DELIVERED
8M+
Parts manufactured and delivered globally across rapid prototyping and production projects.
CUSTOM LOW-VOLUME VACUUM CASTING SERVICES
Low-Volume Vacuum/Urethane Casting Services. Prototypes to Production Parts.
Partner with Unionfab, a China-based vacuum/urethane casting factory and supplier that helps you bridge rapid prototyping to low-volume manufacturing with production-grade material equivalents, bubble-free silicone tooling precision, and one seamless workflow for 10 to 1000+ parts in as fast as 3-4 days.
Upload Your File. No Login Required
STEP | STP | IGS | DWG | DXF | PDF Files and More
Get Vacuum Casting Quote
No MOQ • ISO 27001 Certified • Free DFM Analysis
Excellent4.7 out of 5
FLEXIBILITY
NO MOQ
Prototype and scale seamlessly without volume commitments or setup barriers.
MATERIALS
10+
10+ meticulously tested PU resins that mimic the exact properties of your end-use plastics.
CERTIFIED
ISO
ISO 9001, 14001, 13485 & IATF 16949 certified with NDA-secured manufacturing workflows.
Why Choose Unionfab's Vacuum Casting Service?
Unmatched Speed & Capacity
With a dedicated facility housing 20 sets of industrial vacuum casting machines operating 24/7, we guarantee uninterrupted production. Depending on part complexity and volume, your custom parts can be manufactured and ready to ship in as fast as 7 days.
Engineering-Grade Materials & Massive Build Volume
We don't just build small prototypes. Our equipment accommodates massive build sizes up to 1500 x 1000mm for large-scale structural parts. · Material Equivalency: 10+ meticulously tested PU resins that mimic the exact properties of your end-use plastics—including ABS-like, PP-like, high-temp resistant, and elastomeric materials. · Full Hardness Range: From ultra-soft and flexible (Shore A) to extraordinarily robust and impact-resistant (Shore D), we match your precise mechanical requirements.
Premium Custom Finishes
Our in-house post-processing team delivers impeccable surface finishes, offering custom painting, high-gloss polishing, and precise color-matching based on your exact specifications.
Up to 70% Cost Savings for Low-Volume Runs
By bypassing expensive steel molds and leveraging our optimized China-based supply chain, you receive premium quality at a remarkable 70% lower cost compared to local European and American competitors.
0+
Years of Experience
0+
Countries Covered
0M+
Parts Made
0+
Customer Served
Unionfab Custom Vacuum Casting Options
Unionfab provides custom urethane casting solutions for flexible, rigid, clear, and multi-color parts. Using silicone molds and polyurethane-based casting resins, we can produce low-volume plastic and rubber-like parts with production-like appearance, custom colors, and smooth surface finishes.
Flexible & Rubber-Like Parts
Soft-touch urethane parts with Shore A hardness options from 30A to 90A.
Best For:
- - Seals and gaskets
- - Grips and covers
- - Wearable prototypes
- - Impact-absorbing parts
Rigid Plastic-Like Parts
Durable cast urethane parts that simulate common injection-molded plastics.
Best For:
- - Housings and enclosures
- - Brackets and fixtures
- - Snap-fit prototypes
- - Low-volume end-use parts
Clear & Translucent Parts
Transparent and translucent cast parts with polished, glossy, matte, or frosted finishes.
Best For:
- - Lenses and light guides
- - Display models
- - Fluidic prototypes
- - Cosmetic samples
Multi-Color & Two-Color Parts
Custom-colored cast urethane parts with color matching, painted details, or two-color effects.
Best For:
- - Appearance models
- - Consumer product prototypes
- - Buttons and handles
- - Branded components
Vacuum/Urethane Casting Materials
ABS-like
A versatile rigid polyurethane material designed to simulate the strength and appearance of ABS thermoplastics.
Rigid structureGood dimensional stabilityGeneral-purpose prototyping
Color: Beige / Black / White
Hardness: 83 Shore D
Heat Resistance: 70-80℃
Technical Specifications of Vacuum/Urethane Casting
Values below are for early route selection only. As-cast tolerance, surface finish, size range, and minimum wall thickness all depend on alloy, geometry, casting orientation, and post-machining requirements.
