PVC Price Tag Strip Extrusion Line

Overview

The PVC Price Tag Strip Extrusion Line is a complete turnkey system engineered for high-volume production of rigid PVC price tag strips, shelf label strips, and retail display strips. Built around a single-screw extruder platform (Φ45–65 mm), the line integrates a precision multi-cavity die head for simultaneous multi-strip output, vacuum calibration with movable cooling track for consistent dimensional control, servo-driven haul-off with closed-loop speed synchronization, and a combined cutting-and-punching station delivering ±0.5 mm cut-length repeatability. An automatic pneumatic stacking rack eliminates manual handling between cycles. With Siemens PLC-based recipe management, operators switch between strip profiles and sizes in minutes — making this line the backbone for manufacturers supplying retail chains, supermarket fixtures, and point-of-sale display systems worldwide.

Technical Parameters

Capacities measured with rigid PVC compound; actual output varies by strip profile, wall thickness, and material formulation.

System Configuration

Core Features

1. Multi-Strip Simultaneous Extrusion

The multi-cavity die head enables parallel production of 2–6 strips from a single extruder, multiplying throughput without proportionally increasing energy consumption or floor space. Each cavity features independently adjustable lip gaps, allowing fine-tuning of individual strip thickness while maintaining a common melt supply from the single-screw extruder. This architecture is particularly advantageous for high-volume price tag strip manufacturing, where multiple identical profiles are the norm. Combined with a plastic heating mixer for consistent dry blend preparation, the system delivers uniform output across all cavities.

2. Servo-Driven Precision Haul-Off

An AC servo motor drives the haul-off unit, with real-time speed feedback synchronized to extruder screw RPM via the central PLC. This closed-loop architecture maintains ±0.3% speed stability, ensuring consistent strip tension and dimensional control across the full line-speed range. Unlike open-loop VFD haul-off systems that drift under load changes, servo control compensates for belt wear, melt viscosity variation, and startup transients — directly translating to tighter product tolerances and reduced scrap.

3. Vacuum Calibration with Movable Cooling Track

The stainless steel vacuum calibration tank employs precision sizing sleeves under negative pressure (≥ -0.08 MPa) to lock strip dimensions during the critical solidification phase. The bottom track moves longitudinally to position the calibration zone at the optimal distance from the die exit, accommodating different strip profiles and cooling requirements. A temperature-controlled water circulation system — optionally supported by an SML series chiller — maintains bath temperature within ±1 °C, achieving strip width tolerance of ±0.1 mm on finished product.

4. Integrated Cutting and Punching Station

Length cutting and mounting-hole punching are combined into a single in-line station, eliminating the need for a separate secondary operation. The cutting trigger uses either a photoelectric sensor (for printed/patterned strips) or a rotary encoder (for continuous plain strips), both delivering ±0.5 mm cut-length repeatability. Pneumatic punching tooling is interchangeable between vertical and horizontal hole orientations, and the punch-die set swaps in under 10 minutes for different hole patterns. SIPM/PLC recipe storage recalls the complete parameter set — cut length, punch position, punch count per strip — in seconds.

5. PLC-Based Recipe Management

The Siemens PLC + HMI touchscreen stores and recalls complete production recipes for different strip profiles, including barrel zone temperatures (typically 160–195 °C for rigid PVC), extruder RPM, haul-off speed, cut length, punch configuration, and vacuum level. Operators switch between product SKUs by selecting a stored recipe — the line auto-configures within 3–5 minutes, compared to 20–30 minutes of manual parameter entry on non-PLC systems. Multi-language HMI (English, Spanish, Russian, Arabic, Chinese) supports cross-border operator training.

6. Automatic Pneumatic Stacking

Finished strips exit the cutting station and are deposited into the collection silo via pneumatic cylinder-actuated stacking. The stacking rack is adjustable for different strip lengths and automatically cycles in sync with the cutting trigger. This eliminates manual handling between production cycles, reduces labor cost (one operator can oversee the entire line), and prevents surface scratching that occurs when strips are manually stacked.

Production Process

Step 1 — Dry Blend Feeding: Rigid PVC compound (dry blend powder with stabilizers, lubricants, impact modifiers, and processing aids) is fed into the single-screw extruder hopper. A hopper dryer upstream ensures moisture content is below 0.3% to prevent surface defects on thin-gauge strips.

Step 2 — Plasticizing & Melting: Material travels through the multi-zone heated barrel (typically 4–5 zones, PID-controlled at 160–195 °C). The 38CrMoAlA nitrided screw with L/D 25:1 or 28:1 provides sufficient residence time for complete gelation without thermal degradation of the heat-sensitive rigid PVC melt.

