Project Type
Complete Extrusion Line
Machines
Dosing & Feeding Equipment, Extruder, Haul-Off Machine, Pipe Cutting Machine, Spray Cooling Tank, Vacuum Calibration Tank
Material
Nylon, PA
Application
Agricultural Irrigation, Cable Protection, Drainage & Sewage, Gas Distribution, Industrial Pipes, Water Supply
Region
Asia-Pacific, Europe, Latin America, Middle East and Africa, North America
QTech-Machinery supplied a customized nylon tube extrusion line for a customer producing PA tubes for industrial and automotive applications. The customer required a complete production system that could process nylon material continuously and deliver stable tube diameter, smooth surface quality, accurate cutting length, and efficient downstream automation.
This project focused on building a reliable PA tube production line rather than purchasing separate machines from different suppliers. QTech-Machinery provided an integrated solution covering extrusion, forming, vacuum sizing, water cooling, servo traction, precision cutting, conveying, and finished product collection.
The complete line included an SJ65/28 single screw extruder, customized tube die, vacuum calibration cooling tank, immersion cooling tank, servo belt haul-off, rotary flying knife cutter, conveyor, and stainless steel collection system.
This case is suitable for buyers searching for nylon tube extrusion line, PA tube production line, nylon pipe extruder, plastic tube extrusion machine, PA6 PA12 tube extrusion machine, and automatic nylon tube cutting line.
The customer wanted a stable and efficient extrusion production line for continuous nylon tube manufacturing. Their main goal was to improve product consistency, reduce manual handling, and increase automation in downstream processing.
Main requirements included:
1. Continuous production of nylon tubes and PA tubes
2. Stable plasticizing performance for nylon material
3. Accurate outer diameter and roundness control
4. Smooth tube surface after extrusion
5. Reliable vacuum calibration and cooling
6. Stainless steel water-contact components
7. Servo-driven haul-off for stable line speed
8. Automatic cutting with high length accuracy
9. Conveyor transfer after cutting
10. Neat finished tube collection
11. PLC and HMI touch screen control
12. Easy operation and maintenance
13. Suitable for long-term industrial production
The customer also requested a complete supplier solution, including machine configuration, line integration, test running, and technical support.
QTech-Machinery designed a complete nylon tube extrusion production line according to the customer’s tube specification, nylon material characteristics, required output, cutting length, factory layout, and local power supply.
The solution covered the complete production process:
1. Nylon material feeding and plasticizing
2. Tube extrusion through customized die tooling
3. Vacuum calibration for diameter control
4. Primary water cooling in the vacuum tank
5. Secondary cooling in the immersion tank
6. Servo belt haul-off for synchronized traction
7. Rotary flying knife cutting for fixed-length tubes
8. Conveyor transfer after cutting
9. Air-assisted discharging into collection trough
10. Centralized operation through Siemens PLC and HMI
This integrated design helped the customer achieve stable tube quality, efficient production flow, and reduced manual operation.
The SJ65/28 single screw extruder is the main plasticizing unit of the nylon tube extrusion line. It melts, homogenizes, and conveys nylon material to the extrusion die.
Specific configurations:
1. Extruder model: SJ65/28 single screw extruder
2. Processing material: nylon / PA material for tube production
3. Screw diameter: 65mm
4. Screw L/D ratio: 28:1
5. Output capacity: 0–60kg/h, depending on material and tube size
6. Main motor: 37KW permanent magnet synchronous servo motor
7. Screw and barrel material: 38CrMoALA with nitriding treatment
8. Heating zones: 5 barrel heating zones
9. Heating method: ceramic heating bands
10. Control system: Siemens PLC with HMI touch screen
Advantages:
The extruder provides stable nylon melting and continuous output. The servo motor improves speed control and energy efficiency, while the nitrided screw and barrel offer good wear resistance for long-term production.
The extrusion die forms molten nylon into a continuous tube. The die tooling was customized according to the customer’s tube diameter, wall thickness, and production requirements.
Specific configurations:
1. Die type: customized nylon tube extrusion die
2. Application: PA tube and plastic tube forming
3. Matching extruder: designed for SJ65/28 extruder connection
4. Flow channel: optimized melt flow design
5. Forming method: continuous tube extrusion forming
6. Tube shape: round tube production
7. Wall thickness control: adjusted through tooling and line speed matching
8. Sizing compatibility: matched with vacuum calibration sleeve
9. Processing method: precision-machined die components
10. Customization: designed according to customer tube specification
Advantages:
The customized die helps achieve stable tube shape, better wall thickness uniformity, and smoother surface quality. Proper die matching also reduces pressure fluctuation during continuous production.
