Closed mixer working process with stroke-control ram
OwnerAntonio Proni, Danile Balasso +1inventors
InventorsAntonio Proni, Danile Balasso, Alan Bottomley
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Abstract
The invention relates to the processing, in a closed mixer (1), of polymer-based mixtures and compounds for the manufacture of tyres or components thereof. To improve the dispersion of the ingredients in the polymer base, the pressing ram (8) is lowered to the working condition controlling the position thereof over time, in order to compress the ingredients within the mixing chamber (4). The invention is particularly suitable for the dispersion of reinforcing fillers such as silica or carbon black in the polymer base and the incorporation of said fillers in the latter.
Claims10
Method of processing polymer-based mixtures and compounds in a closed mixer (1) comprising a mixing chamber (4), a pair of rotors (2, 3), a pressing ram (8) arranged above the rotors, movable between a raised resting condition which allows the introduction of material into the mixing chamber and a lowered working condition during mixing, characterized in that lowering of the ram to compress said material in the mixing chamber occurs by controlling the position-time profile of the descent of the ram, until the lower end-of-stroke position is reached.
Dependencies are inferred from the claim text.