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V-Process Casting was developed and patented in Japan in the late 1970’s.
When introduced in 1980’s, A&B Foundry and Machining was one of the leading foundries using V-Process for casting. With three decades, this process not only has been used and accepted in various industries, and also has been proved to be a very cost effective process for high quality and medium-sized / large aluminum castings.
V-Process is a variation of the sand casting process for most ferrous and non-ferrous metals, in which unbonded sand is held in the flask with a vacuum.
A pattern is placed on a hollow carrier plate in advance. We heat a thin plastic film (.003″ to .008″) and place it over the pattern.
When the softened film covers a pattern, a vacuum (200 to 400 mm Hg) draws it tightly around the pattern, which is then surrounded by a flask.
Next, the process uses dry, free-flowing, unbonded sand to fill the special flask set over the film-coated pattern. (*The sand used contains no water or organic binders and is kept under a vacuum during molding.)
After a second sheet of film is placed on the flask, a vacuum draws out the air, and the completed mold is then stripped from the pattern.
Each half of the mold is made in a similar fashion and then casting is poured directly from the furnace into the closed halves.
The mold is held under vacuum to retain its shape. After the mold cools, the vacuum is released and the sand and completed casting falls free.
With over 50 year’s excellent manufacturing experience, A&B provides ISO 9001 quality enclosures to meet our customers’ requirements and superior value for their needs.