Preform and a mold stack for producing the preform

摘要

Disclosed is a preform (300) suitable for subsequent blow-molding into a final-shaped container. The preform comprises a neck portion (302); a gate portion (306); and a body portion (304) extending between said neck portion and said gate portion; the gate portion including an upwardly-bound region (324) defined between the inner and outer walls thereof, substantially whole of the upwardly-bound region extending in a direction towards the neck portion (302).

主权项

1. An injection molded preform suitable for subsequent blow-molding into a final-shaped container, the preform comprising:
a neck portion; a gate portion having a substantially constant thickness; and a body portion extending between said neck portion and said gate portion; wherein the gate portion is implemented as either a conical form or a semi-spherical shape extending between the body portion and a lower-most extremity; and the gate portion further comprises an upwardly-bound region of a semi-spherical or conical shape extends upwardly from the lower-most extremity towards the neck portion, whole of the upwardly-bound region extending in a direction towards the neck portion; wherein the upwardly-bound region includes an outer planar surface of a gate vestige at an apex thereof wherein the upwardly-bound region is blow moldable to form an upwardly-bound container region of the container.