Full-Auto Filter Element Ultrasonic Welding Machine

As a specialized Chinese manufacturer of ECO Filter Production Equpment, Pulan offers a high-quality Full-Auto Filter Element Ultrasonic Welding Machine for filter elements. It features PLC program control and touchscreen operation, with fully automated processes for feeding, welding, and unloading. It boasts a production capacity of 4 pieces per minute and an operating height of 250 mm.

What is a Full-Auto Filter Element Ultrasonic Welding Machine?

A Full-Auto Filter Element Ultrasonic Welding Machine is an automated system developed for ultrasonic edge sealing of cabin air filters. It integrates a feeding guide, ultrasonic welding horns, pneumatic welding cylinders, discharge guide, tape feeding unit, and PLC-based control system into one production unit.

During operation, ultrasonic vibrations at extremely high frequencies are transmitted to the thermoplastic contact surfaces of the filter. The friction generated at the joint creates localized heat, causing the material to melt rapidly. Under controlled pressure, the molten surfaces fuse together and solidify into a strong molecular bond, producing welds whose strength is close to that of the original material.

Applications and Machine Structure

Applications: Ultrasonic sealing and welding of both side edges of cabin air filters.

Main Components:

Working Principle and Production Process

Working Principle: 

Ultrasonic energy is transmitted to the thermoplastic contact surfaces of the filter, producing high-frequency vibrations that generate localized heat at the welding area. The plastic melts almost instantly and is fused under pressure. After the ultrasonic vibration stops, pressure is maintained briefly to allow the joint to solidify, resulting in a durable molecular bond with welding strength close to the original material.

Production Process:

1. Loading: Place the filter into the feeding guide with the joint facing upward. If sealing tape is required, position it between the joint surfaces. Align the filter center with the guide block and insert the following pleat into the upper and lower guide rails.
2. Feeding: Push the filter gently forward until the infrared positioning sensor detects its arrival.
3. Positioning: The servo motor drives the ball screw while the positioning cylinder retracts, accurately moving the filter between the two welding heads.
4. Ultrasonic Welding: The pneumatic cylinders press both ultrasonic horns simultaneously onto the filter edges to complete the welding process.
5. Discharging: The next filter advances the previous finished filter, which exits through the discharge guide.
6. Continuous Production: The cycle repeats automatically for uninterrupted operation.

Key Features

1. Ultrasonic Welding Without Adhesives: Plastic is bonded by ultrasonic energy instead of hot melt glue, providing an environmentally friendly process and weld strength close to the base material.
2. Fully Automatic PLC Control: Feeding, positioning, welding, and unloading are completed automatically, reducing manual labor while maintaining a production rate of 4 pieces per minute.
3. High-Precision Servo Positioning: A servo-driven ball screw accurately positions each filter, ensuring consistent welding quality and repeatable results.
4. Simultaneous Dual-Side Welding: Two ultrasonic welding horns operate at the same time, completing both side seals in a single cycle for higher productivity.
5. Optional Tape Feeding Device: The tape feeding unit can be installed or omitted according to the customer's manufacturing process without affecting welding performance.
6. Adjustable Feeding Guide: The guide rail gap can be easily adjusted using the control knob and guide block, allowing the machine to process filters of different thicknesses.
7. Touchscreen Operation: The PLC and touchscreen interface simplify parameter setting while providing real-time machine status and operating information.
8. CE-Certified Safety Design: Multiple models comply with CE standards and include emergency stop protection, safety guards, and reliable grounding for secure operation.

Technical Parameters

Installation Precautions

1. Install the machine on a flat, clean, and well-ventilated floor away from excessive heat and dust.
2. Leave at least 1.5 meters of clearance at the front and rear and 1 meter on both sides.
3. Use a forklift with a minimum lifting capacity of 1 ton for transportation.
4. Secure the machine firmly and ensure it is properly leveled.
5. Connect to a dedicated 380V/50Hz power supply with proper grounding.
6. Provide a stable compressed air supply of 0.6MPa.
7. Before operation, inspect the power cable, emergency stop button, and safety guard doors.

Frequently Asked Questions

Q1: What should I do if the weld is burned or not strong enough?

A: The ultrasonic power may not be suitable for the current filter material. Adjust the welding power through the touchscreen or ultrasonic generator according to the filter material, such as PP or nonwoven fabric.

Q2: Is the tape feeding unit mandatory?

A: No. The tape feeding unit is optional. If your production process does not require tape inside the joint, it can be removed without affecting the ultrasonic welding function.

Q3: Can the machine process filters with different thicknesses?

A: Yes. The feeding guide gap can be adjusted by the gap adjustment knob and guide block, allowing the machine to accommodate various filter thicknesses.

Q4: How strong is the ultrasonic weld?

A: Ultrasonic welding re-bonds the plastic molecular structure at the joint, producing weld strength close to that of the original material and significantly stronger than conventional hot melt adhesive bonding.

Purchasing Information

The Full-Auto Filter Element Ultrasonic Welding Machine is designed for high-volume ultrasonic side sealing of cabin air filters. We offer free sample welding services—simply send your filter samples, and we will perform trial welding before returning them for evaluation.

Volume orders are eligible for preferential pricing, and delivery schedules can be confirmed with our sales team. Customized machines with different working heights or special welding requirements are also available. Each machine is supplied with Chinese and English operating manuals, electrical schematics, and a pneumatic parts list.

As a professional manufacturer and exporter of filter welding equipment, Pulan provides factory-direct pricing, a one-year warranty, and long-term spare parts support, including ultrasonic welding horns and pneumatic sealing components. Contact us today for a quotation or arrange a visit to our factory.