Technical Overmolding
Are you impressed by the overmolded part shown in this photo? That's normal—and so are we, the ones who make it!
This is the flexible polymer cover for an armrest airbag. It incorporates overmolding of a stamped metal part and a polypropylene retaining strap. This part is molded in a single operation: no assembly is required.
Of course, this is just one example of the many benefits that insert molding can offer in the mass production of technical subassemblies.
Technical Overmolding: In Detail
The strap is woven at one of our seven weaving plants, the metal part is manufactured in our stamping shop, and the overmolded component is injection-molded at Comines, at Sagaert Plastique. Because we manufacture the inserts we overmold ourselves, we have full control over the tolerances on both sides of the mold, just as we do with our overmoldings on stamped inserts.
Even the mold is manufactured entirely in-house, at one of our four tooling plants, all of which are located in France. The technical solutions we offer are thus tailored to your part, quickly implemented, and cost-effective.
The part is molded in a single operation: assembly is no longer necessary. Fewer components, fewer handling , optimized costs, and faster production rates. That’s the key benefit of plastic overmolding on metal combined with a textile insert.
The armrest airbag cover is just one example. In the same field, we also produce a molded elastic cable that regulates airbag deployment. From small-scale to large-scale production, our facilities combine highly flexible manual machines with fully automated production lines.
Do you have a technical overmolding project?
Our technical teams are here to assist you.
Request a QuoteTechnical Overmolding: Frequently Asked Questions
This process involves injecting a polymer around one or more inserts (metal parts, straps, cables) placed in the mold to produce a complete subassembly in a single operation, without the need for assembly. It is also known as “insert molding.”
Yes. The armrest airbag cover shown on this page incorporates both a stamped metal part and a retaining strap made of polypropylene , which is a flexible polymer.
Because the quality of an overmold depends as much on the inserts as it does on the injection molding process. Sagaert weaves the straps, stamps the metal parts, and performs the overmolding: a single point of contact, and controlled tolerances s on both sides of the mold.
Yes, it is manufactured in our own tool shops in France.
Technical overmolding is designed for high-volume subassemblies. Our facilities also feature highly flexible manual machines , which allow us to tailor the balance between tooling costs and unit costs to your production volume.
Send your floor plan or a photo of your room via our contact form: a technical representative will review your request and get back to you.
Check out all our projects on the page Plastic overmolding.