Abstract: A method cuts an extruded pipe to length using a separating device. The separating device includes a separator rotating about an extrusion axis of the extruded pipe, the separator being rotatably mounted in the separating device, and cutting tools being arranged on the separator. The cutting tools are configured to carry out the separation. The method includes transferring energy to move the cutting tools. The energy is transferred from a stationary outer region of the separating device to a movable inner region of the separating device. The energy is transferred continuously or cyclically and the transferred energy is buffered in an energy storage device. The energy is transferred inductively or capacitively. A discharge time of the energy storage device is between 2% and 25% of a total separation cycle.

Abstract: A method cuts an extruded pipe to length using a separating device. The separating device includes a separator rotating about an extrusion axis of the extruded pipe, the separator being rotatably mounted in the separating device, and cutting tools being arranged on the separator. The cutting tools are configured to carry out the separation. The method includes transferring energy to move the cutting tools. The energy is transferred from a stationary outer region of the separating device to a movable inner region of the separating device. The energy is transferred continuously or cyclically and the transferred energy is buffered in an energy storage device. The energy is transferred inductively or capacitively. A discharge time of the energy storage device is between 2% and 25% of a total separation cycle.

Abstract: A separating device cuts an extruded pipe to length. The separating device has a separator that is rotatably mounted and rotates about an extrusion axis. Cutting tools are arranged on the separator and move in accordance with received energy. A rotating receiver is in the separator. An electromechanical drive is configured to move a carrier that supports a cutting tool. The electromechanical drive and the carrier are on the rotating receiver. An energy conductor is connected to a moving part of the rotating receiver, the energy conductor being coupled to an energy supplier arranged on the rotating receiver. The energy and control commands are transmitted to the electromechanical drive via the energy conductor and the energy supplier. The electromechanical drive, the carrier, or the cutting tool yield to a force counter to a separating force that is greater than a required separating force for cutting the extruded pipe.

Abstract: A calibration and cooling tank of an extrusion line, which connects to an extrusion tool, wherein a vacuum can be applied to the calibration and cooling tank for calibrating the plastic melt emerging from the extrusion tool, wherein the calibration and cooling tank extends along an extrusion axis. The calibration and cooling tank is modularly structured, wherein at least one module forms a calibration and cooling section and the module has a connection region on both sides to which an additional module can be attached. The connection region includes a flange that extends from the base element of the calibration and cooling tank to the outside.

Abstract: A device produces plastic pipes by extrusion, involving an extruder, a pipe head connecting to the extruder in production direction, having a base material, mandrel, and sheath. A melt channel, formed between the mandrel and sheath in production direction, promotes flow at least at the mandrel and sheath end, the mandrel and sheath being adjustable forwards and backwards relative to one another, and the outer mandrel surface and/or the inner sheath surface at least partially having a material with greater sliding capacity than the base material. Mandrel diameter at the end conically widens or narrows, and/or the mandrel end is curved so the diameter widens, narrows, or remains constant, and the inner sheath diameter at the end conically widens, narrows, or remains constant, and/or the sheath end is curved so the diameter widens or narrows, or two further surface sections, parallel and cylindrical, extend at the mandrel and sheath end.

Abstract: A device, and a corresponding method, for supporting and/or guiding a plastics profile in a calibration station and/or other downstream devices, has at least one support unit in the calibration station and/or in at least one of the downstream devices. The support unit has at least one support element, and the support element is disposed on a beam and can be moved in a parallel manner toward or away from the theoretical central axis, the extrusion axis.

Abstract: In an embodiment, the present invention provides a method for increasing the cooling performance of an extrusion line and for extruding a plastics profile, in particular a plastics tube, in an energy efficient manner, the method including the steps of: melting plastics material in an extruder; shaping a plastics strand and feeding the plastics strand to a die; shaping a plastics profile using the die; and calibrating and curing by cooling the profile in a cooling and/or calibration device, a gaseous medium being drawn through one or more cooling tanks in order to cool the outside of the profile. A temperature and a saturation of the gaseous medium is increased between an inlet region and an outlet region for the gaseous medium. A liquid medium is added between the inlet region and the outlet region using spray nozzles.

Abstract: A calibration and cooling tank of an extrusion line, which connects to an extrusion tool, wherein a vacuum can be applied to the calibration and cooling tank for calibrating the plastic melt emerging from the extrusion tool, wherein the calibration and cooling tank extends along an extrusion axis. The calibration and cooling tank is modularly structured, wherein at least one module forms a calibration and cooling section and the module has a connection region on both sides to which an additional module can be attached. The connection region includes a flange that extends from the base element of the calibration and cooling tank to the outside.

Abstract: An apparatus produces plastic tubes by extrusion with an extruder, a pipehead being attached to the extruder in production direction, having a base material with at least one mandrel and a sleeve, a melt channel between the mandrel and the sleeve, the melt channel shaped to aid flow in production direction at least at the mandrel's end and at the sleeve's end, the mandrel and sleeve being adjustable backwards and forward relatively to one another, the outer surface of the mandrel and/or the inner surface of the sleeve at least partially has a material that allows for a higher sliding quality than the base material. The outer and/or the inner surface (i) has a coating either unvaried, or whose sliding quality constantly improves, or whose sliding quality alternately improves and worsens, in the production direction, or (ii) is partially coated, or (iii) the mandrel and/or sleeve fronts are coated.

