US 9,346,190 B2Granted

Device for processing material by mixing and/or plasticating

OwnerHelmuth Schulz, Günther Klammerinventors

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Abstract

The invention relates to a device for processing material by mixing and/or plasticating, comprising at least two conical screws (2, 3) which are arranged next to each other in a common screw casing (1) and the flights of which engage with one another and are driven to rotate in the same direction of rotation about the respective screw axis (4, 5) by at least one motor, with the material that is to be processed being fed to the screws (2, 3) through at least one feed opening (6) in the screw casing (1) which is arranged in the feed zone (E) of one end face of the screws (2, 3), and with the material that has been processed by the screws (2, 3) leaving the screw casing (1) through at least one outlet opening (7) in the screw casing (1) that is arranged in the discharge zone (A) of the other end face of the screws (2, 3). In order to provide advantageous plasticating conditions it is proposed that the ratio of the numerical values of the screw outside diameter (c, d) to the profile overlap, i.e. to the overlapping area of the two screws (2, 3), both in the feed zone (E) and in the discharge zone (A) is in the range of between one to one and one to two.

Claims5

Dependent claims

A device for processing material by mixing and/or plasticating, comprising at least two conical screws which are arranged next to each other in a common screw casing and the flights of which engage with one another and are driven to rotate in the same direction of rotation about the respective screw axis by at least one motor, with the material that is to be processed being fed to the screws through at least one feed opening in the screw casing which is arranged in a feed zone of one end face of the screws, and with the material that has been processed by the screws leaving the screw casing through at least one outlet opening in the screw casing that is arranged in a discharge zone of the other end face of the screws,

wherein a screw outside diameter to profile overlap ratio of the numerical values of the screw outside diameter to the profile overlap, both in the feed zone and in the discharge zone is in the range of between one to one and one to two,
wherein the discharge zone has a maximum profile overlap height and the feed zone has a profile overlap height and a ratio of the maximum profile overlap height in the discharge zone to the profile overlap height in the feed zone is in the range of between one to one and one to four, said maximum profile overlap height corresponding to the flight depth of a screw,
wherein the conical screws comprise at least first, second, and third sections in the longitudinal direction of the screw of which the mutually adjacent sections have different gear toothings, and
wherein the mutually adjacent screw sections have an approximately similar toothing geometry, but have a different number of starts.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/575,130Filed 9 Jun 2010
Published: US 2013/0107659 A12 May 2013
Granted: 24 May 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

B29C 48/525
With an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance: conical screws
B29B 7/48
With more than one shaft: with intermeshing devices, e.g. screws
B29B 7/484
With intermeshing devices, e.g. screws: with two shafts provided with screws, e.g. one screw being shorter than the other
B29B 7/489
Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices: screws