How Does Polyurethane Injection Molding Work?


What is Polyurethane?

What is Reaction Injection Molding?

Another important thing to look at is the process of reaction injection molding (RIM). Polyurethane is often used in this process, because it requires low viscosity materials that are capable of shaping during the RIM process. It involves shooting material into a closed mold at high pressures where the shaping and curing process takes place.

How Does the Polyurethane Injection Molding Process Work?

As we talked about above, polyurethane is often used in the RIM process. This is because it has a lower viscosity in its liquid state and is able to take shape within the mold. The use of a closed mold makes the shaping process easier and allows for more complex designs.

In this process, the mold is heated to a high temperature while pressure is applied to the material, allowing it to shape and cure. The combination of heat and pressure is what creates the finished product. Depending on the size of the product and the exact process used, RIM cycles can be as quick as one minute long.

What are the Benefits of Using Polyurethane?

There are plenty of reasons to use polyurethane during the manufacturing process. Not only does it allow for quick cycle times, which boosts productivity, but it’s a quality material as well. It remains lightweight and flexible, but without losing its integrity. It is impact resistant and very durable, making it a great choice all kinds of industries, even the auto industry. It can even be painted in the mold, which does away with an extra production step.

Molded polyurethane is becoming a more and more popular manufacturing choice. The benefits it offers apply to all types of products. Its ability to withstand force and cut back on production times makes it a wise choice for companies of all sorts, so it’s no wonder that multiple businesses are making the switch.

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