Product Description

Pin screw barrel

We emphasize details, we pursue excellence, we work to become the best partner and supplier for China Pin Screw Barrel, because we stay with this line for dozens of years.

Various sizes for China Pin Screw Barrel, we are always doing our utmost to take good care of production of every Pin Screw Barrel with top-grade quality steel and competitive price and best after-service, we sincerely look forward to cooperating with you and make dreams true together in the future!

Pin screw barrel is single screw barrel used on a single screw extruder with up to 10 rows of radial pins projecting from the barrel wall into the screw fluite, thereby doing flow division, laminar change and drop in shear, giving excellent flexibility, perfect mixing and dispersing effect. The same machine can be adopted working with full range of rubbers without any change in the machine as regards screw design etc.

EJS produces pin screw barrel for pin extruders for over 20 years.Other than this, E.J.S produces feedscrew for customers natioanlly and internationally and always stand behind the products we produce and provide long term support for our products.

Bore diameter available for pin screw barrel

¢25~¢500

Surface Treatment of pin screw barrel

Nitrided

Hard Chrome Plating

Ceramic coated

Hardfacing / Bimetallic with Ni60, Colmonoy 56, Colmonoy 83

Quenching

Material request for pin screw barrel

Anti-high temperature;

Anti-wearing;

Anti-corrosion;

High strength to work with high torque and high speed;

Good cutting performance;

The relief and the thermal deformation is small after heat treatment.

The material for rubber barrel include:

38CrMoAlA (DIN1.8509)

42CrMo ( AISI4140)

Stainless steel 304

Application of pin screw barrel

Shim and cable

Tire

Rubber profile

Rubber sheets

Rubber flooring

Benefits of pin screw barrel for pin barrel extruders

A universal extrusion system applicable to whole range of rubber compounds (Natural / Synthetic) without change of screw design or any other alterations;

Excellent mixing and homogenising;

Compounds with minimum thermal stresses;

Compounds with outstanding heat exchange between material particles;

Low energy absorption;

Minimum shear;

Lower extrusion temperature;

Screw and barrel self cleaning;

No need of pre-heating mills, space saving;

Higher outputs;

Great extrusion quality.

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.