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Product Description
The PVC Roof Tile Extrusion Line by Chenxing Machinery is a multi-configuration system producing corrugated and trapezoidal roofing sheets in widths from 710 mm to 1,220 mm and thicknesses from 0.8 mm to 3.0 mm. Five extruder configurations span single-layer, double-layer, and three-layer structures — supporting everything from basic single-skin roofing to advanced A+B+C co-extruded tiles with a foamed core, UV-resistant ASA/PMMA cap layer, and solid U-PVC substrate. Output ranges from 400 to 700 kg/hr depending on configuration.
PVC roof tiles have largely replaced galvanized iron and asbestos-cement sheets in residential, agricultural, and light-industrial roofing across Asia, Africa, the Middle East, and South America. They offer four functional advantages over metal roofing: zero corrosion (critical in coastal and high-humidity regions), thermal insulation from the hollow or foamed structure, noise reduction during rainfall, and complete waterproofing through overlapping interlocking profiles. The complete product catalog covers all Chenxing extrusion solutions for the building materials sector.
| Configuration | Extruder Model | Tile Width | Thickness | Capacity | Layer Structure |
|---|
| Config 1 | SJZ80/156 | 710–1,220 mm | 0.8–3.0 mm | 450–550 kg/hr | Single layer |
| Config 2 | SJZ92/188 | 710–1,220 mm | 0.8–3.0 mm | 600–700 kg/hr | Single layer |
| Config 3 | SJZ80/156 + SJ92/188 | 710–1,220 mm | 2.5–3.0 mm | 450–550 kg/hr | Double layer (A+B) |
| Config 4 | SJZ92/188 + SJ50 | 710–1,220 mm | 2.5–3.0 mm | 600–700 kg/hr | Double layer (A+B) |
| Config 5 | SJZ51/105 + SJZ65/125 + SJZ81/105 | 710–1,220 mm | 2.5–3.0 mm | 400–500 kg/hr | Three layer (A+B+C) |
Model selection: Single-layer configurations (Config 1 and 2) are the workhorses for standard U-PVC roofing tiles — simple, cost-effective, and producing tiles at 450–700 kg/hr. Double-layer (Config 3 and 4) adds a second extruder to produce two-material tiles where each layer can have different properties — typically a colored UV-resistant outer layer and a high-strength inner layer. Three-layer (Config 5) is the premium setup with three single screw extruders feeding a single die: the bottom structural layer in U-PVC, the middle layer as a foamed core for thermal insulation and weight reduction, and the top cap layer in ASA or PMMA for 10–15 year outdoor color retention. All five configurations use the same downstream equipment — calibrating table, haul-off, cutting, and stacking — sized to the widest tile profile the customer plans to produce.
| Layer Code | Structure | Materials | Tile Type | Key Advantage |
|---|
| Single | One homogeneous layer | U-PVC | Standard tile | Lowest cost, simplest production |
| A+B | Two-layer bonded | U-PVC (both layers) | Premium tile | Color outer + strength inner |
| A+B (+A/C) | Two-layer with cap | U-PVC + cap layer | UV-resistant tile | Enhanced weatherability |
| A+B+A/C+S | Four-layer co-ex | U-PVC + FOAM + U-PVC + ASA/PMMA | Insulated premium tile | Thermal barrier + 15-year color |
The line produces five standard corrugated and trapezoidal profiles by changing the die and calibrating tooling. Each profile serves a different architectural and functional purpose:
| Profile | Shape | Typical Width | Common Application |
|---|
| Parallel | Flat with parallel ribs | 710–1,050 mm | Wall cladding, interior partitions |
| Big Wave | Wide sinusoidal corrugation | 900–1,220 mm | Residential roofing, high rainfall areas |
| Small Trapezoidal | Fine trapezoidal ribs | 710–900 mm | Agricultural sheds, temporary structures |
| Small Triangular | V-shaped ribs | 710–900 mm | Carports, awnings, light covers |
| Big Triangular | Deep V-shaped corrugation | 900–1,220 mm | Industrial roofing, warehouses |
Profile changeover involves swapping the die (approximately 2 hours) and adjusting the calibrating table rollers to match the new profile geometry (30–45 minutes). Most factories dedicate a single profile to each line and run it continuously, rather than switching profiles on the same line. Our PVC pipe extrusion line page illustrates similar downstream calibration technology adapted for continuous-profile products.
