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Vacuum forming technique for sandwich structure piece of composite material of fiberglass-reinforced plastics

A technology of composite materials and sandwich structures, applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve problems such as surface roughness, air bubbles, internal quality, and unsatisfactory geometric thickness errors, etc., to achieve simplification The effect of forming device

Active Publication Date: 2007-02-21
上海之合玻璃钢有限公司
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  • Abstract
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Problems solved by technology

The products produced by this method are not ideal in terms of internal quality, geometric dimensions, especially thickness errors, and are prone to appearance quality problems such as delamination, bubbles, and rough surfaces.

Method used

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  • Vacuum forming technique for sandwich structure piece of composite material of fiberglass-reinforced plastics

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Embodiment Construction

[0017] see figure 1 , the formed workpiece is a unit structure of a radome, consisting of an outer layer 3 of a glass fiber reinforced plastic laminate, an inner layer 5 of a glass fiber reinforced plastic laminate, and a foamed plastic or honeycomb core layer 4, the outer surface of which is coated with a waterproof gelcoat resin. The peripheral joint portion 11 of the structural member is directly compounded by the inner and outer glass fiber reinforced plastic laminates.

[0018] The fabrication process of the structure is as follows (see figure 1 ):

[0019] (1) Making a forming mold: the forming mold is divided into an upper mold 1 and a lower mold 2, the mold must have sufficient rigidity, and a number of micro-holes are arranged on the upper mold 1 for the needs of exhaust in the vacuum process, wherein the upper mold The inner cavity of 1 is the inner molding surface of the composite sandwich structure, and the inner cavity of the lower mold 2 is the outer molding su...

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Abstract

A composite glass fiber reinforced plastics material with sandwich structure is composed of an external layer made of glass fiber reinforced plastics and coated by water-proof resin, an internal layer made of glass fiber reinforced plastics, and a core layer with cellular structure or made of foam plastics. Its vacuum forming technology includes such steps as respectively preparing mould, external layer, internal layer and core layer, molding, and vacuum solidifying.

Description

technical field [0001] The invention relates to a vacuum forming process for a glass fiber reinforced plastic composite sandwich structure. Background technique [0002] The existing molding process of the glass fiber reinforced plastic composite sandwich structure generally adopts the single-mode soft air bag method, that is, a positive pressure soft air bag is provided on the single mold. The products produced by this method are not ideal in terms of intrinsic quality, geometric dimensions, especially thickness error and other indicators, and are prone to appearance quality problems such as delamination, bubbles, and surface roughness. Contents of the invention [0003] The purpose of the present invention is to provide a vacuum forming process for the FRP composite sandwich structure so as to improve the internal quality and appearance quality of the FRP composite sandwich structure. [0004] The glass fiber reinforced plastic composite sandwich structure of the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/44B32B27/00
Inventor 孙志强陆贤巽彭根培蒋汉生
Owner 上海之合玻璃钢有限公司
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