Processing shaft for machines for extruding, kneading, dispersing, mixing or homogenizing, in particular, plastics materials

Claim 1

Processing shaft for machines for extruding, kneading, dispersing, mixing or homogenizing viscous, plastic, granular or pulverized materials, comprising a core shaft having at least one longitudinal groove and annular disc-shaped or bushing-type slip-on processing members which are provided with a projection for engagement with the core shaft longitudinal groove to prevent rotation on the core shaft, also comprising an axial securing member for the processing members which is attached to the front end of the core shaft, at least one slip-on spacer sleeve on the core shaft to support the processing members axially rearwardly, with a sealing surface on its external circumference, a slip-on coupling sleeve at the rear end area of the core shaft with a projection for engagement with the core shaft longitudinal groove for torque transmission and with an external thread onto which a clamp nut with an internal thread is screwed so as to overlap the coupling sleeve, and a clamping force transmitting member tightenable rearwardly against a stop member of the core shaft by the clamp nut, characterized in that the transmitting member is in the form of a bolt (48) which extends transversely to the core shaft axis and is inserted into a channel (28) of the core shaft (20) forming the stop member and likewise extending transversely to the core shaft axis, and in that the coupling sleeve (36) is supported in a forward direction via the spacer sleeve (72) and the processing members (78) on the securing member (84).