Other

Sumitomo Electric Industries, Limited

Nippon Light Metal Company, Ltd.

Masahide Hamada

Yoshiki Matsuzaki

Masayuki Yasuda

Kaoru Sugita

Nobuyuki Shimizu

Tetsuo Ishikawa

Yoshihiro Tajima

A controlling member (a controlling pin ) is inserted through an insertion hole of a mold and projected into a cavity . After a pipe P as an insert member is arranged at a predetermined position in the cavity , the pipe P is held in the cavity by inserting a tip of the controlling pin into a hole h of the pipe P at the end p , or by inserting the end p of the pipe P into a cave of the controlling member. A molten aluminum alloy is then poured through a gate into the cavity under such the condition, to enclose the pipe P with the aluminum alloy. Dislocation of the pipe P caused by kinetic and thermal energies of the poured aluminum alloy is suppressed by the controlling pin or block at the end p . Since the enclosed pipe P has its end p opened at a predetermined position, a cast product obtained in this way can be used as a brake caliper or the like having an inner hydraulic circuit.

Internal chill casting method for manufacturing a cast product containing a pipe therein

If cylinder bores formed in a caliper parallel to each other are communicated together through a pipe casted in the caliper, the pipe tends to come out of the caliper into a cylinder bore. A separate short pipe is provided to communicate the cylinder bores. The pipe has an engaging portion so as to extend in a diametric direction of the short pipe to prevent longitudinal shift of the short pipe. The engaging portions can be provided easily by forming a recess or a protrusion on the outer periphery of the pipe and casting the pipe in the caliper.

Multipot type disk brake

Growing community of inventors

Itami, Japan

Masahide Hamada