Bimetallic screw barrel:A,B,C          Bimetallic barrel for injeciton moulding machinewe have deeply researched on the barrel and screw for the special engineering plastic,for now much of engineering plastics add the calcium,kaolin,red clay, silica or add Glass fiber, carbon fiber, boron fiber and halogen free plastic to make the original plastic much better to adapt the specific plastic products.On the other hand, it may make the screw and barrel wear and corrosion quickly, In order to solve this problem,we have invented a kind of special alloy powder,whose ingredient contains 25%~50% Wc tungsten carbide.It makes the service life of screw and barrel much more longer than the other kinds of bimetallic screw and barrel.





Bimetallic barrel for extrusion machine

Injection Screw Barrel

Screw diameter: Ф20-Ф220
Mould clamping force: 100KN-35000KN
Shot weight:30-30000G
Screw can be mated with different heads of screw.
Cyclinder can be mated with differernt sprinkler heads.
Technical Parameter:
Hardness After Hardening & Tempering:HB280-320
Nitrided hardness: 950-1100HV
Nitrided layer depth:0.50-0.80mm
Nitrided brittleness: ≤2 level
Surface roughness: Ra 0.4μm
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 ingredents and products the screw can be chosen: general type, pin type, barrier type, separation type, and gas-exhausting/
vented type, etc.Technical Parameter:

Fully hardened screw     Fully hardened screwSKD61, DC53, SKH55 (YXM4 high speed steel), with the overall secondary hardening and tempering process. Particularly suitable for high-wear products processing requirements, to ensure wear resistance, corrosion product needs. <<< Technical indicators: Application: injection molding machines, bakelite machines Processing screw dia.:Ф14mm-Ф120mm maximum length to 4000mm Hardness: HRC62 °-68 ° Applicable plastic: LCP, PBT, PET, PPC, PPS, PAR, etc., above 30%GF, or add other additives, such as magnetic powder, ceramic powder, aluminum and magnesium powder, iron and other engineering plastic.

Nitride screw barrel     Nitride screw barrel for injection machinesMaterial selection of high quality steel (38CrMOALA) or chromium-molybdenum alloy steel black cross (SACM645) after quenching and tempering, shaping, forming, grinding, or spray the surface nitride alloy (bimetal), polishing process is refined, with high wear resistance, anti-corrosion advantages. Technical Specifications:
Production use: Injection molding machinery / Bakelite machinery / injection molding machinery / Bakelite machinery / extrusion machinery / blowing machinery / blown film machinery / granulator machinery / extrusion machinery / pipe machinery / sheet machinery / wire and cable machinery
Effective length: 12000mm
Nitriding depth: 0.4mm-0.7mm
Nitriding hardness: HRC55 ° -58 °
Straightness: 0.015mm-1000mm
Scope: ordinary plastic, PP, PC, PE, ABS, AS, PS, PVC, PMMA, etc.

Extruder screw barrel Extruder screw barrelDiameter: φ15-φ500
L/D ratio:15-55
Technical Parameter:
Hardness After Hardening & Tempering:HB280-320
Nitride hardness: 950-1100HV
Nitride layer depth:0.50-0.80mm
Nitride brittleness: Less than 2 level
Surface roughness: Ra 0.4μm
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 ingredents and products the screw can be chosen: general type, pin type, barrier type, separation type, and gas-exhausting/vented type, etc.

Rubber screw barrel Pin Screw and Barrel Specification: Ø75mm~Ø200mm
Cold/Heat Feed Screw Specification: Ø65mm~Ø650mm
Technical Parameter:
Hardness After Hardening & Tempering:HB280-320
Nitride hardness: 950-1100HV
Nitride layer depth:0.50-0.80mm
Nitride brittleness: Less than 2 level
Surface roughness: Ra 0.4μm
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

Extruder conical twin-screw & barrel Specifications:
Refer to the following is small part of screw and the max part will be designed according to the compression ratio: Ф35/75，Ф40/83，Ф45/90-99，Ф48/112-117，Ф50/105-110，Ф51/105-120，Ф55/110-125，Ф58/125， Ф60/125-129，Ф65/120-132，Ф68/147，Ф70/Ф50，Ф74/156-162，Ф80/143-156-162，Ф86/177，Ф92/184-188
Techniccal parameter:
1.Raw Meaterial:38CrMoAlA
2.Hardness after Hardening & Tempering: HB240-280
3 Nitriding treatment,Surface hardness:HV1030-1080
4 Nitriding depth:0.5-0.7mm
5. Surface roughness: Ra0.4um
6.Fragility of Nitriding: ≤grade 2
7.Straightness: 0.015mm/m
8.Hardness of Bimetallic :HRC55°-68°
9.Depth of Bimetallic: >2mm
10.Chromium-plating hardness:HV≥900
11.Chromium-plating Depth:0.025-0.10mm
Scope of application :
PVCwood-plastic., PE wood-plastic,,Super high polymer board,1/2 high Calcium buckle,50-400 high Calcium pipe,50-300 high Calcium Profile,soft PVC sheet, PVCfoaming boardetc.
PP、PE、ABS、PVC,raw material pelletzing,plastic pipe,plastic profile,and plastic sheet etc.

Extruder parallel twin-screw & barrel Specification:
Ф60/2, Ф65/2, Ф70/2, Ф72/2, Ф75/2, Ф80/2, Ф85/2, Ф90/2, Ф93/2, Ф100/2, Ф105/2, Ф110/2, Ф115/2, Ф120/2, Ф125/2, Ф130/2, Ф140/2, Ф150/2, Ф160/2, Ф170/2, Ф180/2, Ф190/2, Ф200/2, Ф250/2,
Techniccal parameter:
1.Raw Meaterial:38CrMoAlA
2.Hardness after Hardening & Tempering: HB240-280
3 Nitriding treatment,Surface hardness:HV1030-1080
4 Nitriding depth:0.5-0.7mm
5. Surface roughness: Ra0.4um
6.Fragility of Nitriding: ≤grade 2
7.Straightness: 0.015mm/m
8.Hardness of Bimetallic :HRC55°-68°
9.Depth of Bimetallic: >2mm
10.Chromium-plating hardness:HV≥900
11.Chromium-plating Depth:0.025-0.10mm
Scope of application :
PVCwood-plastic., PE wood-plastic,,Super high polymer board,1/2 high Calcium buckle,50-400 high Calcium pipe,50-300 high Calcium Profile,soft PVC sheet, PVCfoaming boardetc.
PP、PE、ABS、PVC,raw material pelletzing,plastic pipe,plastic profile,and plastic sheet etc.

Bimetallic twin screw & barrel Material
原材料raw material 成品处理要求
The finished product processing equirements
38CrMoAlA，SACM645，42CrMo 渗氮处理Nitriding treatment
42CrMo，AISI 4140 电镀硬铬层Electroplating Hard chrome layer
4Cr5MoSiV1，SKD-61，SKD-11 喷涂双金属合金层再渗氮处理
Spraying bimetal alloy layer and nitriding treatment
HPM38，SI36，SUS440，Cr18MoV 不锈【铁】钢, 高频淬火stainless steel high frequency quenching
GHII3 高温工作自然硬化nature hard after high temperature