Method for continuously manufacturing foamed plastic profiles

Abstract

Abstract A METHOD FOR THE CONTINUOUS MANUFACTURE OF FOAMED PROFILES OR SECTIONS OF A THERMOREACTIVE RESIN, SUCH AS A URETHANE RESIN COMPRISING THE STEPS OF CONTINOUSLY INTRODUCING A THERMOPLASTIC OR METALLIC CARRIER WEB INTO AN OPEN TOP METALLIC CARRIER SECTION HAVING A CROSS-SECTIONAL SHAPE CORRESPONDING TO THE CROSS-SECTIONAL SHAPE OF THE FOAMED PROFILE TO BE MADE. THE THERMOPLASTIC CARRIER WEB IS PREFOLDED OR PRECEASED ACCORDING TO THE CROSS-SECTIONAL SHAPE OF THE PLASTIC PROFILE TO BE MADE, PRIOR TO THE INTRODUCTION OF THE WEB INTO THE CARRIER SECTION, TO CAUSE THE WEB TO SNUGLY INTO THE INTERIOR OF THE CARRIER SECTION. THE CARRIER SECTION WITH THE CARRIER WEB IS THEN MOVED UNDERNEATH AND PAST A MIXING HEAD FOR THE REACTIVE RESIN MIXTURE WHICH FLOWS OUT INTO THE CARRIER WEB. IMMEDIATELY THEREAFTER A COVER STRIP IS MOVED OVER THE OPEN TOP CARRIER SECTION TO CLOSE THE SECTION WHILE THE RESIN MIX THEREIN IS FOAMING. THE CLOSED CARRIER SECTION IS THEN HELD UNDER PRESSURE UNTIL FOAMING IS TERMINATED AND THE FOAMED PROFILE HAS HARDEND AND CAN BE REMOVED FROM THE CARRIER SECTION. THE CARRIER WEB CAN FULLY OR PARTLY SURROUND THE FOAMED PROFILE. THE CARRIER WEB CAN CONSIST OF DIFFERENT THERMOPLASTIC MATERIALS, OR OF METAL SUCH AS ALUMINUM FOILS OR SHEETS.

Inventors

• 👤 Andre Schaerer

Bibliographic Details