Blow molding apparatus
AssigneeDiscma AG
InventorsKenichi Suyama, Mitsuru Shiokawa, Shinichi Tabata
Life of this patent
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Abstract
A pressure is accumulated in advance in a cylinder (35), which is used for conversion to air for the outside of a mouth, with an opening-closing valve (V3) of the cylinder (35) being closed, and when a pressurized liquid (L) is supplied into a preform (PF) through a blow nozzle (13) by actuating a plunger pump (31) and by opening a sealing body (15), the opening-closing valve (V3) of the cylinder (35) is opened to thereby apply the pressure accumulated in the cylinder (35) to the liquid (L) supplied into the preform (PF).
Claims19
A blow molding apparatus that supplies a pressurized liquid into a bottomed tubular preform fitted to a mold used for blow molding and molds the preform into a shape conforming to a cavity of the mold, the blow molding apparatus comprising:
- a blow nozzle fitted to a mouth tubular portion of the preform;
- a sealing body configured to open and close the blow nozzle;
- a pressurized liquid supply unit connected to the blow nozzle via a liquid flow path;
- an accumulator that is in branch connection with the liquid flow path;
- and
- an opening-closing valve of the accumulator that is disposed between the liquid flow path and the accumulator, wherein
- a pressure is accumulated in the accumulator in advance, with the opening-closing valve of the accumulator being closed, and
- when the pressurized liquid is supplied into the preform through the blow nozzle by actuating the pressurized liquid supply unit and by opening the sealing body, the opening-closing valve of the accumulator is opened to thereby apply the pressure accumulated in the accumulator to the liquid supplied into the preform.
Dependencies are inferred from the claim text.