Screw shaft structure for double-shaft extruder
US9057264B2 · kind B2 · utility
0Cited by
10References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2012 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Jun 18, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/36
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A screw shaft structure for a twin screw extruder includes a tapered section (20) provided between a ground section (6) and a screw piece inserting section (8), and a tapered ring (21) fitted onto the tapered section (20). The tapered ring (21) serves as a flange section. An object is to reduce the weight of raw material to be used for manufacturing a screw shaft by combining a tapered section and a tapered ring as a structure of a flange section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.