Cone Twin Screw and Barrel for SPC Flooring Extrusion Machine
Romeroca cone twin screw and barrel is designed for SPC flooring extrusion machines that process high-filler PVC compounds, calcium carbonate, stabilizer, lubricant, recycled SPC powder and other rigid core flooring materials. It is a key consumable spare part for the extruder, directly affecting plasticizing quality, output stability, board density, surface flatness and machine service life.
Romeroca supplies standard and customized conical twin screw and barrel sets for SPC flooring extrusion lines, including 92/188 and 110/220 models. The screw compression ratio, nitriding layer, alloy protection and barrel heating structure can be adjusted according to the customer’s raw material formula, target output and extrusion machine configuration.
What Is a Conical Twin Screw and Barrel?
A conical twin screw and barrel is the core plasticizing and conveying component of a conical twin screw extruder. In SPC flooring production, the screw pair rotates in opposite directions to convey, compress, heat, plasticize and discharge the high-calcium PVC compound into the T-die and calendering section.
Because SPC flooring uses a high proportion of CaCO3 and rigid PVC materials, the screw and barrel must resist abrasion, corrosion, high torque load and long operating hours. Proper screw design helps improve mixing uniformity, reduce material retention, stabilize output and extend the working life of the extrusion machine.
Standard Cone Twin Screw and Barrel Specifications
Romeroca standard specifications cover common SPC flooring extrusion models. Customization is available according to the customer’s extruder, raw material formula, production output and product structure. The screw compression ratio can be designed according to different raw materials and finished product requirements.
| Standard Specifications and Custom Design | |
|---|---|
| The above are standard specifications. Romeroca can customize screw and barrel dimensions according to customer requirements. The compression ratio of screws can be designed according to different raw materials and products. | |
| 92/188 | 110/220 |
Materials and Surface Treatment Options
Material selection and surface treatment are critical for SPC flooring extrusion because high-filler compounds can accelerate screw and barrel wear. Romeroca can recommend nitriding, chrome plating, bimetal alloy spraying, stainless steel, high-frequency quenching or high-temperature hardening according to the customer’s formulation and production load.
| Raw Material | Finished Product Processing Requirements |
|---|---|
| 38CrMoAlA, SACM645, 42CrMo | Nitriding Treatment |
| 42CrMo, AISI 4140 | Chrome Plating Hardness Layer |
| 4Cr5MoSiV1, SKD-61, SKD-11 | Spraying Bimetal Alloy Layer and Nitriding Treatment |
| HPM38, SI36, SUS440, 9Cr18MoV | Stainless Steel / High Frequency Quenching |
| GHII3 | Natural Hardening After High Temperature |
Screw and Barrel Parameter Details
The following parameter table keeps the original Romeroca product data and reorganizes it for clearer factory purchasing and technical comparison. Buyers can use these parameters to match the screw barrel set with existing SPC flooring extrusion equipment.
| No. | Parameter | 92/188 Specification |
|---|---|---|
| 1 | Screw Diameter | 92/188 |
| 2 | Screw Hardness | HV760 |
| 3 | Barrel Hardness | HV940 |
| 4 | Material | 38CrMoAl |
| 5 | Thickness of Screw Nitriding Layer | 0.4–0.6 mm |
| 6 | Thickness of Barrel Nitriding Layer | 0.4–0.6 mm |
| 7 | Number of Screws | 2 |
| 8 | Screw Rotating Direction | Converse Direction |
| 9 | Barrel Heating Zones | 5 |
| 10 | Heating Power | 60 kW |
| 11 | Barrel Cooling | 2.2 kW |
| 12 | Feeding Mode | Automatic Forced Convey |
| 13 | AC Motor | 110 |
| 14 | AC Transducer | TECO / ABB |
| 15 | Exhaust Vacuum Pump | 5.5 kW |
| 16 | Hopper Material | Stainless Steel |
| 17 | Output | 500–700 kg/hr |
| 18 | Style | Horizontal Fixing |
| No. | Parameter | 110/220 Specification |
|---|---|---|
| 1 | Screw Diameter | 110/220 |
| 2 | Screw Hardness | 58–65 HRC |
| 3 | Material | 38CrMoALA |
| 4 | Screw Straightness | 0.015 mm |
| 5 | Thickness of Barrel Nitriding Layer | 0.6–0.7 mm |
| 6 | Thickness of Screw Nitriding Layer | 0.5–0.8 mm |
| 7 | Heating Power | 62 kW |
Why Screw and Barrel Quality Matters in SPC Flooring Extrusion
Improves plasticizing stability for high-calcium SPC rigid core formulas.
Supports more uniform material mixing and better extrusion output consistency.
Reduces wear caused by CaCO3 filler, recycled powder and long production cycles.
Helps maintain stable board density, sheet thickness and surface flatness.
Allows compression ratio design based on raw materials, output target and finished product type.
Supports matching with 92/188 and 110/220 SPC flooring extrusion machines.
