Edged filters

Filtering discs are used with edge when they have both a filtering and sealing function. Each edged filtering disc can be made from an appropriately punched single wire cloth or from a sequence of several cloths. For these filtering discs the number and the characteristics of each cloth and their sequence must be defined. Before punching, the cloths are tested and, where necessary, stabilised; after punching, the cloths and their edges are ultrasonic cleaned.

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The wire cloths used to make the filtering discs may be made from any metal and alloy that can be drawn into wire. The ones normally used and generally available in stock are in carbon steel or in AISI 304 or 316 stainless steel.
The edging can be in Aluminium and Aluminium alloys, stainless steel, Brass, Copper, Nickel-plated Copper.


After assembly, the finished filtering discs are ultrasonic cleaned again and packed in standard or special vacuum packs.


The main application of these products is on spinning machines heads for the extrusion of plastics, synthetic fibres and other polymers; however, they are also used for the extrusion of rubber sheaths for electric cable compounds and in filters for hydraulic circuits.


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