Sand core material for brake disc casting mold as well as preparation method and application of sand core material

A technology of casting molds and brake discs, which is applied in the direction of manufacturing tools, casting molding equipment, cleaning/processing machinery of casting materials, etc., can solve problems such as potential safety hazards, achieve improved ablation resistance, good yield, The effect of ensuring dimensional accuracy and surface quality

Pending Publication Date: 2022-08-05
南京中盛铁路车辆配件有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the manufacturing process of the existing sand core materials, there are certain safety hazards

Method used

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  • Sand core material for brake disc casting mold as well as preparation method and application of sand core material
  • Sand core material for brake disc casting mold as well as preparation method and application of sand core material
  • Sand core material for brake disc casting mold as well as preparation method and application of sand core material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A sand core material for a brake disc casting mold, comprising 20 parts by weight of ceramic sand, 70 parts by weight of quartz calcined sand, 1.0 part by weight of carbon nanotube-modified phenolic resin, 0.12 part by weight of taurine, 0.08 part by weight parts of calcium stearate, 0.01 part by weight of aminocarboxylate-based silane coupling agent and 0.01 part by weight of sodium nitrate.

[0039] The refractoriness of the ceramic sand is greater than or equal to 1750°C, and the expansion coefficient is less than or equal to 0.7%. Ceramic sand is sintered, and the main component is aluminum oxide.

[0040] Quartz calcined sand is obtained by heating quartz sand at high temperature.

[0041] The preparation method of the carbon nanotube modified phenolic resin is:

[0042] S01, the phenolic resin weighing 95% by mass percentage is added in the ethanol to dissolve completely, and the added weight of the ethanol is equivalent to 2 times the amount of the phenolic res...

Embodiment 2

[0056] A sand core material for a brake disc casting mold, comprising 30 parts by weight of ceramic sand, 70 parts by weight of calcined quartz sand, 1.1 parts by weight of carbon nanotube-modified phenolic resin, 0.132 parts by weight of adipic acid, 0.088 parts by weight parts of magnesium stearate, 0.011 parts by weight of aminopropylsilane coupling agent and 0.011 parts by weight of sodium nitrite.

[0057] The refractoriness of the ceramic sand is greater than or equal to 1750°C, and the expansion coefficient is less than or equal to 0.7%. Ceramic sand is sintered, and the main component is aluminum oxide.

[0058] Quartz calcined sand is obtained by heating quartz sand at high temperature.

[0059] The preparation method of the carbon nanotube modified phenolic resin is:

[0060] S01, the phenolic resin weighing 95.5% by mass percentage is added in ethanol to dissolve completely, and the added weight of ethanol is equivalent to 3 times the amount of the phenolic resin;...

Embodiment 3

[0070] A sand core material for a brake disc casting mold, comprising 30 parts by weight of ceramic sand, 70 parts by weight of calcined quartz sand, 1.2 parts by weight of carbon nanotube-modified phenolic resin, 0.144 parts by weight of adipic acid, 0.096 parts by weight parts of barium stearate, 0.012 parts by weight of an aminocarboxylate-based silane coupling agent, and 0.012 parts by weight of potassium nitrate.

[0071] The refractoriness of the ceramic sand is greater than or equal to 1750°C, and the expansion coefficient is less than or equal to 0.7%. Ceramic sand is sintered, and the main component is aluminum oxide.

[0072] Quartz calcined sand is obtained by heating quartz sand at high temperature.

[0073] The preparation method of the carbon nanotube modified phenolic resin is:

[0074] S01, the phenolic resin weighing 96% by mass percentage is added in ethanol to dissolve completely, and the added weight of ethanol is equivalent to 5 times the amount of the p...

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Abstract

The invention discloses a sand core material for a brake disc casting mold. The sand core material comprises 90-100 parts by weight of crude sand and 1.22-1.464 parts by weight of an additive, the crude sand comprises ceramic sand and quartz roasting sand in a weight ratio of (2-3): 7; the additives comprise 1.0-1.2 parts by weight of modified phenolic resin, an ammonia-free curing agent accounting for 12% of the added weight of the modified phenolic resin, a lubricant accounting for 8% of the added weight of the modified phenolic resin, a silane coupling agent accounting for 1% of the added weight of the modified phenolic resin and a collapsing agent accounting for 1% of the added weight of the modified phenolic resin. The invention further discloses a preparation method and application of the sand core material for the brake disc casting mold. The method has good collapsibility and deformability and low gas forming amount, the dimensional precision and the surface quality of products are guaranteed, and the defects of sand burning, sand inclusion and the like are not prone to being generated.

Description

technical field [0001] The invention relates to a sand core material for a brake disc casting mold, a preparation method and application thereof, and belongs to the technical field of brake discs. Background technique [0002] At present, the brake discs used in high-speed trains in my country mainly have different sizes such as Φ620mm×Φ245mm×85mm, Φ750mm×Φ460×110mm and Φ1040mm×Φ740mm×150mm, plus the machining allowance, the total projected area of ​​the casting is more than 4500cm². At the same time, on the inner side of the disk, there are high-density distribution of heat dissipation columns with large aspect ratios. Its forming structure has the following characteristics: the diameter of the disk surface is large and the thickness is small; the number of heat dissipation columns is large and the distribution density is large; the morphology, structure and mechanical properties of the friction surface on both sides of the disk body must be highly consistent. In response ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C1/02B22C1/10B22C1/22B22C5/04B22C9/22
CPCB22C1/00B22C1/2253B22C1/10B22C1/02B22C5/0409B22C9/22
Inventor 胡谦张保森房梦飞李鸽刘双虎李斌贺银陈魏朱东升
Owner 南京中盛铁路车辆配件有限公司
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