blown film and cast film extrusion screws

The screw is the heart of the extruder and a key component of any film extrusion system. The screw melts the polymer, prepares the homogeneous melt and pumps the melt through the die. Special attention needs to be taken into account while designing screws for the film extrusion process, particularly for multilayer barrier film extrusion, due to both the complexity of the process and the complex rheology of the materials being processed.
Yashi Screw manufactures extrusion screws and barrels for single layer, 3 layer, 5 layer, 7 layer, ABA blown film extruders and extrusion lines.
Highly wear-resistant high-performance Screws are manufactured in a wide variety of steels and alloys including 4140HT, 4340HT, Nitralloy 135-M, 17-4PH Stainless, PMM4, PM 9V & PM 420, Elmax, Inconel & Hastelloy. Hard Faced Welded flights with cobalt-based Stellite and Nickel-based Colmonoy materials. Through hardened screws are also available. 
Base Material: AISI SAE 4140, 38CrMoAlA, JIS SACM645, DIN 1.8509, 34CrAlNi7, DIN 1.8550, BS EN41B, etc.
Film type: agriculture film, barrier film, packaging film, mulch film, geomembrane, geotextile, etc.
Polymers: HDPE, LDPE, LLDPE, PP, PVC, BOPP, etc.
Machine Makes: Alpha Marathon, Bandera, Brampton Engineering, Carnevalli, Davis-Standard, Hosokawa Alpine, Jinming Machinery, Kuhne, Kung Hsing Plastic Machinery, Lung Meng, Macchi, Macro Engineering, Nextrom, ,Polystar Machinery, Reifenhäuser, SML Extrusion, W&H(Windmoeller & Hoelscher), Zocchi Giovanni, etc.
Cast Film: Battenfeld Gloucester, Colines, Dolci Extrusion, Gloucester, Nextrom, Reifenhäuser, SML, SMS Folientechnik, Windmöller & Hölscher, etc.