Fuji Inverter HMI and plastic film production lines show their skills – Plastic
I. Introduction HC WIRE: Plastic film blow molding machinery and equipment pull a broad market, such as the film packaging, casing manufacturers, and so on. Main function is to heat to melt raw materials ethylene particles after extrusion, hollow, shape, tension, several cooling process, so that raw material through the pipeline to become hollow film, packaging materials for a variety of occasions. Over the past such equipment mainly imported from abroad, because of high costs and maintenance costs, long maintenance cycle, domestic enterprises have gradually developed and applied in the market, good. Fuji trade for the Beijing Plastic Technology Development Industrial Corporation Selection of man-machine interface for synchronization with Fuji governor, with the inverter drive control for precise, complete control of related equipment and accuracy requirements, the price of same product only Italy one-tenth for the user to create new economic growth point.
2, system control technology The electrical control system consists of three parts: the blast and the feeding system, extruding system, heating plastic granules, multi-step traction and prototyping system
1, blast and charging system System relatively simple process, the main function for the transport of raw materials and hair systems. Fuji inverter can be easily achieved using speed control.
2, plastic extrusion particle heating system
System is mainly material out of all sectors of film temperature and traction control the temperature of the thermostat. Mainly use Fuji PXW5 thermostat temperature control to achieve points.
Fuji temperature controller with a variety of specifications, with self-tuning and fuzzy control, and has various input / output forms and related alarm mode. Three-button panel easy to operate.
3, multi-step traction and prototyping system
This part of the control process for the entire production process the most complex part, the part requires a system constituted by the five inverters, divided into a pull, second pull, pull three, four pull, five pull-part, action is as follows:
A: a slight basis for the speed control of the inverters as the main converter, with the rate of change of production technology, the other four follow the speed transducer for linear trend.
B: 2 pull, pull to the middle of the three over-delivery system, its speed to track a slight proportional to the linear speed, so that film will not be too tight or too loose.
C: 4 pull, pull to stretch the five systems, to track a slight proportional to change. Last shaping and winding.
D: all of the slight adjustment of the ratio of coefficients with process change at any time, each driving a different process parameters required to call.
Third, the system electrical design Based on the above control requirements, the program without PLC control of inverter synchronous cards and full use of Fuji POD set control, communications, data processing and human-machine interface in one of the power of using POD to achieve an integrated linkage frequency inverters 5 and the parameters of conversion, and the corresponding frequency of the inverters, line speed, work focused on current display. And the use of POD in the memory, will store up a variety of parameters, each time you switch depending on production, one-button call parameters.
4, System Composition and Analysis
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