Patent ID: 6206080
Filing Date: 2001-03-27
Classification: B22D

Abstract:
A die casting apparatus for a rotor comprising a stationary die plate in which an insert having a main passage of molten metal and a plurality of bores is mounted, an intermediate die plate in which a plurality of first molds are mounted and for closing off one end of the stationary die plate, a movable die plate in which a plurality of sleeves receiving laminated core members and a plurality of second molds are mounted, the movable die plate being axially separable in abutment with the intermediate die plate, and an extracting plate located axially movably between the stationary die plate and the intermediate die plate and for extracting metal scrap after die casting, being characterized in that:a plurality of locators which are fixed into bores formed on the insert of the stationary die plate and inserted inside each laminated core member are provided so as to prevent an inner diameter of the laminated core member from being deformed, andsaid first mold includes an annular inner wall and an annular outer wall projected against an opposite surface of the intermediate die plate facing the movable die plate for inserting the walls into the sleeve;an annular first cavity formed between the annular inner wall and the annular outer wall;a plurality of sprues penetrated from an upper surface of the first mold to the first cavity; anda plurality of gates extended from the sprues and protruded from a bottom portion of the annular first cavity.