Step 3 — Multi-Strip Extrusion & Calibration: Melt exits through the precision multi-cavity die head into 2–6 parallel strips simultaneously. Strips immediately enter the vacuum calibration tank, where sizing sleeves and negative pressure (≥ -0.08 MPa) lock the cross-sectional dimensions. Water temperature is regulated to ensure uniform cooling rate across all strips.

Step 4 — Servo Haul-Off: The servo-driven haul-off machine pulls strips at a precisely controlled speed, continuously synchronized with extruder RPM via the PLC for consistent tension and dimensional accuracy.

Step 5 — Cut-to-Length & Punching: Strips pass through the combined cutting and punching station. The photoelectric sensor (or rotary encoder) triggers the cut cycle; pneumatic punches create mounting holes in the same cycle. A single pass completes both length cutting and hole punching.

Step 6 — Automatic Stacking & Collection: The pneumatic stacking rack deposits finished strips into the adjustable collection silo, organized and ready for packaging. Operators transfer filled silo batches to packing stations, with the line continuing production uninterrupted.

Frequently Asked Questions

Q1: What is the typical line speed and daily output for PVC price tag strips?

Line speed depends on strip profile and wall thickness. For a standard rigid PVC price tag strip of approximately 30 mm width × 1.2 mm thickness, the SJ-55 model achieves 6–10 m/min, translating to roughly 40–65 kg/h throughput. Assuming continuous 8-hour shift operation at 50 kg/h average, daily output reaches approximately 400 kg — equivalent to around 80,000–100,000 linear meters of finished strips, depending on individual strip length (commonly 1.0–1.2 m per piece). The SJ-65, running 2–6 strips simultaneously at 12–15 m/min, can push daily output above 600 kg (120,000+ linear meters). Actual figures vary with strip geometry: thinner profiles (0.8 mm) run faster; wider strips (80–100 mm) reduce the number of simultaneous cavities on the die head, lowering total linear output but maintaining comparable mass throughput.

Q2: How does the servo haul-off + encoder cutting system achieve ±0.5 mm cut-length accuracy?

The system relies on a closed-loop architecture with two complementary trigger modes. In encoder mode, a rotary encoder mounted on the haul-off drive shaft emits high-resolution pulses (typically 1,000–2,500 PPR — pulses per revolution) proportional to belt travel distance. The PLC converts these pulses to linear displacement using a calibrated wheel-circumference constant. When accumulated distance equals the preset cut length, the PLC fires the cutting blade. Resolution at 2,500 PPR with a standard 100 mm pitch-diameter drive roller yields approximately 0.125 mm per pulse, well within the ±0.5 mm specification. In photoelectric mode (for strips with pre-printed registration marks), a fiber-optic sensor detects the mark edge and triggers the cut directly. Servo haul-off speed synchronization with extruder RPM eliminates the dominant source of length error — belt slip due to tension fluctuation — which can introduce ±2–3 mm variation on open-loop VFD systems. The PLC also applies an acceleration/deceleration compensation algorithm to maintain accuracy during line-speed ramping.

Q3: Can this line switch between different strip widths and profiles — and what is the typical changeover time?

Yes — the line supports rapid product changeover through three coordinated adjustments. First, the die head: lip gaps are individually adjustable, and for dramatic width changes (e.g., 30 mm to 80 mm), the entire multi-cavity die plate or individual cavity inserts are swapped — typically 30–45 minutes with pre-heated tooling. Second, the calibration tank: precision sizing sleeves corresponding to the new profile cross-section replace the existing set, taking approximately 15–20 minutes. Third, the PLC recipe: stored parameters (barrel temperatures, extruder RPM, haul-off speed range, cut length, punch configuration) are recalled in seconds. The punch tooling — if the hole pattern changes — swaps in under 10 minutes via quick-release mounting. Total changeover including die pre-heating is typically 60–90 minutes for a complete profile change. For same-profile width changes only (e.g., thickness adjustment), changeover is under 15 minutes. Operations running multiple SKUs benefit from maintaining dedicated sizing-sleeve sets and punch tooling for each profile family to minimize downtime.

Q4: What PVC compound formulation is recommended for price tag strip production?

