Kneading element and related articles
First Claim
1. A kneading element for a screw extruder for plastics, rubber, and coating applications, the kneading element comprising:
- a central portion having a substantially circular outer limit and having a shaft receiving bore defined therein; and
at least one lobe extending radially from said central portion, said at least one lobe having an outer periphery ridge and first and second lateral sidewalls, wherein one of said lateral sidewalls of said at least one lobe is concave between said outer periphery ridge and said central portion;
wherein the outer periphery ridge defines a surface that is disposed generally equidistant from the outer limit of the central portion and the ridge is shorter in a circumferential direction than the circumferential length of the lobe where the lobe is attached to the central portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A modified kneading element for a screw extruder, peripherally congruent, aligned, and contiguous with a cross-sectional profile of a modified conveying element, includes a central portion defining a root diameter having a shaft receiving bore defined therein; and at least one lobe extending radially from the central portion, each lobe having an outer periphery ridge and first and second lateral sidewalls, wherein one of the lateral sidewalls of each lobe is concave between the outer periphery ridge and the central portion. Kneading blocks including such kneading elements and screw extruders including such kneading blocks are also provided.
61 Citations
22 Claims
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1. A kneading element for a screw extruder for plastics, rubber, and coating applications, the kneading element comprising:
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a central portion having a substantially circular outer limit and having a shaft receiving bore defined therein; and at least one lobe extending radially from said central portion, said at least one lobe having an outer periphery ridge and first and second lateral sidewalls, wherein one of said lateral sidewalls of said at least one lobe is concave between said outer periphery ridge and said central portion; wherein the outer periphery ridge defines a surface that is disposed generally equidistant from the outer limit of the central portion and the ridge is shorter in a circumferential direction than the circumferential length of the lobe where the lobe is attached to the central portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A kneading block comprising a plurality of kneading elements for a screw extruder for plastics, rubber, and coating applications, each kneading element contacting at least a portion of at least one adjacent kneading element, and wherein at least one kneading element of said kneading block includes a central portion having a substantially circular outer limit and having a shaft receiving bore defined therein, and at least one lobe extending radially from said central portion, said at least one lobe having an outer periphery ridge and first and second lateral sidewalls, wherein one of said lateral sidewalls of said at least one lobe is concave between said outer periphery ridge and said central portion;
wherein the outer periphery ridge defines a surface that is disposed generally equidistant from the outer limit of the central portion and the ridge is shorter in a circumferential direction than the circumferential length of the lobe where the lobe is attached to the central portion. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A kneading block comprising a plurality of kneading elements, wherein at least one kneading element of said kneading block includes a central portion defining a shaft receiving bore and at least one lobe extending radially from said central portion, said at least one lobe having an outer periphery ridge and first and second lateral side walls, wherein one of said lateral side walls of said at least one lobe is concave between said outer periphery ridge and said central portion, wherein the block comprises N number of kneading elements adjacent to each other, wherein all the elements have at least one lobe having first and second lateral side walls and wherein one of the lateral sidewalls on said at least one lobe is concave between said outer periphery ridge and said central portion wherein there are at least three kneading elements, and wherein the first and last kneading elements are twisted in a first direction and wherein the other elements are twisted in an opposite direction.
Specification