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Vacuum bag forming process for producing double-sided smooth composite material product

A composite material and molding process technology, applied in the field of vacuum bag forming technology, can solve the problems of high cost, low molding process efficiency, and inability to prepare structural products, etc., and achieve the effect of low mold cost and uniform force

Inactive Publication Date: 2018-01-19
ZHEJIANG GBF BASALT FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lamination process can only pressurize the upper and lower sides, and cannot produce products with complex structures; the molding process has low efficiency and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1. A vacuum bag forming process for making a double-sided smooth composite material product. The steps are as follows:

[0017] ① Prepare two flat molds, one is a male mold with a larger size, and the other is a female mold with the same size as the sandwich panel. Adhere transparent tape around the operating surfaces of the male and female molds, and then place them on the corresponding operating surfaces Evenly spread the release agent; ②, spread the prepreg on the male mold; ③, spread the female mold above the ply; ④, spread the air felt above the female mold; ⑤, tear off the transparent tape, and paste the sealing tape to At the place where the scotch tape is torn off, cut the suction pipe to form the No. 1 suction pipe. The No. 1 suction pipe is connected with the draft tube and at least 50cm is left outside the mold. At the same time, the No. Adhesive strip connection; ⑥, paste the vacuum bag film on the sealing tape to form a closed system; ⑦, cut the suctio...

Embodiment 2

[0019] Embodiment 2. Compared with Embodiment 1, this embodiment differs in that in step ②, the mixture of epoxy adhesive film and fiber fabric is laid, and the others are the same.

Embodiment 3

[0020] Example 3. Compared with Example 1, this example differs in that step ② is to lay up the fiber fabric by hand lay-up, and the baking temperature is 60-80°C, and the others are the same.

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PUM

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Abstract

The invention discloses a vacuum bag forming process for producing a double-sided smooth composite material product. The vacuum bag forming process comprises the following steps that (1) a male mold and a female mold are prepared; (2) layer laying is conducted; (3) the female mold is laid; (4) a breathable felt is laid; (5) sealing strips are pasted; (6) a vacuum bag film is sealed; (7) a pipelineis connected; (8) vacuumizing is conducted, and the vacuum degree is tested; (9) product solidification is conducted, and vacuumizing is conducted simultaneously; and (10) demolding is conducted, andthe double-sided smooth product is obtained. The vacuum bag forming process for producing the double-sided smooth composite material product adopts the vacuum bag forming process and is different from laminating and mold pressing process, an expensive pressing machine is not required to be used, the mold cost is also very low, combined with a drying oven, more than one batch of products can be produced at one time, and stress on all parts of the product is even, and a complex structure can be designed; and meanwhile, demolding cloth is replaced by a mold coated with a release agent, and the double-sided smooth composite product can be produced.

Description

Technical field [0001] The invention relates to the technical field of composite material molding technology, in particular to a vacuum bag molding process for manufacturing a double-sided smooth composite material product. Background technique [0002] The vacuum bag molding process is a molding process in which the product is sealed between the mold and the vacuum bag, and the product is pressurized by vacuuming, so that the product is more compact and has better mechanical properties. The product prepared by this method has a high fiber content, and is uniformly pressurized, which can effectively reduce air bubbles, so it has better mechanical properties. In addition, it can also be used to form complex and large parts. If the curing process continues Vacuuming can exhaust the gas generated during the curing process. [0003] The vacuum bag forming process is divided into wet and dry methods. The wet process is roughly the same as the dry process. The difference is that the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/44
Inventor 胡朝康吴海强王国才黄兴明许加阳王会忠胡显奇
Owner ZHEJIANG GBF BASALT FIBER