China Injection Molding Machine: Selection Guide

When choosing an injection molding machine, you can distinguish it by comparing it vertically or horizontally. The so-called "vertical" is the main technical parameters of the injection molding machine should meet the industry standard, according to the industry standard review. The so-called "horizontal" is based on the technical parameters of similar injection molding machines at home and abroad for comparison. Therefore, this is a very careful and scientific work.

According to the material, shape, structure and even the field of application and specific occasions of injection molding products, according to the structure, quality, precision, number of cavities, type of runner and its structure, shape and size of the mold, according to the daily, monthly and annual production capacity of the products, the degree of automation, etc. to choose injection molding machine parameters at all levels.

The stability of the machine is mostly manifested in whether the mould closing mechanism and the injection system run smoothly in each cycle, work under the silence without impact, and the noise shall not exceed the industry standard. These situations are related to the mechanical aspects of manufacturing and assembly precision, and also related to the reasonable design of the crank and elbow linkage and its structure.

Reliability and service life are mainly reflected in the rigidity of the system of the mold closing mechanism, and the structure and size of the template, tie rod, connecting rod and its pin, as well as the material and its heat treatment process, etc.; the injection system of the injection molding machine, such as the barrel, screw, screw head, stop collar and the structure of the drive spindle of the screw and its manufacturing process, etc. These parts are the main force and wear parts of the injection molding machine, which directly affect the service life.

The reliability of the low voltage protection system involves the safety of man and machine when the mold closing mechanism is opened and closed. Injection molding machine requires the implementation of electrical, mechanical, hydraulic joint safety protection system, this protection is mainly reflected in two aspects: one is the safety protection of the mold, the other is the safety protection of the person. Before mold closing, when the safety door is not closed, mold closing should not be able to act; during the process of mold closing, if the safety door is not closed to the correct position, the mold plate action will stop or automatically open the mold. If, during mold closing, foreign objects such as inserts fall into the cavity by mistake due to vibration or other foreign objects are embedded in the mold by mistake, the mold should stop the mold closing action or open the mold automatically and alarm.

Another safety aspect of the injection molding machine is the prevention of cold start of the pre-molding 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. Injection molding machine nozzle splash material protection device is necessary to prevent burns.

Modern injection molding machine can realize manual, semi-automatic, fully automatic operation, as long as the mold design is reasonable, it can realize the fully automatic operation from injection filling to product ejection fall, can also be equipped with a robot to achieve unmanned operation. The core extraction function, the hydraulic nozzle control function and the fast heating runner probe function can be programmed into the injection molding cycle to carry out automatic cycles.

High production efficiency is mainly manifested in the short molding cycle for each molded product under normal injection molding process conditions. This is an indicator of the comprehensive performance of the mechanical, electrical and hydraulic systems of an injection molding machine, therefore, it is necessary to use high-quality hydraulic and electronic components and precision manufacturing technology to improve the sensitivity of the injection molding machine system and the repetition accuracy, which is a reliable guarantee of efficient work of the injection molding system.

Energy saving, mainly reflects the injection molding machine in the heating system (electromagnetic heating), power drive system (inverter, server, etc.), heat dissipation system to meet the normal process conditions compared with similar machines, water and electricity saving capacity.

The design of injection molding machine should fully consider the theme of "environmental protection". The injection molding machine should prevent hydraulic oil leakage or excessive noise to create a quiet, noise-free working environment. In addition, the injection molding machine itself should also use more environmentally friendly materials.

Various machines such as mechanical, hydraulic, electronic and electrical components should be installed in a position that is conducive to the maintenance and overhaul of the machine, while the degree of generalization and standardization of the injection molding machine is also very important to the user.