Vacuum infusion molding process for compound material and flow guide net thereof

Abstract

The invention relates to a vacuum infusion molding process for a compound material and a flow guide net thereof. The vacuum infusion molding process for the compound material comprises the following steps: paving the flow guide net on the surface of a product in a die, and arranging a flow guide tube on the flow guide net, wherein the flow guide net is arranged according to the structure of the product; blending 1-2kg of plastic color master batch particles with each 100kg of high-density polyethylene (HDPE) plastic particles adopted by the flow guide net; adding to a hopper; entering an extruding machine through an automatic feeding device; heating at the position of a machine barrel of the extruding machine to fuse the HDPE plastic particles and the plastic color master batch particles; then, extruding by an extruding screw of the extruding machine; and finally, extruding by a die head of the extruding machine after heating is performed by the five section of a machine head. Molded meshes are rhombic small blocks in shape; at least one layer of vacuum bag is buckled above the flow guide net and the flow guide pipe; the vacuum bag and the die are sealed; and the flow guide pipe penetrates the vacuum bag, and the penetrating part is sealed, thereby, the phenomenon that the product defect is caused because resin infusion is too slow or incomplete cannot occur.

Description

【Technical field】 [0001] The invention relates to a composite material vacuum infusion molding process, in particular to the infusion molding process which can significantly improve the fluidity of resin glue in the production process of vacuum infusion using a combination mold of a hard mold and a soft mold. [0002] The invention also relates to a diversion net, in particular to a diversion net capable of realizing the uniform distribution of the infiltration speed of the resin glue in the plane direction and the thickness direction. 【Background technique】 [0003] Composite material vacuum infusion molding is one of the important methods of vacuum-assisted resin transfer molding process. It uses vacuum negative pressure to inject resin into and soak the reinforcement material, which is suitable for products with high quality requirements and large size. Compared with the traditional hot pressing process, it has the outstanding characteristics of low mold cost, resin curin...

AI Technical Summary

Problems solved by technology

However, the defect of the existing process is that the resin flows slowly and the immersion is uneven, which leads to the premature curing of the resin, defects in the manufactured product, and a decrease in strength.

Further, there will be resin outflanking, which will lead to local defects such as dry fibers and white spots on the product or too long diversion time, which will affect production efficiency

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