Patent ID: 7819649

Claim:
An apparatus for blow molding wherein a tubular parison extruded from material passing through an annular opening of a forming die is captured in a mold assembly comprising a mold cavity so as to close one end of the parison to permit expansion thereof by pressurizing the parison within the mold cavity, the apparatus comprising a blow pin for conducting the pressurized fluid from a source thereof into the parison, an actuator comprising an actuator rod for advancing the blow pin to an advanced position achieving sealing engagement of the blow pin and an opening in the parison and for retracting the blow pin to a retracted position removed from the opening in the parison, a blow pin shaft supporting the blow pin and connected to the actuator rod and passing through the forming die internally of the annular opening thereof and adjusting means for determining the orientation of the actuator to achieve substantial parallelism of the blow pin shaft and the centerline of the opening through the forming die through which the blow pin shaft passes and to achieve substantial parallelism of a sealing element of the blow pin with a plane transverse to the opening of the parison.