Vacuum Casting
Urethane Casting Services

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Vacuum Casting Services


When looking for precision machining services, if you want to manufacture satisfactory parts, you cannot compromise on quality.

In our CNC machining company, you will find a wide range of precision CNC machining services, experienced experts with extensive experience on how to best handle different projects with 3-, 4- and 5-axis CNC machines. We offer CNC milling, CNC turning, EDM, wire EDM and surface grinding services that can handle all technical aspects of creating prototypes and parts, allowing you to focus on design development and sales.

Advantages of Vacuum Casting

1. Fast turnaround
We can provide up to 20 parts in 15 days or less, depending on part specification and volume.

2. Affordability
Silicone molds are less expensive than the tooling used for injection molding, resulting in low prices.

3. Capable of producing large parts
Depending on the type of equipment used, vacuum casting can to create very large parts.

4. Superior surface finish to injection molding
The vacuum process removes air bubbles and allows the material to capture fine details.

5. Color options
Coloring pigments can be added to the resin for a variety of color options.

6. Repeatability
Silicone molds can be used around 20 times before they need replacing.

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Our Advantages of Precision Machining

Experience

Our engineers have built up rich, deep experience from many previous projects, so they can handle complex and precision parts in several industries without a problem.

Advanced Equipment

We have extensive in-house equipment for both manufacturing and testing. Your parts will be manufactured and inspected with our advanced in-house equipment, including Precision CNC milling, CNC turning, EDM, Hexagon CMM, and Olympus XRF analyzer.

Fast delivery

With dozens of machines and a familiar supply chain, we can quickly take your project from engineering to delivery.

Vacuum Casting FAQ

Why would I choose vacuum casting over injection molding?
Vacuum casting is a more affordable alternative to IM, especially in low volumes. It also offers unique advantages like an excellent surface finish.

Can I make production-quality parts using vacuum casting?
Vacuum casting is best for making visually impressive prototypes, but it can also be used for non-mechanical end-use parts like cases and covers.

What happens to the silicone mold(s)? Can I keep them?
The silicone molds used in vacuum casting have a short lifespan, typically around 20 moldings, so we dispose of them after use.

If you wish to keep the 3D printed or CNC machined master model, talk to us directly.

Common Vacuum Casting Applications

We works with leading manufacturers from different industries to support growing demands and streamline their supply chain. The digitalization of our custom CNC machining services helps more and more manufacturers bring their idea to products.

Prototypes and Parts Delivered Quickly
with 4 Simple Steps

1. Upload Your Files

Upload your design files & tell us important details about your project.
File Formats: STEP, STP, STL
Max. File Size: 8MB

2. Quick Quote for You

Quickly quote you and analyze your prototypes and production parts based on 3D drawings and important requirements.

3. Start Production

Once you accept our quote and place an order, we start working with our team to make your ideas a reality.

4. Receive Your Parts

Once manufactured, your custom parts are delivered quickly and directly to your doorstep.

Vacuum Casting FAQ

Vacuum casting is a manufacturing technology that uses a vacuum to draw liquid casting material into a mold. It differs significantly from injection molding, which pushes liquid material into a mold using a screw. The process of vacuum casting offers significant advantages, and is particularly useful for parts that have undercuts or fine details. The process starts with a master model, which creates using one of its CNC machining centers — though 3D printing can also be used. This master model is then immersed in liquid silicone, which is cured and becomes the mold. Once it has been cut and the master model removed, the silicone mold can be put to use. This stage involves pouring casting resin into the mold, as the vacuum removes bubbles and air pockets to ensure a smooth finish. The resin part is then cured in an oven and removed from the silicone mold after cool down, which can be reused around 20 times. Each cast part is an exact copy of the original master model. It’s a perfect solution for rapid prototyping and making small batches of quality parts.

Step 1:Master building
Masters are 3D solids of your CAD designs. They are usually made by CNC machining or with 3D Printing. Making Master in 40° temperature. After finishing and inspecting the masters, we will move to silicone mold making.

Step 2: Mold making
Casting molds are made from liquid silicone. Half-Fill the casting box with liquid silicone, Heat the casting box until the silicone is fully cured, and then allowed it to cure in an oven for 16 hours. Fill with extra silicone liquid which is also heated & cured. Once dried, the mold is cut open and the master removed.

Step 3: Make the parts
Poured the casting resins into the empty cavity to create a highly accurate copy of the original. It’s even possible to over mold with two or more materials. Silicone molds are typically good for 20 or so copies of the master pattern.

We use high-quality machines for precision CNC milling & turning, precision EDM, precision grinding, and a range of other tools in house, using AC to stabilize the workshop temperature. That, combined with the experience and qualifications of our engineers, as well as rigorous inspection of machines and processes, ensures consistent quality even in the most demanding scenarios.

Up to 20 parts in 15 days or less, depending on the part specification and volumes.

± 0.3% (with a lower limit of ± 0.3 mm on dimensions smaller than 100 mm)

To ensure that the mold is filled properly, a wall thickness of at least 0.75 mm is necessary. For best results, we recommend a wall thickness of at least 1.5 mm.

The size of the mold is limited by the dimensions of the vacuum chamber (1900 x 900 x 750 mm) and by the volume of the product (maximum volume: 10 liters)

Up to 25 copies per mold (depending on the mold’s complexity and the casting materials)

The pigment is added to the liquid polyurethane prior to casting, custom painting, and texture.

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