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

Abstract

The invention provides an injection molding process machining method for a large composite material reinforced thin-wall support structure. The method comprises the following steps that an injection molding machine heats raw materials to enable the raw materials to be in a molten state; a mold is closed under the action of high pressure, the injection molding machine injects the molten materials into a pouring system, wherein a cooling system is always in a working state while the mold is closed; after the injection action of the injection molding machine is completed, the mold is opened aftermaintaining pressure for a period of time; and an ejection system ejects out a workpiece. According to the method, the process of directly carrying out injection molding through the mold when the thermoplastic materials are in a viscous flow state is adopted, the product performance requirement is equivalent to that of a metal product, the production energy consumption is reduced, the productionoperation environment is excellent, mass production in a short time can be realized, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of thin-walled castings, in particular to an injection molding processing method for a large-scale composite material reinforced thin-walled bracket 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. Short-fiber toughened thermoplastic composite materials are used to replace 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] Publication No. CN111203514A "A Method for Precision Casting of High-temperature Alloy Complex Thin-walled Castings" discloses a method for precision casting of high-temperature alloy complex thin-walled castings. By coa...

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Problems solved by technology

[0004] At present, there are mainly the following problems in the production of large thin-walled parts by casting method: first, the fluidity of the metal is poor, and the back shrinkage hole will be formed due to the rapid temperature drop during the casting filling process, which will form a crack source and affect the performance of the product; The production environment is extremely harsh, and it is easy to cause occupational diseases to workers and masters, such as: active tuberculosis, chronic obstructive pulmonary disease, chronic interstitial lung disease, diseases with lung function damage, etc. The pollution is serious; the fourth is that the mold processing, maintenance, operation, quality control, and labor costs in the production process are very high, so the overall cost of manufacturing a product is extremely high

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