Union Tool and Mold Company - Injection Molding Tooling, Die... Since 1956, Union Tool and Mold Company have provided high quality mold building and molding services to our... customers. It is our over 56 years of commitment to quality and customer service that has enabled us to grow and develop long term relationships with our clients. Union Tool and Mold... in Maplewood, NJ in 1984. In 1998, we completed a 10,000 square foot addition to the building. This facility houses the mold making operation as well as the plastic molding operation...