Abstract: The invention relates to a calibrating device with at least one calibrating die (24), which has die faces (66) against which an extruded object fed therethrough is applied, in particular a section having several cavities, a sealing device (60, 62) being provided to seal off a gap (56) in order to form a cavity (59) and, having been formed, this cavity (59) is evacuated to a negative pressure lower than the ambient pressure, means being provided to form the gap (56) before the first end face (53) of the calibrating die (24) and at least one of the terminal edges (67) of the die faces (66) having part end faces (76) to form the gap (56) with a gap width (65) smaller than 1.0 mm.

Abstract: A method for cooling and if necessary calibrating elongate articles 7 of plastic, in which the article 7, during its continuous progress has flowing round it only a gaseous cooling medium 42 at a temperature of less than 100.degree. C. at least over a portion of its outer surface and extending over a pre-determinable length of the article 7, in a plurality of flow areas 25-35' separate from one another and located one behind the other in the extrusion direction, arrow 5.

Abstract: The invention describes a process for cooling and if necessary calibrating elongated, especially continuously extruded objects (7) made of plastic as well as a cooling and calibrating device (5) for carrying out the process. With this the object (7) during its advancement in the longitudinal direction is exposed in consecutive regions (13 to 18; 86 to 89, 95 to 97) to a higher vacuum in each case and is cooled with respect to the initial temperature to a lower final temperature. The heat to be removed for cooling is extracted by a coolant washing round the object (7).

Abstract: A dimensionally stable plastics section, for example a window section, formed from a plastics extrudate and being provided thereon with an extruded layer, for example a sealing or damping device or a protective strip, is manufactured by extruding the section, calibrating it, and cooling it to ensure its dimensional stability, heating part of the surface of the section, to which the layer is to be applied, extruding the layer onto the heated part of the surface of the section so that the extruded layer is bonded thereto and using a take-up device to grip the finished section to remove it.

Abstract: The calibrator for plate like extruded products, particularly a wall section composed of a plastic, comprises an upper portion, a lower portion connected to the upper portion and a gap for the extruded material formed between them, the upper and lower portions being pivotally connected on one side by a pivot member. To allow a rapid and easy closing and opening of this calibrator a pivoting member pivotally attached to these portions and positioned for locking of the upper with the lower portion is provided. Further in the calibrator a cooling means through which a cooling medium, for example water, flows is provided. For even more efficient cooling a snake like channel for the cooling medium running transverse to the extrusion direction is provided. Both the above features can be employed independently of each other or used jointly.

Abstract: The invention describes a process for cooling and if necessary calibrating elongated, especially continuously extruded objects (7) made of plastic as well as a cooling and calibrating device (5) for carrying out the process. With this the object (7) during its advancement in the longitudinal direction is exposed in consecutive regions (13 to 18; 86 to 89, 95 to 97) to a higher vacuum in each case and is cooled with respect to the initial temperature to a lower final temperature. The heat to be removed for cooling is extracted by a coolant washing round the object (7).