Tel : +86-13812850975 E-mail : info@winsoarst.com
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Main Description
Single screw and barrel are suitable for the production of various products, including ABS sheets, soft and rigid PVC pipes, cables, blown films, cast films, blow-molded articles, profiles, and tubing.
The extruder screw and barrel serves as the core component of extrusion molding equipment; classified as an industrial product, it performs the critical functions of material conveyance, melting and plasticization, and mixing homogenization.
As a pivotal component of the extruder, the screw requires materials that possess specific characteristics: high-temperature resistance, wear resistance, corrosion resistance, and high mechanical strength. Furthermore, these materials must exhibit excellent machinability, minimal residual stress following heat treatment, and low thermal deformation.
Given that screw materials must withstand heat, abrasion, and corrosion, the manufacturing process typically involves heat treatment—specifically surface chrome plating or nitriding. Commonly utilized materials include 45# steel and chromium-molybdenum-aluminum alloy steels.
Direct answer: A single screw and barrel is the main plasticizing assembly in a single screw extruder. The screw conveys, melts, mixes and builds pressure while the barrel supports heating, cooling and controlled melt flow. A suitable replacement must match the extruder dimensions, polymer, filler level, product section, operating temperature and target output.
Stable extrusion depends on the relationship between screw geometry, barrel bore, temperature control, die resistance and downstream calibration or cooling. The same screw diameter can require a different design for pipe, profile, sheet, board, film or pelletizing because the feed, compression, mixing and metering requirements are different.
Thermoplastic pipe extrusion when the screw design is matched to the pipe material and diameter range.
PVC, PE or PP profile, sheet and board projects with compatible formula and die resistance.
Film, filament or granulation applications when the screw structure and temperature window are designed for that process.
Replacement projects using an original drawing, machine model, sample or measured worn part.
Data | Reason for Confirmation |
|---|---|
Machine model, screw diameter and length | Confirms installation dimensions, drive connection and barrel envelope. |
Polymer, filler and additives | Controls melting behavior, mixing demand, corrosion and abrasion risk. |
Product section and die | Determines the required conveying, compression, mixing and metering behavior. |
Target output and line speed | Helps confirm the screw design and thermal-control requirements. |
Wear and surface condition | Indicates whether repair, coating or a new matched set should be considered. |
For a practical quotation, send the extruder brand and model, screw diameter and length, barrel inner diameter and length, material formula, filler ratio, target output, product drawing, operating temperature, surface-treatment requirement, delivery destination and clear photos of the existing screw and barrel. If a drawing is unavailable, a measured sample and machine nameplate can help start the review.
No. Screw geometry and surface treatment should be matched to the polymer, additives, filler level, temperature and finished product. A general-purpose design may not be suitable for every application.
Common contributors include abrasive filler, glass fiber, corrosive additives, unsuitable clearance, unstable processing conditions and insufficient maintenance. The actual cause should be confirmed from the material and worn-part inspection.
Check the machine model, screw diameter and length, drive connection, barrel bore, centerline, cooling arrangement, polymer, filler content, output target and the original drawing or sample.
See the Extruder Screw and Barrel category, Single Screw Extruder category, bi-metallic alloy screw and barrel and conical twin screw and barrel pages for related options.
A single screw and barrel assembly is selected as a matched pair for the actual extruder and product. The screw conveys, melts, mixes and meters the polymer while the barrel provides the heated and cooled working chamber. A screw diameter alone is not enough to define a replacement because pipe, profile, sheet, board, film and pelletizing projects can require different screw geometry and compression behavior.
Extrusion application | Selection focus |
|---|---|
PE or PP pipe and profile | Stable conveying and melt output, product section, die resistance and target production rate. |
PVC or other rigid thermoplastic | Material compatibility, temperature window, corrosion conditions and suitable screw surface treatment. |
Sheet, board or film | Mixing, melting uniformity, pressure stability and die width or output requirement. |
Pelletizing or recycling | Feed condition, contamination, filtration, venting, wear risk and required throughput. |
The existing product information covers screw diameters from approximately 15mm to 300mm. The practical specification must still be confirmed from the machine drawing, screw length, flight geometry, barrel bore, centerline, drive connection and cooling arrangement. The final design may include a different feed section, compression section, mixing section or metering section depending on the polymer and finished product.
Screw diameter and length: define the installation envelope, volume and residence time.
Flight and section geometry: affects conveying, melting, mixing, pressure and output stability.
Barrel bore and connection: must match the screw clearance, extruder frame and die-side assembly.
Surface treatment: should reflect abrasion, corrosion, filler and glass-fiber conditions.
Heating and cooling zones: influence the processing temperature and melt stability.
PVC, PE, PP, filled compounds, recycled material and glass-fiber-reinforced formulations do not impose the same wear or plasticizing conditions. Calcium carbonate, glass fiber, mineral filler, corrosive additives and contamination can change the suitable working-layer material and screw geometry. The material formula and filler ratio should be reviewed before a replacement is quoted.
Process condition | Why it matters |
|---|---|
Abrasive filler or glass fiber | May increase flight and barrel wear and require a suitable wear-resistant treatment. |
Corrosive additives or PVC processing | May require corrosion-resistant material or surface treatment after process review. |
Recycled or contaminated feed | Can increase unstable feeding, foreign-particle wear and pressure fluctuation. |
High output or high temperature | Requires confirmation of screw geometry, thermal control and cooling capacity. |
Replacement should be considered when wear causes unstable output, lower pressure, poor mixing, higher energy demand, abnormal leakage or difficulty maintaining product dimensions. A worn screw or barrel should be measured together because excessive clearance between the two parts can reduce plasticizing efficiency. Repair, coating or a new matched set should be decided after checking the actual wear and process requirements.
Confirm the extruder brand, model, screw diameter, screw length and drive connection.
Record the barrel bore, barrel length, centerline, heating zones and cooling arrangement.
Provide the polymer, filler ratio, additives, product section, output target and operating temperature.
Send the original drawing, nameplate, dimensional measurements or clear photos of the worn parts.
Check the proposed geometry, material, surface treatment and installation dimensions before production.
After installation, confirm clearance, temperature control, feeding, output and product quality during commissioning.
For a practical quotation, send the extruder model and brand, screw diameter and length, barrel inner diameter and length, polymer and filler formula, product type, target output, operating temperature, surface-treatment requirement, delivery destination and available drawing or worn sample. If the drawing is unavailable, the machine nameplate and measured photographs can help start the technical review.
Winsoar will use these details to evaluate screw geometry, barrel bore, clearance, material, surface treatment, connection dimensions and process suitability instead of supplying a generic screw and barrel based only on diameter.
Specifications
Specification:
Screw diameter:Ø15-Ø300
Aspect ratio:15-46
Product type:
For different plastic products screw can be used: ordinary type, pin type, barrier type, separation type, exhaust type and so on.
Base material:
1)38CrMoAlA(JIS SACM645)
2)42CrMo(AISI 4140)
Process:
Heat treatment
Nitriding treatment
Technical Parameters:
Nitriding depth | 0.50mm-0.80mm |
Nitriding hardness | 900-1000HV |
Nitriding | <= Level 1 |
Surface roughness | Ra 0.4 |
Screw straightness | 0.015mm |
hardness after chrome plating | ≥950HV |
Chromium layer thickness | 0.025~0.085mm |
Factory & Shipment
