A polycarbonate profile extrusion line is a single screw production line used to process PC resin into continuous rigid or semi-rigid plastic profiles with a fixed cross-section. For lighting and optical applications, the same line can often be configured for PMMA profiles such as LED covers, diffuser profiles, lampshades and transparent tubes.
Polycarbonate (PC) and PMMA profile extrusion line
Polycarbonate (PC) Profile Extrusion Line for Lighting and Optical Profiles
A single screw PC and PMMA profile extrusion line for LED covers, diffuser profiles, lampshades, transparent tubes and optical plastic profiles.
What Is a Polycarbonate (PC) Profile Extrusion Line?
Configuration inputs
| Configuration input | Why it matters |
|---|---|
| Profile drawing or cross-section | Defines die flow path, calibration tooling, support and cutting method |
| Critical dimensions and tolerance | Determines precision calibration tooling, cooling support and haul-off stability |
| Resin grade and optical formulation | Sets drying, screw, temperature and PC/PMMA changeover references |
| Surface and optical requirement | Decides mirror die polishing, scratch-free handling and film protection |
| End use and finish | Helps confirm transparent, frosted, milky white, diffuser or protective-cover configuration |
Typical scope: drying, single screw extrusion, mirror-polished die, vacuum calibration table, cooling, haul-off, cutting and optional film protection.
Typical products: PC LED cover profiles, PMMA diffuser profiles, lampshade profiles, light-diffusing strips and rigid transparent tubes.
Applications
PC and PMMA Lighting Profiles Produced on This Line
LED Tube Covers
Round or semi-round covers for T5, T8 and drawing-based LED tube lights. PC is often selected when impact resistance is important, while PMMA is used when very high clarity is the priority.
LED Diffuser and Cover Profiles
Flat, arc-shaped or custom diffuser profiles for linear lighting fixtures. The line can be configured for transparent, frosted or milky white output according to the resin and die design.
Lampshade Profiles
Rigid PC or PMMA lampshade profiles for architectural lighting, decorative lighting and protective lighting covers. The tooling is matched to the profile drawing and surface requirement.
Optical and Light-Diffusing Profiles
Drawing-based transparent profiles used where shape accuracy and optical surface quality matter. Vacuum calibration, cooling support and haul-off stability are selected according to the profile geometry.
Rigid Transparent Tubes
Round PC or PMMA tubes for protective housings, lighting enclosures and technical transparent tube applications. The line can be configured for stable diameter, clean cutting and surface protection.
Irregular Drawing-Based Profiles
Semi-circular, D-shaped, stepped, grooved or multi-surface profiles made from customer drawings. Optional co-extrusion can support frosted-clear, dual-color or opaque-base combinations when the design requires it.
PC vs PMMA in Lighting and Optical Profile Extrusion
Polycarbonate and PMMA can often run on a similar single screw profile extrusion line, but the processing window and final product behavior are different.
PC / Polycarbonate
- Buyers choose it for
- Higher impact resistance, stronger protective covers, better toughness for industrial or transport lighting
- Process attention
- Drying, melt stability, overheating control, internal stress and surface clarity
PMMA
- Buyers choose it for
- High transparency, good gloss, decorative optical appearance
- Process attention
- Pre-drying, temperature control, surface scratches, brittle cutting behavior and clean die flow
For PC profile extrusion, drying is critical because moisture can cause bubbles, splay marks and loss of clarity. PMMA may also require pre-drying, while stable temperature control and careful downstream handling help protect gloss and reduce cracking or scratches.
PC and PMMA Profile Extrusion Process
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01 Resin Drying and Feeding
PC resin is moisture-sensitive and should be dried according to the resin supplier's technical data sheet before extrusion. A dehumidifying dryer can be included when the resin grade or surface requirement needs tighter moisture control.
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02 Single Screw Melting
The single screw extruder melts and conveys the resin with controlled shear and temperature. For transparent PC and PMMA, stable plasticizing helps reduce yellowing, black spots, bubbles and internal stress.
