Vacuum Casting

Low-Volume Production (20-500pcs) | Lead Time: 3 days (incl. mold making)

What Is Vacuum Casting?

Vacuum Casting is a small-batch rapid manufacturing process based on the flexibility and high-precision replication capabilities of silicone materials . Its core principle is to replicate the prototype structure through a silicone mold, and then use vacuum injection technology to cast resin materials to quickly produce replicas that are highly consistent with the prototype.

Compared with traditional steel injection molding, Vacuum Casting does not require high mold opening costs, has a short cycle , and is highly flexible . It is especially suitable for small-batch customized production needs of 50-500 pieces .

Advantages of Vacuum Casting

Vacuum casting uses a 3D printed or machined part as a master pattern to create a silicone mold that provides high-quality short-run parts and is a cost-effective alternative to low-volume injection molding.

01

Low Cost

Cheaper than steel molds—ideal for small batches and complex designs, reducing upfront costs in R&D.

02

High Efficiency

Fast production (1-4 hours per part) enables rapid design iteration and quick market validation.

03

Good Accuracy

±0.20mm/100mm replication precision meets most prototyping and functional testing needs.

01

High Flexibility

Replicates intricate details (e.g., medical/auto parts) with ease, using soft, easy-to-process molds.

02

Batch Consistency

Vacuum degassing ensures uniform quality across all copies, even for fine textures and structures.

03

Wide Application

Cost-effective for industries like 3C electronics, robotics, and medical devices requiring fast customization.

Rapid Vacuum Molding Services

48-Hour Rapid Vacuum Casting · Ideal for Low-Volume Prototyping

Get Started

Vacuum Casting Process Steps

Step 1: Prototype

The prototype is created from the customer’s 3D file using 3D printing or CNC machining.

Step 2: Mold Making

A liquid silicone resin is poured into a casting box and heated until cured.
After 10 hours of oven curing, additional silicone is added and cured again.
Once dry, the mold is cut open, and the master model is removed.

Step 3: Part Production

Casting resin is poured into the cavity to create high-precision parts.
Overmolding (2+ materials) is possible.
Each silicone mold can produce 1~20parts.

Vacuum Casting Technical Specifications

Parameter	Specification
Typical Lead Time	Up to 20 parts within 15 days (depends on part size & volume).
Accuracy	±0.3% (min. ±0.3 mm for dimensions <100 mm).
Minimum Wall Thickness	0.75 mm (required for mold filling).
Maximum Part Size	Recommended: 1.5 mm for optimal results.
	Limited by vacuum chamber: 1900 × 900 × 750 mm.
	Max. volume: 10 liters.
Typical Quantity	Up to 20 parts/mold (varies with complexity & material).
Colors & Finishes	– Pigments mixed into liquid polyurethane before casting.
Colors & Finishes	– Custom painting & textures available.

Common Applications of Vacuum Casting

Design Verification

Proof of Concept

Low-Volume Production

Marketing & Promotion

Trade Show Exhibits

Case Studies

Global Vacuum Casting Service | Fast & Low-Cost