• Ideal for production, material testing, new product development and quality control purposes
• Used in various processes such as compounding, pelletizing, sheet extrusion, pipe extrusion, wire coating and blown film
• Available in 30mm, 40mm, 50mm, 60mm, 70mm, 80-83mm, 90-92mm, 120-133mm, 160-177mm and 240-260mm diameters
• A variety of standard and custom-designed screws and barrels are available for various applications
• Can be assembled in any combination to provide plasticizing of raw material feeding, ventilation or gas extraction
• Co-rotating intermeshing screws are arranged in parallel and are self-cleaning
• Screw geometry can be adapted to fit individual applications
• Modular design for unlimited flexibility in screw configuration
• Process design and alloy flexible design for a broad range of extrusion applications
• Hardened alloy steel or bimetallic cast liners increases durability for highly corrosive or abrasive materials
• Barrel end sections equipped with rupture disc port to protect against excessive pressure build up
• Twin screw barrels are divided into sections, which are designed for conveying/mixing, top feed, glass fiber feed, side feed, liquid gas/injection, pressure monitoring, venting and other custom ports
• Each standard twin screw barrel segment is made with cast aluminum or bronze heaters, and uses air or liquid cooling
• Screws are finished using either stainless steel or Dura-nickel, nitride hardening, chrome or plasma coating
• Combination barrel section provides multiple feeding of dry ingredients, and introduction of materials downstream with the CROWN Side Feeder

Venting/Side Feeding

• The combination barrel top port may be used for venting
• A variety of materials, metal treatments, and special wear liners are available to provide wear and corrosion resistance for specific applications
• Screw channels in the venting area are only partially filled with material, thus permitting efficient single or multi-stage venting
• A vacuum system with a separator installed on the extruder frame is easily accesible for cleaning and maintenance
• Vacuum and atmospheric venting removes moisture, solvents, and other volatile substances
• Side feeders are available in a wide variety of sizes and L/D ratios
• Available in nitrided, through-hardened, corrosion or wear resistant alloys
• Thoroughly inspected and tested to assure the highest quality
• High volume feed elements provide improved intake for material with poor feeding chracteristics
• Designed in a variety of lengths, pitches and pitch directions
• Kneading blocks constructed using several disks of equal or varying widths - Equidistant spacing results in precise shear, melt and energy control
• Kneading and mixing component order arranged for specific product needs
• Positive engagement of screw segments on the shaft enable individual replacement to maximize output