Method for producing sealing rubber air-bag male die and resin transfer molding method therefor

A technology for sealing rubber and its manufacturing method, which is applied in the manufacture of sealing rubber airbag positive molds and the field of resin transfer molding of complex structural composite material parts, achieving the effects of good industrial applicability, simple process, and reduced manufacturing costs

Inactive Publication Date: 2006-12-27
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the technical problem to be solved by the present invention is to design a method for manufacturing a sealing rubber airbag male mold and a new method for resin transfer molding. The manufacturing method of the sealing rubber airbag male mold has the advantages of simple mold manufacturing , low cost, especially suitable for various complex structures and / or large-scale composite material products; the new method of resin transfer molding, with the help of the manufacturing method of the sealing rubber airbag male mold, makes complex Structural composite parts are easy to demould after curing, and have the advantages of simple process, no bonding with composite parts, and excellent product quality.

Method used

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Embodiment 1

[0019] Manufacturing method of sealing rubber airbag positive mold of large hemispherical composite material parts and new method of RTM forming (see figure 2 ).

[0020] (1) Manufacture the positive mold of the sealed rubber airbag: first, according to the shape requirements of the composite material part, use metal materials to manufacture two symmetrical mold blocks 1 and 1' larger than 1 / 4 spherical shape, and a flat cover plate mold block 6, and three molds Blocks 1, 1' and 6 together form the female mold. Make the hemispherical sealing rubber airbag positive mold 3 of band gas nozzle 4 with rubber sheet material again, make it have deformability and sealing.

[0021] The manufacturing method of the large hemispherical male mold 3 is as follows: first lay the filling material in the metal female modules 1 and 1', the filling material in the embodiment adopts glass fiber fabric, and the laying thickness is not less than the thickness of the composite material part 2 Dim...

Embodiment 2

[0024] The sealing rubber air bag positive mold manufacturing method and RTM molding new method of the tapered composite material parts with reinforcing ribs (see image 3 ).

[0025] (1) Manufacture the male mold of the sealing rubber airbag: the manufacturing method of the male mold 3 is basically the same as in embodiment 1. The difference is that there are two metal female molds, one is a female module 1 similar to a trapezoidal cross-section; the other is also a flat cover plate female module 6; and the rubber sheets used are three pieces, and the overlapping length of the rubber sheets When the oven temperature is designed to be 160°C, keep the pressure at 0.2Mpa for 20 minutes to vulcanize the rubber. In addition, the filling material should be well reinforced.

[0026] (2) RTM new method for manufacturing composite parts: place the composite material preform 2 in the metal female module 1, and then put the male mold 3, so that the concave part and the protruding part...

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Abstract

Disclosed are a preparation method for sealed rubber air bag positive mold and a novel method for resin delivery mold formation, and the former comprises manufacturing a negative mold using metal material, putting filling material having a thickness equal or more than composite material product into the negative mold, spreading two or more than two pieces of rubber sheets overlapping each other for 20-30mm, one of the rubber sheets having a air faucet, sealing and fixing the negative mold; filling compressed air into the air faucet projecting out of the negative mold, sticking the rubber sheets behind the filling material, putting them into the bake oven to heat them up at a temperature of 150-160 DEG.C and holding a air pressure at 0.2-0.3Mpa for 10-20min, to make the sheet overlapping binding and sealed; cooling down, detaching the negative mold, and taking seal rubber air bag positive mold out. The latter method comprises further using the positive mold and metal mold manufactured by the former method, embedding a composite material precast product, filling compressed air into the positive mold, injecting resin, curing, degassing and demoulding, and obtaining the composite material.

Description

technical field [0001] The present invention relates to a composite material resin molding technology, especially a manufacturing method of a sealed rubber airbag positive mold and a new method for resin transfer molding of complex structural composite material parts. The international patent main classification number is intended to be Int. Cl. B29C70 / 00. Background technique [0002] Resin Transfer Molding (RTM) is a molding technique for composite materials. Composite parts produced by this process technology have the characteristics of local reinforcement, smooth on both sides, accurate size, and environmental friendliness, so they are more and more widely used in aerospace, transportation, electrical appliances and other fields. In the traditional RTM process, due to the use of metal mold materials, when manufacturing composite parts with complex structures, many structures such as spherical or large hemispherical, deformed cavities with small openings, and embedded pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/40B29C70/48
Inventor 吴晓青李嘉禄
Owner TIANJIN POLYTECHNIC UNIV
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