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US 12,076,903 B2Granted
Screw elements for extrusion apparatus and methods of manufacturing a honeycomb body
AssigneeCorning Incorporated
InventorsDavid Robertson Treacy, Jr., Conor James Walsh, Stephanie Stoughton Wu
Life of this patent
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Abstract
Screw elements, extrusion apparatus, and methods of manufacturing honeycomb bodies are described herein. A segment for a ceramic batch screw extruder machine has at least one pump and mix screw element. The pump and mix screw element has a pitch, a diameter, and a pitch to diameter ratio of 0.8 to 2.6.
Claims17
A segment for a ceramic batch screw extruder machine, the segment comprising:
- a first pump and mix screw element and a second pump and mix screw element, wherein each of the first and the second pump and mix screw elements comprises a pitch, a diameter, and a pitch to diameter ratio of 0.91 to 2.6;
- a kneading element disposed between the first pump and mix screw element and the second pump and mix screw element;
- wherein the pitch to diameter ratio of either or both of the first pump and mix screw element and the second pump and mix screw element changes along a length of the segment while remaining within a range of 0.91 to 2.6;
- and
- wherein a first transition element transitions the first pump and mix screw element to the kneading element and a second transition element transitions the kneading element to the second pump and mix screw element.
2 more elements
A ceramic batch screw extruder machine, the machine comprising:
- at least one barrel defining an extruder length;
- a shaft disposed at least partially within the at least one barrel;
- a segment disposed along the shaft and the segment comprising at least one pump and mix screw element, wherein the pump and mix screw element comprises a pitch, a diameter, and a pitch to diameter ratio of 0.91 to 2.6;
- wherein the pitch to diameter ratio of the pump and mix screw element changes along a length of the segment while remaining within a range of 0.91 to 2.6;
- and
- wherein the length of the segment along which the pitch to diameter ratio changes extends through a backup length region of the extruder, the backup length region of the extruder comprising from about 10% to about 45% of the extruder length.
3 more elements
Dependencies are inferred from the claim text.