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
2）42CrMo
3）SKD61
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