We offer Vacuum Casting services to produce high-precision, complex metal parts with fast lead times, from prototyping to full-scale production.
Vacuum Casting is a rapid prototyping process used to create high-quality parts by casting materials in a vacuum environment. The process begins by creating a master model, typically made from a material like wax or resin. This model is then placed into a vacuum chamber, where liquid material, such as polyurethane or silicone, is poured into the mold. The vacuum removes air bubbles, ensuring a high level of detail and precision in the cast part. Once the material cures, the mold is removed, revealing the final part.
Vacuum Casting is ideal for producing prototypes with excellent surface finishes and intricate details. It offers a cost-effective solution for low-volume production, making it widely used in industries like automotive, electronics, and consumer goods.
The first step in vacuum casting is to create a pattern or model of the part. This is typically done using a 3D printing technique (such as SLA or FDM) to build a prototype that matches the final product design.
Once the pattern is ready, it is placed inside a mold box. A silicone rubber mold is then created around the pattern by pouring liquid silicone over it. The mold is left to cure and harden, capturing all the fine details of the pattern.
The silicone mold is placed in a vacuum chamber. The vacuum removes any air bubbles trapped inside the mold, ensuring a flawless surface finish and preventing defects in the final casting.
After the mold has been degassed, the desired casting material (such as polyurethane, resin, or other thermoplastics) is poured into the mold. The material is often mixed with hardeners or colorants to achieve the required properties.
The material is then placed back into the vacuum chamber, where the vacuum ensures that any remaining air is eliminated, allowing the liquid material to fill every cavity of the mold. This results in high precision and excellent surface quality.
After the material has cured, the mold is carefully opened, and the cast part is removed. The final part will have high surface detail, dimensional accuracy, and a smooth finish.
Vacuum casting is perfect for rapid prototyping, producing up to 50 high-quality parts per mold. Ideal for customized or niche products, it offers flexibility in quantities and specifications without the high costs of traditional methods. This allows for quick design iteration and functional testing.
Vacuum casting is also cost-effective for low-volume production, using low-cost tooling to produce small batches of high-quality parts. It’s suitable for functional prototypes and final parts, ensuring precision while keeping production costs low.
At LangHe, we use a variety of polyurethane resins in our vacuum casting process, selected for properties like impact resistance, flexibility, and heat tolerance to meet diverse client needs.
We offer a wide selection of color options for our vacuum casting services, enabling you to match your specific design and branding needs.
| Description | Tolerance Notes |
|---|---|
Distance Dimensions | +/- 0.010” or +/- 0.003” per inch, whichever is larger, is typical. Irregular or overly-thick geometries may cause deviances or deflection due to shrinkage. |
Shrink Mitigation | A shrinkage rate of +0.15% can be expected due to thermal expansion of the liquid, and the response of the flexible mold. |
Surface Quality | Surface finish is externally smoothed to a satin or matte surface. Grow lines may be present on internal or difficult-to-access features. Polishing or custom finishes must be clearly defined and agreed upon at the point of order. |
Feature Definition | Sharp corners and text may appear slightly rounded. |
Size Recommendation | We can offer urethane cast parts as large as 30” (0.762 m) long. |
Send us your product files. Our team will consult with you to ensure your specifications, lead time, and price fit your project needs. We will provide a DFM report for approval before kicking off tooling.
Once your project is kicked off we will build a high-quality die. After the tooling is created we will send out part samples for approval.
Once you are satisfied with our samples, we will produce and deliver the parts as per the contract. Rest assured, LangHe will be responsible for quality control throughout the process and ensure on-time delivery.
LangHe’s vacuum casting serves diverse industries, including medical, robotics, consumer goods, automotive, aerospace, marine, green energy, and industrial, among others, providing high-quality custom parts and solutions with precision manufacturing expertise.
LangHe offers one-stop vacuum casting solutions whether you need a single part, a small batch of prototypes, or mass-production parts.
With cutting-edge equipment and efficient production processes, we deliver your projects 40% faster than other manufacturers, ensuring your projects are completed on time.
Choose from millions of combinations for your custom parts, including material choices, surface finishes, tolerances, markings, and certifications, tailored to meet your specific needs.
Our team is committed to providing outstanding solutions and after-sales support. We take full responsibility for addressing any potential issues to ensure complete customer satisfaction.
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