Ultrasonic Spray Coating Machine for High-Pressure Injectors

Ultrasonic Spray Coating Machine for High-Pressure Injectors

In CT and interventional radiology clinical diagnosis and treatment, high-pressure injectors are responsible for the high-speed and precise delivery of contrast agents. The stability of the injector plunger and the retention of contrast agents directly affect the imaging quality and treatment safety. Traditional silicone oil coating processes generally suffer from problems such as uneven coating thickness, silicone oil precipitation, fluctuating injection resistance, and contrast agent residue adhering to the injection wall. Cheersonic Ultrasonic Spray Coating Equipment has launched a dedicated medical silicone oil coating solution for high-pressure injectors. Utilizing a baked siliconization process, it achieves stable mass production of nano-scale ultra-thin lubricating coatings, becoming the preferred process for manufacturing high-pressure contrast injectors.

The core of this solution is the coating of the injector plunger and the inner wall of the barrel with a medical-grade silicone oil functional coating. The coating possesses two core clinical values: firstly, it continuously reduces plunger sliding friction, ensuring uniform injection speed under high-pressure conditions and eliminating problems such as flow rate fluctuations, plunger jamming, and sudden pressure changes, thus guaranteeing precise and controllable contrast agent dosage; secondly, it forms a hydrophobic interface, effectively preventing contrast agent adsorption and adhesion to the wall, reducing drug residue, improving contrast agent utilization, and avoiding imaging artifacts caused by drug residue.

The entire process employs an ultrasonic spraying + baked siliconization route. The Cheersonic ultrasonic spraying machine utilizes high-frequency ultrasonic atomization to disperse the medical silicone oil solution into uniform micro-droplets, depositing them onto the workpiece surface in a non-contact, gentle spraying manner. After temperature-controlled baking and curing, a firmly bonded siliconized film is formed, with the coating thickness stably controlled within the ultra-thin range of 100–400 nm. Compared to dip coating and traditional pneumatic spraying, the ultra-thin coating achieves long-lasting lubrication while significantly reducing free silicone oil, avoiding the clinical risks associated with silicone oil particle shedding.

The process boasts significant advantages, perfectly suited to the demands of large-scale medical device production. First, the overall production cost is moderate; the ultrasonic atomization material utilization rate is high, and silicone oil consumption is significantly lower than traditional spraying processes, ensuring good economic viability for long-term mass production. Second, lubrication performance is stable; the siliconized coating after baking and cross-linking exhibits strong adhesion and is not prone to failure under continuous high-pressure reciprocating sliding conditions, with high batch-to-batch consistency in push-pull force. Third, it exhibits excellent biocompatibility; using compliant medical-grade silicone oil raw materials, the coating is non-cytotoxic and does not react with contrast agents. Fourth, it is compatible with standard medical device sterilization procedures; after ethylene oxide (EO) sterilization, the coating shows no significant attenuation in lubrication performance and surface hydrophobic properties, meeting the sterile requirements for disposable high-pressure injectors.

Traditional pneumatic spraying is prone to localized silicone oil accumulation and significant thickness variations, causing fluctuating plunger resistance; dip coating processes result in excessive silicone oil load, making it difficult to control the risk of free silicone oil. Cheersonic ultrasonic spraying system supports multi-axis automated configuration, with fully digitally adjustable spraying flow rate, atomization parameters, and movement speed. It offers excellent coating thickness repeatability, can be integrated into cleanroom production lines, and is suitable for batch processing of high-pressure contrast injectors of various specifications. The equipment’s material-contacting components are made of stainless steel and PTFE clean materials, ensuring easy cleaning and preventing cross-contamination, thus complying with medical device GMP clean production standards.

With the increasing prevalence of interventional imaging equipment, the market demands for higher drug delivery accuracy and product stability from high-pressure injectors. Achieving a baking-type siliconized ultra-thin silicone oil coating through ultrasonic spraying solves two long-standing manufacturing challenges: unstable plunger sliding and contrast agent adhesion. Cheersonic Ultrasonic focuses on developing precision medical coating processes, providing high-pressure injector manufacturers with a one-stop solution encompassing equipment customization, process debugging, and sample prototyping, helping medical consumable companies improve product quality and build differentiated process competitiveness.

About Cheersonic

Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.

Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.

If you have any technical questions, customization demands, or procurement inquiries about ultrasonic atomization nozzles, feel free to contact our professional sales and technical team for detailed parameters, customized solutions, and industry application support.
Email: market2@cheersonic.com