Insert Molding

Integrating Strength, Precision, and Functionality into Every Molded Part

Insert Molding with Topmetry

Insert molding is a precision injection molding process that encapsulates metal, plastic, or ceramic components—called inserts—within a molded plastic part. These inserts are placed into a mold cavity before plastic is injected, forming a tight mechanical or chemical bond between the materials.

This method enhances the structural integrity, electrical conductivity, and wear resistance of parts without requiring post-molding assembly. Common insert types include threaded studs, electrical contacts, and structural reinforcements—especially useful in automotive, medical, and industrial products that demand high performance and long life.

At Topmetry, we specialize in custom insert molding for both prototyping and production. Our team ensures proper insert placement, precise molding conditions, and reliable bonding across a wide range of materials and designs—so your parts are built stronger, faster, and smarter.

Topmetry Insert Molding Capabilities

We combine advanced molding techniques with engineering expertise to deliver complex insert-molded components with tight tolerances and superior performance. Whether you need metal-to-plastic integration or specialized insert geometries, our process ensures optimal adhesion, alignment, and repeatability.
Capability Details
Maximum Part Size

800 × 1000 × 400 mm (31.50 × 39.37 × 15.75 in)

Minimum Part Size

20 × 20 × 20 mm (0.79 × 0.79 × 0.79 in)

Substrate Wall Thickness

0.5 – 3 mm (0.02 – 0.12 in)

Tolerance

± 0.025 mm (± 0.00098 in)

Insert Types

Compatible with male/female threads, pins, contacts, and more

Mold Validation

T0, T1, T2 sample runs available prior to production

Inspection & Certifications

ISO 9001, ISO 13485, First Article Inspection

Lead Time

Mold to sample: 15–45 business days

FAQs

FAQs About Insert Molding

What is insert molding best suited for?
It’s ideal for embedding metal parts, electronics, or threaded inserts into plastic components in a single molding cycle.
We can mold around brass, steel, stainless steel, or pre-molded plastic inserts, as well as delicate electronic parts.
Yes — the insert provides reinforcement and increases durability, while reducing the need for post-molding assembly.
We can source inserts for you or use customer-supplied components, depending on your requirements.
Small runs can be ready in 2–3 weeks, while large production orders typically take 4–6 weeks.

Request a Quote for Insert Molding

Durable, reliable plastic parts with embedded inserts. Share your design today and get a fast quote