Bottomed cylindrical metallic member and method of producing the same

摘要

There is provided a bottomed cylindrical metallic member that prevents a product from being caught by a shoulder corner of a die, or from being caught by a root corner of the bottomed cylindrical metallic member when the product is removed from the die. The bottomed cylindrical metallic member includes: an outer tube made of metal; and an inner tube made of metal installed inside the outer tube, the inner tube provided thereinside with a cooling hole configured to be a bottomed hole having a bottom at a front end of the inner tube. The inner tube includes: a thick-walled portion that extends from an aperture formed at a base end side of the inner tube to a vicinity of a shoulder corner of a die that meets a cavity corner when the bottomed cylindrical metallic member is mounted to the die, and further extends inside a shoulder of the die projecting from the die toward the cavity, or to a vicinity of a root corner of the bottomed cylindrical metallic member that meets the cavity corner when the bottomed cylindrical metallic member is mounted to the die, and further extends inside the cavity; and a thin-walled portion continuously extending from the thick-walled portion to the bottom formed at the front end side of the inner tube. Fig. 2