World’s First Automatic Snap Band Welding Machine

It replaces rivets and mechanical fastening with continuous metallurgical bonding

High-Speed, Rivet-Free Welding for Stainless Steel Snap Bands and Sealing Rings

KABORY’s world-first Automatic Snap Band Welding Machine is specifically engineered for the automated production of stainless steel snap bands used in industrial filter bags, dust collection systems, ventilation systems, flexible connectors, and industrial sealing applications.

The system replaces conventional rivets, punched holes, and mechanical fastening with precision forming and controlled resistance welding. By integrating automatic strip feeding, fixed-length cutting, circular forming, alignment, four-point welding, counting, and finished-product discharge into one continuous process, it delivers stronger and more consistent joints, cleaner production, reduced manual labor, and improved long-term reliability.

Commercially Proven at a Customer Site in France

During an on-site production test, the machine operated continuously for two hours without any intermediate shutdown.

• Snap band diameter: 125 mm
• Stainless steel strip width: 30 mm
• Stainless steel strip thickness: 0.40 mm
• Continuous production time: 90 minutes
• Finished output: 800 snap bands
• Operators required: 1
• Intermediate machine stops: 0

This verified production result demonstrates an output capacity of more than 3,200 snap bands per eight-hour shift under comparable production conditions.

Set Once, Run Continuously with Minimal Operator Intervention

Once the machine parameters have been properly set and adjusted, no manual intervention is required during normal continuous production.

The system automatically completes strip feeding, fixed-length cutting, circular forming, precision positioning, resistance welding, counting, and finished-product discharge. The welding unit operates continuously and synchronously with the complete production line, ensuring stable cycle times, consistent welding quality, and repeatable finished dimensions.

The operator is only required to monitor the production status and replenish raw materials when necessary. This significantly reduces dependence on manual operation, minimizes production interruptions, and improves overall production efficiency and long-term operating stability.

Industry Background: Why Filter Bag Snap Band Joining Really Matters

In industrial filtration systems, snap bands are far more than simple accessories. They are critical sealing and structural components responsible for maintaining consistent compression, preventing dust leakage, and ensuring airtight performance throughout long-term operation.

In demanding industrial environments, snap bands must withstand:

• Continuous pulse-jet cleaning vibration
• Repeated thermal expansion and contraction
• Sustained radial compression loads
• Long-term operation without loosening, deformation, or loss of sealing force

Under these operating conditions, joint fatigue resistance and circumferential geometric continuity directly determine sealing integrity, dust leakage prevention, system reliability, maintenance intervals, and the overall service life of the filtration system.

Typical Applications

Filter bags, flexible connectors, industrial ducting, pneumatic conveying systems, hose and clamp systems, and other industrial sealing applications where long-term airtight performance and mechanical durability are essential.

Why Traditional Riveted Snap Band Joining Is Fundamentally Limited

Conventional snap band manufacturing relies on mechanical fastening methods, typically including rivets, punched stainless steel strip ends, or localized spot welds.

In standard-duty filtration applications, riveted snap bands have proven reliable and have been widely adopted across the industry.

However, from a structural engineering perspective, mechanically fastened snap bands inherently introduce localized load paths and stress concentration points at drilled holes and fastening interfaces.

In addition, punching operations on stainless steel strips may generate burrs, edge curling, or localized deformation, depending on material hardness, strip thickness, and tooling condition.
These edge irregularities can create sharp local contact points along the inner circumference of the snap band.

Under real operating conditions—such as pulse-cleaning vibration, thermal cycling, and continuous compression loads—these localized features may gradually abrade or cut the filter bag fabric, particularly in high-frequency or high-temperature operating environments.

As industrial filtration and containment systems continue to evolve toward:

• Higher operating temperatures

• Higher pulse-cleaning frequency

• Longer maintenance intervals

• Continuous multi-shift duty cycles

the limitations of mechanically fastened snap band structures become increasingly pronounced.

This is not a manufacturing quality issue.
It is a fundamental limitation of mechanical joint design.

No matter how carefully executed, mechanically fastened snap bands remain assemblies composed of discontinuous structural segments.

From Mechanical Fastening to Continuous Metallurgical Bonding — a cleaner, stronger way to produce filter bag snap bands.

To address these inherent structural limitations, KABORY developed the world’s first automatic Snap Band Welding Machine, engineered specifically for industrial filtration snap band applications.

Instead of relying on mechanical fastening, this system joins snap band ends using four-point controlled fusion welding, forming a continuous metallurgical bond.

This process:

• Eliminates rivets, punched holes, and discrete fastening interfaces

• Removes localized stress concentration points

• Preserves uniform stiffness and geometry along the full circumference

In this system, the snap band is no longer assembled.

It is structurally continuous.

The joint is no longer a connection point, but an integral part of the ring itself, enabling uninterrupted load transfer and true metallurgical continuity.

Engineering Validation of the Automatic Snap Band Welding Machine Under Real Operating Conditions

Long-term sealing reliability is not achieved by increasing local joint strength alone.

It is achieved by eliminating structural discontinuities altogether.

By replacing mechanical fastening with continuous metallurgical bonding, the Automatic Snap Band Welding Machine directly addresses the primary failure mechanisms observed in long-term filtration service:

• Fatigue cracking initiated at joint interfaces

• Progressive loosening under vibration

• Loss of sealing force caused by uneven circumferential stiffness

The result is a snap band structure capable of maintaining stable geometry and consistent sealing performance throughout extended service life.

