Method for preparing water-based coating for sand mold casting

A water-based coating and sand casting technology, which is applied to casting molding equipment, coatings, casting molds, etc., can solve the problems of unsatisfactory technical performance indicators, poor storage and stability of coatings, and poor brushing process performance. Achieve the effects of good brushing process performance, improved smoothness, and good suspension

Inactive Publication Date: 2012-04-11
福建港星建筑材料集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent literature discloses a kind of name is " alcohol-based or water-based sand powder anti-penetration sticky sand foundry coating " (publication number: CN1666828, publication date: September 14th, 2005), its raw material composition is complex and diverse, batching, preparation The procedures are c

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example one

[0018] A preparation method of sand casting water-based paint, which is composed of the following components in parts by weight: 20 parts of zircon powder, 20 parts of fused mullite powder, 15 parts of quartz powder, and 3 parts of lithium-based bentonite, 5 parts of flake graphite, 3 parts of silica sol, 0.5 part of sodium carboxymethyl cellulose, 0.5 part of sodium alkylbenzene sulfonate, 0.4 part of sodium sulfate, 0.3 part of sodium carbonate, 0.2 part of n-octanol, fatty alcohol polyoxyethylene 0.3 parts of ether and 30 parts of water, wherein the particle size of the zircon powder, fused mullite powder, and quartz powder can be 200-320 mesh, and the preparation method includes the following steps:

[0019] 1) Stir the zircon powder, fused mullite powder and quartz powder aggregates in a mill evenly, and then add 20% of the total water to the base material at a temperature of 55°C, moisten the base material and Stir; then add lithium bentonite, then add f...

Example Embodiment

[0022] Example two

[0023] A preparation method of sand casting water-based paint, which is composed of the following components in parts by weight: 30 parts of zircon powder, 15 parts of fused mullite powder, 20 parts of quartz powder, and 2 parts of lithium bentonite, 10 parts flake graphite, 2 parts silica sol, 0.8 parts sodium carboxymethyl cellulose, 0.3 parts sodium alkylbenzene sulfonate, 0.6 parts sodium sulfate, 0.2 parts sodium carbonate, 0.3 parts n-octanol, fatty alcohol polyoxyethylene 0.2 parts of ether and 40 parts of water, wherein the particle size of the zircon powder, fused mullite powder, and quartz powder can be 200-320 mesh, and the preparation method includes the following steps:

[0024] 1) Stir the zircon powder, fused mullite powder and quartz powder aggregate in a mill evenly, and then add 30% of the total water to the base material at a temperature of 45°C. Stir; then add lithium bentonite, then add flake graphite, and stir for 60 minutes;

[0025] 2) A...

Example Embodiment

[0027] Example three

[0028] A preparation method of sand casting water-based paint, which is composed of the following components in parts by weight: 25 parts of zircon powder, 18 parts of fused mullite powder, 18 parts of quartz powder, 2.5 parts of lithium-based bentonite, 8 parts of flake graphite, 2.5 parts of silica sol, 0.65 parts of sodium carboxymethyl cellulose, 0.4 parts of sodium alkylbenzene sulfonate, 0.5 parts of sodium sulfate, 0.25 parts of sodium carbonate, 0.25 parts of n-octanol, fatty alcohol polyoxyethylene 0.25 parts of ether and 35 parts of water, wherein the particle size of the zircon powder, fused mullite powder, and quartz powder can be 200-320 mesh, and the preparation method includes the following steps:

[0029] 1) Stir the zircon powder, fused mullite powder and quartz powder aggregate in a mill evenly, and then add 25% of the total water to the base material at a temperature of 50°C, moisten the base material and Stir; then add lithium bentonite, ...

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Abstract

The invention discloses a method for preparing a water-based coating for sand mold casting, wherein the coating is prepared from zircon powder, fused mullite powder, quartz powder, lithium based bentonite, flake graphite, silicon sol, sodium carboxymethyl cellulose, sodium alkyl benzene sulfonate, sodium sulfate, sodium carbonate, n-caprylic alcohol, fatty alcohol-polyoxyethylene ether and water;and the preparation method comprises the following steps: 1) firstly, uniformly mixing the zircon powder, the fused mullite powder and the quartz powder aggregates with a proper amount of water in anattrition mill so as to obtain a base material; 2) sequentially adding the silicon sol, the sodium carboxymethyl cellulose, the sodium alkyl benzene sulfonate, the sodium sulfate, the sodium carbonate, the n-caprylic alcohol and the fatty alcohol-polyoxyethylene ether into the wet base material which is mixed, then adding a proper amount of water into the obtained mixture; and 3) adding the rest of water into the attrition mill, uniformly stirring and grinding.

Description

technical field [0001] The invention relates to the field of casting, in particular to the field of sand casting. Background technique [0002] When using sand molds to produce castings, it is a very important process to apply casting coatings on the working surface of the mold (core). Casting coating is a kind of refractory coating, and its main components are: refractory powder, carrier liquid, suspending agent, binder and other additives. The main function of the coating is: to block the direct contact between the molten metal and the surface of the sand mold (core), and play an isolation role, eliminating the necessary elements for the physical or chemical reaction between the molten metal and the surface of the sand mold (core), thereby effectively preventing and Reduce defects such as sand sticking, sand inclusions, and sand holes on the surface of castings; improve the surface strength of the mold (core); control the cooling rate of castings to prevent shrinkage cavi...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 朱小英
Owner 福建港星建筑材料集团有限公司
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