How to choose a conformal coating valve?
Release time:
2025-04-10 09:00
Source:
Leiko Technology
How to Choose a Conformal Coating Valve? - Leiko Technology Provides Professional Guidance
In fields such as electronics manufacturing, automotive electronics, and aerospace, conformal coating (moisture-proof, salt-spray-proof, and corrosion-proof) technology is crucial for the long-term reliability of products. As a core component of conformal coating spraying, the performance of the coating valve directly affects the coating effect and production efficiency. How to choose the right coating valve? Shenzhen Leiko Technology Co., Ltd., with years of experience in fluid control, analyzes the key selection points for you.
I. Main Types of Conformal Coating Valves Main Types of Conformal Coating Valves
1. Dispensing Valve (Precise Control)
Applicable Scenarios : Suitable for high-precision, small-area coating, such as local protection of PCB boards.
Advantages : Precise control of glue dispensing, avoiding waste, suitable for complex circuit board coating.
Recommended Model : Leiko piezoelectric jet valve (fast response, no dripping).
2. Spray Valve (Large Area Coverage)
Applicable Scenarios : Suitable for whole-board spraying or large-area protection, such as automotive electronic modules.
Advantages : Uniform atomization, high coverage efficiency, suitable for mass production.
Recommended Model : Leiko automatic spray valve (adjustable atomization particle size, adaptable to different viscosity conformal coatings).
3. Spray Atomization Valve (Ultra-thin Uniform Coating)
Applicable Scenarios : Scenarios with strict requirements on coating thickness, such as military and medical electronics.
Advantages : Non-contact spraying, uniform coating, avoiding bubbles and accumulation.
Recommended Model : Leiko spray valve coating system (high precision, low loss).
II. Key Factors in Selection Main Types of Conformal Coating Valves Key Factors in Selection
1. Viscosity of Conformal Coating
Different viscosities of conformal coatings (such as low-viscosity acrylic esters and high-viscosity polyurethanes) require matching different valve bodies. Leiko coating valves support multiple viscosity adjustments to ensure stable glue dispensing.
2. Coating Precision Requirements
High-density electronic components require high-precision dispensing valves (such as piezoelectric valves).
Spray valves can be used for large-area protection.
3. Production Cycle and Efficiency
High-speed production lines require fast-response solenoid valves or jet valves, while high-precision applications can use servo-driven dispensing systems.
4. Automated Integration Requirements
Leiko coating valves support linkage with PLC and vision positioning systems to achieve fully automatic coating, reduce manual intervention, and improve consistency.
III. Leiko Technology - Your Conformal Coating Expert
Shenzhen Leiko Technology Co., Ltd. focuses on fluid control solutions and provides a variety of Main Types of Conformal Coating Valves and automated spraying equipment, with advantages including:
High-Precision Control ——Small glue volume error, avoiding overspray or undercoating.
Strong Compatibility ——Adaptable to various conformal coatings (including solvent-based and UV-curable types).
Intelligent System Integration ——Supports customized solutions to match your production line.
If you are looking for a highly reliable conformal coating valve, please contact Leiko Technology. We will provide you with professional selection support!
Related News
How can daily maintenance help extend the service life of a valve body?
As a precision component that operates at high frequency, the precision dispensing valve requires scientific daily maintenance to extend its service life and maintain dispensing accuracy. Shenzhen Laike Technology has compiled the following key maintenance points for you: Daily cleaning is crucial and should not be overlooked. After finishing work, promptly remove any residual adhesive from the exterior of the valve body, especially around the nozzle and plunger area. Once cured, adhesive can cause blockages or wear, affecting subsequent use. It is recommended to gently wipe with a suitable cleaning solvent, taking care not to damage the seals. Regularly inspect sealing components—seals and other parts will naturally degrade over time during prolonged operation. We recommend checking their condition periodically based on usage frequency. If you notice signs of hardening or wear, replace these components promptly to prevent adhesive from seeping into the valve body and causing more serious damage.
The stringing issue during the dispensing process is often closely related to fluid properties, equipment parameters, and process settings. Drawing on years of industry experience, SZLKTE has compiled and optimized key points for you: Fluid temperature control is crucial. Proper heating can reduce the viscosity of the adhesive, improve its flowability, and minimize stringing and trailing. SZLKTE’s dispensing valves can be equipped with precision temperature-control modules to ensure that the fluid remains in a consistently stable working state. The back-suction parameters must be finely adjusted. The negative-pressure back-suction applied at the moment the glue dispensing stops can effectively cut off the adhesive flow, preventing dripping and stringing. We recommend gradually adjusting the amount and speed of back-suction according to the adhesive’s viscosity until you find the ideal balance.
SZLKTE takes a multi-dimensional approach to ensure zero errors and long service life for its products even under high-speed, continuous operation. The piezoelectric valve series employs piezoceramic actuation technology; its non-contact drive design eliminates mechanical wear common in traditional solenoid valves, enabling a service life of over one billion cycles. At the same time, these valves deliver millisecond-level response times, completely eliminating trailing and stringing issues. The needle valve KC-9870, on the other hand, features a specially engineered, wear-resistant material for its needle component, offering exceptional resistance to abrasion and corrosion. Even in industrial environments with prolonged operation, this valve maintains outstanding stability. Moreover, its components can be quickly disassembled and maintained, significantly reducing production downtime.
Contact Dispensing vs. Non-Contact Jetting Valves: How Should You Choose for Micron-Level Processes?
Contact dispensing involves the needle making physical contact with the substrate surface to apply the fluid. Its main advantage lies in its strong adaptability to high-viscosity fluids and relatively controllable dispensing process. However, since it requires coordinated movement along the Z-axis, the dispensing speed is limited. Additionally, there is a risk of the needle colliding with and damaging the workpiece or deforming the needle itself. Therefore, careful evaluation is necessary when applying this method in miniaturized packaging scenarios. In contrast, non-contact jetting valves use a driving mechanism to rapidly spray adhesive onto the workpiece surface without any physical contact between the needle and the substrate. This feature makes them ideally suited for substrates with uneven surfaces or those that are fragile. They excel in micron-scale processes such as bottom-fill applications for chips and precision coating. The jetting method eliminates the need for Z-axis movement, significantly boosting production efficiency while also avoiding common issues associated with contact dispensing, such as stringing and trailing.
The stability of the piezoelectric valve dispensing process directly determines product quality. Common issues such as uneven dispensing, stringing, and glue leakage can be effectively addressed through parameter adjustments and optimized matching. Laike’s piezoelectric valves support multi-level parameter adjustments, enabling precise matching of pressure, injection frequency, and nozzle aperture according to the specific characteristics of different fluids.
Blocking the hole is Piezoelectric valve The most common failures in dispensing operations are often caused by fluid solidification, residual impurities, and nozzle wear, which directly affect dispensing accuracy and efficiency. Given the structural characteristics of piezoelectric valves, these issues can be addressed in three steps: “diagnosis—cleaning—inspection.” First, stop the machine and visually inspect the nozzle for obvious glue deposits or foreign objects, determining whether the blockage is temporary or a persistent issue caused by nozzle wear.