stainless steel screw(original Hatachi HPM38,S136,SUS440,9cr18mov and other imported stainless steel)
Item | category | Processing ranges | Processing technology | Alloy composition | Hardness inde | Adhesion inde | straightness | roughness | Alloys nameplate | Notes of production |
HPM38,S136,SUS440,9cr18mov,etc import stainless steel | Stainless screw | Diameter 18mm-80mm | vacuum hardening,CNC Circular grinding one-time processing control | HITACHI high speed steel,Datong High speed steel | HRC50-55 | Whole smelting | 0.015mm/m | Ra0.4um | Japan HITACHI,Japan Datong | Used in optical glasses,LGF,transparent. |
Product introduction Raw materials used in Hitachi HPM38,S136,SUS440,9cr18mov,and other imported stainless steel.-applicable to the optical lens,LGF,a transparent molding and other products.PC,PMMA,ABS,U-PVC transparent products and PP fire resistandance and other corrosive plastics. Simple introduction of PC special screw. 1.non crystalline plastics,no obvious melting point,glass transition temperature of 140 DEG C to-160 degrees C,melting temperature 215-225 DEG C,molding temperature 230 to 320 DEG c.
2.viscosity,high processing temperature,narrow range,easy to decompose,selection of screw to avoid overheating phenomenon.
3.sensitive to moisture,high temperature resin hydrolysis,drying temperature of 120 degrees-130 degrees C,time 4 hours.
Parameter selection 1.L/D:As its good thermal stability,viscosity properties,to choose big L/D ratio to improve plasticizing effect.
2.Due to its wide melting temperature range,long feeding section,short,the moderate compression ratio is moderate,for improving plasticizing effect,barrier type plastic head can be chose.
3.if the flame retardant or glass fiber reinforced PC material,it will be good to choose stainless steel tool screw to resist corrosion and wear.
