Extruding polystyrene foam with variation of mass distribution

Details Extruding polystyrene foam with variation of mass distribution Extruding polystyrene foam with variation of mass distribution

B - Operations, Transporting

29

C

18/663

B29C 44/22 (2006.01) B29C 51/00 (2006.01)

Patent

CA 1054764

ABSTRACT OF THE DISCLOSURE A thermoplastic foamed resin extruding operation is described which uses an inner die lip machined to vary the width of the die annulus or opening so that varying thicknesses or mass concentrations of preselected desired width will be formed in the extruded resin sheet obtained therefrom. The mass concentration variations in the extruded sheet are coordinated with a downstream thermoforming operation involving deep and shallow draw forming or different sheet fabrications such as folding, scoring, cutting, etc.

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