Mineral water bottles are usually made of PET and are blow molded from PET mineral water pipe embryos. Mineral water does not have a strong preference for beverages, so whether it is for meetings or receiving guests, our most choice is mineral water. Thus, the demand for mineral water is growing steadily. LISONG is an expert in the production of injection molding machines for PET preforms and is dedicated to producing high-quality injection molding machines.

Choose injection molding machine for PET preform

If you want your injection molding machine to achieve high-efficiency, high-quality, and stable production results, you can choose Injection molding machine for PET preform, which has the advantages of energy saving, environmental protection, high cost performance, excellent competitiveness, and suitable for large-volume and high-quality packaging bottles. Embryo application.

1. On the machine parts, DKM uses a special screw for high-efficiency mixing PET, which significantly increases the speed and injection volume of the melt, reduces the plasticizing temperature and AA value, effectively improves the shrinkage of the product, and improves the transparency.

2. The inner distance of the tie rod of the injection molding machine is designed according to the PET mold, the mold matching is high, and the manipulator is more convenient to take out.

3. The integrated design of piston and piston rod can provide better strength in use.

4. The cylinder design can provide greater injection force and perfect injection of various products.

How to control the barrel temperature of Injection molding machine for PET preform

The temperature control of the barrel of the injection molding machine uses a microcomputer control loop to select a suitable control algorithm to complete the control of the heating jackets outside the barrel of the injection machine. To ensure that the working temperature of each section in the barrel can be maintained within the set range according to the process requirements, precise temperature control is beneficial to improve product quality and the utilization rate of raw materials in precision injection molding, which is a very important indicator.

The temperature control object of the barrel of the injection molding machine is a nonlinear, uncertain, strongly coupled and large hysteresis system, which is one of the control difficulties. For this type of object, there is still a lack of a unified and effective control method, and the conventional PID control method cannot meet the requirements of high-precision injection.

Injection molding machines produce different products, with different pre-molding amounts, different ambient temperatures, and different production cycles, and their barrel temperature object model parameters are different; there is a strong coupling phenomenon between the temperature control of each section of the barrel, and it is necessary to achieve complete Decoupling control is very difficult; in addition, the object is still a large hysteresis system, and conventional control methods will inevitably have large overshoots and oscillations. Therefore, it is necessary to study adaptive temperature control strategies to achieve high-precision temperature control.

In the plastic processing process, temperature control mainly includes the temperature control of the barrel, nozzle and mold. The barrel temperature is the heating temperature of the barrel surface. Because the barrel wall is relatively thick, the selection of the thermocouple detection point is very critical, and the temperature curves at different detection points have large differences. Therefore, two-point parallel detection, that is, setting thermocouples on the surface and the depth of the barrel at the same time, will obtain a relatively stable temperature curve, which is conducive to the accuracy of temperature control.

The nozzle temperature directly affects the shear flow when the melt passes through, and has a great impact on the quality of the product. So, the control accuracy of the nozzle temperature is required to be higher. Mold temperature refers to the surface temperature of the mold cavity in contact with the product, which will significantly affect the mold filling, cooling and pressure holding process.

LISONG is one of the leading wholesale injection molding machine for PET preform wholesaler and manufacturer and supplier and exporter and factory and exporter in China, welcome to buy bulk customized injection molding machine for PET preform, they are for sale now. About more technologies Parameter requirements, please provide your requirements, we design accordingly.