Atmospheric pressure (dry air or inert gas) of about 0.01-0.08 MPa is applied to the liquid surface of the sealed aluminum liquid,and the aluminum liquid raises along a pipe (riser pipe) placed in the aluminum liquid and flows into the upper mold of the holding furnace.In the mold,when the aluminum liquid is completely solidified from the upper portion of the mold to the gate,the aluminum liquid in the riser pipe flows back,and the mold is opened to take out the casting.
Low pressure casting machine advantages Low pressure casting machine disadvantages
Solidification under pressure,product structure is dense and the quality is good.
Casting precision is high and high process yield.
The metal has good fluidity,the casting has clear outline and the surface is smooth.
No feeder,flow gate is small,reducing remelt of feeder and flow gate,saving energy.
The sand core and other materials can be placed in the mold cavity,which has wide practicality.
The size of the product is basically unlimited for the machine and the mold.
The equipment is mechanized and highly automated.
Filling and cooling time is long,casting circle is long.
Casting wall thickness needs over 3mm.
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