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Water-based dip coating for 3D printing sand mold and preparation method thereof

A 3D printing and sand molding technology, applied in casting molding equipment, coating, molding and other directions, can solve the problems of unstable quality, the overall quality is not suitable for 3D printing sand molding, etc., to improve the use environment, efficient suspension stability, Excellent coating effect

Active Publication Date: 2018-10-16
NINGXIA KOCEL MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the quality of water-based dip coating used in production is unstable, and the overall quality is not suitable for the requirements of 3D printing sand molds

Method used

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  • Water-based dip coating for 3D printing sand mold and preparation method thereof
  • Water-based dip coating for 3D printing sand mold and preparation method thereof

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Experimental program
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Effect test

Embodiment 1—9

[0022] Water-based dip-coating coatings for 3D printing sand molds are made through the following steps:

[0023] A) according to the mass ratio requirement of the embodiment corresponding embodiment in table 1, weigh each component material;

[0024] B) Pretreatment of the composite suspending agent: Mix the components of the composite suspending agent in equal proportions with the same mass of water under stirring conditions, so that the components are completely dispersed and uniform, and stand for 12 to 24 hours to obtain the pretreated Composite floating agent;

[0025] C) Pretreatment of each component of the composite binder: Because phosphate does not require pretreatment, it can be directly put into dissolution when used, so the pretreatment of the composite binder components is divided into pretreatment of polyvinyl alcohol and α - The pretreatment of starch, and the pretreatment of the two components must be ready-to-use and ready-to-use to ensure the use effect. Pr...

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Abstract

The invention relates to the technical field of coatings for casting sand molds, in particular to a water-based dip coating for a 3D printing sand mold and a preparation method thereof. The water-based dip coating for the 3D printing sand mold is prepared from the following components, by mass: 50-75% of composite refractory aggregate, 3-6% of a composite suspending agent, 0.8-1.2% of a compositebinder, 0.1-0.5% of a penetrating agent, 0.2-0.6% of a leveling agent, 0.05-0.2% of a preservative, 2-5% of a fluxing agent, 0.1-0.3% of a defoaming agent and the balance water, and is characterized in that the composite refractory aggregate is formed by mixing one or a mixture of zircon powder, spodumene powder and carborundum powder with spinel powder according to the mass ratio of 50:(4.5-16.5), wherein the spinel powder is magnesium aluminate spinel powder, magnesium-chromium spinel powder or aluminum-chromium spinel powder, and the particle size of each component is 320-600 meshes. The water-based dip coating has the advantages of being excellent in coating performance, proper in permeability, good in leveling property, efficient in suspension stability, proper in coating thickness, good in sintering stripping property and super-strong in anti-sand-burning property.

Description

technical field [0001] The invention relates to the technical field of coatings for casting sand molds, in particular to a water-based dipping coating for 3D printing sand molds and a preparation method thereof. Background technique [0002] Since the sand grains used in sand mold 3D printing technology core making are finer than those used in traditional core making, and 3D printing sand molds have the characteristics of complex overall structure, etc., therefore, the application method has a very important impact on the quality of castings. The efficiency of brushing and spraying is low, and sometimes it cannot be applied internally; when using flow coating, there will be uneven coating thickness, insufficient penetration depth, leak coating and large flow marks, which will affect the precision of castings and cause sand sticking. The best way to apply is to use dip coating, which not only does not cause the above problems, but also has high efficiency. The performance of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 李天才郭永斌张景豫张勇
Owner NINGXIA KOCEL MOLD
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