Device for adjusting the pressure of the plastic material in a s

Details Device for adjusting the pressure of the plastic material in a s Device for adjusting the pressure of the plastic material in a s

1994-10-11

1996-03-19

Scherbel, David

Agitating

Rubber or heavy plastic working

With specified discharge means

366 87, 425381, 425446, 425447, B28C 716, B29C 3700

Patent

active

054998697

ABSTRACT:
A throttle for the adjustment of the pressure of plastic material in screw extruders in which the throttle is a cylindrical plunger submerged in the melt flow in a melt channel. In order to eliminate dead spaces downstream of the throttle, the plunger is arranged in a symmetrical and displaceable manner in a rectangular melt channel and one or more through holes are provided in the plunger in the flow direction in the submerged region of the plunger.

REFERENCES:
patent: 1540209 (1925-06-01), Frazier
patent: 1585149 (1926-05-01), Humphrey
patent: 1802897 (1931-04-01), Holden et al.
patent: 2339527 (1944-01-01), Thompson
patent: 3054143 (1962-09-01), Stenger
patent: 3081804 (1963-03-01), Koch
patent: 3346918 (1967-10-01), Deluze et al.
patent: 3924997 (1975-12-01), Kosinsky
patent: 4184772 (1980-01-01), Meyer
patent: 4652225 (1987-03-01), Dehennau et al.
G. Schenkel, Kunststoff-Extrudertechnik, pp. 260-261, 1963.

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