Compression molding process machining method for large composite reinforced thin-wall support structure

Abstract

The invention provides a compression molding process machining method for a large composite reinforced thin-wall support structure. The method comprises the following steps that a mold is installed onan oil press; the mold is preheated, and is opened to fill a material after reaching preset temperature; after material filling is completed, the an upper mold assembly and a lower mold assembly aresemi-closed, and heating is continued until the material is in a molten state; after heat preservation is conducted for a certain period of time and the material is completely molten, the upper mold assembly and the lower mold assembly are assembled, and heating is stopped; and a product is extracted after pressure is maintained for a period of time. According to the method, the adopted mold is simple in structure, the production cost is low, and the period is short. The method is suitable for producing various large reinforced thin-wall high-strength fiber composites in complex shapes, the produced product can replace metal parts applied to some occasions, the weight is greatly reduced, and the production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of thin-walled castings, in particular to a compression molding processing method for a large-scale composite material reinforced thin-walled support structure. Background technique [0002] The large-scale composite material reinforced thin-wall support structure is suitable for large-scale equipment such as aviation, spaceflight and special vehicles that are subjected to complex loads such as high-frequency vibrations. The use of short fiber toughened thermoplastic composite materials replaces traditional metal materials such as aluminum alloys, magnesium alloys, and titanium alloys, which greatly reduces weight while ensuring high strength, and greatly reduces manufacturing costs. [0003] The announcement number is CN210910944U "an injection mold for producing large-scale thin-walled products" discloses a kind of injection mold for producing large-scale thin-walled products, which solves the problems of ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are mainly the following problems in the production of fiber-reinforced composite materials by injection molding: First, the fluidity of fiber-reinforced composite materials is poor, and there will be internal holes during the injection molding filling process, forming The source of cracks affects the performance of the product; second, only products with simple shapes can be produced, and products with complex shapes cannot be formed at one time, and follow-up machining is required; third, the structure of the mold is complex, and the cost of production and maintenance is high. The processing cycle is also longer; Fourth, for the injection molding production of large parts, large-scale injection molding machines are required, and large-scale injection molding machines are generally difficult for enterprises to afford the high cost, so it is difficult to see some enterprises producing large-scale thin-walled products. This has become a problem for the industry

Images