Rigid PVC price tag strips require a balanced dry blend formulation optimized for thin-gauge extrusion (typically 0.8–3.0 mm) with good dimensional stability and surface finish. A representative formulation (parts per hundred resin — PHR) includes: PVC resin (K-value 57–60, 100 PHR), organotin or Ca-Zn thermal stabilizer (1.5–2.5 PHR) to protect against degradation at 160–195 °C processing temperatures, acrylic impact modifier (2–4 PHR) for edge toughness and crack resistance during punching, acrylic processing aid (1–2 PHR) to promote uniform fusion and melt strength, internal lubricant (calcium stearate, 0.5–1.0 PHR) and external lubricant (PE wax, 0.2–0.5 PHR) for controlled metal-release and surface gloss, and TiO₂ pigment (0.5–2.0 PHR) for opacity and UV resistance in retail environments. For price tag strips that will receive subsequent screen printing or hot-stamping, a slightly higher processing aid loading (1.5–2.5 PHR) improves surface smoothness. For outdoor or cold-environment applications, impact modifier loading can be increased to 4–6 PHR to meet low-temperature impact requirements. A plastic heating mixer is essential for homogeneous dispersion of additives in the dry blend prior to extrusion.

Q5: What are the vacuum calibration parameters needed for thin PVC strips (typically 0.8–3.0 mm thick)?

Thin-gauge PVC strips are particularly sensitive to calibration conditions because the small cross-section solidifies rapidly and has limited dimensional self-correction. Key parameters: Vacuum level should be maintained at -0.06 to -0.08 MPa — insufficient vacuum (< -0.04 MPa) fails to pull the strip against sizing sleeve walls, causing width variation and surface ripples; excessive vacuum (> -0.09 MPa) increases drag and can cause stick-slip marks or even strip breakage at high line speeds. Water temperature is maintained at 15–25 °C using a chiller-equipped circulation system — colder water accelerates skin solidification, which is beneficial for dimension lock but can induce residual stress and warping if the core remains molten; warmer water (> 30 °C) risks incomplete solidification before the haul-off, leading to belt-mark impressions. Sizing sleeve design for thin strips requires tighter clearance: typically 0.05–0.10 mm oversize relative to target strip dimensions (vs. 0.15–0.30 mm for thicker profiles), with polished internal surfaces (Ra ≤ 0.2 µm) to minimize drag. Immersion length of 1.5–2.5 meters is standard for line speeds up to 12 m/min; higher speeds may require extended tanks. Operators should verify that all strips in a multi-cavity setup receive uniform water flow across the tank width to prevent differential cooling rates.

Why Choose Chenxing

Application-Specific Engineering. Unlike generic profile extrusion lines adapted for price tag strips, Chenxing configures each system specifically for thin-gauge multi-strip production — from die-head cavity geometry to calibration sleeve tolerances to punch-tooling stroke and timing. Every line is factory-tested with customer-supplied PVC compound samples before shipment.

Integrated Ecosystem. Chenxing manufactures the full upstream and downstream equipment chain — from plastic heating mixers for dry blending and hopper dryers for moisture control, through to pelletizing lines for in-house compounding, chillers for process cooling, and pipe coilers for complementary product lines. A single-source supplier simplifies commissioning, service, and spare parts management. Browse our complete product catalog and auxiliary machines for full scope.

Siemens PLC Standard. All control cabinets feature Siemens PLC + HMI touchscreen with multi-language support as standard, not as an optional upgrade. Recipe storage, line-speed synchronization, and alarm diagnostics are built into the baseline configuration.

Proven PVC Extrusion Platform. The SJ single-screw series has been deployed across hundreds of PVC profile and strip production facilities. For operations requiring higher output or different material processing, explore our high-output single-screw extruder and complementary PVC pipe extrusion lines, roof tile extrusion lines, and embossing machines.

Global Support. Chenxing Machinery, based in Zhangjiagang City, Jiangsu Province, provides remote commissioning guidance, on-site technician dispatch, and lifetime technical support. Learn more about us and keep up with the latest news and case studies. For recycling-integrated operations, explore our shredder-extruder recycling solutions.

Start Your Inquiry in 4 Steps

Step 1 — Tell Us Your Strip Profile: Specify strip width, thickness, length, and hole-pattern requirements (vertical or horizontal mounting holes, hole diameter and pitch, number of holes per strip).

Step 2 — Define Your Output Target: Desired throughput (kg/h or linear meters/day) and preferred model range (SJ-45 through SJ-65).

Step 3 — Receive a Custom Proposal: Our engineering team reviews your requirements and provides a tailored configuration — die-head cavity layout, screw design, calibration sleeve dimensions, and punch tooling specifications — typically within 24 hours.

Step 4 — Validate with a Sample Run: Optionally send 50–100 kg of your PVC compound for a trial run at our Zhangjiagang factory. We produce sample strips, record dimensional data, throughput, and energy consumption for your evaluation before commitment.

Contact Nicole directly:

• Phone WeChat WhatsApp: +8615951187228

• Email: ceo@cxsljx.com

Or visit our contact page for the full inquiry form. We respond to all inquiries within one business day.