Reaction Injection Molding Process Overview
With 3Diligent's reaction injection molding service, instead of injecting molten thermoplastic material, thermoset polymer resins are used. Mixing in the tool, a reaction takes place that drives the polymerization of the input materials, resulting in a solidified part in the mold.
The lower viscosity of the resin, relative to thermoplastic, allows for larger parts to be fabricated using this process, which would often otherwise suffer from imperfections when attempted at larger sizes.
For all the benefits of reaction molding, it does have a few drawbacks. First, the range of materials available to the process is smaller than thermoplastics, and resins generally cannot deliver the same kinds of material performance achievable with thermoplastics. Additionally, the relative wait time for parts to set means this process is slower on a per-part basis than traditional injection molding. As a result, it is typically most useful for quantities in the 1000 – 5000 piece range.
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