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CPM’s newest sidefeeder is designed to match the requirements of feeding low bulk density fillers and materials in the compounding process. The design focuses on applying vacuum on a microporous filter in-liner, which can be frequently back flushed and installed into a standard side-feed barrel. The filter element will avoid any blocking of the vacuum unit by emerging powder/particles and can be manually back flushed by compressed air.

The vacuum level is adjusted according to the bulk density of the material to achieve the most efficient conveying effect of the low bulk density material. The liner is divided into two vacuum sections which are controlled individually to enable continuous densifying during purging cycles.

Benefits include:

• Improved feeding efficiency for low bulk density materials;
• Double vacuum chamber for continuous densifying effect;
• Enlarged vacuum surface area;
• Automated suction/back flushing controls;
• Fast and easy adaption to any machine;
• Wear protection;
• Fast changeover time with quick removable system; and 
• System available with screw diameter from 25 mm to 120 mm.