Viscosity is a measure of the strength of a fluid's viscosity.
A fluid with low viscosity is water, while a fluid with high viscosity is honey.
honey is a fluid with high viscosity.
The viscosity of plastics changes with changes in temperature and pressure.
The higher the temperature and pressure, the lower the viscosity and the better the flowability.
In injection molding, heat is applied to the plastic, the plastic is injected, and it cools and solidifies in the mold.
In other words, the hotter the plastic, the longer it takes to cool down, and the lower the production efficiency.
The higher the temperature of the plastic, the longer it takes to cool and the less efficient the production process becomes.
In addition, if high pressure is applied during injection to improve fluidity, stress from the pressure will remain in the molded product.
This can cause distortion and cracking of the molded product.
In actual molding, depending on the mold specifications, the resin often has poor flowability under low temperature/low pressure conditions and is difficult to inject and fill.
In actual molding, depending on the mold specifications, it is often difficult to fill the mold by injection.
Therefore, in order to improve the flow as much as possible, molding is done under high temperature and high pressure conditions.
This is the reality.
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