B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/73
B22D 17/10 (2006.01) B22D 17/20 (2006.01)
Patent
CA 1217619
METALLIC MOLD FOR DIE-CASTING Abstract of the Disclosure The metallic mold for die-casting comprises a stationary die having a biscuit portion receiving molten metal for die- casting and branched runners connected to the biscuit portion so as to receive the molten metal from the biscuit portion, an intermediate die having a plurality of pin runners there- through at positions spaced apart from each other with the proximal ends thereof aligned with the distal ends of the branched runners, respectively, and a movable die having a plurality of mold cavities to form a multiple-cavity die or a mold cavity for a large sized die-cast product, the constricted distal ends of the pin runners being opened into the mold cavities or the mold cavity at positions spaced apart from each other so as to insure the even dis- tribution of the molten metal in the mold cavities or the mold cavity thereby permitting a high quality of die-cast products to be achieved. In order to positively prevent the solidified metal in the pin runners from being-stuck and held at the side of the intermediate die when the intermediate die is moved apart from the stationary die after die-casting, an arresting undercut is formed in the distal end each of the branched runners aligned with the respective proximal end of the pin runner so that the metal remaining in each of the arresting undercut integrally solidifies with the metal in the respective pin runner after die-casting operation to generate an arresting force tending to hold the metal solidified in the pin runners at the side of the stationary die thereby preventing disadvantages which might occur when the metal solidified in the pin runners is held stuck to the side of the intermediate die necessitating trouble- some and time consuming operations for removing such stuck metal by stopping the die-casting production line.
464369
Fukui Shokoh
Furumaki Naoyuki
Kawai Toshiyuki
Miki Isao
Mori Hiroaki
Nippon Light Metal Co. Ltd.
Westell & Hanley
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