A molding die for a thermoplastic composite

Abstract

The utility model relates to mould technical field, concretely is a kind of thermoplastic composite's forming die, including upper die, lower die and injection part, the upper die and lower die junction are equipped with mould cavity, the mould cavity is used to accommodate injection material, the injection part is used to inject injection material to mould cavity, the upper die and lower die are all equipped with gas auxiliary demoulding part, the gas auxiliary demoulding part is connected with external gas source, also with mould cavity intercommunication, for leading external gas source to mould cavity, make injection moulding model from mould cavity demoulding. The utility model is through the setting of the exhaust hole of little diameter (0.2~0.5mm), high-pressure gas generated by external air compressor is discharged from the exhaust hole, can form a layer of gas film between product and mould cavity wall surface, uniformly exert demoulding force, make product successfully separate from mould cavity, to realize high-efficiency, lossless gas auxiliary demoulding.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a molding mold for thermoplastic composite materials. Background Technology

[0002] After injection molding, thermoplastic composite materials often present a significant challenge in demolding due to the adhesion and shrinkage forces between the material and the mold cavity walls. This is especially true for products with complex structures, deep cavities, or fine textures. Traditional ejector pin demolding methods can easily lead to surface scratches, whitening, or even deformation and damage, severely impacting product quality and yield. Utility Model Content

[0003] The main objective of this invention is to provide a molding die for thermoplastic composite materials to solve the problems raised in related technologies.

[0004] To achieve the above objectives, according to one aspect of the present invention, a molding die for a thermoplastic composite material is provided, comprising an upper die, a lower die, and an injection molding part. A mold cavity is provided at the junction of the upper die and the lower die, the mold cavity being used to accommodate injection molding material. The injection molding part is used to inject injection molding material into the mold cavity. An air-assisted demolding part is provided on both the upper die and the lower die, the air-assisted demolding part being connected to an external air source and communicating with the mold cavity, for guiding the external air source to the mold cavity, thereby causing the injection-molded mold to be ejected from the mold cavity.

[0005] Furthermore, the lower mold includes a base and a lower mold base, the lower mold base being bolted to the upper surface of the base, and the mold cavity of the lower mold being located on the upper surface of the lower mold base.

[0006] Furthermore, the upper mold includes a pressure top and an upper mold base, the upper mold base being bolted to the lower surface of the pressure top, and the mold cavity of the upper mold being located on the lower surface of the upper mold base.

[0007] Furthermore, the gas-assisted demolding section includes several cavities disposed in the lower mold base and the upper mold base. Each cavity has an air inlet channel communicating with the outside on one side. The cavity is conical in shape and extends to the mold cavity to form an exhaust hole.

[0008] Furthermore, the diameter of the vent hole is 0.2~0.5mm.

[0009] Compared with the prior art, the present invention has the following beneficial effects: This invention features a small-diameter (0.2~0.5mm) vent hole. High-pressure gas generated by an external air compressor is discharged through the vent hole, forming an air film between the product and the mold cavity wall. This uniformly applies demolding force, allowing the product to separate smoothly from the mold cavity, thus achieving efficient and non-destructive air-assisted demolding. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the lower mold body of this utility model.

[0011] Figure label: 1. Base; 2. Lower mold base; 3. Top platen; 4. Upper mold base; 5. Injection port; 6. Hot runner; 9. Mold cavity; 91. Vent hole; 92. Chamber; 11. Air inlet. Detailed Implementation

[0012] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0013] This embodiment provides a molding die for thermoplastic composite materials, such as... Figure 1 As shown, the mold mainly includes an upper mold, a lower mold, and an injection molding section. After the upper and lower molds are closed, their junction forms a mold cavity 9 for molding the product. The injection molding section is used to inject molten injection molding material into the mold cavity 9. The key improvement of this utility model is that air-assisted demolding sections are provided on both the upper and lower molds. These air-assisted demolding sections are connected to an external air source (such as an air compressor) to introduce high-pressure gas into the mold cavity 9 during the demolding stage, assisting in the demolding of the product.

