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Tin alloy metal mold casting paint and preparation method thereof

A metal mold casting and tin alloy technology, applied in casting molding equipment, metal processing equipment, coating, etc., can solve the problems of oxidized wrinkled skin, thermal cracking, etc., and achieve the effect of reducing thermal cracking tendency, smooth surface, and not easy to precipitate

Inactive Publication Date: 2011-06-01
王可新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the above-mentioned prior art, and provides a novel tin alloy metal mold casting coating and a preparation method with excellent flame retardancy, thermal insulation, cohesiveness and coating properties, which solves the problems in the prior art. Pores or oxide wrinkles and hot cracks appear on the surface of castings in the production of tin alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Tin alloy metal mold casting coating composition (mass percentage): 5.5% of talcum powder, 1.5% of diatomite, 2% of water glass, 0.5% of attapulgite clay, 4% of sodium alkylsulfonate, 1.5% of boric acid and 85% of water. Mix the stick clay with 10 parts of water and grind it in a colloid mill or ball mill for 3 hours to make nail polish. Then put talcum powder, diatomaceous earth, sodium alkylsulfonate and boric acid into a colloid mill or a ball mill, add liquid A, water glass and water respectively and grind for 2 hours to get the tin alloy metal mold casting coating. When in use, heat the metal mold to about 60°C, apply a layer of 0.1mm thick tin alloy casting paint on the surface of the metal mold by spraying, and use it after drying. The coating prevents the tin alloy from burning in the casting mold during pouring, and obtains the tin alloy casting with no hot crack, smooth surface and no oxidation wrinkle.

Embodiment 2

[0019] Tin alloy metal mold casting coating composition (mass percentage): talcum powder 8%, diatomite 3%, silica sol 4%, palygorskite clay 1%, boric acid 3% and water 81%. Mix palygorskite clay with 20 parts of water and grind it in a colloid mill or ball mill for 3 hours to make nail polish. Put talcum powder, diatomaceous earth and boric acid into a colloid mill or a ball mill, respectively add liquid A, silica sol and water and grind for 2.5 hours to obtain a tin alloy metal mold casting coating. When in use, heat the metal mold to about 75°C, apply a layer of 0.2mm thick tin alloy casting paint on the surface of the metal mold by spraying, and use it after drying. The coating prevents the tin alloy from burning in the casting mold during pouring, and obtains the tin alloy casting with no hot crack, smooth surface and no oxidation wrinkle.

Embodiment 3

[0021] Tin alloy metal mold casting paint composition (mass percentage): talcum powder 7%, diatomite 3.5%, silica sol 3%, palygorskite clay 1.2%, sodium alkylsulfonate 2.9% and water 82.4%. Mix palygorskite clay with 15 parts of water and grind it in a colloid mill or ball mill for 2.5 hours to make nail solution. Then put talcum powder, diatomaceous earth, and sodium alkylsulfonate into a colloid mill or a ball mill, respectively add liquid A, silica sol, and water to grind for 3 hours, and then the tin alloy metal mold casting coating can be obtained. When in use, heat the metal mold to about 100°C, apply a layer of 0.2mm thick tin alloy casting paint on the surface of the metal mold by spraying, and use it after drying. The coating prevents the tin alloy from burning in the casting mold during pouring, and obtains the tin alloy casting with no hot crack, smooth surface and no oxidation wrinkle.

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PUM

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Abstract

The invention discloses a tin alloy metal mold casting paint with better heat preservation, fire resistance, cohesiveness and coating ability and a preparation method thereof. The coating comprises the following chemical components in percentage by weight: 3% to 9% of talcum powder, 1% to 5% of diatomite, 1% to 4% of cohesive agent, 0.1% to 2% of suspending agent, 2% to 10% of flame retardant and 72% to 91% of water, wherein the cohesive agent comprises water glass and silica sol, the suspending agent comprises attapulgite clay, palygorskite clay and the like, and the flame retardant comprises alkyl sodium sulfonate and boracic acid. The tin alloy metal mold casting paint has the advantages of the stronger heat preservation, the fire resistance, the cohesiveness and the coating ability as well as excellent suspension property, and is difficult to precipitate in use and beneficial to obtaining tin alloy paint with smooth surface and non-oxidation wrinkled skins.

Description

technical field [0001] The invention relates to a metal mold casting coating, in particular to a tin alloy metal mold casting coating with strong thermal insulation, flame retardancy, cohesiveness and coating properties and a preparation method thereof. Background technique [0002] Liquid tin reacts with oxygen, nitrogen in the atmosphere and water in the mold. The resulting surface films such as tin oxide and tin nitride have a low density coefficient and poor thermal conductivity, and the large amount of heat released by the reaction cannot be dissipated quickly. Go out, causing the temperature on the reaction interface to rise rapidly, and the temperature rise accelerates the oxidation of tin and intensifies the combustion of tin. As a result, holes or oxide wrinkles appear on the surface of the casting, and in severe cases, the casting is scrapped. Therefore, preventing the burning of tin alloy in the mold during pouring is one of the key technologies to improve the qu...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 王可新
Owner 王可新
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