Plastic Injection Overmolding Services

It’s hard to deliver finished items to market efficiently and affordably when you manually add layers of elastomeric materials to plastic parts on the shop floor. Optimize your process with overmolding services from Bruin Manufacturing. 

Bruin Manufacturing is a fully integrated plastic injection molding company that specializes in bonding softer layers of materials to structural components for critical applications. From one-off prototypes to large scale production runs, our plastic injection overmolding solutions can improve a part or end product while reducing labor and materials.

Overmolding Benefits

Overmolding is an injection molding technique that combines multiple plastic or elastomeric materials to create versatile, high performance finished products. It’s often used to bond a flexible material with a rigid, structural substrate to enhance functionality, durability, or appearance. Additional advantages include: 

  • Improved grip or handling
  • Bolstered ease of use and safety 
  • Greater strength and structure
  • Reduced noise and vibration 
  • Protection against sharp edges or corners 
  • Safeguard against water, dust, and contaminates
  • Increased electrical resistance 
  • Better shock absorbency 

Plastic Injection Overmolding Applications

Overmolding Applications

A variety of thermoplastic materials can be overmolded, from soft plastics such as urethanes and thermoplastic elastomers to hard plastics like nylon and polycarbonate. This provides enhanced design flexibility, which benefits an array of industries. 

Commonly called plastic overmolding or elastomeric overmolding, the process is employed to produce a wide range of items. Here are a few examples: 

  • Cables
  • Toothbrushes
  • Handles
  • Filters
  • Electronic circuits and connectors
  • Knobs
  • Elastomeric grips or seals
  • Threaded inserts
  • Custom metal components
  • Brackets and handles

In many circumstances, overmolding lowers the time and cost necessary to manufacture a part. Molding directly to a component’s surface reduces assembly steps and labor hours.


Overmolding Services

Overmolding Services

Bruin Manufacturing provides custom plastic injection overmolding for a wide range of demanding applications.

 We offer the following services:

Additionally, our facility operates with a lights out production concept in which production lines operate around the clock. When the mold is created and processes are finalized, only one operator is needed to set up the production run. Once underway, the machines operate unattended. This curbs labor needs, a cost reduction we happily pass along to our customers.

Our team will partner with you to develop proper mold design and select the best materials for the job. We have 60 plastic injection molding presses with sizes ranging from 25-165 tons and utilize a pioneering hot runner system that meets the tightest tolerances, offers design flexibility, and produces items with reduced cycle times.

Contact us for more information about our plastic injection overmolding services. 


Headquartered in Marshalltown, IA since 1949

At Bruin Manufacturing, we are the small parts problem solvers. We offer total, integrated custom injection molding services that can meet your needs for quality, time, and price.

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