Extruder temperature controller
US4262737A · kind A · utility
17Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Jun 15, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92704
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic extruder system having a barrel and a shell with heat exchange elements surrounding the barrel is disclosed. Two thermocouples are provided, one for sensing the temperature of the inner surface of the barrel and the other for sensing the temperature of the shell. A system controller, into which a desired barrel setpoint temperature can be set and stored, receives and stores the independent temperature signals from the thermocouples and controls the heat exchange elements to automatically maintain the temperature of the extruder barrel close to the desired barrel setpoint temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.