FIELD: technological processes.
SUBSTANCE: disclosed is dust-retaining device (14) for sealed plasticizer mixer (1), wherein device is configured for very good supply of lubricating oil. Sealed plasticizer mixer (1) includes two rotors (4) and support element (3, 9A, 9B). Dust- retaining device (14) includes rotating ring (15) attached to each rotor (4), and fixed ring (16) attached to support element (3, 9A, 9B). Both rings (15, 16) have corresponding contact surfaces that enter surface contact with each other. Stationary ring (16) has part (20) for supply of lubricating oil, made with through hole. Part of the through hole, including the section opening on the contact surface, is a long hole passing along the circumferential direction of rotation of rotating ring (15).
EFFECT: invention makes it possible to reduce abrasive wear of fixed ring attached to rotor support element and to increase supply of lubricating oil to contact surfaces (19) and (17) of fixed ring (16) and rotating ring (15).
6 cl, 6 dwg
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