the upper side of the cushion block.

[0006] Preferably, a fan-shaped gate corresponding to the casting sleeve is arranged at the inner center of the fixed template, and the fan-shaped gate is connected to the lower fixed core. The fan-shaped gate facilitates the control of the filling speed and direction and reduces stress concentration and deformation.

[0007] Preferably, corresponding straight parting surfaces are arranged between the upper mold and the lower bottom mold. The design of the parting surface makes the draft angle of the product on the parting surface reasonably distributed, avoids problems such as sharp corners and sharp edges, reduces shear force, and reduces molding defects.

[0008] Preferably, the cushion block is provided with a plurality of gas-assisted injection ports connected to the upper bottom mold, and the gas-assisted injection ports can provide additional thrust during the demolding process, thereby helping the molded part to be smoothly separated from the mold, reducing the demolding force, and reducing the demolding damage rate.

[0009] Preferably, a plurality of movable mold inserts are arranged between the fixed mold plate and the lower movable mold frame.

[0010] Preferably, a plurality of core ejector pins are arranged between the movable mold frame and the lower movable mold bottom plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The optimized flow channel layout of the utility model can improve the fluidity of the plastic material, ensure the uniform filling of the mold cavity, reduce the heat shrinkage and deformation of the molded parts, improve the dimensional accuracy, cooperate with the balanced flow channel design, reduce the stress concentration of the product, reduce the demoulding force, and avoid the problem of uneven product thickness, thereby improving the dimensional consistency of the produced parts;

[0013] 2. The utility model can fill the mold cavity more evenly, reduce bubbles and defects, improve the density and surface quality of the product, thereby improving production accuracy, providing additional thrust during the demolding process, helping the molded parts to smoothly leave the mold, reducing the demolding force, reducing the demolding damage rate, and facilitating the demolding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a high-precision mold for automotive plastic products proposed by the utility model;

[0015] Figure 2 This is a front cross-sectional structural schematic diagram of a high-precision mold for automobile plastic products proposed by the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the side sectional structure of a high-precision mold for automobile plastic products.

[0017] In the figure: 1. Fixed mold plate; 2. Cushion block; 3. Casting sleeve; 4. Moving mold frame; 5. Moving mold bottom plate; 6. Fixed core; 7. Core ejector pin; 8. Moving mold insert; 9. Upper mold; 10. Bottom mold; 11. Flat parting surface; 12. Fan-shaped gate; 13. Conical column runner; 14. Balance runner; 15. Gas-assisted injection port. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-3 A high-precision mold for automobile plastic products, comprising a fixed mold plate 1, a cushion block 2 is arranged below the fixed mold plate 1, a movable mold bottom plate 5 is arranged on the upper side of the cushion block 2, a movable mold frame 4 is arranged on the lower side of the fixed mold plate 1, a plurality of movable mold inserts 8 are arranged between the fixed mold plate 1 and the lower movable mold frame 4, a casting sleeve 3 is arranged on the upper side of the center of the fixed mold plate 1, a fixed core 6 is arranged at the center of the movable mold frame 4, a plurality of core ejector pins 7 are arranged between the movable mold frame 4 and the lower movable mold bottom plate 5, and a conical column flow channel 13 is arranged below the fixed core 6. The conical flow channel can help discharge the gas and impurities generated during the pouring process, reduce bubbles and defects inside the product, make the plastic material fill the mold cavity more evenly during the pouring process, avoid problems such as heat shrinkage and deformation of the product, ensure the consistency of product size and shape, reduce the resistance during the pouring process, and improve the fluidity of the plastic material;

[0020] Furthermore, the conical column flow channel 13 is connected to a plurality of balancing flow channels 14. For the setting of the balancing flow channel 14, for a multi-cavity mold, the flow channel should strive to have the same length and cross-sectional size to ensure that each cavity is filled synchronously and avoid deformation and uneven stress caused by unbalanced filling. An upper mold 9 is arranged on the lower side of the movable mold bottom plate 5, and a bottom mold 10 located below the upper mold 9 is arranged on the upper side of the cushion block 2. A fan-shaped gate 12 corresponding to the casting sleeve 3 is arranged at the center of the fixed mold plate 1, and the fan-shaped gate 12 is connected to the lower fixed core 6. The fan-shaped gate 12 is convenient for controlling the filling speed and direction, and reducing stress concentration and deformation.

[0021] Furthermore, corresponding straight parting surfaces 11 are arranged between the upper mold 9 and the lower bottom mold 10. The design of the parting surface makes the draft angle of the product on the parting surface reasonably distributed, avoids problems such as sharp corners and sharp edges, reduces shear force, and reduces molding defects. A plurality of gas-assisted injection ports 15 connected to the upper bottom mold 10 are arranged in the pad 2. The gas-assisted injection ports 15 can introduce compressed air or nitrogen into the mold to help the plastic material fill the mold cavity, reduce the generation of internal voids and bubbles, and thus reduce the defect rate inside the product. Injecting gas through the gas-assisted injection ports 15 can push the plastic material to fully fill every corner and fine structure of the mold cavity, improve the density and surface quality of the molded part, and ensure the consistency and precision of the product. The gas-assisted injection ports 15 can provide additional cooling effect during the injection molding process, accelerate the curing speed of the plastic material, and shorten the molding cycle. The gas-assisted injection ports 15 can provide additional thrust during the demolding process to help the molded part to smoothly separate from the mold, reduce the demolding force, and reduce the demolding damage rate.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-precision mold for automobile plastic products, comprising a fixed mold plate (1), characterized in that: A cushion block (2) is arranged below the fixed mold plate (1), a movable mold base plate (5) is arranged on the upper side of the cushion block (2), a movable mold frame (4) is arranged on the lower side of the fixed mold plate (1), a casting sleeve (3) is arranged on the upper center side of the fixed mold plate (1), a fixed mold core (6) is arranged at the center of the movable mold frame (4), a conical column flow channel (13) is arranged below the fixed mold core (6), a plurality of balancing flow channels (14) are connected in a branching manner to the conical column flow channel (13), an upper mold (9) is arranged on the lower inner side of the movable mold base plate (5), and a bottom mold (10) located below the upper mold (9) is arranged on the upper side of the cushion block (2).

2. The high-precision mold for automotive plastic products according to claim 1, characterized in that: A fan-shaped gate (12) corresponding to the casting sleeve (3) is arranged at the inner center of the fixed mold plate (1), and the fan-shaped gate (12) is connected to the lower fixed core (6).

3. The high-precision mold for automobile plastic products according to claim 1, characterized in that: Corresponding straight parting surfaces (11) are provided between the upper mold (9) and the lower bottom mold (10).

4. The high-precision mold for automobile plastic products according to claim 1, characterized in that: A plurality of gas-assisted injection ports (15) connected to the upper bottom mold (10) are arranged in the cushion block (2).

5. The high-precision mold for automobile plastic products according to claim 1, characterized in that: A plurality of movable mold inserts (8) are arranged between the fixed mold plate (1) and the lower movable mold frame (4).

6. The high-precision mold for automobile plastic products according to claim 1, characterized in that: A plurality of core ejector pins (7) are arranged between the movable mold frame (4) and the lower movable mold bottom plate (5).

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