Vacuum Casting (V Process) Casting

Vacuum casting process, also called V process casting, Negative pressure casting, V-Process casting or vacuum moulding casting, is different from the typical investment casting due to the technique that is used to create these metal parts. The process begins by lacing a two piece mold in a vacuum chamber. The vacuum then draws the molten metal into the mold.

After molten metal pouring, the casting is solidified and the mold is removed in order to get the final casting part. Here at RMC, we utilize vacuum casting methods to produce metal components that range inweight from a few kilograms up to hundreds of kilograms. Our experience in the vacuum casting method guarantee that we can supply net shape or near net shape parts that require little or no secondary process.

The following metal could be cast by vacuum mould casting:

  • Carbon Steel.
  • Alloy Steel
  • Stainless Steel



Vacuum Casting Patterns

Vacuum Casting Patterns

V Process 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  • The second flak is then placed on top of the sand, and a vacuum draws the sand so that the pattern can be tight and withdrawn.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

  • Easy recovery of the sand because the binders are not used
  • Sand does not require mechanical reconditioning.
  • Good air permeability because there is no water is mixed with sand, therefore less casting defects.
  • More suitable for large scale castings
  • Cost effective, especially for large castings.




China vacuum casting foundry

Molten Metal Pouring


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

Vacuum Casting Parts


Steel Vacuum Castings

Steel Vacuum Castings


Custom V Process Casting

Custom V-Process Castings


V Type Casting Parts

V Process Casting Parts


Vacuum Casting Parts' Applications

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 Type Castings

Applications of V-Process Castings

V-Type Casting Value Added Services

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

Finished Vacuum Castings