Casting tin bronze water-based environmental protection coating for lost foam

An environmentally friendly coating and tin bronze technology, which is applied to casting molding equipment, coatings, casting molds, etc., can solve the problems of internal non-densification, poor coating performance, and low precision of casting surface quality

Inactive Publication Date: 2020-08-28
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Large degree of freedom in design
There are not many special coatings for tin bronze lost foam casting, and there are a series of problems such as poor performance of coatings, low precision of surface quality of castings, and lack of compactness inside.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In terms of parts by mass, a total of 100 parts of refractory substrate (containing 10 parts of mica + 20 parts of diatomite powder + 70 parts of pearl powder), 6 parts of sodium bentonite, 0.3 parts of CMC, 6 parts of silica sol, and 0.5 parts of PAM part, then add 0.2 part of xanthan gum;

[0028] 120 parts of water, 0.4 parts of JFC, 0.6 parts of SPA-202 and 0.03 parts of thymol

[0029] The particle size of the powder is all above 200 mesh;

[0030] The above-mentioned raw materials are mixed to obtain the cast tin bronze water-based environmental protection paint for lost foam.

[0031] The physical and chemical indicators of the coating are: viscosity (25°C, φ6.5) 7s, density 1.43g / cm 3 , Suspension rate 2h 98%, gas volume 1280 ℃ 19mL / g, coating strength is grade I.

Embodiment 2

[0033] In terms of parts by mass, a total of 100 parts of refractory substrate (containing 10 parts of mica + 30 parts of diatomite powder + 60 parts of pearl powder), 5 parts of sodium bentonite, 0.2 parts of CMC, 8 parts of silica sol, and 0.5 parts of PAM part, then add 0.15 part of xanthan gum;

[0034] 130 parts of water, 0.5 parts of JFC, 0.7 parts of SPA-202 and 0.04 parts of thymol

[0035] The particle size of the powder is all above 200 mesh;

[0036] The above-mentioned raw materials are mixed to obtain the cast tin bronze water-based environmental protection paint for lost foam.

[0037] The physical and chemical indicators of the coating are: viscosity (25°C, φ6.5) 6.5s, density 1.39g / cm 3 , Suspension rate 2h 98%, gas volume 1280 ℃ 18mL / g, coating strength is grade I.

Embodiment 3

[0039] In terms of parts by mass, a total of 100 parts of refractory substrate (containing 20 parts of mica + 30 parts of diatomite powder + 50 parts of pearl powder), 4 parts of sodium bentonite, 0.4 parts of CMC, 9 parts of silica sol, and 0.5 parts of PAM part, then add 0.3 part of xanthan gum;

[0040] 140 parts of water, 0.5 parts of JFC, 0.7 parts of SPA-202 and 0.05 parts of thymol

[0041] The particle size of the powder is all above 200 mesh;

[0042] The above-mentioned raw materials are mixed to obtain the cast tin bronze water-based environmental protection paint for lost foam.

[0043] The physical and chemical indicators of the coating are: viscosity (25°C, φ6.5) 6.5s, density 1.36g / cm 3 , Suspension rate 2h 98%, gas volume 1280 ℃ 16mL / g, coating strength is grade I.

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Abstract

The invention relates to the technical field of lost foam casting tin bronze coatings, and discloses a casting tin bronze water-based environmental protection coating for lost foam. The environmentalprotection coating contains a fire-resistant substrate, based on the fire-resistant substrate, relative to 100 parts by mass of the fire-resistant substrate, the environmental protection coating is further prepared from the components in parts by mass: 4-6 parts of sodium bentonite, 0.2-0.4 part of CMC, 6-9 parts of silica sol, 0.4-0.6 part of PAM, and 0.15-0.3 part of xanthan gum, wherein carrierliquid is water; and the fire-resistant substrate is prepared from the components in percentage by mass: 10-20% of mica, 20-30% of diatomite powder and 50-70% of pearlite powder. According to the casting tin bronze water-based environmental protection coating, in the lost foam casting application of tin bronze parts, obtained castings have no holes, and cracks and marks can be avoided.

Description

technical field [0001] The invention belongs to the technical field of tin bronze coatings for lost foam casting, and in particular relates to a water-based environmental protection coating for tin bronze castings for lost foam casting. Background technique [0002] The basic principle of lost foam casting is: apply a refractory coating layer on the foamed plastic pattern with similar casting shape, put it in the sand box, fill the surroundings of the pattern with dry sand, vibrate to make it compact, and then pour metal It is a casting method in which the foam plastic is pyrolyzed and disappears under the heat of the high-temperature metal liquid, so that the metal liquid is filled into the space where the foam plastic film disappears to complete the mold filling. [0003] As a casting method, lost foam casting has better characteristics than other casting methods: (1) The casting has high precision and low surface roughness. (2) The degree of freedom of design is large. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00B22C9/04
CPCB22C3/00B22C9/046
Inventor 柴知章王宜飞
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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