A molding process of a fire safety valve
A molding process and valve technology, which is applied in the field of molding technology of fire safety valves, can solve the problems of low processing efficiency and time-consuming, and achieve the effects of high processing efficiency, short processing time and high valve precision
Active Publication Date: 2021-12-14
XIANGAN FIRE TECH CO LTD
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Problems solved by technology
[0004] Therefore, in view of the above-mentioned problems, the present invention proposes a molding process for fire safety valves, which solves the technical problems of low processing efficiency and time-consuming clamping process during processing.
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[0040] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0041] refer to Figure 1 to Figure 10 , the present embodiment provides a molding process of a fire safety valve, the following steps:
[0042] The first step: the raw materials for manufacturing valves are processed to remove impurities, and then put into the smelting electric furnace for melting treatment to form liquid metal. The melting temperature is between 150 degrees Celsius and 250 degrees Celsius;
[0043] Step 2: preheat the mold, the preheating temperature is 200℃~300℃, keep for 30~40 minutes;
[0044] Step 3: Use an air gun to spray compressed air to purge the mold cavity to remove foreign matter in the mold cavity;
[0045] Step 4: Spread a layer of release agent on the inner cavity of the mold: Use an air spray can to evenly spray the release agent for shell making on the cavity of the mold;
[0046] Step 5: pour the liquid metal i...
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Abstract
The invention relates to the field of safety valves, in particular to a molding process for fire safety valves, comprising the following steps: preheating the mold, spreading a layer of release agent on the inner cavity of the mold; Spray the mold release agent for shell making, pour the liquid metal into the mold, and after the pouring is completed, the metal is solidified and formed to obtain the valve ingot, and then polish the obtained valve ingot, then clean the polished surface with acetone, and then let it dry naturally After drying, the surface of the obtained ingot is subjected to sandblasting and roughening treatment, and after sandblasting, the obtained ingot is sprayed with compressed air, and the part blank after heat treatment is drilled by a drilling device, and then milled, Grinding and polishing treatment to get the finished parts, the molding process is simple, the valve strength is high, it is not easy to break after long-term use, the processing time is short, the valve precision is high, and the output is high in mass production.
Description
technical field [0001] The invention relates to the field of safety valves, in particular to a molding process of a fire safety valve. Background technique [0002] The fire safety valve is a kind of safety protection valve. Its opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises and exceeds the specified value, it will automatically open and discharge the medium to the outside of the system. To prevent the medium pressure in the pipeline or equipment from exceeding the specified value, in the manufacturing process of the valve, it is necessary to drill holes in the three directions of the valve inlet, outlet and switch direction, and the ordinary drilling method is inefficient. [0003] At present, Chinese Patent No.: CN201721317864.1 discloses a gate valve fixing seat for a multi-hole combined drilling machine, which includes a bottom plate arranged on the drilling machine....
Claims
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IPC IPC(8): B23P15/00
CPCB23P15/001
Inventor 杨金火
Owner XIANGAN FIRE TECH CO LTD