German-Japanese machine manufacturer Sumitomo (SHI) Demag Plastics Machinery's Systec series of hydraulic injection moulding machines now generate low noise levels to approximately 60dB with the use of the activeDrive drive concept.
During operation of injection moulding machines, noise generation is unavoidable, but exposure to sound pressure levels of 65dB or more for longer periods can negatively impact employee health.
Ideally, noise level should be less than 60dB in order to boost employee performance.
According to Sumitomo, its Systec series hydraulic injection moulding machines are being installed with electrically adjustable DFEE type control pumps and high-efficiency drive motors.
As a result, the noise level during operation of Systec 210 (2,100kN closing force and 560mm bar width) with standard equipment, touches only 64dB, which is considerably lower than the industry standards of approximately 68dB.
Systec 210 produces even less noise with the use of activeDrive drive concept, which comprises a frequency-controlled high-performance motor and a hydraulic pump.
Dynamic power adjustments to all cycle-dependent requirements enable optimum efficiency, as there is only as much power as required in each cycle sequence, resulting in energy savings of 30%-60% and reduction in noise levels by half.
While all-electric equipment produce much lower noise levels - for instance, the company's IntElect series generates sound level of 59dB - traditionally, hydraulic injection moulding machines emit noise levels of over 70dB.
However, that can be rectified if machine manufacturers make an effort to keep the noise level as low as possible in the development phase.