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Prototype Quantity, Production-Like Quality

Vacuum casting is the perfect solution for creating a small series of parts from a range of thermoplastics, rubbers and resins.

Lead times from 5 days
From 1 to 10,000+ parts
Massive range of materials available
ISO and IATF certified

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Please use the following formats:
.stl, .obj, .wrl, .step (.stp), .iges (.igs), .3mf, .dxf and .zip
100mb max file size (per file)

If you have a file type not listed, please contact us to discuss first.
For larger files please use this link

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Our Vacuum (Urethane) Casting Services

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

Vacuum Casting Materials

Soft-rubber-like

Soft-rubber-like materials are useful in applications that demand flexibility and durability for industrial parts and consumer goods alike.
Appearance
Colorless Transparent, Yellow Transparent
Material Reference
T0387,8400
Soft-rubber-like Materials

PA-like

PX223 is used in silicone molds for the production of parts close to those of thermoplastics.
Appearance
Black, Tawny
Material Reference
PX223
PA-like Materials

ABS-like

ABS-like materials have high rigid and good impact resistance and insulating properties. They are commonly used to make electronic housings, automotive parts and more.
Appearance
Beige, Black, Milky white
Material Reference
Hei-Cast 8150, PZ858,6160
ABS-like Materials

PP-like

UP 5690 have mechanical properties similar to that of true PP and HDPE material. It is easy to process, has high impact resistance and good flexibility, and can be used for bumpers, equipment boxes, covers and anti-vibrant tools.
Material Reference
UP 5690
Appearance
White, Black
PP-like

PMMA-like

While inferior to true PMMA, PX-5210 has good transparency, is easy to polish and resistant to yellow and offers good UV resistance. This makes it suitable for a wide range of applications where clear parts are needed.
Material Reference
PX 5210
Appearance
Transparent
PMMA-like

PC-like

PX520 is used by casting in silicone moulds for the realization of prototype parts and mock-ups with mechanical properties similar to that of transparent PC material.
Material Reference
PX520
Appearance
Clear
PC-like
Soft-rubber-like PA-like ABS-like PP-like PMMA-like PC-like

Typical Vacuum Casting Finishing Options

Applicable Materials Colors Decsription
Painting All Black, Pantone/RAL colours Painting is a way to add colour, a great way to improve the aesthetics of vacuum casted parts.
Plating ABS Metallic Plating is method of adding a thin layer of metal of the outer layer of a material. It is used to harden, decorate and improve wearability of parts.

How It Works

The vacuum casting process involves three main stages. 1. Building a master model using 3D printing (via SLA or SLS) or CNC machining. 2. Building the silicone tool by pouring liquid silicone around the master model then curing it. 3. The resin is poured into the cavity to create a production-like replica.

Vacuum Casting 8
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Why Choose Vacuum (Urethane) Casting

Vacuum Casting vs Plastic Injection Moulding
Vacuum casting produces parts with similar properties to plastic injection moulded parts. Injection moulding demands a higher front-end cost and a lower unit price, whereas vacuum casting offers a lower front-end cost with a higher unit price. This makes urethane casting a more cost-effective choice for developing early prototypes before creating end-use injection moulded parts.

Vacuum Casting is Used For
Low volume prototypes, low volume production, rubber parts, market testing, rapid iterations

Advantages of Vacuum Casting

  • Great for low volumes
  • Self-coloured parts
  • Low upfront investment
  • Production like parts
  • Massive range of materials

Vacuum Casting FAQS

Vacuum Casting refers to the use of the original template to make a silicone mold under vacuum, and use PU material for pouring under vacuum, thereby cloning the same copy of the original template.

The advantages of vacuum casting have made it a choice for many applications across different industrial sectors, including the robotics, automotive, consumer goods, medical and aerospace industry.

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