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A method for manufacturing rotary hook by using flow warm pressing forming method

A technology of flow temperature pressing and forming method, which is applied in the direction of textiles and papermaking, sewing machine ring mechanism, sewing machine components, etc. Low material utilization rate and other issues, to achieve the effect of good sintering shrinkage consistency, high metal material utilization rate, and elimination of component segregation

Inactive Publication Date: 2014-10-08
ZHEJIANG YIHUO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The mechanical processing method cannot achieve large-scale and low-cost production, and the utilization rate of metal materials in the mechanical processing method is low. The injection molding method is used for production due to the fine particle size of the raw materials, high prices, and high product costs, and the injection molding process uses many additives. Dimensional accuracy is poor

Method used

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  • A method for manufacturing rotary hook by using flow warm pressing forming method
  • A method for manufacturing rotary hook by using flow warm pressing forming method
  • A method for manufacturing rotary hook by using flow warm pressing forming method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] 1. Polyethylene glycol (PEG), polyaldehyde and stearic acid are used as adhesives, and the addition amount is 1~5%. Add nano-fine powder as activated sintering agent, the particle size of powder ranges from 2 to 80 microns, after mixing and granulating, it is used as a raw material for flowing warm pressing molding.

[0037] 2. Carry out flow warm-pressing molding at a temperature range of 60~200°C, the mold temperature is 40~120°C, the forming mold is a combined detachable mold, and the inner cavity has the shape of the final product.

[0038] 3. Sintering the fluidized warm-pressed powder blank at 800-1300°C under vacuum or a reducing protective atmosphere to obtain the special-shaped blank of the present invention.

[0039] 4. Carry out necessary inspections and carry out plastic surgery on the micro deformation.

[0040] 5. Carry out micro-machining on plastic parts according to specific needs to meet the differentiated needs of different groups.

example 2

[0042] 1. Use polyethylene wax, paraffin wax, polyamide, and stearic acid as adhesives, and the addition amount is 1~5%. Add nano-fine powder as activated sintering agent, the particle size of powder ranges from 2 to 80 microns, after mixing and granulating, it is used as a raw material for flowing warm pressing molding.

[0043] 2. Carry out flow warm pressing molding at a temperature range of 60~200°C, and the mold temperature is 40~100°C. The combined detachable mold is adopted, and the inner cavity has the appearance of the final product.

[0044] 3. Sintering the fluidized warm-pressed powder blank at 800-1300°C under vacuum or a reducing protective atmosphere to obtain the special-shaped blank of the present invention.

[0045] 4. Carry out necessary inspections and carry out plastic surgery on the micro deformation.

[0046] According to specific needs, the plastic parts are micro-machined to meet the differentiated needs of different groups.

example 3

[0048] 1. Use polyethylene wax, palm wax, and stearic acid as adhesives, adding 1-5%. Add nano-fine powder as activated sintering agent, the particle size of powder ranges from 2 to 80 microns, after mixing and granulating, it is used as a raw material for flowing warm pressing molding.

[0049] 2. Carry out flow and warm pressing molding at a temperature range of 60~180°C, and the mold temperature is 40~160°C. The combined detachable mold is adopted, and the inner cavity has the appearance of the final product.

[0050] 3. Sintering the fluidized warm-pressed powder blank at 800-1300°C under vacuum or a reducing protective atmosphere to obtain the special-shaped blank of the present invention.

[0051] 4. Carry out necessary inspections and carry out plastic surgery on the micro deformation.

[0052] 5. Carry out micro-machining on plastic parts according to specific needs to meet the differentiated needs of different groups.

[0053] The sintering furnace used for sinteri...

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Abstract

The invention discloses a method for manufacturing a rotating shuttle through a warm flow compaction forming method. The rotating shuttle adopts the following alloy material: Fe2NiMo, FeCrMo or FeCr; and the manufacturing method of the rotating shuttle comprises the following steps: firstly, adopting an atomization method to produce raw material alloy powder, secondly, adding raw material alloy nanometer fine powder and adhesive containing surface active agent and plasticizer into the raw material alloy powder to perform mixed refining pelletizing, thirdly, adopting the warm flow compaction forming method to perform rotating shuttle compression molding, fourthly, performing degreasing and sintering in a sintering furnace, and fifthly, performing surface shaping treatment, so as to achieve the required size. The method has the advantages that Fe2NiMo, FeCrMo or FeCr is adopted as raw material, so that composition segregation and unnecessary internal impurities are eliminated, and the sintering and shrinkage uniformity of the product is good.

Description

technical field [0001] The invention relates to sewing machine accessories, in particular to a rotary hook in the sewing machine. Background technique [0002] The rotary hook is one of the key components in the sewing equipment, with a complex structure. The processing method of the outer shuttle is usually produced by mechanical processing. Patent 201110132497.9 is processed by powder metallurgy. [0003] The mechanical processing method cannot achieve large-scale and low-cost production, and the utilization rate of metal materials in the mechanical processing method is low. The injection molding method is used for production due to the fine particle size of the raw materials, high prices, and high product costs, and the injection molding process uses many additives. Dimensional accuracy guarantee ability is poor. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a method for manufacturing the rotary hook by u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22B22F3/16D05B57/14
Inventor 申建中
Owner ZHEJIANG YIHUO TECH