Talk about the things you don't know about buying injection molding machines

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With the rapid development of plastic industry today, injection molding machines play an important role in both quantity and variety. The injection molding machine has the function of molding plastic products with complex appearance, precise size or dense texture with metal inserts at one time, and is widely used in national defense, electromechanical, automobile, transportation, building materials, packaging, agriculture, culture, education, health and people's daily life. The market is full of injection molding machines of various models and different purposes. How to purchase a satisfactory injection molding machine and what should be paid attention to when purchasing injection molding machines have always been a difficult problem for users. Now let's take a look at what we need to pay attention to when purchasing injection molding machines.
Key point 1: technical parameters of injection molding machine. Users can judge by longitudinal or transverse comparison when purchasing injection molding machines. 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 "horizontal" is based on the technical parameters of similar injection molding machines at home and abroad. Therefore, this is a very careful and scientific work. The parameters at all levels of the injection molding machine shall be selected according to the material, shape, structure of the injection molding products and even the application field and specific occasions, according to the structure, quality, accuracy, number of cavities, type of runner and its structure, shape, size, and the automation degree of the production capacity of the day, month, and year of the products.
Key point 2: stability, reliability, safety and service life of the machine. The stability of the machine is mainly reflected in whether the clamping mechanism and injection molding system run smoothly in each cycle, and the noise shall not exceed the industry standard when working in a silent environment without impact. These conditions are related to the manufacturing and assembly accuracy of machinery, as well as the reasonable design and structure of the 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, materials and heat treatment process of the template, pull rod, connecting rod and its pin; The plastic warp system of the injection molding machine, such as the structure and manufacturing process of the barrel, screw, screw head, check ring and the driving spindle of the screw, is the main force bearing part and wear part of the injection molding machine, which directly affects the service life.
Key point 3: safety of injection molding machine. When the mold closing mechanism opens and closes the mold, the reliability of the low-voltage protection system relates to the man-machine safety. The injection molding machine is required to implement a combined safety protection system of electrical, mechanical and hydraulic. This protection mainly reflects two aspects: one is the safety protection of the mold, and the other is the safety protection of the human body. Before mold closing, when the safety door is not closed properly, mold closing shall not be able to act; In the process of mold closing, if the safety door is not closed to the correct position, the template action will stop or the mold will open automatically. When closing the mold, if foreign matters such as inserts fall into the mold cavity by mistake due to vibration or other reasons, or other foreign matters such as starting are placed into the mold by mistake, the mold should stop closing, or open the mold automatically and give an alarm.
Another safety link of the injection molding machine is the prevention of cold start of the pre molded screw. When the material of the screw does not reach the specified temperature and heat preservation time, it is prohibited to start, otherwise an alarm will occur. The protection device of the spray nozzle of the injection molding machine is necessary to prevent scalding.
Key point 4: high automation, complete functions and high production efficiency. Modern injection molding machines can realize manual, semi-automatic and full-automatic operation. As long as the mold design is reasonable, full-automatic operation from injection filling to product ejection and dropping can be realized, or unmanned operation can be realized with a manipulator. The core pulling and inserting function, hydraulic nozzle control function and fast heating flow path probe function can be programmed into the automatic program in the injection molding cycle for automatic circulation. The high production efficiency is mainly reflected in the short molding cycle of each molded part under the normal injection molding process conditions. This reflects the comprehensive performance index of the mechanical, electrical and hydraulic systems of an injection molding machine. Therefore, high-quality hydraulic and electronic components must be used, and precision manufacturing technology must be used to improve the sensitivity and repeatability of the injection molding machine system. This is a reliable guarantee for the efficient work of the injection molding system.
Key point 5: Energy conservation and environmental protection have become an important indicator to judge the quality of injection molding machines. Energy saving mainly reflects the ability of injection molding machine to save water and electricity compared with similar machines when the heating system (electromagnetic heating), power drive system (frequency converter, server, etc.) and heat dissipation system meet the normal process conditions. The theme of "environmental protection" should be fully considered in the design of injection molding machine. The 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 environment-friendly materials.
Key point 6: The machine maintenance and overhaul should be convenient. 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 injection molding machines is also very important for users.
In addition, the production cost, production efficiency, supplier and operability of the injection molding machine should be considered when purchasing the injection molding machine.