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03 Mirror-Polished Die Shaping
The melt enters a profile die matched to the product drawing. For optical surfaces, the die flow path and polishing quality directly affect die lines, drag marks, ripples and gloss.
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04 Vacuum Calibration and Cooling
The hot profile enters calibration tooling where vacuum, water and profile support fix the cross-section, then continues through water cooling to lock the shape before traction. Cooling length and support are selected according to profile size, wall thickness, material and line speed. Wider or thinner profiles may need additional support to reduce sagging.
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05 Synchronized Haul-Off
The haul-off pulls the profile at a steady speed matched with extruder output. Stable traction helps hold profile dimensions and reduces surface damage during production.
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06 Cutting and Film Protection
The cutting unit cuts profiles to the required length. For high-gloss PC and PMMA covers, an optional protective film applicator can help reduce scratches during collection, packing and shipping.
Core Components of a PC Profile Extrusion Line
The line is configured around the product drawing, material, output target and quality requirement. A typical PC/PMMA optical profile extrusion line can include the following modules.
Extrusion system
High-Torque Single Screw Main Extruder
| Detail | Reference |
|---|---|
| Function | Melts and conveys PC or PMMA resin into the profile die. |
| Drive system | ABB frequency inverter matched with a 6-pole motor; a typical Jinxin configuration uses a Type 173 hardened-surface gearbox. |
| Control interface | A 15-inch PLC touchscreen (typical configuration) for synchronized adjustment of extrusion and downstream speed. |
| Thermal regulation | Multi-zone heating controlled by solid-state relays (e.g., Taiwan FOTEK SSRs in a typical configuration) for stable transparent-material processing. |
| Plasticization | Nitrided alloy screw and barrel selected for PC and PMMA melt stability. |
Co-extrusion
Mobile Co-Extruder for Special Profiles
| Detail | Reference |
|---|---|
| Function | Supports dual-color, frosted-clear, opaque-base or soft-touch combinations when required by the profile design. |
| Positioning | Mobile structure with height and angle adjustment for flexible die matching. |
| Control | Independent speed and temperature control for repeatable co-extrusion startup. |
Tooling
Mirror-Polished Profile Die
| Detail | Reference |
|---|---|
| Function | Forms the final cross-section according to the buyer's drawing. |
| Surface focus | Mirror polishing helps reduce visible die lines and flow marks on optical profile surfaces. |
| Material option | S-136H die steel or suitable tooling steel can be selected according to surface and durability requirements. |
Calibration
Vacuum Calibration Table
| Detail | Reference |
|---|---|
| Function | Holds the profile shape during initial calibration and cooling. |
| Control points | A typical Jinxin configuration integrates 10-channel vacuum, 10-channel water and 10-channel air-blow manifolds with a stainless steel cooling tank; vacuum is regulated by an ABB-driven pump, with motorized forward/backward movement and manual X/Y/Z adjustment. |
| Use case | Important for transparent covers, diffuser profiles and wider lampshade profiles where shape stability matters. |
Cooling
Cooling Section
| Detail | Reference |
|---|---|
| Function | Stabilizes the profile before haul-off and cutting. |
| Configuration | Cooling length and water circulation are selected according to material, profile size and production speed. |
Haul-off
Flat Belt Haul-Off
| Detail | Reference |
|---|---|
| Function | Pulls the profile at a synchronized speed without damaging transparent surfaces. |
| Control points | A typical configuration uses a dual-motor flat-belt haul-off with ABB frequency inverter and electric belt-pressure adjustment; belt pressure, traction stability and speed matching protect transparent PC and PMMA surfaces. |
Cutting
Automatic Cutting Unit
| Detail | Reference |
|---|---|
| Function | Cuts PC or PMMA profiles to the required length. |
| Reference | Encoder-based measurement with computer-board control for repeatable sizing; cutting tolerance can reach +/- 1 mm under suitable profile and operating conditions. |
| Attention | Blade selection, clamping and cutting speed affect edge quality, especially on rigid transparent profiles. |
Surface protection
Protective Film Applicator
| Detail | Reference |
|---|---|
| Function | Applies PE protective film after cutting or before collection. |
| Use case | Recommended for high-gloss LED covers, transparent profiles and profiles that will be packed or transported after extrusion. |
Key Quality Points for Optical PC and PMMA Lighting Profiles
For transparent or high-gloss profiles, the line is reviewed around surface clarity, dimensional stability, thermal control and scratch-free handling before quotation.
