Vacuum Process Metal Foundry machine

Located in Qingdao, Shengmei Machinery Co., Ltd. is a professional manufacturer of V-process molding line (and related equipments) , Lost foam casting molding machine line (and related equipments),Resin sand reclamation molding line (and related equipments), Dust removal equipment and sand mixer. We have 7 years of experience in casting molding machinery and have a good reputation in this field. We put good faith and quality first in mind. We sinerely hope to have good cooperation with foundry enterprises with first-class technology, first-class quality, first-class service to create the future.

Vacuum molding (V-process) is a variation of the sand casting process for most

ferrous and non-ferrous metals, in which unboended sand is held in the flask with a vacuum.We can manufacture all kinds of V-processmolding line such as 10t/h sand treating system,30t/h and 60t/h sand treating system.Customized one is available.




1
How the V-process works

Step 1: The pattern(with vent holes) is placed on a hollow carrier plate.

Step 2: A heater softens the .003" to .008" plastic film. Plastic have good elasticity and a high deformation ratio.

Step 3: Softened film drapes over the pattern with 200 to 400 mm Hg vaccum acting through the pattern vents to draw it tightly around the pattern

Step 4: The flask is placed on the film-coated pattern. Flask walls are also a vacuum chamber with the outlet shown at right.

Step 5: The flask is filled with dry, unbonded sand. A slight vibration compacts and to maximum bulk density.

Step 6: A sprue cup is formed and the mold surface leveled. The back of the mold is covered with unheated plastic film.

Step 7: Vacuum is applied to the flask. Atmospheric pressure then hardens the sand. The vacuum is released,pressurized air is introduced into the carrier and the mold is stripped.

Step 8: The cope and drag assembly form a plastic-lined cavity. During pouring,molds are kept under vacuum.

Step 9: After cooling, the vacuum is released and free-flowing sand drops away leaving a clean casting, with no sand lumps. the sand is cooled for re-use.

Features:

1,V-process is known for not requiring a draft because the plastic film has a certain degree of

lubricity and it expand slightly when the vacuum is drawn in the flask.

2,The process has high dimensional accuracy.

3,No moisture related defects, no cost for binders, excellent sand permeability, and no toxic

fumes from burning the binders

4,The pattern does not wear out because the sand does not touch it.

5,Take good use of sand, the material recovery rate is 95%


MAIN EQUIPMENTS
•Vacuum stablized system: Vacuum pump, Vacuum meter, Surge tank, dust removal tank, steam separator
•Molding system: Die shoe, Heater, sand molding box , Vibrating table, Manipulator, Die lifter.
•Sand reclamation system: Sand screen, Elevator, Conveyor,sand flask