Plastic flow in the channel is because the viscosity of non-Newtonian plastic varies depending on the temperature.
The flow in the channel with the transition because the plastic flows into the adjacent channel, the surface portion of bare boards will meet low temperature and was solidified. If large injection speed may be regarded as no phase transition line.
The viscosity of the resin depends on the temperature, the flow rate is not the same in the cavity and channels, the flow in the mold is turbulent.
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