Surface Clarity
Clear or high-gloss profiles are sensitive to die marks, overheating, moisture and downstream scratches. Jinxin reviews die polishing, temperature control, drying and profile handling before quotation.
Dimensional Stability
Vacuum calibration, cooling support and haul-off speed must work together to keep the drawing-defined cross-section stable. Wider profiles may need anti-sagging support during cooling.
Yellowing and Black Spots
Yellowing is usually related to overheating, excessive residence time, poor drying or unsuitable temperature settings. Black spots can form when material remains in dead zones inside the barrel, adaptor or die and carbonizes over time.
Scratch-Free Handling
Transparent PC and PMMA profiles can be rejected if the visible surface is scratched. Guided haul-off, clean support surfaces and optional film application help protect the finished profile.
PC Tube Extrusion Reference Video
This reference video shows transparent PC tube extrusion on a single screw line. It helps buyers understand the extrusion layout, melt stability and downstream handling used for clear PC products.
Transparent PC extrusion referenceSingle screw line layoutClear product downstream handling
Watch Reference Video Custom PC and PMMA profile samples are usually drawing-based and may not be public. Final profile tooling and line configuration depend on your cross-section, resin grade, tolerance and surface requirement.
Why Manufacturers Choose Jinxin for PC and PMMA Profile Production
01
Product-Based Line Configuration and Testing
Jinxin does not quote a generic profile machine without checking the product. The extrusion unit, die, calibration table, cooling, haul-off, cutting and protection modules are selected according to your actual profile drawing and production requirement.
- Product review: Profile drawing, material grade and surface requirement are reviewed before configuration.
- Optical profile focus: Transparent PC and PMMA profiles are checked around clarity, die quality, drying and scratch-free handling.
- Startup references: When a test run is arranged, practical startup references can be recorded after stable running.
02
Itemized Equipment Quotation
The quotation lists the selected equipment modules and major component brands, so buyers can compare the real line scope instead of comparing only headline machine prices.
- Equipment modules: Extruder, die, calibration, cooling, haul-off, cutting and protection modules are listed clearly.
- Component brands: Major drive, control and electrical parts can be reviewed before confirmation.
- Scope clarity: Optional co-extrusion, film protection and service items are separated from the base line.
03
Service-Ready Component Strategy
Core electrical and control components are selected with maintenance and overseas serviceability in mind. Buyers can review the component list before confirming the final configuration.
- Drives and motors: ABB and Siemens Beide are used according to confirmed line configuration.
- Control system: PLC, touchscreen and electrical components are selected for practical operation and maintenance.
- After-sales support: A clearer component list helps future troubleshooting and spare parts planning.
Trust Credentials
Ningbo-based extrusion equipment manufacturer
Jinxin Extruder focuses on configured single screw extrusion lines for pipes, tubes, hoses and profiles.
CE documentation available
Equipment documentation can be prepared for export projects according to the confirmed line scope.
Factory inspection support
Buyers may arrange factory visits, inspection or third-party checking when required.
Repurchase-driven customer base
Many international buyers return to Jinxin when expanding production capacity.
What Our Clients Say
We supply LED lighting covers for China's Fuxing high-speed rail cars. Jinxin's line consistently delivers the optical clarity and dimensional accuracy required to pass railway-grade safety and quality certifications.
