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How to choose injection molding machine

With the rapid development of plastic industry, injection molding machine plays an important role both in quantity and variety. The injection molding machine has the function of forming plastic products with complex shape, dimension * or dense texture with metal inserts in one time, which is widely used in national defense, mechanical and electrical, automobile, transportation, building materials, packaging, agriculture, culture, education, health and people's daily life. The market is full of all kinds of injection molding machines with different models and uses. How to choose a satisfactory injection molding machine and what to pay attention to when purchasing the injection molding machine has always been a difficult problem for users. Let's take a look at what we need to pay attention to when purchasing injection molding machines.
 
 
 
Key points of purchase of injection molding machine 1: technical parameters of injection molding machine. Users can choose injection molding machine by vertical or horizontal comparison. The so-called "vertical" means that the main technical parameters of the injection molding machine should meet the industry standards and be examined according to the industry standards. The so-called "transverse" is based on the technical parameters of similar injection molding machines at home and abroad. Therefore, this is a very careful scientific work. According to the material, shape, structure and application fields and specific occasions of the injection molding products, according to the structure, quality, accuracy, number of cavities, type of flow channel and its structure, shape, size of the mold, and according to the production capacity automation degree of the day, month and year of the products, the parameters at all levels of the injection molding machine shall be selected.
 
 
 
The second key point of purchase of injection molding machine is the stability, reliability, safety and service life of the machine. The stability of the machine is mainly reflected in whether the closing mechanism and injection molding system operate smoothly in each cycle, and operate in a silent environment without impact. The noise shall not exceed the industry standard. These conditions are related to the manufacturing and assembly accuracy of machinery, as well as the reasonable design and structure of elbow connecting rod. The reliability and service life are mainly reflected in the system rigidity of the clamping mechanism, which is related to the structure, size, material and heat treatment process of the formwork, pull rod, connecting rod and its pin shaft; the plastic economy system of the injection molding machine, such as the structure and manufacturing process of the driving spindle of the barrel, screw, screw head, check ring and screw rod, which are the main force-bearing parts of the injection molding machine Wear parts directly affect the service life.
 
 
 
Three key points of purchasing injection molding machine: safety of injection molding machine. The reliability of the low-voltage protection system is related to human-machine safety when the mold closing mechanism opens and closes the mold. Injection molding machine requires the implementation of electrical, mechanical, hydraulic joint safety protection system, which mainly embodies two aspects: one is the safety protection of mold, the other is the safety protection of human body. Before closing the formwork, when the safety door is not closed properly, the formwork shall not act; in the process of closing the formwork, if the safety door is not closed to the correct position, the formwork will stop or open the formwork automatically. If the foreign matters, such as inserts, fall into the mold cavity by mistake due to vibration or other foreign matters, are placed into the mold by mistake, the mold shall stop closing the mold, or open the mold automatically and give an alarm.
 
 
 
Another safety link of the injection molding machine is to prevent the cold start of the preformed screw. When the screw material does not reach the specified temperature and holding time, it is forbidden to start, otherwise an alarm will occur. The protection device for the spray nozzle of injection molding machine is necessary to prevent scalding.
 
 
 
Four key points of purchase of injection molding machine: high degree of automation, complete functions and high production efficiency. Modern injection molding machine can realize manual, semi-automatic and full-automatic operation. As long as the mold design is reasonable, it can realize full-automatic operation from injection filling to product top dropping, and it can also be equipped with a manipulator to realize unmanned operation. The core pulling and inserting function, the hydraulic nozzle control function and the fast heating channel probe function can be programmed into the automatic program in the injection molding cycle for automatic circulation. High production efficiency is mainly reflected in the short molding cycle of each molding product under normal injection molding process conditions. It reflects the comprehensive performance index of mechanical, electrical and hydraulic system of an injection molding machine. Therefore, high-quality hydraulic and electronic components and precise manufacturing technology must be used to improve the sensitivity and repeated accuracy of the injection molding machine system, which is a reliable guarantee for the efficient work of the injection molding system.
 
 
 
Five key points of purchasing injection molding machine: energy saving and environmental protection is an important index to judge the quality of injection molding machine. Energy saving mainly reflects the water-saving and power-saving capacity of injection molding machine compared with similar machines under normal process conditions, such as heating system (electromagnetic heating), power drive system (frequency converter, servo, etc.) and heat dissipation system. The theme of "environmental protection" should be fully considered in the design of injection molding machine. Injection molding machine shall prevent hydraulic oil leakage or excessive noise to create a quiet and noise free working environment. In addition, the injection molding machine itself should also use more environmentally friendly materials.
 
 
 
Six key points of purchase of injection molding machine: convenient machine maintenance and repair. The installation position of various machines, such as mechanical, hydraulic, electronic and electrical components, should be conducive to the maintenance and repair of the machine. At the same time, the degree of generalization and standardization of the injection molding machine is also very important for users.
 
 
 
In addition, the production cost, production efficiency, supplier and operability of injection molding machine should be considered when purchasing injection molding machine.
 
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