A method for manufacturing a foam board

摘要

A rigid polymeric insulating foam board is manufactured by forming a panel sandwich comprising a lower substrate (1), an upper substrate (2), and foam layer (3) between the substrates (1,2). At or just after the foam gel time and before the foam tack-free time the upper substrate (2) is punctured by a spiked roller (20) to provide a pathway for gas release from the panel. Air streams are applied to substantially remove dirt and grit particles from the foam receiving faces of the substrates (1,2). The foam may be laid down across at least 10% of the width of the substrate (1) by a lay down head (58) in the shape of a fish tail. A stacking system for stacking the foam boards is also described.