In recent years, the plastic machinery industry has taken industrial transformation and upgrading as the main line, adhered to the path of independent innovation, energy saving and environmental protection, and high-end development, accelerated industry-university-research cooperation, and successively developed and produced a large number of high-efficiency and energy-saving plastic machinery products.

For example, the servo energy-saving plastic injection molding machine launched by the industry can achieve an energy-saving rate of 40% to 80% according to the geometric shape and size of the product, and the energy-saving effect has reached the international advanced level, which is recognized and welcomed by the market.

"with the increasing demand for plastics, the plastic machinery industry has great market potential."

The head of the International suppliers Association of Mould and hardware Plastics Industry believes that from a worldwide point of view, the three major categories of plastic machinery are injection molding machines, extruders / extrusion production lines and blow molding machines, which account for more than 80% of the total output value of plastic machinery. among them, injection molding machines account for more than half of the total of these three types of machinery.

I. injection molding machine.

Injection molding machine is the injection of molten plastic into the mold, cooling is the product.

It has a wide range of uses and varies from plastic to plastic.

Injection molding machine is the most widely used processing machinery in the plastic processing industry, not only a large number of products can be directly produced by injection molding machine, but also the key equipment of injection drawing and blowing process.

Characteristics of control system of injection molding machine:

1.

Adopt advanced computer control of famous factory;

two。.

Self-diagnosis function;

3.

Input data such as pressure, speed, time, stroke and temperature directly.

4.LCD color liquid crystal display.

5.

Centralized lubrication;

6.

Pressure coupled oil circuit saves electricity;

7.24 V DC oil pressure direction valve coil will never be damaged;

8.

Mold cooling water regulating device;

9.M.C.B.

Insurance electrothermal control;

10.

Advanced computer control system, large screen display, interface operation, clean and easy to use;

11.

High precision electronic ruler stroke control, the accuracy can reach ±0.1mm;

twelve。.

Through the use of pressure, oil feedback to improve reproducibility;

13.

Mechanical, electrical, oil pressure triple safety device, in any case can ensure the safety of the operator (PD60-PD148 optional oil pressure);

14.

Through the installation of superior position sensor to improve reproducibility and maneuverability;

15.

The ultra-precision forming is realized by using the control of closed-loop control.

Extruder.

The extruder extrudes the molten plastic through a fixed-shaped extrusion outlet under the action of a screw and cuts it after being water-cooled under the action of a tractor.

It is mainly used for the continuous production of all kinds of products with the same cross section, such as tubes, bars, profiles, etc., and can also be used for plastic modification and granulation.

The basic mechanism of extrusion is simple: a screw rotates in the cylinder and pushes the plastic forward.

The screw is actually a slope or slope wound around the central layer.

The aim is to increase pressure in order to overcome greater resistance.

As far as an extruder is concerned, there are three kinds of resistance that need to be overcome: the friction between the solid particles (feed) against the cylinder wall and the friction between them when the screw rotates in the first few turns (feed area); the adhesion of the melt on the cylinder wall; the internal flow resistance of the melt when it is pushed forward.

According to Luo Baihui, head of the International Mould and hardware plastic Industry suppliers Association, the market demand for high-tech injection molding machines will gradually strengthen.

First, the all-electric, all-hydraulic precision injection molding machine, whose main markets are electronic communications, household appliances, automobiles, etc., the processing conditions are higher, and the precision of the injection molding machine is also improved; second, the hollow injection molding machine, the combined application of a variety of rubber and plastic materials combined with hollow injection molding technology can effectively improve the stress failure of plastic parts in the state of vibration.

Third, a new type of injection molding machine with air-assisted and water-assisted devices, this kind of technology has a large market in the near future, especially for products with higher appearance requirements and longer service life, such as household appliances, cars, buildings and so on.

3. Blow molding machine.

Blow molding is a common method for manufacturing hollow thermoplastic products, and the main products are cylinder film and hollow containers.

The blow molding machine can plasticize the preformed products by heating, and then go into the mold to blow molding, this method is mainly used in the production of high-speed and high-output PET bottles and BOPP bottles, that is, two-step process, blow molding can also be combined with injection molding process to form an integrated injection-pull-blow machine, which is also a common method in the production of containers in PET.

The blow molding process can also be combined with the extrusion process, and the extrusion blow molding equipment can be adapted to a wider range of products, including multilayer composite films and all kinds of polyolefin hollow containers. widely used in the food, pharmaceutical and cosmetic industries.

"the blow molding equipment has the advantages of low price, low energy consumption and strong adaptability, which makes up for the deficiency of injection molding. The molded industrial parts have high integrity, good comprehensive performance, high added value and low cost."

Luo Baihui, head of the International Mould and hardware plastic Industry suppliers Association, believes that although blow molding machines account for the lowest proportion of the three major plastic machines, they will maintain a strong momentum of development in the future and will be the fastest growing model with the most potential for development.