• Model NO.：Injection screw barrel
• Automation：Automatic
• Computerized：Computerized
• Certification：ISO9001:2008
• Screw Barrel：Single Screw Barrel for PVC Injection
• Nitrided Layer Depth：0.5-0.8mm
• Nitrided Hardness：900-1000hv
• Nitrided Brittleness：Less Than Grade 1
• Surface Roughness：Ra0.4
• Linearity of Screw：0.015mm
• Transport Package：Wooden Cases
• Specification：ISO9001: 2008
• Trademark：Zhongyang
• Origin：China(Mainland)
• HS Code：84779000
• Production Capacity：200 Sets,Month

twin conical screw barrelDiameterΦ25/53,35/77,45/90,51/10,
55/110,65/120,65/132,
70/140,75/150,80/156, 80/172,90/184 92/188.etc 
Designing
 Screw structure and compression
ratio can be designed according
to different products  &different mixtrues. Standard SpecificationsISO9001,
GBT9001-2000
SO9001-2000
IAF,BOS,CNASAdvantages1.Long time Nitriding Technology 
2.Anti-corrosion and Wear-resisting Duplex Metal Spraying Technoloy3. we uses special alloy powders being sprayed and welded on the screw's ridge,and uses different alloy and welding methods for the screw of different functions.Materials38CrMoAlA 
(JIS SACM645)
SKD61 .etcApplication  PS,HIPS,ABS,SAN,EPN/LDPE,HDPE,UHMPE,
EVA,PP,PVC,PMMA,POM,PAST,PET,PBTNitride Depth0.4mm-0.7mmTechnology1)Longer time Gas Nitriding treatment 
2)special anti-wear & abrasion alloy (bimetallic)
3)tungsten carbide;4)cobalt base alloy
5)stainless steel 6)Gh113 nickel based alloy  Nitride Hardness950-1050HVPackingWrapped up by film in woodenNitride Brittleness≤Grade OnePayment 
TermT/T , L/C ,Western UnionSurface RoughnessRa0.4umDelivery 
Term20-30 working daysScrew Straightness0.015mmPort
 DepartureShanghai/NingboAlloy HardnessHRC55-62Min. Order1 setAlloy Depth1.5mm-3.5mmWarranty period: 2-4years(Depends on the plastic raw materials)
Bimetallic: much longer lifetime.Nitriding timeOver 180 hours