Method and device for processing preforms
AssigneeHusky Injection Molding Systems Ltd.
InventorModesto M. Pesavento
Life of this patent
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Abstract
A method and a device for processing preforms which are made of a thermoplastic plastic material and are blow molded into containers. In a first production process, the preforms are produced by injection molding in the area of an injection molding tool. At least some areas of the preforms are impinged upon by a cooling device. The preforms are deformed by applying negative pressure, wherefore the cooling device can be made at least in part of a porous material.
Claims42
A method for processing an injection molded thermoplastic preform, comprising the steps of:
- injection molding the preform;
- receiving the preform in an insert having a surface defining a cavity that is configured to substantially correspond to a length of an external portion of the preform received within the insert, wherein at least a portion of the surface of the insert comprises a porous material;
- and
- deforming the received preform by the action of negative pressure applied to the insert by extracting the air present between the surface of the insert and the preform through the porous material such that ambient pressure acting within the internal space of the preform presses an external portion of the preform against the surface of the insert.
A device for processing an injection molded thermoplastic preform, comprising:
- an insert having a surface defining a cavity that is configured to substantially correspond to the length of an external portion of the preform received therein;
- and
- at least a portion of the surface of the insert comprising a porous material for deforming the received preform by the action of negative pressure through the insert by extracting the air present between the surface of the insert and the preform through the porous material such that ambient pressure acting within the internal space of the preform presses the external portion of the preform against the surface of the insert.
A method for processing an injection molded thermoplastic preform, comprising the steps of:
- injection molding the preform;
- receiving the preform on a mandrel with an internal portion of the preform on a surface of the mandrel, wherein at least a portion of the surface of the mandrel comprises a porous material;
- and
- deforming the received preform by the action of negative pressure applied through the porous material to draw a preform portion into contact therewith.
A device for processing an injection molded thermoplastic preform, comprising:
- a mandrel having a surface for receiving an internal portion of the preform;
- at least a portion of the surface of the mandrel comprising a porous material configured to deform the received preform by negative pressure applied through the porous material to draw a preform portion into contact with said surface;
- and
- the mandrel includes a seal for sealing the preform portion therein to prevent the intake of ambient air when negative pressure is applied.
Dependencies are inferred from the claim text.