The filtering discs are used without edge when they only have a filtering function and not a sealing one. Each filtering disc without edge is made from a single wire cloth, appropriately punched or shaped by means of plasma or laser cutting, whose characteristics have to be defined (mesh opening, diameter of the wire and material).
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Materials
The wire cloths used for the filtering discs can be made from any metal and alloy that can be drawn into wire; however, the ones normally used and generally available in stock are in carbon steel or in AISI 304 or 316 stainless steel.
Supply
Before punching, the cloth is tested and, where necessary, stabilised; after punching, the filtering discs are ultrasonic cleaned and packed in standard or special vacuum packs.
Use
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, in filters for hydraulic circuits and in cocoa processing.
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