PVC Foam Board Extrusion Production Machine Introduction
Equipment Components
PVC foam board production lines typically consist of the following six modules:
① A dedicated conical twin-screw extruder (SJZ80/156 or SJZ92/188, etc.) equipped with a seven-stage pineapple-shaped foaming screw, DC/variable frequency speed control, and an imported temperature controller, achieving a 24-hour output of 350–600 kg/h.
② A coat-hanger-style sheet die with manual or hydraulic fine-tuning of the die lip and oil flow control via a mold temperature controller ensures uniform thickness and excellent crusting.
③ A vacuum setting table (4–8 sets of setting plates) with pneumatic or hydraulic cylinder opening and closing and a forced cooling device ensures stable sheet dimensions.
④ A crawler or eight-roller haul-off with variable frequency speed control provides high traction and smooth operation.
⑤ A precision cutter and automatic stacker ensure smooth, damage-free cuts.
⑥ Auxiliary equipment: a loader, dryer, hydraulic screen changer, and waste recycling system, all of which can be fully PLC-controlled. Centralized control.
Foaming Process
Celuka (Crusted Foam) technology: A hard skin forms on the surface, while the core foams, resulting in a smooth surface and high hardness. Its mechanical properties surpass those of free-foam board.
Free-foam: A lower density and slightly rougher surface are primarily used for advertising boards, engraving, and other applications.
Co-extrusion: A rigid PVC skin is co-extruded over the foam core to further enhance surface hardness and wear resistance.
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