- Room 1807, Unit 9, Building 2, Shangxing Commercial Street, Shangde Road, Shangxing Community, Xinqiao Subdistrict, Bao'an District, Shenzhen City, China
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Vacuum Casting Service in China
for Prototypes & Small Batches
10–1000+ Parts, No MOQ.
Injection like Surface Finish.
DFM Feedback Before Production.
Dedicated Project Manager.
ABS, PP, Nylon like and Other Urethane Materials.
Global Delivery - from China to USA, Europe, Oceania and Asia.
Get a Vacuum Casting Quote
Reply within 24 business hours – Files kept confidential.
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Why Work With Our
Vacuum Casting Facility in China?
WJ Prototypes offers vacuum casting from China to worldwide for customers who need high quality plastic parts without investing in expensive metal tooling. Our vacuum casting process is ideal for prototypes and small batch production where speed, cosmetic appearance, and predictable cost are important.
Thousands of components produced for customers in automotive, medical, robotics, consumer electronics, and industrial sectors.
Serving clients in the USA, Canada, Europe, Australia, and Asia with English speaking project engineers.
Quality management processes and IP protection measures to safeguard your designs.
Custom vacuum cast parts from around 10–1000+ pieces with flexible order quantities.
No MOQ
Quality & Precision
Fast Turnaround
Rapid Prototypes
Low-Volume To Mass Production
Global Delivery
Fast turnaround
Master models, silicone molds, and vacuum cast parts can be produced in a matter of days, depending on part complexity and quantity.
Cost effective for low volumes
Vacuum casting does not require hard steel tooling, making it a good option for bridge runs and pre production builds.
Consistent quality
Silicone molds capture fine details and provide repeatable dimensions and surface finish for each casting.
Cosmetic surface finish
Parts can be polished, painted, dyed, or clear coated to achieve near injection molded appearance for show models or functional testing.
Experienced team
Our engineers work with vacuum casting, CNC machining, and 3D printing daily and can help choose the best process for your project.
Looking for a Vacuum Casting Supplier in China?
If you are searching for a vacuum casting supplier, factory, or manufacturer in China, WJ Prototypes can support you from quotation through to delivery. Our facilities in China combines vacuum casting with CNC machining and 3D printing to produce urethane cast parts that match your design and appearance requirements. We work directly with product designers, engineers, buyers, and founders who need reliable low volume manufacturing support in China.
You can send your CAD files and requirements, and our engineering team will review your design, suggest suitable materials, and provide an itemized quote.
How Our Vacuum Casting Process Works
Step 1
Upload CAD & requirements
You share your 3D files (STEP, IGES, STL) along with basic information such as material preference, color, quantity, and target surface finish. Our engineers check manufacturability and provide a quotation with estimated lead time.
Step 2
Master model & silicone tooling
After approval, we create a precision master model using CNC machining or industrial 3D printing. This master is used to make silicone molds under vacuum, capturing fine details and the required geometry.
Step 3
Vacuum casting & finishing
We pour liquid polyurethane into the silicone molds inside a vacuum chamber to minimize bubbles and voids. Once cured, parts are removed, trimmed, and finished based on your specification, such as polishing, painting, clear coating, or dyeing.
Step 4
Inspection & global shipping
Each batch is inspected according to your requirements. Parts are carefully packed and shipped from our facility in China to your location, with tracking information shared after dispatch.
Vacuum Casting Materials & Surface Finishes
Common Material Families
Vacuum casting uses polyurethane and similar casting resins to simulate common engineering plastics. We offer several “ like” material families to match the mechanical and cosmetic needs of your parts, along with multiple surface finishing options.
Material Family
Typical Use Cases
Notes
ABS-like
Housings, enclosures, general prototypes
Rigid, good impact resistance, available in custom Pantone colors.
PP-like
Hinges, clips, snap-fit parts
More flexible, good fatigue resistance, color matching available.
Nylon-like
Functional parts requiring toughness
Higher strength and impact resistance for demanding tests.
Other urethane systems, including clear resins, rubber like materials, and higher temperature options, may be available depending on your needs. Our team can recommend specific choices when we review your project.
Surface Finishes
Not sure which material or finish fits your design? Mention your requirements in the quote form and our engineers will make recommendations.
Clear Coat
Clear coat for transparent or translucent parts that need improved clarity or protection.
Painting
Painting, including soft touch and custom Pantone colors, for enclosure grade parts and show models.
Heat Treatment
Harden and strengthen metal 3D prints with multiple heat treatment options: NADCAP heat treatment, hot isostatic pressing (HIP), solution annealing, and aging.
Dyeing
Dyeing for cost effective solid colors on suitable materials.
Plating
Plating or metallic coatings to achieve a metal like appearance for some prototypes.
Polishing
Polishing to increase gloss and smooth the surface for more cosmetic components.
Decaling
Decaling can be used to add a logo or other graphics to boost cosmetics or function.
Is Vacuum Casting Right for Your Project?
Vacuum casting is a good fit when you need realistic plastic parts in small to medium quantities without building full production tooling. It works well between early prototyping and full scale injection molding.
Typical applications
Appearance models for design reviews, presentations, and customer demonstrations.
Functional prototypes for fit, assembly, and limited performance testing.
Small batch pre production runs before committing to injection mold tooling.
Low volume end use parts where traditional tooling cost would be difficult to justify.
Industries we support
Automotive interior and exterior components such as covers, handles, and housings.
Medical and laboratory device housings and test fixtures.
Consumer electronics and smart home product enclosures.
Robotics, automation, and industrial equipment components.
Share your next project with us to see if vacuum casting is the right process or if another manufacturing option would be better.
Start Your Vacuum Casting Project
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Send your CAD files and basic requirements and our team will provide a vacuum casting quote, estimated lead time, and suggestions on materials and finishing.
Testimonials / Satisfied Customers
D
Dorothy
Buyer at Leading Energy company
WJ Prototypes is Great!
“We’re glad we recently added WJ Prototypes to our AVL. You guys are always quick and friendly and all the Machining jobs we have sent have gone smoothly!”
T
Thomas
Engineer at Robotics Company
Our No.1 source for CNC parts
“We had a time sensitive Sheet Metal enclosure with fairly strict cosmetic requirements. WJ Prototypes came through for us and the parts looked great. The full build turned some heads at our Trade Show!”
M
Marc
Buyer at Electric Car Company
Great prices, lead times, and quality of work
“You guys are one of the easiest job shops I’ve worked with the last 10 years. You are responsive and competitive. We’ve appreciated the awesome work!”
Video Display
Sheet Metal Fabrication
SLA 3D printing
CNC Machining
