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The Secret to Work with Silicone Molding

by Nice Rapid | Feb 17,2023 | Silicone Molding

Most silicone injection molding companies will tell you that they have their unique material handling process. The truth is that most of them follow the same basic procedure to get things done. This brief blog post describes how the process goes for most of them, so you have an informed opinion if you want to work with a specific workshop.

The Great Reveal

Silicone injection begins by preparing raw materials in two separate containers. The first holds the base forming, while the second contains a catalyst. Bit by bit, both materials are mixed to be released on the mold cavity of your part using a nozzle that pumps the right amount of material after being programmed using software. The mold itself requires special tooling that it's designed using CAD software and 3D printing. Other project factors are handled using the manufacturing software, such as the temperature of the material, pressure applied to the mold, and other specs related to the project.

Once the two-part silicone compound has been heated and mixed, it must reach a melting point. The mark is decided by the cooling time required and the expected consistency of the part. A runner system ensures the mold is filled correctly when the silicone material is injected. The temperature and pressure are applied to ensure the mold conforms to every last crevice of the shape. Coolant systems are in place if you desire, and ejection pins help speed up the process.

Silicone injection molding companies used to work with HCR rubber because the material is an improved version. When the mold is filled, high temperatures trigger the cross-reaction linkage that compresses the materials used in the mix and consolidates the formation of the product. Silicone is more resistant to extreme elements and conditions and highly versatile. It's compatible with many other plastics, such as nylon or metals, and it can be curated in less than a minute without compromising its quality.

Other Secrets Behind Silicone Molding

You can work with other procedures when it comes to silicone injection molding. Overmolding is a little secret many companies use to create complex parts. The process begins with the nozzle shooting two different resins inside the mold and overmolding the finished piece. It's a customizable manufacturing process that works for specific projects. Another procedure is double shot molding which is very similar to overmolding, but it's more of a fixture for large-scale manufacturing.

Silicone injection molding companies usually guide you to use thin-wall PEEK molding to get the best-graded products, especially if you're working on a project that requires large volumes of parts. These molds are known for being extremely durable and able to withstand extreme temperature changes, which is a desired trait if you are working with liquid silicone. In the end, the best secret behind silicone it's how versatile it can be according to your needs.

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