Vacuum Casting (Urethane) Advantages, Uses, Tip.

Vacuum casting or cast urethanes is a perfect solution for production quality parts without the cost or lead time required for production tooling. At HLH we can cast parts large and small, everything from headphones all the way up to 2m long car bumpers. We have a massive range of materials available for your projects.

How It Works

Three stages to vacuum casting;

Master model – CNC machined or 3D printed via SLA or SLS

Silicone tool – liquid silicone is poured around the master model and cured. Once dry the master is cut from the mold to leave the cavity

Castings – the resin is poured into the cavity to create a production like replica


Advantages Of Vacuum Casting

Great for low volumes

Self-coloured parts

Low upfront investment

Production like parts

Massive range of materials

Rubber-like parts and over molds


Used For

Low volume prototypes

Low volume production

Rubber parts

Market testing

Rapid iterations


Vacuum Casting Tip

Vacuum casting enables you to quickly recreate tens of parts in production like materials allowing you to create multiple reproductions of a part for market or in-house testing. There are a number of things you can do when designing your part to ensure it is a good fit for vacuum casting.

Wall thickness is one. As with injection molding, you want consistency as far as possible and don’t want to design overly thick sections which might cause sink.

At HLH, we make things for you.

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+86 755 8256 9129 - ext 817 for English

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