A liquid molding process resin automatic injection system and its process

Abstract

The invention belongs to the field of process manufacturing, and relates to an automated injection system for liquid forming process resin and a process of the automated injection system. The system detects a resin flowing leading peak of a composite material liquid forming process by a reflective light intensity modulated optical fiber sensor, and a signal is fed back to a controller; the controller controls adhesive injection ports and adhesive overflow ports in different positions of fiber preformed bodies to be opened or closed according to the resin flowing leading peak information, and further the ordered automated injection of the resin in the composite material liquid forming process is realized. The invention has the beneficial effects that since the technical solution mentioned above is adopted, particularly, specific to large-scale composite material products with complex structures, it can be ensured that the rein totally infiltrates the fiber preformed bodies, defects such as dry spots and bubbles are avoided, product quality is ensured, meanwhile, adhesive injection efficiency is improved and productivity is increased.

Description

technical field [0001] The invention belongs to the field of process manufacturing, and relates to a liquid molding process resin automatic injection system and a process thereof. Background technique [0002] The liquid molding process can reduce the capital investment of molding equipment and molds. Studies have shown that for the manufacturing surface area of ​​80m2 2 -130m 2 The cost of curing equipment (curing furnace cost) of the liquid molding process is only 1 / 10-1 / 7 of the approximate size of the autoclave, and the cost of the curing process in the autoclave molding process accounts for 10% of the cost of aerospace composite materials manufacturing About 13% of the total cost. In addition, the liquid molding process can shorten the manufacturing cycle and reduce energy consumption, the price of the dry fiber and resin used is also lower than that of prepreg, and it is convenient to store. The liquid forming process is widely used in aerospace, automotive, marine,...

AI Technical Summary

Problems solved by technology

The controller controls the opening or closing of the injection port and the overflow port at different positions of the fiber preform according to the resin flow front information, and then realizes the orderly and automatic injection of the resin in the liquid molding process of the composite material. The beneficial effect of the present invention is that due to the use of The above-mentioned technical solution, especially for large complex structural composite parts, can ensure that the resin completely infiltrates the fiber preform, avoids defects such as dry spots and air bubbles, ensures product quality, and at the same time improves the injection efficiency and productivity

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