| High quality blown film can only be produced using a high quality die. That's why Brampton Engineering places sjxxial emphasis on innovative die designs and precise die manufacturing techniques. Whether a two or three-layer coextrusion die our advanced designs ensure that all melt distribution takes place in the spirals. Cylindrical coextrusion dies are available in sizes up to 2130mm (84") diameter. These dies can process a variety of resins with different viscosities and melt temperatures. On new or existing film lines BE cylindrical dies will meet your needs up to three layers. For up to 10 layers inquire about Brampton Engineering SCD (Streamlined Coextrusion Die). Method of Operation The melt entering the die is divided into passages which feed the spirals (ports), one per spiral. Each port connects with a precision-machined spiral designed to minimize back pressure while maintaining excellent gauge unifomiity with minimum sensitivity to changes in resin formulation. All melt distribution takes place in the spirals. Streamlined flow passages enable processing of various material types and facilitate material changeovers to avoid degradation of heat-sensitive jxilymers. The Taper-Lock body and mandrels • eliminate the mechanical interference fit associated with spiral mandrels • make disassembly very easy • ensure excellent concentricity between the spiral mandrels and the die Ixxly. All these factors contribute to producing film of uniform gauge. The die can be equipped with stationery or oscillating block, The Brampton die oscillator incorporates a very compact self-storing cable system with redundant electrical safety protection to prevent cable wrap-up. The die-zone temperature-control instruments can be mounted on the extruder or at another remote location. |