Abstract: A rotary sonotrode comprises a rotary body that has a working surface and that is rotatably supported about its longitudinal axis in at least one rotary bearing. A vibration damper is provided between the rotary bearing and the rotary body.

Abstract: In an ultrasonic machining apparatus having leaf springs composed of fiber-reinforced plastic, the leaf springs are provided with a reinforcement in the region of a clamping.

Abstract: The invention relates to an ultrasonic oscillating unit that comprises a cylindrical base body having a center axis and a jacket surface into which a plurality of slits are introduced that extend obliquely to the center axis in a side view of the jacket surface.

Abstract: In an ultrasonic machining apparatus having leaf springs composed of fiber-reinforced plastic, the leaf springs are provided with a reinforcement in the region of a clamping.

Abstract: The invention relates to an ultrasonic oscillating unit that comprises a cylindrical base body having a center axis and a jacket surface into which a plurality of slits are introduced that extend obliquely to the center axis in a side view of the jacket surface.

Abstract: An ultrasonic machine tool comprises a stand that can be attached to a base plate. The machine furthermore has a vibration generator by means of which a working member can be driven, wherein the vibration generator is borne by a slide displaceably guided in the longitudinal direction of the stand. The slide is in turn borne by a linear drive attached to the stand. The vibration generator is located in the alignment of the adjustment path of the linear drive.

Abstract: An ultrasonic machine tool comprises a stand that can be attached to a base plate. The machine furthermore has a vibration generator by means of which a working member can be driven, wherein the vibration generator is borne by a slide displaceably guided in the longitudinal direction of the stand. The slide is in turn borne by a linear drive attached to the stand. The vibration generator is located in the alignment of the adjustment path of the linear drive.

Abstract: A top tool and a bottom tool which can be set relative to one another along an axis perpendicular to a workpiece plane are provided in an apparatus for punching and welding plastic parts. A punch die and a sonotrode are fastened to one of the tools.

Abstract: The present invention relates to a stand for a welding machine having a base plate and a column which is flexurally rigidly connected thereto and which is attached to a guide rail. The rack furthermore has a linear drive for applying a force from a work member to a work piece which can positioned on the base plate, the linear drive being supported by a slide which is displaceably guided along the guide rail. A support is furthermore provided which supports the slide and which counteracts a force-induced displacement of the slide by the linear drive.

Abstract: The present invention relates to a stand for a welding machine having a base plate and a column which is flexurally rigidly connected thereto and which is attached to a guide rail. The rack furthermore has a linear drive for applying a force from a work member to a work piece which can positioned on the base plate, the linear drive being supported by a slide which is displaceably guided along the guide rail. A support is furthermore provided which supports the slide and which counteracts a force-induced displacement of the slide by the linear drive.

Abstract: A top tool and a bottom tool which can be set relative to one another along an axis perpendicular to a workpiece plane are provided in an apparatus for punching and welding plastic parts. A punch die and a sonotrode are fastened to one of the tools.

Abstract: A plastification and injection unit in injection-molding machines for processing of polymer materials, for example rubber, has a plastification screw that is disposed so as to rotate in a screw cylinder, which simultaneously represents the injection piston. The screw cylinder is disposed in an injection cylinder, in an axially displaceable manner. The injection cylinder can be connected with the sprue channel of an injection-molding die by way of a nozzle, and the injection piston has a back-flow barrier. The screw is axially displaceable in the screw cylinder by means of a separate drive. The screw tip projects out of the screw cylinder and has a closure body having a sealing surface for contact with the face surface of the screw cylinder.

Abstract: A plastification and injection unit in injection-molding machines for processing of polymer materials, for example rubber, has a plastification screw that is disposed so as to rotate in a screw cylinder, which simultaneously represents the injection piston. The screw cylinder is disposed in an injection cylinder, in an axially displaceable manner. The injection cylinder can be connected with the sprue channel of an injection-molding die by way of a nozzle, and the injection piston has a back-flow barrier. The screw is axially displaceable in the screw cylinder by means of a separate drive. The screw tip projects out of the screw cylinder and has a closure body having a sealing surface for contact with the face surface of the screw cylinder.

Abstract: A method for injecting plasticized masses such as rubber, silicone, and the like into a mold die of an injection-molding machine, directly or by way of a cold channel, uses a nozzle whose opening width can be changed. The opening width is maximal at the beginning of the injection process, and is changed over the course of the injection process, up to its end, using a predetermined control profile. The temperature of the mass is influenced in a targeted manner in accordance with the opening width, and the friction losses in the mass that change as a result of this.

Abstract: An injection-molding machine has a fixed mold clamping plate and a mold backing plate that can be moved relative to the fixed plate. The movable backing plate can be moved relative to the fixed backing plate, guided along columns or plungers, by means of a process drive. Mold halves held on the backing plates are disposed outside of the space delimited by the columns/plungers. One of the mold backing plates has accommodation spaces for the column ends that are moving in. The spaces are connected with one another and form a system that is closed in itself and filled with a pressure agent, to which pressure can be applied. Each column on the mold side carries a piston-shaped cap on the face of the cap that points into the accommodation space, in each instance, which is larger in diameter, passes completely through the accommodation space, and projects out of it, forming a seal.