Imported arc spray gun

Papermaking dryer cylinder spray coating processing

On-site Supersonic Spraying for Papermaking Dryers ★ On-site supersonic spraying of stainless steel alloys onto dryers, followed by precision grinding and polishing. ★ Reinforcement of new dryers with supersonic arc-sprayed nickel-chromium-boron wear-resistant alloys. ★ Spraying on the inner and outer walls of papermaking steam drums, coating rollers, and calendering rollers. ★ On-site brush plating repair and mirror-polishing of dented and corroded dryer cylinders. On-site Spraying for Dryers Spraying for Calendering Rollers New Dryer Reinforcement via Spraying; Coating Roller Repair via Brush Plating VOITH Paper Machine Cylinder Production Line Spraying Construction VOITH Paper Machine Cylinder Production Line Spraying Construction VOITH Paper Machine Cylinder Production Line Spraying Construction High-speed sanitary paper machine new dryer cylinder spraying Typical customer base: Ningbo Zhonghua Paper Co., Ltd., Guangzhou Paper Group Co., Ltd., Guangdong Zhongshun Paper Industry Fuyang Huayu Paper Co., Ltd. Dongguan Liwen Paper Mill, Guangdong Dongguan Jianhui Paper Co., Ltd., Guangdong, Zhuhai Hongta Paper Co., Ltd. Providing complete dryer cylinder spraying equipment and technical consulting services; local repair and brush-plating equipment and technical consulting services for dryer cylinders.

Offer metal powder coating, wear-resistant metal spraying, and wear-resistant metal coatings.

We can restore scrapped and out-of-tolerance mechanical parts, bringing them “back to life.” Additionally, we can pre-protect the surfaces of new workpieces with wear-resistant and corrosion-proof coatings, effectively “extending their lifespan.”

HVOF Supersonic Flame Process: In supersonic flame spraying, oxygen and aviation kerosene are mixed in a premixing system and then burned in a high-pressure combustion chamber. The resulting flame jet, combined with high-pressure air passing through a Laval nozzle, generates a high-temperature, high-velocity flame stream that heats metal-ceramic powders to a semi-molten state.

It is indeed feasible and effective to replace rubber and resin linings with a ceramic coating applied to metal roller bodies via thermal spray coating technology. Industrialized countries such as the United States and Japan have developed ceramic coatings for corona rollers and have achieved successful applications on these rollers.

Pre-strengthened wear-resistant coating for printing press rollers

The anilox roller for flexographic printing machines is coated with a high-density, high-hardness ceramic material applied via thermal spraying, offering a service life that is ten times longer than that of chrome-plated rollers. Key issues such as corrosion and non-slip defects in the paper feed, guide, and impression rollers of printing machines, as well as wear on the fluting surfaces of corrugated board rollers and failures caused by the degradation of corona treatment rollers—where rubber and epoxy bushings are replaced with thermally sprayed ceramic materials—can all be effectively addressed through thermal spraying technology, which has proven to be a highly reliable solution. Surface Pre-强化 for Printing Machine Rollers: Spraying Areas—As Per Drawing Design; Operating Conditions—Friction and Wear / Ink Corrosion; Solution—Various Spraying Methods; Coating Material—Stainless Steel with HRB300 Hardness; Coating Thickness—0.3–1.2 mm; Precision Printing Rollers—After ultrasonic spraying and polishing of 316L stainless steel, the surface achieves a mirror-like finish; Standard Printing Rollers—Arc-sprayed high-chromium alloy; Performance Benefits—Can replace hard chrome plating. Anilox Rollers for Printing Machines: Operating Conditions—Friction and Wear / Printing Ink Corrosion; Solution—Plasma Spraying; Coating Material—Chromium Oxide Powder; Coating Thickness—0.4–0.5 mm; Engraving Wire Sets—600; Materials, Equipment, Processes, and Solutions—We have accumulated extensive experience in coating applications and are now successfully replicating these proven cases. We will **support you throughout the entire coating manufacturing transition process**, ensuring: rapid start-up; a comprehensive and reliable supply solution covering materials, equipment, and processes; coating trials conducted either at your site or in our technical center; and consistently high coating quality and efficiency.

Tungsten carbide coating on the surface of the paper machine rewind roller.