| No. | Component | Single Layer | Double Layer | Three Layer | Function |
|---|
| 1 | Conical Twin-Screw Extruder (Main) | ● | ● | ● | Melts U-PVC base material |
| 2 | Co-Extruder 1 | — | ● | ● | Feeds second layer material |
| 3 | Co-Extruder 2 | — | — | ● | Feeds cap layer (ASA/PMMA) |
| 4 | Distributor / Feedblock | — | ● | ● | Merges multiple melt streams |
| 5 | Profile Die | ● | ● | ● | Shapes melt into corrugated profile |
| 6 | Vacuum Calibrating Table | ● | ● | ● | Sets tile profile geometry |
| 7 | Haul-Off Machine | ● | ● | ● | Pulls tile at controlled speed |
| 8 | Cutting Machine | ● | ● | ● | Cuts tile to programmed length |
| 9 | Stacking Rack | ● | ● | ● | Collects finished tiles |
The five configurations are not five separate machines — they share the same downstream equipment architecture while scaling the extruder front-end. A factory starting with Config 1 (SJZ80/156 single-layer) can later upgrade to Config 3 (adding the SJ92/188 co-extruder and distributor) by installing the second extruder alongside the existing line and replacing the die with a multi-layer version. This protects the initial investment while allowing the product range to grow from basic single-skin tiles to premium multi-layer roofing as market demand matures. For raw material preparation, a high speed mixer ensures consistent blending of PVC resin with stabilizers, impact modifiers, and pigments. A hopper dryer is recommended for operations in humid climates where moisture in PVC resin causes surface defects on the finished tile.
Configurations 1 and 2 use a single conical twin-screw extruder to produce U-PVC tiles at 450–700 kg/hr. At 550 kg/hr, a 1.0 mm thick tile weighing approximately 1.5 kg per linear meter can be produced at roughly 6 meters per minute — equivalent to 3,600 linear meters or 1,500 standard 2.4-meter tiles per hour. This is the configuration for manufacturers supplying the commodity roofing market where price per square meter is the primary purchasing criterion. A vacuum loader automates pellet feeding, while a vacuum conveyor can be added for multi-hopper operations in larger factories.
Configurations 3 and 4 pair a main extruder (SJZ80/156 or SJZ92/188) with a co-extruder (SJ92/188 or SJ50) and a distributor that merges the two melt streams into a single die. The two layers bond at the molecular level inside the die — no adhesive, no lamination step. The typical arrangement: the bottom layer (60–70% of total thickness) uses a standard U-PVC formulation optimized for strength and impact resistance, while the top layer (30–40% of thickness) uses a UV-stabilized formulation with higher pigment loading and TiO₂ content for color fastness. This delivers a tile that looks better and lasts longer than single-layer while adding only 15–20% to raw material cost — the premium surface layer is thin, so the cost impact is modest. Off-spec tiles and edge trim are recycled through our plastic pelletizing system to recover material value.
Configuration 5 uses three extruders — SJZ51/105, SJZ65/125, and SJZ81/105 — feeding a single die to produce the most advanced tile structure in the lineup:
Bottom layer (A): Solid U-PVC, the structural backbone of the tile. Formulated for impact resistance and screw-holding strength so the tile survives installation and wind uplift.
Middle layer (B): Foamed PVC core. The chemical foaming agent creates closed cells that reduce the tile's weight by 20–25% and provide a thermal barrier — the foamed core cuts heat transmission through the roof by approximately 40–50% compared to a solid tile of the same thickness, a meaningful difference in tropical climates where roof heat gain is the primary driver of indoor cooling costs.
