Product Description

Feed screw for molding machine

As a supplier for China Feed Screw for Molding Machines, we provide different surface treatment for different applications. Bimetallic Colmonoy 56, Colmonoy 83, Ni60, or Hard chrome-plated.

Feed screw for molding machine are commonly used in the plastics and food production industries to move, mix and extrude product.

In the plastics industry, feed screws are the hearts of the extruders used in blow molding, injection molding, sheet extrusion and profile extrusion.

In the food industry, feed screws are used essentially the same as in the plastics industry. The primary difference is that instead of melting the material, the food is cooked as it passes along the feed screw and formed into the desired shape at the end. Instead of applying direct heat, some types of food processing equipment use the feed screw to build up pressure, which generates the heat needed to cook the food product.

Feed screws are not only useful to extrude products. They are also used frequently in many industries to mix various raw materials into a final product.

EJS produces tens of thousands of feed screw for molding machine each year, single and twin, to customers nationally and internationally.E.J.S uses high quality 31crmov9 to produce screws and barrels for customers globally to ensure the quality of screws and barrels, because raw material is the core and footstone.

Bore diameter available for extrusion feed screws

¢12~¢500

Popular Materials used for extrusion feed screws

38CrMoAlA(1.8509)

34CrAlNi7(1.8550)

31CrMoV9(1.8519)

40Cr(4340)

42CrMo(4140)

SS304

SS316

D2(1.2379)

SKD61

Surface Treatment of feed screw for molding machine

Nitrided

Bimetallic alloy coated

Hardened

Chrome-plating

Application of feed screw for molding machine

Panel extrusion

Profile extrusion

Sheet extrusion

Pipe extrusion

Board extrusion

Compound extrusion

Blow moulding extrusion

For which brands of IMMs you can produce barrel and feed screw for molding machine? We are looking for supplier, which can produce feed screw for molding machine according to type and date of production of IMM only, without drawing from the customer ( for example according to the nameplate of IMM ).

We have been manufacturing barrel and feed screw for molding machine for Haitian, Chen Hsong, Cicinnati, Engel, Arburg, Husky, KMD machines etc., please be free to send us your nameplate information, then we could look them up and help you.

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.