200+120 Power Cable Jacket Extrusion Lines

The 200+120 Power Cable Jacket Extrusion Line is a heavy-duty co-extrusion system specifically configured for the outer sheath and jacket application on high-voltage power cables, where both the scale of material throughput and the precision of sheath thickness control are critical to product performance and compliance. The designation refers to the pairing of a 200mm primary extruder with a 120mm secondary extruder in a tandem arrangement, providing the combined melt output volume needed to apply consistent, adequately thick jacket layers to large-diameter HV cable constructions at production-viable line speeds. This line is designed to operate downstream of JLK-type stranding lines, receiving the stranded, insulated, and screened cable core directly from the prior production stage and applying the final protective jacket in a continuous process. This inline configuration eliminates the handling, storage, and re-reeling steps that would otherwise be required between stranding and sheathing, reducing both cycle time and the risk of physical damage to the cable core during intermediate transfer. The range of applicable extrusion materials is broad, encompassing PVC, PE, LSZH, LDLH, semiconducting PVC, and semiconducting PE — covering the material requirements for outer sheath, inner bedding, and metallic screen coverage layers across a range of medium- and high-voltage cable construction standards. The ability to process semiconducting compounds inline is particularly significant for HV cable production, where the application of semiconducting layers to defined thickness tolerances is a certification-critical process step. Melt temperature uniformity across the full circumference of the cable jacket is maintained through a precision-engineered rotary cross-head and die system designed for large cable diameters, preventing the localized thin spots or material flow imbalances that would compromise jacket integrity under installation bending and long-term service loading. This line is designed for manufacturers producing medium-voltage distribution cables, HV transmission cables, and submarine cables where sheath quality is subject to IEC 60840, IEC 62067, and other high-voltage cable standard requirements.