Valve precision casting environment-friendly technology process

A technological process and precision casting technology, applied in the direction of casting molds, casting mold components, manufacturing tools, etc., can solve the problems of failing to meet the environmental protection standards of the foundry industry, threatening the natural ecological environment, complex technological processes, etc., and achieving easy molding and trimming. , low melting point, low energy consumption

Inactive Publication Date: 2018-08-03
浙江立大阀门有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] At the same time, precision castings will emit a large amount of sulfur dioxide and nitrogen oxides during the production process, which seriously threatens the natural ecological environment of our country and c

Method used

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  • Valve precision casting environment-friendly technology process
  • Valve precision casting environment-friendly technology process

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Embodiment Construction

[0044]The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0045] An environmental protection technological process of precision casting of valves, comprising the following steps:

[0046] A. Wax mold modeling: Heat the block wax and the wax material recovered from dewaxing to form a liquid mold material, stir the mold material evenly and settle for 2 to 5 hours, filter to remove impurities, and then filter the mold material The material is adjusted into a paste, poured into the molding equipment for cooling and molding, and the wax mold after cooling and molding is pressed and then cleaned and trimmed to remove flashes and burrs on the wax mold. Due to the low melting point of the wax material, the manuf...

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Abstract

The invention discloses a valve precision casting environment-friendly technology process. The valve precision casting environment-friendly technological process comprises the following steps of wax mould molding, shell making, dewaxing, roasting, melting and pouring, solidification, cleaning, shot blasting, welding repair and heat treatment. The valve precision casting environment-friendly technology is low in cost, low in rejection rate, simple in process and environmentally friendly. Wax blocks adopted by a casting model and wax materials recovered by the dewaxing are low in melting point,and a manufactured wax mould is low in cost, low in energy dissipation and energy-saving and environmental protection; liquid wax formed by the dewaxing can be recycled and used, waste water is not discharged, and energy conservation and environmental protection are achieved; a precision casting model is easy to be formed and dressed and with high precision and high yield; shells have high hardness, fire resistance and high impact resistance, the manufactured precision castings are non-clay; and during solidification and cooling, the castings do not produce shrinkage cavities and cracks.

Description

technical field [0001] The invention relates to the technical field of castings, in particular to an environmental protection process flow of precision casting of valves. Background technique [0002] With the continuous advancement of industrial structure upgrading, my country's demand for precision castings is also increasing, but it also puts forward more stringent requirements for the product size and surface finish of castings. [0003] For a long time, the main factors affecting the promotion and use of precision castings are the production cost and the demanding precision requirements of precision castings. In terms of production cost, due to the wide use of precision castings, the use of a single model is not large. To reduce the production cost of precision castings, the precision casting model should use reusable materials; at the same time, the precision casting model should use low melting point , Materials that are easy to shape and trim to improve the yield of...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C7/02
Inventor 刘建
Owner 浙江立大阀门有限公司
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