What is the function of the melting device of Polypropylene Spinning Machine?

Polypropylene Spinning Machine is used for spinning polypropylene filament (civilian yarn, industrial yarn, carpet yarn); including chip extrusion melting (melt conveying), spinning, cooling (oiling), temperature control, frequency conversion control.

Detailed explanation of the melting device of polypropylene spinning machine:

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

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

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

① Feeding area (curing area) constant depth screw.

② Front half (cooling zone) Jacketed coils or screw cores pass cooling water, <100 ° C to prevent premature melting of materials and clogging materials 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 compresses (the screw groove volume becomes smaller); returns air or water vapor to the feeding zone.

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