The vacuum calibration tank is used for initial tube sizing and cooling. It helps maintain tube outer diameter, roundness, and dimensional consistency immediately after extrusion.
Specific configurations:
1. Tank dimension: 4500 × 230 × 235mm
2. Vacuum calibration length: 4000mm
3. Tank material: 304 stainless steel
4. Stainless steel thickness: 2mm
5. Vacuum pump power: 2.2KW
6. Water pump power: 1.5KW stainless steel water pump
7. Vacuum range: 0 to -50KPa
8. Vacuum control precision: ±0.1KPa
9. Tank cover: tempered glass cover
10. Adjustment structure: front/back, left/right, and up/down adjustment
Advantages:
The vacuum tank provides accurate tube calibration during the early cooling stage. Electronic vacuum control helps keep the tube diameter stable, while the stainless steel structure improves durability and cleanliness.
The immersion cooling tank provides secondary cooling after vacuum calibration. It helps stabilize the nylon tube shape before traction and cutting.
Specific configurations:
1. Cooling tank type: immersion water cooling tank
2. Tank dimension: 6000 × 230 × 235mm
3. Tank material: 304 stainless steel
4. Stainless steel thickness: 2mm
5. Cooling method: full immersion water cooling
6. Water circulation: equipped with circulating water connection
7. Guide system: adjustable guide rollers
8. Function: further cooling and shape stabilization
9. Installation position: after vacuum calibration tank
10. Structure: compact and easy-clean stainless steel design
Advantages:
The 6-meter cooling tank provides enough cooling distance for nylon tube stabilization. The stainless steel design helps prevent corrosion and supports long-term industrial operation.
The servo belt haul-off machine pulls the nylon tube forward at a stable speed. It works together with the extruder and cutter to maintain consistent production flow.
Specific configurations:
1. Haul-off type: servo belt haul-off
2. Drive system: dual servo motor structure
3. Servo motor power: 1KW × 2
4. Speed range: 0–40m/min
5. Belt material: wear-resistant polyurethane belt
6. Pulling method: upper and lower belt clamping traction
7. Speed adjustment: controlled through PLC and HMI
8. Synchronization: matched with extrusion output and cutter speed
9. Application: nylon tube and plastic tube traction
10. Function: stable pulling without damaging tube surface
Advantages:
The servo haul-off provides accurate speed control and stable traction force. It helps reduce tube deformation, diameter fluctuation, and wall thickness variation.
The rotary flying knife cutter cuts the nylon tube continuously without stopping the extrusion process. It is suitable for fixed-length tube production.
Specific configurations:
1. Cutter type: rotary flying knife cutter
2. Cutting method: continuous online cutting
3. Drive motor: 1.8KW servo motor
4. Cutting accuracy: ±0.5mm
5. Control mode: servo synchronized control
6. Length setting: adjustable through HMI
7. Cutting application: nylon tube and plastic tube cutting
8. Matching system: synchronized with haul-off speed
9. Operation style: automatic fixed-length cutting
10. Safety design: integrated machine control and protection system
Advantages:
The flying knife cutter improves production efficiency because it cuts during continuous line operation. Servo control ensures accurate cutting length and stable finished product quality.
The conveyor and collection system transfers the cut tubes and collects them neatly. This reduces manual handling and improves production organization.
Specific configurations:
1. Conveyor length: 3000mm
2. Conveyor function: transfers tubes after cutting
3. Speed control: adjustable conveyor speed
4. Collection method: automatic discharge into trough
5. Discharge assistance: air blowing device
6. Collection trough material: SUS304 stainless steel
7. Product handling: suitable for finished nylon tubes
8. Installation position: after rotary cutter
9.Labor reduction: reduces manual pickup frequency
10. Final output: organized tube collection for packing
Advantages:
The automatic collection system makes the downstream process cleaner and more efficient. It improves finished tube handling and helps operators manage production more easily.
Complete Nylon Tube Extrusion Line for PA Pipe Manufacturing
After test running and commissioning, the nylon tube extrusion line operated continuously through the complete production process, including extrusion, vacuum calibration, cooling, servo haul-off, rotary cutting, conveying, and collection.
Based on the available evidence, the line demonstrated stable material extrusion, smooth tube movement through the cooling tanks, synchronized traction and cutting, and automatic transfer of finished tubes to the collection system.
The Siemens PLC and HMI interface allowed operators to set and monitor key production parameters during operation. The servo-driven haul-off and flying knife cutter worked together to support continuous fixed-length cutting.
The available photos and video evidence show that the complete line was assembled, tested, and capable of producing finished nylon tubes through the full production workflow.
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