US 11,999,084 B2
Rotary injection molding apparatus for producing plastic components such as syringes
Brian Cain, Elizabeth, PA (US); Matthew Schrauder, Mars, PA (US); Theodore B. Lemke, Saukville, WI (US); and Randy J. Krell, West Bend, WI (US)
Assigned to BAYER HEALTHCARE LLC, Whippany, NJ (US)
Appl. No. 16/334,463
Filed by BAYER HEALTHCARE LLC, Whippany, NJ (US)
PCT Filed Sep. 25, 2017, PCT No. PCT/US2017/053241
§ 371(c)(1), (2) Date Mar. 19, 2019,
PCT Pub. No. WO2018/063988, PCT Pub. Date Apr. 5, 2018.
Claims priority of provisional application 62/400,413, filed on Sep. 27, 2016.
Prior Publication US 2020/0094454 A1, Mar. 26, 2020
Int. Cl. A61M 5/31 (2006.01); A61M 5/178 (2006.01); A61M 5/315 (2006.01); B29C 45/00 (2006.01); B29C 45/06 (2006.01); B29C 45/16 (2006.01); B29C 45/26 (2006.01); B29L 31/00 (2006.01)
CPC B29C 45/0046 (2013.01) [A61M 5/178 (2013.01); A61M 5/3129 (2013.01); A61M 5/31515 (2013.01); B29C 45/0025 (2013.01); B29C 45/062 (2013.01); B29C 45/1618 (2013.01); B29C 45/164 (2013.01); B29C 45/261 (2013.01); A61M 2207/00 (2013.01); A61M 2207/10 (2013.01); B29C 2045/0027 (2013.01); B29L 2031/7544 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A syringe comprising:
a barrel having a proximal end, a distal end, and a sidewall extending substantially circumferentially between the proximal end and the distal end along a longitudinal axis;
a drip flange extending radially outward from the barrel, the drip flange having a pair of protrusions protruding axially relative to the drip flange and extending radially from an edge of the drip flange to the sidewall along at least one of a top surface and a bottom surface of the drip flange; and
a pair of gate marks each formed on one of the pair of protrusions on the drip flange,
wherein the barrel is formed from an injection molding process comprising:
aligning a mold die defining an internal shape of the barrel in a molding cavity defining an external shape of the barrel, the molding cavity defined by a first mold section and a second mold section, each mold section comprising a gate adapted to control flow of a molding material into the molding cavity, the gate of the first mold section located diametrically opposite the gate of the second mold section within the molding cavity;
supplying a first melt stream of the molding material to the gate of the first mold section, and supplying a second melt stream of the molding material to the gate of the second mold section; and
opening the gate of the first mold section and the gate of the second mold section to permit the molding material from the first melt stream and the second melt stream to fill the molding cavity surrounding the mold die, wherein the molding material takes a shape of the molding cavity, and
wherein a first of the pair of gate marks is formed on the drip flange at a location of the gate of the first mold section and a second of the pair of gate marks is formed on the drip flange at the location of the gate of the second mold section.