Method for pressurizing and molding composite part by using thermal expansion of silicone rubber

A composite material and pressure forming technology, which is applied in the field of silicone rubber thermal expansion and pressure forming composite parts, can solve the problems of poor practicability and complicated calculations

Inactive Publication Date: 2012-10-10
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when these methods are used to design the molding die, the calculation is very complicated and the practicability is poor.

Method used

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  • Method for pressurizing and molding composite part by using thermal expansion of silicone rubber
  • Method for pressurizing and molding composite part by using thermal expansion of silicone rubber
  • Method for pressurizing and molding composite part by using thermal expansion of silicone rubber

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Embodiment Construction

[0026] The technical solution of the present invention will be described in further detail below in conjunction with accompanying drawings and examples of implementation:

[0027] See attached figure 1 As shown, the product is a high-precision laminate of composite materials, and the airfoil and web parts are carbon fiber prepregs of different thicknesses. The requirements for shape accuracy and porosity are relatively high, the molding and curing pressure is 0.5Mpa, and the molding and curing temperature is 180°C. The mold material is Q235 low-carbon steel, the forming mold 1 adopts the product shape positioning, and the inside is a combination of mold loose block 2, metal core mold 3 and silicon rubber core mold 4, which are fixed and fastened with bolts 5. By raising the temperature, the molding pressure is provided from the inside by the thermal expansion of the silicone rubber.

[0028] Its specific process steps are:

[0029] 1. Lay the prepreg of the composite materi...

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Abstract

The invention provides a method for pressurizing and molding a composite part by using thermal expansion of silicon rubber, which applies the relations among product thickness, process gaps and thickness of a silicon rubber layer to a molding die of the composite part, and realizes molding and curing of the composite product by heating of an autoclave and a curing furnace and expansion and pressurization of the silicon rubber. Compared with the prior art, the method is suitable for different composite parts and different die materials, simultaneously meets the technical requirements of the geometric dimension of the composite part, the porosity of a laminate part, expansion pressure of the silicon rubber and the like, simplifies arithmetical operation, and contributes to designing of various molding dies of composite laminate parts, thus has extremely practical value.

Description

technical field [0001] The invention relates to a method for molding composite material parts by thermal expansion and pressure of silicone rubber, which belongs to the technical field of composite material molding. Background technique [0002] The molding temperature and pressure of composite parts are provided by tooling and equipment. For composite structural parts that require high shape accuracy, complex structure, and high porosity, on the premise of accurate positioning of the shape, the high body expansion characteristics of silicone rubber are used to heat up the silicone rubber mandrel to thermally expand the closure rigidity. The composite material prepreg in the female mold is pressurized, so that it can be solidified and formed under the specified temperature and pressure. This method relies on the thermal expansion of the silicone rubber mandrel to generate pressure without external pressure, which can overcome the disadvantage that the pressure of the vacuum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C51/10B29C51/46
Inventor 扈心健
Owner HARBIN
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