Electromagnetic heating coil how to make? So what's the demand? The attention to what matters? To know how to create electromagnetic heating coil, the first coil to understand two important parameters: the cross-sectional area and inductance. How much is the current resolution cross-sectional area. The greater the power, the greater cross-sectional area, whereas smaller. Generally, the same machine, the lower the inductance of the higher operating frequency. Power also will get higher. On the contrary will be lower. Foshan Ran Zhi electronic goods 2-60KW electromagnetic heating coil parameters selection table is as follows: all the power of digital manipulation of electromagnetic heating coil arguments supporting the power to determine the size of the reference value, then interrupt set coil parameters from the table above, and then determine the shape of the heating load , the size, the size to be produced. For example when heating plastic machinery barrel ,, remove the original coil around the outer layer of the barrel 20-25mm thick cotton insulation, and then hot cloth to live. Note: You can not tie too tight! ! ! Otherwise, the insulation effect is not good. Also good control of cotton insulation thickness, if too thick cotton insulation will affect the normal operation of the electromagnetic heater, it will cause an overcurrent or overheating maintenance maintenance, too thin, and the power will be relatively small, less than the rated power. Demand beautiful words, and then a layer of 0.3mm epoxy boards on the outside (of course it does not have to be able to). Cotton insulation wrapped bread out later will be able to coil up. Elect coil from the table. Best by a long list of first come around. When the wound coil if relatively short barrel, then it is next to the wound. Around the end of the suspension. If the barrel is relatively long, it can be loosely wound, generally, the interval between each turn of the coil itself can not be greater than the diameter. Too loose. Will not cause the machine to work properly! Can estimate based on the length of the barrel at the coil can get around it. Also can be tight around a few times, then every 30-50mm mercy, then tight around a few times, then every 30-50mm mercy approach to wound, to balance the barrel of heating temperature. After the coil manufacturing, lead length of 2-3 meters to reserve mercy (ie electromagnetic heating control with the coil spacing). Can not be too long, too long, it will cause the power and thermal efficiency and reduce damage to the machine. 2, How to choose the size of the electromagnetic heater power? Use in the injection molding machine, drawing machine similar machines, they usually demand original thinking five parameters: the top, the barrel diameter. Second, the length of the barrel. Third, the heating temperature zone (ie measurement points) number. Fourth, each temperature zone length. Fifth, the size of each temperature zone power. It is the separation of each temperature zone first, and then determine each temperature zone after power down, and then based on the length of each temperature zone, and then refer to the table to see the length of the coil to the size of the resolution power. If the barrel is short of power and relatively large, we will be able to choose the half-bridge control device, if the barrel is relatively long and relatively little power, we can use a three-phase 5KW or 8KW mercy, in the injection molding machine, drawing machine similar to the machine when using power can be chosen as 60-70% of the original power of mercy. When the power is relatively large, for example, granulating machine, usually based on the size of the screw to select the size of power. Based on user experience, the choice is usually a single-screw 125mm 40KW manipulator; screw 150mm manipulator choose single or double 30KW 50KW manipulator; when the screw is greater than 160mm, usually with 50KW, 40KW and 30KW to combine a detailed look at the barrel The length and the heating temperature and the quantity to account. Granulator similar models, the power can usually pick and had the power to or greater than 90% when the phase of the original power, ability to ensure the normal discharge and energy efficiency. 3. What is the size of the electromagnetic heating power accounting? Many brothers accounting for electric power is still far from clear that the current times voltage is power, and it is not in. Still depends on the three-phase single-phase operation conditions. On single-phase, China voltage 220V, so power = voltage * current (ie, P = U * I). Formula, U is usually 220V, which is the ambition value, often in the factory voltage instability. So, when its voltage measurement should prevail. About three-phase, Chinese power voltage is 380V, namely the voltage between each two-phase voltage is 380V, when the three work together, there are three ways to account for power: the top, power = 220 * current * 3, formula, Since 220 is a single-phase voltage can be understood as three single-phase voltage together job. Second, power = voltage * current * root phase 3 (ie, P = 380 * 1.732). Usually accounts with the second option. Third, if the user choose the most simple way to directly measure the current, the then current /1.5. That draw power. 4, the heating power of the size of how water demand accounting? Some occasions, users consult to boil water for example, the use of multi-selection of more power. It should be accounted for in the following way: When burned 100 kilograms of water in less than one hour from room heated to 100 degrees, power demand: (100 * 4200 * (100-25)) / 3600 = 8.75KW. Where: 4200 is the specific heat capacity of water is 4200 J / kg, 25 is at room temperature, so that the temperature rises 100-25 75 degrees. 3600 seconds, i.e. 1 hours. When burning one ton of water, at room temperature within 1 hour heated to 100 degrees from the demand power is: (1000 * 4200 * (100-25)) / 3600 = 87.5KW, when demand twice the time, power is divided by 2. And so on. 5, after the discovery of electromagnetic heating device temperature always reach how to deal with? 1), when the injection molding machine similar to small power, some point after the machine temperature almost always means electromagnetic heater. When the power exchange would also still be so great after. Sometimes always confusing, most are not the reason for the small power devices, it is because the PID calculation methods have been temperature control machine output resulting from launch signal is very short, electromagnetic heaters have not had time to work, and broken. So most of the time processing electromagnetic heater suspended status, there is no heating. Then we can recuperate the machine off delay time jobs to reach the temperature requirements. For more ways to look at the instructions (F-03 function) Normally, conditioning for 8-15S. The default is 0S, pay attention, not too much conditioning. Otherwise might overtemperature! ! ! 2), when the granulator similar power, the electromagnetic device after the heater, the temperature of the total reach. Electromagnetic heater has always work, the current is also normal, but the temperature is always stagnant. Typically, a power not big enough. Can be done to increase the practice of power. Determine if the practice of power is not small, and this is caused by the barrel of the information, not the same as when the job is not the same frequency absorption materials are not the same heat. Quiz resonant capacitance should add, let Q value added, high-frequency current progress coil. Allows the barrel to reach a uniform temperature inside and outside the barrel temperature progress. If conditions allow, it can try to replace the barrel. 6, after the discovery of electromagnetic heating device temperature overtemperature how to deal with? Such appearances are mostly injection molding machines, injection molding machines means the number of electromagnetic heaters are more troubling is also more serious, sometimes found that the temperature show jumping, do not hold onto when the temperature can choose several ways to test: top, thermocouple connectors two and a 102P able to eliminate high frequency ceramic capacitors disturbed. Second, check the barrel grounding is not outstanding? Quiz barrel grounding force. Third, be able to look away from the thermocouple coil, reducing disturb. Fourth, the test at high temperature thermocouple cloth wrap, do not let it touch the barrel. Fifth, the test-for a new thermocouple. Sixth, the test center at the injection molding machine control computer type Pai consider adding a filter to reduce the power disturb. 

keywords: Electromagnetic heaters, injection molding machine,