Cellular Phone Cover Assembly Machine
This machine assembles cellular phone windows onto self-adhesive gaskets and applies a protective label. The gaskets are supplied 5 up on sheets of backing paper and are loaded by the operator onto fixtures on an over and under servo-driven indexing conveyor. The windows are supplied in vacuum formed trays and are loaded by the operator into an automatic tray progression system. Empty trays are discharged into a pile at the end of the machine. The indexing conveyor makes 4 short indexes between gaskets and then 1 long index to get to the next sheet.
The windows are loaded onto the gaskets by a 4 axis servo controlled parts placer. Even though the accuracy of the indexing conveyor is pretty good, the position of the gaskets on the paper and the position of the windows in the tray is not repeatable enough to achieve the window placement. Each window is visually located with a CCD camera connected to a PPT vision system prior to being picked up and the gasket location is also verified visually before the window is put down. Once the windows are loaded onto the gaskets, they are seated with an air cylinder press and a protective label is applied by a standard labeling machine.
Bad assemblies are identified with an ink mark. All strips of release paper, gaskets and windows are unloaded onto an output conveyor that takes them to the next operation.