Types of Extruder Screens
- Rimmed or Framed Extruder Screens (Filter Discs): These screens, featuring mesh secured by a metal frame, offer rigidity for high-pressure extrusion. They’re durable, reusable, and prevent deformation, simplifying handling.
- Single-Layer Extruder Screen: Constructed from single stainless steel mesh sheets, these provide basic, cost-effective filtration for low-contamination tasks. They’re easily replaced, suited for simple plastic and rubber processing.
- Multi-Layer Screen Packs: Comprised of layered mesh with varying sizes for progressive filtration, these enhance strength and efficiency. They remove fine particles while maintaining flow, ideal for high-performance extrusion.
- Spot-Welded Screen Packs: Multiple mesh layers fused at points ensure uniform filtration under pressure. Their stable design prevents layer shifting, providing consistent particle retention and easy replacement.
Shapes of Extruder Screens
- Circle: Circular screens, common for standard setups, range from 1 to 10 inches. They ensure even pressure and fit most extrusion filters.
- Disc: Flat, round disc screens provide uniform filtration. Diameters span 2 to 8 inches, with custom sizes available for various extrusion equipment.
- Square: Square screens offer larger filtration areas. Common sizes are 2×2, 4×4, and 6×6 inches, with custom options for specific housings.
- Oval: Oval screens suit specialized, non-standard machinery. Sizes include 1.5×3 and 2×4 inches, and custom ovals fit unique extrusion systems.
- Rectangular: Rectangular screens, for continuous flow, range from 2×4 to 6×12 inches. They optimize flow in linear extrusion setups.
- Kidney: Kidney-shaped screens, for niche tasks, fit custom machines. Sizes are about 2×3 or 3×5 inches, for irregular filtration layouts.
- Cones: Cone-shaped screens offer depth filtration. Base diameters range from 2 to 6 inches, with varied heights, for compact, efficient separation.
- Special Shapes: Ring, star, or crescent screens fit specialized equipment. Sizes vary by client needs, ensuring precise compatibility.
General Specifications: Stainless Steel Extruder Screens
- Material: Stainless Steel 304, 304L, 316, 316L (alternative grades available upon request).
- Weaving Method: Options include Plain Weave, Twill Weave, Dutch Weave, and Reverse Dutch Weave.
- Mesh Size: Available from 10 mesh to 500 mesh, with examples such as 10×10, 30×30, 80×80, 150×150, and 325×325.
- Wire Diameter: Typically ranges from 0.03 mm to 0.5 mm, varying with mesh size.
- Screen Layers: Configurations include single-layer, double-layer, and multi-layer (commonly 3 to 7 layers).
- Screen Shapes: Options include circular, disc, square, oval, rectangular, kidney, cone, and custom shapes.
- Surface Treatment: Options include polished, deburred, and electrolytic polishing (application-dependent).
- Edge Construction: Available with plain edges, rimmed edges (aluminum or stainless steel frames), or spot-welded.
- Screen Pack Thickness: Varies based on layer count and mesh type, generally ranging from 1 mm to 6 mm.
- Packaging: Standard packaging includes plastic bags within moisture-proof cartons or wooden cases; custom labeling and export packaging are available.
- Applications: Suitable for plastic extrusion, rubber processing, polymer filtration, blown film, and recycling machinery.
Typical Design of Extruder Screens
