Precision Screw & Barrel Manufacturing
Engineered to the micron.
Built to outlast.
Bi-metallic, nitrided and carbide-coated plasticizing screws and barrels for injection molding, blow molding and extrusion — trusted since 2014.
Ø16 mmUP TO 8000 MM LENGTHØ450 mm
8000mm
Maximum screw length
Ø16–450
Diameter range, mm
10+
Years serving industry
Every component.
One standard: precision.
Our flagship lines — see the full catalog on the Products page.
See all 13 product lines ›
Ready when you are.
Send us your drawing or machine spec — we'll quote a precision-matched component, fast.
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Global Footprint
Made in Ahmedabad.
Running worldwide.
Our screws and barrels power machines across India and East Africa.
Ahmedabad — HQ
India network (11 regions)
International — Ethiopia & Kenya
Detailed Professional Product Catalogue
Thirteen product lines.
One standard: precision.
Single Screw • Barrier • Twin Screw • Bimetallic • Vented • Grooved Feed • Application-Specific Solutions
01
About Screw & Barrel Assemblies
Screw and barrel assemblies are precision components used in plastic processing equipment. The rotating screw conveys polymer through the heated barrel, while the screw geometry and barrel design control conveying, melting, mixing, degassing, pressure generation and metering. The correct design depends on polymer type, additives, output requirement, machine configuration and operating conditions.
This catalogue separates the major product families so each product can be specified according to its actual processing purpose.
02
Single Screw Barrel
Single screw barrels are used with single-screw extruders and injection moulding machines. The screw normally performs feeding, compression/melting, mixing and metering inside a close-clearance barrel.
Typical Applications
- General-purpose extrusion of PE, PP and other thermoplastics
- Pipe, profile, sheet, film and pelletizing lines
- Injection moulding and selected blow-moulding applications
Materials & Construction
Typical construction: nitriding steel such as EN41B / 41CrMoAl7 or equivalent; wear-resistant alloy or bimetallic options can be selected for demanding materials. Exact metallurgy should be matched to the polymer and filler package.
Engineering & Design Considerations
Conventional three-zone, barrier, mixing, decompression or application-specific screw profiles can be supplied. Barrel dimensions, heating/cooling zones, feed section and bore tolerances are machine-specific.
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03
Barrier Screw Barrel
Barrier screws use a secondary barrier flight in the melting section. The geometry separates solid polymer from molten polymer, helping solids continue melting while melt moves toward the metering channel.
Typical Applications
- High-output PE/PP extrusion
- Film, pipe, sheet and profile extrusion
- Applications where improved melting consistency and reduced unmelt are required
Materials & Construction
Barrier geometry can support higher throughput or improved melt quality, but the design must be optimized for the specific resin and machine.
Engineering & Design Considerations
Typical design considerations include primary and secondary channel depths, barrier clearance, compression ratio, L/D ratio and downstream mixing elements.
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04
Twin Screw Barrel – Conical
Conical twin screw barrels use two screws whose axes converge. They are widely associated with PVC and profile/pipe extrusion because the conical arrangement provides useful conveying, mixing and pressure-building characteristics.
Typical Applications
- PVC / UPVC / RPVC pipe extrusion
- PVC profile extrusion
- Selected WPC and specialty extrusion
Materials & Construction
Common constructions include nitrided alloy steel and bimetallic or sleeved wear-resistant designs. One supplier lists EN41B and bimetallic constructions for conical twin sets.
Engineering & Design Considerations
Available in machine-specific sizes and center distances. Proper screw/barrel alignment, bore geometry and clearance are essential for service life and processing stability.
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05
Twin Screw Barrel – Parallel
Parallel twin screw barrels accommodate two parallel screws and are used where intensive mixing, compounding and high-output processing are required.
Typical Applications
- Polymer compounding
- Filled and reinforced compounds
- Masterbatch and additive dispersion
- PVC and other extrusion applications
Materials & Construction
Options include nitrided steel, hardened sleeves, HSS sleeves and bimetallic constructions depending on the wear and corrosion environment.
Engineering & Design Considerations
Barrel sections can be configured for conveying, kneading/mixing, melting, venting and pressure build-up. Co-rotating and counter-rotating systems require different screw-element arrangements.
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06
Bimetallic Screw Barrel
Bimetallic barrels use a structural steel outer body with a wear- and/or corrosion-resistant alloy lining. This construction is intended to increase service life under demanding processing conditions.
