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Structure principle and precautions of meltblown non-woven fabric production equipment

by:XINYU Non-woven     2022-01-23

Non-woven fabrics are the upstream products of the mask industry. Without non-woven fabrics, mask machines are also difficult to cook without rice. For a small single-layer meltblown non-woven production line, non-woven manufacturers will spend more than 2 million yuan, and the price of three layers is higher, costing more than 7 million yuan. It also takes two to three months to debug. Once a breakdown occurs, in addition to the loss of raw material costs, heating, water and electricity costs, as well as lost labor costs for workers, working capital in the factory, it will also miss the golden production time and cause losses. After the meltblown non-woven equipment fails, you should contact a professional maintenance team to deal with it in time. Time is money. The shorter the time to find a professional maintenance team, the lower the loss.

Melt-blown non-woven fabrics are different from traditional spunbond production. It uses high-speed hot air to stretch the polymer trickle from the spinneret holes of the module to become An ultra-fine short fiber is produced, which is guided to the roller to cool and form by its own adhesive force.

Its production process is a flow process, from the loading and unloading of polymer materials, to the melting and extrusion of materials, through the metering of the metering pump, using a special spray The high-speed hot air stream will stretch and guide the polymer trickle from the spinneret hole reasonably. After cooling, it will be formed on the roller, and the material at the lower end will be received and processed in one go, and any link will appear. Problems may cause production interruptions. Problems must be discovered in time and solved in time.

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, 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 cannot achieve high precision, and it 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, causing the pressing to fail or fail, 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. It is simpler and quicker to deal with the relative problems. If the program is lost or there is a problem with the main board, 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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