Vacuum perfusion moulding technology method for composite material thick workpiece

Abstract

The invention discloses a vacuum perfusion moulding technology method for a composite material thick workpiece. The vacuum perfusion moulding technology method includes the following steps that (1) a reinforced glass fiber fabric layer is laid on a mould; (2) an isolating membrane with holes and demoulding cloth are laid on the surface of the reinforced glass fiber fabric layer; (3) a guide net is placed on the surface of the isolating membrane; (4) a separation material and a guide pipe are placed on the guide net, and the surface of the guide pipe is covered with guide materials; (5) an air pumping pipe is placed in a system and connected with a vacuum pump, and a vacuum bag membrane is sealed by adopting seal glue; (6) the vacuum pump is used for pumping air to make the interior of the system be negative pressure; and (7) vacuum perfusion is conducted, solidification is conducted to mold, and demoulding is conducted. According to the perfusion moulding technology method, the guide pipe does not make directly contact with a blade root glass fiber structure layer by adopting the separation material, the perfusion efficiency and the quality of finished products can be ensured effectively, and the problem that the lower portion of a flow channel gets white after moulding is solved.

Description

technical field [0001] The invention belongs to the field of vacuum infusion, and in particular relates to a process method for vacuum infusion molding of composite material thick parts. Background technique [0002] At present, one of the mainstream manufacturing processes of composite material components is the vacuum-assisted infusion molding process (Vacuumfusion process). The vacuum-assisted infusion molding process has low input costs, and is easy to process products with complex shapes and large structural parts. It has important applications in industries such as wind blades, ships, aerospace and automobile industries. The current vacuum-assisted infusion molding process is as follows: (1) laying glass fiber reinforced fabric according to the design and planning of the finished product structure. (2) Lay diversion nets, diversion pipes, glue inlet hoses, exhaust pipes and diversion nets on the surface of the reinforced fabric, and connect the exhaust pipes to the v...

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Problems solved by technology

[0005] In order to solve the problem that the roots of large-scale wind power blades are prone to whitening under the flow channel after vacuum infusion molding, the invention proposes a method for vacuum infusion molding of thick composite materials

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