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What should you pay attention to when purchasing a hybrid electric injection molding machine?

Nov 21, 2019

The technical parameters of the injection molding machine for the injection molding machine are available. 

When the user purchases the injection molding machine, it can be judged by vertical or horizontal comparison. The so-called "longitudinal" means that the main technical parameters of the injection molding machine should meet the industry standards and be examined according to 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. According to the material, shape, structure and application field of the injection molded product and the specific occasion; according to the structure, quality, precision, number of cavities, type of flow channel and its structure, shape and size; according to the date, month, and The annual production capacity automation degree, etc. to select the various parameters of the injection molding machine.

The supplier of the choice of injection molding machine is to choose the manufacturer with the service nearby. Because the structure of the injection molding machine is complicated, it is inevitable that there will be no problems. The quick after-sales service is very important. Do not blindly seek low prices when purchasing. The prices of accessories, domestic and imported are very different, so you need to find out what brand of accessories the manufacturer uses. Of course, some accessories you can't see, such as oil seals, bearings, etc., so at this time the popularity of the manufacturer, the credibility is critical.

The choice of injection molding machine models, the two main parameters of the injection molding machine is the injection volume and clamping force. In order to ensure the quality of processed products, the weight of the actual one-piece product should be within 70% of the theoretical injection volume of the machine. Calculate the required clamping force based on the projected area of the product. Pay special attention to the distance between the column of the machine, the mold opening stroke and whether the minimum mold thickness is appropriate for the mold.

The man-machine dialogue capability and operability of the injection molding machine are available. The injection molding machine should make its operation and management more humanized, the operation should be convenient, the display should be clear and easy to understand, and it can be seen at a glance. There are parameters selection, product quality control, mold data storage and automatic reproduction of various parameters, which can quickly diagnose and eliminate faults, reduce material waste in the shortest time, and restore normal operation of the system.

Choose the stability, reliability, safety and service life of the machine work at the point of the injection molding 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, and working under the silent without impact, the noise should not exceed the industry standard. These conditions are related to the mechanical manufacturing and assembly precision, and also to the rational design and structure of the toggle link. Reliability and service life are mainly reflected in the system rigidity of the clamping mechanism, and are related to the structure, size, material and heat treatment process of the formwork, tie rod, connecting rod and its pin; plastic warping system of injection molding machine such as barrel , screw, screw head, check ring and the structure of the drive spindle of the screw and its manufacturing process, these parts are the main force-bearing parts 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 clamping mechanism opens and closes the mold, the reliability of the low-voltage protection system involves man-machine safety. Modern 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 human body. Before closing the mold, when the safety door is not closed, the closed mold should not be able to move; 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 the foreign object, such as an insert, is accidentally dropped into the cavity due to vibration or the like, or other foreign matter such as a hand is inserted, the mold should stop the mold closing action, or automatically open the mold and alarm. 

Another safety link of the injection molding machine is to prevent the cold start of the pre-plastic screw. When the material of the screw does not reach the specified temperature and the holding time, it is forbidden to start, otherwise an alarm will occur. A guard against nozzle spattering of the injection molding machine is required to prevent burns.

The automation of purchasing injection molding machines is high, the functions must be complete and complete, and the production efficiency is high. Modern injection molding machines can be operated manually, semi-automatically and fully automatically. As long as the mold design is reasonable, it can realize the fully automatic operation from injection filling to the ejection of the product. It can also be equipped with a robot to realize unmanned operation. The extraction ferrule 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 cycle. The high production efficiency is mainly manifested in the fact that each molding product has a short molding cycle 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 precise manufacturing techniques can be used to improve the sensitivity and repeatability of the injection molding machine system. It is the reliable guarantee that the injection molding system works efficiently.

The energy saving and environmental protection of the main points of the injection molding machine are the non-negligible indicators for judging the modern injection molding machine. Energy saving mainly reflects the water saving and power saving capabilities of the injection molding machine compared with similar machines under the heating system (electromagnetic heating), power drive system (inverter, servo, etc.) and heat dissipation system. The design of modern injection molding machines should fully consider the theme of “environmental protection”. The injection molding machine should prevent hydraulic oil leakage or excessive noise, and work quietly. In addition, the injection molding machine itself should also use more environmentally friendly materials.

It is convenient to maintain and repair the machine for the main points of the injection molding machine. The installation position of various machines such as machinery, hydraulics, electronics and electrical components should be beneficial to the maintenance and overhaul of the machine. At the same time, the generalization and standardization degree of the injection molding machine are also very important to the users.