Vacuum Casting Gallery

Wood Patterns

Sand Processing Equipment


Sand Cores Making

Sand Processing Equipment


Sand Cores

Sand Processing Equipment


Bottom Flask for Pouring

Sand Processing Equipment


Closing Flasks

Cooling and Solidification


Molten Metal Pouring

Molten Metal Pouring


Cooling and Solidification

Sand Cores


Vacuum Castings

Molten Metal Pouring



Vacuum Casting Parts

Steel Vacuum Castings


Alloy Steel Vacuum Castings

Alloy Steel Vacuum Castings


Custom V Process Casting

Custom V-Process Castings


V Casting Parts

Steel Alloy V Process Casting


Vacuum Casting (V Process) Casting of Alloy Steel and Cast Iron

Vacuum casting process, also called V process casting, V-Process casting or vacuum moulding casting, is one type of dry sand casting and requires the use of air extraction equipment to extract the air inside the casting mold, and then use the pressure difference between the inside and outside of the mold to cover the heated plastic film on the patterns and the templates. The casting mold will become strong enough to withstand the molten metal during casting. After obtaining the vacuum casting mold, fill the sand box with dry sand without binder, and then seal the top surface of the sand mold with the plastic film, followed by vacuum to make the sand firm and tight. After that, remove the mold, put the sand cores, close the mold to make everthing ready for pouring. Finally, the casting is obtained after the molten metal is cooled and solidified.

The following metal could be cast by vacuum mould casting:

  • Carbon Steel: Low Carbon Steel, Medium Carbon Steel, High Carbon Steel
  • Alloy Steel: CrMo Alloy Steel, High Mn Alloy Steel, SiMn Alloy Steel etc
  • Stainless Steel, Duplex Stainless Steel, Precipitation Hardening (PH) Stainless Steel
  • Cast Iron: Grey Cast Iron, Ductile Cast Iron, Malleable Cast Iron etc.




Vacuum Casting Patterns

Vacuum Casting Patterns

V Process (Vacuum) Casting Procedures

  • The pattern is covered tightly by a thin sheet of plastic.
  • A flask is placed over the coated pattern and is filled with dry sand without bind.
  • The second flak is then placed on top of the sand, and a vacuum draws the sand so that the pattern can be tight and withdrawn. Both halves of the mold are made and assembled in this way.
  • During pouring, the mold remains under a vacuum but the casting cavity does not.
  • When the metal has solidified, the vacuum is turned off and the sand falls away, releasing the casting.
  • Vacuum molding produces casting with high-quality detail and dimensional accuracy.
  • It is especially well suited for large, relatively flat castings.






vacuum casting mould

Casting Mould Making




The Advantages of V-Process Casting

  • The vacuum castings have high dimensional accuracy, clear outline and smooth surface.
  • There are no binders, water and additives in the molding sand, which makes the sand processing simple.
  • It is simple to clean the vacuum castings. Less harmful gases are generated during the casting process.
  • The vacuum castings could be used at a wide range of industries. It can be used for single-piece small batch production as well as mass production, especially large and medium-sized castings and thin-walled castings are more suitable for vacuum casting.

China vacuum casting foundry

Molten Metal Pouring


Applications of Vacuum Castings

Parts made by vacuum casting are utilized to cast a wide variety of items, including high quality, high performance industrial parts of complex structures. The application of the vacuum casting parts covers a wide range of industries, in our company they are typically used in the following areas:

  • Rail Trains
  • Heavy Duty Trucks
  • Automotive
  • Construction Equipment
  • Logistics Equipment
  • Agricultural Equipment
  • Hydraulics
  • Engine Systems



Applications of V Process Castings

Applications of V-Process Castings

Value Added Services for Vacuum Castings

There are several reasons to choose RMC as your source for vacuum castings, these include:

  • Engineering team whose members are focusing on metal casting field.
  • Extensive experience with complex geometries parts
  • A broad range of materials, including ferrous and non-ferrous alloys
  • In-house CNC machining capabilities
  • One-stop solutions for castings and secondary process
  • Consistent quality guaranteed and continuous improvement.
  • Teamwork including toolmakers, engineers, foundryman, machinist and production technicians.


Request a quote today on lost wax castings for your precision parts, or contact us for more information.

V process casting components

Cast Iron Vacuum Castings