An optimal way to improve manufacturing or assembly productivity is to combine two steps into one. Riveting, bolting or stitch welding are examples of “traditional” joining methods that often require a secondary sealing step. Plexus structural adhesives offer manufacturers the ability to effectively combine the joining and sealing steps.
Below is a case study where a manufacturer changed their assembly process and design from a riveted roof assembly to one made with Plexus structural adhesive. Not only was the assembly with Plexus stronger and more durable, but it also saved significant manufacturing time, reduced the units mass and improved aesthetics.
Plexus adhesives are engineered to be thixotropic (non-sag) while at the same time they spread very easily. Best practice is to ensure even clamp pressure across the bondline.
Here are some tips for clamping:
Generally, sufficient clamping is recommended to ensure the part is in its proper position with an adhesive gap such that you can see a small amount of squeeze out on the edge of the bonded joint. Depending on the visibility of the joint, some end users then simply use an edger of some sort and create a smooth filet on the joint edge, as they do with a traditional sealant, and some simply leave it as is.
Such a process of creating a small squeeze out of adhesive typically helps to ensure enough adhesive is used to join and seal. Select Plexus products are available in white, black and gray if the exposed seam color is important. If the Plexus color is not suitable, many of the Plexus products readily accept paint, although testing will have to be done to guarantee long term paint performance on Plexus. Contact our Technical Service Department for more information.
Plexus adhesives are engineered to be very robust with minimal or no surface preparations.
Testing the exact material being bonded is important to any successful project. Contact our Technical Service Department to discuss about your material and project.