McDonald Plastic Molding, Inc.

About McDonald Plastic Molding, Inc.

McDonald Plastic Molding, Inc. is headquartered in Monroe, Wisconsin, with additional manufacturing facilities in Cuba City and Darlington. The company was formed in January 2021 when A.Y. McDonald combined the operations of S.K. Plastic Molding, Inc. and Non-Metallic Components, Inc. into a single customer-focused organization. The molder runs 69 injection molding machines ranging from 55 to 550 tons, processing engineering thermoplastics such as polypropylene, ABS, acetal, nylon, polycarbonate, polystyrene, PC/ABS, PPO, PSU, PEI, and PEEK. Beyond molding, the company provides engineering upfront development design, tooling design and resurrection, and a full suite of secondary operations including light assembly, pad printing, sonic and spin welding, hot stamping, laser etching, and kitting. Advanced quality systems feature statistical process control, leak testing, pressure decay testing, and automated inspection. McDonald Plastic Molding serves a broad range of sectors: automotive, consumer, electrical, industrial, water filtration, military, recreational vehicle, medical, fluid handling, education, electronics, hardware, home products, marketing products, plumbing, and sporting goods. Customers rely on the firm for both prototype and production volumes, with the ability to manage complex assemblies and decorating in-house. The company differentiates itself through a customer-first philosophy — internally described as "the customer is the boss" — and a willingness to tackle difficult projects that other molders decline, such as reviving old tooling. Its vertical integration of design, tooling, molding, assembly, and decorating under one roof is intended to reduce lead times and ensure accountability from concept to delivery.

Equipment

• 69 injection molding machines (55-550 tons)
• High-speed automation robotics

Company details

Location

Monroe, Wisconsin

Company type

Manufacturer

Founded

2021

Export compliance

ITAR registered

Certifications

IATF, UL, ITAR Registered, ISO

Listed under

• Injection Molding in Wisconsin
• Plastics & Packaging Manufacturers in Wisconsin

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