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Film blowing machine
Specification parameters:
Screw diameter:Φ16-Φ300
the whole set contains: screw, screw head, check ring, gasket, cylinder, precursor and nozzle.
The screws can be specially designed according to different products and recipes.


Base material form: Bimetallic Screw Barrel in china
1)38CrMoAlA(JIS SACM645)
Material composition analysis:
C: 0.35~0.42 Si: 0.20~0.45 Mn: 0.30~0.60 S: ≤0.035 P: ≤0.035 Cr:1.35~1.65 Al: 0.70~1.10  Ni: ≤0.030  Cu: ≤0.030   Mo:0.15~0.25

Treatment process:
Tempering, qualitative treatment
Nitriding process
Spraying alloy

Technical parameters: Tempering hardness: HB260-290 Nitriding depth: 0.50mm-0.80mm Nitriding hardness: 900-1000HV Nitriding brittleness: <= level 1 Surface roughness: Ra 0.32 Screw straightness: 0.015mm Alloy layer thickness: 2-3mm Alloy layer hardness: HRC58-65