bimetallic rubber screw for rubber machine

Base Materials:

1)38CrMoAlA(SACM 645)

2)42CrMo(AISI 4140)

3)Cr12MoV(SKD11)

4)4Cr5MoSiV1(SKD61)

5)9Cr18MoV

6)40Cr

Bimetallic Alloy Materials:

1)Fe-based alloy

2)Ni-based alloy

3)Co-based alloy

4)Tungsten carbide

Processing Technology: 

Heat treatment

High-frequency quenching 

Nitriding treatment

Hard-chrome electroplating 

Bimetallic alloy welding

Bimetallic alloy centrifugal casting

Technical Parameter:

Nitrided layer depth:0.50-0.80mm

Nitrided hardness: 900-1100HV 

Nitrided brittleness: Less than 2 level

Surface roughness: Ra 0.4

Linearity of screw: 0.015mm

Hard-chrome plating hardness after nitriding: ≥950HV

Chrome-plating layer depth: 0.025~0.10mm 

Bimetallic layer depth: 2 mm

Bimetallic hardness: HRC50-65

Q1: What’s screw barrel?

R: Screw barrel is the major and most important part for plast injection and extruder machines.

It provides the plasticization of plastic.

Q2: Is your company factroy or trading company?

R: We are factory.

Q3: Who is JINMAO?

R: JINMAO is a one of the largest manufacturers, specialized in researching, designing and 

manufacturing all kinds of screws, barrels, and other accessories for extrusion and injection

moulding nearly 20 years.We have a series of advanced production and processing equipments

such as CNC machines, Stellite PTA welding machines to ensure the quality of our products. Our Tech. and R&D team have over 10 year's experiences, and can help you improve product quality and production efficiency.

Q4: We bought screw barrels from machine suppliers, will you quality lower 

than their?

R: Actually, most machine companies always buy screw barrels from screw barrel suppliers, 

because we are more professional in this field. Our quality will be as good as machine supplier.

Q5: Can you produce customized screw barrel according to our drawing?

R: Yes, it can’t be better you provide us your drawing!

Q6: We have no compelete drawing, if I give you connection size, can you do 

design for us?

R: We adopt the best raw material and our every production process is under strict inspection, which guarantee the quality and long using life of our products. 

R: 1)Good quality guarantee

2)Outstanding design capability  

3)Thousands of drawings can supply for you

4)Professional Tech. and R&D team

5)Strict quality control as per ISO9001:2008 

6)We will service for you in 24 hours and reply promptly

7)Fast production and delivery

8)Large international market 

9)Very competitive price