Description
Vacuum Process Molding:
Filled dry sand(without adhesive,no mixing)in the flask,both sides of flask are covered with plastic film,and evacuated air inside,under a certain vacuum condition sand will lose relative motion,and then forming a mold.
The principle of V-process:
1.Pattern and film heating
1)Fix pattern on the pattern carrier,and drilling holes on the pattern.
2)Heating the film.
3)Cover the heated film on the pattern.
2.Film forming and spraying coating.
Sparying coating on the formed film.
3.Place the flask
1)Keep the pattern carrier under negative pressure.
2)Putting the flask on the pattern which had covered by film and coating.
4.Vibrating and sand filling
1)Keep the pattern carrier under the negative pressure.
2)Filling the dry sand of appropriate mesh into the flask.
3)Vibrating to improve sand density.
5.Covering back film
1)Buldozing the surface of mold.
2)Covering the plastic film on the back of flask.
3)Connected the flask with the vacuum system.
6.Stripping
1)Relieving negative pressure of pattern carrier,pattern lose the attraction of EVA film
2)Stripping,and then molding completed.
7.Assembling flask and pouring
1)Molding the upper part and low part mold inthe same way.
2)Assembling flask with dowel pins,fastening the upper and lower parts.
3)Pouring under negative pressure.
8.Shakingout
1)After cooling for a specific time,relieved negative pressure of flask,sand wikll fall down with cast under normal pressure.
2)Sundries(like waste plastics,iron slag)are sieved from sand,sand will be reused after cooling.
OTHERS:
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Sales: Lina Chen
Tel :+86 13589308133/ +86-532-86239667
Website: kaijiefoundrymachine.en.made-in-china.com
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