Real Tensile Strength Test Comparison

Material: SUS301 Stainless Steel
Thickness: 0.40 mm (Welding) 0.45mm(Riveted)
Condition: Same material hardness

Joint Type	Tensile Strength (N)	Difference
Riveted Joint	≈ 4,200 N	baseline
Welded Joint	≈ 7,200 N	+71% improvement

The welded joint demonstrates a clear transition from fastener-dependent separation to uniform metal yielding, indicating a fundamentally stronger and more stable joint structure.

Automation Advantages of the Automatic Snap Band Welding Machine for Structural Consistency

Automation in this system is not introduced merely to increase production speed.

Its primary purpose is to ensure:

• Consistent weld quality independent of operator skill

• Repeatable joint geometry and metallurgical integrity

• Stable production rhythm for industrial-scale manufacturing

• Seamless integration into automated filter bag production lines

By combining controlled fusion welding with automated positioning and process control, the machine delivers repeatable structural performance, not variable craftsmanship.

Key Technical Advantages

• Continuous metallurgical joint without rivets or punched holes

• Uniform circumferential stiffness and load distribution

• Superior resistance to vibration, thermal cycling, and fatigue

• Highly consistent welding quality through full automation

• Designed specifically for stainless steel snap bands used in industrial filtration

Production Workflow

The Automatic Snap Band Welding Machine integrates forming, joining, and quality consistency into a single continuous production workflow:

1. Automatic coil feeding

2. Fixed-length cutting

3. Snap band forming

4. Four-point controlled fusion welding

5. Output counting and stacking

One Operator, Continuous Automatic Production

Once the production parameters have been properly set, the machine automatically completes strip feeding, fixed-length cutting, circular forming, precision alignment, four-point resistance welding, counting, and finished-product discharge.

During normal continuous production, no manual process adjustment is required. The operator is only responsible for monitoring the production status, replenishing raw materials when necessary, and handling routine quality checks.

With a verified production speed of up to 8.9 snap bands per minute, the system has a theoretical production capacity of more than 4,200 snap bands during an eight-hour shift under comparable continuous operating conditions.

Actual shift output may vary depending on snap band diameter, raw-material replacement time, inspection requirements, and site operating conditions.

Compared with traditional riveting processes that require multiple production stations and operators, the KABORY system significantly reduces labor requirements while improving production consistency, joint quality, and overall operating stability.

Compared with traditional riveting production requiring multiple working stations and operators, the KABORY system greatly reduces labor requirements while improving output consistency.

Technical Specifications 

Parameter	Specification
Diameter Range	90–220 mm / 90–300 mm / 90–400 mm
Steel Band Thickness	0.20–0.50 mm
Steel Band Width	25 / 30 / 35 mm ,customizable
Edge Alignment Accuracy	±0.30 mm
Joint Structure	Four-Point Controlled Fusion Welding
Output Capacity	8 pcs/min(Real)
Power	380V, Three-phase
Air Supply	0.5–0.7 MPa
Control System	PLC  Control
Welding Technology	Four-Point Controlled Fusion Welding
Material Compatibility	Stainless steel
Safety Features	Emergency stop, protective housing

A Structural Redefinition Enabled by the Automatic Snap Band Welding Machine

The development of the Automatic Snap Band Welding Machine was not driven by automation alone.

It was driven by a fundamental engineering question:

How should a snap band be joined if long-term sealing reliability truly matters?

By replacing mechanical fastening with continuous metallurgical bonding, this system establishes a new reference point for snap band manufacturing in industrial filtration.

It is not an incremental improvement.

It is a structural redefinition.

FAQ: Why Snap Band Welding Matters in Industrial Filtration

Q: Why are snap bands important in industrial filtration systems?

A: Snap bands are not simple accessories; they are critical sealing, positioning, and structural components. In filter bags, they help maintain stable compression between the bag and the tube sheet. In flexible connectors, ducting systems, and sealing rings, they help provide secure fitting, airtight sealing, and long-term structural stability. A well-formed snap band reduces leakage and supports reliable performance under continuous operating conditions.

Q: Is snap band reliability only determined by material selection?

A: No. Material selection is important, but snap band reliability also depends on structural continuity, fatigue resistance, and long-term geometric stability under real operating conditions.

Q: What are the limitations of traditional riveted snap bands?

A: Traditional riveted snap bands rely on localized mechanical fastening. Under pulse-jet cleaning vibration, radial compression, thermal expansion and contraction, and repeated bag installation or removal, the riveted joint area may become a potential weak point over time.

Q: How does snap band welding improve joint performance?

A: Snap band welding replaces localized mechanical riveting with continuous metallurgical bonding. This creates a more integrated metal structure, helping improve joint durability, circumferential continuity, sealing reliability, and resistance to long-term fatigue.

Q: How does welded snap band joining help reduce dust leakage?

A: A continuous welded joint helps maintain a more stable circular shape and consistent radial compression. This reduces the risk of local deformation or loosening at the joint area, helping improve sealing performance and reduce potential dust leakage during long-term operation.

Q: What makes KABORY’s Automatic Snap Band Welding Machine different?

A: KABORY’s Automatic Snap Band Welding Machine is designed for stainless steel snap band production used in filter bags, flexible connectors, and industrial sealing rings.

Q: Where can welded snap bands be used?

A: Welded snap bands are suitable for filter bags, flexible connectors, industrial ducting, pneumatic conveying systems, hose and clamp systems, and other industrial sealing applications where airtight performance and mechanical durability are required.