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Structure principle and precautions of meltblown non-woven production line

by:XINYU Non-woven     2022-01-20

Melt-blown non-woven fabric is different from traditional spunbond production. It uses high-speed hot air to stretch the polymer trickle from the spinneret hole of the module, which becomes a super The fine short fibers are guided to the roller and cooled by their own adhesive force to form.

Its production process is a flow process, from the unloading and unloading of polymer materials, to the melting and extrusion of materials, after the metering of the metering pump, the special spinneret module is used to spray out , The high-speed hot air stream can reasonably stretch and guide the polymer trickle from the spinneret hole. After cooling, it is formed on the roller, and the material is received and processed at the lower end. , to find problems in time and solve them in a timely manner.

The production line of meltblown non-woven fabrics includes many single equipments, such as the feeding machine for feeding the polymer, the screw extruder, the metering pump device, the spinneret module, the heating system, the air Presses and cooling systems, receiving and winding units. These devices work alone and are jointly commanded by plc and industrial computer to form a synchronization and tension control system, which is useful for frequency converters to control extrusion and transmission, winding, etc., as well as temperature control systems to control heating, frequency converters also Controls fans and cooling, etc. At present, the domestic spinneret module can not achieve very high precision, and needs to be imported from abroad, while other accessories can be produced in China at present, and the maintenance efficiency will be relatively high.

Some mechanical problems are easy to find and solve. For example, if a certain drive roller bearing is broken, it will make abnormal noise, and it is easy to find suitable accessories to replace. Or the reducer of the screw is broken, which will obviously cause speed fluctuations and make a loud noise.

However, for electrical problems, if a fault occurs, it is relatively hidden. For example, a certain contact of the PLC is broken, which will cause abnormal linkage. A certain drive optocoupler of the inverter is abnormal, causing the three-phase current of the motor to fluctuate greatly or even stop due to lack of phase. The parameters on the winding tension are not well matched, which will cause uneven winding. Or a line leaks, causing the entire production line to trip and fail to start.

When the touch screen touches the glass, due to too much pressing, or dust and grease run onto the cable head inside, resulting in poor contact or aging of the touchpad, which may cause ineffective pressing or failure, it needs to be dealt with in time.

PLC is generally less broken, but it does not mean that it will not be broken. Generally, most of the contacts and power supplies are burned. Compared with the problem, it is simpler and faster to deal with it. If the program is lost or the motherboard is faulty, it will cause The entire production line was paralyzed, and it was necessary to find a professional company in time to help solve it.

Inverter and tension control system, because the power used on this type of equipment is relatively large, if the cold cutting and dust removal are not paid attention to on site, it is easy to stop due to high temperature and static electricity in the production process .

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