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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.
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
