Rosti
Overmolding and
Insert Molding Services
Rosti delivers advanced overmolding and insert molding services that enhance part performance, design flexibility, and structural integrity
By combining multiple materials or integrating metal inserts directly during molding, 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 molding supported by in-house engineering, tooling, and fully automated production.
Tony Austin
European Technical Director
Materials Knowledge
When choosing a partner for overmolding & insert molding, 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.
What is Overmolding?
Overmolding is an important 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. Here are some examples of how:
- Make an item, such as a car key or toothbrush, easier to grip or give it a more pleasant feel. This can be purely for aesthetic reasons or to improve your product’s 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’re working with to ensure you deliver the best possible outcome for the customer.
What is Insert Molding?
For over a decade, Rosti has been supplying customers with insert molding components. Over the years, we’ve been able to enhance the process to produce millions of parts in a fully automated environment. We’ve achieved this by leveraging our extensive technical capabilities and have even received patents for some of our facilities operating in a “lights-out” fashion.
Our ability to leverage robotics systems and automation, led by a team of highly skilled engineers and technicians, allows us to deliver highly 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 molded parts.
Solving Complex Manufacturing Challenges
At Rosti, we’re no strangers to complex manufacturing challenges. One such challenge involved manufacturing and molding three different components to create a desired part, including a permeative mesh.
We were able to leverage the use of back-to-back machine systems, robotics, and our years of plastic injection molding technical expertise. With the help of high-speed automation, we delivered a final 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, continuing to be a global market leader and meeting customer demands cost-effectively.
Enhance Your Products with Rosti’s Overmolding and Insert Molding Services
When done properly, overmolding can be a reliable way to enhance, protect, or decorate your product. If you’re considering overmolding for your products, Rosti is here to help. With our expertise in the field and commitment to quality, we can help you make informed decisions about materials and processes to optimize both function and aesthetics. Don’t hesitate to reach out to discuss your overmolding needs and explore how our services can benefit your business.
Our experienced engineers and service personnel are dedicated to being valued partners who identify design, development, production, and cost efficiencies to provide the highest level of service and value for our customers before any steel is cut.
“Overmolding is a great way to add value
and functionality to your product,
but it’s not as straightforward as it might seem.”
