General spinning machine itself has 4 functional areas.
① High polymer melting device: screw extruder.
② Melt conveying, distribution, spinning and insulation device: bend pipe, spinning box (melt distribution pipe, metering pump, spinning head assembly).
③ Wire cooling device: spinning window and cooling sleeve.
④ Wire collection device: wet oil mechanism, wire guide structure, winding machine or wire receiving device.
Melting plant
(1) The role of solid material supply, polymer melting, melt quantitative extrusion.
(2) screw feed section, compression section and metering section.
(3) The working principle of screw extruder is the partition of screw and the movement of material in each area of screw.
(1) feed area (curing area) and other deep screw.
② The first half (cooling zone) jacket coil or screw inner core through cooling water, < 100℃ to prevent the material from premature melting and ring blocking material to protect the screw transmission mechanism from heat.
③ The latter half (preheating zone) to prevent the material from the feed zone to the compression zone temperature abrupt change.
(4) compression zone (melting zone) gradual or sudden change of screw melt material (heating, shearing) and compression (spiral groove volume becomes smaller); Return air or steam to the feed area.
(5) Measurement area (homogenization area) and other shallow screw.
Melt conveying, distributing, spinning and insulation equipment
(1) The melt conveying pipe from the bending screw extruder to the spinning box (one end is connected with the screw outlet and the other end is connected with the spinning machine melt distribution pipe) -- the biphenyl-diphenyl ether mixture in the jacket is heated (melt insulation).
(2) Spinning box melt distribution pipe ten biphenyl heating box ten spinning pump and its transmission device ten spinning head assembly.
① Principle of melt distribution tube
(2) Ensure that the distance between the melt and each spinning position is the same. The residence time of the melt in the distribution tube is short; Less retraction.
③ The form of melt distribution tube branch type, radiation type.
(3) Heating of spinning box (biphenyl heating box)
(1) Heat preservation and heating of melt distribution pipe, metering pump and spinning head components.
(2) Method Biphenyl diphenyl ether heat carrier (biphenyl/diphenyl ether - 26.5%/73.5%), heated with electric heating rod.
(3) Insulation layer of 80 ~ 100mm, filled with ultrafine glass fiber or other insulation materials.
(4) metering pump high temperature gear pump.
(5) Spinning head assembly
① Filter the melt to prevent the blockage of the spinneret hole, reduce the difference in the viscosity of the melt, and evenly disperse the melt into each hole of the spinneret hole to form a trickle of melt.
② Structural spinneret + melt distribution plate + melt filter material + assembly sleeve.
Heating of spinning box (biphenyl heating box)
(1) Heat preservation and heating of melt distribution pipe, metering pump and spinning head components.
(2) Method Biphenyl diphenyl ether heat carrier (biphenyl/diphenyl ether - 26.5%/73.5%), heated with electric heating rod.
(3) Insulation layer of 80 ~ 100mm, filled with ultrafine glass fiber or other insulation materials.
Wire cooling device
(1) The spinning window makes the filament only cooled by directional, quantitative and fixed air flow in the cooling process, the cooling rate is uniform, and the solidification position of the fiber is fixed (not affected by the surrounding air flow).
(2) The lower part of the slow cooling chamber is provided with two insert plates, so that it is separated from the cooling spinning cylinder, and the upper part is provided with a lock, so that the slow cooling zone is formed under the spinneret; Length 30~200mm; Prevent the cooling wind blowing cold spinneret surface, reduce the winding wire birefringence, improve the tensile.