Royal Plastics Inc

About Royal Plastics Inc

Royal Plastics, Inc. operates from a 46,000-square-foot facility in Brookings, South Dakota. The company was started in 1978 by Arlen and Jane Rosvold and remains family-owned; today it is held by their children, Michael Peterson and Renee Novak, with the next generation represented by Thomas Peterson as assistant vice president and production manager. The business moved into its current plant in March 1999. As a custom injection molder of thermoplastics, Royal Plastics runs 15 molding machines ranging from 50 to 300 tons, six of which are all-electric. The shop produces parts from small gram weights up to two pounds, maintaining over 1,300 active part numbers for more than 200 customers across the United States and Canada. A full-service tool room handles mold maintenance, new mold construction, and engineering changes, while an in-house engineering team uses AutoCAD and SolidWorks for mold and part design. Prototyping is supported by a Fortus 250mc 3D printer (10×10×12 in. build envelope, ABSplus-P430 material, ±0.0095 in. accuracy). Quality control relies on a Keyence IM-6120 image dimension system (±2 µm accuracy) and a Mitutoyo QM-Height 600 gauge, backed by a dedicated maintenance program. The company serves the window and door industry—where it has 40 years of experience—and the after-market automotive sector, among other markets. Its customer base spans OEMs and tier suppliers in both the U.S. and Canada. Royal Plastics emphasizes a problem-solving culture (“we like problems”) and cites four guiding principles: putting the customer first, imposing no resin restrictions, maintaining dependable quality, and reducing costs. These differentiators are reinforced by on-site mold storage, stocking programs, and design assistance from concept through production.

Equipment

• 15 injection molding machines (50–300 ton, 6 all-electric)
• Fortus 250mc 3D printer
• Keyence IM-6120 Image Dimension Measurement System
• Mitutoyo QM-Height 600 Gauge
• AutoCAD and SolidWorks (software)

Company details

Location

Brookings, South Dakota

Company type

Contract manufacturer / job shop

Founded

1978

Ownership

Family-owned

Tolerances

±0.0095 in (3D printed prototypes); ±2 µm (Keyence inspection)

Listed under

• Injection Molding in South Dakota
• Plastics & Packaging Manufacturers in South Dakota

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