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What is Vacuum Casting? Uses and Process

What is Vacuum Casting?

Vacuum casting is a highly efficient process used to make high-quality plastic parts and components. It is a popular choice for prototyping as it allows for the production of multiple copies of an object quickly and with great accuracy. In this article, we will explore the uses of vacuum casting, the process involved, and why it has become such a popular choice for many industries.

What is Vacuum Casting?

Vacuum casting is a process by which moulds are created from silicone rubber using a vacuum chamber. A master model of the desired product is placed in the vacuum chamber and heated until all air bubbles have been removed from within it. Once the air bubbles have been eliminated, liquid silicone rubber is poured into the chamber and allowed to form a mould around the master model. The mould is then carefully removed from the chamber and allowed to harden before use. This method of mould creation allows for accurate replication of complex shapes that may be difficult or impossible to achieve using traditional methods such as injection moulding or 3D printing.

Vacuum Casting Uses

Vacuum casting has many uses across different industries, including automotive, electronics, medical devices, toys, consumer products, aerospace engineering, and many more. It can also be used in rapid prototyping applications where multiple copies of an object need to be produced quickly. The process is often used to test new designs or materials before they are put into mass production so that any potential flaws or design issues can be identified and addressed early on in the process. Additionally, vacuum cast parts can be used as short-run production items when longer runs require more expensive machinery or processes that are not financially feasible at this time.

Vacuum Casting Process

The vacuum casting process consists of several steps that must be followed in order for successful results to be achieved. First, a master model must be created either through 3D printing or CNC machining, depending on what type of part needs to be replicated. Once this master model is ready, it will then be placed in a vacuum chamber where all air bubbles will be removed before pouring liquid silicone rubber into the chamber to form a mould around it. Finally, once the mould has hardened, it can then be carefully removed from the chamber and used to produce multiple copies of the original object through injection moulding or other suitable manufacturing processes.


Vacuum casting offers numerous benefits over traditional manufacturing methods, such as faster lead times due to quick replication capabilities as well as cost savings due to lower tooling costs compared with other processes like injection moulding or 3D printing. Additionally, it allows for complicated shapes and designs that would otherwise not be achievable with traditional methods while still providing excellent detail reproduction quality that rivals even injection moulded parts at a much lower cost per unit than other processes demand. For these reasons (and more), vacuum casting has become increasingly popular among many industries looking for an efficient way to create accurate replicas on demand without breaking their budgets!

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