Coating for lost foam cast iron

A technology of lost foam and cast iron, which is applied in the direction of coating, casting mold and casting mold composition, etc. It can solve the problems such as difficult discharge of foam plastic gasification, thick coating difficult to clean, pouring temperature, and carbon slag defects in iron castings, etc., to achieve elimination Effects of black defects, elimination of carbon black defects, and no deformation of the coating

Inactive Publication Date: 2009-11-04
山东醴泉机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous paint coating is thick, poor air permeability, foam plastic gasification is not easy to discharge, resulting in carbon slag defects in iron castings, or casting scrapping, affecting performance, low casting pass rate, low high temperature strength, uneven surface of castings after pouring, Affect the appearance of the casting, or increase the grindi...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 70 parts of bauxite, 30 parts of quartz powder, 3 parts of bentonite, 1 part of white latex, 0.8 parts of sodium carboxymethyl cellulose, 2.5 parts of water-soluble phenolic resin, 1 part of attapulgite, 4 parts of spodumene powder, polyoxygen 0.02 part of vinyl ether n-butanol, 0.02 part of n-pentanol, mix and stir the above raw materials with water to obtain the product.

Embodiment 2

[0013] 70 parts of bauxite, 30 parts of quartz powder, 2 parts of bentonite, 0.5 parts of white latex, 1.0 parts of sodium carboxymethyl cellulose, 2 parts of water-soluble phenolic resin, 2 parts of attapulgite, 2 parts of spodumene powder, Tween 0.01 part of n-octanol, 0.02 part of n-octanol, mix and stir the above raw materials with water to obtain the product.

Embodiment 3

[0015] 70 parts of bauxite, 30 parts of quartz powder, 5 parts of bentonite, 2 parts of white latex, 0.5 parts of sodium carboxymethyl cellulose, 3 parts of water-soluble phenolic resin, 0.5 parts of attapulgite, 5 parts of spodumene powder, polyoxygen 0.03 part of ethylene alkyl alcohol ether, 0.01 part of n-butanol, the above raw materials are mixed with water and stirred to obtain the product.

[0016] The technical characteristics of this coating and the excellent performance of the casting process:

[0017] In this paint formula, spodumene powder and attapulgite are kneaded together to make use of the good rheological properties of attapulgite slurry to make a pseudoplastic body. The thixotropic property makes the viscosity of the paint decrease under the action of agitating shear force. The thickness of the paint that is easy to brush and attached to the pattern is thin, and the viscosity rises when the agitation is stopped to ensure that the coating is uniform and does ...

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Abstract

The invention belongs to the technical field of coatings for lost foam, in particular to a coating for lost foam cast iron. The invention provides the coating for the lost foam cast iron, which comprises the following components (calculated as the weight): 70 portions of bauxite, 30 portions of quartz powder, 2 to 5 portions of bentonite, 0.5 to 2 portions of white latex, 0.5 to 1.0 portion of sodium carboxymethyl cellulose, 2 to 3 portions of water soluble phenolic resin, 0.5 to 2 portions of attapulgite, 2 to 5 portions of spodumene powder, 0.01 to 0.03 portion of surfactant, and 0.01 to 0.02 portion of defoaming agent. The coating has thin and even coatings and good air permeability; the surfaces of castings are smooth, clean, and level and easy to peel off, and black defects are eliminated; and the castings have level surfaces and high surface quality.

Description

technical field [0001] The invention belongs to the technical field of coatings for lost foam, in particular to a coating for lost foam cast iron. Background technique [0002] In the production of lost foam castings, due to the high carbon content and the incomplete gasification of the EPS foam during the pouring process, black defects are often caused, that is, black spots after processing, which cause the casting to be scrapped, and the air permeability and adsorption capacity of the pattern coating can be increased. Effectively eliminate black defects, but most refractory coatings increase the adsorption capacity while sacrificing the flatness of the casting surface, ensuring the surface quality of the castings but cannot guarantee the adsorption capacity and increase the difficulty of coating cleaning. The unevenness of the casting surface seriously affects the casting. Appearance Quality. In the production of lost foam castings, the preparation and drying of coatings ...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22C7/02
Inventor 刘则斌张传明耿庆会成学山
Owner 山东醴泉机械科技有限公司
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