초록 ▼

A duplex extruder head for receiving extrudate from each of two extruders to deliver a composite unitary extrudate such as tire tread stock has a cavity plug or vee-block insert secured in an open top channel-shaped receiver without bolts or hinges by a pair of slidable clamps. The head also has a t

A duplex extruder head for receiving extrudate from each of two extruders to deliver a composite unitary extrudate such as tire tread stock has a cavity plug or vee-block insert secured in an open top channel-shaped receiver without bolts or hinges by a pair of slidable clamps. The head also has a transverse slot for slidably receiving a die assembly endwise into the slot. The die assembly is then elevated to operating position and securely clamped by a pair of wedge-like gibs. Clamping of either the insert or the die assembly is effected by hydraulic cylinder or equivalent means. The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be made to the accompanying drawing and the following detailed description.

대표청구항 ▼

A duplex extruder head comprising: passage means defining flow passages from each of two extruders to an outlet face; die means including a die assembly having an upper surface for sealably engaging the outlet face; slide means for clamping said die means to said outlet face including a pair of gibs

A duplex extruder head comprising: passage means defining flow passages from each of two extruders to an outlet face; die means including a die assembly having an upper surface for sealably engaging the outlet face; slide means for clamping said die means to said outlet face including a pair of gibs having longitudinally extending splines arranged at a small angle relative to said outlet face, a pair of ribs extending transversely of and fixed relative to said passage means each rib having a longitudinal groove extending at said small angle and slidably accommodating the respectively associated gib; and drive means connected to the slide means and operable to move said gibs to elevate the die means to engage the outlet face and to lower the die means from said face. A duplex extruder head comprising: receiver means defining a cavity; flow passage insert means removably disposed in said cavity and having an outlet face; die means removably engageable with the outlet face; and clamp means for securing the insert means in the cavity and comprising a plurality of lugs spaced longitudinally of the insert means and overlying the receiver means, each lug having an upper surface inclined at a small angle relative to the outlet face, a pair of ledges extending longitudinally of the receiver means and underlying said lugs, and an opposed pair of clamp yokes each having a flange slidably engageable with the respectively associated ledge and a plurality of lugs each having an inclined lower surface inclined at said small angle and parallel to the respective upper surfaces of the first said lugs, the second said lugs being spaced apart sufficiently to allow the first said lugs to pass upwardly therebetween; and forcing means mounted on the receiver means and operable to move the clamp yokes to engage the associated pairs of first and second lugs to secure the insert means in the cavity and oppositely to align the respective second lugs with the spaces defined by the first lugs to allow removal of the insert means.