Manufacturing method of rotating shuttle plate

Abstract

The invention relates to sewing machine parts, in particular to a manufacturing method of a rotating shuttle plate. The manufacturing method comprises the following steps that (1) iron and nickel powder is mixed with organic binders, and then the evenly-mixed materials are put into a mold in a target shape; (2) a rotating shuttle plate blank is obtained by injection molding, wherein the injection temperature is 170-210 DEG C, the pressure is 60-120 MPa, and the mold temperature is 110-130 DEG C; (3) a degreased member is obtained by conducting catalytic degreasing on the rotating shuttle plate, wherein the degreasing temperature is 110-130 DEG C and the degreasing time is 0.5-5 hours; (4) the degreased member is sintered, wherein the sintering temperature is 1200-1400 DEG C; (5) the rotating shuttle plate product is obtained after a sintered member is corrected. According to the manufacturing method of the rotating shuttle plate, the rotating shuttle plate has the advantages of good consistency, high precision, high strength and high wear resistance.

Description

technical field [0001] The invention relates to sewing machine accessories, in particular to a method for manufacturing a rotary hook moon ring. Background technique [0002] The moon ring is one of the important parts of the rotary hook of the sewing machine. The inner shuttle, the outer shuttle and the moon ring are assembled to form a rotary hook. Because the hardness of the moon ring is relatively high, its processed shape is peculiar. High-speed friction, so as long as the shape deviates, it will generate a lot of heat or produce an excessive gap, which will affect the quality and efficiency of work. Due to the small size and complex structure of this part, the requirements for the degree of manufacturing refinement are relatively high. The existing rotary hook rings are usually produced by mechanical processing, but the manufacturing process is cumbersome, the production efficiency of the mechanical processing method is low, it cannot be produced on a large scale and ...

AI Technical Summary

Problems solved by technology

[0002] The moon ring is one of the important parts of the rotary hook of the sewing machine. The inner shuttle, the outer shuttle and the moon ring are assembled to form a rotary hook. Because the hardness of the moon ring is relatively high, its processed shape is peculiar. High-speed friction, so as long as the shape deviates, it will generate a lot of heat or produce an excessive gap, which will affect the quality and efficiency of work

Due to the small size and complex structure of this part, the requirements for the degree of manufacturing refinement are relatively high

The existing rotary hook rings are usually produced by mechanical processing, but the manufacturing process is cumbersome, the production efficiency of the mechanical processing method is low, it cannot be produced on a large scale and at low cost, and the consistency of the rotary shuttle rings produced by the existing mechanical methods is poor, and it is easy to During use, there will be problems with large heat generation or excessive gaps