Everything You Need to Know About Vacuum Casting

Vacuum casting is a process that uses suction to remove air bubbles from a mold and fill it with molten metal or other materials. The result is a uniform, high-quality product that can be used for jewelry, dental crowns and bridges, medical devices, art projects and more.

The benefits of vacuum casting include:

Vacuum casting from China is one of the most popular options for making your own resin molds. It’s not a perfect method, but it’s one that’s sure to give you great results. Whether you’re new to vacuum casting or an expert looking to brush up on the basics, we hope this article has been a helpful guide. With it, you’ll be ready to start making resin molds of your own in no time.

Reduced casting costs

– Because the material run into a hollow mold instead of over the top of it, you’ll need less material to cast your part. That means less waste, which helps keep costs down.

Improved tolerances

– Vacuum casting can produce parts with tighter tolerances than other methods since there are fewer variables in the process. This makes it ideal for producing small parts with high precision requirements.

Easier handling

– Vacuum cast parts easily get out without damage because they’re not heated as much as hot poured molds. This makes them easier to handle during production and assembly processes compared to other methods like die casting which require multiple stages for complete cooling before demoulding is possible .

Reduced lead times

– Vacuum casting is a quicker process than other methods of metal casting since it doesn’t require heating the material before pouring. This means that you can get new parts up and running more quickly, which reduces lead times compared to processes like die casting.

Excellent surface quality

Vacuum castings have excellent surface quality because there are no bubbles in it due to its smooth surface finish which results in better appearance compared to gravity die castings where there are many small holes on its surface due to air entrapment during pouring process;

Disadvantages of Vacuum Casting

Vacuum casting is a relatively new process and has some drawbacks that aren’t present in other casting methods. These include:

High initial cost

– Vacuum casting requires an expensive machine to create the necessary vacuum, which can be prohibitively expensive for small businesses.

Limited materials

– Vacuum casting works best with nonferrous metals such as zinc and aluminum. It doesn’t work well with high-temperature metals like steel or iron, or with precious metals like gold and silver because they melt at higher temperatures than most nonferrous metals do.

The most significant drawback of vacuum casting is that the initial setup and design phase can take longer than other processes like investment casting or centrifugal casting. This is because you need to create a model that will be able to withstand the heat necessary for the vacuum process. With lost wax casting, you can use any material — even clay — as long as it can withstand high temperatures while still retaining its shape.

How Does Vacuum Casting Work?

Vacuum casting is often for jewelry and other small objects. It’s also commonly in dentistry, because it can produce molds of teeth with little damage to the original tooth structure.

The vacuum chamber starts out as a block of plaster that’s has a shape of an exact replica of the object you want to cast. You’ll need to make sure that everything is perfectly smooth before you pour in the plaster — any imperfections will ran onto your finished product.

Once your plaster mold is ready, it needs drying out completely before you’re ready to use it for casting. This can take several days or even weeks depending on how hot it gets where you live and how much humidity there is in your house during drying time.

When everything is dry, place your object inside the mold so that it fits comfortably without being able to move around too much. Next step is covering up everything with more plaster at least one inch thick. The plaster should completely cover your object so there’s no chance of anything sticking out or come into air. After it’s dry, remove the mold from around your object and voila! You now have a cast copy of whatever was inside of it.


Vacuum casting offers a unique way of creating molds that can use resin, plaster or other materials. So if you have intereste in learning how to make a plaster cast of a hand or a face, or if you’re looking to create an artistic object in the lab, vacuum casting is an excellent option to explore.

Leave a Reply

Your email address will not be published. Required fields are marked *