Services

vacuum casting

Rapid Model leverages advanced vacuum casting technology to quickly replicate polyurethane castings—similar to
engineering plastics—using silicone molds, making it an ideal choice for functional testing and small-batch prototyping.

Vacuum Casting Center
Vacuum casting equipment
Casting Mold

What is Vacuum Casting?

Vacuum casting, also known as polyurethane casting or silicone molding, is an advanced manufacturing process that uses silicone molds and forms parts by injecting materials under a vacuum environment. It is a low- to medium-volume production method commonly used in rapid prototyping and small batch manufacturing, especially suitable for appearance models, structural test parts, transparent components, and flexible parts.

Our vacuum casting process involves creating a silicone mold from a master pattern, then injecting polyurethane resins under vacuum to produce parts with exceptional dimensional accuracy and surface finish. This method eliminates air bubbles and ensures complete material flow into intricate details.

With over a decade of experience, our team has mastered the art of vacuum casting to deliver parts that meet the most stringent requirements for industries ranging from automotive to medical devices.

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Vacuum Casting Equipment

Our Vacuum Casting Services

Comprehensive solutions tailored to your prototyping and production needs

Rapid Prototyping

Transform your designs into tangible prototypes within days. Our vacuum casting service delivers functional prototypes that accurately represent final production parts.

Ideal for design validation, user testing, and investor presentations.

Low-Volume Production

Bridge the gap between prototyping and mass production. Produce 10-200 identical parts without investing in expensive tooling.

Perfect for market testing, pilot runs, and specialized applications.

Overmolding Solutions

Create multi-material parts with soft-touch surfaces. Our specialized vacuum casting techniques allow for complex geometries and material combinations.

Excellent for ergonomic handles, grips, and consumer products.

Technical Capabilities

Advanced equipment and expertise for superior results

factory equipment

Our factory is equipped with advanced vacuum casting equipment to meet the requirements of your project:

  • Precision Tolerances:±0.15% or ±0.1mm (whichever is greater) on critical dimensions
  • Wall Thickness:0.5mm minimum wall thickness for most materials
  • Part Size:Up to 600 × 600 × 300mm (24" × 24" × 12")
  • Mold Life:15-25 parts per mold depending on complexity

Our experienced team of machinists and engineers ensures that every project is executed with precision and efficiency, meeting the client's quality standards.

Discuss Your Project
Engineer from Rapid Model

Why Choose Our Vacuum Casting?

Key benefits that set our services apart

01
Speed

3-5 day turnaround for most projects, 50% faster than competitors

02
Cost Efficiency

75% cost savings compared to injection molding for quantities under 200 units

03
Surface Quality

Near-injection molding surface finish with Ra 0.8μm achievable

04
Material Variety

100+ material options simulating ABS, PP, PC, rubber, and more

05
Price advantage

we offer factory-direct pricing to make your project more competitive in the market.

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Material Selection

Wide range of polyurethane resins to meet your specific requirements

ABS-like

A material similar to ABS, it features a smooth surface, is easy to sand and paint, and is commonly used in the early stages of product development. It is suitable for producing functional prototypes, structural test parts, and housings.

PP-like

PP-like is a material similar to polypropylene (PP), offering good flexibility, chemical resistance, and fatigue resistance. It is suitable for producing parts with features like bending, snap-fits, It is commonly used for functional testing and low-volume production.

High-Temp

High-Temp is a material with excellent thermal stability, capable of withstanding temperatures up to 120°C or higher. It is suitable for producing engine components, lighting fixtures, electrical housings, or high-temperature test prototypes.

Transparent

Transparent material is a clear material suitable for producing optical components, light covers, transparent housings, and visual test models. It has a clear appearance and is easy to polish, making it ideal for evaluating internal structures or light transmission performance during prototype development.

Rubber-like

Rubber-like is a material that simulates the feel and elasticity of rubber, offering good flexibility and tear resistance. It is suitable for producing seals, anti-slip pads, soft-touch housings, and shock-absorbing components.

Flame Retardant

Flame Retardant is a material with fire-resistant properties that can slow down the spread of flames or self-extinguish in high-temperature or open-flame environments. It is suitable for applications requiring fire protection, enhancing product safety and compliance with industry standards.

Our Vacuum Casting Process

A systematic approach to delivering precision cast components

Master Pattern Creation

3D printed or CNC machined pattern prepared with required surface finish

Silicone Mold Making

Pattern encased in liquid silicone and cured to create flexible mold

Resin Preparation

Selection and degassing of polyurethane resin to eliminate air bubbles

Vacuum Casting

Resin injected into mold under vacuum for perfect replication

Industry Applications

Our vacuum casting solutions serve diverse sectors

Automotive

Functional prototypes of interior components, housings, connectors, and under-hood parts with heat-resistant materials.
Ideal for concept validation and pre-production testing.

Medical Devices

Biocompatible prototypes, surgical instruments, device housings, and ergonomic grips for clinical evaluation.
ISO 13485 compliant processes available.

Consumer Electronics

High-fidelity casings, buttons, and components with precise fit and finish for user testing and design verification.
Excellent for crowdfunding prototypes.

Vacuum casting equipment

Start Your Vacuum Casting Project Today

Get a free quote and design consultation from our manufacturing experts

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Product Cases

Silicone replica is an effective method for small batch production of functional hand boards and plastic parts,
and helps you strike a balance between high-quality production of parts and the shortest delivery time.