Product Description

Extrusion blow moulding screw barrel

OEM Supply China Blow Molding Machine, Extrusion Blow Moulding Screw Barrel, our company regards "Make screw barrel business Easier with Joys and Success" as our mission. If you are interested in any of our products or would like to discuss your design, make sure you feel free to contact us. We've been looking forward to establishing successful business relationships with any new clients around the world in the near future and grow them better and bigger.

In extrusion blow molding (EBM), plastic is melted and extruded into a hollow tube (a parison). ... Air is then blown into the parison, inflating it into the shape of the hollow bottle, container, or part. After the plastic has cooled sufficiently, the mold is opened and the part is ejected.

At EJS, we produce extrusion blow moulding screw barrel for extrusion blow moulding machines, with size small and big, in nitriding or bimetallic treatment.

Bore diameter available for Extrusion blow moulding screw barrel

¢45~¢250

Popular Materials used for Extrusion blow moulding screw barrel

38CrMoAlA(1.8509)

34CrAlNi7(1.8550)

31CrMoV9(1.8519)

40Cr(4340)

42CrMo(4140)

Surface Treatment of Extrusion blow moulding screw barrel

Full body nitrided

Stellite bimetallic alloy coated

Colmonoy 56 alloy coated

Colmonoy 83 alloy coated

Application of Extrusion blow moulding screw barrel

Extrusion blow moulding screw barrels are playing a superb job to produce various films in blow moulding machines such as

Packaging film;

Pouches;

Printing film;

Shrink film;

Food packaging film;

Converting film;

Barrier film.

Question: What is the difference between injection blow Moulding and extrusion blow Moulding?

Answer:

There are mainly 5 differences between injection blow moulding and extrusion blow moulding:

1) The type of product produced by injection blow mould and extrusion blow moulding is different. The extrusion blow Moulding process creates a two-dimensional product while the injection blow Moulding process creates a three-dimensional product as the final output.

2) They use different tool in both the processes. For extrusion blow moulding machine, a die is used to get the final output while injection blow moulding uses a mold.

3) The time needed to produce the final output is different. The extrusion Moulding process is slower whereas the Injection Moulding process is faster.

4) The thickness of final product is different. In case of extrusion, the part thickness depends on how much the material can be stretched during the process whereas, in case of intrusion, it depends upon the relationship between the core and the mold.

5) The processes are different. With the extrusion blow moulding machine, the scrap is with flash and trimming while the scrap is without flash and trimming for injection blow moulding.

EJS can produce both extrusion blow moulding screw barrel and injection blow moulding machine.

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.