B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
B30B 11/22 (2006.01) B21C 23/21 (2006.01) B29C 47/00 (2006.01) B29C 47/74 (2006.01)
Patent
CA 2121765
ABSTRACT OF THE DISCLOSURE The invention provides an apparatus for treating material fed therein comprising a housing having two congruent bores extending through said housing, an inlet extending through said housing and into at least one of said congruent bores, a pair of non-intermeshing parallel or tangential co or counter rotating twin screws, each disposed within one of said bores, means connected operably to said screws for turning said screws, said screws having flow restricting means disposed on each of said screws, said bores having a nip region, said nip region being defined by the ratio of the height between a pair of imaginary parallel lines, said lines being parallel to a plane defined by the center lines of the bores, one of which imaginary lines would touch the top of the nip and the other of which would touch the bottom of the nip, divided by the bore diameter, said ratio being equal to or less than 0.38, and an outlet in said apparatus for discharging material fed to and worked in said apparatus. Also disclosed is a process for treating material in an extruder comprising the steps of introducing material into the reaction or mixing zone of an extruder having twin non- intermeshing co or counter rotating screws arranged parallel or tangential to one another and flow restriction means separating the mixing or reaction zone from a lower pressure zone downstream of the flow restricting means, adjusting the pressure in the reaction or mixing zone independent of the pressure in said reaction or mixing zone, moving material at an adjusted pressure from the reaction or mixing zone into the lower pressure zone and discharging material from said extruder through a discharge outlet.
Jerman Robert Edward
Raymond Paul Johnston
Satija Sunil
Gowling Lafleur Henderson Llp
Jerman Robert Edward
Raymond Paul Johnston
Satija Sunil
LandOfFree
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