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Novel foundry coatings for large castings and cylinder heads and methods for their preparation

A technology for large-scale castings and coatings, applied to casting molding equipment, coatings, cores, etc., can solve the problems of special castings that cannot achieve the effect, and achieve the effects of reducing sulfur penetration defects, reducing labor costs, and reducing graphite content

Active Publication Date: 2021-01-08
贵阳灵峰铸造材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ordinary casting paint can basically solve most of the problems, but it can't achieve the effect on some special castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A new type of casting paint for large castings and cylinder blocks and cylinder heads. It is composed of the following raw materials in parts by weight: 1 part of suspending agent, 0.5 part of high-temperature binder, 1 part of special resin for environmental protection, and 0.8 part of high-speed dispersant , 0.5 parts of auxiliary agent, 2 parts of penetrating agent, 8 parts of mineral powder A, 1 part of mineral powder B, 1 part of mineral powder C, some purified water.

[0018] The mineral powder A added therein is high bauxite-mullite, the mineral powder B is high-purity flake graphite, and the mineral powder C is mica.

[0019] A preparation process for a novel foundry coating for large castings and cylinder heads, comprising the following steps:

[0020] 1) Prepare the first mixing tank, add purified water, special resin for environmental protection, high-temperature binder, and high-speed dispersant in order, start stirring, and get mixed liquid H after stirring...

Embodiment 2

[0026] A new type of casting coating for large castings and cylinder blocks and cylinder heads. It is composed of the following raw materials in parts by weight: 2 parts of suspending agent, 1 part of high-temperature binder, 4 parts of special resin for environmental protection, and 1 part of high-speed dispersant , 0.8 parts of additives, 3 parts of penetrating agent, 12 parts of mineral powder A, 1.5 parts of mineral powder B, 1.5 parts of mineral powder C, some purified water.

[0027] The mineral powder A added is bauxite-mullite, the mineral powder B is high-purity flake graphite, and the mineral powder C is mica.

[0028] A preparation process for a novel foundry coating for large castings and cylinder heads, comprising the following steps:

[0029] 1) Prepare the first mixing tank, add purified water, special resin for environmental protection, high-temperature binder, and high-speed dispersant in order, start stirring, and get mixed liquid H after stirring for 5-6 hou...

Embodiment 3

[0035] A new type of casting coating for large castings and cylinder blocks and cylinder heads. It is composed of the following raw materials in parts by weight: 4 parts of suspending agent, 2 parts of high-temperature binder, 6 parts of special resin for environmental protection, and 2 parts of high-speed dispersant , 1 part of auxiliary agent, 5 parts of penetrating agent, 16 parts of mineral powder A, 2 parts of mineral powder B, 2 parts of mineral powder C, some purified water.

[0036] The mineral powder A added therein is high bauxite-mullite, the mineral powder B is high-purity flake graphite, and the mineral powder C is mica.

[0037] A preparation process for a novel foundry coating for large castings and cylinder heads, comprising the following steps:

[0038] 1) Prepare the first mixing tank, add purified water, special resin for environmental protection, high-temperature binder, and high-speed dispersant in order, start stirring, and get mixed liquid H after stirri...

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PUM

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Abstract

The invention relates to a coating, specifically to a novel foundry coating for large-scale castings and cylinder body and cover and a preparation method thereof. The coating of the invention is composed of the following raw materials (by weight): 1-4 parts of a suspending agent, 0.5-2 parts of a high-temperature binder, 1-6 parts of resin for environmental protection, 0.8-2 parts of a high-speeddispersant, 0.5-1 part of an auxiliary agent, 2-5 parts of an osmotic agent, 8-16 parts of mineral powder A, 1-2 parts of mineral powder B, 1-2 parts of mineral powder C and several parts of purifiedwater. The invention also discloses a preparation method of the novel foundry coating for large-scale castings and cylinder body and cover. The invention has the following advantages: the environmentis protected; casting sintering, sand sticking and veining tendencies are reduced; and surface sulfurizing of castings is decreased.

Description

technical field [0001] The invention relates to a coating, in particular to a novel casting coating for large castings and cylinder heads and a preparation method thereof. Background technique [0002] In foundry production, in order to improve the surface quality of castings, it is necessary to apply a layer of refractory coating on the surface of the mold (core) to improve its surface heat resistance, chemical stability, resistance to molten metal erosion, mold release or resistance to corrosion. For the purpose of sand stickiness and other properties, casting coatings are also called casting (core) coatings. Applying coatings is to prevent defects such as sand sticking, sand inclusions, sand holes, pores, surface carbonization, and sulfuration in castings, improve the surface quality and grade of castings, reduce the cleaning workload of castings, improve the working environment, reduce production costs, and improve economic efficiency. benefit. [0003] Ordinary castin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 雍晓晋
Owner 贵阳灵峰铸造材料有限公司