Shaping of dies

Details Shaping of dies Shaping of dies

1983-08-16

1988-06-14

Smith, Jerry

Boots, shoes, and leggings

76 4, 76107A, 364476, B29F 300

Patent

active

047516518

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: 3309443 (1967-03-01), Scott, Jr. et al.
patent: 3981672 (1976-09-01), Wilson
patent: 4063865 (1977-12-01), Becker
patent: 4279857 (1981-07-01), Feuerherm
patent: 4382766 (1983-05-01), Feuerherm
patent: 4472129 (1984-09-01), Siard
patent: 4496301 (1985-01-01), Mozer et al.
Antec Journal of Society of Plastic Engineers, 36th Annual Technical Conference, "A Method of Calculating the Wall Thickness Distribution in Blow Molded Articles", H. Fukase et al, Apr. 24-27, 1978.
Phillips Chemical Company Sales Service Laboratory Technical Bulletin, "The Shaped Extrusion Die", vol. 4, No. 3, Jun. 1963.

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