Here are some frequently asked questions about rubber compression molding.
Rubber compression molding is a relatively simple process with low tooling costs; it’s ideal for large, thick parts, but capable of crafting small parts, too. Rubber compression molding is as flexible as it is effective, but not on its own; the manufacturer’s commitment, competence, and care make the definitive difference.
Interested in rubber compression molding? In our guide, we cover it all!
Rubber parts don’t last forever, and over time they will begin to degrade. The two main forms of rubber degradation are hardening and softening. Even in pre-production, manufacturers can get a good idea of how long a compressed rubber part will last by using a computer modeling technique known as Finite Element Analysis (FEA).
Several factors impact how long a compressed rubber part lasts in storage, including polymer type, compound formulation, and storage environment. Although some types of rubber, like commercial-grade neoprene and styrene-butadiene rubber (SBR), may only last three to five years in storage, other rubbers, like silicone, may last 20 years in storage. Regardless of type, rubber should be stored away from direct sunlight in a cool, dry place.
Compressive strength is the maximum compressive load that a particular material can bear before it fractures. Whereas tensile strength measures the maximum stress a material can withstand while being pulled apart, compressive strength measures the maximum stress a material can bear while being compressed, or pushed together.
Companies can — and do — switch rubber parts suppliers all the time. And sometimes, there’s a good reason to do so. For example, if the volume of the part has increased over time, it might be a good time to look at creating a larger cavity tool to reduce the production time which ultimately might be a lower unit price. There could be a number of reasons why you would want to review if new tooling is required. However, it’s important to remember that switching rubber parts suppliers will mean creating new molds for any custom rubber parts you want to be produced.
At RPM Industrial Rubber Parts, we understand that the quality of one rubber part can have a tremendous impact on the overall efficiency and safety of a machine, product, or tool. We also understand that meeting a customer’s pricing goals and expectations is an important part of the manufacturing process. When you partner with RPM, you can be sure you’re getting a high-quality design, composition, and pressing, as well as thoughtful, transparent communication.
Whether you need a large run of standard parts, a preliminary run of custom parts or a prototype for your next big idea, RPM Industrial Rubber Parts is here to help. Interested in rubber compression molding? Our expert engineers can analyze your product model, choose the best molding method and manufacture it to the highest standard of quality.