The mirror-finish die quality was the deciding factor - consistent surface clarity with minimal die lines across production runs.
Our LED cover profiles ship to distributors across the Middle East, and any surface scratch means a rejected shipment. We asked Jinxin to add an inline film applicator to protect the profiles immediately after cutting.
They integrated the unit into our line - now every piece comes off with PE film applied automatically. No manual handling, no scratches.
FAQ
FAQ About Polycarbonate (PC) Profile Extrusion Lines
01 What is a polycarbonate (PC) profile extrusion line?
A polycarbonate profile extrusion line is a single screw production line used to process PC resin into continuous plastic profiles with a fixed cross-section. It can produce transparent covers, LED diffuser profiles, lampshade profiles, rigid optical tubes and drawing-based technical profiles.
02 Can one line produce both PC and PMMA profiles?
Yes. In many projects, one PC/PMMA profile extrusion line can be configured to run both materials, because PC and PMMA are transparent amorphous resins with similar single screw line requirements. The same line can often produce both PC and PMMA optical profiles after proper purging, temperature adjustment and process verification. The final decision depends on the resin grades, profile shape, tolerance, surface requirement and output target, with operating temperature, drying, purging and cutting behavior adjusted to the material grade.
03 What products can this PC and PMMA profile extrusion line produce?
It can produce PC LED cover profiles, PMMA diffuser profiles, lampshade profiles, flat light-diffusing strips, rigid transparent tubes, protective covers and irregular optical profiles based on customer drawings.
04 What processing conditions do PC and PMMA profile extrusion need?
Typical starting references are often around 260–300 °C for PC and around 200–250 °C for PMMA. PC is moisture-sensitive and should be dried before extrusion to reduce bubbles, splay marks and loss of surface clarity; for many PC grades, pre-drying is commonly done around 100–120 °C for several hours. PMMA may also require pre-drying depending on the grade. Drying conditions should follow the resin supplier's technical data sheet, and the final temperature setting depends on resin grade, screw design, die structure, output target and surface requirement.
05 Why is the die important for optical PC profiles?
For clear or high-gloss PC and PMMA profiles, the die flow path and surface finish directly affect die lines, drag marks, flow marks and gloss. Mirror-polished tooling helps reduce visible surface defects, but final quality also depends on drying, temperature control, screw shear and stable downstream handling.
06 How do you improve dimensional stability during calibration?
Dimensional stability depends on controlled calibration, uniform cooling, suitable profile support and synchronized haul-off speed. For wider LED cover or lampshade profiles, support frames can help reduce sagging in the cooling section.
07 What causes yellowing or black spots in PC or PMMA extrusion?
Yellowing is usually related to overheating, excessive residence time, poor drying or unsuitable temperature settings. Black spots can form when material remains in dead zones inside the barrel, adaptor or die and carbonizes over time.
08 Is this page for finished LED diffuser covers?
This page is for extrusion equipment used to produce PC and PMMA diffuser profiles, LED covers, lampshades and optical profiles. Finished diffuser cover supply uses a different business model and quotation scope.
Quotation inputs
Send Us These Details for Line Configuration
A profile drawing or sample photo helps Jinxin review die tooling, calibration, cooling and downstream handling.
Profile drawing or sample photoPC, PMMA or modified optical resin gradeProfile size, wall thickness and toleranceSurface requirement and finishLine speed or daily production target if availableCutting length and packing requirementCo-extrusion or film protection needFactory voltage, cooling water and layout limit
Custom drawings are used only for configuration review and quotation.
PC profile extrusion line quote
Request a Polycarbonate Profile Extrusion Line Quotation
Send your PC or PMMA profile drawing, material grade, surface requirement and expected line speed, pieces per shift or daily production target if available. Jinxin will review the die tooling, calibration method, cooling length, haul-off, cutting and protection options before preparing an itemized quotation. You can also email sales@jfextruder.com with your drawing, sample photo and project notes.