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What two measures are used in rating an injection molding machine?

writer:LI SONG Share

The measures for the evaluation criteria of injection molding machines are: a knowledge system that you need to use when purchasing injection molding machines. The following three evaluation criteria for injection molding machines will help you choose better products. For buyers and users of injection molding machines, they should first know what a good injection molding machine is and what aspects need to be evaluated before they can be reasonably selected and used. The evaluation criteria of injection molding machine should have the following aspects.

Evaluation standard of injection molding machine 1: The technical parameters of injection molding machine should be advanced and reasonable. The user can judge by vertical or horizontal comparison. The so-called "longitudinal" 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 application fields and specific occasions of injection molded products; according to the structure, quality, accuracy, number of cavities, type of runners, and structure, shape, and size of the mold; according to the day, month, and size of the product The annual production capacity and the degree of automation are used to select various parameters of the injection molding machine.

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Evaluation criteria for injection molding machine 2: Stability, reliability, safety and service life of the machine. The stability of the machine is mostly manifested in whether the clamping mechanism and the injection molding system are running smoothly in each cycle, working under noise-free and silent, and the noise must not exceed the industry standard. These conditions are related to the manufacturing and assembly accuracy of the machinery, as well as the reasonable 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 warping system of the injection molding machine such as the barrel The structure and manufacturing process of the screw, screw, screw head, non-return ring, and screw drive spindle are the main stress and wear parts of the injection molding machine, which directly affect the service life. The safety of the injection molding machine is very important. When the mold clamping mechanism opens and closes the mold, the reliability of the low-voltage protection system involves human-machine safety. Modern injection molding machines require the implementation of a combined electrical, mechanical, and hydraulic safety protection system. 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 closing the mold, when the safety door is not closed, the mold closing should not be able to move; in the process of closing the mold, if the safety door is not closed to the correct position, the template action stops or the mold opens automatically. If, during mold closing, foreign objects such as inserts fall into the cavity due to vibration, or other foreign objects are mistakenly inserted into the mold, the mold should stop the mold closing action, or automatically open the mold and give an alarm . Another safety aspect of the injection molding machine is the prevention of cold start of the pre-plastic screw. When the material of the screw does not reach the specified temperature and holding time, it is prohibited to start, otherwise an alarm will occur. A protective device for spraying from the nozzle of the injection molding machine is necessary to prevent burns.

Evaluation criteria for injection molding machines 3: 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, the fully automatic operation from injection molding to ejection and dropping of the product can be realized, and it can also be equipped with a manipulator for unmanned operation. The insert core function, hydraulic nozzle control function and fast heating runner probe function can all be programmed into the automatic program in the injection molding cycle for automatic circulation. High production efficiency is mainly manifested in the short molding cycle of each molded product under normal injection molding process conditions. This reflects the comprehensive performance indicators of 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. The efficient operation of the injection molding system is a reliable guarantee.

The above is the evaluation standard measures used to pay attention to the purchase of plastic machines. For more information, please pay attention to Shanghai LISONG Machinery!

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