PVC profile production line: PE/PP plastic profile extrusion machinery can be used to manufacture decorative trims and capping strips for the office furniture and kitchenware industries, as well as cable trunking, door edging, skirting boards, and louvers for the architectural decoration sector. With such a broad range of applications, this production line is suitable wherever small‑section profiles are required. The PVC profile production line and PE/PP plastic profile extrusion equipment offer both co‑rotating conical twin‑screw and a variety of single‑screw extrusion options.

PVC profile production line; PE/PP plastic profile extrusion machinery

1. Extruder Section: This machine is equipped with a metering feed system that ensures the extrusion rate matches the feed rate, enabling stable production. Thanks to the conical twin-screw design, the feeding section features a larger diameter, providing a greater heat-transfer surface area and higher shear rates, which facilitate material plasticization. In contrast, the metering section has a smaller screw diameter, reducing both the heat-transfer area and the shear rate on the melt, thereby allowing extrusion at lower temperatures. As the screws rotate within the barrel, they plasticize the PVC compound and convey it toward the die head, achieving compaction, melting, and uniform mixing, while also facilitating venting and dehydration. The feed system and screw drive are both controlled by variable-frequency drives, enabling synchronized speed regulation.

2. Die Head Section: The PVC, which has been compacted, melted, and homogenized through mixing, is conveyed by the screw to the die head; the extrusion die head is a critical component in pipe forming.

3. Vacuum Forming Table Cooling Unit: This component comprises a water tank, frame, vertically and horizontally adjustable lifting mechanism, stainless steel water tank, and stainless steel vacuum chamber. The vacuum forming table serves to stabilize the predetermined shape of the plastic extruded from the die and to refine it, yielding products with precisely controlled cross-sectional dimensions and a smooth, glossy surface. The cooling and shaping system of the vacuum forming table determines the dimensional accuracy of the finished product and is also a key factor influencing extrusion speed. The operation buttons, vacuum‑level switch ball valve, water pressure gauge, and vacuum gauge are all mounted on the panel of the vacuum forming table, ensuring convenient, intuitive operation. Quick‑connect fittings and control ball valves are properly aligned and securely connected to the mold, enabling fast and accurate coupling.

4. Traction Unit: Equipped with variable-frequency drive for continuous, automated extraction of cooled and hardened profiles from the die head, ensuring energy savings and stable, long-lasting performance.

5. Cutting Machine Section: After the limit switch controls the cut according to the required length, the machine performs automatic cutting and, following a delay, flips the workpiece over, enabling continuous production. The cutting machine uses a fixed-length limit switch signal as its command to complete the entire cutting process, maintaining synchronization with the profile’s forward motion throughout. The cutting operation is driven by both electric and pneumatic systems. Additionally, the machine is equipped with a dust-extraction system that promptly removes and recovers the chips generated during cutting.

6. Material‑turning mechanism: The material‑turning action is controlled by a pneumatic cylinder via the air‑supply system. The turning rack is equipped with a limit switch; after the cutting saw has severed the profile, the material continues to be conveyed. Following a delay, the cylinder activates to perform the turning operation, thereby completing the unloading process. After unloading, the system automatically resets after a few seconds of delay, awaiting the next cycle.