Rapid Plastics Overmolding & Insert Molding: Insert Mold, Two-shot moulding, Co-injection moulding

Our rapid overmolding prototyping services can product prototypes and on-demand production parts in around 2 weeks. Our in-house engineers use cost efficient aluminum molds allowing us to offer you low-cost tooling options. We plastic over mould and insert mould parts using a wide range of materials from thermoplastics and TPE to liquid silicone and rubber materials. We plastic over mold and insert mold in days.

Our over molding services fall into three categories: Insert Molding, two-shot molding, and co-injection molding.

Let IG8 know about your metal die stamping project requirements today.

Plastic Insert Molding: we mold soft rubber and silicone elastomers such as TPE and TPR into rigid plastics. We separate the hard segment in the insert design in advance. Next, we heat the elastomer sufficiently so a bond can be formed. Finally, we eject or insert the soft elastomer material inside and it bonds to the plastic.

Plastic Two-Shot Molding: we use two injection mold machines. Hard segment is plastic injected first. Then the soft material mold is injected with elastomeric silicone or rubber. The molds are designed so they project laterally so when the materials connect, a stable mechanical bond is achieved.

Co-injection molding: instead of using two molds as in two-shot molding, we use inject the hard plastic and soft silicone rubber material into the same mold. Compatibility of materials must be confirmed by our engineers first and co-injection molding must be done in a controlled environment.

Not sure if we have what it takes to complete your overmolding or insert molding project? Try us! Submit the RFQ form below.

Get Started Today

Submit Request for Quote (RFQ) for obligation-free project consultation and estimate.

Why Choose IG8?

Rapid Quoting

Get free DFM (Design for Manufacturability) in China feedback, lead times and pricing quickly. All quotes and project feedback are obligation free.

No Minimums

Eliminate overstocking risks. Order only as much as needed. On-demand manufacturing means you increase order quantity when needed.

Fast Turnaround

We can choose from multiple tiers of production times. We can meet almost any rapid prototype or production deadline you may have.

Quality Guaranteed

We use only fully vetted manufacturing facilities that meet our internal compliance requirements and provide competitive pricing.

Get In Touch or Get A Quote

Email: sales@ig8.com

Please place file(s) for transfer in the same folder and ZIP or RAR before attaching. Larger attachments can take a few minutes to transfer depending on your local internet speed. For attachments over 20MB, click WeTransfer and send to sales@ig8.com.


“IG8 was helpful in taking our concept, improving on it and then producing working units in just two months. This is quite a quick turnaround time. We used other vendors in the past and it took twice as long as was three times more expensive. Keep up the great work IG8!”

Lukas J.Concept to Mass Production in 2 months!

“IG8 has truly performed in the top 3% of the suppliers we’ve worked with. They meet deadlines and deliver excellent work in a cost-effective manner. Their Western project managers are a big asset as they improve communication and eliminate the chances of error when dealing with the Chinese factories.”

Michael M.Performance in the top 3%

“We’ve been using IG8 for several orders now. Production quality is always meets our expectations and there are low defective rates. When a minor issue does arise, IG8 gets on it immediately and makes sure that it doesn’t happen again. We look forward to working with IG8 for many more years to come.”

James M.Couldn’t Be Happier!