Liquid blow molding apparatus and liquid blow molding method
AssigneeDiscma AG
InventorsShinichi Tabata, Mitsuru Shiokawa
Life of this patent
Estimating the term…
Abstract
A liquid blow molding apparatus for liquid blow molding a resin preform into a container having a prescribed shape. The apparatus includes a blow molding mold in which the preform is disposed; a blow nozzle that engages in an opening of the preform; a pressurized liquid supply that supplies a pressurized liquid to a supply path that is connected to the blow nozzle; and a seal member that is provided inside the supply path and opens and closes the supply path with respect to the blow nozzle. The pressurized liquid supply is configured to start supplying the pressurized liquid to the supply path after the seal member has begun to open.
Claims13
A liquid blow molding method for forming a resin preform into a container having a prescribed shape, the liquid blow molding method comprising the steps of:
- disposing a preform in a blow molding mold, the preform having an open end with a tubular body extending therefrom to a closed end,
- fitting a blow nozzle into the open end of the preform,
- supplying a pressurized liquid to a supply channel connected to the blow nozzle at a first pressure, and
- at a first point of time during the blow molding method, moving a seal member in the supply channel from a closed position to an open position establishing an open condition of the supply channel with respect to the blow nozzle;
- and,
- at a second point in time during the blow molding method, the second point in time being after the first point in time, and after initiating the moving of the seal member to the open position has started, starting injection of the pressurized liquid with the pressurized liquid at the first pressure and increasing the pressure of the pressurized liquid supplied to the supply channel from the first pressure to a forming pressure for forming the preform into the container.
Dependencies are inferred from the claim text.