Energy-Saving Principles of Servo-Driven Injection Molding Machines and Practical Strategies for Energy Conservation and Consumption Reduction in Factories

Electricity costs represent a core production expense for injection molding factories-particularly for large-scale overseas mass-production facilities-making energy and cost reduction critical to boosting profitability. Compared to traditional hydraulic injection molding machines equipped with fixed-displacement pumps, servo-driven horizontal hydraulic machines offer significant energy-saving advantages, making them the mainstream choice for equipment upgrades in plastic manufacturing plants worldwide.
The core energy-saving principle lies in "on-demand" power output. In traditional models, the motor and oil pump run continuously at full speed, generating substantial wasted energy and heat loss during cooling and standby phases. In contrast, servo-driven machines utilize a closed-loop control system that intelligently adjusts motor speed and hydraulic pressure based on specific process stages-such as mold clamping, injection, holding, and cooling. They automatically reduce speed or enter sleep mode during non-productive intervals, eliminating waste from idling and achieving overall energy savings of over 20%. Additionally, lower operating oil temperatures reduce hydraulic fluid degradation and cooling energy consumption.
Practical, easy-to-implement strategies for factories include: prioritizing the batch replacement of existing units with servo models to standardize equipment; optimizing injection pressure, injection speed, and holding parameters based on material properties to shorten cycle times; standardizing standby and sleep-mode management during mold changes and material delays; and performing regular maintenance on servo motors and hydraulic circuits to ensure optimal energy-efficient operation, thereby achieving high-efficiency mass production and low-consumption maintenance over the long term.