METHOD FOR PRODUCING HYPODERMIC NEEDLE, AND HYPODERMIC NEEDLE

摘要

A method for producing a hypodermic needle involves a step for forming a piercing surface on one end of a metal needle shaft using wire electric discharge machining, and a polishing step for polishing the piercing surface by subjecting the needle shaft on which the piercing surface is formed to ion-etching in a vacuum environment, wherein burrs formed on the needle shaft when forming the piercing surface are polished using ion-beam irradiation. The polishing step involves: immobilizing a hypodermic needle, on which a piercing tip is formed, using an immobilizing tool for immobilizing one end of the needle shaft, in a vacuum furnace; irradiating with an ion beam using plasma ions in a vacuum environment; and at least polishing the needle shaft that includes the piercing tip. The present invention makes it possible to easily and efficiently produce a hypodermic needle and improve producibility, and furthermore, to make the piercing tip sharper and reduce the wound and pain caused by piercing.