Novel compound hardening agent used for casting industry

A composite hardener, a new type of technology, applied in the direction of casting molding equipment, casting molds, cores, etc., can solve the problems of low shell strength, surface roughness and poor dimensional accuracy, so as to reduce human injury and improve surface quality and dimensional accuracy are good, and the effect of reducing production cost

Inactive Publication Date: 2016-04-06
安徽东升精密铸钢件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Water glass binder is generally prepared with quartz powder, sprinkled with quartz sand, and chemically hardened in chloride solution and crystallized aluminum chloride solution. The strength of the shell produced by this process is not high, and the surface roughness and Poor dimensional accuracy, mostly used for pouring carbon steel and low and medium alloy steel castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of novel compound curing agent that is used in foundry industry, comprises the component of following parts by weight: crystalline aluminum chloride 90 parts, ammonium chloride 10 parts, surfactant (sodium dodecylsulfonate: hexadecylsulfonate Potassium acid potassium = 1:1) 0.5 parts, dispersant (polyethylene glycol ester of fatty acid: polyacrylamide = 1:1) 0.5 parts, air-drying agent (fatty alcohol polyoxyethylene ether) 0.5 parts.

[0017] When preparing crystalline aluminum chloride, add aluminum hydroxide and waste hydrochloric acid into the reactor at a molar ratio of 1:1.02-1:1:1.15 to reflux for 0.5-1.5 hours, then filter, evaporate, crystallize, and centrifuge the reaction solution. , separation, and crystalline aluminum chloride can be obtained.

[0018] The crystalline aluminum chloride and other components obtained according to the above content are stirred, mixed and compounded to obtain the novel composite hardener for water glass investment casting...

Embodiment 2

[0020] A kind of novel compound curing agent that is used in foundry industry, comprises the component of following parts by weight: crystalline aluminum chloride 100 parts, ammonium chloride 15 parts, surfactant (sodium lauryl sulfonate: hexadecyl sulfonate Potassium acid potassium = 1:1) 1 part, dispersant (polyethylene glycol ester of fatty acid: polyacrylamide = 1:1) 1 part, air-drying agent (fatty alcohol polyoxyethylene ether) 1 part.

[0021] When preparing crystalline aluminum chloride, add aluminum hydroxide and waste hydrochloric acid into the reactor at a molar ratio of 1:1.02-1:1:1.15 to reflux for 0.5-1.5 hours, then filter, evaporate, crystallize, and centrifuge the reaction solution. , separation, and crystalline aluminum chloride can be obtained.

[0022] The crystalline aluminum chloride and other components obtained according to the above content are stirred, mixed and compounded to obtain the novel composite hardener for water glass investment casting of the...

Embodiment 3

[0024] A kind of novel compound curing agent that is used in foundry industry, comprises the component of following parts by weight: crystalline aluminum chloride 80 parts, ammonium chloride 5 parts, surfactant (sodium dodecylsulfonate: hexadecylsulfonate Potassium acid potassium = 1:1) 0.1 part, dispersant (polyethylene glycol ester of fatty acid: polyacrylamide = 1:1) 0.1 part, air-drying agent (fatty alcohol polyoxyethylene ether) 0.1 part.

[0025] When preparing crystalline aluminum chloride, add aluminum hydroxide and waste hydrochloric acid into the reactor at a molar ratio of 1:1.02-1:1:1.15 to reflux for 0.5-1.5 hours, then filter, evaporate, crystallize, and centrifuge the reaction solution. , separation, and crystalline aluminum chloride can be obtained.

[0026] The crystalline aluminum chloride and other components obtained according to the above content are stirred, mixed and compounded to obtain the novel composite hardener for water glass investment casting of ...

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PUM

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Abstract

A novel compound hardening agent used for the casting industry comprises, by weight, 80-100 parts of crystallized aluminium chloride, 5-15 parts of ammonium chloride, 0.1-1 part of surface active agent, 0.1-1 part of dispersing agent and 0.1-1 part of air drying agent. During preparation of the crystallized aluminum chloride, aluminium hydroxide and waste hydrochloric acid are added to a reaction kettle according to the mole ratio of 1:1.02 to 1:1.15 to be subjected to a backflow reaction for 0.5-1.5 h, reaction liquid is filtered, evaporated, crystallized, centrifuged and separated, and then the crystallized aluminum chloride can be prepared. The crystallized aluminum chloride prepared according to the content and other components are stirred, mixed and compounded to form the novel compound hardening agent of water glass investment casting.

Description

technical field [0001] The invention relates to the field of casting, in particular to a novel composite hardening agent used in the foundry industry. Background technique [0002] Investment casting, also known as "lost wax casting", usually refers to making a pattern from a fusible material, coating several layers of refractory material on the surface of the pattern to make a shell, and then melting the pattern out of the shell to obtain a non-parting surface The casting mold can be filled with sand and poured after high-temperature roasting. Since patterns are widely made of waxy materials, investment casting is often referred to as "lost wax casting". [0003] Water glass binder is generally prepared with quartz powder, sprinkled with quartz sand, and chemically hardened in chloride solution and crystallized aluminum chloride solution. The strength of the shell produced by this process is not high, and the surface roughness and The dimensional accuracy is poor, and it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/10
CPCB22C1/10
Inventor 沈伯根
Owner 安徽东升精密铸钢件有限公司
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