Centrifugal pelletizing systems and process
US4412964A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1982 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Feb 16, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/05
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Uniform pellets of thermoplastic material are formed by centrifugally expressing strands of heated material from orifices on the rim of a hollow rotor and severing the strands with a linearly moving endless blade at a selected radial distance from the rim. The severed pellets pass in a tangential path through a cooling spray at the entrance to a pellet outlet duct. The severing blade is mounted on a bracket for movement to and from the severing position and for adjustment radially and circumferentially of the rotor axis. Two blade assemblies are employed alternately so that blade replacement may be accomplished without interrupting operation. Downstream from the outlet duct an auxiliary knife-gate is employed adjacent a scrap duct and is movable from a severing position to a scrap duct closing position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.