PULTRUSION FORMING OF FOAMED PANELS

摘要

A foam filled plastic panel is formed through a pultrusion process. A moldable panel wall forming material is pulled by a caterpillar pullet through a die to produce a box structure. As the box structure is pulled into the caterpillar pullet a foam forming mixture is injected into the box like structure. The foam foaming mixture expands to produce a foam filler within the box structure which urges outward expansion of the box structure onto the interior grip region of the caterpillar pullet. The expanding of the foam forming mixture further prevents inward collapsing of the box structure which is under pressure while it is being puller through the caterpillar puller.