Mask Melt-blown Cloth Spinneret Die Mould
1. overview and principle of meltblown cloth equipment
the melt-blown method is a method for preparing fibers by blowing polymer melts with high-temperature and high-speed airflow to rapidly draw them. (melt-blown cloth extruder, melt-blown cloth equipment, melt-blown cloth production line)
after the polymer chips are heated and pressed into a molten state by a screw extruder, they reach the spinneret hole at the front end of the nozzle through the melt distribution flow path, and after extrusion, they are refined by two converging high-speed and high-temperature air flows to refine .
the refined fibers are cooled and solidified on the screen device to form a melt-blown nonwoven fabric.
2. components of meltblown cloth equipment
meltblown heads, automatic charging system equipment components, ultrasonic cleaning machines, air heaters, centrifugal fans, screw extruders, meltblown web forming machines, meltblown offline winding machines, meltblown offline slitting machines and other key equipment.
3. the core components of meltblown cloth equipment
spinneret
the spinneret for melt spinning is a representative spinneret for the manufacture of synthetic fibers such as polyester and nylon. the thermoplastic resin is heated and melted, extruded through the spinneret in air or water at a certain speed, and cooled spinning method of solidifying into fibers
the most core technology is the small nozzle on the spinneret. this nozzle not only has a small size of only 0.15mm, but also needs to process a complex hole pattern on such a small nozzle. the processing is extremely difficult, and the nozzle processing process requires months. if the processing accuracy is not high, the melt-blown cloth finally produced will not meet the corresponding technical requirements, which will affect the protective performance of the mask.
structure of melt-blown cloth spinneret
according to the shape of the spinneret, the structure of the spinneret can be divided into three forms: round, sector and rectangle. at present, round and rectangular plates are mostly used at home and abroad. to suit different chemical fiber spinning occasions, the round spinneret is divided into flat type, flange flat type, flat ring, flange ring, etc .: the rectangular spinneret is divided into flange rectangle and flange groove rectangle, etc. , mostly used for spinning short fibers with many holes.
meltblown cloth spinneret structure
meltblown die head
the die head includes a die head body, a spinneret plate and a gas plate. the spinneret plate and the gas plate are detachably installed in the die head body. a spinneret hole is provided in the spinneret plate. there are several gaps between the spinneret plate and the gas plate there are several gas circulation channels in the die body. the gas circulation channels communicate with the slot. the outer wall of the die body is provided with a gas pipe connection end. the gas pipe connection end is connected to the gas collecting chamber through the gas pipe through, the one end of the spinneret of the spinneret is fixedly connected with a flow stabilizing member, and the other end of the spinneret is fixedly connected with a pipe connection device. the spinneret is connected to the discharge port of the screw extruder through the pipe connection device connected.
in the melt-blown equipment, the melt-blown die head is one of the core components to realize the wire drawing of the polymer. the design and accuracy directly affect the length, uniformity, toughness, fineness and other aspects of the wire drawing, thus affecting the quality of the final coil. have a decisive impact.
