PURPOSE: To reduce wear and extend life by forming a part of a sewing, machine part such as a rotating hook, a rotating hook bobbin case holder, and a looper of an injection molding of a mixture of the powder of a material having high hardness and wear resistance with a synthetic resin, and the remainder of the synthetic resin.
CONSTITUTION: A rotating hook bobbin case holder 1 to be installed to a rotating hook, which is used in a vertical fullrotating hook, has a cylinder part 7, a truck 8 formed on the outer circumference, a flange part 10 having a rotating hook bobbin case holder position bracket recessed part 9 formed on the opened-side end part of the cylinder part 7, and a bottom part 11 formed on the other end part of the cylinder part 7. The truck 8 of the rotating hook bobbin case holder 1 is fitted to a truck groove formed on the outer circumferential surface of the rotating hook. A part 17 on the side having a needle location hole 16 of the rotating hook bobbin case holder 1 is divided from the other part 19 by a horizontal cut surface 18 parallel to the axial line of the rotating hook bobbin case holder 1. The part 17 is formed by mixing one or a plurality selected from metal powders and ceramic powders with a synthetic resin followed by injection molding, and the other part 19 is formed of a synthetic resin.
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JPH03500328A | 1991-01-24 | |||
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