RACINE - Claiming it can compete globally from its manufacturing base in southeastern Wisconsin, where it invented the first garbage disposal 90 years ago, InSinkErator on Thursday announced a $63 million raft of new investments that include new headquarters and research labs. "We can be competitive here. We do it every day," said InSinkErator President Chad Severson. China, Britain, Australia and New Zealand are among the growth markets that InSinkErator expects to drive demand for made-in-Wisconsin disposals. InSinkErator, owned by St. Louis-based Emerson Electric Co., will build a new $34 million headquarters and lab facility in Mount Pleasant, which is 5 miles…