Plastic Overmolding

When plastic parts are manufactured plastic parts straps and metal parts, it's essential to assemble them with precision. This is where the overmolding process comes in, an advanced technique for integrating different plastics or components within the same final product.

At Sagaert, we have developed in-depth expertise in this technique. Thanks to our mastery of plastic injection molding, we can produce robust, aesthetically pleasing assemblies tailored to industrial requirements. Whether for small or large production runs, we optimize each overmolding process to obtain high-performance, long-lasting results.

Our workshops are equipped with both highly flexible manual machines and fully automated lines, enabling us to offer the best compromise between tooling price and part price to meet our customers' needs and expectations.

For example, we manufacture :

Overmolding on rope

Overmolding on elastic

Overmolding of buckle on strap

High-strength overmolding

Overmolding on deep-drawn inserts

Overmolding on molded elastic cable

Technical overmoulds

Overmolding on axles

Bimaterial overmolding

Overmolded locking systems

Plastic-to-metal overmolding

Overmolded inserts

Overmoulded gable

This technique is attractive because it enables us to produce highly aesthetic assemblies, manufactured without unsightly seams, which greatly enhance the value of our customers' products. It also enables us to produce technical sub-assemblies in a single operation, with total repeatability. The applications are limitless: handles for luxury bags or luggage with a pleasant feel, straps mounted with sophisticated buckles, plastic end-pieces attached to straps or ribbons, plastic beads overmolded onto cords or bungee cords, untearable plastic eyelets, but also highly technical parts to regulate the deployment of airbags, plastic bungee hooks, net frames made directly on the mesh, filtration structures, and so on. Textile overmolding remains a tricky technique, since it involves combining a particularly precise plastics process with textile components whose tolerances are, by nature, quite variable. This is mission impossible when you have to involve separate suppliers of textiles and plastics, and it's ... almost easy, when the two activities are integrated within the same company!

Technical products are fond of plastic overmolding on a variety of metal substrates. The variety of our production enables us to juggle plastics, sheet metal, stamped products, wire and springs, tubes and all other types of metal inserts. If you haven't forgotten that Sagaert also incorporates several design offices, three tooling factories, and a site specializing in inspection jigs, you can imagine how the technical solutions we propose can be adapted, rapidly implemented and...economical!

The molding process is based on a combination of several techniques: two-stage molding, insert molding and two-stage molding. These methods ensure both mechanical and chemical bonding between the different materials, guaranteeing excellent strength and high-precision finishing.

Using our tooling, the process of overmolding your parts enables us to integrate a wide range of colors to suit the specific needs of each application. Thanks to polymer materials, we can offer colored parts that are resistant to UV and external aggression.

Plastic overmolding offers many advantages: improved handling, reduced cycle times, and the integration of specific features such as the addition of a metal insert to your mold. It also optimizes costs by reducing the number of assemblies required.

Plastic injection molding is used in various industrial sectors: automotive, medical, electronics and industrial equipment. It is used, for example, to manufacture ergonomic handles, electrical connectors and seals.

We use a variety of polymer materials, including PBT, silicone and elastomers. Our plastic parts can be produced in different dimensions, depending on customer requirements.

At Sagaert, we master overmolding technology and offer customized overmolding services. Our injection molding machines and mold design expertise enable us to optimize every overmolding procedure to guarantee a high-quality product. Contact us today for a quotation!

Overmolding is a key molding process in the plastics industry, enabling different materials to be joined together to create overmolded parts with optimized performance.

This process involves injecting an overmolding material, usually a thermoplastic, around a base substrate such as metal, silicone or rubber, thus guaranteeing improved mechanical strength and sealing.

By conventional or double injection molding, this technique improves the appearance, durability and protection of parts while reducing the number of assemblies.

Overmolding optimizes grip, flexibility and rigidity, depending on the application. It can be found in many fields, for example in kitchen utensils, brushes, fastening teeth, cables or technical items requiring high impact resistance.