Vacuum Moulding / V-Process Casting line / Vacuum sealed molding line
Casting technology
1. The pattern (with vent holes) is placed on a hollow carrier plate.
2. A heater softens the .003" to .008" plastic film. Plastic has good elasticity and a high deformation ratio.
3. Softened film drapes over the pattern with 200 to 400 mm Hg vacuum acting through the pattern vents to draw it tightly around the pattern.
4. The flask is placed on the film-coated pattern. Flask walls are also a vacuum chamber with the outlet shown at right.
5. The flask is filled with dry, unbonded sand. A slight vibration compacts sand to maximum bulk density.
6. A sprue cup is formed and the mold surface leveled. The back of the mold is covered with unheated plastic film.
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.
8. The cope and drag assembly forms a plastic- lined cavity. During pouring, molds are kept under vacuum.
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 reuse.
Applications
Vacuum casting boasts a broad reach due to its versatility and high precision, finding uses in diverse industries.
Such as construction machinery counter weight, petroleum machinery(including crank, reduction case, counterweight), automotive industry(including axle, brake drum), belt pulley, swing bolster, piano plane, manhole cover, high manganese steel lining board, etc.
01020304050607
Technical Specification
| Internal size of molding box (mm) | Molding efficiency (mold/h) | Annual output | Sand processing capacity(t/h) | Products |
| 2000*1400*320/360mm | 8-10 | 1000 | 5 | Rear axde,brake drum,counter weight |
| 1200*1200*250/300mm | 5-7 | 1000 | 5 | Wear resistant seel castings, steel gratings |
| 1200*1200*400/450mm | ||||
| 1200*1200*600/600mm | ||||
| 1600*1250*500/300mm | 6 | 1000 | 5-10 | Single piece and small batch of castings |
| 2800*2000*350/350mm | ||||
| 1750*1600*650/450mm | 5-10 | 1000 | 5-10 | Gray iron castings, counter weight for forklifts,loaders etc |
| 1000*630*150/150mm | 10-15 | 600-1000 | 5 | Stainless steel castings, such as acid resist pump impeller |
| 1000*800*150/150mm | ||||
| 2000*1600*360/310mm | 10 | 30000 | 35-40 | Rear axde for trucks |
| 3100*1900*450/450mm | 20 | 50000 | 50 | Steel castings for railway parts, bottom bolster, side frame |
| 3100*1900*350/550mm |
Features
● Engineers with more than 30 years experiences
● Wide scope of application
● High sand recovery rate and high material utilization
● High surface quality and high casting precision
● Excellent mold consistency and repeatability
● No preparation or sand reclamation needed
● Eco-friendly with good working environment
● High-quality after-sales service
● Multiple patents and licenses
● Custom solution with flexible layouts
● Simple operation and maintenance
Reference
0102030405060708