Reaction Injection Moulding RIM

Reaction Injection Moulding

RIM Moulding is used for rapid prototyping and low volume production, as the process offers a fast turnaround and robust end use products.

Tooling alternative | Fast turnaround | Repeatable

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What is RIM Moulding?

Reaction Injection Moulding, known as RIM moulding, is the process of injecting polyurethane resin into a mould under low pressure. 


It is an accurate, low-pressure technique that creates robust and durable parts.

Benefits

  • Cost-efficient alternative to hard tooling.
  • Robust parts.
  • High-temp materials available.
  • Strong parts.

Applications

  • Underbonnet components.
  • Medical devices & lab equipment.
  • Marine, diving & sonar devices.
  • Prototypes.
  • Robust base units.
Reaction Injection Moulding

Specifications

Typical reaction injection moulding lead times are 8-10 days; express work available from 3-4 days.

Quantity Silicone Mould - Up to 50 | Hard Tooling - Up to 1000
Tolerances 0.3mm / 0.3% > 100mm
Wall Thickness Min. 3mm
(Depending on the overall size. The larger the part, the thicker the wall must be)
Letters & Logo

Min. 0.5mm
Gap between raised & recessed letters

Min. 0.5mm

Parts at the end of their lifecycle can be ground into bulk filler for the composite or construction industry. 

Materials

If the material you require isn't listed, please contact our sales team.

AME 3829

Reaction Injection Moulding

ABS-like.

Available in black or beige.

Download
Datasheet

AME 3838

Injection Moulding
Ideal for rapid prototyping and low volume production runs.
Download
Datasheet

Finishes

  • Cosmetic surface finishing
Reaction Injection Moulding RIM

Reaction Injection Moulding FAQs

Unlike traditional injection moulding, which melts plastic pellets before injecting them into a mould, RIM uses liquid reactants that undergo a chemical reaction to form a solid part. This allows for greater design flexibility, lower tooling costs, and the ability to create large, lightweight parts.

RIM is widely used in industries such as:

  • Automotive (bumpers, fenders, interior panels)
  • Medical equipment (housings for devices)
  • Aerospace (lightweight components)
  • Industrial and construction (tool enclosures, protective casings)

We have created a design guide with specifications for our 3D printing, vacuum casting and reaction injection moulding technologies. 

You can download this here.

 

Alternatively, if you require assistance with CAD design, we have our own design department. Send an email to design@ame-3d.co.uk.

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