PURPOSE: To obtain the product of good quality with ease and efficiently by providing a flat plate which has opening rates of a specified range, is non-melting with product material and is of a high melting point between the product of a casting mold and cross gate portion and isolating the cross gate portion by pressing, etc.
CONSTITUTION: A punching metal 3 which has opening rates (preferably 40W70%) of the specified range, does not melt with molten metal and is higher in melting point than molten metal is interposed between the product portion 1 and cross gate portion 2, and casting is accomplished. Pressure P is applied at a right angle to the axial direction between the product portion of the casting having been cast and the cross gate portion or torsional torque is given thereto. Since the product portion and cross gate portion are coupled by only the opening portions of the flat plate, the cross gate may be removed in a shorter than and more readily as compared to conventional methods, and no adverse influences such as distortions, etc. are given to the products.
OGAWA MASAHIRO
SASANOUCHI MASAYUKI
| JPS5119618U | 1976-02-13 | |||
| JPS5116020A | 1976-02-09 | |||
| JP38010255A | ||||
| JP44005606A |