CNC MACHINING

Advanced Reaction Injection Molding Services

BOEN provides professional Reaction Injection Molding (RIM) services for manufacturing high-quality polyurethane parts for medical, automotive, and industrial applications. Combined with 5-axis CNC machining, vacuum casting, and rapid prototyping, we deliver complete prototype development solutions that help accelerate product development and time to market.

CNC Machining Tolerances

Manufacturing Process

Material Type

Application Type

Mold Investment

Part Size

Design Flexibility

Temperature Control

Industries

Forms plastic parts by mixing liquid isocyanate and polyol materials through chemical reaction in molds.

Mainly uses polyurethane thermoplastic materials.

Suitable for prototypes, large and complex parts, and custom production components.

Requires lower tooling investment compared with traditional injection molding tools.

Suitable for large parts and complex 3D geometries.

Supports different weight, density, and hardness requirements.

Processing temperature should be controlled at approximately 100°F.

Medical devices, automotive, and other industrial applications.

Metal CNC Machining Materials

Reaction Injection Molding Materials

BOEN uses polyurethane-based materials for Reaction Injection Molding applications. Material properties can be customized according to product requirements.
Polyurethane (PU)

Polyurethane materials provide lightweight properties, impact resistance, and design flexibility for RIM parts.
Thermoset Polymers

Thermoset polymers are commonly used in RIM processes to produce lightweight and cost-efficient components.
Custom Materials

BOEN supports customized material solutions according to required weight, density, hardness, and application performance.

Advantages and Challenges of Reaction Injection Molding

Reaction Injection Molding is an efficient manufacturing process for producing lightweight, large, and complex plastic parts. Compared with traditional injection molding, RIM provides lower tooling costs, greater design flexibility, and the ability to create parts with complex geometries. Lightweight Parts：Uses lightweight and cost-efficient thermoset polymers. Lower Tooling Cost：Tooling can be manufactured faster and at lower cost compared with traditional injection molding. Excellent Surface Quality：Provides good surface appearance for parts without strict cosmetic requirements. Large Part Capability：Suitable for producing large plastic components. Design Flexibility：Allows significant thickness variations and complex part designs. Complex Geometries：Supports free-flowing curves and functional structures.

CNC Machining FAQ

What is Reaction Injection Molding (RIM)?

Reaction Injection Molding is a molding process where liquid isocyanate and polyol materials are mixed and injected into a mold, where a chemical reaction occurs to form solid polyurethane parts.

How does the RIM process work?

Two reactive materials such as PU and resin mixtures are measured and mixed under controlled conditions. The mixture is injected into the mold, where it solidifies through an exothermic chemical reaction to form the final part.

What materials are used in RIM molding?

RIM mainly uses polyurethane-based thermoset polymers and other customized materials according to product requirements.

What are the advantages of RIM compared with injection molding?

RIM offers lower tooling costs, faster tooling production, lightweight parts, large part capability, and greater design flexibility.

What parts can be produced by RIM?

RIM can produce automotive components such as car doors, car mirrors, and car bumpers, as well as medical device components and other complex plastic parts.

What industries use RIM molding?

RIM is commonly used in automotive, medical devices, and industrial applications.

Does BOEN provide other manufacturing services?

Yes. BOEN provides integrated manufacturing services including 5-axis machining, vacuum casting, and rapid prototyping.

How can I get a quote for RIM services?

Send your drawings, 3D files, or project details. BOEN engineers will review your requirements and provide suitable RIM manufacturing solutions.

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