3D Printed Vacuum Blocks are a common item used in factory automation for various applications like:
Plugging irregularly shaped holes in assemblies that have been joined with plastic welding, assembled with a seal, or metal welded can be tricky. The 3D Printed vacuum block has almost unlimted design freedome to be any shape, it is used to plug a hole in the assembly so it can be pressurized and the part checked for leaks:
Precision sticker application can be done with 3D Printed vacuum blocks as well. The base of the block is printed with Nylon 12 to give the parts structure but the top is skinned with 50A Rubber that is full of vacuum holes so the sticker can be held in place with a vacuum while the machine is positioning it for application. The sticker is then pressed onto its final location, the 50A rubber can compress and this allows the sticker to be fully wet out on the part: