Guide to Types of Anaerobic Adhesive Dispensing Valves
Release time:
2025-02-24 14:42
Source:
Laike Technology
**Guide to Anaerobic Adhesive Dispensing Valve Types**
The anaerobic adhesive dispensing valve is a specialized device used for dispensing, widely applied in various fields such as electronics, optoelectronics, communications, and industrial manufacturing. Its characteristics of high precision, strong stability, and ease of maintenance make the anaerobic adhesive dispensing valve a key component in many production lines. This article will detail the types, working principles, and application scenarios of anaerobic adhesive dispensing valves, helping readers better understand and choose the dispensing valve that suits their needs.
1. Definition and Characteristics of Anaerobic Adhesive Dispensing Valve
The anaerobic adhesive dispensing valve is a device that uses the principle of pressure bar propulsion to accurately dispense anaerobic adhesive as needed. It mainly consists of components such as the pressure bar, valve body, valve needle, anaerobic adhesive barrel, and solenoid valve, which work closely together to form the entire dispensing system. The characteristics of the anaerobic adhesive dispensing valve are mainly reflected in the following aspects:
1. High Precision: The anaerobic adhesive dispensing valve uses a high-precision propulsion system that can accurately control the dispensing amount, ensuring consistency in the amount of adhesive applied each time.
2. Strong Stability: The valve body and valve needle are made of high-quality materials, which have good corrosion resistance and wear resistance, maintaining stability during long-term use.
3. Easy Maintenance: The valve needle and valve body can be disassembled and replaced, facilitating daily maintenance and cleaning, thus reducing maintenance costs.
4. Wide Applicability: The anaerobic adhesive dispensing valve can be used for various types of dispensing operations, such as SMT assembly, LED chip dispensing, and general PCB dispensing.
2. Types of Anaerobic Adhesive Dispensing Valves
Anaerobic adhesive dispensing valves can be classified into various types based on different classification criteria. The following are the types of anaerobic adhesive dispensing valves listed according to common classification methods:
1. Classification by Working Principle
* Pneumatic Valve: The pneumatic valve is driven by timed air pulses to open or close the sealing ring, allowing the adhesive to flow out. Pneumatic valves are characterized by fast operation speed and strong reliability, widely used in various dispensing operations.
* Electric Valve: The electric valve controls the flow of adhesive through a solenoid valve, featuring fast response speed and high control precision. In situations requiring high-precision dispensing, electric valves are a better choice.
2. Classification by Structural Characteristics
* Spray Valve: The spray valve is suitable for low-viscosity fluids, especially those with a viscosity of less than 1000 cps. It ensures that the fluid is atomized before spraying and quickly returns to its original state after spraying, preventing blockage in the valve.
* Needle Valve: The needle valve has strong operability for liquids and is suitable for various single-component fluids, commonly used in micro adhesive dispensing applications. The needle valve is adjustable and can operate high-viscosity non-filled fluids under high pressure.
* Diaphragm Valve: The diaphragm valve is used for adjustable, high-frequency dispensing applications and is suitable for many low to medium viscosity fluids, such as adhesives, solvents, and abrasive materials.
* Short Tube Valve: The short tube valve is suitable for high-viscosity paste, syrup, and gel-like fluids, and must operate under high pressure. Additionally, the short tube valve is also suitable for line drawing applications.
* Volume Valve: The volume valve is used for high-precision micro-dispensing operations and is divided into pneumatic control valves and electric control valves. The electric control valve, also known as a screw valve, is suitable for micro adhesive dispensing applications with high-viscosity fluids.
3. Application Scenarios of Anaerobic Adhesive Dispensing Valves
Due to their high precision and stability, anaerobic adhesive dispensing valves are widely used in various production fields. Here are some typical application scenarios:
1. SMT Chip Assembly: The anaerobic adhesive dispensing valve can accurately dispense adhesive, ensuring the fixation and connection quality of chip components, thus improving production efficiency.
2. LED Chip Dispensing: The anaerobic adhesive dispensing valve can adjust the dispensing speed and amount, ensuring the packaging quality of LED chips and avoiding waste and insufficient adhesive.
3. PCB Dispensing: The anaerobic adhesive dispensing valve can quickly adjust the dispensing amount and range, improving dispensing efficiency and product quality, ensuring the stability and reliability of PCB boards.
4. Maintenance and Care of Anaerobic Adhesive Dispensing Valves
To ensure the long-term stable operation of the anaerobic adhesive dispensing valve, regular maintenance and care are required. Here are some common maintenance and care measures:
1. Regularly clean the valve body and valve needle to prevent impurities and adhesive residue from causing blockages.
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.
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