| 摘要 |
FIELD: medicine. ^ SUBSTANCE: group of inventions relates to veterinary and can be used for vaccination, blood intake and infusion. Injection needle contains body in form of tube with base at the end and with sharply grinded working end. End has clipping cutting edge in form of complete turn of spiral line. Ends of spiral line are connected with cutting edge in form of segment which is parallel to tube axis and equals turn height. End with tube base is inserted into syringe cannula with piston. Method of injection needle manufacturing includes operation of cutting out work-piece for needles, thermal processing, rolling in rollers to standard diametre, welding with longitudinal joint, cutting in accordance with needle length and grinding of cuts of not less than two cutting edges. Cutting out work-piece and further operation of grinding of cutting and clipping edges are carried out for one needle on work-piece evolvent in form of trapezoid. Cutting and clipping edges are formed simultaneously with formation of needle tube diametre. ^ EFFECT: ensuring gradual growth of pressure in cylinder canal of needle, which is transmitted into syringe with operating motion of piston. ^ 6 cl, 2 dwg |
