Injection molding machine equipment electrical part of the overhaul work mainly includes which

Injection machine is a set of hydraulic, electrical, mechanical and other technologies in one of the equipment, with the maturity and development of various technologies, the combination of the three more closely, so the injection machine preventive maintenance of the work of the hydraulic, electrical and mechanical aspects of the three sub-descriptions. (1 Hydraulic part) (1) Hydraulic oil quantity Insufficient oil quantity will lead to the rise of oil quantity, air is easy to accommodate into the oil and affect the oil quality and the normal work of the hydraulic system, insufficient oil is usually caused by oil leakage or loss during repair, for this reason, we should pay attention to checking whether there is any leakage of the parts in the daily life, and replace the worn out seals as soon as possible, and tighten up the loosened joints, etc., and after repair, we should check the oil quantity of the oil tank, and make up the oil in time.　 (2) hydraulic oil temperature The ideal working temperature of the hydraulic system should be between 45 ℃ ~ 50 ℃, the reason is that the hydraulic system is based on a selected pressure oil viscosity and design, but the viscosity will change with the oil temperature, which in turn affects the system components, such as cylinders, hydraulic valves, etc., is to control the accuracy and response to the sensitivity is reduced for the precision injection molding machine, in particular. At the same time, too high a temperature will accelerate the aging of the seals to make it hardened, cracked; too low a temperature is the processing of energy consumption, so that the operating speed is reduced. Therefore, close attention to the working temperature of the hydraulic oil is very necessary. Oil temperature is too high for a variety of reasons, but attributed to oil failure or cooling system failure. (3) hydraulic oil oil quality One of the important properties of hydraulic oil is its chemical stability, that is, oxidative stability. Oxidation is the most important factor in determining the effective service life of hydraulic oil, oxidation of wood tar, sludge and charcoal residue and other insoluble matter will contaminate the hydraulic system, and increase the wear and tear of the hydraulic components, reduce the various gaps, clogging holes, and ultimately lead to the failure of the hydraulic system. The oxidation rate of hydraulic oil depends on itself and working conditions and other factors, including temperature is one of the main factors. According to the equipment manufacturer recommended, the use of appropriate hydraulic oil, and regularly check the degree of oxidation of the hydraulic oil (from the color of the oil itself to dark and judgment), more than a certain number of hours of work after the initiative to change the oil is absolutely necessary.　 (4) oil filter cleaning oil filter plays the role of clean hydraulic oil, so the oil filter should be cleaned every three months to keep the oil Ga suction pipe unobstructed, and at the same time check whether the oil filter China is damaged. Usually the specification of the filter China shall not be larger than 200 mesh. (5) cooler cleaning cooler should be cleaned every two years, or based on its ability to work whether there is a reduction in the cleaning, cooler internal obstruction or scale will affect the cooling efficiency, cooling water should be selected soft (no minerals) is better. (2. Electrical parts) (1) wire joints check the joints are not tight wire will make the joints position of high temperature or sparks and damage, poor joints will also affect the transmission of signals; contactor joints will be due to the vibration of the electromagnetic action of the more likely to be loosened, so the need to regularly check the position of the wire joints and tighten.　 (2) motor General motor is air-cooled, dust accumulation will cause heat dissipation difficulties, so every year for regular cleaning. Usually installed in the circuit coupled motor overload cutoff, the protection device is adjustable current limit, should be based on the electric power to make the appropriate choice, and once the overload protector start, should be sure to check whether the phase, poor contact or oil temperature is too high before pressing the reset switch back. (3) heat cylinder and thermocouple heat cylinder should be checked regularly to ensure that the fastening can be effective heat transfer, in normal production of heat cylinder starvation burn is not easy to perceive, for this reason, we should pay attention to the work of the thermostat, from which to determine whether the heat cylinder is normal. In addition, the common damage to the heating cylinder is the wire connection, due to poor joints, contact resistance increases, so that the connection of local overheating leads to oxidative damage to the interface.　 (4) electromagnetic contactor due to the electric heating part of the contactor because of the action of the intersection of the number of taught frequently, the rate of loss is also faster, if the main computer control part of the raw melt bonding may cause the heating temperature is out of control, so if you find the contact with the phenomenon of overheating, making loud noises or segmented sparks are very large, it is said that it will be damaged, it should be replaced as soon as possible. (5) computer control part With the application of microcomputer control technology in the injection machine, the microcomputer part and its related auxiliary electronic board of the normal operation of the power supply voltage fluctuations, the temperature and humidity of the working environment, the installation of seismic as well as external high-frequency signal interference have put forward high requirements, to maintain the control box ventilation and cooling with the normal operation of the fan, the use of higher precision power supply voltage stabilizing equipment power supply; try to Reduce the control box by the influence of external vibration (micro-potentiometer is most vulnerable to vibration) are the basic requirements of normal operation, should be effectively solve these problems and regular checks.　 (3. Mechanical parts) (1) template parallelism template parallelism can best reflect the condition of the clamping part of the template is not parallel to the product will make the unqualified and increase the wear and tear of equipment and molds. The parallelism of the template can be initially reflected by the movement of the tail plate during clamping and the appearance of the product, but the exact situation needs to be detected with a percentage meter and other instruments. Template parallelism adjustment should be familiar with the personnel in accordance with the steps, otherwise improper adjustment of the machine more damage. (2) mold thickness adjustment should be used regularly mold thickness adjustment system, the mold thickness from the thickest from the thinnest back and forth once to ensure that the action is smooth, in the long term with the same mold production machine, must carry out this check to avoid failure. (3) Central lubrication system All mechanical activity parts need to have proper lubrication, the central lubrication system is one of the necessary equipment of the current injection molding machine. Central lubrication system should be noted that the amount of oil often check whether to fill, the lubricant used must be clean and free of impurities in order to ensure that all lubrication position of the lubricant supply. When the oil pipe is found to be clogged or leaking, it should be repaired immediately. Most of the mechanical wear and tear is due to lack of lubrication occurs, so we should pay enough attention to the lubrication. (4) Keep the movement smooth movement vibration or not smooth may be due to improper speed adjustment, speed change and time mismatch or mechanical, oil pressure adjustment caused. This kind of vibration will make the mechanical part of the accelerated wear and vibration has been tightened screws, so should be reduced and avoided. (5) Bearing inspection When the bearing part in the work of the strange sound or temperature rise that is to indicate that the bearing has been worn out internally should be promptly inspected or replaced, and re-injected into the lubricating grease.　 (6) Injection system The injection screw, check ring and barrel form the heart part of the injection machine, which determines the quality and efficiency of processing and must be kept in good working condition. First of all, take the necessary measures to prevent non-plastic debris mixed into the plastic material flow, and then attention should be paid to check the screw and barrel, the correct clearance between the non-return ring and barrel, the normal clearance should be able to seal the plastic back and produce the plasticization of the required shear action, when found that the melting action of the melt is slow, molten material with spots and black spots, or the product molding is unstable should be checking the wear and tear of the screw, non-return ring and barrel