Top cap layer (C/S): ASA (acrylonitrile-styrene-acrylate) or PMMA (polymethyl methacrylate). This layer is only 0.1–0.2 mm thick but delivers exceptional UV resistance — ASA retains over 80% of its original color after 10 years of equatorial outdoor exposure, compared to standard U-PVC that yellows and chalks within 2–3 years. The result is a roofing tile that looks new for a decade, insulates the building, and weighs less than a solid tile — commanding a significant price premium in the market.
For foam core processing, an industrial chiller maintains precise calibration water temperature to prevent foam cell collapse. Production scrap is recovered through our plastic recycling pelletizing line, and tile surfaces can be enhanced with our plastic embossing machine for decorative textures.
A key operational advantage of this line is the speed at which tile profiles can be changed. The die is mounted on a quick-clamp system that allows a complete die swap in under two hours — compared to four or more hours on older bolt-on die designs. The vacuum calibrating table uses adjustable roller sets that can be repositioned to match the new profile geometry without replacing the entire calibration unit. This supports mixed-product production: a factory can run big-wave residential tiles in the morning, switch to small-trapezoidal agricultural sheets in the afternoon, and run triangular industrial tiles overnight — all on the same line. The products page lists all downstream components available for tile production.
Dry Blend Preparation — PVC resin (K-value 65–67), calcium carbonate filler (5–15 parts), impact modifier (CPE or acrylic, 6–10 parts), Ca/Zn stabilizer (3–5 parts), TiO₂ pigment (2–4 parts for colored tiles, 5–8 parts for white), and processing aids are mixed in a high-speed mixer at 110–120°C and cooled to 40°C. For ASA cap-layer material in three-layer configurations, pre-compounded ASA pellets are fed directly into the cap-layer extruder's hopper without dry-blending.
Extrusion — The dry blend enters the main conical twin-screw extruder and plasticizes across four barrel zones (160°C → 170°C → 178°C → 185°C). For multi-layer configurations, co-extruders feed their respective materials into the distributor, which arranges the melt streams into the programmed layer order before entering the die.
Die Forming — The merged melt exits the profile die as a continuous corrugated or trapezoidal sheet. The die's internal flow channels are machined to deliver uniform melt distribution across the full tile width, preventing thickness variation between the crown and valley of each corrugation.
Calibration & Cooling — The hot tile enters the vacuum calibrating table, where precisely machined calibration sleeves apply vacuum and cooling water to lock the profile geometry while the PVC solidifies. Consistent chiller water temperature is critical during this stage.
Haul-Off & Cutting — A caterpillar haul-off grips the cooled tile edges and pulls at a speed synchronized with the extruder output. A flying saw cuts the tile to the programmed sheet length — typically 2.4 m, 3.0 m, or up to 6.0 m for custom orders.
Stacking — Cut tiles are automatically stacked in counted bundles. For export production, an optional interleaf paper or PE film applicator can be added to prevent surface scuffing between stacked tiles during container shipping. Our auxiliary equipment range covers all post-extrusion handling needs.
Five standard profiles: parallel, big wave, small trapezoidal, small triangular, and big triangular — covering flat cladding to deep industrial corrugation. A die swap takes under 2 hours with the quick-clamp system. Calibrating table roller adjustment takes another 30–45 minutes. Most factories dedicate one profile per line for continuous production; mixed-profile factories typically run 2–3 profiles on rotation across weekly campaigns.
Single-layer is the cost leader: one extruder, U-PVC only, 0.8–3.0 mm thick, ideal for commodity roofing and agricultural sheds. Double-layer adds a co-extruder to produce a two-material tile — typically a UV-stabilized colored outer face bonded to a high-strength inner substrate. Three-layer adds a foamed core between structural and cap layers, delivering thermal insulation (40–50% heat reduction versus solid tile) and 10+ year outdoor color retention with ASA/PMMA. Choose based on your target price point: single-layer for volume, double-layer for brand differentiation, three-layer for premium architectural roofing.
