Last week, I posted an article about “proper joint-design for medical devices” that you can find here. I will today share more about how you can select the right joining method with a drawing.
Part size, flexibility, bond line geometries or material combination limit some of the assembly processes options. For example, it is difficult to use mechanical fasteners on tiny components or flexible materials cannot be joined by Ultrasonic Welding, or the majority of materials – including many newer substrates like TPE and TPU – show limitations when attempting solvent welding. Overall adhesives show the broadest versatility when assembling medical devices.
Two dimensions will need to be considered when looking at adhesive bonding versus solvent welding. I have drawn the different design options you can consider and materials:
Design Variations: