Advanced Interior Assembly Using Ultrasonic MM-Welding®

Ultrasonic MM-Welding®: The Future of Interior Solutions

For decades, interior component assembly relied on time-consuming, multi-step joining methods: bolting, riveting, welding, soldering, and brazing. While these techniques remain common, today’s manufacturing demands more: faster production, lighter materials, smarter processes, and reduced costs. Enter MM-Welding®, game-changing ultrasonic technology that’s redefining how interior solutions are engineered and assembled.

Why Conventional Fastening No Longer Fits Today’s Interiors

Interior applications, especially in automotive, aerospace, and consumer goods, are increasingly using lightweight, multi-material assemblies. Traditional fastening methods often struggle in these environments due to:

• Manual complexity and long cycle times
• Inconsistent quality and human error
• Material damage or misalignment
• High cost of labor and tooling
• Limited compatibility with dissimilar or porous materials

As products become more complex, compact, and material-diverse, a single-step, AI-driven, clean joining method like MM-Welding® offers unmatched performance and scalability.

Key Advantages

• Ultrasonic welding of dissimilar materials
• No adhesives, screws, or pre-holes required
• Lower cost and shorter cycle times
• Error-free and repeatable results
• Fully digitized and Industry 4.0 ready

Applications in Interior Solutions: EPP Bonding

One of the most exciting applications of MM-Welding® is in bonding Expanded Polypropylene (EPP)—a material widely used in car interiors, trunk liners, acoustic panels, and floor insulation.

Why EPP?

• Lightweight and impact-resistant
• 100% recyclable and water-resistant
• Excellent thermal and sound insulation
• Strong strength-to-weight ratio

Traditional bonding of EPP requires adhesives, pressure fittings, and multiple fasteners, resulting in longer assembly times, higher material costs, and lower reliability. MM-Welding® replaces this with one efficient, clean, and fully repeatable ultrasonic process.

Inside the MM-Welding® System Lineup

Bossard’s MM-Welding® technology is available in several machine configurations to meet different production needs:

Table-Top Machine

• Compact, manually controlled
• Ideal for low-volume or prototyping applications
• Operated via hand or foot switch

X-Y-Portal Machine

• Automated bonding at multiple points
• Great for medium-volume production
• Programmable clamping and nesting

Dedicated Machine

• High-volume, low-cycle bonding
• Supports complex geometries and part shapes
• Customizable with turntables and multi-angle operation

Robotic Machine

• Full integration with production lines
• High throughput and minimal human intervention
• Real-time production data, minimal adjustments

Each machine is designed for flexibility, durability, and smart manufacturing, leveraging AI, real-time data, and digital process control to create high-performance interior assemblies faster and with fewer errors.

Why Bossard?

Bossard continues to push the limits of what's possible in fastening and joining solutions. As a recognized global leader in engineering support, logistics systems, and fastening technologies, Bossard brings over 180 years of experience to solving the toughest manufacturing challenges. The MM-Welding® System is another milestone in Bossard’s mission to deliver smarter, faster, and more sustainable solutions to today’s manufacturers.