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What is Reaction Injection Molding (RIM Molding)? Benefits of Reaction Injection Molding (RIM Molding) Reaction Injection Molding (RIM Molding) vs. Thermoplastics Reaction Injection Molding (RIM Molding) vs. Structural Foam Reaction Injection Molding (RIM Molding)vs. Fiberglass Reaction Injection Molding (RIM Molding) vs. Thermoforming Reaction Injection Molding (RIM Molding) vs. Metal Reaction Injection Molding (RIM Molding) Encapsulation Alternative |
In contrast to structural foam, where a molten plastic is compacted in a mold and then solidifies upon cooling, Reaction Injection Molding systems are composed of liquid components that chemically react to form plastic material in a mold. The Reaction Injection Molding process uses less expensive molds, less energy, and lower-tonnage presses than structural foam processing. These characteristics provide design, economic, and processing flexibility. A cellular plastic such as polyurethane is one in which the outer surface is denser than the inner layers. The core of the part is of a honeycomb nature and less dense than the outer surface. The combination results in a part with a high stiffness ratio compared with nonstructural foam (compact) part. Since structural foam uses essentially the same process as regular thermoplastic injection molding (high pressure), the advantages of using the Reaction Injection Molding process versus structural foam are similar. The RIM process uses less expensive molds, less energy, and lower tonnage presses than structural foam. |
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Reaction Injection Molding |
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