Method for molding resin matrix composite material by zero-adhesive-discharge vacuum assisted resin infusion (VARI)

A resin infiltration, vacuum-assisted technology, applied in the field of liquid molding of resin-based composite materials, can solve the problems of high glue content, failure of protective resin function, and inability to protect, so as to improve the fiber volume content and thickness uniformity, and reduce resin penetration. The effect of time and precise control of resin dosage
CN103802331AActive Publication Date: 2014-05-21AVIC COMPOSITES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AVIC COMPOSITES
Publication Date
2014-05-21

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Abstract

The invention belongs to a resin matrix composite material liquid molding technology, and relates to a method for molding a resin matrix composite material by zero-adhesive-discharge vacuum assisted resin infusion (VARI). A glue inlet diversion net (20) and a resin drawing layer (30) are arranged on a fiber-reinforced premolded body (3); the outer surface of the fiber-reinforced premolded body (3) is covered with a micro-ventilation layer (4) and a glue blocking layer (5). According to the method, a resin glue discharge channel is omitted, so that zero adhesive discharge of the VARI molding technology is realized, and the using amount of resin is accurately controlled; the micro-ventilation layer (4) and the glue blocking layer (5) are additionally arranged, so that pressure is evenly transmitted into the fiber-reinforced premolded body (3); furthermore, the excessive gas in the resin and the fiber-reinforced premolded body (3) can be fully discharged, so that the porosity of parts can be reduced, the molding quality and the thickness uniformity of the parts can be improved, and the production cost is remarkably lowered.
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Description

technical field

[0001] The invention belongs to the liquid molding technology of resin-based composite materials, and relates to a method for resin-based composite material formed by vacuum-assisted resin infiltration with zero glue out. Background technique

[0002] Vacuum Assisted Resin Infusion (VARI for short) is a liquid molding manufacturing technology suitable for the integral molding of large composite components. Since the entire process only needs a vacuum of -0.1Mpa, it can be processed in an oven. Complete resin infiltration and curing, no need for a huge investment in autoclave, and can combine stitching, weaving and other technologies to achieve three-dimensional reinforcement of composite components, with the advantages of low manufacturing cost, high molding efficiency, low porosity and good integrity . However, the conventional VARI molding process has the following disadvantages: (1) The conventional VARI process needs to set up one or more resin outlet ch...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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