Injection Molding
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Unstable Mold Temperature Control in High-Density Polyethylene '2079851475616104452
Fenómeno do problema
The mold temperature fluctuates greatly during the production process, and the temperature difference between the cavities is obvious.
Unstable mold temperature leads to product dimensional fluctuations, warpage deformation, and inconsistent appearance, affecting product quality and production efficiency.
Análise das causas
（1）The power of the mold temperature controller is insufficient or the water channel flow is not enough
（2）The design of the mold cooling water channels is unreasonable, and the cooling of various parts is uneven
（3）The cooling water quality is poor, the water channels are scaled and blocked, and the flow decreases
（4）Environmental temperature changes affect the mold temperature control accuracy
（5）The cooling time is set improperly, and the mold temperature has not reached an equilibrium state
Solução
（1）Select a mold temperature controller with sufficient power to ensure the mold temperature is stable within the 30-80°C range
（2）Optimize the mold cooling water channels to ensure uniform cooling of each cavity, with the pipelines arranged symmetrically
（3）Regularly clean the cooling water channels, use soft water or add anti-scaling agents
（4）Install air conditioning in the production environment to control the room temperature at 20-25°C
（5）Fully preheat the mold after startup, and start formal production after 10-20 molding cycles
Conclusão principal
Unstable mold temperature is caused by improper design or maintenance of the cooling system, and needs to be solved from the mold temperature controller, water channel design, and maintenance.
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