Abstract: A continuous process and apparatus for remelting fluffy, high bulk tangled polymer waste, such as nylon or polyethylene terephthalate fibers, which comprises chopping the waste into pieces 15 to 40 mm. mesh size, passing the chopped waste through a charging zone, a compressing screw, and finally an extruder. The charging zone is formed by a vertically-disposed hopper, having two opposed parallel walls and two opposed converging walls. Inside the hopper is a plurality of agitating shafts having tapered fingers that loosen and disentangle the chopped waste. The waste then is compressed to one-fourth to one-fifth its volume and transferred to an extruder where it is melted, degassed and extruded to a predetermined shape.

Abstract: Compacting of a rubber mixture by forcing a vulcanisable mixture of rubber and additives required for its manufacture through a diminishing cross-section. The mixture includes a vulcanising medium and is in the form of a pourable powder having a particle size of 0.1 to 6 mm with a powder density of 0.4 to 0.8 g/cm.sup.3. Compacting is at a temperature of 0.degree. to 60.degree. C, so that a granular, compact, yet not completely homogeneous, mixture of a density of 1.1 to 1.4 g/cm.sup.3 is produced. A device for compacting is also shown.

Abstract: A process and apparatus for the production of materials preplasticized to their final density from high molecular weight powder-form completed mixtures, which are directly used as starting product for subsequent final processing, wherein the powder mixture is conveyed along a helical compression screw and subjected to accelerated compression and, at the same time, preplasticized at a temperature which corresponds to the material temperature required for final processing.