The basic structure of the plastic bag making machine includes: a storage device, a stepping device, a frequency conversion device, a bag making device, a heat sealing cutter and a control device. The main features are that the storage device stores the corresponding amount of raw materials, the stepping device drives the raw materials, the frequency conversion device drives the heat sealing cutter, the bag making device makes bags after producing a fixed number of bags, the heat sealing cutter controls its temperature through the thermostat to seal and cut the raw materials, and the control device coordinates all aspects of the action as a whole.
The frequency converter has functions such as automatic torque compensation, slip compensation, and automatic voltage stabilization. In the case of frequent motor start and stop, the motor can be protected to avoid the impact of the starting current on the power grid, and energy saving and consumption reduction can be achieved to a small extent.
The main control process of the plastic bag making machine is as follows:
1. Open the material release switch, and control the storage motor action through the material storage photoelectric control to store quantitative materials.
2. Turn on the heating control switch and heat the hot knife through the thermostat.
3. The stepper motor drives the raw material to move. The white bag sealing and cutting is to determine the stepper motor to stop after a fixed number of steps to achieve fixed length control; the color bag sealing and cutting is to stop the stepper motor after the detection of the corresponding signal by the electric eye to achieve positioning control.
4. After the stepper motor stops, the three-phase asynchronous motor drives the hot knife to seal and cut.
5. After the number of bags set for sealing and cutting is completed, the bag is filled.
