Window frame and door frame profile extrusion lines are essential in the production of PVC profiles, which are categorized into single-cavity, double-cavity, triple-cavity, and multi-cavity types. These profiles can also be reinforced with steel to enhance durability. High-quality multi-cavity profiles significantly improve thermal insulation, wind resistance, and soundproofing, making them suitable for high-rise buildings, cold climates, and noisy environments.
Window frame extrusion lines include:
1. SJZ series conical twin-screw extruder
2. YF series vacuum calibration table
3. YF series haul-off unit with film wrapping device
4. YF series cutting machine
5. YF series tilting stacker
6. Profile laminating machine (optional)
Note: Door frame profile extrusion lines are similar to window frame lines but often use PVC wood-plastic foam to reduce weight. Screw designs and molds for door frames differ slightly from those used for window frames.

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