The development of society, the increase of population, and the continuous improvement of people's living standards, now people are enjoying the appeal of life more and more, but such development also brings great pressure to the energy of our country, so energy saving has left a deep impression in our hearts, and everyone is looking for sustainable development. Like the early chemical pump is full hydraulic type, due to the needs of environmental protection and energy saving, as well as the mature application of servo motor and the significant decline in price, in recent years, the full electric thorough chemical pump is more and more, in order to analyze the development trend, I will list the comparative characteristics of this:

1, the full hydraulic chemical pump in the shape of thorough, complex products have many unique advantages, it has developed from the traditional single cylinder filling type, multi cylinder filling type to the current two plate direct pressure type, which is representative of the two plate direct pressure type, but its control technology is difficult, high machining accuracy, hydraulic technology is difficult to master.

2, the all-electric chemical pump has a series of advantages, especially in environmental protection and energy saving advantages, it is reported that the current more advanced all-electric chemical pump power saving can reach 70%, in addition, due to the use of servo motor injection control accuracy is higher, the speed is more stable, but also can be multi-level adjustment. But the full electric chemical pump in the service life is not as good as the full hydraulic chemical pump, and the full hydraulic chemical pump to ensure the accuracy must use a closed-loop control servo valve, and the servo valve is expensive, bring the cost rise.

3, electric - hydraulic chemical pump is a set of hydraulic and electric drive in one of the new chemical pump, it integrates the high performance of the full hydraulic chemical pump and the full electric type of energy saving advantages, the combination of electric - hydraulic chemical pump has become the development direction of chemical pump technology.

In the cost composition of injection products, electricity accounts for a considerable proportion, according to the needs of chemical pump equipment technology, chemical pump pump motor power consumption accounts for the entire equipment power consumption proportion of up to 50 to 65 percent, so there is energy saving potential. The all-electric injection machine has an innate advantage in energy saving effect, but as mentioned above, the high manufacturing cost of this type of machine causes its application scope to be greatly limited. At the same time, it is difficult to develop the technology, which is almost monopolized by Japanese companies. Although HAitai, Donghua and other plastic machine enterprises have launched independent development of all-electric injection molding machines, but the technical reliability of their products still need to be tested by the market. The author thinks: in a short time, the domestic all-electric plastic machine is difficult to compete with the Japanese equipment.

It is an important trend to introduce energy saving technology into general injection molding machine to develop energy saving injection molding machine. This kind of technology mainly includes variable frequency energy saving type, variable pump energy saving type and servo control energy saving type, and the energy saving effect can also reach the range of 30 to 70 percent.