Machine Overview & Summary
The Ultraflex R75 (Welex) is a high-performance, 48-inch lip die / head module designed for integration into plastic sheet or film extrusion lines. Built around a licensed (U.S. Patent No. 3,890,032) design, this component provides controlled melt distribution and shaping of polymer flow prior to downstream cooling and sizing operations. Its rugged construction and modular design make it suitable for demanding industrial extrusion applications.
Specifications
- Model: Ultraflex R75 (Welex)
- Serial No.: 85-9435 / Welex
- Die width (lip span): 48 inches
- Patent reference: U.S. Patent No. 3,890,032
- Heavy metal construction with precision machined internal flow paths
- Mountable to standard extrusion line flanges
- Designed to accept heating zones or thermal control as needed
- Interfaces for seals, gaskets, and mounting hardware
Description
- Module receives molten polymer melt from upstream extruder or manifold
- Internal channels and manifold elements distribute melt evenly across the lip
- Molten polymer exits through the slot (lip) as a continuous sheet or film
- Downstream, sheet is cooled, sized, and wound or cut to final dimensions
What It Does
- Provides even melt distribution across the full width of the die
- Shapes molten polymer into uniform sheet or film
- Dampens flow variations, surges, or pressure imbalances
- Helps deliver consistent thickness quality across width
- Interfaces with upstream and downstream extrusion components
Core Functions
- Feed equalization and balancing of pressure/flow
- Flow smoothing and suppression of turbulence
- Gap control via lip geometry and adjustment
- Edge control or bleed-off (if fitted) to reduce edge distortions
- Structural rigidity to maintain flatness under thermal/mechanical stresses
Design Features & Benefits
- Patented internal manifold design for superior uniformity
- Serviceable internal parts (shims, inserts, manifold plates)
- Rigid frame to preserve die gap consistency
- Ability to adjust or remove bottom or top lip pieces for maintenance
- Edge control provisions (bleed slots, dams) to reduce defect formation
- Broad thermoplastic compatibility (PE, PP, PET, PVC etc.)
- Good thermal stability and minimal gradient effects
Capabilities
- Produces sheet or film up to 48 inches wide
- Maintains high uniformity in thickness and flatness
- Adjustable for changes in throughput or material conditions
- Handles a wide range of melt temperatures (depending on polymer)
- Long service life in continuous industrial usage
Applications & Industries
- Plastic sheet and film extrusion
- Packaging film / barrier sheet manufacturing
- Construction materials (sheeting, paneling)
- Electrical insulation, signage substrates, display films
- Lamination, coating, composite sheet fabrication
- Contract extrusion, pilot lines, retrofit markets