Manufacturing method of rotating shuttle plate

A manufacturing method and a technology of a rotary hook moon ring, which are applied in the field of sewing machine accessories, can solve the problems of complex structure, poor consistency of the rotary hook moon ring, large heat generation, etc., so as to overcome the low utilization rate, reduce production costs, and have good consistency. Effect

Inactive Publication Date: 2017-06-20
ZHEJIANG YIHUO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 requirem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Embodiment 1 Manufacturing method of rotary shuttle moon ring

[0021] (1) Mix iron-nickel powder (Fe2%Ni0.2%C) with an organic binder (the amount of the organic binder is 9% of the weight of the iron-nickel powder), and then put the uniformly mixed material into the target moon circle In the shape of the mold;

[0022] (2) Injection molding to obtain the blank of the rotary shuttle moon circle; the injection temperature is 190°C, the pressure is 90MPa, and the mold temperature is 120°C;

[0023] (3) Catalyzed degreasing of the rotary shuttle moon ring blank to obtain a degreasing part; the degreasing temperature is 120°C, and the degreasing time is 2.5 hours;

[0024] (4) Sinter the degreased parts, wherein the sintering temperature is 1250-1300°C; the sintering adopts the gas protection sintering method, the sintering vacuum degree is 0.005MPa, and the sintering protection atmosphere is argon.

[0025] (5) After correcting the sintered part, the product of the rotar...

Example Embodiment

[0026] Embodiment 2 The manufacturing method of the rotary shuttle moon ring

[0027] (1) Mix iron-nickel powder (Fe2%Ni0.1%C) with an organic binder (the amount of the organic binder is 12% of the weight of the iron-nickel powder), and then put the uniformly mixed material into the target moon circle In the shape of the mold;

[0028] (2) Injection molding to obtain the blank of the rotary shuttle moon ring; the injection temperature is 180°C, the pressure is 100MPa, and the mold temperature is 115°C;

[0029] (3) Catalyzed degreasing of the rotary shuttle moon ring blank to obtain a degreasing part; the degreasing temperature is 115°C, and the degreasing time is 3 hours;

[0030] (4) Sinter the degreased parts, wherein the sintering temperature is 1250-1300°C; the sintering adopts the gas protection sintering method, the sintering vacuum degree is 0.01MPa, and the sintering protection atmosphere is helium.

[0031] (5) After correcting the sintered part, the product of the...

Example Embodiment

[0032] Embodiment 3 The manufacturing method of the rotary shuttle moon ring

[0033] (1) Mix iron-nickel powder (Fe2%Ni0.35%C) with an organic binder (the amount of the organic binder is 8% of the weight of the iron-nickel powder), and then put the uniformly mixed material into the target moon circle In the shape of the mold;

[0034] (2) Injection molding to obtain the blank of the rotary shuttle moon circle; the injection temperature is 200°C, the pressure is 80MPa, and the mold temperature is 125°C;

[0035] (3) Catalyzed degreasing of the rotary shuttle moon circle blank to obtain a degreasing part; the degreasing temperature is 125°C, and the degreasing time is 2 hours;

[0036] (4) Sinter the degreased parts, wherein the sintering temperature is 1250-1300°C; the sintering adopts the gas protection sintering method, the sintering vacuum is 0.008MPa, and the sintering protection atmosphere is argon.

[0037] (5) After correcting the sintered part, the product of the rot...

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PUM

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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 ...

Claims

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Application Information

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IPC IPC(8): B22F3/22B22F3/10
CPCB22F3/227B22F3/10
Inventor 黎正科梁良华吴国凯张怀龙姜志瑜
Owner ZHEJIANG YIHUO TECH
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