MM-Welding® – Smart Joining of Lightweight Materials
MM-Welding® technology is an innovative fastening technique using ultrasonic energy to create a frictional positive connection in porous materials, sheet structures, sandwich materials, injection-moulded and pressure mouldings. To achieve this, rod or collar-shaped thermoplastic elements are used to fasten components.
Features:
Significantly stronger connections than with many other fastening methods
Can be used without pre-setting to take up tolerance
Clean processing, as no additional materials or pre-treatment of surfaces is required, and no waste is produced
Statistical check on the process, which guarantees the quality of the individual fastenings
The technology is used in a wide range of industrial processes and in other industries, such as medicine and the furniture industry
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LiteWWeight® Pin
Applications
Features
This is a family of fasteners with easy one-sided access assembly process designed to realize fast and strong fixation on sandwich structures with internal honeycomb or similar patterns.
High strength due to intensive integration in the fibre matrix
Simple and more complex 3-D geometries (due to direction of motion of the fastening element only being in the z-direction)
Ideal integration into textile structures possible
LiteWWeight® Lotus Abalone
Applications
Features
MM-Welding® LiteWWeight® Lotus Abalone accelerates the mounting of the male clip component considerably. No punching/cutting required and eliminate the need for connecting two separate components. This clip can also be attached to the floor/carpet after the sound insolation is attached to the backside of the floor/carpet.
Reduced costs due to the fast process and less parts to manipulate
Two-piece clip into one piece
No pre hole need
Eliminate risk of hole being too large and part moving
Eliminate risk of floor mat moving
Remove tolerance necessary for holes
No noise from underbody due to space between hole and part
Eliminate risk of water/moisture coming up through carpet from hole
Access from only one side needed
LiteWWeight® zEPP
Applications
Features
LiteWWeight® zEPP is a fast and efficient fastening technology for all expanded polypropylene (EPP) materials based on the innovative MM-Welding® process.
Standard solutions for a wide range of EPP densities
Strong and reliable screw-on points in EPP, even at critical locations
Suitable for demanding mobility and automotive applications
For EPP components from logistics and transport
For functionalizing HVAC and NVH constructions made of EPP and similar materials
Very fast cycle times (~1 second)
High pull-out force due to optimal anchoring with the EPP material
Very high torque transmission possible due to MM-Welding® specific "Anti-Turning" geometry
Full integration into the substrate
Placement directly at the edge of the material possible
Low overall height of the fastener increases design freedom
Applicable for all density ranges
No pre-drilling necessary
LiteWWeight® Double Pin
Applications
Features
This fastener is designed to realize fast and strong fixation that can be designed for plastic direct screws, with a metric internal thread or even with a through-hole. The fastener consists of a sleeve, as slide and optionally a metallic insert, which can be selected according to the application.
For connection into lightweight sandwich panels made of aramid, polypropylene, and more
Nomex honeycomb panels for aerospace applications: In aerospace industry, certification is crucial for the acceptance of each part. The LiteWWeight® Double Pin includes standard materials for aerospace, and is an ideal replacement for gluing where material content complicates the certification process.
Polypropylene honeycomb panels: Internal cavities of polypropylene honeycomb panels make it difficult to install standard connectors such as screws as they don’t have a structure to hold on to. The LiteWWeight Double Pin® is designed to attach strongly to this type of material, and if necessary allows the inclusion of a metallic thread.
High versatility: can contain a clearance hole, a threaded hole or a metallic insert (M3 to M8)
Quick installation process time of < 0.7 seconds
High strength due to creating form lock to top-layer and conventional weld-connection to bottom-layer
Full integration in substrate possible
Pull-out forces of higher around ~ 2000 N can be achieved through deep integration into HCB material
InWWerse® Fastener
Applications
Features
Based on the innovative MM-Welding® process, the InWWerse® Fastener Technology takes the industry proven advantages and features to another exciting field of applications. The MM-Welding® engineers have developed a novel fastening system which allows to precisely establish an immediately loadable connection point onto thermoplastic substrates.
For creating connection points on thin polymer parts
Ideal for thermoplastic polymers with or without reinforcement
Discrete connections possible. Neither marks nor fastener appearance on distal side visible
Suitable for decorative and structural parts within automotive, aviation or rail industry
Very fast processing time of only 1 second
Suitable also for low wall-thicknesses
No pre-hole or through-hole required
Strong form locking due to innovative crater shaped design
InWWerse® Disc
Applications
Features
Fastening solution for joining dissimilar thermoplastic as well as very thin materials (< 2.5 mm) without creating marks.
By using the unique MultiMaterial-Welding® ultrasonic technology it provides a very quick and reliable processing, superior to adhesive bonding in many applications.
Bonding thin-walled polymer components
Ideal for thermoplastic polymers with or without reinforcement
Discrete connections possible. Neither marks nor fastener appearance on distal side visible
Suitable for decorative and structural parts within automotive, aviation or rail industry
Use for conventional, non-weldable polymer combinations
Thin-walled polymer parts without affecting the opposite surface
Very short cycle times
MM-Welding® technology is based on the patented WoodWelding® technology of WoodWelding SA and is licensed by MultiMaterial-Welding AG, Switzerland.
MM-Welding® is using the WoodWelding® technology in the transportation industry only.
Matthias Mitter
Head of Product Management / Category Manager Welding
Phone +43 732 257700 34
Fastening solutions for composite and plastic materials
Composite and plastics are go-to materials in many applications. In this white paper, you will learn about available technologies and different options for creating solutions.
