Method for casting and molding spiral rotor of compressor

Abstract

The present invention relates to a method for casting and forming the helical rotor of a compressor, which is realized through the following steps: preparing a first mould, and a helical part mould is axially arranged inside the first mould; a sand mould is prepared by filling the sand pulp inside the first mould, and after the sand pulp is solidified and formed, the sand mould is formed by removing the mould, and the cast-die cavity of the helical part is arranged inside the sand mould; preparing a second mould: the second mould comprises an upper sand box and a lower sand box, and the sand mould is arranged inside the lower sand box, a molding cavity of a first pivot part and a second pivot part are arranged inside the upper sand box to be fixed and integrated with the upper and the lower sand boxes; pouring and forming: liquid cast-piece material is poured into the cast-die cavity and the molding cavity, and a rotor cast piece that is provided with a helical part and with two ends being respectively connected with the first pivot part and the second pivot part is formed by removing the mould after the cast-piece material is formed; the method of the present invention can save a great amount of materials and can save the manufacturing time.

Description

technical field [0001] The invention relates to a compressor rotor casting molding method, in particular to a casting molding method suitable for manufacturing a compressor screw rotor. Background technique [0002] The rotor is the heart of the compressor, and the manufacturing process of the rotor has a deeper impact on the performance, life, and cost of the overall compressor. Among them, the screw rotor is one of the most widely used rotor types at present, and its application range is quite wide, such as cold coal compressors, air compressors, refrigeration compressors and dry compressors. [0003] However, most of the current screw rotor manufacturing methods are carried out by traditional machining methods, that is, the raw metal materials are cut and sawed into metal blocks, and then the metal blocks are subjected to machine tool cutting, turning and other processing steps, so that Complete the important parts of the helical rotor such as the helical part of the hel...

AI Technical Summary

Problems solved by technology

[0004] As can be seen from the foregoing, the traditional helical rotor manufacturing method is not only time-consuming and labor-intensive, but also wastes metal materials, and because it requires a long time and a large number of cutting operations in the processing process, it is easy to cause damage to machine tools or cutting tools, increasing considerable manufacturing cost

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