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07/08

2021

Reasons Affecting The Cooling Rate Of Bi-color Mould

  In the injection molding process of Bi-Color Mould, how to determine the cooling time not only affects the quality of the product but also affects the cost of the product. For production and products, the first thing to consider is to transfer the heat required by the plastic melt injected into the mold cavity to the solid so that it can be taken out of the mold without being deformed. Therefore, the correct estimation of the cooling time becomes the main process parameter that should be determined first in the Bi-Color Mould injection process.

  Reasons affecting the cooling rate of Bi-Color Mould:

  1. Mold material and its cooling method. Plastic furniture molds When it comes to mold materials, including mold core, cavity materials, and template materials, they have a great influence on the cooling rate. The higher the heat transfer coefficient of Bi-Color Mould material, the better the heat transfer effect of the plastic per unit time and the shorter the cooling time.

  2. The design of plastic products is mainly the wall thickness of the plastic products. The greater the thickness of Bi-Color Mould, the longer the cooling time.

  3. Cooling water pipe configuration. The closer the cooling water pipe is to the cavity, the larger the pipe diameter, and the greater the number, the better the cooling effect. The shorter the cooling time, the shorter the flow of coolant. The larger the flow of cooling water, the better the cooling water effect of convective heat exchange.

  Fourth, the choice of plastic refers to the measurement of the rate at which the plastic conducts heat from the heat; the higher the heat transfer coefficient of the plastic, the better the heat transfer effect, or the lower the specific heat of the plastic, the temperature is easy to change, so the heat is easy to dissipate. The better the thermal conductivity, the shorter the time required to cool down.

  5. The nature of the coolant, the viscosity, and the heat transfer coefficient of the coolant also affect the heat transfer effect of the injection molding of Bi-Color Mould products. The lower the viscosity of the coolant, the higher the heat transfer coefficient, and the lower the temperature, the better the cooling effect.

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