초록 ▼

Old rubber tires from cars and trucks are first cut up by a coarse pregrinder into pieces of about 100 to 200 millimeter size. These cuttings are then comminuted in successive stages down to particle sizes of about 5 millimeters. For that purpose they are passed through grinding mills with fluted ro

Old rubber tires from cars and trucks are first cut up by a coarse pregrinder into pieces of about 100 to 200 millimeter size. These cuttings are then comminuted in successive stages down to particle sizes of about 5 millimeters. For that purpose they are passed through grinding mills with fluted rollers which deform the particles so as to rupture and expose their textile components. The comminuted particles produced in the various stages are screened to separate metal containing from metal free particles. In subsequent screening and comminuting stages the metal free particles are further reduced to separate masses of graded rubber flour substantially free of metallic and fibrous tire components.

대표청구항 ▼

The method of recovering rubber from worn automobile tires which comprises the steps of: initially cutting the tires to pieces by first pregrinding means; subsequently recutting said pieces by second pregrinding means independent of said first pregrinding means; segregating said recut pieces into me

The method of recovering rubber from worn automobile tires which comprises the steps of: initially cutting the tires to pieces by first pregrinding means; subsequently recutting said pieces by second pregrinding means independent of said first pregrinding means; segregating said recut pieces into metal containing and substantially metal free pieces; comminuting said metal containing and said metal free pieces independently of each other into reduced size metal containing and into reduced size metal free pieces; segregating said reduced size metal free pieces into a mass of relatively large size particles and into a first mass of relatively small size particles; comminuting said relatively large size particles into a second mass of relatively small size particles; and comminuting said first and second masses of relatively small size particles into graded masses of rubber flour.