The Four Core Variables of Plastic in Scientific Injection Molding

There are numerous factors influencing injection molding. If one attempts to control all these factors simultaneously, it would be an extremely massive project requiring the installation of a large number of sensors. Through correlation analysis, we can identify that there are actually four variables closely correlated with the plastic molding process: plastic temperature, plastic flow rate, plastic cooling rate, and plastic pressure. Repeated experiments have shown that products with consistent values of these four plastic variables also exhibit highly consistent quality.

Therefore, when evaluating whether an injection molding process is stable, we need to assess whether the four core variables of plastic are consistent, rather than simply checking if the injection molding machine is stable, if the mold is stable, or if the material properties are stable.

The temperature here refers to the melting temperature of plastic in the viscous flow state. How can we measure this melting temperature? It cannot be directly read from the injection molding machine alone. Think about how to obtain this data! Leave a comment, and you will get the answer!

This refers to the flow speed of plastic, and this data can be directly read from the injection molding machine.

Here, it specifically refers to the pressure of plastic inside the mold, which also cannot be directly read from the injection molding machine. The injection molding machine can only display the injection pressure; however, pressure loss occurs throughout the path from the barrel to the nozzle, then to the runner, and finally to the mold cavity. Therefore, this pressure value needs to be calculated through experiments.

The consistency of the cooling rate can be indirectly determined by measuring the demolding temperature.