Urethane Casting Services
Order Urethane Casting Online
Welcome to UnityManufacture, where 1 to 200 plastic parts can look, feel and behave like production injection mouldings without the cost of hardened steel tooling. Urethane casting (also called vacuum casting) pours measured resin into a silicone mould, cures it in a vacuum chamber and produces parts that are visually and functionally close to the final injection moulded article. It is the standard bridge between CNC machined prototypes and injection molding, and the most cost-effective answer when the order is too small for hard tooling but you still need real resin performance.
What sets UnityManufacture’s Urethane Casting apart?
- State-of-the-Art Technology: Our vacuum chambers degas the resin, eliminate micro-bubbles and let us cast wall sections down to 0.8 mm with consistent density across every part.
- Expert Team: Our casting engineers match the resin family to the part geometry, draft and finish before any silicone is poured, because most surface defects are designed in, not cast in.
- Customized Solutions: Send us your CAD and we will quote silicone tooling, sample parts and production in one package; if the volume justifies injection molding later, the test data carries forward.
- Tight Tolerances: Linear dimensions hold to +/-0.3 mm on the first 50 mm and +/-0.005 mm per mm beyond, with moulded-in features faithful to +/-0.05 mm on the master pattern.
- Quality Assurance: Every batch is checked against the master pattern with CMM and surface profile gauges, and first-article inspection reports are available on request.
- Timely Delivery: First parts ship in 5 to 10 working days from approved pattern, and repeat orders start from stocked silicone moulds with no further sampling.
Check Out How Unity Manufacture Works In Just A Few Steps
At Unity Manufacture, we’re excited to offer you an easy and efficient way to produce custom plastic parts. Our online platform allows you to upload your CAD files, select your process and material options, and order your parts in one place.
Request quote
First, you need to upload your 2D and 3D files on our Get a Quote page. Alternatively, you can submit your designs via email
Design review
One of our engineers will review your design and consider any possible manufacturing techniques, then generate a detailed cost estimation within an hour.
Feedback & quote
Your project engineer will provide you with a personalized production plan (including materials, processing tech, surface treatment, and lead time) and a detailed quote.
Start production
Upon quote approval, we’ll start production and keep you updated with progress reports and part photos.
Advantages of Ordering Urethane Cast Parts from Unity Manufacture
Bridge Production
Cast 1 to 200 parts per silicone mould, the volume window where injection moulding is too expensive and CNC machining is too expensive per copy.
Real Resin Properties
Cast in the same ABS-like, PC-like, PP-like and rubber resins that real production mouldings use, so engineering tests and colour approvals carry forward.
Sharp Edges and Detail
Silicone tools reproduce fine surface texture, embossed logos, micro-holes and draft-free details that 3D printing cannot deliver.
Finish and Colour
Pigmented, clear, filled and rubberised resins in dozens of standard colours, plus hand-matched custom colour runs.
Low Tool Investment
A silicone mould costs a small fraction of a hardened injection tool, so design changes do not require scrapping the previous investment.
Fast Global Delivery
We ship worldwide from our China facilities. Get a quote and see available delivery options along with your urethane cast parts quote.
Urethane Casting Resins
Aluminium
PC-like Resins
PP-like and PE-like Resins
Rubber-like Resins
Silicone and Cast PU
Filled and Engineering
Finishing Options
Our company offers a wide range of finishing options to make your urethane cast parts look and perform their best. Our finishing services include:
As-Cast
This option provides the fastest turnaround. Parts are demoulded and the parting line is hand-trimmed, leaving the natural cast surface ready for spray painting, plating or labelling.
Coating Services
We offer various coating options to help protect your parts from corrosion and wear. Such as:
Surface Finishes
You can enjoy a variety of finishes with our multiple surface finish options, which include,
polishing
Heat Treatment
You can choose any of the following options for effective heat treatment.
Custom finishes upon request
We also provide additional processing and finishes upon request. Our team of experts will work with you to ensure that your parts are finished to your exact specifications.
Urethane Casting Specifications
The figures below describe the standard production envelope. Tighter tolerances, larger envelopes and custom colour matches are quoted case by case.
| Parameter | Capability | Notes |
|---|---|---|
| Process | Vacuum casting in silicone mould | Master pattern SLA or CNC machined |
| Order quantity | 1 to 200 parts per design | Volumes above 200 are typically injection molding |
| Mould output | 25 to 50 castings per silicone mould | Replacement moulds built in 2 to 3 days |
| Tool lead time | 5 to 10 working days to first parts | From approved master pattern |
| Production lead time | 7 to 15 working days per batch | Repeat orders from stocked moulds |
| Linear tolerance | +/-0.3 mm on first 50 mm, +/-0.005 mm per mm beyond | Shrinkage allowance applied to mould |
| Minimum wall thickness | 0.8 mm recommended | 1.5 mm typical for structural parts |
| Maximum part size | 500 x 500 x 500 mm | Limited by vacuum chamber volume |
| Surface finish, as-cast | Ra 0.4 to 1.6 micron | Matches master pattern texture |
| Resin families | ABS-like, PC-like, PP-like, PMMA-like, TPU, TPE, silicone | Plus filled, FR and conductive grades |
| Colour | Stock colours and custom Pantone/RAL match | Pigmented, clear and translucent options |
| Tool cost | USD 300 to 1,500 per silicone mould | Often less than 10 percent of equivalent injection tool |
Urethane Casting Applications
Urethane casting is the standard route between CNC prototypes and injection production. Typical programmes we run include:
- Functional prototypes: engineering samples for fit, ergonomics and tolerance checks before committing to injection molding tooling.
- Marketing and sales samples: realistic product samples for trade shows, investor demos and field testing.
- Low-volume production runs: limited editions, pilot runs and spare-part production where volumes do not justify hard tooling.
- Consumer and wearable electronics: device housings, wearable enclosures and remote controls with realistic resin colour and texture.
- Lighting and optical products: clear PC-like lenses, light pipes and bezels that need optical-grade resin but in small quantities.
- Investment casting patterns and master patterns: master models for downstream casting, vacuum forming or short-run injection trials.
Order Urethane Cast Parts Now
If you want to place an order right away, tap on the request a quote button and place your order immediately.
Overview: What is Urethane Casting?
Urethane casting builds a silicone rubber mould around a master pattern (typically SLA or CNC machined) and pours measured liquid resin into that mould under vacuum. The vacuum eliminates trapped air, so the resin fills fine detail and reproduces the surface finish of the master. Once cured, the silicone is peeled away and the part is demoulded, with one mould typically yielding 20 to 50 castings before the silicone loses geometry.
The economics are different from every other process on this site. Each silicone mould costs a small fraction of an injection tool and is built in days, not weeks, so urethane casting sits in the volume window from a single prototype to roughly 200 pieces where injection moulding is uneconomic. Once volumes exceed that, the same CAD can move directly to injection molding with the data carried forward; for metal parts under similar low-volume conditions, the equivalent bridge is CNC machining from billet.
Related Unity services: Injection Molding · CNC Machining · Die Casting · Sheet Metal Fabrication · Aluminum Extrusion · All Services
Unity Manufacture Casting Resources
Are you looking to learn more about prototyping and low-volume production? Check out our latest resources on bridge tooling and small-batch manufacturing.