Rotary roll-type rubber extruder

Details Rotary roll-type rubber extruder Rotary roll-type rubber extruder

1984-12-14

1986-03-18

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For press shaping surface

425224, 425376B, B21C 2332

Patent

active

045765634

ABSTRACT:
A rotary roll-type rubber extruder including a roll having an outer cylindrical surface rotatively driven by driving means, a housing having a stationary concave surface spaced from and in opposition to the rotating outer cylindrical surface of said roll between a pair of sidewalls close to the outer cylindrical surface of the roll to form a define chamber with the roll, and a mouthpiece detachably secured to the housing to form a defined extruding opening with the roll at an outlet of the defined chamber.
The concave surface of the housing is determined such that pressure gradients at mouthpieces are within a quadrilateral area having four corners corresponding to pressure gradients 65 and 150 kg/cm.sup.3 at a 1 mm opening mouthpiece and pressure gradients 11 and 23 kg/cm.sup.3 at a 5 mm opening mouthpiece in a graph having an ordinate in logarithm showing the pressure gradients ##EQU1## and an abscissa in logarithm showing heights mm of openings of the mouthpieces.

REFERENCES:
patent: 2277313 (1942-03-01), Fowler
patent: 2892212 (1959-06-01), Rhodes
patent: 3270107 (1966-08-01), Bailey et al.
patent: 3765216 (1973-10-01), Green
patent: 3956056 (1976-05-01), Boguslawski et al.
patent: 4156752 (1979-05-01), Riccitiello et al.
patent: 4163377 (1979-08-01), Moreau
patent: 4205951 (1980-06-01), Sollich
patent: 4408974 (1983-10-01), Comerio

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