Abstract: The invention relates to a hydraulic unit for a mobile hydraulic tool with a hydraulic piston hydraulically adjustable between a starting position and an end position and a piston rod that is connected to the hydraulic piston and has a tool holder for a tool insert. In order to provide a hydraulic unit for a mobile hydraulic tool that enables the use of tool inserts with different load bearing capacity, it is provided that a pressure control valve connecting the pressure chamber to a cylinder chamber and limiting the pressure acting on a hydraulic piston on the pressure chamber side is arranged on the hydraulic piston and is connected to the piston rod such that a response pressure of the pressure control valve can be adjusted by the piston rod.

Abstract: The invention relates to a punch carrier for a punch machine comprising a piston unit exchangeably arranged on the punch machine, and a punch holder arranged on the piston unit for exchangeably arranging a punch. Furthermore, the invention relates to a hydraulic punch machine comprising: a hydraulically driven punch carrier and a die adapted to a punch. In order to provide a punch machine as well as a punch carrier for a punch machine that reliably allows an easy exchange of the punch to adapt to changing processing requirements, the punch holder has a punch seat transversal to the direction of the longitudinal axis of the piston unit, and a stripper that can be attached to the punch machine and has a passage for the punch, wherein the stripper is designed such that it fixes the punch in an operating position in the punch seat. Furthermore, it is provided that the punch carrier is designed according to one or more of claims 1 to 5.

Abstract: The invention relates to a riveting tool for setting blind rivet nuts and/or blind rivet screws, comprising a drive piston which is able to be hydraulically adjusted from an initial position toward an end position, a pull rod which is releasably and operatively connected to the drive piston and which is able to be adjusted by the drive piston from a rivet receiving position into a setting position and a coupling element fixing the pull rod and a drawing mandrel to one another in the longitudinal axial direction.

Abstract: The invention relates to a riveting tool for setting blind rivet nuts and/or blind rivet screws, comprising a drive piston which is able to be hydraulically adjusted from an initial position toward an end position, a pull rod which is releasably and operatively connected to the drive piston and which is able to be adjusted by the drive piston from a rivet receiving position into a setting position and a coupling element fixing the pull rod and a drawing mandrel to one another in the longitudinal axial direction.

Abstract: The invention relates to a hydraulic unit for a mobile hydraulic tool with a hydraulic piston hydraulically adjustable between a starting position and an end position and a piston rod that is connected to the hydraulic piston and has a tool holder for a tool insert. In order to provide a hydraulic unit for a mobile hydraulic tool that enables the use of tool inserts with different load bearing capacity, it is provided that a pressure control valve connecting the pressure chamber to a cylinder chamber and limiting the pressure acting on a hydraulic piston on the pressure chamber side is arranged on the hydraulic piston and is connected to the piston rod such that a response pressure of the pressure control valve can be adjusted by the piston rod.

Abstract: The invention relates to a punch carrier for a punch machine comprising a piston unit exchangeably arranged on the punch machine, and a punch holder arranged on the piston unit for exchangeably arranging a punch. Furthermore, the invention relates to a hydraulic punch machine comprising: a hydraulically driven punch carrier and a die adapted to a punch. In order to provide a punch machine as well as a punch carrier for a punch machine that reliably allows an easy exchange of the punch to adapt to changing processing requirements, the punch holder has a punch seat transversal to the direction of the longitudinal axis of the piston unit, and a stripper that can be attached to the punch machine and has a passage for the punch, wherein the stripper is designed such that it fixes the punch in an operating position in the punch seat. Furthermore, it is provided that the punch carrier is designed according to one or more of claims 1 to 5.

Abstract: Particulate expandable styrene polymers requiring short residence times in the mold are obtained by polymerizing styrene and, optionally, other copolymerizable monomers in the presence of expanding agents and from 0.001 to 0.1% by weight of a brominated oligomer or polymer of a 1,3-diene for at least part of the time at temperatures of from 110.degree. to 140.degree.C.