Roll Refurbishment & Retrofit

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Website: http://yhroll-en.com/2-roll-refurbishment-retrofit.html

We repair, refurbish and retrofit all rolls used in corrugator machines and printing presses for your corrugated board prodution and printing needs

Our repair and refurbishment services for corrugating rolls are tailored to restore both performance and precision, whether the rolls are tungsten carbide coated or chrome plated. Each project follows a detailed, multi-stage process to ensure durability, dimensional accuracy, and extended roll life.

Disassembly of Components
Complete removal of related parts such as bearing housings, sleeves, and oil seals for full access and inspection.
Comprehensive Technical Assessment
We measure hardness, wear levels, flute height and pitch, diameter tolerances, and surface condition using calibrated instruments.
Digital Inspection Report & Repair Plan
A detailed report is provided, along with a tailored restoration plan based on the roll’s current condition.
Specialized Repair Procedures
Tungsten Carbide Rolls: Carbide layer removal → precision grinding → sandblasting → thermal spraying → polishing
Chrome-Plated Rolls: Precision weld repair → precision grinding → hard chrome electroplating → surface thickness control
Three-Stage Quality Control
Inspections are performed after during and after grinding, after coating, and before final delivery. In addition, test runs with paper simulate actual production conditions to verify performance.

Pressure Roll Repair & Refurbishing Services

Our pressure roll repair and refurbishing process focuses on restoring mechanical balance and surface accuracy to ensure stable performance under high-speed conditions. We achieve this through two main steps:

Dynamic balancing to eliminate vibration and ensure smooth, stable operation
Precision cylindrical grinding to restore surface finish and maintain dimensional accuracy

Glue Roll Repair & Refurbishing Services

To restore glue rolls to optimal working conditions, we remove worn or damaged engraving using precision machining and reapply new patterns through CNC-controlled embossing. This process ensures uniform cell structure and accurate glue application during production.
Once re-engraved, the roll surface undergoes a hard chrome plating treatment, which reinforces durability and protects against wear, corrosion, and adhesive buildup.

Doctor Roll Repair & Refurbishing Services

We provide precision refurbishment services for doctor rolls used in corrugated board production. The roll surface is carefully reground using high-precision cylindrical grinding to restore roundness and surface quality.
To enhance durability and resistance to adhesive and solvent exposure, the roll is then treated with a hard chrome coating, extending its service life and maintaining smooth, consistent glue regulation during operation.

Corrugator Cassette Repair & Refurbishing Services

Our refurbishing services for corrugator cassettes are designed to restore the performance and structural alignment of corrugator cassettes used in single facer modules. We carry out: -Hydraulic cylinder assembly replacement for stable pressure control
-Precision calibration of positioning rails to correct misalignments
-Dynamic leveling compensation to maintain balance during high-speed operation
Our repair process is fully traceable, with detailed records kept at every stage. We also offer optional before-and-after analysis reports. Each project is backed by a 12-month quality guarantee to ensure long-term reliability and peace of mind.
Working with Yonghui means gaining measurable value: cassette refurbishment typically costs only 50–60% of a new unit, while lead times are reduced by up to 50% compared to industry averages. With more than 1,000 verified cases in our process database, we deliver proven results backed by over 20 years of experience in industrial roll and cassette services.
Let our team help extend the service life of your equipment with efficient, data-driven repair solutions tailored to your production needs.

How can I get a quick overview of the corrugating roll repair process?

We offer a complete, step-by-step repair service for corrugating rolls, tailored to your specific requirements. In many cases, worn rolls can be refurbished through precision regrinding. Our process includes full disassembly of related components (such as bearing housings and seals), detailed inspection of hardness, flute height, wear levels, and diameter tolerances, followed by a digital inspection report and customized repair plan. For tungsten carbide rolls, we also provide full surface treatment, including carbide removal, spraying, and polishing.

What are the common signs of corrugating roll failure?

Warning signs include inconsistent flute profiles, excessive noise during operation, visible damage or uneven wear on the roll surface, and a noticeable decline in the quality of corrugated board output.

What is the recommended method for cleaning corrugating rolls and other machine parts?

During production, adhesive and paper fibers can accumulate on roll surfaces. To prevent hardened glue from damaging the coating, rolls should be cleaned promptly after shutdown. Avoid washing the rolls while they’re still hot. Once cooled, use water or compressed air to clean the surface thoroughly. After cleaning, apply a thin layer of silicone oil to preserve and protect the roll surface.