Can use nitriding, chrome plating or bimetal alloy layers for wear resistance and longer service life.
Reduces downtime and spare part replacement risk when used with correct maintenance and process control.
Custom Design Options for SPC Flooring Extrusion
| Customization Item | Available Direction | Factory Benefit |
|---|---|---|
| Screw Size | 92/188, 110/220 and customized dimensions | Matches existing extrusion machine and production output. |
| Compression Ratio | Designed according to SPC formula and product structure | Improves plasticizing, mixing and output stability. |
| Material | 38CrMoAlA, SKD-61, SKD-11, 42CrMo and other alloy steels | Balances cost, wear resistance and production life. |
| Surface Treatment | Nitriding, chrome plating, bimetal alloy spraying or quenching | Improves hardness, corrosion resistance and wear protection. |
| Heating and Cooling | Barrel heating zones, cooling power and temperature control matching | Helps maintain stable melt temperature and sheet forming quality. |
How to Select the Right Screw and Barrel for SPC Extrusion
Confirm your extrusion machine model, such as 92/188 or 110/220.
Provide raw material formulation, including PVC resin, CaCO3 ratio, stabilizer, lubricant and recycled material percentage.
Confirm target output, board thickness, board width and expected production hours per day.
Check current wear condition, plasticizing problem, output instability or board quality issue.
Select nitriding, bimetal alloy, chrome plating or special material based on wear level and budget.
Ask Romeroca to match screw design, barrel treatment and spare part support with the complete SPC flooring production line.
What Romeroca Offers for SPC Flooring Extrusion Projects
SPC Flooring Extrusion Spare Parts
Romeroca supplies cone twin screw and barrel, heater for extrusion barrel, confluence core, T-die, surface rollers, embossing rollers, rubber rollers and other key spare parts for SPC flooring extrusion machines.
Complete SPC Flooring Production Line
Romeroca can provide mixing machine, crushing and milling machine, SPC flooring extruder, UV coating machine, cutting machine, click slotting machine, V-groove painting machine, IXPE/EVA lamination machine and packing machine.
Raw Materials and Technical Support
Romeroca can support PVC SG5, stabilizer, ACR, CPE, PVC lubricant, PE wax, wear-resistant layer, PVC decor film, IXPE/EVA underlayment, UV paint and related flooring material sourcing.
Why Choose Romeroca as Your Screw and Barrel Supplier?
Romeroca is a professional sales and technology service company dedicated to the flooring industry. Headquartered in Changzhou, Jiangsu, China, Romeroca supports overseas flooring factories with production lines, flooring raw materials, spare parts and technical services.
15 years of flooring industry experience.
Headquarter in Changzhou, Jiangsu, China, with branches in Hong Kong and Vietnam.
Laminate flooring and PVC flooring products exported to customers in 82 countries.
One-stop support since 2015 for overseas flooring factories, including production line, raw materials and technical services.
Support for product consultancy, inspection, new product development and strategic purchasing analysis.
36 months of after-sales service and strategy support for partner factories.
Frequently Asked Questions About Cone Twin Screw and Barrel
What is a cone twin screw and barrel for SPC flooring extrusion?
A cone twin screw and barrel is the main plasticizing and conveying component of a conical twin screw extruder. In SPC flooring production, it processes PVC resin, calcium carbonate and additives into a stable melt for sheet extrusion and calendering.
Which screw and barrel models does Romeroca supply?
Romeroca supplies common SPC flooring extrusion screw and barrel models such as 92/188 and 110/220. Custom sizes can also be designed according to the customer’s extruder and production requirements.
Why is nitriding treatment important for screw and barrel?
Nitriding treatment increases surface hardness and wear resistance. For SPC flooring extrusion, this is important because high calcium carbonate content can accelerate abrasion inside the screw and barrel.
When should a factory use bimetal alloy screw and barrel?
Bimetal alloy protection is recommended when the SPC formula contains high filler, recycled material, abrasive additives or when the factory runs long production shifts. It helps improve wear resistance and service life.
Can the screw compression ratio be customized?
Yes. Romeroca can customize the screw compression ratio according to raw material formula, SPC board thickness, output requirement and finished product type. Proper compression design helps improve plasticizing and extrusion stability.
How does screw and barrel wear affect SPC flooring quality?
Worn screw and barrel parts can cause unstable output, poor plasticizing, material backflow, uneven sheet density, surface defects and higher energy consumption. Regular inspection and timely replacement help maintain stable flooring quality.
What information should I provide before ordering?
Buyers should provide the extruder model, screw size, current screw drawing or photos, raw material formula, target output, existing wear problem and required surface treatment. This helps Romeroca recommend the correct screw and barrel solution.
Can Romeroca supply screw and barrel with other SPC line spare parts?
Yes. Romeroca can supply screw and barrel together with extrusion heaters, confluence core, T-die, rollers, PCD cutters, UV lamps, mixer blades, crusher blades, mill blades and other SPC flooring production line spare parts.
