Process of making brake rotors

B - Operations – Transporting – 22 – C

Patent

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Details

B22C 1/00 (2006.01) B22C 9/00 (2006.01) B22C 9/10 (2006.01) B22D 25/00 (2006.01)

Patent

CA 2352238

An apparatus and method for casting dimensionally predictable brake rotors is provided. The apparatus includes a first mold portion (12), or cope/ram half, and a second mold portion (16), or drag/swing half, movable relative to each other. The first mold portion (12) and the second mold portion (16) define a mold cavity (14) for casting the brake rotor (24). A fin core (20) is then provided and positioned in the mold cavity (14) for forming a plurality of cooling fins on the brake rotor (24). The fin core (20) is made of a silica sand and carbon sand mixture, wherein the carbon sand is a crushed calcined petroleum coke.

Cette invention se rapporte à un appareil et à un procédé servant à couler des disques de frein aux dimensions prévisibles. Cet appareil comprend une première partie de moule (12) ou demi-moule du type chape/piston, et une seconde partie de moule (16) ou demi-moule de type fond/carrousel, mobiles l'une par rapport à l'autre. La première partie de moule (12) et la seconde partie de moule (16) forment une cavité de moule (14) dans laquelle est coulé le disque de frein (24). Un noyau à ailettes (20) est ensuite placé dans la cavité de moule (14) de façon à former plusieurs ailettes de refroidissement sur le disque de frein (24). Le noyau à ailettes (20) est fait d'un mélange de sable de silice et de sable de carbone, le sable de carbone étant constitué par du coke de pétrole calciné broyé.

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