Typical Applications
- Abrasive fillers such as glass/mineral-filled polymers
- Corrosive polymers and additives
- High-volume production
- PVC and engineering resin compounding
Materials & Construction
Published manufacturer examples describe HSS-based or tool-steel systems and alloy linings. BR Engineering Works reports bimetallic layer hardness of approximately 55–72 HRC and a 1.5 mm coating thickness for its product.
Engineering & Design Considerations
Bimetallic selection should consider filler loading, polymer chemistry, processing temperature, pressure and expected wear mechanism.
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07
Vented / Two-Stage Screw Barrel
Vented screws include a decompression or vent section that reduces melt pressure and allows moisture, air or volatile components to be removed through a barrel vent, often under vacuum.
Typical Applications
- Recycling and reprocessing
- Moisture-sensitive materials
- Materials containing volatile components
- Selected PET, PA and recycled polymer applications
Materials & Construction
The vent zone must be designed so melt does not flood or plug the vent. Vented designs commonly use longer L/D configurations and require correct process conditions.
Engineering & Design Considerations
Important parameters include decompression-zone depth, vent location, downstream conveying capacity, vent-port design and vacuum arrangement.
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08
Grooved Feed Screw Barrel
Grooved-feed barrels have engineered grooves in the feed section to improve solid conveying by increasing friction between the feedstock and barrel surface.
Typical Applications
- High-output extrusion
- Pipe and profile lines
- PVC, PE, PP and other thermoplastic extrusion
Materials & Construction
Grooved feed sections may use hardened alloy steel, D2 or EN41B sleeves, nitrided surfaces or other wear-resistant constructions.
Engineering & Design Considerations
Groove geometry, depth, pitch and cooling are important because the feed section strongly influences solids conveying and throughput stability.
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09
WPC Screw Barrel
WPC screw barrels are designed for wood-plastic composite processing, where polymer is combined with wood flour/fiber and other additives. The material can be highly abrasive and moisture-sensitive.
Typical Applications
- Wood-plastic decking and profiles
- WPC sheets and boards
- WPC granulation/compounding
Materials & Construction
Wear-resistant metallurgy and suitable surface treatment are important because wood/mineral fillers can accelerate barrel and screw wear.
Engineering & Design Considerations
Design should address feeding, drying/degassing, controlled melting, mixing and pressure generation while limiting excessive shear and thermal degradation.
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10
PVC / CPVC Screw Barrel
PVC and CPVC processing requires screw/barrel geometry and metallurgy selected for the material's processing window. Twin conical and parallel systems are common in PVC applications.
Typical Applications
- Rigid PVC pipe and profile
- UPVC / RPVC extrusion
- CPVC specialty extrusion
Materials & Construction
Corrosion and wear resistance are important considerations because PVC formulations may contain additives that affect component life. Bimetallic and hardened options can be selected where appropriate.
Engineering & Design Considerations
Design considerations include compression profile, mixing intensity, temperature control, residence time and prevention of material degradation.
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11
Blown Film Screw Barrel
Blown-film screw barrels are designed to produce a homogeneous melt for film extrusion. Stable melting and controlled output are critical because melt uniformity affects film thickness and quality.
Typical Applications
- PE blown film
- Packaging film
- Agricultural and industrial films
Materials & Construction
Common designs include single-screw and barrier configurations. The correct screw depends on resin family, film specification and required output.
Engineering & Design Considerations
Key considerations include compression ratio, barrier design, mixing, output stability and thermal control.
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12
Injection Moulding Screw Barrel
Injection moulding screw barrels plasticize a measured shot of polymer and then convey and inject it into a mould. Screw geometry is selected to achieve repeatable melting, mixing and metering.
Typical Applications
- Injection moulding of thermoplastics
- General-purpose and engineering polymers
- Specialized molding applications
Materials & Construction
Manufacturer specifications vary widely; one published range lists screw diameters from 22 to 250 mm and offers EN41B/41CrMoAl7, bimetallic and carbide-based wear solutions.
Engineering & Design Considerations
Important parameters include screw diameter, L/D, compression ratio, check-ring arrangement, barrel bore, injection stroke and polymer-specific screw profile.
