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In today's rapid development of the plastics industry, injection molding machines occupy an important position in both quantity and variety. The injection molding machine has the function of molding plastic products with complex appearance, accurate size or dense texture with metal inserts at one time. It is widely used in national defense, electromechanical, automobile, transportation, building materials, packaging, agriculture, culture, education and health and people in all areas of daily life. The market is full of injection molding machines of various models and uses. How to choose a satisfactory injection molding machine and what to pay attention to when purchasing an injection molding machine has always been a troubled problem for users. Let's take a look at what to pay attention to when purchasing an injection molding machine.
Users can judge by vertical or horizontal comparison when purchasing an injection molding machine. 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 compared according to the technical parameters of similar injection molding machines at home and abroad. Therefore, this is a very careful scientific work.
The stability of the machine is mostly manifested in whether the clamping mechanism and the injection molding system run smoothly in each cycle, and work in a quiet and silent manner without impact, and the noise should not exceed the industry standard. These situations are related to the mechanical manufacturing and assembly accuracy, as well as the rational design and structure of the toggle link. 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 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 of the driving spindle of the screw and its manufacturing process. These parts are the main stress and wear parts of the injection molding machine, which directly affect the service life.
When the mold clamping mechanism opens and closes the mold, the reliability of the low-voltage protection system involves human-machine safety. The injection molding machine requires the implementation of an electrical, mechanical, and hydraulic joint safety protection system. This protection mainly reflects two aspects: one is the safety protection of the mold, and the other is the personal safety protection. Before closing the mold, when the safety door is not closed properly, 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 action stops or the mold is automatically opened. If foreign objects, such as inserts, fall into the cavity by mistake due to vibration, etc., or other foreign objects, such as hands, are mistakenly placed in the mold when the mold is closed, the mold should stop the mold closing action, or automatically open the mold and alarm.
Modern injection molding machines can realize manual, semi-automatic and fully automatic operation. As long as the mold design is reasonable, it can realize fully automatic operation from injection molding to ejection and dropping of products, and can also be equipped with a manipulator to realize unmanned operation. The core pulling function, the hydraulic nozzle control function and the fast heating runner 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 product under the 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 and sophisticated manufacturing techniques must be used to improve the sensitivity and repeatability of the injection molding machine system. It is a reliable guarantee that the injection molding system works efficiently.
NPC Precision Machinery Co., Ltd is a manufacturer of precision plastic injection molding machine which combine professional R&D, manufacturing and after-sales services. For more information about our machines, please kindly contact us!