This PE sheet/board extrusion line is built around a modular machine configuration. The primary extruder can be selected from three options depending on material and output requirements: the SBJZ-series single‑screw unit specifically designed for plates and sheets, the SJZ-series conical twin‑screw extruder, or the SJ-series parallel twin‑screw extruder. When coupled with appropriate downstream ancillary devices and forming dies, the system is capable of processing a wide array of thermoplastics, including PP, PS, HIPS, PE, ABS, EVA, PMMA, PC, PT, PVB, PVC, and other sheet‑grade resins.
The complete equipment train comprises the following stations: an extruder, a screen‑changer, a melt pump, a T‑shaped die, a three‑roll or multi‑roll calendering unit, a cooling section, edge‑trimming knives, a pull‑roll haul‑off assembly, a flying‑knife cutter or winder, and a centralized electrical control panel.
In terms of operational principle, the process relies on the three physical states that thermoplastics exhibit at different temperatures. Under the mechanical thrust of the screw, the raw material transitions from a glassy state to a highly elastic condition, and finally to a viscous fluid state. This molten mass is then forced through the narrow gap of the die. Subsequent steps involve calendering, cooling and shaping, trimming of side edges, traction, and finally cutting into fixed lengths or winding into rolls.
The line is also suited for producing specialty profiles such as PC and PP hollow‑section panels, transparent PVC sheets (both flexible and rigid grades), PVC foamed boards, PMMA/ABS co‑extruded bath panels, inner liners for refrigerator compartments, as well as various multi‑layer composite co‑extruded sheets. The achievable product dimensions range from 300 mm to 700 mm in width, with thicknesses spanning 0.2 mm to 45 mm. Throughput rates vary between 80 and 1,800 kg per hour, depending on material and configuration.
Overall, this machinery package represents an optimum choice for manufacturers seeking a versatile, high‑performance solution for producing plastic plates and sheets across a broad spectrum of applications.