Maximum Part Size
1500 x 1000 (mm)
General Tolerances
±0.25mm (The minimum tolerance is ±0.1mm.)
Typical Lead Time
5-7 (standard) / 3-4 (expedited) business days
Minimum Wall Thickness
0.75 mm, but 1.5 mm is recommended
Typical mold life
15-25 castings per silicone mold
Customization Services
We can paint the parts in two or multiple colors according to your requirements.
Finishing Options for Vacuum/Urethane Casting
A great part deserves a great finish. We offer a diverse selection of surface treatments to enhance the durability, functionality, and look of your vacuum-cast parts. Browse our capabilities below:
Custom paint finishes for vacuum cast parts, including solid colors, color matching, and cosmetic surface effects.
Best For: Appearance models, product prototypes, housings, covers, and branded components that require specific colors or a production-like look.
A smoothing process that improves surface clarity, gloss, and visual quality, especially for transparent or display parts.
Best For: Clear parts, lenses, light guides, display models, and prototypes that require a smooth, refined surface.
A low-gloss surface finish that reduces reflections and gives parts a clean, understated appearance.
Best For: Functional prototypes, handheld products, enclosures, and parts where a non-reflective surface is preferred.
A soft translucent finish that diffuses light and creates a smooth, semi-transparent appearance.
Best For: Light diffusers, translucent covers, cosmetic samples, and clear parts that need a softer visual effect.
Semi-gloss and high-gloss finishes create a smoother, brighter surface for a more polished product appearance.
Best For: Consumer product prototypes, presentation models, decorative parts, and components that need a premium visual finish.
Custom surface textures can be added through the mold or finishing process to improve grip, appearance, or product realism.
Best For: Grips, handles, covers, consumer electronics, and parts that need a molded texture or tactile surface.
Vacuum Casting Applications
Low-Volume Production
Vacuum Casting parts are an ideal choice for low-volume production, particularly well-suited for processing plastic parts ranging from 10 to 1000 pieces. This ensures better consistency and accuracy in product dimensions.
Advanced Prototyping
The Vacuum Casting process utilizes low-cost tooling, making it a more affordable and accessible method for prototype creation. It enables the production of high-quality prototypes using a variety of materials and accommodating design alterations.
Market Testing
Vacuum Casting proves to be the optimal choice for consumer testing, user evaluation, and conceptual modeling. It facilitates the production of prototypes using the same material intended for mass production, thus yielding results comparable to other manufacturing methods.
Quality Assurance & Inspection
We adhere to a strict multi-stage inspection protocol to ensure every part meets your exact specifications.
For more details on our quality standards, check out our Inspection Checklist (including both standard and premium options).
Vacuum/Urethane Casting FAQs
Vacuum Casting can produce high-quality and sturdy parts, with physical properties comparable to Injection Molding and structurally superior to 3D printed parts.
Compared to Injection Molding, Vacuum Casting has lower costs and is the ideal cost-effective method to create small batch parts. Additionally, the turnaround time is faster for Vacuum Casting than Injection Molding. Vacuum Casting molds are much quicker to make than Injection Molding molds, which can be created by 3D Printing or even by hand, significantly shortening lead times.
Vacuum Casting is widely utilized in industries such as aerospace, automobiles, home appliances, toys, and medical devices. It is particularly suitable for the trial production of small batch samples during the development stage of new products.
There’s no MOQ for Unionfab. We offer one-off prototypes and small-batch production. It should be noted that Vacuum Casting is more cost-effective when the quantity is about 5 pieces or more.
The Vacuum Casting molds have a short lifespan, typically around 20 moldings. We will dispose of them when the production is fully completed. If you wish to keep the 3D printed or CNC machined master model, please discuss directly with us.
Related Vacuum Casting Articles
Ready to Start Your Vacuum Casting Project?
Get Vaccum Casting Quote
Unionfab is China's Largest 3D Printing Manufacturing Company for Rapid Prototyping and On-Demand Production Parts.
Copyright Notice 2026 © Unionfab.com All Rights Reserved.
沪ICP备17023219号-3Region: -, Version: 26.09.01
沪ICP备17023219号-3Region: -, Version: 26.09.01
