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Product Description
Window sills and window boards are sold on three promises: a clean surface, a stable cross-section and a profile that will not sag, shrink or yellow in the window frame for years. Many producers discover that turning PVC powder into that kind of profile is harder than it looks — five challenges decide whether a window sill line is a profit center or a problem.
Window sill production needs more than an extruder. The line must also dry and dose the powder, mix the formulation, pull the profile without stretching it and cut it square — and most producers also want to run window profiles, corner profiles and other UPVC sections on the same platform.
Response: the PVC window sill production line is delivered as a complete system — conical twin screw extruder, vacuum calibration tank, haul-off machine, automatic cutter and stacker — with an appropriate die mould and auxiliary machines such as powder charger, mixer and crusher. Change the die and the same platform converts PVC powder into the window board, sill or window profile you need today.
A window board has a wide face and thin ribs — the geometry that most wants to warp during cooling. If the calibrator and vacuum tank do not lock the shape quickly, every batch is a fight with rejects.
Response: the line pairs a stainless steel vacuum calibration tank of 6 m with a die mould whose calibrator and cooling tank are delivered as a complete set. The profile is cooled and sized under vacuum immediately after the die, so the finished board keeps straight edges and consistent dimensions from the first meter to the thousandth.
A haul-off that pulls too hard thins the wall; one that slips leaves ripples on the surface. Either way, the window board fails at installation.
Response: the haul-off machine runs upper and lower belts driven separately with inverter speed control, and Chenxing customizes the traction speed, number of claws and effective traction length according to the profile size and thickness — matching the profile extrusion speed and forming speed and avoiding deformation during traction.
Window sills are cut to exact window widths. A saw that burns the edge or throws PVC dust across the surface forces a second cleaning operation.
Response: the auto-cutting machine is a lifting saw cutter with a double-station dust collection system, controlled by Siemens PLC with chamfering function and working with the haul-off unit for precise cutting. Operators set the required length and the machine delivers square, chamfered cuts without dust drifting onto the finished profile.
UPVC formulations differ from region to region — more filler, less stabilizer, different impact modifiers. A supplier who sells only a standard screw cannot help when the profile starts to show poor plasticizing.
Response: Chenxing designs the screw for the formula. According to different formulations, we provide different screw designs to ensure good plasticizing effect and high capacity, on both conical twin screw and parallel twin screw configurations. That is the difference between buying a machine and buying a working profile extrusion solution.
The PVC Window Sill Production Line — UPVC Window Board Making Machine is a complete conical twin screw extrusion system for converting PVC powder into window sills, window boards and related UPVC profiles. With advanced design, it has the characters of high quality, low energy consumption, low noise and stable working.
Raw material + PVC powder + additive → mixing → conical twin-screw extruder → profile extrusion mould → cool molding die → vacuum calibration tank → haul-off machine → cutter → stacker
The finished profiles have the features of good surface, stronger compression resistance, light and heat stability, low size-changing and ageing resistance — the combination that window manufacturers and construction contractors actually test before they reorder.
This line is supplied as a matched package. Each station is selected to work with the others, so there is no guessing about who is responsible for feeding, mixing, crushing or calibration:
| No. | Name | Specification | Quantity |
|---|---|---|---|
| 1 | Powder Feeder | ZJF 300 | 1 set |
| 2 | Conical twin-screw extruder | SJS65/132 | 1 set |
| 3 | Stainless steel vacuum calibration tank | 6 m | 1 set |
| 4 | Haul-off machine | 3 kW | 1 set |
| 5 | Auto-cutting machine | 2.2 kW | 1 set |
| 6 | Stacker | 6 m | 1 set |
| 7 | Screw loader of mixer | ZD-1 | 1 set |
| 8 | High speed PVC mixer | SRL-Z200/500 | 1 set |
| 9 | Crusher | SWP400, 15 kW | 1 set |
| 10 | PVC pulverizer | SMF500, 45 kW | 1 set |
The extruder is the heart of the line and is built for 24-hour UPVC production:
Siemens motor, ABB inverter
Quality screw and barrel
Air-cooled ceramic heater
High quality gearbox and distribution box
Better cooling of the gearbox
Advanced vacuum system
Both conical twin screw extruders and parallel twin screw extruders can be applied to produce PVC profiles. With the latest technology, the machine lowers power consumption while ensuring capacity; and according to the formulation, Chenxing provides different screw designs for good plasticizing and high output. For more on the extruder family, see the single screw extruder selection guide and the wider profile extrusion line range.
3Cr17 material
Complete set includes extrusion die head, calibrator and cooling tank
Adapts to single, co-extrusion and foam imitation marble profiles
Die head is modular design, easy for changing profile sizes, assembling, dismantling and maintenance
A modular 3Cr17 die set means one line can switch between window sill, window board and other UPVC sections quickly — and when you add a co-extruder later for a cap layer or a decorative foam imitation marble face, the same die platform supports it.
The calibration tank includes a full set of vacuum and water pumps, a width of 240 mm, a length of 6000 mm and an independent operation panel for easy operation. Inside the auxiliary machine range this is the station that decides whether the profile leaves the line straight and stable.
