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Forming mold and forming process for composite material product with complex structure

A composite material and complex structure technology, which is applied in the field of forming molds and forming processes of composite materials products, can solve the problems of pinholes, complex mold manufacturing, uneven heating, etc., so as to save the release time, improve the molding quality, and simplify the mold. effect of structure

Inactive Publication Date: 2021-06-04
上海伽材新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Molding is a common process for forming fiber-reinforced plastic composite materials. It has the advantages of high production efficiency, easy automation, high dimensional accuracy, smooth surface, and one-time molding of products. However, the manufacturing of molding molds is complicated, especially with complex structures such as inner buckles The mold structure of the product is cumbersome and complicated, which increases the manufacturing cost and product demoulding time
[0003] During the molding process of composite materials, heating is usually used to speed up the curing of the product. The heating method is usually electric heating. The advantage is that the heating speed is fast, and the disadvantage is that the heating is uneven, which affects the molding quality of the product, and is prone to lack of glue, pinholes, yellowing, etc. defect

Method used

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  • Forming mold and forming process for composite material product with complex structure
  • Forming mold and forming process for composite material product with complex structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The first step is to soak the air duct in the release agent solution for 30 minutes, take it out, and let it dry naturally for use;

[0051] In the second step, apply the release agent 3 times in the cavities of the insert 4, the upper mold 3 and the lower mold 5, including the interface of the air duct of the insert 4, and install the air duct to the interface of the insert 4;

[0052] The third step is to cut the 10-layer composite material prepreg according to the specified shape, and lay it on the preform jig to form a preform, and take it out for use;

[0053] The fourth step is to place the preform in the mold cavity and close the mold;

[0054]The fifth step is to blow gas into the air duct to the predetermined pressure and maintain it, then circulate the heating oil to maintain 140°C to heat the mold and product for 4 hours;

[0055] The sixth step, after the product is solidified, release the gas in the air duct, and circulate the cooling oil to cool down;

...

Embodiment 2

[0059] The first step is to soak the air duct in the release agent solution for 30 minutes, take it out, and let it dry naturally for use;

[0060] In the second step, apply the release agent 3 times in the cavities of the insert 4, the upper mold 3 and the lower mold 5, including the interface of the air duct of the insert 4, and install the air duct to the interface of the insert 4;

[0061] The third step is to cut the 8-layer composite material prepreg according to the specified shape, and lay it on the preform jig to form a preform, and take it out for use;

[0062] The fourth step is to place the preform in the mold cavity and close the mold;

[0063] The fifth step is to blow gas into the air duct to the predetermined pressure and maintain it, then circulate the heating oil and maintain 140°C to heat the mold and product for 3 hours;

[0064] The sixth step, after the product is solidified, release the gas in the air duct, and circulate the cooling oil to cool down;

...

Embodiment 3

[0068] The first step is to soak the air duct in the release agent solution for 30 minutes, take it out, and let it dry naturally for use;

[0069] In the second step, apply the release agent 3 times in the cavities of the insert 4, the upper mold 3 and the lower mold 5, including the interface of the air duct of the insert 4, and install the air duct to the interface of the insert 4;

[0070] The third step is to cut the 4-layer composite material prepreg according to the specified shape, and lay it on the preform jig to form a preform, and take it out for use;

[0071] The fourth step is to place the preform in the mold cavity and close the mold;

[0072] The fifth step is to blow gas into the air duct to the predetermined pressure and maintain it, then circulate the heating oil to maintain 140°C to heat the mold and product for 1 hour;

[0073] The sixth step, after the product is solidified, release the gas in the air duct, and circulate the cooling oil to cool down;

[...

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Abstract

The invention relates to a forming mold and a forming process for a composite material product with a complex structure. The forming mold adopts a mold pressing and bag pressing mixed forming method to form the composite material product with the complex structure. The mold comprises an upper mold base, heat insulation plates, an upper mold, an insert, a lower mold, an oil cylinder sliding block mechanism, ejection mechanisms and a lower mold base. The forming process comprises the following steps: a, pretreating the mold and the air pipe; b, laying a composite material preform; c, putting the preform into a mold and laying an air pipe; d, forming a product; and e, demolding the product. A pressurizing auxiliary forming covering part is complex and is provided with an inner buckle and other structures; product demolding is convenient through use of a bag pressure air pipe; meanwhile the mold structure is simplified; heating oil ways are arranged in the upper mold, the insert and the lower mold; the mold and the preform can be rapidly heated through the heating oil ways and the heat insulation plates; the composite preform can be evenly heated through the heating oil ways; and the product forming quality is improved.

Description

technical field [0001] The invention relates to a molding die and a molding process for a product, in particular to a molding die and a molding process for a composite material product with a complex structure, which adopts a mixed molding method of molding and bag pressing. Background technique [0002] Molding is a common process for forming fiber-reinforced plastic composite materials. It has the advantages of high production efficiency, easy automation, high dimensional accuracy, smooth surface, and one-time molding of products. However, the manufacturing of molding molds is complicated, especially with complex structures such as inner buckles The molding die structure of the product is cumbersome and complicated, which increases the manufacturing cost and the demoulding time of the product. [0003] During the molding process of composite materials, heating is usually used to speed up the curing of the product. The heating method is usually electric heating. The advanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/68B29C33/04
CPCB29C70/342B29C70/345B29C70/68B29C33/04
Inventor 苑玲万君沈艳彬
Owner 上海伽材新材料科技有限公司
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