DEVICE FOR FILTRATION OF POLYMER MELTS Russian patent published in 2014 - IPC B29C47/68 

FIELD: metallurgy.

SUBSTANCE: proposed device comprises casing with inlet, outlet and drain channels, heaters arranged on casing outer surface, filter unit built in said casing communicated with casing channels. Said casing is composed by hollow steel cylinder. Filter element is composed of cartridge consisting of replaceable filter element, bearing grate, drain cylinder, head and cartridge flange. All cartridge elements apart from replaceable filter element are assembled to integral one-piece unit. Drain cylinder is composed of all-metal rod connected with cartridge flange on one side and, on opposite side, with cartridge head. Drain cylinder outer surface is coated with truncated pyramid elements. On one side of drain cylinder turning of pyramidal elements does not extend to the edge for cylinder to have smooth surface at said point. Replaceable filter element represents a woven steel screen wrapped and tightened around bearing grate. Bearing grate is composed of perforated steel sheet rolled to cylindrical shell. Cartridge head is composed of steel cylinder composed by piston with holes made in circle. Cartridge flange represents a blank metal disc made so that cartridge of which said disc is a part can be fitted in and out many times and is tightly secured to the casing. Casing flange is a metal disc. There is the joint with cartridge flange on one side and with casing flange on opposite side. Both ends of the casing have circular groove for dowelled joint.

EFFECT: higher efficiency.

2 cl, 4 dwg