Custom Plasma Sprayed Ceramic-Coated Aluminum Rollers

The AstraRoll Technical Advantage: Lightweight & Bulletproof
Standard anodizing simply cannot survive highly abrasive or high-voltage environments. We engineer our ceramic rollers to conquer the most severe converting challenges:

Sapphire-Like Hardness: Plasma-sprayed ceramics achieve a hardness rating of HV1000 to HV1300+. This extreme durability completely eliminates the deep grooving and scoring caused by high-speed paper, metallic foil, and synthetic film edges over time.

Exceptional Electrical Insulation: High-voltage processes, such as Corona Treatment (used to increase film surface energy for printing), require a roller that acts as a dielectric barrier. Our pristine white Alumina ceramic coatings block electrical conductivity, preventing arcing and ensuring uniform plasma discharge across your web.

Ultra-Low Rotational Inertia: A solid ceramic or steel roller is incredibly heavy, acting as a brake when machine speeds change. By using an aluminum core, our rollers accelerate and decelerate instantly with your web tension, completely eliminating the "skidding" that causes surface scratches.

Flawless Diamond Grinding: Raw plasma-sprayed ceramic has a rough, sandpaper-like texture. AstraRoll utilizes state-of-the-art cylindrical diamond grinders to polish the ceramic layer down to a mirror-like Ra 0.2 finish, ensuring safe handling of even the thinnest battery separator films.

Key Specifications & Custom Capabilities

Please note: We manufacture entirely to your specifications. The following are our standard operating ranges.
Outer Diameter (O.D.): Custom from 50mm up to 400mm+.
Face Length: Custom manufactured up to 3,000mm+.
Coating Thickness: Typically 0.2mm to 0.5mm (Customizable based on voltage/wear requirements).
Surface Hardness: HV1000 to HV1300+ (Vickers Hardness).
Dielectric Strength (Insulation): High breakdown voltage capacity for Corona applications.
TIR (Runout Precision): ≤ 0.02mm after final diamond grinding.
Dynamic Balancing: ISO G2.5 at your specified line speed.

Why Choose AstraRoll? (Your Converting OEM Partner)

1. Advanced Thermal Spray Adhesion

A common failure in cheap ceramic rollers is the coating flaking or chipping off under thermal stress. AstraRoll utilizes advanced plasma spray guns and proprietary metallic bond coats (like NiCrAlY) applied before the ceramic. This ensures a permanent, mechanical interlock between the aluminum substrate and the ceramic shell, capable of withstanding continuous industrial abuse.

2. Complete In-House Manufacturing

Many suppliers buy aluminum tubes and outsource the plasma spraying and diamond grinding to different machine shops, destroying quality control and inflating prices. AstraRoll controls the entire process under one roof—from CNC machining the aluminum core and dynamic balancing, to plasma spraying and final micro-grinding. This guarantees OEM-level precision at direct-from-factory B2B pricing.

Frequently Asked Questions (FAQs)

Q: Is the ceramic coating brittle? Will it crack if the aluminum expands from heat?
A: While solid ceramic is brittle, a plasma-sprayed ceramic coating is formulated with microscopic porosity that allows it to flexibly expand and contract along with the aluminum core during normal thermal cycles. However, the roller should never be subjected to severe mechanical impact (like being dropped or hit with a hammer), as localized impact can chip the coating.

Q: Why do I need a white Alumina coating for my Corona Treater?
A: In a Corona treating system, the roller itself must act as a dielectric insulator to prevent the high-voltage electrical arc from grounding out through the machine frame. White Aluminum Oxide (Alumina) provides the exact dielectric strength and ozone resistance required to maintain a stable, uniform corona plasma field over the web.

Q: Can you recoat my old, worn-out ceramic rollers?
A: Yes, absolutely. Aluminum cores are valuable. You can ship your worn rollers to our factory. We will safely grind off the old ceramic layer, re-apply the plasma-sprayed coating, and diamond-grind it back to the original OEM specifications, saving you the cost of fabricating a new core.

Q: Can this roller handle wet environments?
A: Yes. We completely seal the microscopic pores of the ceramic coating using specialized industrial sealants after the plasma spray process. This prevents moisture, inks, or chemical solvents from penetrating the ceramic layer and oxidizing the underlying aluminum core.

Q1. Are you a trader or direct factory?

We are a direct manufacturing factory with over 20 years of expertise in high-end industrial rollers, casters and material handling solutions. Our facility operates with ISO-certified quality management systems, allowing us to maintain full control over production cycles and quality standards. Throughout two decades of growth, we have established deep, long-term strategic partnerships with several listed companies and global automation leaders, proving our reliability as a high-tier industrial supplier.

Q2. What are your main products?

AstraRoll specializes in the engineering and production of three core product lines: Industrial Rollers, Heavy-Duty Wheels, and Precision Casters. We do not just sell components; we provide integrated movement and transport solutions. Our products are widely utilized across high-demand sectors, including: New Energy, Lithium Battery, Mining, Heavy Industry, Medical Institutional, Agriculture and Logistics.

Q3. What about delivery time?

We deeply understand that project timelines are critical.
Standard Products: Usually dispatched within 7–15 working days if the components are in stock.
Customized/OEM Orders: Depending on the complexity and volume, the lead time typically ranges from 20–35 days. This includes time for technical drawing confirmation, specialized tooling, and rigorous pre-shipment testing.
Shipping Methods: We offer flexible global logistics solutions, including FOB and CIF terms. We ship via Sea Freight (for bulk industrial orders), Air Freight (for urgent project needs), and International Express (DHL/FedEx/TNT) for smaller components or samples.

Q4. How can I get a quote for customized products?

Since a significant portion of our business involves specialized engineering, pricing is tailored to your specific technical requirements. To provide an accurate quote, please provide the following details: Technical Drawings or Sketches, Application Environment, Quantity, Special Requests. Our engineering team typically reviews and responds to custom inquiries with a formal quotation within 24–48 hours.

Q5. What is your payment?

TT / Paypal / Western Union / LC / Credit Card etc. are all available to us.