Automated Liquid Dispensing System Adhesive Dispensing Dosing Machine

We Daheng Automation specialize in different types of potting and dispensing system. No matter what your resin application requirements look like: we can do most of them in our fully equipped lab. We can handle 1- and 2-component polyurethanes, epoxies, acrylics, silicones, temperature, humidity and UV curing materials. They can be from low- to high-viscosity, filled or unfilled and even high abrasive for thermal conductivity.

Main Technologies

Before introduction, please noted that AB glue mix with certain ratio (1:1~10:1), there are 2 metering pumps in a machine to measure and control dispensing volume of A glue and B glue.

Gear pumps Working principle:

2 gears mesh in a sealed room, when 2 gears rotate, the glue will be taken from one side to the other side.

Advantage:

1. The cost is cheap.

2. Only suitable for transparent glue without stuff.

3. Suitable for low viscosity glue, low density.

4. Suitable for non change glue mixing ratio, or change in small range.

5. Suitable for low accuracy demand on gluing dispensing.

6. Suitable for non-large flow gluing.

Screw pump Working principle:

When the motor runs, it will drive the screw bar rotating in sealed room, at this moment, the screw bar rotating and pushes the liquid from one side to another. This pump controls the liquid volume by control the rotating speed.

The main working parts of screw pump are the screw of the eccentric helix (rotor) and the screw bushing with the inner surface showing a double helix surface (stator).

Its working principle is when the motor drive pump shaft rotation, screw on the one hand around the axis of its own rotation, on the other hand it also along the lining of the inner surface of the rolling, so as to form the sealed chamber of the pump.

Every turn of the screw, the liquid in the sealing chamber pushes forward a pitch, with the continuous rotation of the screw, the liquid spirals from one sealing chamber to another sealing chamber, and finally extrudes the pump body.

Features: high flow rate, continuous glue supply, suitable for glue with high additive.

Advantage:

1.The cost is lower .

2. Suitable for additive and density glue.

3. Suitable for non change glue mixing ratio, or change in small range.

4. Suitable for low accuracy demand on gluing dispensing.

5. Suitable for big flow gluing.

Patent Double Cylinder plunger pumps Working principle:

As the pushing bar push forward and the room volume change, and the gluing amount change, which means what amount of the bar push forward is the amount of gluing out.

1. In this case, this pump can control in very high accuracy, and mix ratio can be change in larger scale.

2. And also, the bar doesn’t touch the tank surface, even if there is stuff in the glue, no wearing caused.

3. This pump has unique design of anti-back flow device, even if one side pressure is big too much, it won’t back flow, and also, it is good for frequent start and stop dispensing.

4. Long life time because no wearing.

5. B pump with anti-crystallization system that is feasible for PU glue .

Overview of Glue Dispensing Machines

A glue dispensing machine, also known as an AB glue dispensing machine, automates the process of filling products with glue. These machines feature glue dispensing systems designed for automatic proportioning, quantitative filling, and circulation management, ensuring products achieve optimal sealing, fixing, and waterproofing. This automated operation resolves issues related to low efficiency and poor quality in traditional methods, significantly reducing labor costs and enhancing productivity and product quality.

Features of Glue Dispensing Machines

The glue dispensing epoxy resin dispensing machines offer high cost-effectiveness, with a single device capable of replacing 2 to 5 workers, enabling a return on investment within six months.

Industry Applications

1.Potting&Encapsulation &Casting: electronics componnets , PCB board, Capacitor, power supply, transformer, ignition coil, reverse sensor, circuit board, filter products ,underwater parts, electronic ballast ,aviation parts, aerospace parts....
2.Dispensing&Dosing : LED strip , led lamp , led bulb , aluminum,led screen , display module ,medical parts,medical liquid filling .... 3.Bonding&doming : LCD screen ,LOCA bonding,ABS plastic,different types of stickers , badge , keychains , souvenirs ,arts , photo frame , and other arts graphics....

Glue dispensing machines have a wide range of applications, including but not limited to:

LED Display Screens: Automated liquid dispensing systems ensure seamless assembly and durability.

LED Energy-Saving Lamps: Efficient adhesive dispensing systems for energy conservation.

LED Power Supplies: Precision dispensing for insulation and protection.

Computer Power Supplies: Safeguarding components against environmental factors.

Sensors and PCB Boards: Fluid dispensing systems for protecting delicate circuits.

Solar Panels and Coils: Ensuring structural integrity and environmental resistance.

Soft Light Strips and Point Light Sources: Optimizing performance with precise glue application.

Gluing and Potting of Electronic Components

Glue and potting play a crucial role in protecting electrical components and extending their service life. Potting, achieved using automated adhesive dispensing systems or semi-automatic glue potting machines, involves filling devices with polyurethane, silicone, or epoxy resin. Once cured, these materials become thermosetting polymers, providing bonding, sealing, and protective coatings.

The Role of Glue Potting in Electronics

Protecting Electrical Components: The primary function of electrical potting glue is protection. Potting dispensing machines apply glue to circuit boards, offering bonding and impact resistance, thus safeguarding components against vibrations and impacts.

Extending Service Life: Potting protects components from heat, moisture, temperature fluctuations, and UV exposure, thereby prolonging their service life.

Improving Practicality: Cured potting glue forms a moisture-proof and waterproof layer, enhancing the usability of electrical devices even in harsh outdoor environments.

Potting also helps prevent oxidation and corrosion by isolating components from moisture and oxygen, ensuring reliable performance.

IC Chip Semiconductor Glue Filling

Production Process: The production of chips involves complex steps like design, production, packaging, and testing. Chip potting glue facilitates easy disassembly, allowing for corrections without compromising functionality.

Temperature Resistance: Once cured, the glue withstands extreme temperatures, maintaining elasticity without cracking, crucial for outdoor applications.

Moisture Protection: Despite potential cracking from thermal expansion, the glue maintains its moisture-proof performance, ensuring chip integrity.

Main Application Industries

Automotive and Industrial Electronics

Electrical Industry

New Energy and Lighting

Aviation, Aerospace, and Navigation

Communications and Power Supply

Power Tools and Household Appliances

Main Product Applications

Sensors, Transformers, and Ignition Coils

Capacitors, Module Power Supplies, and Control Systems

Motors, Inverters, and Electronic Components

Applied Resins

The machines accommodate two-component resins like epoxy, polyurethane, and silicone, which are essential for effective potting and encapsulation.

Maintenance and Care of Glue Filling Machines

Proper maintenance is vital for the efficient operation and longevity of glue filling machines.

Here are key maintenance practices:

Regular Cleaning: Clean nozzles, pipes, and filters regularly to prevent clogging.

Lubrication Check: Ensure adequate lubricating oil levels, adding or replacing as necessary.

Electrical Inspection: Regularly check electrical components for faults, repairing or replacing as needed.

Avoid Overload: Prevent overloading to avoid equipment damage.

Pressure Checks: Monitor pressure settings and adjust as needed.

Glue Quality: Inspect glue quality, replacing any deteriorated or contaminated glue promptly.

Train Maintenance Personnel: Equip staff with the knowledge to operate and maintain the machines correctly.

Maintenance Records: Keep detailed records of maintenance activities for analysis and troubleshooting.

These practices ensure that glue filling machines continue to operate efficiently and effectively, meeting the demands of modern industrial applications.