Tooling. Molding. Manufacturing.

One partner for smarter, more seamless plastics manufacturing.

From Fortune 400 powerhouses to precision-driven niche manufacturers, Mantz Automation helps bring complex plastic products from concept to production right from our state-of-the-art facility in Hartford, Wisconsin. Automotive, medical, oil & gas, consumer products—if it requires ultimate precision, Mantz delivers.

Your Partner For Complete Manufacturing Solutions.

Tool & Die Making

Our toolmakers are some of the best in industry, bringing experience ranging from apprentices to 25+ years in the industry.

We take a team-based approach to tool building, combining the expertise of two dedicated toolmaking teams. Each team brings its own unique strengths, capabilities, and experience, allowing us to match the right talent and resources to your specific tooling requirements.

Contract Machining

Our contract machining capabilities allow us to apply our equipment and expertise to custom machining projects beyond traditional mold construction.

From individual components to more complex machining projects, our team can review your requirements and help determine the right manufacturing approach.

Plastic Injection Molding

We offer flexible molding solutions from initial sampling and prototyping through short-run production and overflow molding. With experienced press technicians, secondary operations, assembly, packaging, and scalable production capacity, Mantz helps keep your manufacturing moving.

One-Stop-Shop

From mold design and build to injection molding, inspection, and production, we bring every step of the process together under one roof.


Our advanced manufacturing facility brings modern equipment, precision technology, and skilled expertise together to deliver quality products with efficiency and consistency.

State Of The Art Facility


Precision & Quality

We combine advanced technology, experienced craftsmanship, and rigorous quality standards to deliver reliable, consistent results.

Mantz Automation

We bring products from concept to production — combining mold building, injection molding, inspection and precision manufacturing into one seamless process.