What is the Crusher Parts Vacuum Process Casting ?

Crusher Parts V-Process Casting

What is V process casting?

The V-Process is an innovative and agile manufacturing process that allows for flexibility and superior castings. It is a form of sand casting but unlike other sand processes that use coarse sand held in shape with a binder, the V-Process utilizes very fine, dry sand and no binders.

What is V-Process Casting Step？

1. Select the model and place the desired pattern on a hollow template. There are many vent holes on the pattern. Under the action of vacuum, these holes can make the plastic film tightly adhere to the pattern.

2. Film heating: use a heater to heat and soften the plastic film with high stretch rate and high plastic deformation rate. The heating temperature is generally between 80 and 120°C.

3. Film forming: Cover the softened film on the surface of the model, through the air hole, under the vacuum suction force of 200 ~ 400mmHg, make the film close to the surface of the model.

4. Put the sand box: Put the V method casting special sand box on the model covered with film.

5. Sanding and tapping: Add dry sand with a better filling efficiency and a particle size of 100-200 mesh into the sand box to make the sand compact to a higher density.

6. Cover mold: Open the sprue cup, smooth the surface of the sand layer, and cover the sand box with plastic film.

7. Mold ejection: Vacuum the flask with the help of the film covering the surface of the V method casting flask, and then use atmospheric pressure to harden the mold. When the mold is ejected, the vacuum of the negative pressure box is released, thereby removing the adsorption force of the template to the film, and then the top box is ejected to complete a mold.

8. Closed box pouring: Before closing the box, the core and cold iron can be lowered according to the process requirements, and the upper and lower boxes can be combined to form a casting mold with a pouring riser and a cavity, which is poured under vacuum.

Advantages of V-Process Casting

● Castings have high dimensional accuracy, clear contours and smooth surface.

● The surface of the mold cavity is covered with plastic film, and the mold surface is smooth and flawless.

● The pressure difference between the inside and outside of the sand mold makes the hardness of each part of the sand mold uniform and high (above 85).

● The sand box is easy to mold, and the draft angle is small (0～-1°).

● The cavity is not easily deformed under the heat of molten metal.

● During pouring, since the sand box is kept in a vacuum state, it is helpful for the molten metal to fill the cavity.

Hyton Casting Crusher Parts Use V-Process Casting