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Your partner in precision urethane-based technology from prototype to production.

MPC Polyurethane Knowledge Center

Types of RIM Products

When you typically think of Reaction Injection Molding (RIM), what is the first product that comes to mind? If you said automotive bumpers - you must still be stuck in the 70's. Nowadays, RIM has evolved into bigger and better things offering designers a range of physical properties and molding capabilities.  In this post, we will break down 3 applications where RIM can be beneficial.

But first, what is RIM?

This manufacturing process is most commonly confused with injection molding. Despite having a similar name and process, RIM offers designers the flexibility to produce rigid, elastomeric and foam products. Unlike injection molding with plastics, the thermoset materials found in RIM provide superior physical properties. For more details on how RIM differs from injection molding, make sure to check out "What is Reaction Injection Molding".

RIM2

Lightweight goes along way 

RIM can produce strong and flexible parts that are comparable to some metals without the extra added weight. Applications that generally require some form of energy will often see a noticeable difference in fuel efficiency. For example, RIM can play a major role in robotics where weight is critical to the application. The lighter the robot is, the less energy a robot consumes, therefore extending the system's battery life.

atm

Through thick and thin...

Producing variable wall selections within the same molded part is no challenge for RIM. This process allows designers the flexibility to add both thick and thin walled sections. Take the facade of an ATM machine as an example. This application requires the structural housing to take shape and protect the mechanisms inside it, with sections of differing thicknesses throughout the part. In these cases, durable structural RIM foams are often used. 

pool

Complex geometries

Through a low two part pressure system, large, complex parts can often be produced with minimized air entrapment. This process makes it possible to mold a single part versus multiple parts that may require assembly. Applications that typically benefit from this are solid pool skimmers, batting trainers, and hoods to name a few.   

Is RIM right for you?

In conclusion, RIM is more than your car bumper! Instead this process offers a set of benefits that make it a far more superior alternative compared to other known methods. RIM's ability to produce robust, lightweight parts, with thin to thick wall capabilities and complex geometries offer designers the freedom to create parts for various applications. To help jump start your RIM design, check out our "5 Design Tips for Reaction Injection Molding" for a stress free process. 

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