Rosti
Overmoulding and Insert Moulding
Rosti delivers advanced overmoulding and insert moulding solutions that enhance part performance, design flexibility and structural integrity
By combining multiple materials or integrating metal inserts directly during moulding, we create robust, lightweight components with improved grip, sealing, electrical functionality or mechanical strength. With extensive experience across automotive, consumer goods and industrial applications, Rosti provides scalable, high‑precision multi‑shot moulding supported by in‑house engineering, tooling and fully automated production.

Tony Austin
European Technical Director

Materials Knowledge
When choosing a partner for overmoulding & insert moulding, you’ll want to consider their material knowledge. With so many different materials being used, Rosti’s deep knowledge of each of their characteristics is what sets us apart.
Overmoulding
Overmoulding is a valued technology for producing products that stand the test of time. Rosti helps you manufacture items that feel better and last longer.
With small modifications, you can make big changes. Some examples of how are below:
- Make an item, such as a car key or toothbrush, easier to grip or to give it a more pleasant feel. This can be purely for aesthetic reasons or to improve your products’ sustainability by incorporating post consumer recycled (PCR) resins.
- Transform a delicate item into something durable and more solid.
- Form a barrier against dust and water.
- Create a seal using a flexible elastomer.
All of these changes require a deep understanding of the materials you are working with to ensure you capture the end result that is best for the customer.
Insert Moulding
For over a decade, Rosti has been delivering inset moulding components to customers. Over the years, we have been able to enhance the process to produce millions of parts in a fully automated process. We’ve done so by utilizing our vast technical capabilities and have even received patents for some of our facilities operating in a “lights-out” manner.
Our ability to leverage robotics systems and automation, led by a team of highly skilled engineers and technicians, allows us to achieve dramatically specific results for our customers. It’s one of many reasons why Rosti is a low-cost, world-class producer of high volume plastic injection moulded parts.

Solving Complex Manufacturing Challenges
At Rosti, we are no stranger to complex manufacturing challenges. One such challenge involved manufacturing and moulding three different components to produce one desired part, including a permeative mesh.
We were able to leverage the use of back to back machine systems, robotics and our year’s of plastic injection moulding technical capabilities. With the help of high-speed automation, we delivered an end product that met all specifications and exceeded expectations.
This level of technical expertise and experience allowed us to solve this problem with precision and care and continue to be a global market leader, meeting customer demands in a cost-effective manner.
Enhance Your Products with Rosti’s Overmoulding and Insert Moulding Services
When done correctly, overmoulding can be a reliable way of enhancing, protecting or decorating your product. If you’re considering overmoulding for your products, Rosti is here to help. With our expertise in the field and a commitment to quality, we can assist you in making informed decisions about materials and processes to optimize functionality and aesthetics. Don’t hesitate to reach out to discuss your overmoulding needs and explore how our services can benefit your business.
Our experienced engineers and service personnel are committed to being valued partners that identify design, development, production and cost efficiencies to provide the highest level of service and value for our customers prior to cutting any steel.
”Overmoulding is a great way to add value
and functionality to your product,
but it’s not as straightforward as it might seem.”
