Insert Molding

Insert Molding Services with Built-In Reliability

Since 1977, Sussex IM has provided dependable insert molding services that bring strength, precision, and efficiency to complex molded parts. From threaded brass inserts to embedded electronics, we’ve helped customers across industries produce integrated assemblies that last.

Our process combines plastic injection molding with metal, plastic, or electronic inserts, resulting in a single, durable component that reduces secondary operations and enhances part performance. Early experience with brass inserts molded into PVC pump housings laid the foundation for what has become a core capability at Sussex IM.

Today, we engineer every detail in-house, from tooling to robotics, ensuring accurate insert placement, optimized cycle times, and consistent results.

What Is Insert Molding?

Insert molding is the process of placing a pre-formed insert into the mold cavity before thermoplastic is injected. The plastic forms around or over the insert, creating a unified part without additional fasteners or adhesives.

Sussex IM’s team of engineers and automation experts designs and builds custom EOAT (End-of-Arm Tooling) to place inserts with precision, minimizing risk of damage and improving part quality.

Let’s Talk About Your Project

Need help with an insert molding application? Sussex IM is ready to support your next project with proven processes and smart, hands-on engineering.