Expansible graphite alcohol-group casting coating and preparation method thereof
A technology of expanded graphite and casting coatings, which is applied to casting molding equipment, coatings, casting molds, etc. It can solve the problems of poor suspension stability, easy delamination, weak sand resistance, etc., and achieve high cost and good air permeability , low cost effect
Inactive Publication Date: 2014-09-03
方学军
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Problems solved by technology
[0003] However, alcohol-based casting coatings in the prior art have many defects, such as poor suspension stability, easy delamination during long-distance transportation and storage, poor high temperature resistance, low hardness, poor chemical stability, and low metal erosion resistance. , weak sand resistance, etc., make alcohol-based casting coatings have a single function and cannot meet large-scale industrial production
Method used
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Experimental program
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Effect test
Embodiment Construction
[0014] The described expandable graphite alcohol-based casting coating is characterized in that it is made of the following raw materials in parts by weight: magnesia powder 34, attapulgite 2, polyvinyl butyral 0.4, expandable graphite 30, hydrogen Aluminum oxide 1, cetyltrimethylammonium chloride 0.3, lychee leaves 10, linseed oil 1, phenolic resin 5, hexamethylenetetramine 3, ethanol 45, additives 3.
[0015] The auxiliary agent is made of the following raw materials in parts by weight: pig bone 26, rectorite 38, metakaolin 85, silica fume 30, silane coupling agent KH-5702, silica sol 0.4, nanometer silicon carbide powder 1, nanometer four Ferric oxide 1.2, angelica powder 0.6, sodium carboxymethyl starch 0.4, carboxymethyl cellulose 4, appropriate amount of water, the preparation method is to put pig bone, rectorite and metakaolin in a calciner at 560-680°C Calcined at low temperature for 2-3 hours, took it out, soaked it in 8-12% hydrochloric acid solution for 4-5 hours, f...
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Abstract
The invention discloses an expansible graphite alcohol-group casting coating, which is characterized by being prepared from the following raw materials in parts by weight: 30-40 parts of magnesite powder, 2-3 parts of attapulgite, 0.4-0.7 part of polyvinyl butyral, 30-45 parts of expansible graphite, 1-3 parts of aluminum hydroxide, 0.3-0.7 part of hexadecyl trimethyl ammonium chloride, 10-13 parts of lychee leave, 1-3 parts of linseed oil, 3-5 parts of phenol formaldehyde resin, 3-6 parts of hexamethylenetetramine, 45-67 parts of ethylalcohol and 3-7 parts of assistants. The expansible graphite alcohol-group casting coating is low in cost, energy-saving and environment-friendly; by optimizing the production technique process and the formula, the prepared coasting has the advantage of high-temperature resistance, strong strength and good air permeability.
Description
technical field [0001] The invention relates to the field of casting coatings, in particular to an expandable graphite alcohol-based casting coating and a preparation method thereof. Background technique [0002] Foundry coatings refer to casting auxiliary materials that are used to coat the surface of the cavity or sand core to change their surface refractoriness, chemical stability, metal erosion resistance, sand sticking resistance, etc. It is composed of various properties. It is a dispersion system composed of high-quality materials, and its composition mainly includes refractory materials, suspending agents, carriers, binders and special additives. When acting on castings, it is required that the coating has good process performance, work performance, quality stability and application reproducibility. Prevent defects such as cracking, trachoma, and white iron formation caused by excessive local cooling of casting products. There are many kinds of casting coatings, wh...
Claims
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IPC IPC(8): B22C3/00
Inventor 方学军
Owner 方学军