Injection Molding, Product Development, and Secondary Operations (Product Assembly, Pad Printing, and Hot Stamping). Welcome to BMI Injection Molding & Assembly. Located in Chesterfield, Michigan, BMI is an integrated, diversified manufacturing support company. ISO/TS 16949:2009 certified company with a primary focus on Tier 1 and 2 automotive suppliers. Since 1988, we have supported OEM manufacturing processes that impact core competencies and profitability. We make your non-core activities our core business, enhancing both precision and competency - cost-effective outsourcing at its finest. BMI provides engineering support for product development and manufacture from product concept and prototype, through production and product distribution.