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13
Blow Moulding Screw Barrel
Blow-moulding screw barrels plasticize polymer for parison or extrusion-blow-moulding systems. Consistent melt quality and output are important for stable parison formation.
Typical Applications
- Extrusion blow moulding
- Bottles and hollow containers
- Industrial hollow products
Materials & Construction
Single-screw configurations are common, with metallurgy and surface treatment selected according to polymer and production duty.
Engineering & Design Considerations
Design should consider resin type, output, melt temperature, residence time and required parison stability.
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14
Recycling Screw Barrel
Recycling screw barrels are configured for recycled flakes, regrind or mixed post-industrial/post-consumer feedstock. Material variability can increase wear, contamination and volatile removal requirements.
Typical Applications
- Plastic recycling lines
- Regrind processing
- Reprocessed PE, PP and other thermoplastics
Materials & Construction
Wear-resistant and corrosion-resistant constructions can be considered depending on contaminants and fillers. Vented/decompression designs may be useful where moisture or volatiles are present.
Engineering & Design Considerations
Design should account for feedstock bulk density, contamination, moisture, filtration pressure, degassing and required throughput.
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15
Materials & Surface Treatments
| Material / Treatment | Description / Selection Consideration |
|---|
| EN41B / 41CrMoAl7 / 38CrMoAlA type nitriding steels | Common alloy-steel choices for screw and barrel components; suitable treatment and hardness depend on application. |
| Gas Nitriding | Creates a hardened diffusion layer to improve wear resistance. Published examples report approximately 0.5–0.7 mm nitrided depth for selected products. |
| Bimetallic Lining | Wear/corrosion-resistant alloy lining inside a steel barrel for demanding service. |
| HSS / Tool Steel Sleeve | High-hardness internal sleeve option for selected twin-barrel and high-wear applications. |
| Tungsten Carbide / HVOF-type Coating | High wear resistance for abrasive and filled compounds; process and coating system must be selected for the application. |
| Hard Chrome / Polishing | Surface finishing options used by some manufacturers to improve surface condition and wear/corrosion performance. |
16
Product Selection Checklist
- Machine manufacturer and model
- Screw diameter and effective length
- L/D ratio and screw profile
- Single, barrier, conical twin or parallel twin configuration
- Polymer / compound and filler percentage
- Required output and operating speed
- Operating temperature and pressure
- Presence of moisture, volatiles or corrosive additives
- Expected wear mechanism and service-life target
- Drawing, sample or existing component dimensions
- Required material grade, heat treatment and coating
- Quantity and delivery requirement
Technical Notes & Important Disclaimer
Product descriptions in this catalogue are technical summaries based on multiple public manufacturer and engineering sources. Dimensions, hardness, coating thickness, material grades and performance values are not universal standards; they vary by manufacturer, machine, polymer and design. Final selection should be confirmed against the machine drawing, polymer formulation and actual process conditions.
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Applications
Built for the machines
that build everything.
Our components run inside the plastics and rubber processing equipment industries depend on.
Injection Molding
Injection moulding screw barrels for injection molding machines of every make.
Pipe Extrusion
Single and twin screw-barrel sets built for PVC, HDPE and CPVC pipe lines.
Rubber Extrusion
Wear-resistant components engineered for the demands of rubber processing.
Pellet Extrusion
High-throughput screw and barrel systems for compounding and pelletizing.
Your machine. Our components.
Tell us your machine make, model and material — we'll match the right screw and barrel.
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About Us
A decade of
engineering excellence.
Serving the plastics and rubber processing industry since 2014, from Ahmedabad to the world.
8000mm
Maximum screw length
Ø16–450
Diameter range, mm
Quality
Every screw and barrel is manufactured from premium corrosion-resistant alloys and finished to tight tolerances — the reason our clients keep coming back.
Reliability
Strong core values and consistent delivery. Screw and barrel assemblies matched to your machine, shipped on short lead times.
Innovation
Bi-metallic coatings, nitriding and carbide treatments — designs that adapt to the demands of new materials and processes.
Work with a team that measures twice.
Precision isn't a slogan here — it's the spec sheet.
Get in touch
Contact
Ready when you are.
Send us your drawing or machine spec — we'll quote a precision-matched component, fast.
Global Footprint
Made in Ahmedabad.
Running worldwide.
Our screws and barrels power machines across India and East Africa.
Ahmedabad — HQ
India network (11 regions)
International — Ethiopia & Kenya