Abstract: A device for guiding and/or forming a plastics profile includes a region of alterable cross-section formed by a wound flat element. The wound flat element overlaps in a region and is in close mutual contact in the overlapping region. The wound flat element includes a flexible and resiliently deformable coating thereon. A device is provided for altering the region of alterable cross-section.

Abstract: A method for using the quantity of heat output from an extrudate during a cooling operation in an extrusion process, wherein a fluid, in particular air, is guided along the extrudate and/or through the die counter to an extrusion direction, at least some of the heat from the extrudate and/or the die is transmitted to the fluid, the heated fluid is supplied from a first sub region of a process chain, comprising at least one die, a calibrating and cooling device and a take-off apparatus, via a connecting region, preferably consisting of at least one connecting pipe, to a second sub region of the process chain, comprising at least one suction apparatus. In the connecting region, an extraneous fluid can be added to the heated fluid in order to reduce the actual temperature of the heated fluid at least below a predetermined maximum value before said fluid is supplied to the second sub region of the process chain.

Abstract: A device, and a corresponding method, for supporting and/or guiding a plastics profile in a calibration station and/or other downstream devices, has at least one support unit in the calibration station and/or in at least one of the downstream devices. The support unit has at least one support element, and the support element is disposed on a beam and can be moved in a parallel manner toward or away from the theoretical central axis, the extrusion axis.

Abstract: A device for sealing an extruded plastics material profile in at least one of an inlet region and an outlet region of a tank is disposed at an end face of the tank. The device includes a rigid element and a closed annular cross section formed of a resilient material and including a cavity. An outer peripheral shape of the annular cross section is disposed against the rigid element. The annular cross section is alterable by applying a vacuum to the cavity, wherein the annular cross section is configured to be applied to an outside of the plastics material profile. A stretching device is disposed against the rigid element and is configured to stretch the resilient material along an extrusion axis during an alteration of the annular cross section.

Abstract: An extrusion line for producing plastics material profiles includes an extruder, a calibration station, and an additional piece of downstream equipment. A mold includes an internal cooling system having a branch for a coolant disposed inside the mold; wherein a coolant flow distribution is controllable.

Abstract: An apparatus produces plastic tubes by extrusion with an extruder, a pipehead being attached to the extruder in production direction, having a base material with at least one mandrel and a sleeve, a melt channel between the mandrel and the sleeve, the melt channel shaped to aid flow in production direction at least at the mandrel's end and at the sleeve's end, the mandrel and sleeve being adjustable backwards and forward relatively to one another, the outer surface of the mandrel and/or the inner surface of the sleeve at least partially has a material that allows for a higher sliding quality than the base material. The outer and/or the inner surface (i) has a coating either unvaried, or whose sliding quality constantly improves, or whose sliding quality alternately improves and worsens, in the production direction, or (ii) is partially coated, or (iii) the mandrel and/or sleeve fronts are coated.

Abstract: A device produces plastic pipes by extrusion, involving an extruder, a pipe head connecting to the extruder in production direction, having a base material, mandrel, and sheath. A melt channel, formed between the mandrel and sheath in production direction, promotes flow at least at the mandrel and sheath end, the mandrel and sheath being adjustable forwards and backwards relative to one another, and the outer mandrel surface and/or the inner sheath surface at least partially having a material with greater sliding capacity than the base material. Mandrel diameter at the end conically widens or narrows, and/or the mandrel end is curved so the diameter widens, narrows, or remains constant, and the inner sheath diameter at the end conically widens, narrows, or remains constant, and/or the sheath end is curved so the diameter widens or narrows, or two further surface sections, parallel and cylindrical, extend at the mandrel and sheath end.

Abstract: A method for using the quantity of heat output from an extrudate during a cooling operation in an extrusion process, wherein a fluid, in particular air, is guided along the extrudate and/or through the die counter to an extrusion direction, at least some of the heat from the extrudate and/or the die is transmitted to the fluid, the heated fluid is supplied from a first sub region of a process chain, comprising at least one die, a calibrating and cooling device and a take-off apparatus, via a connecting region, preferably consisting of at least one connecting pipe, to a second sub region of the process chain, comprising at least one suction apparatus. In the connecting region, an extraneous fluid can be added to the heated fluid in order to reduce the actual temperature of the heated fluid at least below a predetermined maximum value before said fluid is supplied to the second sub region of the process chain.

Abstract: A device for guiding and/or forming a plastics profile includes a region of alterable cross-section formed by a wound flat element. The wound flat element overlaps in a region and is in close mutual contact in the overlapping region. The wound flat element includes a flexible and resiliently deformable coating thereon. A device is provided for altering the region of alterable cross-section.

Abstract: A device for sealing an extruded plastics material profile in at least one of an inlet region and an outlet region of a tank is disposed at an end face of the tank. The device includes a rigid element and a closed annular cross section formed of a resilient material and including a cavity. An outer peripheral shape of the annular cross section is disposed against the rigid element. The annular cross section is alterable by applying a vacuum to the cavity, wherein the annular cross section is configured to be applied to an outside of the plastics material profile. A stretching device is disposed against the rigid element and is configured to stretch the resilient material along an extrusion axis during an alteration of the annular cross section.

Abstract: An extrusion line for producing plastics material profiles includes an extruder, a calibration station, and an additional piece of downstream equipment. A mold includes an internal cooling system having a branch for a coolant disposed inside the mold; wherein a coolant flow distribution is controllable.