Coating for lost foam casting

A lost foam casting and coating technology, which is applied to casting molding equipment, coatings, casting molds, etc., can solve the problems of poor adhesion, coating and leveling, etc., achieve fast wetting speed, improve bonding strength, The effect of improving coating performance and leveling performance

Inactive Publication Date: 2016-12-14
河北瑞欧消失模科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a coating for lost foam casting to solve the problems of

Method used

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  • Coating for lost foam casting
  • Coating for lost foam casting
  • Coating for lost foam casting

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Bauxite 6.0kg, quartz powder 3.0kg, corn starch 120g, CMC 40g, yellow dextrin 60g, organic bentonite 140g, wood fiber 50g, polyurethane resin 150g, polyurethane modified phenolic resin 200g, fibrous wollastonite 340g.

Embodiment 2

[0020] Bauxite 5.9kg, quartz powder 2.8kg, potato starch 110g, CMC 50g, yellow dextrin 50g, organic bentonite 130g, wood fiber 60g, polyurethane resin 160g, polyurethane modified phenolic resin 180g, fibrous wollastonite 360g.

Embodiment 3

[0022] Bauxite 6.2kg, quartz powder 3.2kg, corn starch 130g, CMC 30g, yellow dextrin 70g, organic bentonite 160g, wood fiber 40g, polyurethane resin 140g, polyurethane modified phenolic resin 220g, fibrous wollastonite 320g.

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Abstract

The invention discloses a coating for lost foam casting. The coating comprises, by weight, 55-65 parts of bauxite, 25-35 parts of quartz powder, 1.0-1.5 parts of plant gum powder, 0.3-0.6 part of CMC, 0.4-0.8 part of yellow dextrin, 1.2-1.6 parts of organobentonite, 0.3-0.7 part of wood fiber, 1.2-1.7 parts of polyurethane resin, 1.5-2.5 parts of modified phenolic resin and 3.0-4.0 parts of wollastonite. According to the coating for lost foam casting, the wetting speed of the coating is high, the surface tension is lowered greatly, and the coating can be well attached to plastic adhesive tape in a coating and hanging manner, wherein the plastic adhesive tape is bonded with a white mold; coating and hanging are uniform without white exposure, the leveling of the coasting obtained after coating and hanging is good, a later repair process is saved greatly for workers in actual production operation, and production efficiency is improved; and the coating further has the comprehensive performance of good suspension, thixotropy and high-temperature permeability, high normal-temperature and high-temperature mechanical strength, non-cracking and the like. The coating for lost foam casting has wide application prospects in lost foam casting.

Description

technical field [0001] The invention relates to the technical field of lost foam casting, in particular to a coating for lost foam casting. Background technique [0002] Lost foam casting (also known as solid casting) is made of foam plastic (EPS, STMMA or EPMMA) polymer material to form a solid mold with exactly the same structure and size as the part to be cast. After coating and drying, Buried in dry quartz sand and subjected to three-dimensional vibration modeling, the casting mold box is poured with molten metal under negative pressure, so that the polymer material model is heated and vaporized, and then replaced by liquid metal to form a one-time molding after cooling and solidification New casting technology is a new casting technology for producing castings. In recent years, lost foam casting has achieved continuous and rapid development in the field of casting due to its outstanding advantages such as high dimensional accuracy of castings, less pollution, and low c...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22C9/04
CPCB22C3/00B22C9/04
Inventor 张玉涛李超巩运涛姚学东
Owner 河北瑞欧消失模科技有限公司
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