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Lubricant composition for sewing machines

A technology of lubricant composition and sewing machine, which is applied in the field of lubricant composition and sewing machine device, and can solve the problems such as inability to exert the additive effect

Inactive Publication Date: 2004-06-16
NIPPON STEEL CHEMICALL &MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Also in the case of using non-oil-soluble additives, it is considered that solid additives cannot be immersed in the small gaps in the sliding part, and the expected additive effects (sintering resistance, wear resistance) cannot be exerted.

Method used

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  • Lubricant composition for sewing machines

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Experimental program
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Effect test

Embodiment

[0037] Next, the present invention will be described by way of examples and comparative examples. ,

[0038] Using the base oils shown in Table 1, the lubricating oil compositions for sewing machines shown in Tables 2 to 5 were obtained. For the lubricant compositions for sewing machines of Examples 1 to 14 and the compositions of Comparative Examples 1 to 11, a sewing machine durability tester (spindle rotation speed: 4000 rpm, surface pressure: 0.4 N / mm, Test time: until sintering stops), carry out endurance test. The amount of lubricant injected into the bearing is about 1 cc. The rule at the end of the test is that the formed circuit controls the current value of the motor that rotates the spindle. When an overcurrent exceeding the specified current value occurs, the motor is turned off. Lubricant is only injected initially. Table 6 shows the results of the sewing machine durability test.

[0039] In the examples and comparative examples shown in Tables 2 to 5, the same...

Embodiment 6

[0067] Both the base oils of Example 6 and Comparative Example 1 are polyalphaolefins. However, comparing the base oil PO2 of Example 7 with a single-component base oil composition and the PO3 initially obtained as a mixture at the time of manufacture, it can be clearly seen that the single-component PO2 is clearly efficient. When lubricating oil having a molecular weight distribution is used as the base oil, it is considered that low molecular weight components are introduced into the lubricating surface and high molecular weight components are excluded, resulting in insufficient oil (oil shortage) in the sliding part. Therefore, the once-excluded high-molecular-weight component does not provide permanent lubrication to the sliding part, and cannot produce an effect beyond expectation.

[0068] Example 14 and Comparative Example 11 were used to compare oil-soluble additives and non-oil-soluble additives, and it was found that the durability time was long when the oil-soluble ...

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Abstract

To provide a lubricant composition for sewing machines which excels in lubricity.The lubricant composition for sewing machines uses a single compound or component as a base oil in the lubricant composition composed of the base oil and additives to be encapsulated in a gap of the bearing surface opposite to the sliding surface of a direct acting shaft to support through a gap. (C)2004,JPO.

Description

technical field [0001] The present invention relates to a lubricant composition suitable as a lubricant for sewing machines and a sewing machine device using the lubricant composition for sewing machines. Background technique [0002] The lubrication of the sewing machine device generally adopts a structure in which lubricating oil is injected by the user, or lubricating oil is supplied through an impregnating agent such as felt. The lubricating oil used is mostly vegetable oil or mineral oil, and durability, etc. are not considered. Therefore, it is a situation where oiling or maintenance is required in a short period. In JP 10-113490 and JP 2002-45587, commercially available lubricating grease is injected into the sliding part in relative motion for the purpose of reducing the friction effect, and the maintenance cycle cannot be extended only by applying grease. Japanese Unexamined Patent Publication No. 8-155173 discloses the needle bar structure of an industrial sewing...

Claims

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Application Information

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IPC IPC(8): D05B71/00C10M105/04C10M105/36C10M105/38C10M107/08C10M125/26C10M135/04C10M135/06C10M135/18C10M135/22C10M137/02C10M137/04C10M137/08C10M137/10C10M139/00C10M139/06C10M169/02C10M169/04C10N10/04C10N10/12C10N30/06C10N40/06C10N50/10
Inventor 长野克己大利人美北村哲弥青木彦治
Owner NIPPON STEEL CHEMICALL &MATERIAL CO LTD
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