Apparatus for feeding elastomeric materials, use of such apparatus and two methods of operation

摘要

A gear pump (1) is preceded by a screw extruder (10). The screw barrel (12) has a conical section (15) and the screw (11) is tapered in the area corresponding to the cone. Control of energy input to the conveyed material is achieved by axial adjustment of the screw inside the barrel. Independent claims are made for: (a) a use of the pumping equipment for conveying elastomers and in particular rubbers; (b) a first method for operating the equipment in which when metal is detected operation of the screw (11) and gear pump (1) are halted and a second method in which an indication is given to an operator who can remove the metal without halting the process.