the integration of two separate manufacturing processes involving joining two pieces of metal using a clinching or tog - l - loc ™ type of connection , while also injecting a molten material around the two pieces of metal to create the desired part . a process for creating the desired part made of both plastic and metal includes the steps of providing a first metal component , a second metal component , inserting the first metal component into a mold , and inserting the second metal component into the mold . at least one connection point is used for connecting the first metal component to the second metal component while the metal components are located in the mold . molten material , such as a thermoplastic , is injected into the mold around the first metal component and the second metal component , forming the desired part using the first metal component , the second metal component , and the hardened molten material .