Arrowhead tip blow needle and method of using the needle to blow

Details Arrowhead tip blow needle and method of using the needle to blow Arrowhead tip blow needle and method of using the needle to blow

1991-04-30

1992-01-07

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264154, 264523, 264540, 425536, B29C 4960

Patent

active

050789481

ABSTRACT:
An apparatus for producing a blow-molded article including a mold having operable die pieces and a passage through at least one of the die pieces for receiving the needle. The needle includes a tubular portion and a cutting tip atop the tubular portion. The cutting tip has three or more blades terminating into a point. The tubular portion has one or more passages communicating with a source of pressurized fluid. The needle is operated to pierce a parison. The arrowhead-tipped needle is used in a method of manufacturing a blow-molded article. A hollow parison is placed within a cavity of a mold. The mold is closed about the parison and a needle is moved to pierce the parison. The needle penetrates the parison and forms flap sections in the parison. The needle tip pushes the flap sections inwardly within the parison.

REFERENCES:
patent: 3167817 (1965-02-01), Zalkind
patent: 3450805 (1969-06-01), Chesser
patent: 3457590 (1969-07-01), Dittman
patent: 3592886 (1971-07-01), Havely
patent: 3821344 (1974-06-01), Peters
patent: 4859397 (1989-08-01), Peters

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