PVC High-Speed Profile Extrusion Line

Based on actual installation cases, the YF240 series is widely used for:
Door and window profiles (e.g., casement frames, sliding sash) – The YF240A model features dual 150mm discharge channels, making it particularly suitable for simultaneous production of small decorative lines.
Cable trays and wire conduits – Stable cooling water consumption (7–10 m³/h) ensures precise dimensional control.
Furniture edge banding – Compressed air consumption of 0.6–0.8 m³/min enables clean, burr-free cutting.
Greenhouse and agricultural profiles – High extrusion output (up to 500 kg/h) meets large batch order demands.
Case study: A Turkish door and window profile manufacturer replaced two old production lines with one YF240A (SJP110/28) and achieved an output of 400 kg/h when producing 60mm frame profiles, reducing energy costs per ton by 18%.

Incoming material inspection

PVC resin, stabilizers and fillers are tested for moisture content (<0.3%) and particle size distribution using a vibrating screen.

In-process monitoring

·Temperature control: Each barrel zone (4-6 zones) maintains ±1.5°C accuracy via PID controllers.

·Melt pressure sensor: Alarms if pressure exceeds 35 MPa to prevent die drool.

·Vacuum calibration tank: Water temperature and vacuum level (0.6–0.8 bar) are recorded every 30 seconds.

Profile dimension inspection

Laser micrometers measure width (e.g., 240mm ±0.1mm) and thickness at three points every 5 meters.

Example: For the YF240A producing 150mm dual-strand profiles, automatic cameras inspect both strands simultaneously and reject non-conforming parts via a pneumatic diverter.

Mechanical and physical performance tests (sampling every 2 hours)

·Impact resistance: Drop hammer test (1 kg weight dropped from 1m height) – no cracks = pass.

·Heat shrinkage: 30 minutes in 150°C oven – shrinkage <2%.

·Shore D hardness: ≥78 required for door and window profiles.

·Final production line audit

24-hour continuous run test: extruder load fluctuation <5%, cooling water outlet temperature rise <8°C.

Real quality event: A customer in Brazil achieved an actual defect rate of 0.3% after 6 months of operation on a YF240 (SJP93/28/31), verified by third-party ISO 9001:2015 audit.

Q1: What is the actual output of the YF240 equipped with SJP75/28?
A: For standard uPVC door/window profiles (240mm width), the stable output is 220–240 kg/h. With optimized screw design and addition of 2% calcium stearate, peak output can reach 250 kg/h.

Q2: What footprint does the YF240A require?
A: 28m (L) × 2.5m (W) × 2.2m (H), including haul-off and cutter. The dual-strand configuration adds 0.8m to the width.

Q3: Can this line use recycled PVC?
A: Yes, up to 30% recycled material (particle size <4mm). Barrel temperature should be lowered by 5–10°C to avoid degradation. A recycler in Malaysia successfully processed 40% post-industrial PVC waste after changing the screen pack combination.

Q4: How often should the cooling water be replaced?
A: Every 400 operating hours if using soft water (pH 6.5–7.5). For hard water (>15°dH), descaling agent must be used monthly – otherwise water channels will clog, reducing cooling efficiency by 15%.

Q5: What causes "sharkskin" on the profile surface?
A: Usually due to low melt temperature (<170°C at die exit) or mismatched haul-off speed. Increase rear barrel zone temperatures by 5°C, or reduce line speed by 10%. Plant data shows that keeping screw speed between 60–85% of maximum eliminates this issue on the YF240A.

Q6: Can your extrusion line produce foamed PVC profiles, such as interior decorative lines or louver blades?
A: Yes, but with appropriate adjustments to the screw and temperatures.

Under standard configuration, both YF240 (SJP75/28) and YF240A (SJP110/28) are suitable for low-foam PVC (density 0.6–0.9 g/cm³).

Actual case: A louver factory in Mexico used the YF240A (dual 150mm discharge) to produce foamed louver blades, achieving a stable extrusion rate of 380 kg/h with a foaming ratio controlled at 1.8x.

Key adjustments:

Increase screw cooling water flow by 15–20% to prevent premature foaming.

Reduce die temperature by 5–8°C (typically set to 165–170°C).

For 75 kW main motor models, keep screw speed below 75% to avoid shear overheating.

If the customer requires high foaming (density <0.5 g/cm³), a dedicated foaming screw and calibration sleeve are recommended.

Q7: Can this machine quickly change product width without stopping? For example, from 240mm to 120mm?
A: Yes, the changeover time is approximately 20–30 minutes, depending on operator proficiency.

Steps:

Reduce main screw speed to below 50% and turn off the vacuum calibration table.

Change the die (requires quick-clamp flange – optional).

Adjust the calibration die and haul-off track width (YF240 haul-off opening range 80–260mm).

Restart and wait 5–8 minutes for pressure to stabilize.

Real case: A door/window factory in Poland switches between 240mm frame profiles and 120mm sash profiles 2–3 times per day. The YF240 (SJP93/28/31) averaged 22 minutes from stop to good output, with scrap length under 15 meters.

Time-saving tip: Pre-heat the second calibration die in a warming oven (70°C standby) to reduce thermal stabilization time by 5 minutes.

Note: For frequent changes with width differences exceeding 100mm, the YF240A dual-line model is recommended – one line for large profiles, the other for small profiles, eliminating the need to stop for changeover.