C.a. Greiner & Sohne Gesellschaft M.b.h.

Schaumstoffwerk Greiner Gesellschaft M.b.h.

Franz Purstinger

Frank Dorninger

Method for cooling and if necessary calibrating articles of plastic

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). The individual regions (13 to 18; 86 to 89, 95 to 97) in the transport direction of the object (7) are separated from each other from the covering plate (35) or the base plate (43) to the height of the object (7), whereupon by means of the vacuum a coolant on one longitudinal side of the section is drawn into a chamber of the region and is raised over the upper edge of the object (7) or a support diaphragm (81) extending transversely to the longitudinal direction from the base plate (43) to approximately the height of the object (7). The coolant overflows into a flush chamber (46; 102,107) located on the opposite longitudinal side of this region (13 to 18; 86 to 89, 95 to 97) or of the object (7) or of the support diaphragm (81) through an immediately following region (13 to 18; 86 to 89, 95 to 97) in the extrusion direction and is thereafter drawn into the tank (22) or into this following region (13 to 18; 86 to 89, 95 to 97).

Process for cooling and calibrating elongated objects made of plastic

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.

Growing community of inventors

Bad Hall, Austria

Franz Purstinger