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Injection Molding Feed Screws

An injection molding machine, also known as an injection press, is a machine for manufacturing plastic products by the injection molding process. It consists of two main parts, an injection unit and a clamping unit. EJS makes injection molding feed screws and barrels for injection unit of injection moulding machine, as well as tie bars and tie rods. We produce customized injection molding feed screws for JSW, BOY, ARBURG injection molding machines as per drawing provided.

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Product Description

Injection molding feed screws

The corporation upholds the philosophy of "Emphasize details, Pursue excellence", we continue to “ keep communicating, keep focusing, keep cooperating, keep improving” for China High Quality Injection Molding Feed Screws, we warmly welcome customers, business associations and friends from all over the world to contact us and seek cooperation possibilities for mutual benefits.

Unlike western people, we Chinese prefer not to put all eggs in one basket. When we focus on screws and barrels, we have different types, such as injection blow moulding process, injection machine barrel and injection molding barrel, etc. Therefore when one product is less requested, the other one might need more. This will keep our factory in good balance.

EJS makes injection molding feed screws and barrels for injection unit of injection moulding machine, as well as tie bars and tie rods.

We produce customized injection molding feed screws for JSW, BOY, ARBURG injection molding machines as per drawing provided.

E.J.S has been manufacturing 1.8519 screw barrel for years, you are welcome to contact EJS Team for more details.

Bore diameter available for Injection molding feed screws

¢16~¢220

Popular Materials used for Injection molding feed screws

38CrMoAlA (DIN1.8509)

34CrAlNi7 (DIN1.8550)

31CrMoV9 (DIN1.8519)

40Cr (AISI 4340)

42CrMo ( AISI4140)

SKD61

SKD61 hardfacing

D2 ( Din1.2379)

Surface Treatment of Injection molding feed screws

Full body nitrided

Quenching

Bimetallic alloy coating

Different percentage of glass fiber added, different bimetallic type could be chosen

Application of Injection molding feed screws

Consumer goods;

White goods;

Electronics;

Medical;

Packaging;

Logistics;

Automotive...

Is 3D printing cheaper than injection molding?

3D printing is not fast as injection molding. Thus, when the quantity demand is big on the same production, injection molding is more cost- effective.

In the past few years, EJS has been producing big quantities of 3D printing screw barrels as well as injection molding feed screws barrels, we can easily see 3D printing business is fast-growing these years.

Which is better, 3D printing or injection molding?

You are very welcome to email us your ideas.

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.