Internal mixer
US5782560A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 24, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Jun 24, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S366/601
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An internal mixer and controller enables the phase difference and the speed ratio between two rotors to be changed without stopping the operation of the mixer. The internal mixer comprises: nonintermeshed first and second rotors disposed in a mixing chamber; first and second drive units; first and second phase measuring devices; first and second speed measuring devices; and a control unit for controlling the first and second drive units on the basis of signals from the first and second speed measuring devices and signals from the first and second phase measuring devices. The control unit controls the two rotors so as to synchronously rotate at the same speed on the basis of the signals from the speed measuring devices when the two rotors fixedly rotate at the same speed. When the phase difference between the two rotors is changed, the control unit calculates the phase difference from the signals from the phase measuring devices, compares the calculated phase difference with a set phase difference, and controls the second drive unit to change the speed of the second rotor, thereby changing the phase. When the phase difference is equal to the set phase difference, the control unit ag…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.