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Water-based paint for metal casting

A water-based coating and metal casting technology, which is applied in the direction of casting molding equipment, metal processing equipment, coating, etc., can solve the problems affecting the performance of castings, carbon inclusions, etc.

Inactive Publication Date: 2016-06-29
CHONGQING YONGLIN MACHINERY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the full mold casting, due to the pyrolysis products produced during the combustion process of the polystyrene foamed plastic used, black carbon inclusion defects are formed on the surface and inside of the casting, which are distributed in agglomerates or strips
This carbon inclusion defect is quite common in the full mold casting process and affects the performance of the casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: a kind of water-based paint for metal casting, it is characterized in that, described water-based paint is proportioned according to the following parts by weight: 16 parts of zinc oxide, 4 parts of boric acid, 3.5 parts of sodium alkylsulfonate , 8 parts of quartz powder, 7 parts of bauxite, 4.5 parts of sodium silicate, and 45 parts of deionized water.

Embodiment 2

[0010] Embodiment 2: a kind of water-based paint for metal casting, it is characterized in that, described water-based paint is proportioned according to the following parts by weight: 15 parts of zinc oxide, 3.5 parts of boric acid, 3 parts of sodium alkylsulfonate , 6 parts of quartz powder, 7 parts of bauxite, 8 parts of sodium silicate, 40 parts of deionized water.

[0011] The invention provides a water-based coating for metal casting, sodium alkyl sulfonate decomposes and releases SO under the action of high heat 2 and CO 2 The main gas, and these two gases are heavier than air, the former is 2.23 times the density of air, the latter is 1.53 times the density of air, which is beneficial to expel the air in the cavity, and at the same time instantly forms a Gas protective film. SO 2 The reaction with the liquid surface of the casting produces a thinner MgS film, which blocks the contact between the liquid and the air. ; Boric acid generates boric anhydride (B 2 o 3 ...

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PUM

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Abstract

The invention discloses water-based paint for metal casting. The water-based paint comprises, by weight, 10-20 parts of zinc oxide, 2-5 parts of boric acid, 2-4 parts of alkyl sodium sulfonate, 5-10 parts of quartz powder, 5-10 parts of bauxite, 3-5 parts of sodium silicate and 30-50 parts of deionized water. The water-based paint for metal casting can resist a high temperature, improve a qualified rate and reduce a production cost.

Description

technical field [0001] The invention belongs to a water-based paint for metal casting. Background technique [0002] Foundry coating refers to a covering that is coated on the surface of the mold cavity or core to improve its surface refractoriness, chemical stability, metal erosion resistance, and sand sticking resistance. Full mold casting is to use polystyrene foamed plastic to replace the ordinary shape. After the mold is made, the molten metal is poured into it without taking out the pattern. Under the action of the molten metal, the plastic pattern burns, gasifies, and disappears, and the molten metal replaces the original plastic. The space occupied by the mold, the casting method to obtain the required casting after cooling and solidification. However, in the full mold casting, due to the pyrolysis products produced during the combustion of the polystyrene foamed plastic used, black carbon inclusion defects are formed on the surface and inside of the casting, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 毛永林
Owner CHONGQING YONGLIN MACHINERY EQUIP
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