Underwater pelletizer
US8083509B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 18, 2007 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Jul 23, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B9/065
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An underwater pelletizer for cutting extruded plastic into a flow of liquid is disclosed. The pelletizer includes a cutter hub (90) carrying at least one cutter blade (96), a cutter shaft (60) for rotationally driving the cutter hub, and a flexible torque converter (80) for connecting a motor to the cutter hub. In one embodiment, the torque converter has a first set of bushings (82) that is fastened to a face (98) of the cutter hub and a second set of bushings that is fastened to a face (64) of the cutter shaft. The disclosed pelletizer has a shaft extension (20) configured to engage a motor shaft, the shaft extension having an outer diameter having formed thereon a splined portion (38) and first (26) and second (28) sealing surfaces. A disclosed motor adaptor (40) has a seal surface (44). A water chamber plate (50) may also have a seal surface (52). A first mechanical seal (48) is illustratively configured to engage the first seal surface (26) of the shaft extension and the seal surface (44) of the motor adaptor. A second mechanical seal (49) is illustratively configured to engage the second seal surface (28) of the shaft extension and the seal surface (52) of the water chamber pl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.