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Needle bar holder for sewing machine and preparation method thereof

A sewing machine needle and aluminum alloy technology, which is applied to sewing machine needle holders, sewing machine components, sewing equipment, etc., can solve problems such as poor wear resistance, and achieve a simple and easy preparation process, good mechanical properties, and excellent friction resistance. Effect

Active Publication Date: 2019-05-10
NINGBO RUIMING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of poor wear resistance in the prior art, the present invention provides a sewing machine needle bar holder with good wear resistance and excellent mechanical properties and its manufacturing method, which can effectively improve the service life of the needle bar holder

Method used

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  • Needle bar holder for sewing machine and preparation method thereof
  • Needle bar holder for sewing machine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] According to the mass percent of the aluminum alloy composition in Example 1 of Table 1, the aluminum alloy was prepared:

[0034] S1. Heat the aluminum ingot to 700°C to melt. After it is completely melted, add Mg alloy and aluminum intermediate alloys of Si, Cr, C, V, Mo, Nb, Ni, and B according to the proportion, and form a melt after fully mixing;

[0035] S2: Maintain the melt temperature, add a compound refining solvent with a mass ratio of hexachloroethane and sodium fluorosilicate of 1:1, the amount of refining solvent added is 0.2% of the total charge mass, and refine and purify the melt , to remove the slag and harmful gas in the melt until there is no gas and bubbles escape, and then the scum is removed after standing for 10 minutes; then the Eu and La compound rare earth element aluminum master alloy with a mass ratio of 2:1 is added In the melt, mix evenly;

[0036] S3, casting the melt processed in step S2 into a sewing machine needle bar embracing billet...

Embodiment 2

[0039] According to the mass percent of the aluminum alloy composition in Example 2 of Table 1, the aluminum alloy was prepared:

[0040] S1. Heat the aluminum ingot to 720°C to melt. After it is completely melted, add Mg alloy and aluminum intermediate alloys of Si, Cr, C, V, Mo, Nb, Ni, and B according to the proportion, and form a melt after fully mixing;

[0041] S2: Maintain the melt temperature, add a compound refining solvent with a mass ratio of hexachloroethane and sodium fluorosilicate of 2:1, the amount of refining solvent added is 0.4% of the total charge mass, and refine and purify the melt , to remove the slag and harmful gas in the melt, until there is no gas and bubbles escape, let stand for 15 minutes and remove the scum; then add the aluminum master alloy of Ce to the melt and mix evenly;

[0042] S3, casting the melt processed in step S2 into a sewing machine needle bar embracing billet;

[0043] S4. Perform annealing treatment on the casting slab of the se...

Embodiment 3

[0045] According to the mass percent of the aluminum alloy composition in Table 1 Example 3, the aluminum alloy was prepared:

[0046] S1. Heat the aluminum ingot to 750°C and melt it. After it is completely melted, add Mg alloy and aluminum intermediate alloys of Si, Cr, C, V, Mo, Nb, Ni, and B according to the proportion, and fully mix to form a melt;

[0047] S2: Maintain the melt temperature, add a compound refining solvent with a mass ratio of hexachloroethane and sodium fluorosilicate of 1.5:1, the amount of refining solvent added is 0.3% of the total charge mass, and refine and purify the melt , to remove the slag and harmful gas in the melt, until there is no gas and bubbles escape, let it stand for 20 minutes and remove the scum; then add the aluminum master alloy of La to the melt and mix evenly;

[0048] S3, casting the melt processed in step S2 into a sewing machine needle bar embracing billet;

[0049] S4. Perform annealing treatment on the casting slab of the se...

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Abstract

The invention relates to a needle rod holder and a preparation method thereof, and belongs to the field of alloy materials. The sewing machine needle rod holder is manufactured by a wear-resistance aluminum alloy; and the wear-resistance aluminum alloy comprises the following components in percentage by mass: 5.0-8.0% of Mg, 1.0-3.0% of Si, 1.1-2.8% of C, 0.28-1.05% of Cr, 0.12-0.5% of V, 0.08-0.3% of Mo, 0.1-0.6% of B, 0.07-0.65% of Ni, 0.03-0.25% of Nb, 0.02-0.06% of Re, and the balance of Al. The sewing machine needle rod holder is prepared by performing such steps as melting, refining, modification, casting and annealing for the wear-resistance aluminum alloy; and the needle rod holder is excellent in mechanical performance and friction resistance.

Description

technical field [0001] The invention relates to a needle bar holder and a preparation method thereof, belonging to the field of alloy materials. Background technique [0002] Aluminum alloy has the characteristics of light weight, good strength and toughness, corrosion resistance and unique metallic luster, and is adopted by more and more mechanical parts, such as electrical appliances, lighting devices, automobiles, etc. In order to meet the needs of thin-walled parts, light weight, rapid heat dissipation and casting production, higher and higher requirements are put forward for the casting fluidity, thermal conductivity and mechanical properties of aluminum alloys. [0003] The needle bar holder on the sewing machine is mainly used to clamp the needle bar. The existing needle bar holders are generally cast from aluminum alloy. Due to the characteristics of the existing aluminum alloy material, its tensile strength and bending strength , the hardness is relatively low, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047D05B55/00
CPCC22C1/026C22C1/03C22C1/06C22C21/08C22F1/047D05B55/00
Inventor 冯光松
Owner NINGBO RUIMING MACHINERY