MAPLE PLAIN, Minn.--(BUSINESS WIRE)--Digital manufacturing company, Proto Labs, Inc. (NYSE:PRLB), was named Manufacturer of the Year, Small Enterprise, at the 2015 Manufacturing Leadership Awards ceremony held recently in Carlsbad, Calif. The 11th-annual event—produced by corporate growth consulting firm Frost & Sullivan and its Manufacturing Leadership Council—celebrates industry leaders and companies that are pushing global manufacturing forward. Alongside Proto Labs, Dow Chemical receive