Apparatus for forming a thick-walled tubular product

Details Apparatus for forming a thick-walled tubular product Apparatus for forming a thick-walled tubular product

1976-07-22

1978-01-17

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Core, pin or insert member

425378R, 425380, B29F 308

Patent

active

040690016

ABSTRACT:
A mandrel and bushing sizing die assembly has an annulus formed between the mandrel and the bushing of the assembly for passing plastic material therethrough and forming a thick-walled tubular product. A middle portion of the annulus has a thickness in the range of about 25-50 percent of the greatest thickness of a first end portion of the annulus and the second, discharge end of the annulus has a thickness greater than about 1/4-inch and greater than the thickness of the middle portion of the annulus.

REFERENCES:
patent: 2400055 (1946-05-01), Wallace
patent: 2975475 (1961-03-01), Heston
patent: 3309443 (1967-03-01), Scott, Jr. et al.
patent: 3393427 (1968-07-01), Larsen

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