ISO Certified Custom Injection Molding, Designed & Molded in the USA
End supply chain delays with a turnkey, ISO 9001:2015 certified injection molder. In-house design, prototyping, and production — with tooling built by trusted partners and managed under one Kentucky roof, concept to consumer, made in the USA.
One partner, from first sketch to final shipment
For more than 40 years, Pioneer Plastics has handled the full complexity of custom injection molding. We simplify your part, design the tool and have it built by trusted partners, then maintain it and run production on 23 modern presses in-house, and ship finished goods straight to you or your customers — no international trade or shipping concerns.
How We Work
Three steps, one accountable partner — concept to consumer.
We Design It
We refine your concept for manufacturability, always designing with the end use and assembly in mind to keep parts simple and reliable.
We Mold It
In-house rapid prototyping and mold design, plus tooling built by trusted partners, feed 23 presses (75–1,200 ton) to turn your project from concept into reality.
We Ship It
From our centrally located facility we ship finished product directly to you, your consumers, or your retail partners — fast.
A relationship-driven molder you can keep for decades
Many of our clients have been with us 20, 30, even 40 years. We place a high demand on client retention and go beyond what's required because we know how valuable a trusted molder is.
All of it runs on an ISO 9001:2015 certified quality management system — documented processes, traceable materials, and controlled inspection on every run, not just the ones being watched.
In-house tool & die
Our own shop, Collins Engineering, repairs, modifies, and maintains your tools on-site; new molds are built by trusted partners to our spec.
Turnkey accountability
Design, tooling, molding, QC, and distribution from a single source — one point of contact.
Made in the USA
Every part is molded and finished in our U.S. facility, keeping production close, accountable, and quality-controlled.
Preventive maintenance
Every mold is on a PM schedule between runs, preventing unplanned downtime and delays.
Is injection molding right for your project?
Tooling typically runs $10,000–$250,000 depending on size and complexity, so molding shines at higher volumes. If you need roughly 1,000 units or fewer, ask us about 3D printing or low-volume options instead — we will point you to the most cost-effective path.
★★★★★"We needed a custom, highly unique new device — but more importantly, a supplier partner that could be counted on to deliver an incredibly high impact project on an aggressive timeline. The supplier-partner submitted what was asked, but also took it a step further by providing a 2nd solution that cast their own unique design spin. This design set them apart from the group and, with their value-add on cost and timing, made it an easy decision on who to partner with. They say it's easy to make things different but really hard to make them better. I can say today that this year's supplier of the year winner helped make us better for many years to come."






Keep learning: injection molding insights
Injection Molding Questions, Answered
Answers reviewed by the Pioneer Plastics engineering team — 175+ combined years of molding, tooling, and part-design experience. Last updated August 2026.
Explore Our Full Capabilities
Custom Plastic Parts
Let's turn your custom plastic part concept into reality. With 40+ years of part and mold…
See our custom plastic parts →Tool Development & Management
Our own tool and die shop, Collins Engineering, repairs, modifies, and maintains your molds…
Learn about tool development →3D Printing
Bring product ideas to life quickly and economically. Prototype a design before investing in…
Try 3D printing & prototyping →Get a Behind-the-Scenes Look at Pioneer Plastics
Curious about our advanced capabilities and commitment to quality? Schedule a virtual or in-person tour of our manufacturing facility to see our process and people in action — and experience firsthand how we turn ideas into market-ready parts.
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