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Application of Plasma Spraying Technology in Automotive Engine Manufacturing
Release time:
2020-09-01 15:28
Source:
As a crucial component of automobiles, the quality of an engine often plays a decisive role in whether consumers choose to buy a particular vehicle. A high-quality engine—from its individual parts all the way through to the assembled unit—undergoes countless manufacturing processes and comprises tens of thousands of components. The precision of each part and the quality of the materials used directly determine the engine’s future service life. Since engines operate under harsh conditions—including high pressure, high temperatures, and intense friction—it is imperative for engine manufacturers to do everything possible to minimize damage to the engine during operation. As a result, a technology known as plasma coating has come into our view.
Before we discuss this technology, we first need to understand the problems caused by frictional losses during the engine's operating cycle. In a rapidly running engine, not only do the cylinder walls and pistons experience friction, but the high-temperature environment further accelerates engine wear. Tribology is the discipline that focuses on the interactions between moving surfaces. Reducing friction can effectively extend the service life of mechanical systems. That’s precisely why we need to perform regular maintenance on our vehicles and replace the engine oil at scheduled intervals. Besides the friction between pistons and cylinder walls, other components such as the fuel injectors, high-pressure fuel pumps, valve train parts, and bearings are also prone to wear and tear. And... Plasma spraying The technology involves applying friction-reducing coatings to these wear-prone components in order to minimize friction and wear. Currently, the primary materials used include wear-resistant substances such as ceramics and alloys. Under specific operating conditions, the spraying process itself is quite complex. The main principle behind it is the utilization of an arc plasma—specifically, an ionized arc characterized by a narrow arc column, high current density, and high gas ionization degree. This type of arc offers advantages such as extremely high temperature, concentrated energy, and excellent stability. The key equipment for plasma spraying includes the spray gun and the powder feeder. The powder feeder delivers wear-resistant material powders into the flame, where they are melted by the highly ionized, high-temperature plasma gas ejected from the nozzle, forming an extremely hot and fast-moving plasma jet. These molten particles are then sprayed onto the substrate material at high velocity, thereby creating a dense plasma coating with strong bonding strength. Since the entire process takes place in an inert gas environment, even under extremely high temperatures, the coating materials remain free from oxidation, ensuring that the coating contains virtually no impurities. Although this technology was initially developed for use in advanced machinery such as engines, today plasma coating technology has already been integrated into the actual production processes of engines, significantly enhancing their wear resistance and effectively extending their service life.
Relevant Information
The complete set of plasma-sprayed equipment has been shipped to the customer’s site in Thailand.
Core spraying equipment: SX-80 plasma spray main unit, with a 15,000℃ flame suitable for multiple materials including zirconia and silicon carbide; powder feeding accuracy of ±1%, and coating thickness tolerance ≤ ±5 μm. Environmental protection support system: Customized soundproof booth + pulse dust collector—effectively addressing spray noise pollution while achieving highly efficient dust recovery, compliant with Thai environmental standards. Automated equipment: 6-axis industrial robot + intelligent spray cart, enabling precise spraying of complex workpieces and automated loading/unloading, boosting production efficiency by 40%.
On-site engineers provide hands-on training, focusing on the core operations of plasma spraying equipment such as the SX-80. Sanxin has customized a complete solution for its customers, including an automated spraying robotic arm, a soundproof booth, and a dust removal system—ensuring both high spraying efficiency and compliance with environmental standards.
Guangzhou Sanxin Thermal Spraying Turntable Shipment
Guangzhou Sanxin Company manufactures single-station and multi-station thermal spray turntables, which can be paired with plasma equipment, supersonic equipment, and arc equipment. We offer rapid, customized production tailored to customer requirements and product dimensions. A thermal spray turntable is a high-precision rotary worktable specifically designed for thermal spraying processes—including flame spraying, plasma spraying, and arc spraying. By providing controllable rotational speed and exceptional stability, it ensures uniform coating thickness on the workpiece surface, thereby enhancing spraying efficiency and quality.
SX-80 plasma equipment is being used at a customer site in Russia.
SX-80 plasma equipment is being used at a customer site in Russia.
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