Mold assembly having a pressure reducing device
AssigneeAdvanced Plastics Technologies Luxembourg S.A.
InventorsGerald A. Hutchinson, Robert A. Lee, Heinrich K. Feichtinger
Life of this patent
Estimating the term…
Abstract
Disclosed is a preferred mold design for producing plastic, molded preforms, which may be blow-molded into a container of a final, desired shape. A preferred mold includes a temperature control system for maintaining the preform mold at a desired temperature. The temperature control system can pass fluid through channels within the preform mold to cool plastic that is injected into the preform mold. In some arrangements, a mold comprises a neck finish mold, the neck finish mold comprising high heat transfer material positioned to transfer heat away from melt within a mold cavity of the mold.
Claims26
A mold comprising:
- a core section having a core surface;
- a cavity section having a cavity surface, a mold cavity being defined by the core surface and the cavity surface when the mold is in a closed position;
- at least one fluid channel being disposed within one of the core section and the cavity section;
- and
- a pressure reducing device in fluid communication with the fluid channel, the pressure reducing device being configured to receive and at least partially vaporize a volume of a refrigerant.
A mold assembly comprising:
- a core section;
- a cavity section, a mold cavity being defined by the core section and the cavity section when the mold assembly is in a closed position;
- and
- a temperature control system configured to transfer heat away from the mold cavity, the temperature control system comprising:
- at least one fluid channel located within one of the core section and cavity section;
- and
- a pressure reducing device in fluid communication with the fluid channel, the pressure reducing device being configured to receive a volume of a refrigerant and to at least partially reduce a pressure of the refrigerant to an outlet pressure equal to or less than a vaporization pressure of the refrigerant.
Dependencies are inferred from the claim text.