Note the use of the machine lost foam casting castings

     Machine tool castings using sand casting lost foam or resin, when casting machine in the casting should note the following:
    A possible choice antes package. Small antes package liquid metal heat loss, big head, casting speed, scum floating on the surface of the molten metal pouring molten steel is relatively clean. By equipment constraints, some less demanding or generally small subcontract pouring casting machine can also be used.
    Second, the casting process can not be interrupted. When LFC casting casting, must remain continuously injected into the molten metal until the entire mold is filled. Otherwise, it could easily lead to cold shut casting defects in the entire plane at a standstill.
   Third, at the beginning of the casting, particularly new to instant foam liquid metal, a lot of gas due to the appearance of the material produced by gasification, when sprues not full or just start pouring molten metal static head exploded less than polystyrene When the gas pressure product, pouring too quickly choke fire phenomenon is easy to produce, so that the molten metal splash. To avoid this, in the beginning of the casting machine casting can take the first trickle slowly pouring method, until the system is filled with liquid metal pouring, the casting speed can increase the sooner the better, but the gate is a metal cup filled without the spill as a criterion. In the late casting casting machine, when the liquid reaches the top of the metal pattern or riser roots, it should be slightly closed package need to keep the metal rises smoothly and does not cause the molten metal out of the riser.  http://www.cnwxyszj.com 

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Stainless steel castings