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Gravity casting and foundry casting Comparison
Author:admin  Update:2009-8-28  Hits:6290  



Gravity Die Casting

 Foundry Casting

Area under the equal production quantity

About 100

About 500


Temperature of pouring


950 degree


1050 degree

loss of copper (exclusive of recycle part )




proportion of sprue ( finished casting and proportion of pouring)


4:1 to 5:1 and sprue  is small


2:1 to 1:1, and sprue is large




Quality of product

Casting thickness is uniformity, high density, the surface of inside and outside  is smoothly, consistent  overall dimensions, finishing fast, high polishing & machining efficiency

To have slag on casting products the surface is roughness of both inside and outside, different overall dimensions, low efficiency on machining & polishing, consumption of materials and time-consuming & material consuming



Rate of good products

92% ~ 98% high pass rate (refer to placing sand core), the yield is higher if there is no sand cores in casting products



High reject rate





Labor efficiency

Only7 persons (90KW frequency furnace, two sets of sand core blower machine, 2sets of gravity casting machine, one set of mix sand machine,

staff:: sand core machine 2persons, Gravity casting 3persons,Edge Finish 2persons) , can be die-casted 900-1200pcs per 8 hours





Above 14 persons


State of pollution

Gravity Casting lower pouring temperature required & less pollution

Coal & oil furnace has air pollution during melting process


State of operation

 Easy operation with only two hours training don’t need to  have deep technology

Skilled technical requirements

 High physical exaction

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