Preform and a Mold Stack for Producing the Preform
AssigneeHusky Injection Molding Systems Ltd.
InventorsJean-Christophe WITZ, Bruce Clive Dearling, Laurent Christel Sigler
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Abstract
According to embodiments of the present invention, there is provided a preform and a mold stack for producing the preform. For example, there is provided a preform suitable for subsequent blow-molding. The preform comprises a neck portion; a gate portion; and a body portion extending between said neck portion and said gate portion; the gate portion being associated with a substantially conical shape. In an example embodiment, the substantially conical shape is selected such that to substantially homogenize angle of refraction of rays used during a re-heating stage of a blow-molding process.
Claims26
A preform suitable for subsequent blow-molding comprising:
- a neck portion;
- a gate portion;
- and
- a body portion extending between said neck portion and said gate portion;
- the gate portion being associated with a substantially conical shape.
A mold stack comprising:
- a core insert for defining an internal surface of a preform;
- a split mold insert pair for defining an external surface of a neck portion of the preform;
- a cavity insert for defining the external surface of a body portion of the preform;
- a gate insert for defining the external surface of a gate portion of the preform;
- the core insert and the gate insert being configured to cooperate, in use, to define the gate portion of the preform having a first substantially conical shape.
A core insert for defining, in use, a portion of a preform, the preform including a neck portion, a gate portion and a body portion extending therebetween, the core insert comprising:
- a first cavity defining portion having a gate defining portion which has substantially conical shape, the substantially conical shape so selected such that to substantially homogenize angle of refraction of rays used during a re-heating stage of a blow-molding process of the preform within the gate portion.
A gate insert for defining, in use, a portion of a preform, the preform including a neck portion, a gate portion and a body portion extending therebetween, the gate insert comprising:
- a second cavity defining portion having a substantially inverted conical shape, the substantially inverted conical shape so selected such that to substantially harmonize angle of refraction of rays used during a re-heating stage of a blow-molding process of the preform within the gate portion (306, 406, 906.
A method of producing at least a portion of a mold stack comprising:
- selecting a shape for a gate portion of a preform suitable for blow-molding, the shape so selected as to at least substantially homogenize angle of refraction of at least some of a set of rays during re-heating stage of a blow-molding process;
- manufacturing the at least a portion of the mold stack to include the shape.
A preform suitable for subsequent blow-molding comprising:
- a neck portion;
- a gate portion;
- and
- a body portion extending between said neck portion and said gate portion;
- the gate portion being associated a shape so selected such that to substantially homogenize angle of refraction of rays used during a re-heating stage of a blow-molding process.
Dependencies are inferred from the claim text.