Today, with the rapid development of the plastics industry, injection molding machines play an important role in both quantity and variety. Injection molding machines have the function of forming plastic products with complex shapes, precise dimensions, or dense textures with metal inserts at one time. They are widely used in national defense, electromechanical, automobiles, transportation, building materials, packaging, agriculture, culture, education, health, and people's daily life in all areas. The market is full of injection molding machines of various models and purposes, but how to choose a satisfactory injection molding machine and what to pay attention to when purchasing an injection molding machine have always been troublesome problems for users. Let's take a look at what you need to pay attention to when purchasing an injection molding machine.
Selection point one: the technical parameters of the injection molding machine. When users purchase injection molding machines, they can judge through vertical or horizontal comparison. The so-called "vertical" means that the main technical parameters of the injection molding machine should meet industry standards and be reviewed according to industry standards. The so-called "horizontal" is to compare 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 even the application field and specific occasion of the injection molded product, according to the structure, quality, precision, number of cavities, type of flow channel and its structure, shape, size of the mold, according to the date, month, The annual production capacity automation degree is used to select the parameters of injection molding machines at all levels.
The second point of purchase: is the stability, reliability, safety, and service life of the machine. The stability of the machine is mostly reflected in whether the mold clamping mechanism and injection molding system run smoothly in each cycle, work in a quiet environment without impact, and the noise must not exceed the industry standard. These conditions are related to the manufacturing and assembly accuracy of machinery, and also related to the reasonable design and structure of the toggle link. Reliability and service life are mainly reflected in the system rigidity of the mold clamping mechanism, which is related to the structure, size, material, and heat treatment process of the template, tie rod, connecting rod, and its pin shaft; the plastic warp system of the injection molding machine such as the barrel, screw, screw head, non-return ring, and the structure and manufacturing process of the screw drive spindle, etc. These parts are the main force-bearing parts and wear parts of the injection molding machine, which directly affect the service life.
The third point of purchase: is the safety of the injection molding machine. When the clamping mechanism opens and closes the mold, the reliability of the low-voltage protection system involves human-machine safety. Injection molding machines require the implementation of electrical, mechanical, and hydraulic joint safety protection systems. This protection mainly reflects two aspects: one is the safety protection of the mold, and the other is the safety protection of the person. Before the mold is closed, when the safety door is not closed, the mold closing should not be able to act; during the mold closing process, if the safety door is not closed to the correct position, the template movement will stop or the mold will be opened automatically. If, when closing the mold, foreign objects such as inserts fall into the cavity by mistake due to vibration, or other foreign objects, such as hands, are placed in the mold by mistake, the mold should 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 pre-molded screw. When the material of the screw does not reach the specified temperature and holding time, it is forbidden to start, otherwise, an alarm will occur. A protective device for splashing material from the nozzle of the injection molding machine is required to prevent burns.
Purchase point four: high degree of automation, complete functions, and high production efficiency. Modern injection molding machines can be operated manually, semi-automatically, and fully automatically. As long as the mold design is reasonable, fully automatic operation from injection filling to product ejection and drop can be realized, and manipulators can also be equipped to realize unmanned operation. The function of pulling out the core, hydraulic nozzle control function, and rapid heating runner probe function can be programmed into the automation program in the injection molding cycle for the automatic cycle. The high production efficiency is mainly manifested in the short molding cycle of each molded product under normal injection molding process conditions. This is a comprehensive performance index reflecting the mechanical, electrical, and hydraulic systems of an injection molding machine. Therefore, high-quality hydraulic and electronic components must be used, and sophisticated manufacturing technology can be used to improve the sensitivity and repeatability of the injection molding machine system. It is a reliable guarantee for the efficient operation of the injection molding system.
Purchase point 5: Energy saving and environmental protection are already important indicators for judging the pros and cons of injection molding machines. Energy saving mainly reflects the water-saving and power-saving capabilities of the injection molding machine compared with similar machines when the heating system (electromagnetic heating), power drive system (inverter, server, etc.), and heat dissipation system meet normal process conditions. Injection molding machine design should fully consider the theme of "environmental protection". The injection molding machine should 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.
Purchase point six: Machine maintenance and repair should be convenient. The installation positions of various machines such as mechanical, hydraulic, electronic, and electrical components should be conducive to the maintenance and repair of the machines. At the same time, the generalization and standardization of injection molding machines are also very important to users.
In addition, the production cost, production efficiency, suppliers, and operability of the injection molding machine are all things that should be considered when purchasing an injection molding machine.
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