Method of shaping an extrusion die

Details Method of shaping an extrusion die Method of shaping an extrusion die

1988-03-22

1989-09-26

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...

264 401, 2641771, 264219, 425380, 425465, 425467, 425532, B29F 304

Patent

active

048698628

ABSTRACT:
From the mold cross section and the position of the parison in the mold that parison wall thickness distribution (function of the wall thickness of the parison around the parison) is computed, which would result in the desired wall thickness distribution of the blow molded article; the die gap is then shaped to at least approximate the so computed parison wall thickness distribution.

REFERENCES:
patent: 3114932 (1963-12-01), Donnelly
patent: 3221371 (1965-12-01), Stevens
patent: 3390430 (1968-07-01), Lynch et al.
patent: 4496301 (1985-01-01), Mozer et al.
"Blow Molding Marlex.RTM.", vol. 4, No. 3, The Shaped Extrusion Die, May-Jun., 1963.
"Blow Molding Marlex.RTM.", vol. 7, No. 1., Shaping the Die Bushing, Jan.-Apr., 1966.
"Blow Molding Marlex.RTM." vol. 7, No. 2, Shaping the Die Bushing-Machining Calculations.
Phillips Chemical Company, Plastic Technical Center Report, SSL-178, "Die Shaping Calculation Procedures", May 1969.

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