초록 ▼

(PURPOSE) To cast plural products in one mold at the same time by forming a sprue and a runner with sand mold or metallic mold and setting plural trees of ceramic mold containing a part of the runner to opening part of the runner with patterns made of wax and the other, which can be removed. (CONSTI

(PURPOSE) To cast plural products in one mold at the same time by forming a sprue and a runner with sand mold or metallic mold and setting plural trees of ceramic mold containing a part of the runner to opening part of the runner with patterns made of wax and the other, which can be removed. (CONSTITUTION) A lower runner mold 1 formed with the sand mold having the sprue 1a at bottom part and the runner 1b at upper opening side of the sprue 1a and an upper runner mold 2 formed with the sand mold having funnel- shaped four runners 2b are superposed. Then, the ceramic is applied on the wax pattern 3 connecting the product patterns 3c at every three places on outer circumference of a supporting mold 3b to be a part of the runner having tapered part 3a with the runner 2b to form the mold. Successively, by burning this at the prescribed temp., the tree type ceramic mold 4 is set as standing- state. Then, molten metal is cast with low pressure casting method and the four products are cast at the same time.

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