Multi-shaft extruder kneading discs, kneading disc blocks and extruder
AssigneeKrupp Werner & Pfleiderer GmbH
InventorPaul Andersen
Life of this patent
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Abstract
There is provided a multi-shaft kneading disc, kneading disc block, and a multi-shaft extruder containing the same. The kneading disc and each kneading disc in the kneading disc block having a disc shape with a central section defining an extruder shaft mounting bore and at least one lobe extending radially from said central section and having a crest end. The at least one lobe has a radius X which defines an outer diameter of the kneading disc. The central section has a radius Y which defines an inner diameter of the kneading disc. At least one other lobe extends radially from the central section and has a radius Z. The radius Z defines the outer diameter of at least one other lobe. The radius Z of the other lobe is equal to Y+⅞(X−Y) to Y+¼(X−Y).
Claims26
A multi-shaft extruder kneading disc having a disc shape comprising a central section defining an extruder shaft mounting bore, at least one lobe extending radially from said central section and having a crest end, said at least one lobe having a radius X which defines an outer diameter of the kneading disc, said central section having a radius Y which defines an inner diameter of said kneading disc, at least one other lobe extending radially from said central section and having a radius Z which defines the outer diameter of said at least one other lobe, and the radius Z of said at least one other lobe is equal to Y+⅞(X−Y) to Y+¼(X−Y).
A multi-shaft extruder kneading block having a plurality of kneading discs arranged to provide a kneading block for a multi-shaft extruder comprising:
- each said kneading disc having a disc shape with a central section defining an extruder shaft mounting bore,
- at least one lobe extending radially from said central section and having a crest end,
- said at least one lobe having a radius X which defines an outer diameter of the kneading disc,
- said central section having a radius Y which defines an inner diameter of said kneading disc,
- at least one other lobe extending radially from said central section and having a radius Z which defines the outer diameter of said at least one other lobe, and
- the radius Z is equal to Y+⅞(X−Y) to Y+¼(X−Y).
A multi-shaft extruder comprising:
- a pair of side by side drive shafts,
- a plurality of kneading discs mounted on each drive shaft in side by side kneading relationships,
- each said kneading disc having a central section defining an extruder shaft mounting bore,
- each said kneading disc having at least one lobe extending radially from said central section and having a crest end,
- said at least one lobe having a radius X which defines an outer diameter of the kneading disc,
- said central section having a radius Y which defines an inner diameter of said kneading disc,
- at least one other lobe extending radially from said central section and having a radius Z which defines the outer diameter of said at least one other lobe, and the radius Z is equal to Y+⅞(X−Y) to Y+¼(X−Y).
Dependencies are inferred from the claim text.