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Product Description
PVC cable trunking, skirting profiles and wall corner profiles look like simple extrusions — but they are sold by the meter to electrical contractors and building decorators who reject anything that bows, cracks, burns or looks dull. Five problems decide whether a trunking line pays for itself or sits idle.
Small PVC profiles run fast on paper, but a single-cavity line still pulls one profile at a time. When a distributor orders trunking, skirting and corner bead in the same month, single-cavity thinking means overtime, extra lines and missed deadlines.
Response: this is a double-cavity, twin screw PVC profile line — one extruder, one die train and two forming lanes working from the same melt. Practical output is matched to your section size across five standard YF grades, from 120 kg/hr to 400 kg/hr, so the same platform absorbs peak orders without doubling your floor space.
Trunking sections have thin walls and sharp corners, the geometry that most wants to warp while it cools. If the calibrator is not fed by a stable, pressurized die, every hundred meters produces a pile of seconds.
Response: the line pairs a spiral-flow extrusion die head that holds melt pressure stable at 19-20 MPa with a double-chamber profile cooling platform — a short first chamber delivering very strong cooling right behind the calibrator, so the profile shape is locked in quickly and cleanly. The haul-off then pulls with customized traction speed, claw number and effective traction length to avoid deformation during drawing.
Cable trunking is not decoration — it is electrical protection. In equipment of 1200 V and below, the trunking gives mechanical and electrical protection to the wires inside it. A compound that drips, sustains flame or tracks under load fails the certification a contractor needs.
Response: PVC trunking made on this line has the characteristics of insulation, arc prevention, flame retardancy and self-extinguishing. The screw design and barrel structure are tuned for consistent PVC fusion so flame-retardant additive packages stay evenly dispersed, meter after meter.
The profitable orders in skirting and wall panels carry marble or wood designs on the surface. Producers who cannot print or laminate in-house send profiles out for finishing and lose both margin and delivery control.
Response: the profiles from this line can be treated by printing & glossy oil coating, hot stamping (heat transfer) printing, or lamination — bringing marble and wooden effects onto the surface of PVC trunking, ceiling and wall panel profiles for kitchens, toilets, balconies and living spaces. A complete profile extrusion solution keeps finishing options open.
A trunking line that stops for a week stalls every downstream order. Producers need a supplier who answers the phone, holds spare parts and sends help when remote diagnosis is not enough.
Response: Chenxing provides a 1-year guarantee plus 1 year of free wear-out spare parts. If a machine fault cannot be solved from your description by phone or online tools, our engineers travel to your factory to fix it and train your team on the repair experience. That support policy is written into the offer, not promised verbally.
The Double Cavity PVC Cable Trunking Extrusion Line is a conical twin screw profile line mainly used for making small PVC profiles — PVC skirting profiles, wall corner profiles and PVC cable trunking profiles with different section shapes and heights, as well as rain gutter and shutter window channel profiles on the same platform. The surface of the PVC profile or panel can be treated by printing & glossy oil coating, heat transfer printing, or lamination, which creates a good decoration effect for kitchens, toilets, balconies and other rooms.
PVC cable trunking — internal wiring channels for electrical equipment of 1200 V and below, providing mechanical and electrical protection, neat wiring, reliable installation, and easy line finding, repair and replacement
PVC skirting profiles — decorative and protective baseboard profiles with marble or wood printed finishes
Wall corner profiles — protective corner beads and angle profiles for interior walls
Shutter window channels and rain gutters — larger channel profiles produced by changing tooling on the same extruder platform
The trunking market runs on standard model families — PVC-20, PVC-25, PVC-25F, PVC-30, PVC-40 and PVC-40Q series — in sizes from 20x12 mm up to 40x20 mm. The line is delivered with the dies for the series you sell, and the same screw platform switches to wider skirting and wall panel work (normally 250-300 mm wide) when the order book calls for it. Producers who also plan PVC wall panels or ceiling boards can study the related PVC board and sheet extrusion line technology.
The heart of the line is a conical double screw extruder with the features that keep PVC melt stable:
Siemens touch screen and PLC control
Spiral structure of the barrel
Special design of the screw
Air-cooled ceramic heater
High quality gearbox
Based on a 33:1 L/D screw design, Chenxing has developed a 38:1 L/D ratio. Compared with the 33:1 ratio, the 38:1 ratio achieves 100% plasticization, increases output capacity by 30%, reduces power consumption by up to 30%, and reaches almost linear extrusion performance — the difference shows up directly in your energy bill and your daily tonnage.
For stable automatic feeding, match the extruder with a powder suction machine or a crushing material suction machine so the hopper is always charged while the line runs at full speed.
Moving device of the die head
Die head rotary device
Heat exhausting device
Cooling device for the core
The extrusion die head applies a spiral structure with each material flow channel placed evenly. Every channel is heat treated and mirror polished to ensure the material flows smoothly. The die head structure is compact and provides stable pressure, always from 19 to 20 MPa — at this pressure the profile quality is good with very little effect on output capacity. The same die technology can produce single-layer or multi-layer pipes.
Strong cooling for the calibrator
Better support for the profile (wall panel)
Silencer
Pressure relief valve
The profile cooling platform shapes and cools the profile to reach standard section size. It uses a double-chamber structure: the first chamber is short in length to ensure very strong cooling. Because the calibrator is placed in the front of the first chamber and the profile shape is formed mainly by the calibrator, this design ensures quick and better forming and cooling of the profile.
Pipe clamping device
Water tank filter
Quality spray nozzle
Pipe support adjusting device
Pipe support device
The haul-off unit provides sufficient traction force to pull the profile stably. According to different profile sizes and thickness, Chenxing customizes the traction speed, number of claws and effective traction length to match the profile extrusion speed and forming speed — and to avoid deformation of the profile during traction.
