Rangjin Continues Delivering Fully Automated Potting Lines for a Leading Home Appliance Company

Home appliances are essential to daily life, and the control board serves as the core control center connecting the electrical and mechanical components of these products. It is composed of a microprocessor, power transformer, rectifier components, and other electronic parts. As home appliances continue to evolve in functionality and become more sophisticated, the requirements for control boards are also increasing. Potting is an effective way to enhance their stability and durability.

Since 2025, Rangjin has continuously supplied a leading home appliance manufacturer in India with more than 20 potting machines and 15 fully automated potting lines for control boards. With innovative thinking and leading technology, Rangjin is helping its customer write a new chapter in smart manufacturing for the home appliance industry.

Potting Offers the Best Solution for Control Boards

Steady economic growth has become a driving force behind the expansion of the home appliance industry. In the future, consumer demand for household appliances will continue to move toward higher-end and smarter products. Customer demand not only drives innovation and progress among appliance manufacturers, but also places higher requirements on product safety.

The control board of a washing machine is its “brain.” Since most household washing machines operate in wet environments and are exposed to vibration during use, manufacturers typically use automated potting equipment to protect the electronic components on the control board. This provides reliable protection for the board’s “brain,” improving its resistance to moisture, water, mildew, vibration, insulation, and overall safety, while extending service life.

For white goods, the potting compound used in control board applications is generally a flame-retardant two-component polyurethane sealant that meets environmental requirements. It is transparent in appearance, moderately hard, and offers excellent waterproof and insulating performance. It is well suited for sealing electronic controllers used in environments with vibration, humidity, or corrosive conditions, providing protection against shock, moisture, insulation failure, and corrosion.

As industry competition becomes increasingly intense, appliance manufacturers are placing greater emphasis on production line layout, production efficiency, yield, quality, and equipment cost control. As a result, their requirements for equipment suppliers are also rising, and equipment is increasingly moving toward customized non-standard solutions. Against this backdrop, Rangjin has launched a turnkey line solution combining standard modules with customized non-standard modules. Tailored to each customer’s needs, the company provides mature potting equipment and fully automated potting solutions for control modules in washing machines and other home appliances. The full line achieves fully automated potting, with fast speed, high precision, high efficiency, and strong stability, enabling intelligent and diversified production while safeguarding appliance quality and supporting the rapid growth of the home appliance market.

Coordinated Progress, Continuous Delivery of 15 Home Appliance Control Board Potting Lines

To further improve production efficiency and meet the customer’s higher requirements for new potting processes in home appliances, Rangjin has remained closely aligned with industry trends, continuously investing in R&D and technical innovation for appliance potting applications, and constantly upgrading and optimizing its products to adapt to market developments and provide customers with diversified options.

At the beginning of 2025, Rangjin’s project team began preliminary discussions with the leading home appliance company. After gathering the customer’s requirements, the team immediately held internal workshops and developed a detailed bidding plan with responsibilities assigned to individuals and deadlines set by the day. An online and offline joint discussion mechanism was established to enable real-time communication at any time and from any place.

The company’s leadership organized technical and business teams to hold project review meetings, carefully examining every detail from commercial requirements to technical proposals. In the end, the team delivered a flawless bid. During the tender process, the project team provided comprehensive, detailed, and in-depth responses to both business and technical questions. Their sincere service attitude and strong professional capabilities earned high trust from the customer.

With an outstanding technical proposal, a professional management team, and extensive industry experience, Rangjin successfully won the fully automated potting line project for the washing machine control boards. This win represents another important success for Rangjin and reflects the customer’s strong recognition of the company’s technical strength and innovation capabilities, as well as its deep expertise in fluid dispensing applications.

In mid-2025, Rangjin officially signed the contract with the customer. The partnership then entered a long-term cooperation phase spanning nearly 10 years, with both sides sharing their respective strengths and continuing joint R&D efforts in areas such as refrigerator and air conditioner manufacturing, as well as broader home appliance automation. This collaboration is actively helping to advance the development of potting technology in the home appliance sector.

Control board potting is an indispensable step in home appliance manufacturing. Choosing the right potting equipment, ensuring the accuracy and consistency of the mixing ratio and dispensing volume, avoiding air bubbles, allowing proper curing under a stable temperature environment for sufficient time, and carrying out inspection are all key to achieving an effective potting result. Only by paying attention to these factors can the stability and reliability of control boards be ensured, thereby improving the quality and performance of home appliance products. The 15 fully automated control board potting lines supplied by Rangjin to this customer have not only been applied to washing machine control board potting, but have also been extended to refrigerator and air conditioner control boards and other home appliance applications.

