Abstract: The invention relates to a device for the plastic sheathing of connections, which are produced by circular weld seams, of a pipeline comprising steel pipes which are provided with a factory-fitted plastic insulation and are reinsulated in the region of the circular weld seam by injection molding, having a split injection mold, which can be connected to an injection-molding fixture and, in the region of the weld seam, can be laid and secured, in the manner of a sleeve, around the steel pipes in such a manner that the injection mold in each case covers the end of the factory-fitted plastic insulation of the two steel pipes which have been welded together, the injection mold having an internal diameter, at least in the axial region between the factory-fitted plastic insulations, which corresponds to the external diameter of the plastic sheathing which is to be produced in the region of the weld seam and having an internal diameter, at its ends, which corresponds to the external diameter of the factory-fitted pla

Abstract: A method of manufacturing a hollow spindle, especially for the pivotal mounting of valve-actuating levers to control exhaust-and-intake valves of an internal combustion engine. The spindle has an outer tube, in the interior of which a shaped tubular body is fixed in order to form at least two liquid-carrying chambers. To form a chamber, the tubular body is provided with a cutout extending in the longitudinal direction. The tubular body is a shaped inner tube that, seen in cross-section, has an inwardly-curved region that makes a rounded and stepless transition to the circular region, and of the tubular body. At least the circular region is joined by virtue of its material to the outer tube.