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Preparation method for environment-friendly casting material

An environmental protection and casting technology, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of large environmental pollution, difficult recycling of molding sand, etc., and achieve the effects of easy availability of raw materials, favorable exhaust, and reduction of pore defects

Inactive Publication Date: 2016-06-01
青岛博泰美联化工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the production process of investment precision casting, ceramic sand is mostly used, and the mold shell broken after casting has difficulty in recycling the mold sand and the problem of serious environmental pollution. Therefore, it is necessary to find a high-performance and environmentally friendly mold shell preparation method. very necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of environmentally friendly casting material, characterized in that it comprises the following steps:

[0017] (1) Prepare wax molds, prepare corresponding wax molds, pouring systems, and risers according to the shape of the casting to be obtained, and bond them into wax modules;

[0018] (2) Surface coating preparation, using ethyl silicate as a binder, mixing fine corundum powder, ethyl silicate, fine sawdust, n-butanol, and cobalt aluminate to prepare the surface coating. The particle size of corundum powder is 300 mesh, and the particle size of fine sawdust is 240 mesh. The weight ratio of the above coating components is: fine corundum powder: ethyl silicate: fine sawdust: n-butanol: cobalt aluminate = 1800: 140: 100: 1:2;

[0019] (3) Dried surface sand: immerse the wax module in the surface coating pool, then take it out, blow air to the surface under rotating conditions to make the coating evenly, the blowing time is 30s; then under rotating condit...

Embodiment 2

[0025] A preparation method of environmentally friendly casting material, characterized in that it comprises the following steps:

[0026] (1) Prepare wax molds, prepare corresponding wax molds, pouring systems, and risers according to the shape of the casting to be obtained, and bond them into wax modules;

[0027] (2) Surface coating preparation, using ethyl silicate as a binder, mixing fine corundum powder, ethyl silicate, fine sawdust, n-butanol, and cobalt aluminate to prepare the surface coating. The particle size of corundum powder is 300 mesh, and the particle size of fine wood chips is 240 mesh. The weight ratio of the above coating components is: fine corundum powder: ethyl silicate: fine wood chips: n-butanol: cobalt aluminate = 2000: 160: 200: 2:5;

[0028] (3) Dried surface sand: immerse the wax module in the surface coating pool, then take it out, blow air to its surface under rotating conditions to make the coating uniform, the blowing time is 60s; then under rotating...

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Abstract

The invention discloses a preparation method for an environment-friendly casting material. The preparation method includes the steps of wax mold preparation, surface layer coating preparation, surface sand hanging, back layer coating preparation, back sand hanging, steam dewaxing, roasting and the like. According to the preparation method, fine wood bits and crop straw fibers serve as shell manufacturing materials, so that the using amount of refractory matter is reduced, and environmental protection is facilitated; reasonable matching is adopted, so that the breathability is increased on the premise that the shell strength is guaranteed; and cellular material attapulgite is adopted, so that exhausting is facilitated, the defect of casting air holes is reduced, the rate of finished products is increased, and meanwhile the weight of the mold shell is reduced.

Description

Technical field [0001] The invention belongs to the technical field of metal investment precision casting, and particularly relates to a preparation method of environmentally friendly casting materials. Background technique [0002] Mold precision casting is an advanced casting forming process, which is mostly used to realize complex, thin-walled, precision casting forming. It has huge advantages in precision jewelry, aeroengines and other precision molded parts. The traditional investment precision casting process is used Fusible materials (such as wax) are made into a fusible model (investment model for short), and several layers of special refractory coatings are coated on it, dried and hardened to form an integral module, and then melted from the module A method in which a hollow mold shell is obtained by investment molding, then the mold shell is sintered at a high temperature, and finally molten metal is poured into the casting. At present, in the production process of inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C1/00B22C3/00
CPCB22C9/04B22C9/20B22C1/00B22C3/00
Inventor 徐苹陈衍玲陈隽颖
Owner 青岛博泰美联化工技术有限公司
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