Research and development on inducing fully electrical vertical injection molding machine（b）

Date：2014-11-03 13:21:13

2 key technical performance indicators and testing results

Because the motor and ball screw drive, the price is expensive, and theproduction scale is not large, 4~5 times so that the manufacturing cost of all electric vertical injection molding machine to the domestic same sizehydraulic machine. Therefore, the user must on all electric vertical injection molding machine control performance, production efficiency, reliability,energy efficiency and clean and environmental protection put forward higher requirements, so that the investment can be effectively returns,produce better products.

First, the energy saving effect is of course, hydraulic machine all electricvertical injection molding machine and equivalent size comparison, althoughrelated, and the injection molding product specific but, energy saving rates are above 30%.

Second, high reliability, using the induction motor billon magnetic (brushless DC motor) system has higher reliability. This is because the induction motoris an induction type, slip exists, so: 1 billon magnetic motor is more flexible,which enhances the security of the system, is conducive to the protection ofthe mold, the operating personnel and the transmission part does not exist;the permanent magnet rotor demagnetization problem, motor life thanpermanent magnet motor with long, so the control performance of long timealso can be guaranteed. So that the reliability of induction motor system is more.

Third, clean environment, due to no longer use hydraulic components, oilpollution problems do not exist. The noise is greatly reduced, and even reached the mute effect. Of course, on the other hand it also bringsElectrical Pollution (electromagnetic interference) this new problem. Wetake strict measures against interference and filter, at the same time, the use of special advanced inverter, the electrical pollution to a minimum.

Fourth, good control performance, is mainly the velocity, pressure, position control response, accuracy and repeatability. In order to improve the response, specially developed to meet the requirements of the specialinduction frequency conversion motor, uses a special vector inverter;control algorithm developed special injection, pressure and position, the control performance of almost permanent magnetic domestic all electricvertical injection molding machine level.

Fifth, the production efficiency is high, the production efficiency is determined by the maximum running speed and response time. Inductionmotor we designed is of variable frequency speed regulation, can designwith permanent magnet motor equivalent rated speed. Therefore, notproduction efficiency induced by all electric vertical injection molding machine is lower than that of permanent magnetic electric vertical injection molding machine, and because the control system is developed independently, it is possible to develop efficient than domestic permanent magnet electric vertical injection molding machine but also high machine.

3 induction task in the future all electric vertical injection molding machine

The development of all electric injection molding machine induced vertical is only one reason: the current domestic permanent magnet (BLDC)manufacturing and motor control technology, especially the 10kW above,can not meet the requirements of all electric vertical injection molding machine. Therefore, motor and its driving part can only rely on imports, the price and technology for others to learn, the profit space is small, difficult tocompete with Japanese products.

Progress has gradually achieved it can be expected in the future of 3~5a in China in the high power permanent magnet motor and its control technology will be, but the key control components only picked up the pace, difficult toquickly break through.

Therefore, the future trend of all electric injection molding machine inducedvertical should be: induction of all electric vertical injection molding machinemanufacturing of large tonnage, the small tonnage for permanent magnetelectric vertical injection molding machine.

So, on one hand can require more quickly response market, but also inmake up the domestic technical problems at the same time to master the key control technology. More importantly, we can at low cost around 50%,produce with domestic permanent magnet machine all electric vertical injection molding machine performance equivalent to, and thus have a greater profit space.

4 Conclusion

Unique insights and bold vision based control algorithm, using specially designed induction motor control technology, unique, independent development, we developed successfully induced by low cost, high performance electric vertical injection molding machine.

Permanent magnet machine performance is not inferior to the domesticmanufacturers to develop the synchronous full electric vertical injection molding machine, compared with full electric vertical injection molding machine in the usual sense of costs related to electrical is reduced by about 50%.

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