Industry | Practical example | Machine cooling | Cooling and temperature control systems
Tool cleaning
Cleaning of 2 different molds at KraussMaffei
Reference project KraussMaffei Technical Center
Task
- Cleaning the cooling circuits of older tools before commissioning
- Individual sewer cleaning to document the flow rate and deposits.
System structure
MCU-20 + decompression box:
Designed here as a mobile unit with integrated water tank and feed pump. The filter deck for holding filter fleece is located in the return (Fig. 1)
Technical data
- To clean: Large tool (Fig. 2) | Small tool (Fig. 3)
- Type and quantity of deposits unknown
- Cleaning devices
- MCU-20 (the optimized successor model is ToolClean, operating panel with pressure and dosing unit)
- Decompression box (successor model is ConnectBox) for wastewater-saving cleaning with recirculation
- Filter fleece: retains solids and prevents discharged particles from returning to the system
Cleaning with the Comprex® process
Implementation
To illustrate this, the cooling channels were cleaned individually and the discharge was documented in each case with a new filter fleece. Fig. 4 shows the respective discharge in the fliter fleece for 6 separate cooling circuits.
Advantages for the operator
- Energy saving, free pipes - less pump capacity
- Reduced water consumption, up to 70%
- Mechanical cleaning without the addition of chemicals, thus reducing disposal costs
- Reduced system downtime, approx. 10% compared to conventional cleaning processes
- Stability and reproducibility in the cooling processes
- Fewer rejects
- Successful solution for compliance with legal regulations, e.g. CO2 sustainability, energy management EN 50001
Result of Comprex® cleaning
Advantages of regular Comprex® cleaning

Deposits mobilized and discharged

Improved hydraulics

Reduced pressure loss

Improved energy efficiency

Increased economic efficiency

Improved performance and process reliability
Cleaning with the Comprex® process
Summary
The cleaning of the two-part injection mold has shown that the loads on individual cooling channels can vary greatly, as evidenced by the deposits on the filter fleece and the measured pressure losses. This has fatal consequences for production operations; deposits and deposits have an insulating effect and reduce heat exchange, which leads to longer cooling times and thus cycle times in the system. This inevitably reduces production output. This also affects the quality of the manufactured products; deviations in the heat exchange are immediately reflected in the dimensional stability and the surface.
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