An injection moulding machine is an injection press that moulds plastic into product by the injection moulding process. The machine has an injection and a clamping unit. These systems fall into various categories i.e. hydraulic, mechanical, electrical, or hybrid.
The hydraulic presses were the first ones to perform injection but they are not as precise. The electric press is good for energy and are quieter and accurate. However, to restrain the movement of the clamp, tonnage buildup is essential in mechanical and pneumatic machines. Pneumatic types use the air pressure for building up the tonnage on the clamp side of the machine. But hybrid injection machines also called “Servo-Hydraulic” molding machines use the best features of both hydraulic and electric systems.
How Servo attains energy saving and reduces losses?
Injection moulding machines use molten plastic material to place down into a mold cavity before it dries up. Since the process is quite technically quick and versatile, constant supervision is needed but because the liquidation of the raw material is a controlled process met by desired heating mechanism and temperature management, voltage flux cannot be afforded. There is no chance to operate such a fragile procedure under a fluctuating load. Hence, to ensure that the process is not hampered by irate electricity problems, the best thing is to let a Servo stabilizer do all the working of the current.
Servo technology incorporates rapid current adjustment managed by a control unit which triggers the buck boost feature by rotating the motor in the desired direction and a carbon brush leads the rotation. In comparison with traditional stabilizers which give a voltage variation of +/- 10%, Servo has far the least with just +/- 1% so it is a total security to the machines.
The old transfer technology is still depended on the relay mechanism. A relay changes the output value of voltage to the desired level when the electronic circuit compares the output value with a reference value through a reference voltage source. Any variation in voltage from reference value is corrected by the control circuit that switches the relay to connect a desired taping of the transformer to the output. But this technique is slower and less reliable. Constant heating up of the relay is common by high voltage surge. In fact, their voltage output accuracy comes to ±10 percent only. Secondly relay transformers work for homes but not high end industrial applications.
Since injection molding machines require voltage supply, Servo is the best for them as it uses high output voltage accuracy. It uses a servo motor to enable the voltage correction and the output is quite impressive, typically ±1 percent with input voltage changes up to ± 50 percent which an old transformer system fails to give.
Servo technology is backed by automatic buck boost function. Here voltage flux is quickly managed by the rotating arm resting on a Servo motor. The arm consisting of a carbon brush circulates over the copper winding when triggered by automatic control circuit, thus giving accurate voltage promptly under the buck or boost method.
For overload protection or underload boosting, Servo is a potent mechanism to counter such indifferences in electricity that gives you utmost performance under duress and is no match to any other type of voltage fixing systems for your precise injection molding machines.