Bottle with extended neck finish and method of making same
A blow molded synthetic resin bottle has a body and an elongated neck with the body providing a shoulder extending about the base of the neck. The neck has a first collar extending thereabout spaced adjacent the shoulder and at least one additional collar extending thereabout adjacent the upper end of the neck. The resin in the neck is substantially unoriented. To produce the bottle, a synthetic resin preform is injection molded with a generally tubular body and the elongated neck. This preform is placed in a blow mold cavity having a body receiving portion and a neck receiving portion that has a recess extending thereabout seating the first collar therein. The additional collar is disposed outwardly of the mold cavity and is disposed on the upper surface of the mold.
1. A system for blow molding, the system comprising:
a preform, the preform comprising a closed body, an open end, and a neck located between the closed body and the open end, wherein the neck comprises a thread formation proximate the open end, a flange, and a collar proximate to the closed body;
a gripper configured to engage the neck of the preform between the thread formation and the collar; and
a mold, the mold comprising:
a body receiving portion into which the closed body of the preform is positioned during a blow molding operation; and
a neck receiving portion coextensive with the body receiving portion and comprising a circumferential recess, a circumferential seat, and a neck cavity, wherein the circumferential recess has a first width and the neck cavity has a second width that is less than the first width, and wherein during the blow molding operation, the circumferential recess is configured to engage an outer circumference of the collar of the preform with the circumferential seat engaging an outer circumference of the flange, with the flange sitting within the seat on an uppermost surface of the mold so as to leave the thread formation and open end disposed outside of the neck cavity and mold, and with the neck cavity engaging the neck between the collar and the thread formation.
2. The system of claim 1 , wherein the preform further comprises the flange as one of a pair of axially spaced transfer rings located between the thread formation and the collar and wherein the gripper is configured to engage the neck of the preform between the pair of axially spaced transfer rings.
3. The system of claim 1 , wherein the preform further comprises the flange as a single flange and further comprises a groove, both the single flange and the groove being located between the thread formation and the collar such that the groove is located on a same side of the single flange as the thread formation, and wherein the gripper is configured to engage the groove.
4. The system of claim 1 , further comprising a spindle nose configured to engage an interior surface of the neck of the preform.
5. The system of claim 4 , further comprising an oven through which the spindle nose is configured to transport the preform so as to heat the closed body of the preform.
6. The system of claim 5 , wherein the spindle nose is configured to rotate along a longitudinal axis of the preform while the preform is transported through the oven.
7. The system of claim 4 , wherein the preform further comprises the flange located between the thread formation and the collar, wherein the system further comprises an infeed wheel configured to hold the preform on a same side of the flange as the collar, and wherein the spindle nose is configured to remove the preform from the infeed wheel.
8. The system of claim 7 , further comprising a rail system over which the preform is transported to the infeed wheel.
9. The system of claim 1 , wherein the preform further comprises the flange located between the thread formation and the collar, wherein the neck receiving portion of the mold further comprises the circumferential seat positioned such that the neck cavity is located between the circumferential recess and the circumferential seat, and wherein the flange rests on the circumferential seat during the blow molding operation.
10. The system of claim 9 , wherein the circumferential seat has a third width, the second width of the neck cavity being less than the third width.
11. The system of claim 10 , wherein the third width of the circumferential seat is less than the first width of the circumferential recess.
12. The system of claim 1 , wherein during the blow molding operation, the neck receiving portion is configured to engage an entire length of the preform neck that extends from the collar to the flange sitting within the circumferential seat.