PlasticHubs delivers high-quality custom vacuum casting services engineered for precise molding, excellent surface finishes, and fast turnaround. Our vacuum casting process produces consistent, ready-to-use plastic parts with outstanding detail reproduction.
Vacuum casting is a rapid manufacturing method used to create high-quality plastic parts by pouring polyurethane resin into silicone molds under vacuum pressure. This process is ideal for producing accurate prototypes, functional test parts, and low-volume batches that closely resemble injection-molded components.
It supports detailed geometries, smooth surfaces, and a wide range of material properties, from flexible rubber-like elastomers to rigid engineering-grade plastics.
Vacuum casting begins by creating a master model, typically produced via CNC machining or 3D printing. A silicone mold is formed around the master, then resin is poured into the mold under vacuum to eliminate air bubbles and ensure consistent part quality.
Copyright: HLH Rapid
Get instant quotes and quickly order parts with on-demand manufacturing. Our team of experts will work with you for large or complex orders to develop, align, and supervise a manufacturing quality plan from start to finish.
Vacuum casting captures fine details, textures, and complex geometries with a level of precision that closely matches the master model. By removing entrapped air during molding, the process minimizes porosity and ensures dimensional consistency—an essential advantage when a prototype must reflect the final product’s appearance and functional performance.
The process naturally delivers smooth, uniform surfaces with minimal post-processing. Because the silicone molds reproduce even subtle surface patterns, parts often achieve near-production aesthetics straight out of the mold. This makes vacuum casting ideal for visual models, consumer-facing prototypes, and pre-production samples requiring premium finishes.
Vacuum casting supports a wide selection of polyurethane resins engineered to simulate ABS, PP, TPE, PC, and other engineering plastics. This material flexibility enables teams to evaluate mechanical behavior, transparency, temperature resistance, or flexibility using small-batch parts without investing in costly tooling.
The method’s low tooling cost and short lead times make it highly efficient for runs of 10–100 units, bridging the gap between rapid prototyping and full-scale injection molding. Companies can validate designs, perform market tests, or deliver functional end-use parts quickly, without committing to production-grade steel molds.
| Tolerances | +/- 0.05 mm |
| Minimum Wall Thickness | 1.5mm - 2.5mm |
| Maximum Part Size | --- |
| Minimum Part Size | --- |
| Quantity | 20-25 copies per mold |
| Standard Lead Time | Up to 20 parts in 15 business days or less |
| Finishes | Customizable colors and texture |
The table shows why vacuum casting is perfect for production-like prototypes and small runs: it delivers injection-molded quality—sharp details, smooth finishes, custom colors/textures, and real material properties—in just days, not months. Ideal for design validation, functional testing, or market-ready samples without expensive tooling. Get parts that truly impress.
We provide several color options here. For custom surface finishes such as electroplating or polishing, please contact cs@plastichubs.com.
PlasticHubs delivered vacuum-cast parts with impressive accuracy and flawless surfaces. The prototypes looked production-ready right out of the box. – from the United States
We received our low-volume casting parts faster than expected. Dimensional quality and consistency were excellent across all parts. – from the United States
The flexible cast components matched our specifications perfectly. The surface finish and material feel exceeded our expectations. – from the United Kingdom
The team supported our color-matching and finishing needs with great professionalism. Their guidance helped us produce a perfect presentation model. – from France
Our vacuum-cast parts showed excellent finish and no air bubbles. Ideal for our testing stage. – from the United States
Accurate parts, smooth finishes, and professional packaging. Definitely my go-to supplier for small batch plastics. – from the United Kingdom
