Product Description

There are many types of mixing devices used on single-screw extruders. They are differentiated by either being primarily a dispersive or shear device that adds to the melting capacity, or a redistribution device that mixes essentially by dividing the melt numerous times to distribute the minor component as layers throughout the major component. All screw mixers necessarily have some of both features.

Product Detail

Screw mixer

There are many types of mixing devices used on single-screw extruders. They are differentiated by either being primarily a dispersive or shear device that adds to the melting capacity, or a redistribution device that mixes essentially by dividing the melt numerous times to distribute the minor component as layers throughout the major component. All mixers necessarily have some of both features.

The use of these mixing devices affects the overall performance of the screw, it plays a big role on the screw job, therefore screw mixer is unavoidable.


Some screw mixers are dependant and screwed into the screw body. When people walk with two legs, EJS has other groups of screw and barrel as well, such as Screw Elements, Twin Screw Extruder Parts. This expands our product range, keeps our 400 colleagues busy, most importantly it makes customers work easier.


Bore diameter available for Screw mixer

¢12~¢500


Popular Materials used for Screw mixer

38CrMoAlA(1.8509)

34CrAlNi7(1.8550)

31CrMoV9(1.8519)

SS304

SS316

D2(1.2379)

SKD61


Surface Treatment of Screw mixer

Nitrided

Bimetallic alloy coated

Hardened

Chrome-plating


Popular types of screw mixer:

Pin mixing;

Dulmage mixing;

Anderson expande mixing;

Saxton screw mixer;

Pineapple screw mixer;

Cavity transfer mixing;

Slotted screw flight mixing;

Buss kneader mxing;

Maddock screw mixer;

Blister ring mixing;

Dray mixing;

Egan mixing;


More information about screw mixer:

Almost all processes using a single screw require some degree of mixing, whether it’s just to homogenize regrind with virgin resin or to mix in some color concentrate.


There are three kinds of mixing: dispersive, distributive, and extensional.

Extensional mixing occurs predominantly in twin-screw extruders.

Dispersive mixing is like putting two materials to be mixed between two plates and rotating one of the plates.

Distributive mixing is like putting the two materials in a bowl and stirring them with a spoon. The number and path of the spoon strokes would be proportional to the degree of mixing.


About E.J.S.

EJS Screw Barrels is a newly created brand name for Export business with manufacturing experiences since 1992.
A screw barrel manufacturer dedicated on producing customized screw barrel and design extruder screw barrels, injection moulding screw barrels.


Bimetallic Screw Barrels

We started to make bimetallic screw barrel at a very early age, almost the same time as the first bimetallic barrel was born in China. Now we have several types for options depending on different applications

Bimetallic Barrels

Alloy Type

EJS01 Alloy

EJS02 Alloy

EJS03 Alloy

EJS04 Alloy

Alloy Components

Fe+Ni+Cr+B
(Fe:65, Ni:14, Cr8, B:3.5)

Ni+Cr+Co+B

Ni+Cr+Co+V+B

Ni+Wc+Cr+B
(Ni:50, Wc:15~35,Cr:6~8, B:2.5~3.2)

Wearing Resistance

★★★

★★

★★★

★★★★

Corrosion Resistance

★★

★★★

★★★

★★★

Alloy Thickness

2~3mm

1.5~2mm

1.5~2mm

1.5~2mm

Hardness

HRC 58-65

HRC 50-58

HRC 55-60

HRC 55-65

Temperature Range

≤400

≤450

≤450

≤600

Coefficient Thermal

RT~250℃

11.0x10-6

11.0x10-6

11.5x10-6

11.0x10-6

Expansion(/℃)

RT~400℃

11.4x10-6

11.4x10-6

12.4x10-6

12x10-6

Range of Workable Length

700mm~3000mm/piece

Base Steel Vastly Used

40Cr: 42CrMo

Mark in the list: ★★★★ Excellent; ★★★ Very Good; ★★Good


Bimetallic Screws

Suitable for

Single Screw, Twin Parallel Screw, Twin Conical Screw

Alloy Type

Ni60

CoImonoy 56

CoImonoy 83

Alloy Components

Ni+Cr+Fe+Si
(Ni:65, Cr:17, Fe:15, Si:5)

Ni+Cr+Si+Fe
(Ni: 68, Cr:18, Si:5, Fe:5)

Ni+Wc+Cr+C
(Ni:40, Wc:34, Cr:20, C:2)

Anti-Wearing Level

★★★

★★★

★★★★

Anti-Corrosion Level

★★★★

★★★★

★★★★

Alloy Thickness

1~1.5mm

1~1.5mm

1~1.5mm

Hardness

HRC 56-62

HRC 46~61

HRC 43-48

Applied Glass Fiber

Under 10%

 

 

Range of Workable Length

Any length needed

Base Steel Vastly Used

38CrMoAI(1.8509), 34CrAINi7(1.8550), 31CrMoV9(1.8519)

Mark in the list: ★★★★ Excellent; ★★★ Very Good; ★★Good



Quality Inspection

Quality is a very important step during production. For making a quality screw barrel, all tolerances should be fulfilled and all dimensions should be correct and put in records.

We provide inspection report, material certificate for every of our supplied screw barrels.


Packaging

Packaging is the last but very important step before shipping. A strong and smart packing box is also part of our quality. It is not only used to protect the screws barrels well during transportation, also provide an easy way for our customer to unpack.




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