Technique of processing sewing machine shuttle putamen stay wire bore ram compression angle and mold thereof

A sewing machine and bobbin case technology, which is applied in the field of sewing machinery, can solve the problems of pilling, uneven edges of the thread-pulling hole of the bobbin case, and thread breakage, etc., and achieves the effects of low cost, simple and easy operation, and reasonable process.

Active Publication Date: 2011-01-19
ZHEJIANG HUAYA MACHINE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention mainly aims at technical problems such as pilling and thread breakage due to the uneven edge of the thread hole of the bobbin case in the process of using the sewing machine in the prior art, and provides a reasonable structure capable of smoothing the edge of the thread hole, The process and mold for processing the punching angle of the thread hole of the sewing machine bobbin case with the advantages of reducing the damage of the thread hole to the thread

Method used

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  • Technique of processing sewing machine shuttle putamen stay wire bore ram compression angle and mold thereof
  • Technique of processing sewing machine shuttle putamen stay wire bore ram compression angle and mold thereof
  • Technique of processing sewing machine shuttle putamen stay wire bore ram compression angle and mold thereof

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Embodiment 1

[0026] Such as figure 1 , figure 2 As shown, there is a backguy hole 1 on one side of the bobbin case 2, and the backguy hole 1 is only the processing object of the present invention; as image 3 As shown, the surface 3a of the wire hole made by the old technology is not smooth, which is easy to cause the wire to be broken; Figure 4 As shown, after punching the surface 3b of the cable hole in this technology, the surface of the cable hole is very smooth and achieves the expected purpose; as Figure 5 , Figure 6 As shown, an upper punch 6 is arranged radially at the lower end of the upper cylinder 5, and the upper cylinder and the upper punch are integrally made, and then processed to produce an arc transition 4, and the lower cylinder 7 is perpendicular to its axial direction. A lower punch 8 is provided, and the lower punch 8 is embedded and installed on the lower cylinder 7 . There is an arc transition 4 between the top of the lower punch 8 and the side wall of the lo...

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Abstract

The present invention relates to sewing machine part producing technology, and is especially the punching process and punch die for machining the thread hole in shuttle case of sewing machine. The present invention aims at machining thread hole in shuttle case of sewing machine with smooth edge and less damage to thread. The punching process includes punching the outside of the thread hole with one upper punch die, punching the inside of the thread hole with one lower punch die and maintaining arc smooth transition between different punched surfaces.

Description

technical field [0001] The invention relates to a part production process in the field of sewing machines, in particular to a process for processing the punching angle of a thread hole of a bobbin case of a sewing machine and a mold thereof. Background technique [0002] After decades of development, my country's sewing machine industry has formed a considerable scale and a certain level, and its production volume ranks first in the world. At present, the world's sewing machine producers are mainly concentrated in a few countries and regions such as Germany, Japan, my country and South Korea. my country's industrial sewing machine output is the largest, accounting for more than 50% of the world's output. At present, my country has become a world-recognized major producer and user of sewing machines. At the same time, my country is the largest sewing machine market. Therefore, all the famous international companies have been transferred to my country. As more and more develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D37/10B21D22/02
Inventor 徐凤南应江宝
Owner ZHEJIANG HUAYA MACHINE PARTS
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