National Hotline:0086-0519-89611688
Polypropylene spinning machine Polypropylene FDY spinning machine Polyester POY spinning machine Polyester industrial yarn spinning traction machine Polyester regeneration bottle tablets POY spinning machine
Home>News
[Know the polypropylene spinning machine]
Release date:[2020/9/4] Read a total of[78]time

Generally, the spinning machine itself has 4 functional areas.




① High polymer melting device: screw extruder.


②Melt conveying, distribution, spinning and heat preservation device: elbow, spinning box (melt distribution pipe, metering pump, spinning head assembly).


③Thread cooling device: spinning window and cooling sleeve.


④Wire collection device: wet oiling mechanism, guide wire structure, winding machine or wire receiving device.


Melting device




(1) Function: The supply of solid materials, polymer melting, and quantitative melt extrusion.


(2) Three screw sections: feeding section, compression section and metering section.


(3) The working principle of the screw extruder is the division of the screw and the movement of the material in each area of the screw.




① Feeding zone (curing zone) isometric screw.


② In the first half (cooling zone), cooling water is passed through the jacketed coil or the inner core of the screw, <100℃ to prevent premature melting of the material and ring blockage to protect the screw drive mechanism from heat.


③ The second half (preheating zone) prevents sudden temperature changes from the feed zone to the compression zone.


④ Compression zone (melting zone) The gradual or abrupt screw melts the material (heating, shearing) and compressing (the volume of the screw groove becomes smaller); returning air or water vapor to the feeding zone.


⑤ Shallow screw such as measuring area (homogenization area).


 


Melt conveying, distribution, spinning and heat preservation device




(1) The melt conveying pipeline from the elbow screw extruder to the spinning box (one end is connected to the screw outlet and the other end is connected to the melt distribution pipe of the spinning machine)-jacketed internal biphenyl-diphenyl ether mixture Heating (melt insulation).


(2) Spinning box body, melt distribution pipe, ten biphenyl heating box, spinning pump and its transmission device, and spinning head assembly.




① Principle of melt distribution pipe


② Ensure that the melt reaches the same distance to each spinning position. The melt stays in the distribution pipe for a short time; there is less foldback.


③ The form of melt distribution pipe: branch type and radial type.




(3) Heating of the spinning box (biphenyl heating box)




① Function: Heat preservation and heating function for melt distribution pipe, metering pump and spinning head assembly.


②Method Biphenyl-diphenyl ether heat carrier (biphenyl/diphenyl ether-26.5%/73.5%), heated with electric heating rod.


③Insulation 80~100mm insulation layer, filled with ultra-fine glass fiber or other insulation materials.




(4) Metering pump High temperature gear pump.


(5) Spinning head assembly


① Function: Filter the melt, prevent clogging of the spinneret orifice. The melt is fully mixed, reduce the difference in melt viscosity, and evenly disperse the melt into each small hole of the spinneret to form a trickle of melt.


② Structure: Combination of spinneret + melt distribution plate + melt filter material + assembly sleeve.




Heating of the spinning box (biphenyl heating box)


① Function: Heat preservation and heating function for melt distribution pipe, metering pump and spinning head assembly.


②Method Biphenyl-diphenyl ether heat carrier (biphenyl/diphenyl ether-26.5%/73.5%), heated with electric heating rod.


③Insulation 80~100mm insulation layer, filled with ultra-fine glass fiber or other insulation materials.


 


Wire rod cooling device




(1) Spinning window The filament is only cooled by the directional, quantitative and qualitative air flow during the cooling process, the cooling rate is uniform, and the fiber solidification position is fixed (not affected by the surrounding airflow).


(2) The lower part of the slow cooling chamber is provided with two front and rear inserts to separate it from the cooling spinning drum, and the upper part has a locker to form a slow cooling zone under the spinneret; the length is 30~200mm; to prevent the cooling wind from blowing cold spray The surface of the silk plate reduces the birefringence of the winding silk and improves the stretchability.


Related Keywords: