The pressure that is put on the tip of the screw to inject molten plastics.
Injection pressure is categorized into the primary pressure (injection pressure) that fills up molten plastics into the mold and the secondary pressure (injection retaining primary, secondary, and tertiary pressure) that avoids sink mark.
The smaller the diameter of the screw, the higher the injection pressure becomes.
The latest molding machines can control the quality of the products by changing the injection speed, injection pressure, and by changing position in each step, because machines can analyze and divide the injection process into several steps.
Injection pressure (kg/) * Injection speed (injection rate) (cc/sec) = Injection output energy (kg.cm/sec)
