Manufacture of lightweight extruded structural profile

Details Manufacture of lightweight extruded structural profile Manufacture of lightweight extruded structural profile

B - Operations, Transporting

29

C

18/641

B29C 67/20 (2006.01) B28B 3/20 (2006.01) B29C 47/02 (2006.01)

Patent

CA 1244206

ABSTRACT OF THE DISCLOSURE In the manufacture of lightweight extruded structural profile comprising a resin-bonded core of closely compacted particulate filler, loose filler is packed into an extrusion die by means of applied vacuum. The filler is packed within a sheath of glass rovings which is used to draw the packed filler through the die. As the sheath and packed filler are progressed through the die, a liquid bonding resin is introduced to permeate and bond together the packed filler and the sheath. The filler comprises layer mineral foam in a coarse particulate form and a free- flowing relatively fine material (such as hollow silicate microspheres) as an additional filler, the additional filler being vacuumed in to occupy the interstices of previously packed foam filler.

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