| 摘要 |
An apparatus for the continuous and nondestructive production of plastic panels which are provided with undercut anchoring studs, web profiles or other forms of attachment ( 28 ) on one or both surfaces comprises a temperature-controlled chill roll ( 11 ), which has peripheral cooling bores ( 15 ) in the roll body ( 17 ). The roll body ( 17 ) is formed at the circumference as a polygon with flat supporting surfaces ( 25 ), against which the molding/demolding strips ( 13 ) are placed or from which they are lifted. The molding/demolding strips ( 13 ) are moved by means of piston/cylinder arrangements ( 16 ) and piston rods ( 18 ). The piston rods ( 18 ) move through transverse bores through the roll body ( 17 ). The melt is filled into molds ( 27 ) of the molding/demolding strips ( 13 ) by the counterpressure between the shaping roll ( 11 ) and a counterroll ( 10 ) and is cooled down. During the filling of the molds ( 27 ), the molding/demolding strips ( 13 ) are pressed against the flat faces of the roll body ( 17 ). After cooling down, the plastic panel ( 20 ) produced, with anchoring studs ( 28 ) or other forms, is released in a nondestructive manner by opening the molding/demolding strips ( 13 ). A plastic panel produced on such a calender ( 3 ) has undercut attachments ( 28 ), which are formed integrally with the plastic panel ( 20 ). |