During project implementation, Rangjin provided comprehensive technical validation and solution analysis services. Its professional technical team worked closely with the customer’s actual annual requirements and operational conditions, continuously developing and updating practical implementation plans to ensure smooth project progress and successful execution. Rangjin also actively communicated and collaborated with the customer to jointly solve potential technical challenges, ensuring project quality and effectiveness and helping the customer achieve high-efficiency, high-quality production.

Through technological and product innovation, Rangjin has continuously introduced new solutions and achieved full coverage from forward-looking technologies to application-based technologies and products that fill market gaps, building an excellent quality assurance system driven by technology. From 2D cameras to 3D cameras, from single-track conveying to multi-track conveying, and from single-layer layouts to double-layer layouts, Rangjin has gone through the delivery of 15 fully automated home appliance control board potting lines, continuously exploring, refining, and improving its solutions. Ultimately, the company has provided an advanced potting solution for home appliance control boards.

Smart Manufacturing for Home Appliances

Through one innovation after another, Rangjin and the leading home appliance company have jointly completed the overall layout of the fully automated control board potting line. The line consists of a lift, transfer table, inline potting machine, transfer unit, curing oven, vision system, return line, and other equipment. It can complete loading, product preheating, product potting, high-temperature curing, and unloading, enabling intelligent control of the potting process and achieving a defect rate of less than 1 in 1,000, while reaching the goals of intelligent production, automation, and maximum throughput.

This fully automated control board potting line for home appliances offers the following technical features:

First, the equipment is equipped with an intelligent vision system with 3D scanning capability. After front-end imaging, the system automatically identifies the product type and loads the corresponding potting program. The product then enters the potting area, where rear-end imaging is performed to automatically identify the potting path and carry out fully automated potting without manual intervention. The three-axis robot uses a servo motor plus ball screw drive, ensuring stable and reliable operation.

Second, the supply system is equipped with four storage tanks. The A and B components are stored and supplied separately, enabling continuous large-volume feeding with heating and temperature control, vacuum degassing, and stirring functions to prevent sedimentation. One tank serves as backup while the other is in use, with automatic switching to ensure uninterrupted feeding and improved efficiency.

Third, the metering system uses A/B gear pumps. This approach offers a simple and compact structure, small size, light weight, good manufacturability, high cost performance, strong self-priming ability, a wide speed range, resistance to shock loads, and easy maintenance. Pressure sensors are installed at the pump outlets to monitor pipeline pressure. If an abnormal pressure condition occurs, the system alarms and stops automatically. The dual metering system and dual mixing valves independently meter and dispense the material, ensuring stable ratio control and output while improving potting efficiency.

Fourth, the control system integrates an industrial PC, display, Rangjin motion control card with advanced algorithms, Rangjin’s self-developed potting software, and PLC control. It enables precise automatic metering and dispensing, with a user-friendly interface that allows operators to set the number of potting cycles, potting volume, and interval times. Operation is simple and convenient.

Fifth, the mixing system uses a dynamic mixing valve. Through a dual-liquid dynamic dispensing valve and a dynamic mixing tube, the two-component adhesive is mixed accurately in proportion. The adhesive is mixed only as needed, so the amount dispensed is mixed instantly, making the process fast, efficient, and economical. The system delivers rapid dispensing, high efficiency, and thorough, uniform, and consistent mixing. A suction-back material recovery function prevents stringing and leakage, and the system is equipped with a stirring abnormality alarm to effectively prevent mixing issues. It also features an automatic cleaning device for simple operation and thorough cleaning.

Sixth, the conveyor line uses a double-speed chain and motor drive, with adjustable conveying speed. The curing oven has a double-layer, six-row design, with the upper three rows used for product curing and the lower three rows for preheating. This multi-track integrated design reduces floor space and energy consumption.

Seventh, the entire line has an attractive appearance and a well-planned design, solving the customer’s space limitations while meeting production capacity requirements. The line is also preconfigured with MES interfaces for future system integration and data upload, including production quantity, equipment abnormalities, and abnormal event timestamps. This marks another major step forward in the development of automated potting production lines.

Rangjin’s fully automated control board potting line for home appliances is suitable for a wide range of AB adhesive potting, dispensing, and circular application processes. It is now widely used by manufacturers of washing machines, dishwashers, refrigerators, air conditioners, and other household appliances. With more than 18 years of deep industry experience, Rangjin has remained committed to product innovation and technical applications, providing home appliance manufacturers with environmentally friendly, reliable potting equipment and integrated solutions designed to ensure stable appliance operation and safer home life.

Rangjin makes home life smarter and better. In the future, Rangjin will continue to deepen its cooperation with this leading home appliance company and looks forward to using this project as an opportunity to create more digital, intelligent, and automated benchmark projects for the home appliance industry.