Automatic Snap Band Welding Machine – High-Speed Rivet-Free Welding for Stainless Steel Bands and Sealing Rings

World’s First Automatic Snap Band Welding Machine

Rivet-Free, High-Strength Metallurgical Joint for Stainless Steel Snap Bands & Sealing Rings

Background of Automatic snap band welding machine 

In industrial dust filtration and flexible connector sealing systems, snap bands must maintain consistent sealing performance under:

• Pulse-jet cleaning vibration

• Thermal cycling

• Continuous compression loads

• Long-duration operation without loosening

Connection fatigue stability and geometric continuity directly determine reliability and maintenance intervals.

KABORY developed the world’s first automated  Snap Band Welding Machine, where the band ends are joined through Four-Point Controlled Fusion Welding, forming a continuous metallurgical bond instead of a mechanical fastening interface.

✅ No rivets
✅ No holes
✅ Smooth, continuous sealing interface
✅ Stable under high-temperature & long-cycle operation

Structural Evolution between snap band welding and Snap Band Rivetting 

Riveted snap band structures remain reliable in standard operating environments.

As filtration systems move toward:

• Higher temperature operation

• Higher pulse cleaning frequency

• Longer maintenance intervals

• Continuous multi-shift duty cycles

The connection structure requires greater fatigue resistance and load stability.

Automatic Snap Band Welding Mahcine as the next-generation structural solution for long-duty, high-temperature, and high-frequency applications.

✅ Riveting → Standard duty
✅ Welding → Advanced duty / high-cycle / high-temp

The welding-based snap band joint is therefore positioned as the next-generation structural solution — expanding the operating window to more demanding environments and reducing long-term total cost of ownership.

✅ Riveting = proven for standard duty
✅ Welding = next-generation structure for high-temperature, long-cycle industrial operation

Snap Band Welding Machine for Filter Bag Production

Why Upgrade from Mechanical Fastening to Fusion-Based Jointing

Mechanical fastening relies on drilled holes and discrete contact points, resulting in localized load paths.
Under pulse cleaning vibration and thermal cycling, these localized stress regions can experience progressive movement over time, requiring periodic adjustment or replacement to maintain sealing stability.

The welding-based joint forms a continuous metallurgical structure, providing:

• Uniform load distribution with no stress concentration

• Stable joint geometry across long-duration operation

• Low-profile sealing surface with reduced fabric-side rubbing

• No rivets or fastening components that require tightening or replacement

This makes the welded structure particularly advantageous for high-temperature, corrosive, and long-maintenance-cycle filtration environments.

Real Tensile Strength Test Comparison

Tensile Strength Test – 0.40 mm SUS301 (same hardness)

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

Engineering Failure Mode Comparison

 

Fabric-Side Interface & Contact Geometry

Riveting may create two raised fastening points and, depending on pressing conditions, micro-burrs or high points around the hole area.
During pulse cleaning and flexing cycles, this results in higher local contact pressure at the fabric interface — particularly critical for:

Suitable Filter Bag Media Types

• Thin needlefelts

• P84 polyimide

• Fiberglass filter media (brittle)

Welding provides a smooth, continuous, low-profile contact surface, reducing long-term fabric wear.

Benefits to Filter Bag Manufacturers
✅ Stable sealing fit during installation and operation
✅Reduced fabric abrasion at the cuff
✅Longer service life in high-frequency pulse systems

Engineering Comparison: Mechanical Fastening vs Metallurgical Joint

Aspect	Riveted Joint	Welded Metallurgical Joint
Load Path	Localized at hole	Continuous through metal
Stress Distribution	Stress concentration at hole	No stress concentration
Fatigue Stability	May loosen over time	Stable under cyclic load
Fabric Contact	Local high points	Smooth, low-profile interface
Maintenance	Periodic inspection / tightening	No fastener maintenance

Recommended Connection by Application Level

Operating Environment	Recommended Structure	Rationale
≤120°C Standard duty	Riveting acceptable	Conventional load profile
≤160°C Mid-temp systems	Either	Welding provides additional fatigue margin
Aramid / PPS / P84 high-temp media	Welding recommended	Stable under thermal + pulse cycling
Fiberglass filter bags	Welding required	Avoids stress concentration on brittle fibers
Incineration / FGD / corrosive gas	Welding preferred	Maintains sealing continuity over long cycles
Long maintenance interval facilities	Welding preferred	Reduced re-adjustment and downtime

Production Workflow

1. Automatic Coil Feeding

2. Fixed-Length Cutting

3. Snap Band Forming

4. Four-Point Controlled Fusion Welding

5. Output Counting & Stacking

✅ 8–10 pcs/min
✅ ~2,800 pcs per 8-hour shift
✅ One operator can manage multiple lines

 

Technical Specifications

Parameter	Specification
Diameter Range	90–220 mm / 90–300 mm (customizable)
Steel Band Thickness	0.20–0.45 mm
Steel Band Width	25–30 mm
Edge Alignment Accuracy	±0.05 mm
Joint Structure	Four-Point Controlled Fusion Welding
Output Capacity	8–10 pcs/min
Power	380–480 V, Three-phase
Air Supply	0.5–0.7 MPa
Control System	PLC Automatic Control
Welding Technology	Four-Point Controlled Fusion Welding
Control System	PLC-based automatic control
Operation Mode	Automatic feeding, positioning, cutting, and welding
Material Compatibility	Stainless steel snap bands
Safety Features	Emergency stop, protective housing
Control System	PLC Automatic Control

 

Your Benefits

✅ Rivet-Free: Eliminates consumables and tooling replacement
✅ No Holes: No stress concentration → stronger structural integrity
✅ Clean Sealing Surface: No burrs, no edge scratches, fabric-friendly
✅ Stable for High-Temperature / Pulse-Cleaning Duty Cycles
✅ Universal Fit: Filter bags, flexible connectors, sealing rings
✅ High Output: 8–10 pcs/min (~2,800 pcs/shift)
✅ One Operator Can Manage Multiple Production Lines