Post-mold preform receptacle and a post-mold treatment device
View Patent ↗Embodiments of the present invention teach a post-mold treatment device and post-mold preform receptacle for use therewith for a post-mold treatment of a preform having a bell-shape. More particularly, an upper portion of a receptacle cavity associated with the post-mold preform receptacle is configured to have the same shape as the transition portion of the preform, and the upper portion is further configured to have a transition-fit size with respect to the transition portion of the preform at the instant that the preform is received from the molding cavity of the injection mold.
1. A combination of a post-mold preform receptacle for treatment of a preform received therein in accordance with a balanced cooling rate post-mold treatment process and the preform, the preform having a bell-shape that includes a transition portion connecting a neck finish portion with a body portion, the post-mold preform receptacle comprising:
a body that defines a receptacle cavity for accepting, in use, the transition portion and the body portion of the preform;
a lower portion of the receptacle cavity being configured to have the same shape as the body portion of the preform, and the lower portion being further configured to have a body-interference size (I) with respect to the body portion of the preform at an instant that the preform is received from a molding cavity of an injection mold;
an upper portion of the receptacle cavity being configured to have the same shape as the transition portion of the preform, and the upper portion being further configured to have a transition-fit size, with respect to the transition portion of the preform at the same instant that the preform is received from the molding cavity of the injection mold whereby there is contact between the transition portion and the upper portion, wherein the upper portion defines a space that is slightly dimensionally smaller than the transition portion of the preform at an instant that the preform is first received after ejection from the molding cavity of the injection mold.
2. The post-mold preform receptacle of claim 1 , wherein
the post-mold preform receptacle further includes channel for a controllable circulation, in use, of a coolant for regulating a first cooling rate associated with at least the transition portion of the preform to effect a balancing of the first cooling rate with respect to a second cooling rate associated with at least one of:
the neck finish portion of the preform; and
an interior portion of the preform.
3. The post-mold preform receptacle of claim 2 , wherein:
the post-mold preform receptacle further defines a closed-end portion of the receptacle cavity for receiving, in use, a domed-end portion of the preform, and wherein the closed-end portion is typically configured to have the same shape and size as a portion of the injection mold that corresponds to the domed-end portion of the preform.
4. The post-mold preform receptacle of claim 3 , wherein:
the post-mold preform receptacle is an assembly of a tube member and an insert member received therein, and wherein the upper portion and the lower portion of the receptacle cavity are defined on inner surfaces of the tube member and the closed-end portion is defined on the insert member, and that the channel is associated with the tube member.
5. The post-mold preform receptacle of claim 1 , wherein:
the transition-fit size is selected to include an inward offset that ranges between 0 and 50%.
6. The post-mold preform receptacle of claim 5 , wherein:
the transition-fit size is selected to include the inward offset of about 20%.
7. A post-mold treatment device including the post-mold preform receptacle of claim 1 .