Aluminum clamping device
Advanced hydraulic system
Dust collection system
The cutter is controlled by Siemens PLC with chamfering function, working together with the haul-off unit for precise cutting. The operator simply sets the required length and the saw delivers square, deburred cuts section after section.
| Model | YF120 | YF180 | YF240 | YF300 | YF600 |
|---|---|---|---|---|---|
| Product Max Size | 120x50 mm | 180x50 mm | 240x100 mm | 300x120 mm | 550x120 mm |
| Extruder | SJSZ45/90 | SJSZ51/105 | SJSZ65/132 | SJSZ65/132 | SJSZ80/156 |
| Capacity | 120 kg/hr | 150 kg/hr | 300 kg/hr | 300 kg/hr | 400 kg/hr |
| Production Length | 18 m | 20 m | 24 m | 24 m | 28 m |
| Series | Typical Sizes |
|---|---|
| PVC-20 | 20x12 mm |
| PVC-25 | 25x12.5 mm |
| PVC-25F | 25x25 mm |
| PVC-30 | 30x15 mm |
| PVC-40 | 40x20 mm |
| PVC-40Q | 40x20 mm class, quick-fit cover design |
One conical twin screw extruder feeds two forming lanes, combining PVC powder economy with real throughput for high-volume trunking and skirting orders.
Longer screw geometry delivers 100% plasticization, +30% output capacity and up to -30% power consumption compared with conventional 33:1 designs — measurable savings on every production day.
The extruder and the cutter both run on Siemens PLC with a human-friendly touch interface, so recipes, speeds and cut lengths are set and recalled in seconds.
Evenly placed, heat-treated and mirror-polished flow channels hold melt pressure at 19-20 MPa for a dense, dimensionally stable profile without sacrificing output.
A hydraulic cutter with aluminum clamping, Siemens PLC control and chamfering function makes square, clean cuts at a length you set — no secondary trimming station.
Every line ships with a 1-year guarantee and 1 year of free wear-out spare parts, plus remote diagnostics and on-site engineer support when needed.
Electrical trunking — neat, protected internal wiring for equipment of 1200 V and below; easy to find, repair and exchange lines
Skirting & baseboard — decorative profiles for kitchens, toilets and balconies with marble, wood-grain or glossy finishes
Wall corner protection — angle beads and corner profiles for interior walls
Ceiling & wall panel decoration — heat transfer printed or laminated surfaces on PVC ceiling and wall panel profiles
Rain gutter & shutter channels — larger channel products on the same twin screw platform
Furniture and cabinet trim — small profiles where clean edges and color consistency matter
For producers expanding from trunking into other PVC sections, Chenxing also delivers proven PVC pipe extrusion line solutions built on the same extrusion know-how.
Because trunking and skirting are sold on repeat orders, consistency between batches is the real quality test. The same process discipline shows in every machine we build — from PC LED light cover extrusion lines to PVC shelf label strip lines and PVC UV marble sheet making lines.
Zhangjiagang Chenxing Machinery Co., Ltd. has specialized in plastic extrusion machinery since the early 2000s. With 20+ years of extrusion experience, ISO9001 certified manufacturing, CE compliant equipment and exports to 30+ countries, Chenxing builds profile lines that run predictably on factory floors across Asia, Europe and the Americas.
Our profile machinery is designed around the same profile extrusion line architecture that produces trunking, skirting, corner beads, gutters and wall panels worldwide. When you buy from Chenxing, you work with the manufacturer that designs the screw geometry, the die channels and the downstream tooling — not a trader who assembles unrelated parts. Browse the complete catalog on Products or read our story on About Us, and start browsing from the Chenxing Machinery homepage.
The line covers the standard PVC trunking model families — PVC-20, PVC-25, PVC-25F, PVC-30, PVC-40 and PVC-40Q series — in sizes from 20x12 mm to 40x20 mm. On the wider side, the same platform runs skirting and wall panel profiles normally 250-300 mm wide, and the YF grade table extends the product size range up to 550x120 mm with outputs of 120-400 kg/hr.
Payment terms are 30% down payment as deposit and 70% balance before shipping, on the agreed delivery schedule in the contract.
We accept bank T/T, L/C at sight, or escrow-based trade assurance according to your preference and the project value. Please confirm the preferred method when requesting the formal quotation.
Yes. For every set of machines, Chenxing sends a professional engineer to your factory to help with installation and to test the machines with your team before handover.
Yes. Chenxing holds CE, SGS and ISO certificates for the relevant machines. If you also need other certificates for your local market, we can help you apply.
Every machine carries a 1-year guarantee, and we also offer 1 year of free wear-out spare parts. If a machine breaks or fails within the guarantee period, we first diagnose from your description by phone or online tools; if that does not solve the problem, our engineers travel to your factory to fix it and teach your team the related repair experience.
Standard supply is 380 V, 50 Hz, 3 phase, or any other voltage according to the client's requirement — please state your local supply voltage when ordering. For more answers about installation, spare parts and payment, visit our complete FAQ list.
Every trunking order starts with the numbers that matter: the trunking series (PVC-20 to PVC-40Q), the surface finish you plan to offer (printing, heat transfer or lamination), and your target output in kg/hr. Send the profile drawing to Chenxing and the engineering team will fix the extruder model, die count and downstream configuration in a written layout before production.
For a closer look at the machine in operation and its full configuration, view more machine details.
Nicole — Email: ceo@cxsljx.com | Tel WeChat WhatsApp: +86 159 5118 7228
We reply to trunking inquiries within 24 hours and can arrange a live video demonstration of the line running your profile.
