Method and system for molding of a container
AssigneeDiscma AG
InventorsPankaj Kumar, G. David Lisch, Kirk E. Maki, Robert A. Cooper
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Abstract
A method and molding system for hydraulic blow molding of a container from a preform. The method precharges the molding medium within a fill head unit to a precharge pressure. During the injecting of the molding medium into the preform, the method further increases the pressure of the molding medium to a pressure greater than the precharge pressure.
Claims21
A method of operating a molding system for hydraulic blow molding of a container from a preform, the molding system including a fill head unit, the method comprising the steps of:
- providing a molding medium in liquid form and at a system pressure to the fill head unit;
- precharging the molding medium within the fill head unit to a precharge pressure, the precharging pressure being greater than the system pressure;
- and
- after precharging of the molding medium, injecting the molding medium from the fill head unit into the preform causing the preform to expand into the shape of the container under the influence of the molding medium.
A molding system for hydraulic blow molding of a container from a preform, the molding system comprising:
- a fill head unit, the fill head unit including a pressurization unit coupled to a nozzle assembly and to a source of molding medium in liquid form, the nozzle assembly further including a nozzle body with a seal pin slideably received within the nozzle body and being moveable between an opened position and a closed position, in the closed position an outlet of the nozzle body being closed by the seal pin;
- a mold assembly having mold halves defining a mold cavity in the shape of the container, the mold assembly being configured to receive the preform therein;
- and
- a controller coupled to the fill head unit, the controller being configured to raise the pressure of the molding medium in the fill head unit to a precharge pressure prior to injection of the molding medium into the preform and with the seal pin in the closed position.
Dependencies are inferred from the claim text.