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Forming method of carbon fiber composite material grille

A composite material and molding method technology, used in household components, household appliances, other household appliances, etc., can solve problems such as excessive straightness of grille products, difficulty in demoulding, and cost reduction, and simplify the difficulty and variety of demoulding. Rich, easy pouring effects

Inactive Publication Date: 2017-06-13
HENGSHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a liquid forming method for a composite material grid, which meets the requirements of the grid cavity as an aerodynamic surface, and solves the problem of out-of-poor straightness and difficult demoulding of the grid products formed by the existing method problems while reducing costs

Method used

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  • Forming method of carbon fiber composite material grille
  • Forming method of carbon fiber composite material grille

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: as figure 2 As shown, it is a composite material grid part molded by the present invention. The grid is composed of 80 grids with different sizes and specifications; Molding, demoulding is difficult, and the process is complicated; the dimensional accuracy of the product cannot be guaranteed when it is formed with a silicone rubber core mold.

[0038] The forming method of the carbon fiber composite grid of the present invention specifically comprises the following steps:

[0039] (1) Mandrel molding: firstly, the solidification temperature of the selected resin is 80°C, and the Tg is 123°C, so a low-melting point alloy with a melting point of 90°C is selected; the casting method is adopted, specifically: the mandrel mold and the gate are preformed Heat to 95°C, heat to 105°C after melting the low-melting point alloy, stir evenly, then slowly pour the melt into the mold along the gate until the gate is filled; then cool, demould, and cut off the gate wit...

Embodiment 2

[0046] Embodiment 2: The forming method of the carbon fiber composite grid of the present invention specifically comprises the following steps:

[0047](1) Mandrel molding: According to the use temperature of the product, select high-temperature curing epoxy resin, the curing temperature is 130°C, the post-processing temperature is 170°C, and the low-melting point alloy with a melting point of 145°C is selected, and directly processed by CNC machine tools Core mold; the height of the gate is at least 3cm higher than the upper surface of the core mold, and the position of the gate corresponds to the non-forming surface of the core mold;

[0048] (2) Paving of carbon fiber fabric: Lay the cut fabric on the mandrel, and use a special adhesive to assist the pasting; the vertical and horizontal ribs are paved on the flat plate for use;

[0049] (3) Mold closing: Assemble the mandrel prefabricated body, insert a piece of horizontal rib every time a mandrel is placed on the positioni...

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Abstract

The invention relates to a forming method of a carbon fiber composite material grille, the forming method of the carbon fiber composite material grille comprises the following steps: (1) core mold molding; (2) carbon fiber fabric paving; (3) mold assembly; (4) glue injection; (5) curing; (6) mold release, and mold core melting; (7) processing; on the basis of the existing method, the contradiction between the surface quality and demoulding difficulty is solved, the use requirements of pneumatic surface can be met; a low melting point alloy core mold used in the method can be repeatedly used, mold cost can be reduced, a RTM process is used for production, and the product is high in surface smooth degree, less in processing amount, and low in manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of a composite material forming method, in particular to a forming method of a carbon fiber composite material grid. Background technique [0002] Carbon fiber composite materials have the advantages of designability, high specific strength, specific modulus, corrosion resistance, and good fatigue resistance. They are more and more used in aerospace, rail transit, ships, and sports. heavy effect. [0003] Grilles can be used to control the direction of airflow, and there is an urgent need for weight reduction. For composite grids with complex curvature, traditional steel or aluminum mandrels are difficult to demould during the manufacturing process, and forced demoulding can damage the parts. At present, silicone rubber mandrel is commonly used to solve the problem, but because the soft film is closely attached to the fabric during the thermal expansion process, the surface of the product will show the uni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36B29C33/38B29L31/00
CPCB29C33/3842B29C70/36B29L2031/737B29C33/52
Inventor 刘欢刘娇曹宇陈永乐於永红李泽英谭素宝
Owner HENGSHEN
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