Abstract: An extrusion line for the production of peroxide cross-linked polyethylene pipes includes a cross-linking oven (5, 13) having an actuated deflection roller (7). The cross-linking oven has a first heating section (A) that extends from an inlet to said deflection roller (7) and a second heating section (B) that extends from said deflection roller to an outlet. An element is provided for adjusting a height of the deflection roller (7) and an angle of the first and second heating sections (A, B) relative to a horizontal plane.

Abstract: A method and extrusion line for producing peroxide-cross-linked polyethylene pipes in an extrusion line having an extruder, a cross-linking furnace and a flue. The extruded tube is subjected to a stretching process, and the cross-linking furnace has a first heating section that extends from its inlet to an actuated deflection roller and a second heating section from the deflection roller to its outlet. The stretching process in the first heating section and the stretching process in the second heating section are monitored and regulated in such a manner that the necessary stretching of the pipe takes place primarily in the first heating section, and the stretching of the pipe in the second heating section is subjected to zero adjustment. In this case, the height of the deflection roller(s) of the cross-linking furnace and the angle of the heating sections to the horizontal plane can be height-adjustable.

Abstract: A method and extrusion line for producing peroxide-cross-linked polyethylene pipes in an extrusion line having an extruder, a cross-linking furnace and a flue. The extruded tube is subjected to a stretching process, and the cross-linking furnace has a first heating section that extends from its inlet to an actuated deflection roller and a second heating section from the deflection roller to its outlet. The stretching process in the first heating section and the stretching process in the second heating section are monitored and regulated in such a manner that the necessary stretching of the pipe takes place primarily in the first heating section, and the stretching of the pipe in the second heating section is subjected to zero adjustment. In this case, the height of the deflection roller(s) of the cross-linking furnace and the angle of the heating sections to the horizontal plane can be height-adjustable.

Abstract: An apparatus for producing a mixture of various bulk materials, comprising a weighing device that is carried by the framework of the apparatus. A weighing container is suspended or supported by the weighing device, and is adapted to receive a desired mixture of bulk material components from supply containers via an upper inlet. A mixing device extends from above into the weighing container and is driven by motor-transmission means that is mounted on the framework and is gravimetrically separate from the weighing container. The mixing device is permanently suspended on the motor-transmission means free of the weighing container.

Abstract: A method and extrusion line for producing peroxide-cross-linked polyethylene pipes in an extrusion line having an extruder, a cross-linking furnace and a flue. The extruded tube is subjected to a stretching process, and the cross-linking furnace has a first heating section that extends from its inlet to an actuated deflection roller and a second heating section from the deflection roller to its outlet. The stretching process in the first heating section and the stretching process in the second heating section are monitored and regulated in such a manner that the necessary stretching of the pipe takes place primarily in the first heating section, and the stretching of the pipe in the second heating section is subjected to zero adjustment. In this case, the height of the deflection roller(s) of the cross-linking furnace and the angle of the heating sections to the horizontal plane can be height-adjustable.

Abstract: The present invention relates to an apparatus for producing a mixture of various bulk material components, with supply containers for the individual bulk material components and with a weighing container with an integrated mixing device which is suspended or supported on a weighing device, and to which the desired mixture of the bulk material components is supplied from the supply containers by means of feed devices via an upper inlet. The object of the invention is to provide an apparatus such as this in which the ratio of the empty weight of the weighing container to the items being weighed is considerably improved, in order to increase the measurement accuracy. This object is achieved in that the mixing device (18) projects into the weighing container (10) from above, but is suspended free of the weighing container (10).

Abstract: The invention pertains to a scale for determining the mass flow rate of bulk materials in accordance with the differential principle. In order to decouple a receptacle (1) that is freely suspended on a weighing device (1b, 1c) and arranged upstream of a processing machine, in particular, an extruder (10), from the bulk material flowing from a filling funnel (2) arranged directly above the open-top receptacle (1), a bottom outlet (2b*) of the filling funnel (2) can be closed with a slide gate (5) that is supported in a pivoted fashion and provided with a downwardly directed stripping edge (5b) on its front end. During the pivoting of the slide gate, this stripping edge clears the material backing up directly underneath the slide gate and thusly ensures the aforementioned decoupling.