Description of the heat dissipation of the mold by the water mold temperature machine2018-07-03
The temperature of the chiller is generally controlled below 35 °C, while the temperature of the chiller is 45 °C or above. In actual work, even if the oil mold temperature machine is set at 45 °C, as the injection molding machine continuously injects more than one hundred degrees of rubber into the mold, the temperature of the mold will slowly rise to 65. Above °C. Because the oil-operated mold temperature machine is indirect cooling, the heat dissipation speed cannot keep up with the heating rate of the mold.
The temperature of the injection mold is controlled at 45 °C-47 °C, and the molded product is PP material. Before using the oil mold temperature machine, the temperature will gradually rise to about 60 °C to stabilize. I have tried the water temperature of the chiller and the cooling tower, which are too low. After using the water mold temperature machine, the mold temperature can be kept constant within the set value.
Extruder mold, the mold is heated to 180 °C-200 °C at the periphery of the mold, the temperature of the water mold temperature chamber is about 50 °C-60 °C. After using the oil mold temperature machine, the temperature will rise to 75 °C. Constant, also tried to use 15 ° C ice water, the temperature is too low to affect the product. Finally, a water mold temperature machine is used to keep the temperature constant within the set value.
The mold temperature machine has a heating tube, which can be heated naturally without difficulty. However, in terms of heat dissipation, the transport type mold temperature machine is much better than the oil transport type. The reason is that the cooling mode of the water transport type mold temperature machine is direct cooling. That is, when the return water temperature of the mold temperature machine is higher than our set temperature, the water transport type mold temperature machine can directly fill the water at normal temperature or directly add the cooling water, so that the temperature is lowered in a short time, The temperature of the circulating water is constantly constant, while the oil mold temperature machine cannot do this.