METHOD OF MANUFACTURING INJECTION NEEDLE

摘要

An injection needle 1 made of an alloy containing cobalt and molybdenum is manufactured as follows. First, a lancet cut is carried out to a pipe-like metallic material composed of the alloy containing cobalt and molybdenum to form a blade tip 3 and a blade part 5. Then, a distal end part 1A including the blade tip 3 is mechanically polished, and thereafter, the distal end part 1A is immersed in an electrolytic solution and electrolytically polished. Thus, burrs at the blade tip 3 or the like generated during mechanical polishing are removed. Since the injection needle 1 is composed of the alloy containing cobalt and molybdenum, compared to a conventional injection needle made of stainless steel, an injection needle in which the surface roughness of an inner peripheral surface of the injection needle is low and smooth can be provided.

主权项

1. A method of manufacturing an injection needle comprising the steps of:
providing a work piece comprising an alloy containing Co and Mo; molding the workpiece into an elongated cylinder; carrying out a lancet cut on an end of the cylinder to form a blade at the end of the cylinder; and electrolytically polishing the blade to form the injection needle.