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Adhesive bonding technology

Gluing is the joining technology of the 21st century

The sustainable joining method of adhesive bonding has long been the state of the art. With this method, it is possible to combine different substrates with each other permanently or for a “programmable” period of time.

Meanwhile, we have also begun using adhesives that can create liquid-tight and gas-tight bonds in human organs. These are currently being applied in eye surgery, in plastic surgery and, last but not least, in transplantation. Adhesive bonding has numerous advantages over traditional joining technologies: It allows, for instance, materials with different thermal expansion coefficients to be easily joined with an even distribution of tension and forces. In addition, it is easily possible to create liquid-tight and gas-tight connections, as well as vibration-absorbing and rigidity-enhancing junctions. It takes comprehensive expertise to apply these ideal properties, which the specialists at WILD have acquired over many years. Such expertise covers knowledge on the structural design of the joining geometry, the choice of adhesive, the suitable surface treatment, and the exact dosage.

 

A solid bond

This expertise already comes into play during the product development stage, thus ensuring that no complicated interventions, e.g. in product design, will be needed later during implementation. Our customers benefit from the fact that WILD examines beforehand which connections are suitable for adhesive bonding and assesses the advantages that can be gained, e.g. a more lightweight construction or shorter assembly times. Industry 4.0 methods are now being introduced to adhesive bonding, too: WILD is currently operating a gluing robot in its assembly, which applies various adhesive bonding techniques precisely, repeatedly, and always in the exact same dosage. This robot is used, for instance, to glue together the components of a 3D laser scanner assembly. The exact dosage and positioning of the light-curable adhesive and of the component to be glued are decisive factors. Moreover, the robot guarantees an ideal bonding quality as a result of the exact and process-stable duration of exposure to the light source during the curing process.

 

The capabilities of adhesive bonding technology in practice

A project in which the decision to use adhesive bonding for the casing parts was already taken during the development phase involved an autoclavable instrument for navigation during surgery, which is used, among others, to carry out neurosurgical interventions. This helped achieve the balancing act between tool and manufacturing costs at small production quantities. At the same time, it was possible to guarantee tightness for several sterilisation cycles and ensure the precise positioning of the integrated metallic sensor tip within the required tolerances.

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