How Should a Mold Temperature Controller Be Maintained in Winter?
2026-01-20 Page view：
As winter approaches, ambient temperatures drop significantly. Mold temperature controllers operating in cold environments are more prone to issues such as freezing, water leakage, and startup failures. If daily maintenance is neglected, not only can production be affected, but serious equipment damage may also occur. From a practical operator’s perspective, here is how to properly maintain a mold temperature controller during winter.
1. Essential Pre-Startup Checks in Winter
Before starting the machine each day, operators should check whether the ambient temperature is close to or below 0°C. Pay special attention to inlet and outlet hoses for stiffness or frost, and inspect fittings for signs of freezing. Also verify water tank levels and ensure that power cables and control panels are free from moisture. These simple checks take only a few minutes but can prevent many avoidable failures.
2. How to Identify Freezing Before Startup
The biggest winter risk is frozen water inside the piping. Before startup, touch the water hoses—if certain sections feel unusually cold or water cannot circulate, freezing may have occurred. In such cases, never force-start the pump or heating system, as this can easily damage the pump or cause pipes to crack.
3. Correct Startup Procedure in Low-Temperature Environments
Under cold conditions, power on the unit first without starting the pump, and confirm that the control system is functioning properly. Then start the system at low load and allow it to run gradually. For water-type mold temperature controllers, ensure smooth water circulation before slowly increasing the temperature. Never operate at full load immediately after startup.
4. Why Heating Must Be Gradual in Winter
During winter, the temperature difference between the mold and the controller is often large. Rapid heating can cause thermal stress in the mold and lead to leakage, seal aging, or even structural damage. Gradual, step-by-step heating allows both the mold and the equipment to adapt safely and significantly extends service life.
5. Winter Precautions for Water-Type Mold Temperature Controllers
Water-type units require special attention to freeze prevention. If the machine will be shut down for more than four hours, all water inside the mold and controller must be completely drained. Compressed air should be used to blow out any residual water if necessary. For night shifts or weekend shutdowns, never take chances with leftover water.
6. Key Points for Oil-Type Mold Temperature Controllers in Cold Weather
Although oil-type controllers do not freeze, heat transfer oil becomes more viscous at low temperatures. During startup, the oil should be heated before full circulation begins. Avoid running cold oil at high speed, as this increases pump load and may damage seals or internal components.
7.Common Winter Misoperations and Their Consequences
Typical mistakes include shutting down without draining water, force-starting equipment when freezing is present, and heating up too quickly. These issues may not cause immediate failure, but over time they lead to frequent breakdowns, higher maintenance costs, and unstable production.
In summary, winter maintenance of mold temperature controllers comes down to three key principles: slow startup, thorough inspections, and strict freeze prevention. When operators follow these basics, mold temperature controllers can operate reliably and safely throughout the winter season.
