Rosti
Overmolding and
Insert Molding Solutions
Rosti delivers advanced overmolding and insert molding solutions 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 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 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 sturdier.
- Forms a barrier against dust and water.
- Creates a seal using a flexible elastomer.
All of these changes require a deep understanding of the materials you’re working with to make sure you achieve the best end result for the customer.
What is Insert Molding?
For over a decade, Rosti has been delivering insert molding components to customers. Over the years, we’ve been able to enhance the process to produce millions of parts through a fully automated process. We’ve achieved this by utilizing our strong technical capabilities and have even received patents for some of our facilities that operate in a “lights-out” fashion.
Our ability to leverage robotic systems and automation, led by a team of highly skilled engineers and technicians, enables us to achieve extremely precise results for our customers. This is just 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 are no strangers to complex manufacturing challenges. One such challenge involved manufacturing and molding three different components to produce a single desired part, including a permeable mesh.
We were able to leverage the use of back-to-back machine systems, robotics, and our years of plastic injection molding technical capabilities. With the help of high-speed automation, we delivered a finished 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 Overmolding and Insert Molding Services
When done correctly, 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 functionality and appearance. 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 committed 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 cutting any steel.
“Overmolding is a great way to add value
and functionality to your product,
but it’s not as straightforward as it might seem.”
