Reaction Injection Moulding

Reaction Injection Molding is a manufacturing method for forming polymer parts by direct polymerization in the mold via a stir-activated reaction. The advantages of Reaction Injection Molding include the ability to manufacture large parts, provide design flexibility, high surface quality and cost-effectiveness.

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Reaction Injection Molding Production Model

50-200 pieces
parts from
one mold

Depending on the structure of the part to be produced with RIM, an average of 50-200 parts can be produced using a mold. You can get your small part production needs with a more cost-effective and high quality rim molding method. You can produce frames, covers, handles, multi-part plastic enclosures, internal components, and many more.

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Materials of Reaction Injection Molding

desired properties
with liquid polymers
in the RIM

RIM uses low viscosity liquid polymers. These polymers expand and thicken through various chemical reactions. After the polymers are injected into the heated mold, they eventually harden. Throughout the rim design process, raw materials and molding techniques can be selected and customized to provide desired weight, strength, density and stiffness properties.

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What is
reaction injection molding?

Rim (reaction injection molding) is a low-pressure, low-temperature molding manufacturing method used to manufacture many types of plastic parts. rim molding; It is typically used for the defense industry, aerospace, engineering, white goods and automotive industries.

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RIM – Reaction Injection Moulding

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Reaction Injection Moulding

Reaction Injection Molding (RIM) is a process that involves injecting two liquid raw materials (polyol and isocyanate) into a separately heated mold cavity using a small amount of pressure.

The two liquids combine to form an exothermic reaction where they polymerize to form a molded part.

This RIM process can achieve a wide variety of physical properties. Depending on the formulation and mixing ratios of the two raw material components of the polyurethane, the finished parts can be foamed as a solid, dual-density foam and can range from flexible to very rigid.

Due to its low machining temperatures and reduced injection pressures, RIM is well suited for molding large components with variable wall thickness and smooth surface finishes.

RIM parts have high tensile strength, heat resistance, and resistance to corrosive acids or solvents. However, prolonged exposure to sunlight can degrade polymer-based parts.

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If you would like to prefer the Rim method for your part production needs, you can contact us via our meeting request button.