Maag Pump Systems Textron, Charlotte, N.C., has adapted "candle filters" for extrusion. Each "candle" is a tubular sheet of filter material with pleated projections. Very long (2 to 3 ft) filters are commonly used to filter high volumes in polymer and textile production. For everyday plastics extrusion, Maag has made versions only 3 to 4 in. long that fit standard piston-type screen changers. The candles create 20 times larger filtration area than the flat screen opening it fits into. The filter media is either screen mesh or hard or soft metal felt. It can be cleaned commercially in the same manner as the longer versions.
Maag Pump Systems Textron Inc.
2915 Whitehall Park Dr. #600 Charlotte, NC 28273
Phone (704) 716-9000 Fax (704) 716-9001