In DVP - SS series PLC application in plastic bag making machine

Abstract: this article mainly introduced the DVP - in company SS series PLC and VFDS - M series inverter in the application of heat sealing eagerly bag making machine. Key words: hot sealing eagerly bag making machine, PLC, man-machine interface and frequency converter, stepping motor, a thermostat, the introduction of plastic bags have greatly changed People's Daily life. With demand increasing plastic bags, plastic bag machine bag making machine has a higher level of automation requirements. In recent years, plastic bag making machine with PLC control due to its stable performance, high degree of automation advantages, make its are in the market share increase year by year. Second, the basic requirement of plastic bag making machine plastic bag making machine should implement the white bag sealing and cutting and color bag sealing and cutting two functions. 1, white bag sealing and cutting, seal and cut the material for the same length. 2, bag sealing and cutting of color, pattern material, seal and cut the material the regulation pattern. Figure 1 heat sealing eagerly bag making machine, three solutions: as shown in figure 1, a plastic bag making machine mainly consists of: the loading device, stepping device, frequency conversion device, the device, the whole bag heat sealing of cutter and control device. Main feature is the loading device to store the corresponding number of raw materials, stepping device drives the raw material, the frequency conversion device drives the heat sealing and cutting knife, device for the whole bag in production after a fixed number of bags, the whole bag heat sealing cutter by thermostat to control the temperature to sealing and cutting of raw materials, control the overall coordination of all aspects of action. The system controller adopts in 14 ss11t control. The PLC controller host support input, output at six, eight to 10 KHZ pulse output, belong to the miniature PLC, functions can completely satisfy the requirements of cutting bag machine, economical and practical. Frequency converter used in M series inverter. In M series inverter with automatic compensation, slip torque compensation and automatic voltage regulator, etc. In the case of frequent start-stop motor can effectively protect the motor, avoid starting current impact on grid, at the same time can effectively realize saving energy and reducing consumption. The thermostat used in DTA4848R. Units of the empty appliances have a self-tuning function, temperature error control in 0. Within 1 degree. Main control mode is as follows: 1, make open switch, the loading motor movement through the loading photoelectric control, quantitative material to store. 2, open the heating control switch, hot knife through the thermostat heating. 3, by the movements of the stepper motor drive the raw materials, including white bag sealing and cutting fixed step is to determine the stepper motor go stop to implement fixed-length control; Magic eye detected by color bag sealing and cutting is testing the corresponding signal to stop stepping motor to realize positioning control. 4 stops, stepper motor, three-phase asynchronous motor drive the hot knife for sealing and cutting. 5, when sealing and cutting bag can be set up, on the whole bag. Table definition of PLC terminal equipment working process is as follows: four, summary along with the increasingly fierce market competition, the user for the required products put forward the higher technology and a more reasonable cost performance requirements. Zhong da electric flux provided by the PLC controller and frequency converter with its good performance finished products processing, processing technology and comprehensive performance of the transformation, and has been very widely used in industry.
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