Fiberglass/PP composite fiber cloth assisting resin transfer molding (RTM) process method and molding mold

Abstract

The invention relates to a fiberglass / PP composite fiber cloth assisting resin transfer molding (RTM) process method and a molding mold. The adopted mold comprises a lower mold, foam, a sealing rubberstrip, a glue injection opening, an upper mold and a vacuumizing opening. In a process, fiberglass and PP material are woven into composite fiber cloth according to required gram weight first, then needed carbon fibers or fiberglass cloth are / is laid on the surface of a mold cavity, then the fiberglass / PP composite fiber cloth is laid, the foam processed through computer numerical control (CNC) is put in, and then according to symmetrical laminates, fiberglass / PP composite fiber cloth, carbon fibers or fiberglass cloth are laid. Finally, mold assembly, vacuumizing and resin injection are conducted, after product solidification, the molding mold is opened, and a product is taken. According to the fiberglass / PP composite fiber cloth assisting resin transfer molding (RTM) process method andthe molding mold, the fiberglass / PP composite fiber cloth is adopted, PP felt and the foam are attached during material laying, the PP felt is fluffy, thus channels are provided for resin flowing, theproblem of uneven resin flowing on the surface of the foam is solved, the foam does not need slotting or punching, and machining cost of the foam is lowered greatly.

Description

technical field [0001] The invention relates to a forming process and a forming die, in particular to a glass fiber / PP composite fiber cloth-assisted RTM forming process and forming die which can reduce product cost and product weight. Background technique [0002] In the past, when RTM formed "sandwich" structure composite products, the size of the blank and foam was slightly smaller than the size of the mold cavity, and the surface of the foam needed to be grooved and perforated to facilitate resin flow. If the size of the blank is not well controlled, it is easy to cause uneven resin flow, and after molding, there will be partial defective products on the surface of the product that are not infiltrated by resin, resulting in scrap or poor appearance, and need to be painted. The qualified rate of the product is not high, the product processing cycle is long, the production cost is high, and the spray paint causes great environmental pollution. The patented molding technol...

AI Technical Summary

Problems solved by technology

If the size of the blank is not well controlled, it is easy to cause uneven resin flow. After molding, there will be some defective products on the surface of the product that are not infiltrated by resin, resulting in scrap or poor appearance, and need to be painted.

The pass rate of products is not high, the product processing cycle is long, the production cost is high, and the spraying paint has great environmental pollution

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