[0014] like Figure 2 As shown, the injection section includes an injection port 5 and a hot runner 6 connected thereto. The hot runner 6 is connected to the mold cavity 9. Injection material is pressed into the injection port 5, and the injection material flows through the hot runner 6 and finally enters the mold cavity 9.

[0015] The lower mold is the fixed part of the mold, which includes a base 1 and a lower mold base 2. The lower mold base 2 is fixedly mounted on the upper surface of the base 1 by bolts. The mold cavity 9 of the lower mold part is opened on the upper surface of the lower mold base 2.

[0016] The upper mold is the movable part of the mold, comprising a pressure cap 3 and an upper mold base 4. The upper mold base 4 is fixedly mounted on the lower surface of the pressure cap 3 by bolts. The mold cavity 9 of the upper mold is formed on the lower surface of the upper mold base 4. When injection molding is required, the upper mold base 4 and the lower mold base 2 are fixedly connected together by bolts. At this time, the mold cavity 9 on the upper mold base 4 and the mold cavity 9 on the lower mold base 2 are precisely aligned to form a complete cavity. The molten injection material is held under pressure and cooled within the mold cavity 9 to form the desired injection mold.

[0017] like Figure 3As shown, to achieve the gas-assisted demolding function, gas-assisted demolding parts are provided on both the upper and lower molds. Each gas-assisted demolding part includes several cavities 92 disposed inside the lower mold base 2 and the upper mold base 4. The bottoms of each cavity 92 are interconnected, and one side of its bottom is provided with an air inlet 11 communicating with the outside. The cavity 92 is conical. The end of the cavity 92 extends to the wall of the mold cavity 9, forming an extremely small vent 91. The diameter of this vent 91 is strictly controlled between 0.2mm and 0.5mm, preferably 0.3mm in this embodiment. This small aperture design prevents molten injection material from entering and helps to generate a powerful airflow when high-pressure gas is introduced, while also avoiding leaving obvious marks on the surface of the product, ensuring a high yield.

[0018] The working process is as follows: Injection material is forced into injection port 5, flows through hot runner 6, and finally enters mold cavity 9. After cooling and molding, when the injection molding process is completed and demolding is required, high-pressure gas generated by an external air compressor is introduced into cavity 92 through air inlet 11, and then overflows from various vent holes 91. Finally, it is ejected into mold cavity 9 through the tiny vent hole 91. This high-pressure gas forms an air film between the product and the wall of mold cavity 9, uniformly applying demolding force, allowing the product to separate smoothly from mold cavity 9, thus achieving efficient and non-destructive air-assisted demolding.

[0019] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A molding die for a thermoplastic composite material, comprising an upper die, a lower die, and an injection molding part, wherein a mold cavity (9) is provided at the junction of the upper die and the lower die, the mold cavity (9) being used to accommodate injection molding material, and the injection molding part being used to inject injection molding material into the mold cavity (9), characterized in that, Both the upper and lower molds are provided with air-assisted demolding parts. The air-assisted demolding parts are connected to an external air source and also communicate with the mold cavity (9). They are used to guide the external air source to the mold cavity (9) so that the injection-molded model can be ejected from the mold cavity (9).

2. The molding die for the thermoplastic composite material according to claim 1, characterized in that, The lower mold includes a base (1) and a lower mold base (2). The lower mold base (2) is bolted to the upper surface of the base (1), and the mold cavity (9) of the lower mold is located on the upper surface of the lower mold base (2).

3. The molding die for the thermoplastic composite material according to claim 2, characterized in that, The upper mold includes a pressure top (3) and an upper mold base (4). The upper mold base (4) is bolted to the lower surface of the pressure top (3), and the mold cavity (9) of the upper mold is located on the lower surface of the upper mold base (4).

4. The molding die for the thermoplastic composite material according to claim 3, characterized in that, The gas-assisted demolding part includes several cavities (92) disposed in the lower mold base (2) and the upper mold base (4). Each cavity (92) has an air inlet (11) communicating with the outside on one side. The cavity (92) is conical and extends to the mold cavity (9) to form an exhaust hole (91).

5. The molding die for the thermoplastic composite material according to claim 4, characterized in that, The diameter of the exhaust port (91) is 0.2~0.5mm.

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