Preparation of a plastic for its extrusion particularly in the f

Details Preparation of a plastic for its extrusion particularly in the f Preparation of a plastic for its extrusion particularly in the f

1987-11-03

1989-04-25

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

Including heating or cooling means

2221465, 425381, 425DIG13, B29C 4786

Patent

active

048243558

ABSTRACT:
The invention relates to the distribution of a plastic of the butyl rubber type, and more particularly to its preparation and its routing from a tank where it is hard, viscous and at a relatively low temperature, to an extrusion nozzle where it must have a viscosity and a hardness much lower than those that it had initially. The invention proposes a preparation in several stages combining heating and pressurizing so as to feed, at the desired delivery and with the desired quality of plastic, an optionally mobile nozzle. The invention applies to the production of a bead that is used as a seal and as an interlayer in multiple glazings.

REFERENCES:
patent: 3031106 (1962-04-01), Hooker
patent: 3412903 (1968-11-01), Van Riper, Jr. et al.
patent: 3456849 (1969-07-01), Sjostrand
patent: 3637111 (1972-01-01), McCreary
patent: 3982669 (1976-09-01), Moore
patent: 4024854 (1977-05-01), Park et al.
patent: 4073409 (1978-02-01), Gardner et al.
patent: 4168942 (1979-09-01), Firth
patent: 4205104 (1980-05-01), Chenel
patent: 4227069 (1980-10-01), Gardner et al.
patent: 4632281 (1986-12-01), Wold

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