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US 5,516,205 AGranted
Twin extruder
AssigneeThe Japan Steel Works, Ltd.
InventorsNorimasa Oda, Minoru Yoshida, Hideki Mizuguchi, Katsumi Sumioda
Life of this patent
Estimating the term…
Abstract
A twin extruder has a material supplying section, a conveying section, a kneading section, a degassing section, and a discharging section. In the conveying section and the neading section, a plurality of grooves are formed in each of two walls arcuate in cross section of a cylinder which define an internal hole in the cylinder, and/or a cut is formed at each of the junctions of the walls of the cylinder.
Claims15
A twin extruder comprising:
- a cylinder provided with a material supplying section, a conveying section, a kneading section, a degassing section, and a discharging section, said cylinder having an internal hole therein;
- a pair of screws rotatably engaged with each other in the internal hole of the cylinder;
- and
- a plurality of grooves formed in two walls arcuate in cross section of said cylinder which defines said internal hole in said conveying section and said kneading section in such a manner that said grooves are continuously extended axially, wherein a distance between each of said grooves and an outer rotational periphery of the respective one of said screws is gradually decreased in the direction of rotation thereof.
1 more element
A twin extruder comprising:
- a cylinder provided with a material supplying section, a conveying section, a kneading section, a degassing section, and a discharging section, said cylinder having a pair of holes therein extending in an axial direction in a side-by-side relationship which communicate with one another, said holes being defined by respective internal surfaces which intersect one another along a pair of axially extending ridges;
- a pair of screws rotatably disposed in said pair of holes, respectively, wherein at least one groove is provided in each of said respective internal surfaces, each said at least one groove extending substantially in said axial direction and defining a gas relief space through which gas released from the kneaded material flows to said degassing section.
Dependencies are inferred from the claim text.