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    Gravity casting and foundry casting Comparison
    Author:admin  Update:2009-8-28  Hits:5715  

     

     

    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 )

    2%~3%

    6%~8%

     

    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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