Head tooling parison adapter plates

Claim 1

Plastic blow molding equipment consisting of: a die housing having a tubular chamber disposed therein, said tubular chamber having an outlet in said die housing, said die housing including an inner portion on the inside of said tubular chamber and an outer portion on the outside of said tubular chamber; head tooling attached to said die housing, said head tooling having a tubular passageway therethrough of an unequal diameter throughout the length thereof, said tubular passageway in said head tooling being in communication with the outlet in the die housing; adjusting means associated with said head tooling for forming a parison outlet of an adjustable size, said adjusting means including an inner section defining the lower portion of the inside of said tubular passageway and an outer section defining the lower portion of the outside of said tubular passageway, said inner section including a plurality of inner plates each having a progressively larger outer diameter from one end of head tooling to the other end thereof and said outer section including a plurality of outer plates each having an inner surface with progressively larger diameter from the said other end of the head tooling to the said one end thereof; means for delivering a deformable material in a plastic condition to said tubular chamber and forcing such deformable material through said tubular chamber in the die housing and through the tubular passageway in the head tooling to form a parison attached to the outlet of said head tooling; and means for removing or adding one or more of said inner and outer plates for adjusting the size of the parison outlet in the head tooling.