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Method for manufacturing rotating shuttle door wrench by utilizing flow temperature-pressure molding method

A technology of flow temperature pressing and forming method, applied in the field of sewing machine accessories, can solve the problems of inability to achieve large-scale, low-cost production by mechanical processing method, poor product dimensional accuracy guarantee ability, low utilization rate of metal materials, etc., and achieve consistent sintering shrinkage. Good performance, high utilization rate of metal materials, and the effect of eliminating component segregation

Inactive Publication Date: 2014-12-03
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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  • Method for manufacturing rotating shuttle door wrench by utilizing flow temperature-pressure molding method
  • Method for manufacturing rotating shuttle door wrench by utilizing flow temperature-pressure molding method
  • Method for manufacturing rotating shuttle door wrench by utilizing flow temperature-pressure molding method

Examples

Experimental program
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Effect test

example 1

[0036] 1. Polyethylene glycol (PEG), polyaldehyde and stearic acid are used as adhesives, and the addition amount is 1-5%. Nano fine powder is added as an activated sintering agent, and the particle size of the powder ranges from 2 to 180 microns. After mixing and granulating, it is used as a raw material for flowing warm pressing molding.

[0037] 2. Carry out flow warm-press 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 flowing warm-pressed powder blank at 800-1300°C under vacuum or 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%. Nano fine powder is added as an activated sintering agent, the particle size of the powder ranges from 2 to 80 microns, and after mixing and granulation, 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, with a mold temperature of 40-100°C. The combined detachable mold is adopted, and the inner cavity has the appearance of the final product.

[0044] 3. Sintering the flowing warm-pressed powder blank at 800-1300°C under vacuum or 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, and the addition amount is 1-5%. Nano fine powder is added as an activated sintering agent, and the particle size of the powder ranges from 2 to 180 microns. After mixing and granulating, it is used as a raw material for flowing warm pressing molding.

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

[0050] 3. Sintering the flowing warm-pressed powder blank at 800-1300°C under vacuum or 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 follow...

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Abstract

The invention discloses a method for manufacturing a rotating shuttle door wrench by utilizing flow temperature-pressure molding method. According to the invention, the rotating shuttle door wrench is made of an alloy material namely Fe2NiMo, FeCrMo or FrCr. The method for manufacturing the rotating shuttle door wrench comprises the following steps of: (1) producing raw material alloy powder by utilizing an atomization method; (2) adding nano fine powder and a bonding agent containing a surfactant and plasticizer into the raw material alloy powder to carry out mixing and granulating, wherein the raw material alloy nano fine powder is alloy powder formed by alloyed related alloy materials; (3) carrying out mold pressing and molding on the rotating shuttle door wrench by adopting a flow temperature-pressure molding process; (4) degreasing and sintering in a sintering furnace; and (5) carrying out surface reshaping treatment to obtain the needed size. According to the method, Fe2NiMo, FeCrMo or FrCr is used as the raw material so that component segregation and unnecessary inner impurities are eliminated; and the sintering and contracting consistency of a product is good.

Description

technical field [0001] The invention relates to sewing machine accessories, in particular to a rotary hook lock door wrench in the sewing machine. Background technique [0002] The rotary hook is one of the key components in the sewing equipment. The door lock wrench is the main accessory of the rotary hook and has a complex structure. The processing method of the door lock wrench 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/00B22F3/16B22F1/00C22C38/12D05B57/14
Inventor 申建中
Owner ZHEJIANG YIHUO TECH
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