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Sewing machine part and its making process

A manufacturing method and sewing machine technology, applied to sewing machine components, sewing machine needle holders, sewing equipment, etc., can solve the problems of difficulty in maintaining the sliding performance of sliding parts and easy rusting

Inactive Publication Date: 2003-02-26
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, the sewing machine parts with such tiny recesses 9 have the problem that moisture is retained in the minute recesses 9 and is prone to rust if the parts are not used during storage and the like in a single piece.
[0012] In addition, there is a problem that it is difficult to maintain good sliding performance of sliding parts such as the needle bar 7 with only a small amount of lubricating oil.

Method used

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  • Sewing machine part and its making process
  • Sewing machine part and its making process
  • Sewing machine part and its making process

Examples

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Embodiment Construction

[0044] Below, refer to figure 1 - Figure 3 illustrates a first embodiment of the sewing machine component and its manufacturing method according to the invention. Places with the same or similar basic structure as before shall be described with the same symbols.

[0045] figure 1 Shown are a sliding member constituting a sliding portion of the sewing machine component of the first embodiment, and a needle bar 11 that performs a sewing operation on a to-be-sewn object.

[0046] The needle bar 11 is formed by using a carbon-containing metal such as chrome-molybdenum steel as a base material, processing the base material into a needle bar shape, and then carburizing, quenching, and tempering. For this reason, the carbon inside the needle shank 11 penetrates into the vicinity of the outer peripheral surface, whereby the portion near the outer peripheral surface of the needle shank 11 becomes relatively hard.

[0047] Therefore, the surface hardness of the needle bar 11 can be...

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Abstract

Sewing machine parts and a manufacturing method therefor capable of preventing the occurrence of rust and improving the slide property of a slide member. Many minute recessed parts 12 are formed and coats 13 of lubricating metal are formed on a slide face of metal on at least one side of a member to be slid and slide members 11 movable while sliding along the member to be slid via the lubricating metal particles.

Description

technical field [0001] The present invention relates to a sewing machine component and its manufacturing method, in particular, to a sewing machine component in which a plurality of microscopic recesses for storing lubricating oil are formed on at least one of the sliding component or the sliding component and its manufacturing method. Background technique [0002] Figure 5 The structure of a conventional conventional sewing machine is shown. This sewing machine 1 has an upper shaft 2 connected to a driving source not shown in the figure, and the upper shaft 2 is rotatable by the aforementioned driving source. [0003] The crankshaft 3 with a balance is connected to the end of the upper shaft 2 so as to follow the upper shaft 2 and rotate accordingly. [0004] A needle bar crank 4 is fixed on the aforementioned crankshaft 3 with a balance weight, and the needle bar crank 4 performs circular motion along with the rotation of the aforementioned crankshaft 3 with a balance wei...

Claims

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Application Information

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IPC IPC(8): C21D7/04D05B55/00
Inventor 饭岛秀和应性宝
Owner JUKI CORP
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