Higher output and lower power consumption are two development trends of plastic extrusion machinery, ZHOUSHAN HINA MACH is devoted to development and manufacturing new type screw and barrel. Same diameter, our high efficiency screws and barrels for LDPE pipe extrusion machine have lager output than others screws and barrels, and same unit output, the power consumption is lower than other screws and barrel.
Parameters of high effiency screw and barrel:

high effiency.jpg

Technical Parameter:
Diameter of screw: φ15-φ500
L/D ratio: 15-55
Maximal length:10000mm
Hardness after hardening and tempering: HB280-320
Nitriding hardness: 950-1100HV
Nitrided layer depth: 0.5-0.8mm
Nitrided brittleness: Less than grade 2
Surface roughness: Ra0.4
Linearity of screw: 0.015mm/m
Bimetallic layer depth: ≥3mm
Bimetallic hardness: HRC60-72
Hard-chrome plating hardness after nitriding: ≥950HV
Chrome-plating layer depth: 0.025~0.10mm
Product classification:
According to different ingredients and products the screw can be chosen: general type, pin type, barrier type, separation type, and gas-exhausting/vented type, etc.
 
Material:
High-quality alloy steel
38CrMoAlA (JIS SACM645)
42CrMo (AISI 4140)
 
Technologies:
Nitriding
Hard chrome plating
High-frequency quenching
Vacuum quenching
Alloy powder spray welding

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