Agitating – Rubber or heavy plastic working – With specified feed means
Patent
1987-04-24
1989-04-04
Hornsby, Harvey C.
Agitating
Rubber or heavy plastic working
With specified feed means
366 77, 366 79, 366142, B28C 704, B01F 1500
Patent
active
048181137
ABSTRACT:
The invention relates to a process for mixing a polymer composition using an internal mixer having rotors 18, 20 rotatably mounted in a chamber 12, a ram 28 by which pressure can be applied to material in the chamber 12, and temperature control for the mixer. Materials are introduced into the chamber 12 and, after introduction of all the materials, at least three mixing variables e.g. temperature, time and energy, indicating mixing quality are monitored and control variables e.g. rotor speed and/or ram pressure adjusted dependent on the monitored mixing variables to achieve previously defined targets or if all are not simultaneously achievable, the most significant target. Control is initiated when the ram has reached a predetermined position and when at least one preselected condition e.g. time, temperature or energy, has been achieved. The mixer comprises a computer 44 effecting the control and arranged to heuristically derive relationships between control and mixing variables by which the process is controlled.
REFERENCES:
patent: 3447201 (1969-06-01), Seanor
patent: 3921963 (1975-11-01), Neff et al.
patent: 3999046 (1976-12-01), Porter
patent: 4057228 (1977-11-01), Volker et al.
patent: 4455091 (1984-06-01), Bamberger et al.
Farrel Bridge Limited
Gerrity Stephen F.
Hornsby Harvey C.
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