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US 9,868,842 B2Granted
Automatic devulcanizing and plasticizing device and method for using same
OwnerQiang(Charles) Yuaninventor
Life of this patent
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Abstract
Rubber to be recycled is first ground to rubber crumb and then is transferred to a plasticizing unit. The rubber to be recycled is mixed with chemicals including an aromatic, environmental-friendly, low volatility reaction oil, a thickening agent and an activator. This mixture is heated to a desired temperature under anaerobic conditions and then is maintained at that temperature for a suitable time. The processed material is then transferred to a cooling unit in which it is cooled to a temperature below 60° C. prior to being released from the machine.
Claims24
A method of recycling rubber comprising:
- (a) grinding a quantity of rubber to be recycled to a particle size between −10 mesh to −40 mesh, thereby producing rubber crumb;
- (b) providing a rubber plasticizing machine comprising a plasticizing unit comprising a plasticizing conveyor and a cooling unit comprising a cooling conveyor;
- (c) transferring the rubber crumb into the plasticizing unit;
- (d) mixing the rubber crumb with chemicals, thereby producing a mixture, said chemicals comprising a residual aromatic extract oil, a viscosity increaser and an activator;
- (e) heating the mixture in the plasticizing unit to a temperature between 200-250° C. and maintaining the mixture at said temperature for a pre-determined period of time;
- (f) transferring the mixture from the heating unit to the cooling unit;
- (g) cooling the mixture in the cooling unit to a temperature below 60° C.;
- and
- (h) releasing the mixture from the cooling unit.
6 more elements
Dependencies are inferred from the claim text.