The haul-off provides sufficient traction force to pull the profile stably, with upper/lower belts driven separately and inverter speed control, fast-change type pads for easy operation and an aluminum installation plate.
The cutter is a lifting saw with double-station dust collection, controlled by Siemens PLC with chamfering function. Synchronous driving by air cylinder or servo motor gives precise cutting at the length you set, with an aluminum clamping device and advanced hydraulic system behind the blade.
A 6 m stacker takes the cut lengths clear of the cutting station, keeping the finished profiles organized for inspection and packing.
Window sill production starts long before the extruder. This line includes the preparation equipment that turns raw PVC into a stable, ready-to-run feed:
Powder feeder ZJF 300 — steady dosing into the extruder, comparable with the powder suction machine range for automatic charging
High speed PVC mixer SRL-Z200/500 + screw loader ZD-1 — hot-cold blending of PVC resin, filler and additives, the discipline shared by our mixing unit
Crusher SWP400 15 kW — recycles in-house edge trim and rejects; see the related crushing and material suction machines
PVC pulverizer SMF500 45 kW — grinds reclaimed PVC back to powder, matched with the PVC grinding machine range
Closed-loop recycling of production scrap is a standard part of profitable UPVC production; read the plastic recycling line solution for how Chenxing closes that loop.
From powder feeder to stacker, every station is matched and tested as a system — no third-party compatibility surprises on the factory floor.
Different formulations receive different screw geometry for good plasticizing and high capacity, with conical or parallel twin screw configurations available.
The extruder's latest-technology design lowers power consumption while protecting output, and the air-cooled ceramic heater and better gearbox cooling keep thermal control precise.
Good surface, stronger compression resistance, light and heat stability, low size-changing and ageing resistance — the properties window installers rely on.
Quick die changes between sill, board and other sections; supports single, co-extrusion and foam imitation marble profiles.
Every Chenxing line ships with a 12-month warranty and responsive after-sales support, backed by our own factory and engineers.
Window sills — interior and exterior sills for residential and commercial windows
Window boards — UPVC boards under and around window frames
UPVC window and door profiles — with the appropriate die, the same line runs window frame profiles
Decorative PVC profiles — foam imitation marble and co-extruded faces for interior trim
Building profiles — skirting and trim sections produced on the same platform
The same platform family also serves other visible building products — see the PC LED light cover extrusion line, the PVC shelf label strip extrusion line and the PVC UV marble sheet making line for how far one profile line architecture can go.
Zhangjiagang Chenxing Machinery Co., Ltd. is a professional factory for plastic extrusion and recycling equipment, founded in 2002 and located in Zhangjiagang City, Jiangsu Province, China. With 20+ years of experience building plastic machines, ISO9001 certified manufacturing and CE compliant equipment, Chenxing exports to 30+ countries — and you are welcome to visit our factory at any time.
Our product family covers double-screw extruders, single-screw extruders, PVC/PE/HDPE/PPR pipe lines, PVC WPC and window profile lines, PVC and ABS sheet machines, board and sheet extrusion lines, PVC foaming machines, PP/PE pelletizing lines, recycling lines and auxiliary machines such as crushers, mixers and pipe belling machines. Read more about the company on About Us, browse the full catalog on Products or explore all solutions.
Chenxing supplies double-screw extruders, single-screw extruders, PVC/PE/HDPE/PPR pipe lines, PVC WPC and window profile lines, PVC and ABS sheet machines, PVC foaming machines, PP/PE pelletizing machines, and auxiliary machines such as crushers, mixers and pipe belling machines. This window sill line is one part of the complete pipe and profile extrusion portfolio.
We are a machinery factory with our own manufacturing facilities in Zhangjiagang, and you are welcome to visit at any time.
Yes. Our experienced mechanical designers provide customized design. Send your profile drawing, formulation and output target, and we will adjust the screw, die and downstream configuration to suit.
We have an experienced R&D team that ensures the feasibility of the product before production, professional quality inspectors who check raw materials before production, patrol inspection during production, and re-inspection before delivery.
We provide high-quality machines backed by a 12-month warranty, factory-direct pricing and responsive after-sales service. Because we design and build the line ourselves, support comes from the engineers who know the machine.
Yes. Our engineers will guide the machine installation at your factory and train your workers on operation and maintenance.
We accept T/T, L/C, Western Union, etc., according to the project value and your preference. Payment terms are confirmed in the formal quotation.
We provide technical support such as plant planning according to your requirements, including factory layout, auxiliary equipment selection and production line integration. For more answers, visit our FAQ list or contact us directly from the contact page.
Every order starts with the profile drawing and the formulation. Tell Chenxing the window sill or board cross-section you sell, your target output in kg/hr, and whether you plan to add co-extrusion or foam imitation marble later — the engineering team will fix the complete equipment list, from the powder feeder to the stacker, in a written quotation.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 window profile inquiries within 24 hours and can arrange a live video demonstration of the line running your material.
