• Injection Molder &

    Mold Maker Since 1910

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Insert Molding & Overmolding

Insert Molding and Overmolding

Insert Molding and Overmolding

Insert molding involves molding plastic around a core or "insert". Most often, the insert is a metal object, such as a pin, blade, threaded rod, electrical contact, wire, etc. The insert could also be made out of another plastic or composite material—virtually anything that can withstand the heat and pressure of the molding process.

Insert molding is often used to join the insert and plastic together more securely than assembly allows. Moreover, it often eliminates post-molding assembly and saves the additional cost incurred in a secondary operation.

Process of Molding

Klann has decades of experience with insert molding. We typically do this on our vertical clamp molding machines. The vertical machines have an inherent advantage for insert molding—allowing the insert to be easily loaded into the mold, maintain a stable position during the molding cycle, and facilitate unloading the finished part after the molding cycle is complete. The insert is placed in the mold before the mold is closed and before raw material is injected. As the hot liquid plastic fills the mold and flows around the insert, it fills “undercut” features in the insert, such as holes, grooves, or bosses, thus securely captivating the insert into the finished part.

Insert Molding and Overmolding

Samples of Insert Molded Parts

Housing Insert
Housing with Inserts
Spring Loaded Collar
Spring Loaded Collar
Feedthrough Guides
Feedthrough Guides
Cord Clamp Clipper
Cord Clamp Clipper
Humidity Sensor Clip
Humidity Sensor Clip
Sniffer Jr.
Sniffer Jr. (Pad Printed, Insert Molded)
Poultry Knife
Poultry Knife
Handle and Bushing
Handle and Bushing
Derma Blade
DermaBlade
Brush Holder
Brush Holder
Backplate
Backplate
One More
One More