Adjustable plug seal mechanism for heat transfer zone separation

Details Adjustable plug seal mechanism for heat transfer zone separation Adjustable plug seal mechanism for heat transfer zone separation

1980-03-24

1982-10-26

Coe, Philip R.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

277 12, 277152, 366147, 366318, 425378R, 425379R, B01F 708, B28C 116, B29B 104

Patent

active

043559050

ABSTRACT:
An easily-movable plug seal that is susceptible to quick and ready longitudinal adjustment in the central, lengthwise bore of an internally differentially heated (or cooled) extruder screw for sequentially diverse and distinct heat controlled zones within the extruder barrel is comprised of at least a single, cup-like member that is adequately flexible and supple to be flared laterally outwardly and urged into tight wall contact to make a sealing engagement against the internal screw bore wall upon pressurization of the interior of the plug seal member by the heat transfer fluid being passed into and applied within the screw.

REFERENCES:
patent: 3331100 (1967-07-01), Gould
patent: 3588956 (1971-06-01), Poux et al.

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