Multi-Stage Vacuum Process
Innovative solutions for reliable and efficient die casting
The purpose of vacuum in a die casting system is to evacuate a given volume of air from the mold cavity and the shot sleeve within the shortest possible period of time. This avoids air inclusions in the castings.
The Pfeiffer Vacuum multi-stage vacuum process is available in Vacu2 and Vacu2 eco versions.
Customer benefits - Vacu²
- For die casting units with a clamping force >750 metric tons
- Recipient concept used ideally matches the requirements of large die casting units
- Quickly and reliably reaches and maintains the desired pressure in the mold cavity during the first stage
- Prevents air inclusions
- Trouble-free, cost-effective operation due to low maintenance costs
- Reduces rejects through reliable process control and high reproducibility
Customer benefits - Vacu² eco
- For die casting units with a clamping force < 750 metric tons
- Highly cost-effective with the great efficiency it offers in terms of suction volume and low energy consumption
- Recipient concept used ideally matches small chamber and mold volumes
- High-resolution 15” Siemens touchscreen display, fully integrated in a compact control cabinet
- Optimized duct volume for evacuating small-volume molds
- Maintenance-friendly system design and high production control through proven and reliable technology
- Optimal cost-performance ratio
Two stages – One system: Exact. Fast. Efficient.
In our Vacu2 multi-stage vacuum process, the shot sleeve and mold cavity are evacuated in two stages.
During the first stage, the air is extracted directly from the shot sleeve via a wide cross-section line. This enables the desired pressure to be quickly achieved in the shot sleeve and mold. In the second evacuation stage, the air is extracted directly from the mold.
The control system processes pressure measurements that are taken in four different locations at different points in time during the casting process into process-relevant data. This allows precise information about the current status of the system. This avoids unnecessary rejects and significantly reduces costs in the die cast processes.