Needle-equipped syringe barrel needle-equipped syringe, and mold and method for molding same
AssigneeDaikyo Seiko, Ltd.
InventorHiroshi Togashi
Life of this patent
Estimating the term…
Abstract
There are provided a needle-equipped syringe barrel and a needle-equipped syringe in which a needle is suitably fixed to a syringe nozzle, and a mold and a method for molding thereof. A metal needle 12 is integrally equipped to a synthetic resin syringe nozzle 113 by integral molding, an area where the needle 12 comes into contact with the nozzle 113 being in a range of 11 to 50 mm2. A needle-equipped syringe barrel 1 in which a metal needle 12 is integrally equipped to a synthetic resin syringe nozzle 113 by integral molding, height of a needle end 122 extruded toward an inner hollow portion thereof opposite to a needle head 121 being in a range of 0.4 to 11 mm.
Claims7
A needle-equipped syringe barrel in which a metal needle of 25 to 34 G in thickness is integrally equipped to a synthetic resin syringe nozzle by integral molding, characterized in that an area where the needle comes into contact with the syringe nozzle falls in a range of 11 to 50 mm2.
A needle-equipped syringe barrel in which a metal needle is integrally equipped to a synthetic resin syringe nozzle by integral molding, characterized in that height of a needle rear end extruded toward an inner hollow portion thereof opposite to a needle head falls in a range of 0.4 to 11 mm.
A mold for molding a needle-equipped syringe barrel comprising an inner mold of a contour corresponding to an interior contour of the inner syringe barrel, in which a concave portion is formed at a tip portion thereof to hold a needle rear end opposite to a needle head, and an outer mold of a contour corresponding to exterior contours of an outer syringe barrel and of an outer syringe nozzle, characterized in that a needle is kept in a region corresponding to a needle head in the outer mold, a needle holder being fitted to elastically push up the needle rear end to the concave portion of the inner mold.
A method for molding a needle-equipped syringe barrel by arranging an inner mold of a contour corresponding to an interior contour of the inner syringe barrel, in which a concave portion is formed at a tip portion thereof to hold a needle rear end opposite to a needle head, in an outer mold of a contour corresponding to exterior contours of the outer syringe barrel and of an outer syringe nozzle, characterized in that a needle is kept in a region corresponding to a needle head and the needle rear end opposite to a needle head is pressed to the concave portion of the inner mold so as to prevent a material to be injection molded from flowing into a capillary of the needle through the needle rear end.
Dependencies are inferred from the claim text.