APPLICATION CASE / 02
Low-pressure casting mould clamping
Close and clamp the mould, hold pressure, then release for opening and part removal.
China · 重庆志成机械有限公司 (Chongqing Zhicheng Machinery)
- Company-reported electricity saving
- 94.3%
- Holding time
- 100–140 s
- Recorded pressure
- 6.3 MPa
- Production test
- 168 h
Original equipment and duty
The original pump ran continuously with a cooler. The hot casting environment recorded oil temperatures up to 68°C, leakage and monthly repairs. The production cycle was 180 s, including 100–140 s of holding.
Project duty: 100–140 s holding time; 6.3 MPa system pressure.
02 / ON-DEMAND POWER
Power for motion. Less energy during holding.
The retrofit retained the cylinders and valve block without changing the host machine, using a standard motor, PLC pressure feedback and an accumulator. The case scheme removed the original cooler and addressed the high-temperature, dusty environment separately.
- 01
Build pressure
Run the motor for clamping or pressing
- 02
Hold pressure
Stop the motor at the set pressure
- 03
Recharge as needed
Restart at the lower threshold
Test conditions and results
The project test covered 168 hours of continuous production at 34–41°C ambient temperature and 6.3 MPa system pressure, comparing consumption, oil temperature and faults before and after the retrofit.
What changed after the retrofit
Reported electricity saving 94.3%
Case record date: 2025-10-21
Test record and customer feedback
Test duration / ambient temperature / pressure: 168 h · 34–41°C · 6.3 MPa
Oil temperature (before→after): 65 → 40°C
Previously repaired monthly; six months without oil leakage after the retrofit.
Acceptance and a subsequent phased rollout to 12 units.
Customer feedback
Standard parts simplify repairs and reduce downtime losses from oil leakage.
Selection checks for a similar duty
Review ambient conditions, cooling and protection separately. This case pressure exceeds the 4.5 MPa SC-QT table rating and does not establish a direct replacement with those configurations.
Explore the solution for this duty →
Cooler removal, maintenance intervals and energy results relate only to this case record. Confirm heat balance, allowed pressure drop, leakage and duty rating for each new project.