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Vacuum Casting Services: Precision, Speed, and Versatility for Your Low-Volume Production Needs

At GSG-Tech, we specialize in high-quality vacuum casting services (also known as urethane casting) that bridge the gap between prototyping and full-scale production. Designed for low-volume manufacturing, our vacuum casting solutions deliver production-grade parts with exceptional precision, detailed surface finishes, and material versatility—all at a fraction of the cost and lead time of traditional injection molding. Whether you need functional prototypes, bridge production parts, or small-batch end-use components, our expert team and advanced equipment ensure your project meets the strictest industry standards.

What Is Vacuum Casting?

Vacuum casting is a cost-effective, low-volume manufacturing process that produces high-fidelity plastic and elastomer parts using silicone molds and vacuum-assisted resin infusion. The process begins with a master model—typically created via 3D printing (SLA/DLP) or CNC machining—and uses it to fabricate a flexible silicone mold. Liquid polyurethane (PU) resin (or other specialized materials) is then poured into the mold under vacuum conditions to eliminate air bubbles, ensuring uniform filling and precise replication of even the finest details. Once cured, the mold is opened, and the finished part is removed, trimmed, and finished to your exact specifications.

Ideal for production runs of 10–100 parts, vacuum casting is the perfect solution when you need parts that match the look, feel, and performance of injection-molded components without the high tooling costs and long lead times associated with hard metal molds.

Our Vacuum Casting Capabilities & Advantages

We pride ourselves on delivering vacuum casting services that combine precision, speed, and flexibility to meet the unique needs of every client. Our core capabilities and advantages include:

Exceptional Precision & Detail Replication

With dimensional tolerances as tight as ±0.05 mm (standard) and ±0.02 mm with validation, our vacuum casting process captures intricate details, fine textures, and complex geometries with unmatched accuracy—comparable to injection molding. Whether your part features small features, undercuts, or internal channels, we ensure every detail is replicated flawlessly.

Cost-Effective Low-Volume Production

Silicone molds eliminate the expense of hard metal tooling, making vacuum casting up to 70% more cost-effective than injection molding for small production runs. Our silicone molds typically last 15–25 shots, allowing you to produce small batches of parts without significant upfront investment. This makes vacuum casting ideal for startups, product designers, and businesses looking to minimize risk during product development.

Rapid Turnaround Times

We understand the importance of speed in product development. Our streamlined process allows us to deliver finished parts in as fast as 7 days for most projects—from master model preparation to final finishing. Whether you need prototypes for design validation or bridge production parts to keep your operations on track, we ensure timely delivery without compromising quality.

Wide Material & Finish Options

We offer a comprehensive range of casting materials to simulate the properties of common engineering plastics and elastomers, including:

Rigid resins (ABS-like, PC-like, PP-like): Ideal for structural parts, enclosures, and mechanical components, offering high strength, impact resistance, and dimensional stability.

Flexible resins (rubber-like): Available in Shore A 30–90 hardness, perfect for seals, gaskets, soft-touch components, and parts requiring shock absorption.

Transparent resins: Optical-grade clarity with UV stability options, suitable for lenses, windows, and clear casings.

We also offer custom finishes, including high-gloss, matte, textured, and custom color matching (RAL/Pantone), ensuring your parts meet your exact aesthetic and functional requirements.

Design Flexibility

Unlike traditional manufacturing processes, vacuum casting supports complex geometries, undercuts, and embedded inserts (metals, electronics) in a single step. Our team provides design for manufacturing (DFM) support to optimize your part design for vacuum casting, ensuring manufacturability while preserving your original vision.

Our Vacuum Casting Process

We follow a proven, streamlined process to ensure consistency and quality in every part we produce:

1. Master Model Preparation

We start with your CAD file or existing part to create a high-quality master model using SLA 3D printing (for fine surfaces) or CNC machining (for tight geometry). The master is carefully finished (sanded, polished, primed) in a temperature-controlled environment to ensure every detail is captured in the silicone mold.

2. Silicone Mold Fabrication

The master model is placed in a mold box and encapsulated with liquid silicone. We vacuum-degas the silicone to remove air bubbles, then cure it under controlled heat for optimal tear resistance. After curing, the mold is split along a pre-planned parting line, and the master is removed—leaving a cavity that mirrors the original part’s details and texture.

3. Vacuum Casting & Curing

Two-part polyurethane resin (mixed with optional pigment) is degassed, then poured into the preheated silicone mold under vacuum to eliminate voids. The resin is cured in an oven at controlled temperatures (60–80°C) for 1–4 hours, depending on the material and part size.

4. Post-Processing & Quality Control

After curing, parts are demolded, and excess material (gates, flash) is trimmed. We then perform any required post-processing—such as painting, polishing, or assembly—before conducting rigorous quality control checks to ensure dimensional accuracy, surface quality, and material performance meet your specifications.

Get Started with Your Vacuum Casting Project

Whether you’re developing a new product, need functional prototypes for testing, or require small-batch production parts, our vacuum casting services are tailored to your needs. Contact our team today to discuss your project specifications, request a quote, or learn how we can help you bring your vision to life—fast, affordably, and with unmatched precision.

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Vacuum Casting Services: Precision, Speed, and Versatility for Your Low-Volume Production Needs

GSG-Tech

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