The Tog-L-Loc clinching method uses punch-and-die tooling to draw the metals into a pocket and then forms them into a round, leakproof interlock. The sides of the die expand as the metals are interlocked to form a kind of rivet head, then the punch is withdrawn and the joined parts are removed from the die. The quick process can be performed on prepainted steel and aluminum for the manufacture of appliances and other consumer products. The punch-and-die tooling uses relatively low force, and it does not use heat to clinch the metals into the interlocked shape.
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