• Technical specification

Hardness after hardening & tempering: HB240-280
Nitrided hardness: HV850-1050
Nitrided case depth: 0.45-0.7mm
Nitrided brittleness: less than grade 2
Surface roughness: Ra 0.4
Screw straightness: 0.015mm
Surface chromium-plating’s hardness after
Nitriding:=900HB
Chromium-plating depth: 0.03-0.10mm
Alloy hardness: HRC 50-65
Alloy depth:0.8-2.0mm

• Technical specification

Hardness after hardening & tempering: HB240-280
Nitrided hardness: HV850-1050
Nitrided case depth: 0.45-0.7mm
Nitrided brittleness: less than grade 2
Surface roughness: Ra 0.4
Screw straightness: 0.015mm
Surface chromium-plating’s hardness after
Nitriding:=900HB
Chromium-plating depth: 0.03-0.10mm
Alloy hardness: HRC 50-65
Alloy depth:0.8-2.0mm

• Specifications and uses

Specifications: diameter: F14-220mm
Nitriding depth: 0.4mm-0.7mm
Nitride hardness: HV850°-1000° degrees above the line:
0.015mm/1000mm
Chromium plating thickness: 0.05mm
Alloy Depth: 2.0mm
Scope of application: general plastic, PP, PE, ABS, AS, PS, PC,
PET, Bakelite.
Processing range: 30g-25000g injec tion volume:
250-clamping force all kinds of screw 32,000 tons, custommade
pipe any reasonable price, prompt delivery, quality
service.

• Specifications and uses

• Specification

Diameter: F15mm~F360mm L/D: 15~45

• Types of screw:

Gradual?saltation?wave?screen?double screen? distributary?separating?exhausting?dowel? mixed smelting?double screws?three screws?more screws?granulating, etc.

• Material

• Screw Accessories

Screw tip, screw ring, seal ring.


• Barrel Accesscries

Flange, end cap, connector, nozzle, cooling ring, Nut, external & internal spring controlled nozzle for nylon, Oil-pressure flange. Tiebar, Screw Tip, Screw Ring, Seal Ring, Flange, Nozzle

• Material:

GH113, HPT, MPT, Cr12MoV, SKD11, SKD61, SKD38, YXM, EFZD, DC53, SKH55, SKH59, SKH58, SKH51, SKH-9, ASP60, ASP30, ASP25, CW6MO5CR4V2, 45#, 40Cr.

The bimetallic barrel for single screw is a kind of barrel moulding 2-5mm-thick alloy coat on the barrel inner wall which has excellent corrosion resistance, abrasion resistance and high working temperatre. And its useful service life is greatly improved contrast to the common nitrided barrel.

Bimetal has more obvious advantages when processing special plastics to enhance the abrasion life, such as engineering plastics, fluorine plastics, PPO, and etc.

The company uses special alloy powders being sprayed and welded on the screw’s ridge, and used different alloys and welding methods for the screw of different functions.


The advantage of bimetallic screw: strong abration resistant, good for the 30% glass fiber and reworked materials.
Skin characteristics
1 super hard alloy of high density, low porosity and high hardness.
2 uniformity heating of powder and low strength pressure
3. can effectively smooth spray.
4. high dynamic energy and uniform hardness.
5. with high corrosion resistance, high wear resistance and high temperature resistance properties.
6. The adhesion force, can be processing, coating thickness.
Hardness: HV1100-1400
Adhesion strength: Above 10000Ps
Alloy powder of tungsten carbide (WC):
Nickel chromium alloy (NiCr), Self fluxing alloy (also according to the different material, the use of alloy powder mix).

• Application:

The barrel inner hole centrifugal casting of metal, alloy screw and barrel:
with wear and corrosion resistance, high temperature resistance, high pressure resistance, commonly used, lens, transparent shell, cosmetics containers, transparent acrylic, nylon, PVC, PC, PPA, PPO, PPS, PA6T, LCP, ABS, Bakelite, fire PC + glass fiber, Nylon + glass fiber, powder, ceramic powder, aluminum powder, iron powder, electric injection molding machine.

• Screw and barrel for Rubber machine:

1. Cool feeding rubber screw and barrel
Diameter: F25-F300mm
L/D=8~20

2. Hot feeding rubber screw and barrel
Diameter: F30-F300mm
L/D=4~8

3. Rubber screw and barrel with pin:
Diameter: F60-F250mm
L/D=12~18

• SCREW TYPE:

In order to get good plasticization to different rubber material, we could supply different screw designs.

• Standards of conical twin screw and barrel:

F35/75, F45/90, F45/100, F50/105, F51/105, F55/110, F60/125, F65/120, F65/132, F68/143, F70/140, F75/150, F80/143, F80/156, F92/188.

Screw can be designed according to different products and mixtures.

Scope of application: WPC PVC.WPC PE, Super high molecular sheet, 1/2 high Calcium buckle, 50-400 high Calcium pipe, 50-300 high Calcium Profile, soft PVC sheet, XPS-PVC etc. PP? PE?ABS?PVC, raw material, pelletzing, pipe, profile, sheet etc.

• Parallel Twin Screw And Barrel:

Ratio of length to diameter (L/D): 18~35 Screw can be designed according to different raw material and products.

Specification: F52/2, F60/2, F65/2, F70/2, F72/2, F75/2, F80/2, F85/2, F90/2, F93/2, F100/2, F105/2, F110/2, F115/2, F120/2, F125/2, F130/2, F140/2, F150/2, F160/2, F170/2, F180/2, F190/2, F200/2, F250/2.

• Specifications and uses

For good plasticizing effect, we have different design of screw and barrel to meet customer’s demand. Gradual type, mutant type, wave type, barrier type, double screen type, shunt type, separation type, exhaust type, pin type, mixed type, double-head type, three-head type, muti head type etc.
Scope of application: WPC PVC.WPC PE, Super high molecular sheet, 1/2 high Calcium buckle, 50-400 high Calcium pipe, 50-300 high Calcium Profile, soft PVC sheet, XPS-PVC etc. PP?PE?ABS?PVC, raw material, pelletzing, pipe, profile, sheet etc.