aluminium composite panel for signage Joining method
(1) Rivet and bolt/nut
We often use rivets, bolts/nuts and tapping screws for joining between Aluloyal aluminium composite panel for signage and other material like aluminum extrusions. For rivets, use aluminum blind rivets. We can do riveting work from one direction as shown in Fig. 3-20. For screws, use bolts/nuts and tapping screws made of aluminum or stainless steel.
Strength of joining hole
A joining hole of 4mm in diameter with stands approx.
500-800 N(50-80kgf) per point depending on Aluloyal aluminium composite panel for signage thickness. The strength of the joining point depends on the position of the hole. The joining hole located near the pane ledge will easily tear and will not show a sufficient strength.
According to our test, the distance from the pane ledge to the hole center (e) should be larger than twice the hole-diameter (D) for sufficient strength, which is expressed with the equation 2D. In actual assembly work, we have to choose the position of the joining holes based on this idea.
Refer to"Appendix6: Strength of joining hole" in section 4 for details.
In the installation of interior, countersunk rivets and screws will be used more often than round-headed ones. The strength may lessen with countersunk rivets and screws.
Prevention from galvanic corrosion
If Aluloyal aluminium composite panel for signage contacts a dissimilar metal in a humid atmosphere, the galvanic (electrolytic) corrosion may accelerate the corrosion of aluminum skin. To prevent this, the contact surface of the dissimilar metal like's steel should have a paint coating thicker than 25 microns, galvanized coating or electric insulation, before fixing Aluloyal panel onto the metal surface.
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