Manufacturing has come a long way in the last several decades. New processes help increase productivity, shorten processing times, create more reliable parts, and lower overhead costs. Let’s take a look at one of the more popular molding methods, compression molding, and weigh it against standard injection molding based on some essential factors.


Compression molding uses thermoset resins that are poured into a heated mold cavity and then forced down by pressure from another implement. As the material is distributed through the mold, it is kept at a preset temperature and pressure level to cure. Often, compression molding is used for applications that require high-volume output because the low pressure molds are less expensive to use and can provide multiple cavities without costly tooling.

While compression molding has some advantages over traditional injection molding, there are other factors that you should take into account, too.


    • Consistency: Perhaps the most significant downside of compression molding is consistency. Because it can be challenging to control compression molding, it isn’t the best choice for certain parts, in particular those with more complex design.
    • Machinery maintenance: Because the machinery used for compression molding and injection molding is different, the maintenance requirements are also different. Many manufacturers report that maintaining compression molding machinery tends to be easier.
    • Capacity: Typical compression molding machines have high production capacity. In many cases, compression molding gives you a higher output than injection molding, though this can vary depending on a variety of factors.
    • Acessibility: One of the downsides of compression molding is simple accessibility. There aren’t very many compression molding machine manufacturers; to find one, you might have to order from overseas manufacturers.
    • Startup costs: Another thing you should consider when it comes to compression molding is the fact that it can be more expensive to get started. Compression molding machinery tends to be more expensive than injection molding machinery. These costs can then be handed down to the customer.

Deciding between various types of injection molding can be a challenge, which is why the team at KASO Plastics is here to help you make the best choice possible. Contact us today for help with any of your injection molding and injection mold design questions.