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Gas Expansion Molding Mold

A forming mold and gas expansion technology, which is applied in the manufacture of composite materials and the field of gas expansion forming molds, can solve the problems of unfavorable composite material manufacturing costs, application conditions and environmental restrictions of melting core molds, and shorten the molding cycle and manufacturing costs. , Reduce the difficulty of the process, shorten the effect of the process

Active Publication Date: 2021-03-09
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a gas expansion molding die, which can solve the technical problems in the prior art that the rubber mold is used to prepare products, which is not conducive to reducing the manufacturing cost of composite materials, and the application conditions and environment are limited when the molten core mold is used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] like Figure 2-3 As shown, the barrel-shaped composite shell was prepared using the hand lay-up process + pressurized form.

[0069] 1) Preparation of raw material preforms, use glass fiber and room temperature epoxy resin to paste product preforms according to the number of layers and structural requirements required by the design;

[0070] 2) Preparation of expansion material fluid, mixing aluminum, hydrochloric acid solution with a mass fraction of 10%, water, and gypsum according to a certain ratio and process requirements, and the mixing time is about 5 minutes;

[0071] 3) The pouring of the material will be as figure 2 The ready-to-use mold shown is cleaned and assembled, with inflatable material poured through the openings, assisted by mechanical vibration;

[0072] 4) Pressurize the core mold and solidify the resin. After the preform is prepared, the mold is closed, and it is controlled to start curing 30 minutes after the expansion material fluid is mixed, ...

Embodiment 2

[0076] like Figure 4-5 As shown, a composite box-shaped part is prepared using a prepreg lay-up + molding format.

[0077]1) Preparation of raw material prefabricated parts, using carbon fiber prepreg to lay out product preformed parts according to the number of layers and structural requirements required by the design;

[0078] 2) Preparation of expansive material fluid, mixing aluminum, 40% sulfuric acid solution by mass fraction, gypsum, water, water reducer, retarder, and cement according to a certain ratio and process requirements, and the mixing time is about 5 minutes;

[0079] 3) The pouring of the material will be as Figure 4-5 The ready-to-use mold shown is cleaned and assembled, with expansion material fluid poured through the openings, assisted by mechanical vibrations;

[0080] 4) Forming pressurization and resin curing of the mandrel. After the preformed part is prepared, the mold is closed, placed on the press, and the temperature starts to rise. The tempera...

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Abstract

The invention provides a gas expansion molding die, which has a mold cavity, and a push plate is arranged in the mold cavity, and the push plate divides the mold cavity into a first cavity and a second cavity. A cavity is provided with an opening. When the mold is used to form a product: the first cavity is still filled with an expansion material fluid, and at this time the opening of the first cavity is in a sealed state, wherein the expansion material fluid will include The reactants, water and hardening components are mixed, and the reactants in the expansion material fluid undergo a chemical reaction to generate gas so that the matrix formed by the reaction of the hardening components and water expands and pushes the push plate to exert pressure on the raw material And molding, and after the molding is finished, the expansion material fluid forms and can destroy the core mold. The mold can solve the technical problems in the prior art that the rubber mold is not conducive to reducing the manufacturing cost of the composite material, and the application conditions and the environment are limited when the melting core mold is used.

Description

technical field [0001] The invention relates to the technical field of composite material manufacturing, in particular to a gas expansion molding die used for composite material manufacturing. Background technique [0002] Fiber-reinforced thermosetting composite material is a commonly used material in the aerospace field. The amount used has become a standard to measure whether the design and manufacture are advanced, whether it has high technology content, and whether the whole system has advantages. It has become an advanced material that designers are vying to adopt. one. However, with the process of lightening the structure and reducing the cost, designers are required to integrate or form the whole parts at one time, so as to reduce the amount of fasteners and adhesive joints and shorten the subsequent processing and assembly processes, which leads to composite The structure of material components is more complex, the technical requirements are higher, and the manufac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/54B29C70/34B29C33/00
CPCB29C33/00B29C70/34B29C70/54
Inventor 毕向军许亚洪路建军刘秀缪伟民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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