A method for manufacturing a cavity structure formwork shell
A manufacturing method and cavity technology, which are used in manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problems of the inner cavity mold shell being unable to resist the impact of high-temperature molten metal, affecting the product qualification rate, and poor high-temperature strength. Ensure accurate molding, prevent molten metal leakage, improve high temperature strength effect
Active Publication Date: 2021-06-01
ZHONGCHAO HANGYU INVESTMENT CASTING S&T CO
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Problems solved by technology
[0002] Investment casting products usually have a complex cavity structure. In order to achieve the complete molding of the cavity, it is usually carried out by filling the refractory mud or sand after preparing the surface layer formwork and 1-2 layers of back layer formwork. The high-temperature strength of refractory mud is poor, and the sand material has large pores, which may easily cause the mold shell in the inner cavity to be unable to resist the impact of high-temperature molten metal, resulting in an accident that the molten metal leaks from the mold shell during the pouring process, which affects the qualified rate of the product , also prone to safety accidents
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[0023] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0024] A method for manufacturing a cavity structure formwork provided according to the present invention, comprising:
[0025] Step M1: fully drying the cavity prepared with the surface layer formwork and the back layer formwork;
[0026] Specifically, the step M1 includes: fully drying the cavity in which the surface layer formwork and the two-layer back formwork are prepared.
[0027] Step M2: Use fused silica, mullite, aluminum dihydrogen phosphate and silica sol to form the filling material to pre...
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The invention provides a method for manufacturing a cavity structure formwork, comprising: step M1: fully drying the cavity prepared with a surface layer formwork and a back layer formwork; step M2: using fused silica, mullite, The filling material composed of aluminum dihydrogen phosphate and silica sol is used to prepare the cavity filling material for investment casting; step M3: quickly pour the configured cavity filling material into the cavity and let it stand for a preset time to ensure the ventilation of the surrounding area, Control the temperature within the preset range and the humidity within the preset range. The invention improves the high-temperature strength of the mold shell in the inner cavity, ensures the precise molding of the cavity, improves the qualification rate of complex investment precision casting products, and has positive effects on preventing the leakage of molten metal and ensuring safe production.
Description
technical field [0001] The present invention relates, in particular, to a method for manufacturing a cavity structure formwork. More specifically, the mold shell manufacturing method for realizing the cavity structure of the investment precision casting can be used for filling the cavity of the mold shell for the investment precision casting of alloys such as steel and superalloy. Background technique [0002] Investment casting products usually have a complex cavity structure. In order to achieve the complete molding of the cavity, it is usually carried out by filling the refractory mud or sand after preparing the surface layer formwork and 1-2 layers of back layer formwork. The high-temperature strength of refractory mud is poor, and the sand material has large pores, which may easily cause the mold shell in the inner cavity to be unable to resist the impact of high-temperature molten metal, resulting in an accident that the molten metal leaks from the mold shell during th...
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IPC IPC(8): B22C9/04B22C1/00B22C9/24
CPCB22C1/00B22C9/04B22C9/24
Inventor 王俊王国祥李建中姚满程祥
Owner ZHONGCHAO HANGYU INVESTMENT CASTING S&T CO