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Manufacturing technology for inorganic vacuum shell mold for casting and special equipment

A technology of manufacturing process and special equipment, applied in casting and molding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of difficulty in cleaning sand, many mold shells, cleaning sand and solid waste, etc., to improve the quality of shell molds and ensure the shot Sand effect, convenient sand cleaning effect

Active Publication Date: 2021-09-03
盐城大丰赛维铸造科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, in the steel casting industry, the traditional lost-wax molding process is used to manufacture shell shapes. The lost-wax molding process uses materials such as water glass and ammonium chloride. During the molding process, there will be odor and toxic gas emissions. Before casting, it is necessary to Roasting and cooling the shell at high temperature, there are many pores in the shell, which affects the quality of the shell, and the molding time is longer, usually about eight days. It is difficult to clean the sand, and solid waste will be formed after sand cleaning.

Method used

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  • Manufacturing technology for inorganic vacuum shell mold for casting and special equipment

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Embodiment 1

[0021]The manufacturing process of the inorganic vacuum shell mold for casting includes the following process steps: preparing pearl sand and inorganic binder, the pearl sand is 40-140 mesh, and the formula of the inorganic binder includes the following components according to the mass percentage: 67% sodium Water glass, 19% water, 2.4% lithium water glass, 4.8% sodium methyl silicate solution, 1.2% borax, 1.6% sodium tripolyphosphate, 1.5% wood fiber and 2.5 potassium tetraborate, the mold of the sodium water glass number is 2.4-3.5, the solid content of the lithium water glass is 30%, the modulus is 3, and the density is 2.4, the solid content of the sodium methyl silicate solution is 33%, and the sand is placed in a mixer for stirring , according to the mass percentage, add 3% inorganic binder to it, and stir continuously for 1 minute to form inorganic wet coated sand; open the temperature control box of the special equipment for inorganic vacuum shell type casting, heat the...

Embodiment 2

[0023] The manufacturing process of an inorganic vacuum shell mold for casting comprises the following process steps: preparing sea sand and an inorganic binder, the sea sand is 40-140 mesh, and the formula of the inorganic binder includes the following components according to mass percentage: 38% sodium Water glass, 32% water, 8% lithium water glass, 10.2% sodium methyl silicate solution, 3.4% borax, 4.4% sodium tripolyphosphate, 1.5% wood fiber and 4.5% potassium tetraborate, the sodium water glass The modulus is 2.4-3.5, the solid content of the lithium water glass is 30%, the modulus is 3, and the density is 2.4, the solid content of the sodium methyl silicate solution is 33%, and the sand is placed in a mixer for Stir, add 10% inorganic binder to it according to the mass percentage, and continue to stir for 5 minutes to form inorganic wet coated sand; open the temperature control box of the special equipment for inorganic vacuum shell type casting, heat the mold through th...

Embodiment 3

[0025] The manufacturing process of the inorganic vacuum shell mold for casting, including the following process steps: preparing the mixed sand of pearl sand and sea sand, inorganic binder, pearl sand 40-140 mesh, sea sand: 40-140 mesh, the pearl sand and sea sand The sand mixing ratio is 2:8, and the formula of the inorganic binder includes the following components according to the mass percentage: 44% sodium water glass, 35% water, 5.5% lithium water glass, 6% sodium methyl silicate solution, 2 % borax, 3% sodium tripolyphosphate, 1.5% wood fiber and 3% potassium tetraborate, the modulus of the sodium water glass is 2.4-3.5, the solid content of the lithium water glass is 30%, and the modulus is 3 , the density is 2.4, the solid content of the sodium methyl silicate solution is 33%, the sand is placed in the mixer and stirred, and 6% of the inorganic binder is added thereto according to the mass percentage, and the stirring is continued for 3 minutes to form an inorganic We...

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Abstract

The invention discloses a manufacturing technology for an inorganic vacuum shell mold for casting and special equipment. The technology comprises the steps of using an inorganic binder and ceramsite, or an inorganic binder and mixed sand of ceramsite and sea sand, or an inorganic binder and pure sea sand, performing forming and heating curing by using the special equipment for the inorganic vacuum shell mold, and performing vacuumizing, drying, coating spraying and assembling on the shell mold after mold stripping to obtain the inorganic vacuum shell mold for casting. Compared with traditional lost-wax molding and casting, the molding and casting process using the technology has the following advantages that smoke and toxic gas emission is avoided in the molding and casting process, the gas evolution amount of the shell mold is about 1.5 ml / g, pores in the product are greatly reduced, and the quality of the shell mold is improved; and it is unnecessary to perform high-temperature roasting on the shell mold before casting, casting can be directly performed, a sand mold after casting can collapse easily, sand cleaning is convenient, the sand mold after collapsing can be recycled, casting can be performed on the same day of molding, and the molding and casting time is greatly shortened.

Description

technical field [0001] The invention relates to the steel casting industry, in particular to a manufacturing process and special equipment for an inorganic vacuum shell mold for casting. Background technique [0002] At present, in the steel casting industry, the traditional lost-wax molding process is used to manufacture shell shapes. The lost-wax molding process uses materials such as water glass and ammonium chloride. During the molding process, there will be odor and toxic gas emissions. Before casting, it is necessary to Roasting and cooling the shell at high temperature will result in more pores in the shell, which will affect the quality of the shell. The molding time will be longer, generally about eight days, and it will be difficult to clean the sand. Solid waste will form after sand cleaning. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a manufacturing process and special equipment for an inorganic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C9/12B22C1/02B22C1/18B22C13/08B22C15/24B22C19/00B22C23/02
CPCB22C9/04B22C9/12B22C1/02B22C1/18B22C13/085B22C15/24B22C19/00B22C23/02
Inventor 蒋昊党锋肖燕鹏王康
Owner 盐城大丰赛维铸造科技有限公司