Patent ID: 7311505

Claim:
An apparatus for manufacturing a strip of rubber compounds comprising four extruders of rubber compounds and a single extruder head having an extruding nozzle, the extruder head comprising an extruder die assembly and a main body provided with a recess in which said extruder die assembly is mounted, the main body composed of a pair of laterally-spaced lateral blocks each having an upper inner face and a lower inner face, and a central block disposed between the opposed upper inner faces of the lateral blocks, and a pair of laterally-spaced sub blocks disposed beneath the lateral blocks and having an upper face contacting said lower inner face, said central block having a bottom face and a pair of V-form side faces extending in a V-shaped formation down to lateral ends of the bottom face, said opposed upper inner faces of the lateral blocks extending in the same V-shaped formation as the V-form side faces so as to fit to the V-form side faces of the central block, the lateral blocks each provided with a tip end surface extending between the upper inner face and lower inner face, and the sub blocks each provided with an inner side face extending from the upper face, and said recess formed as an open-bottom recess by the tip end surfaces, the inner side faces and the bottom face, the lateral blocks each provided on the other side of the upper inner face and lower inner face with an upper mount face and a lower mount face on which two of the four extruders are respectively attached, an upper preforming channel extending from each of the upper mount faces to the recess and having a parting plane between the V-form side face and upper inner face, and a lower preforming channel extending from each of the lower mount faces to the recess and having a parting plane between the lower inner face and upper face, wherein said lateral blocks are both immovably fixed to a frame, and on one lateral side of the frame, two of said four extruders are disposed, and the remaining two extruders are disposed on the other lateral side of the frame, each said sub block is supported by a link one end of which is pivoted to one of the lateral blocks at a pivot point and the other end of which is fixed to the sub block, so that the sub block is movable around the pivot point from an upper closed position to a lower oven position, wherein at the upper closed position, the upper face of the sub block contacts with the lower inner face of the lateral block, and at the lower open position, the upper face separates from the lower inner face to open the lower performing channels by the parting plane between the lower inner face and upper face.