Injection Molding
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Unstable Mold Temperature Control in Polypropylene '2079851475616104452
Fenómeno do problema
The mold temperature fluctuates greatly during production, and the temperature difference between mold cavities is obvious.
Unstable mold temperature causes dimensional fluctuation, warpage deformation, and inconsistent appearance of products, affecting product quality and production efficiency.
Análise das causas
(1) The mold temperature controller power is insufficient or the water channel flow is not enough
(2) The mold cooling water channel design is unreasonable, and the cooling of various parts is uneven
(3) The cooling water quality is poor, and the water channels are scaled and blocked, reducing the flow
(4) Environmental temperature changes affect the mold temperature control precision
(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 range of 40-90°C
(2) Optimize the mold cooling water channels to ensure uniform cooling of each cavity, with pipelines arranged symmetrically
(3) Regularly clean the cooling water channels, using soft water or adding an anti-scaling agent
(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 producing 10-20 mold shots
Conclusão principal
Unstable mold temperature is caused by improper cooling system design or maintenance, and needs to be solved from the mold temperature controller, water channel design, and maintenance.
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