Apparatus for the continuous, dry, non-pressurized regeneration

Details Apparatus for the continuous, dry, non-pressurized regeneration Apparatus for the continuous, dry, non-pressurized regeneration

1987-01-16

1988-08-09

Hoag, Willard

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Electro-static or inductive field

219 1055A, 219 1055R, 219 1057, B29C 3512, H05B 664

Patent

active

047624841

ABSTRACT:
Comminuted salvaged rubber is heated to the reclaiming temperature in a two-stage process such that part of the overall heat required is introduced by microwave heating and the remainder by convectional heating. Material preheated during the first stage is transferred to the second stage in such a way that the relative position of all the particles is maintained with as little change as possible. Since the temperature profile of microwave heating shows a maximum in the interior and a minimum at the periphery, whereas that of convectional heating is just the reverse, the temperature distribution within the material can be evened out to a great extent by combining these two different methods of heating. Since it is no longer necessary in this case to heat the material to such an extent convectionally, it is possible to avoid caking and the formation of deposits, and thus to considerably improve the quality of the reclaimed rubber.

REFERENCES:
patent: 2353362 (1944-07-01), Rudd
patent: 3626838 (1971-12-01), Gorakhpurwalla
patent: 4275283 (1981-06-01), Focht

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