| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize and simplify a molten-metal injecting sleeve and a plunger to improve a yield of die-cast products. SOLUTION: A metallic mold 6 for die-cast molding is provided with a flow dividing dam 17 around the vicinity of a cavity inlet 8a and provided with a catching cavity 18 around the flow dividing dam 17. The cavity inlet 8a is formed so as to be almost blocked with a plunger front-end part 16a, and a pressurizing plunger 27 is provided so as to be projectable and retractable in a product cavity 8. Molten metal injected from an injecting sleeve 15 collides with the flow dividing dam 17 and is divided into an impurity layer and a clean layer. The divided clean layer is directly poured into the product cavity. The divided impurity layer is caught by the catching cavity. After the cavity inlet 8a is almost blocked with the plunger front-end part 16a, when the poured clean layer begins to solidify, the pressurizing plunger is projected into the product cavity 8 to pressurize the clean layer. COPYRIGHT: (C)2005,JPO&NCIPI
|
