PC Light Tube Production Line

The SUHUI PC light tube production line is specially designed for extruding polycarbonate (PC) tubes, PC profiles, and transparent LED lamp diffuser covers, including single-color and dual-color LED lampshades. It is also fully compatible with PMMA (acrylic) materials, making it suitable for a wide range of high-transparency lighting and optical profile applications.

The system features a specialized screw designed specifically for PC materials, ensuring excellent plasticizing performance and eliminating common PC extrusion defects such as crystallization spots, draw marks, and vibration lines. Finished products achieve high light transmittance and superior optical clarity. The screw is manufactured from imported special alloy steel, preventing material adhesion, black spots, and degradation during continuous high-temperature operation.

A key advantage of this line is its newly developed online precision cutting system, which performs one-pass cutting during extrusion without secondary processing. Cutting accuracy is controlled within ±0.5 mm, delivering smooth, chip-free ends and significantly improving overall production efficiency.

Key Features of SUHUI PC Light Tube Production Line

• PC/PMMA Specialized Screw Design: Purpose-built screw geometry ensures thorough plasticizing of PC and PMMA materials, eliminating crystallization spots, draw marks, and optical defects.
• Online Precision Cutting System: Integrated cutting unit performs single-pass cuts during extrusion with ±0.5 mm accuracy — no secondary cutting required, clean chip-free ends.
• High Optical Clarity Output: Optimized extrusion process delivers tubes and profiles with excellent light transmittance and consistent transparency for LED lighting applications.
• Dual-Color Co-Extrusion Capability: Supports single-color and dual-color LED lampshade production with a co-extrusion die configuration.
• Premium Electrical Components: Siemens, Schneider, and ABB electrical components ensure reliable performance and globally available after-sales support.
• High-Torque Gearbox: Equipped with NSK/SKF precision bearings for stable, low-vibration operation under continuous production loads.
• Original Siemens/WEG Motor: Energy-efficient main drive motor with inverter control for stable screw speed and reduced power consumption.
• Stainless Steel SUS304 Construction: All material-contact surfaces use SUS304 stainless steel for hygiene, corrosion resistance, and long service life.
• Energy-Saving Pump Control: Variable-frequency pump control system reduces hydraulic energy consumption during cooling and calibration.

PC Light Tube Extrusion Process Workflow

1. Material Drying: PC or PMMA pellets are dried in a dehumidifying dryer to reduce moisture content below 0.02%, preventing hydrolytic degradation and optical defects during extrusion.
2. Feeding: Dried material is fed into the extruder hopper via a vacuum loader or gravimetric dosing unit for consistent, controlled material flow.
3. Plasticizing & Extrusion: The PC-specialized screw melts and homogenizes the material under precise multi-zone temperature control, then forces the melt through the tube or profile die head.
4. Calibration: The extruded tube or profile enters a precision vacuum calibration sleeve that fixes the outer diameter and wall thickness to the target dimensions.
5. Cooling: The calibrated profile passes through water cooling tanks for full solidification while maintaining dimensional stability and optical clarity.
6. Haul-Off: Servo-driven caterpillar pullers draw the tube through the line at a precise, adjustable speed to ensure consistent wall thickness and surface quality.
7. Online Precision Cutting: The integrated cutting unit automatically cuts tubes to the specified length (±0.5 mm accuracy) during extrusion, producing smooth, chip-free ends without secondary processing.
8. Collection & Packaging: Finished PC light tubes are inspected for optical clarity and dimensional compliance, then bundled or packed for shipment.

Frequently Asked Questions

What materials can the SUHUI PC light tube production line process?

The SUHUI PC light tube production line is designed primarily for polycarbonate (PC) and PMMA (acrylic) materials. The specialized screw geometry is optimized for the high-temperature processing requirements of PC, ensuring thorough plasticizing without degradation or crystallization defects. The line is compatible with both transparent and colored PC/PMMA compounds and supports dual-color co-extrusion configurations for LED lampshade applications.

Why does PC extrusion require a specialized screw design?

Polycarbonate has a high melt viscosity and is highly sensitive to moisture and temperature variations during extrusion. A standard general-purpose screw cannot provide sufficient shear and mixing to fully plasticize PC uniformly, leading to common defects including crystallization spots, draw marks, and vibration lines that compromise optical clarity. The SUHUI PC-specialized screw uses an optimized compression ratio, barrier flight geometry, and mixing elements that provide controlled shear for uniform melt quality without thermal degradation.

What is the cutting accuracy of the online precision cutting system?

The integrated online precision cutting system achieves a cutting accuracy of ±0.5 mm per cut. The cutter operates during extrusion in a single pass, eliminating the need for secondary cutting operations. This produces smooth, chip-free tube ends that meet dimensional compliance requirements directly from the production line, reducing labor, post-processing time, and material waste from secondary operations.

What tube and profile dimensions can the line produce?

The SUHUI PC light tube production line can be configured to produce PC tubes and LED diffuser covers in standard diameters commonly used for T5 and T8 LED tube applications, as well as custom-diameter profiles and flat diffuser sections for panel lighting. Specific output dimensions including outer diameter, wall thickness, and tube length are determined by the die head, calibration sleeve, and cutting system settings. SUHUI engineers provide die design services for non-standard dimensions upon request.

How is moisture control managed before PC extrusion?

PC is highly hygroscopic and must be dried to below 0.02% moisture content before extrusion to prevent hydrolytic degradation, which causes molecular chain scission, reduced melt viscosity, and surface defects in the finished tube. The production line workflow begins with pre-drying PC pellets in a dehumidifying dryer at 120–130°C for 4–6 hours before feeding. Consistent pre-drying is critical to achieving the high optical clarity and mechanical properties required for LED diffuser applications.

What electrical and mechanical components does the line use?

The SUHUI PC light tube production line uses internationally recognized brands for key components: Siemens, Schneider, or ABB electrical components for reliable global after-sales support; NSK or SKF precision bearings in the high-torque gearbox for stable, low-vibration operation; Siemens or WEG inverter-controlled main drive motors for energy-efficient, precise screw speed control; and SUS304 stainless steel for all material-contact surfaces to ensure hygiene, corrosion resistance, and long service life.