The defects—such as wear, scratches, and scoring—on various rollers used in paper-making machinery are major factors that limit paper quality. For stone rollers that operate at high speeds and frequently, steel rollers can be coated with oxide ceramics or metal-composite ceramic materials via thermal spraying, effectively replacing traditional stone rollers in paper machines without being constrained by frequent, high-speed operation. Similarly, issues like adhesive wear on machine calendering rollers and doctor blades, corrosion of water-conditioning rings, degradation of surface smoothness on glossy calendering rollers, and mechanical wear on nip rollers, sizing rollers, post-drying rollers, and winding drums—all these problems can be addressed through advanced thermal-spraying technologies. At the same time, this approach can extend the service life of paper-machine components by several times. For example, carbide coatings applied to re-winding rollers in paper machines, mirror-finish rollers, and other paper-machine components—including rollers, drying cylinders, and stock chests—operate under conditions of metallic-to-metal wear. Our solution involves supersonic spraying of WC/C0/316L, followed by polishing to achieve a mirror-like finish. The technical specifications are as follows: coating thickness 70–120 μm, surface roughness Ra 3.5–6.5, and coating adhesion strength ≥55 MPa. As for molybdenum rollers used in papermaking, which experience material abrasion and media corrosion, our solution is supersonic spraying of WC/C0/Cr, combined with flame-spraying of metallic molybdenum materials or arc-spraying of corrosion-resistant alloy materials. We have accumulated extensive experience in coating applications and are now successfully replicating these proven cases. We will guide you through the entire coating-manufacturing transition process, ensuring: rapid start-up; a reliable supply solution covering all aspects—from materials and equipment to processes; coating trials conducted either on-site at your facility or at our technical center; and consistently high-quality, efficient coatings.

Currently, in the printing industry, the use of supersonic-spray calendering rolls—featuring a coating that can withstand the high compressive forces exerted by calendering rollers—results in a dense coating that can be polished to a mirror-like finish. This coating exhibits superior wear resistance compared to cold-hardened cast iron and also boasts exceptionally high rolling-contact fatigue strength. Moreover, its corrosion resistance is markedly better than that of electroplated roller surfaces. On carbon steel roller surfaces, a WC coating can be applied, making it particularly well-suited for manufacturing ultra-large calendering rolls. Unlike cold-hardened cast iron, this coating eliminates casting defects altogether. Additionally, this coating can be applied to the surface of dewatering box panels; even at a thickness of just 0.15 mm, its wear resistance far exceeds that of stainless steel by several dozen times. Currently, leading global printing equipment manufacturers have begun officially deploying these rolls, and experimental results have confirmed their significantly enhanced wear and corrosion resistance, effectively extending their service life. Sanxin Thermal Spray offers a wide range of thermal spray equipment, including plasma spray systems, supersonic spray equipment, arc spray systems, zinc spraying machines, flame powder spray equipment, flame wire spray equipment, aluminum spraying machines, sandblasting machines, and various thermal spray processing services—including ceramic coating and tungsten carbide coating applications.

Properties and Application Ranges of Four Common Ceramic Spraying Materials

Characteristics and Application Ranges of Four Common Ceramic Coating Materials: 1. Alumina: This material is white in color and has a melting point of 2050℃. Due to its high hardness, it can be used as an abrasion-resistant coating for mechanical seals, plungers, shaft components, and other similar applications. It also exhibits excellent resistance to corrosion by acids, alkalis, and salts. 2. Aluminum-Titanium Composite Ceramic: As the TiO₂ content increases, the coating color shifts from light gray to bluish-black. Its melting point is approximately 1800℃, and the coating features low porosity with exceptional smoothness after polishing. Moreover, it does not generate static electricity during use. Consequently, aluminum-titanium ceramic coatings are widely employed in industries such as chemical fiber textiles, printing, and dyeing. 3. Chromium Oxide: This material is dark green in color. The coating is dense and achieves excellent smoothness after polishing. It boasts outstanding chemical stability and is insoluble in a variety of solvents, including acids, alkalis, and salts. As a result, this coating is extensively used in environments exposed to various corrosive media. Additionally, it possesses high hardness comparable to tungsten carbide-cobalt, making it suitable for wear-resistant applications. 4. Zirconia: This material is white in color and has a melting point of 2860℃. It is used for protecting high-temperature gas-erosion-resistant parts and for preparing thermal insulation coatings. We have accumulated extensive experience in material, equipment, process, and solution development for coating applications, and we are currently replicating these successful cases. We will guide you through the entire coating manufacturing transformation process, ensuring: rapid production start-up; a reliable supply solution covering materials, equipment, and processes comprehensively; coating trials conducted either on-site at your facility or at our technical center; and consistently high coating quality and efficiency. Start collaborating with us today and reap success tomorrow!

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