Patent ID: 6676395
Filing Date: 2004-01-13
Classification: B29C,B29K

Abstract:
Equipment for extruding an expanded polymer sheet or plate characterized in that it comprises a first apparatus for the gravimetric loading (11) of a certain number of component polymers, a second apparatus (18, 19, 25) for the gravimetric loading of fillers, an extrusion apparatus (17) consisting of a thermally controlled co-rotating twin-screw extruder (20), with a length ratio of at least 1/34 diameters, a loading pump (38) downstream of said extrusion apparatus, a static group (41) for the mixing and thermal conditioning of the mixture pumped, inserted in a thermo-regulated cartridge (42), a stratifier (44, 45) and a thermoregulated flat head (43) connected to a downstream portion of said stratifier and positioned at the outlet end of said equipment, wherein, in at least one portion of the extrusion apparatus (17), there is an injection zone (29, 32) into which gas coming from a container tank (30, 34), is introduced.