Blow molding apparatus
AssigneePhillips Petroleum Company
InventorDonald L. Peters
Life of this patent
Estimating the term…
Abstract
An apparatus for blow molding including a blow mold having mold halves which are relatively movable and receive a parison therebetween. A mandrel is carried by portions of the mold and is movable between an extended position and a retracted position. The mandrel has a free end with a vacuum surface area portion with the end being engageable with the parison when the mandrel is in its extended position. A blow needle is reciprocably mounted in the mandrel and insertion of same into the parison is facilitated by the parison being held against the end of the mandrel by vacuum.
Claims6
A blow molding apparatus comprising:
- a. means forming a blow mold with relatively movable mold portions, and having a cavity for forming a blown article;
- b. a mandrel cooperating with portions of said mold forming means and having a free end positioned in said cavity, the mandrel is movable between an extended position and a retracted position, said free end has a vacuum surface area portion adapted for selective engagement with a portion of a parison;
- and
- c. a blow needle reciprocably mounted in said mandrel and selectively moveable between a first position for puncturing the parison and a second retracted position, said blow needle is movable independently of said mandrel.
A blow molding apparatus comprising:
- a. a blow mold having two mold halves with each having a cavity portion therein;
- b. a bore extending through a portion of said blow mold and opening into said cavity;
- c. a mandrel reciprocably received in said bore and movable between an extended position and a retracted portion, said mandrel has a free end which is in said cavity when said mandrel is in its extended position, said free end has a vacuum surface area portion adapted for selective angagement with a portion of a parison, a second bore extends through a portion of said mandrel and opens on said free end;
- d. a blow needle reciprocably mounted in said second bore and is selectively movable independently of said mandrel between a first position for puncturing the parison and a second retracted position;
- and
- e. means cooperating with said mandrel and said blow needle to effect movement thereof.
Dependencies are inferred from the claim text.