Metal deforming – By extruding through orifice – With cutting
Patent
1987-09-22
1989-11-28
Larson, Lowell A.
Metal deforming
By extruding through orifice
With cutting
72264, 72334, 72344, 72356, 72354, B21C 2314, B21D 2828, B21D 4506, B21K 2112
Patent
active
048829242
ABSTRACT:
A method for manufacturing a hollow tape guide for guiding magnetic recording tape. In this method, a round rod-like metal wire is sheared by shearing cutters into a blank a predetermined length, having a first end and a second end. Then, the blank is shaped and made into a blank having a shallow recess in the second end. The blank is then extruded and made into a cup-shaped blank closed at the first end by a bottom and having a predetermined length and a predetermined wall thickness. Finally, the bottom of the cup-shaped blank is punched out, thereby providing a hollow tape guide. The bottom is thick when the rod-like blank is too long, and is thin when the rod-like blank is too short, so that the cup-shaped blank may have the desired length and desired wall thickness.
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Kohama Takayuki
Kojima Hideo
Larson Lowell A.
Sanshin Industry Co., Ltd.
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