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A kind of aluminum alloy water-based casting paint and preparation method thereof

A technology for casting coatings and aluminum alloys, which is applied in casting molding equipment, metal processing equipment, coatings, etc., can solve the problems of easy formation of sand inclusion, blisters, many components, and difficulty in ensuring mixing uniformity, and avoid aluminum alloys. Effects of reactivity, high activity, high refractoriness and thermochemical stability

Active Publication Date: 2021-04-27
顺博铝合金湖北有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum alloy water-based casting coating prepared by patent ZL201510919169.1 uses modified attapulgite clay powder, lithium-based bentonite, nano-zirconia powder, graphite powder, and chromite powder as fillers. The uniformity of coating on the surface of the sand mold is easy to form defects such as sand inclusions and sand holes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of the above-mentioned aluminum alloy water-based casting coating comprises the following steps:

[0032] (1) Preparation of modified attapulgite clay / nano-graphite mixed powder:

[0033] S1: Weigh attapulgite clay with a fineness of 200-400 mesh and put it into distilled water, add oxalic acid and treat it at 80-100°C for 1-3 hours, and stir for 2-4 hours at the same time to prepare a suspension; the treated suspension Add the composite active agent prepared by mixing sodium oxalate and sodium hexametaphosphate, add the alkylphenol polyoxyethylene ether type active agent dropwise and stir for 2-4 hours, after standing still for 24-36 hours, the modified attapulgite clay is separated and suspended liquid;

[0034] S2: Add nano-graphite to the above-mentioned separated modified attapulgite clay suspension, stir for 10-30 minutes, then undergo centrifugation treatment at 2000-3000 rpm, filter and recover the solid matter;

[0035] S3: drying the s...

Embodiment 1

[0043] An aluminum alloy water-based casting coating, which consists of: modified attapulgite clay / nano-graphite mixed powder 35g, nano-zirconia powder 5g, chromite powder 3g, binder 15g, dispersant 3g, deionized 45g of water, 3g of styrene-acrylic emulsion, 0.2g of dimethyl polysiloxane; the dispersant is SD-00 produced by Nanjing Xiaoke Nano Ceramic Technology Development Co., Ltd.; the binder is SL8311 high temperature resistant product of Shilin Rubber Industry Glue; Concrete preparation method comprises the following steps:

[0044] (1) Preparation of modified attapulgite clay / nano-graphite mixed powder:

[0045] S1: Weigh 100g of attapulgite clay with a fineness of 300 mesh and put it into 1000ml of distilled water, add 25g of oxalic acid and treat it at 80°C for 2 hours, while stirring for 4 hours to prepare a suspension; add the treated suspension into sodium oxalate and Sodium hexametaphosphate prepared according to the mass ratio of 1:1 composite active agent 15g, d...

Embodiment 2

[0052] An aluminum alloy water-based casting coating, which consists of: modified attapulgite clay / nano-graphite mixed powder 40g, nano-zirconia powder 8g, chromite powder 5g, binder 20g, dispersant 2g, deionized 45g of water, 2g of styrene-acrylic emulsion, 0.5g of dimethyl polysiloxane; the product SD-00 produced by Nanjing Xiaoke Nano Ceramic Technology Development Co., Ltd. is selected as the dispersant; Glue; Concrete preparation method comprises the following steps:

[0053] (1) Preparation of modified attapulgite clay / nano-graphite mixed powder:

[0054] S1: Weigh 100g of attapulgite clay with a fineness of 400 mesh and put it into 900ml of distilled water, add 30g of oxalic acid and treat it at 90°C for 3 hours while stirring for 4 hours to prepare a suspension; add the treated suspension to the mixture made of sodium oxalate and Sodium hexametaphosphate prepared according to the mass ratio of 1:1.5 composite active agent 20g, dropwise added 15ml alkylphenol polyoxyet...

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Abstract

The invention relates to the technical field of paint preparation, in particular to an aluminum alloy water-based casting paint, the raw material composition and parts by weight are: 35-40 parts of modified attapulgite clay / nano-graphite mixed powder, nano-zirconia powder 5~10 parts, 3~5 parts of chromite powder, 15~20 parts of binder, 2~5 parts of dispersant, 40~45 parts of deionized water, 2~5 parts of emulsion, 0.1~0.5 parts of defoamer ; The present invention also provides the preparation method of the aluminum alloy water-based casting coating. The coating of the present invention can be coated on the surface of the sand mold abrasive tool, and has good wettability, brushability, air permeability and strength, and the nano-graphite powder is adsorbed on the surface of the modified attapulgite clay, which significantly reduces the graphite content added in the casting coating , no graphite dust will be generated in the metal casting process; and the preparation method provided by the invention does not add harmful substances, does not pollute the environment, has simple construction technology, low requirements on abrasive tools, and is suitable for large-scale use in factories.

Description

technical field [0001] The invention belongs to the technical field of paint preparation, and in particular relates to an aluminum alloy water-based casting paint and a preparation method thereof. Background technique [0002] As a light metal structural material, aluminum alloy has high specific strength, good rigidity, excellent impact resistance and shock absorption performance, and is widely used in aerospace and defense industry, automobile and electronic industry and other fields. [0003] At present, some aluminum alloy castings adopt the traditional sand casting method. The castings obtained have poor surface quality and low forming accuracy. Due to the strong activity of aluminum alloys and the characteristics of easy oxidation and combustion, it is very easy to Reactive slag pores are produced on the contact surface of the mold, which not only affects the quality of the casting but also leads to the waste of aluminum alloy raw materials. Coating a layer of release...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 姚义俊胡义秋谭敦峰王豪宋子豪
Owner 顺博铝合金湖北有限公司