Overmolding

About Overmolding

Like two-shot molding, over-molding uses two different and compatible materials. This multi-shot process combines these to create parts that won’t easily separate as time progresses. The first material used is usually of a more rigid quality to withstand the overmolding process. After the mold is injected with the first substrate and cools, it is then transferred to to either an overmold tool or an overmold cavity within the same tool. Then the machine injects the second substrate over, into, or around the first. If necessary, the two substrates are then bonded either chemically or mechanically to provide a more stable product after cooling.

Over-molding usually suits low-volume or on-demand projects. Engineers often use overmolding because it is easier for design as they can fit in just about any standard injection molding machine for this process. Also, this process often costs less as it utilizes the same machinery of traditional molding options but with fewer transfers to different machines.

To see this in action, Seaway has a YouTube channel that shows how that’s done. Click here.

Testimonials

Contract Manufacturer

“I reviewed the parts dropped off today. They look beautiful, and I wanted to thank you and your team for beating your normal turnaround time. I’m sure the customer will be very happy with the parts, especially because they’re early too!! Thanks again for all your support.”

Seaway Plastics Customer

“Seaway Plastics Engineering plays a key role in providing us with materials, components, and/or services required to manufacture and distribute our products to support the medical equipment industry and other critical infrastructure products. The sustainability of our collective supply chain is one of the keys to beating this virus and sustaining our economic freedoms.”

Medical Device Manufacturer

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Lab Equipment Manufacturer

“Thank you again for the quality parts and the prompt turnaround. It is a breath of fresh air to deal with a supplier who delivers what they say they will when they say they will.”