Method for low-pressure casting thin-wall long-sized castings and equipment used by same

A low-pressure casting, long-size technology, applied in the field of low-pressure casting methods and the equipment used, can solve the problems of complex design of the mold gating system, poor exhaust, cold insulation joints, etc., so as to reduce labor intensity of workers and reduce pouring risers. , Good product forming effect
CN102642009AActive Publication Date: 2012-08-22烟台路通精密科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
烟台路通精密科技股份有限公司
Publication Date
2012-08-22

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Abstract

The invention relates to a method for low-pressure casting thin-wall long-sized castings and equipment used by the same, wherein metal materials are firstly smelted, a furnace body is closed, a mould is prepared, dry compressed air is filled into an airtight container, under the action of gas pressure, liquid metal rises along a multitube and multi-sprue riser tube and stably enters a mould cavity through a sprue, and the gas pressure on the liquid level in a crucible is kept; and after the casting is completely solidified, the gas pressure on the liquid level is relieved to enable the unsolidified liquid metal in the riser tube to flow back into the crucible, and then the casting is taken out. The method for producing the thin-wall long-sized casting has the advantages that mold-filling is stable, a product is well molded, the mold-filling of liquid metal is carried out under the pressure, the liquid metal has good liquidity and is convenient to cast the thin-wall casting of the kind the casting is crystallized and solidified under the pressure and has a compact structure, so the mechanical property is improved, a pouring system is simple, casting heads are reduced, mechanization and automation are realized, the labor intensity of workers is reduced, a mould with multi-cavities is realized, the production efficiency is improved and the like.
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Description

technical field

[0001] The invention relates to a low-pressure casting method and equipment used therefor, in particular to a low-pressure casting method for thin-walled and long-sized castings and the equipment used therein. Background technique

[0002] The current casting method of thin-walled and long-sized castings in foundries is gravity casting. Gravity casting refers to the process of injecting molten metal into the mold under the action of gravity of the earth. Gravity casting is prone to problems such as insufficient pouring, pores, shrinkage, slag holes, deformation, cold seal marks, poor exhaust, and complex design of the mold gating system. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a low-pressure casting method for thin-walled and long-sized castings and the equipment used therein, so as to overcome the lack of pouring, air holes, shrinkage, slag holes, and deformation caused by gravity casting...

Claims

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