Energy saving in plastic injection molding mainly revolves around four aspects: equipment upgrades, process optimization, waste heat recovery, and management improvement.
Servo Drive System: Traditional injection molding machines often use a hydraulic system with an asynchronous motor and a fixed-displacement pump, which is energy-intensive and inefficient. A servo drive system, through closed-loop control, adjusts the motor speed and torque according to actual needs, reducing energy consumption during idling. Data shows that injection molding machines using servo motors can save 30%-50% of energy, especially during low-load stages such as pressure holding and cooling.
Variable Displacement Pump and Electro-hydraulic Hybrid Technology: Variable displacement pumps adjust the displacement to match load requirements, avoiding high-pressure overflow losses. Electro-hydraulic hybrid technology combines servo motors and variable displacement pumps to further optimize energy consumption. For example, a certain brand's electro-hydraulic hybrid injection molding machine reduced unit product energy consumption by 28% and shortened the molding cycle when producing appliance casings.
