Automated injection molding machines Boy 55 E and Boy 90 E
Combined Advantages of Two Drive Technologies
The new E series from Dr. Boy GmbH & Co. KG of Neustadt-Fernthal, Germany, aims mainly at improved energy efficiency. These new machines are equipped with servo-electric pump drives. Boy claims this drive technology can achieve energy savings up 50% over fully hydraulic machines. In addition, these machines are 20% quieter and 10% faster in the dry cycle. At Boy, they consider machines equipped with servo-electric drives for both the pump and the screw to be the concept of the future. They are intended to combine the advantages of both hydraulic und electromechanical machines.
The flow rate regulation of a servo-electric driven hydraulic pump is dependent on its speed. When no pumping power is required, the motor shuts off and consumes no energy. When it turns on again, there is no hesitation. Due to the achieved energy saving, there is almost no heat to be dissipated. Only the oil temperature is regulated. The energy efficiency data are claimed to equal those of machines with electromechanical drives, without having to deal with their disadvantages, such as wear and the high costs of investment and replacement parts.
Currently, the Boy 55 E and Boy 90 E automated injection molding machines (holding force: 550 and 900 kN) are equipped with this technology. They cost little more than standard hydraulic machines with variably regulated electric pumps.
Dr. Boy GmbH & Co. KG
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