Top 18 Injection Molding Manufacturers in Indiana 2026

American Plastic Molding Corporation

Scottsburg, Indiana120 employees

American Plastic Molding Corporation (APM) is based in Scottsburg, Indiana. It began as a basic injection molder and over five decades expanded into a full-service manufacturing and product development organization.

Global Plastics

Indianapolis, Indiana

Global Plastics began operations in 1992 in Indianapolis, Indiana, starting with a single 40-ton Nissei injection molding machine. The company has grown from those humble beginnings into a multi-facility operation served by a 250,000-square-foot warehousing and distribution center.

Hoosier Custom Plastics

Ober, Indiana

The company focuses on tight-tolerance plastic insert molding and injection molding, including over molding and insert molding with aluminum inserts, plastic fasteners, threaded brass, and knurled inserts. It also provides value-added light assembly services such as sonic welding, plastic joining, O-ring installation, and manual box-build assembly.

Infinity Molding & Assembly

Mt Vernon, Indiana

Infinity Molding & Assembly, Inc. has operated from Mt.

Metro Plastics Technologies LLC

Noblesville, Indiana

Metro Plastics Technologies LLC, founded in 1975, operates from Noblesville, Indiana. The company began as a plastic injection molding business and has grown into a custom molder with a newly constructed, custom-built facility in the Midwest.

20/20 Custom Molded Plastics

Bluffton, Indiana

20/20 Custom Molded Plastics operates from its headquarters in Bluffton, Indiana, with additional facilities in Holiday City, Ohio, and Covington, Georgia. The company's founding year and ownership structure are not publicly disclosed, nor are its founders named in available materials.

DeKALB Molded Plastics | Structural Foam Molding

Butler, Indiana

Based in Butler, Indiana, DeKALB Molded Plastics has operated for over three decades as a custom structural foam molder. DeKALB specializes in large, multi-nozzle plastic products using structural foam molding and gas assist molding, with press capacities ranging from 300 to 750 tons.

Indiana Rubber & Plastic, LLC

Indianapolis, Indiana

Indiana Rubber & Plastic, LLC was founded in 1936 in Indianapolis, Indiana, and has operated continuously for three generations. The company began as a specialist in custom molded plastics and rubber and has expanded its capabilities while remaining focused on its core expertise.

Molding Products LLC was founded in 1978 in South Bend, Indiana, as an operating business of IP Corporation. The company began by supplying sheet molding composites (SMC) to the growing compression molding industry and remains focused on custom-formulated molding compounds for diverse applications.

PMC SMART Solutions traces its roots to 1929, when two families founded Plastic Moldings Company in Cincinnati, Ohio, during the Great Depression. The business relocated to Shelbyville, Indiana, and remains privately owned by the founding family.