ASA and PMMA are inherently UV-stable — unlike PVC, which degrades through dehydrochlorination when exposed to UV radiation. A 0.1–0.2 mm ASA cap layer retains over 80% of original color after 10 years of equatorial sun exposure (tested per ASTM G154, 5,000-hour QUV accelerated weathering). Standard U-PVC without a cap layer shows visible yellowing and surface chalking within 2–3 years. The cap layer also improves chemical resistance against acid rain and bird droppings.
At 550 kg/hr (Config 1), a 1.0 mm × 1,050 mm tile weighing ~1.5 kg/m runs at ~6 m/min — approximately 1,500 standard 2.4 m tiles per hour or 12,000 per 8-hour shift. Actual output varies with tile thickness (0.8 mm tiles run faster, 3.0 mm slower) and profile (deep corrugations slow the line because the extra surface area requires longer calibration contact time). The bottleneck is typically the cooling/calibration stage, not the extruder. Our High-Output Single Screw Extruder page explains the motor and drive sizing used across our product lines.
Core materials: PVC resin (K65–67 suspension grade), CaCO₃ filler, CPE or acrylic impact modifier, Ca/Zn stabilizer, TiO₂, and processing aids — all commodity chemicals with multiple international suppliers. For three-layer: ASA or PMMA pre-compounded pellets for the cap layer, and chemical foaming agent (azodicarbonamide) for the foam core. We provide a complete bill of materials with recommended international suppliers as part of the commissioning package. PVC resin from Formosa, Shin-Etsu, or LG Chem; ASA from SABIC or LG Chem; stabilizers from Baerlocher or Reagens — all globally available grades.
Scalable investment — start with Config 1 single-layer at 450–550 kg/hr. Add a co-extruder and distributor later to upgrade to double-layer without replacing the entire line. The downstream equipment (calibrating table, haul-off, cutter, stacker) is shared across all configurations.
Five profiles, one line — produce five standard tile profiles from the same production line by changing dies. No need for five separate machines to serve five market segments.
Weather-tested formulations — our material recommendations are validated for outdoor roofing performance, not theoretical lab conditions. ASA cap-layer formulations are proven to 10+ years of color retention in equatorial markets from Southeast Asia to West Africa.
End-to-end factory support — from raw material formulation and supplier sourcing to CAD factory layout, remote (or on-site) commissioning, and operator training. You produce the first specification-grade tiles within 5–7 days of uncrating.
Ready to supply the fast-growing PVC roofing market — whether with basic single-layer tiles, premium multi-layer roofing, or high-end ASA-capped insulated sheets?
Step 1 — Define Your Tile Program: Email ceo@cxsljx.com with your target tile profile(s), width(s), thickness(es), layer structure (single/double/three-layer), monthly output target, and local climate conditions. If you have a competitor's tile sample you want to match, include photos and dimensions. Response within 24 hours.
Step 2 — Receive Your Configured Proposal: Within 3 working days, receive a complete proposal: recommended extruder configuration, throughput projection per tile specification, die and calibration tooling design for your profiles, ASC/PMMA material sourcing if applicable, dimensioned CAD factory layout, and itemized quotation.
Step 3 — Validate with Tile Samples: Before shipment, we run sample production of your target tile profile at our factory. You receive finished tile samples for your own testing (impact, color, dimensional accuracy, water tightness of interlocking joints), plus a video and process data log of the production run.
Step 4 — Commission to Commercial Production: Our engineers guide installation, recipe setup, and operator training via live video (or on-site for larger projects). The line is handed over after your tiles meet dimensional, color, and output specifications at the contracted production rate.
Contact us now: ceo@cxsljx.com | +86 159 5118 7228 | Chenxing Machinery
Learn more about our company history and global customer base on our about us page. For production insights and material innovations, visit our industry news section. Ready to discuss your project? Contact us directly.
