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    Advantages and disadvantages of electromagnetic heating economizer and traditional heating mode of injection molding machine?

    Electromagnetic heating economizer is a kind of equipment that uses the principle of electromagnetic induction to convert electric energy into electromagnetic energy for heating. Firstly, the electromagnetic heating economizer converts 220V and 50 / 60Hz AC into DC, and then converts DC into high-frequency high-voltage power with a frequency of 20-40khz. Because the equipment is made of high-temperature resistant cable, when the high-frequency and high-voltage current with high-speed change passes through the coil, it will produce an alternating magnetic field with high-speed change. When the magnetic force line in the magnetic field passes through the magnetic conductive metal material, it will produce a lot of small eddy currents in the metal body, so that the metal material can heat itself at high speed, Finally, the ideal heating effect is achieved. So, what are the disadvantages of traditional resistance heating and the advantages of high-frequency heating products? Let's follow the injection molding machine Xiaobian to understand it!

    1、 Disadvantages of traditional resistance heating:

    1. Large heat loss

    The special heating method of existing enterprises is wound by resistance wire, which can not only heat the inner and outer sides of the circle, but also transfer the heat on the inner side to the barrel. Therefore, when the external heat is lost to the air, it will lead to direct loss and waste of electric energy.

    2. Ambient temperature rise

    Because most of the heat is lost, the temperature of the surrounding environment increases, especially in summer, which has a great impact on the production environment. Because some on-site working temperatures have exceeded 45 degrees, enterprises have to use air conditioning to reduce the temperature, which leads to a secondary waste of energy.

    3. Short service life and large amount of maintenance

    Because the electric heating tube uses resistance wire for heating, if the heating temperature is as high as about 300 degrees, the thermal lag will be relatively large, and it will not be easy to carry out Jing accurate temperature control, and the resistance wire is very easy to burn out due to high-temperature aging. The service life of common electric heating coils is about half a year, so the maintenance workload is relatively large.

    2、 Advantages of high frequency heating products:

    1. Long life

    The electromagnetic heating coil itself has the characteristics of no heat generation, long service life, no maintenance and replacement cost; Therefore, the heating part mainly adopts the structure of ring cable, so the cable itself will not generate heat, and can withstand the high temperature above 500 ℃, especially the service life can be up to 10 years. At the same time, there is no maintenance, and there is basically no maintenance cost in the later stage.

    2. Safe and reliable

    The outer wall of the barrel is heated by high-frequency electromagnetic action, and the heat is fully utilized without loss. Moreover, the heat is also concentrated in the heating body, and the temperature on the surface of the electromagnetic coil is higher than the room temperature, so it can be safely touched without high temperature protection, which is safe and reliable.

    3. High efficiency and energy saving

    The heating method of internal heat is adopted. Because the molecules in the heating body can directly induce magnetic energy to generate heat, especially the thermal start is very fast, the average preheating time is more than 60% shorter than the heating method of resistance coil, and the thermal efficiency is more than 90%. Therefore, on the basis of the same conditions, it saves 30-70% electricity than the heating of resistance coil, The production efficiency is greatly improved.

    4. Accurate temperature control

    The coil itself has the characteristics of no heating, small thermal block and low thermal inertia, so the temperature of the inner and outer wall of the barrel needs to be consistent, and the real-time and accurate temperature control can significantly improve the product quality and high production efficiency.

    5. Good insulation

    The electromagnetic coil is a special customized high temperature and high voltage resistant cable for winding. It not only has good insulation performance, but also does not need to be in direct contact with the outer wall of the tank, so there will be no leakage, short circuit fault and other problems. It is very safe and worry free.

    6. Improve working environment

    For the injection molding machine modified by electromagnetic heating equipment, the internal heat mode adopted in this process is not only concentrated in the interior of the heating body, but also almost no external heat dissipation. Therefore, the surface temperature of the equipment can be improved so that the human body can touch it. The ambient temperature is reduced from above 100 ℃ when the resistance coil is heated to normal temperature, which greatly improves the working environment of the production site, even improves the enthusiasm of production workers and reduces the ventilation and cooling cost of the plant in summer.