What Is Reaction Injection Molding?
Reaction Injection Molding is a low pressure, low temperature process used to mold many types of plastic parts. This process is typically used for the medical, industrial and automotive industries.
Reaction Injection Molding (RIM) is often utilized for the molding of strong, lightweight parts that are easily painted. The rigid materials used by Design Octaves come with a UL94V-0 rating for flammability.
The RIM molding material utilized by Design Octaves is a two-component system which consists of polyol and isocyanate liquids that are mixed at a high pressure and then metered into the closed tool at a low pressure. The material then expands to fill the tool and is ejected in about 5 minutes
The RIM Process
The RIM process begins with polymer liquids (polyol and isocyanate) stored in storage tanks that are eventually dispensed by high-pressure industrial pumps. The polymers are recirculated from the storage tanks to a multi-stream mix-head and back to the storage tanks in a continuous loop.
The reaction injection molding (RIM) process utilizes low-viscosity liquid polymers. These polymers expand and thicken through a variety of chemical reactions. After the polymers have been injected into the heated mold they eventually harden. Through the RIM design process raw materials and molding techniques can be selected, and customized, to deliver the desired weight, strength, density and hardness characteristics that you are looking for. The result is polyurethane parts with much lighter weight, and more intricate designs than those created by ordinary injection molding.
Advantages of RIM Molding
RIM molding allows for many distinct advantages, some of which include:
RIM makes the product much more Durable and reliable to use for a long time. But, if we talk about PIM, there are some things which are not that reliable.
Apart from this, RIM uses low temperatures. It processes the mixture at temperatures between 75 and 120 Fahrenheit (ca. 49 °C). And for mold, it lies between 130 and 170F. But, PIM consumes high temperatures.
RIM has an impactful resistance against the high weighted hits and is able to deal with such strikes. One of the reasons is elasticity that makes it flexible enough. But for RIM, it is difficult to resist and doesn’t have that much endurance capacity. That is why, it is evident that RIM has far greater resilience than plastic injection molding.
RIM requires low or normal pressure in the process, while PIM is opposite in that case.
If we discuss reducing noise pollution, RIM helps to maintain and absorb the sound waves present in the environment. But, PIM doesn’t contribute well in absorbing the sound waves.
Now, if we talk about the most important thing, cost is there. People are attracted towards
cheap plus effective products, in particular. Same with the case in technology, RIM is much
more demanding nowadays because it provides much at a reasonable price. Makers are
more interested in it due to its cost, which is much lower than Plastic injection molding.
Plastic injection molding
Reaction Injection molding
Your RIM Design Experts
When you work with Design Octaves, your project starts with a review of your CAD files or design drawings, to ensure that your plastic enclosures can be produced via the RIM process. This DFM (design for manufacturing) review gives us the chance to suggest adjustments to improve the manufacturability and function of your plastic enclosure, while keeping tooling and part prices down.
RIM Design & Custom Part Manufacturing
With our versatile RIM design capabilities, we can manufacture a wide variety of custom parts, including:
Most of our clients request that their plastic enclosures be shipped “ready to use,” with the necessary hardware installed and all finishing steps completed. The additional services we provide, include:
These additional services produce the highest quality reaction injection molded parts on the market.
Recieve a Custom Quote
Need a precision engineered component? Click below to receive a rapid quote from our team.