JWELL integrates single-screw low-temperature plasticizing, tempering calibration, servo-driven twin-belt traction, and precision cut-to-length cutting into one continuous cold push extrusion line — delivering Φ5–300mm solid plastic bars and thick plates with minimal internal stress, superior flatness, and reduced material waste.
As the plastic thick plate processing industry shifts toward lower internal stress, higher flatness, and reduced material loss, the low-temperature cold push extrusion process has emerged as the preferred solution for producing solid plastic rods and heavy-gauge sheets. With advantages including minimal plate deformation, superior surface finish, and broad material compatibility — covering PP (polypropylene), PE (polyethylene), and PA6 (nylon 6) — the PP/PE/PA6 Cold Push Plate Crawler Production Line represents a significant upgrade over conventional extrusion methods.
JWELL Machinery, leveraging decades of extrusion technology innovation, has deeply integrated single-screw low-temperature plasticizing, tempering calibration, servo-driven twin-belt traction, and precision fixed-length cutting into one seamless production system. The result is a cold push extrusion line capable of continuously and stably producing solid plastic bars across the full Φ5–300mm diameter range. Operators can flexibly adjust traction speed, cutting length, and other parameters via a touchscreen HMI, significantly reducing downtime and raw material waste during grade or specification changeovers.
This material system has achieved full-scenario coverage — from essential consumer goods to strategic emerging industries — playing an irreplaceable role across every link of industrial manufacturing and daily life.
NO.1 — High-Efficiency Low-Temperature Extrusion Main Unit
JWS50/28 Dedicated Single-Screw Extruder — Optimized for Cold Push Processing
At the heart of the line sits the JWS50/28 single-screw extruder, purpose-built with a custom-designed screw geometry tailored to the cold push extrusion process. This specialized design enables precise low-temperature plasticizing of PP, PE, and PA6, effectively preventing thermal degradation and yellowing — a common issue with nylon materials processed at excessive temperatures. The result is uniform, stable melt output ideal for thick plate and solid bar forming.
Temperature Control & Throughput:
Barrel temperature management via 4-zone ceramic heating (16 kW total) paired with forced-air cooling for dual-mode precision control.
Alloy-steel screw (hardness ≥ HV740) matched with a honed barrel (hardness ≥ HV940) ensures strict melt-temperature window control, minimizing residual stress at the source.
Output capacity: 15–25 kg/h, optimized for cold push plates up to 650mm width.
Screw Ø50mm L/D 28:1 4-Zone Heating HV740+ Screw 15–25 kg/h
This low-temperature single-screw extrusion system is engineered to handle the unique rheological demands of thick-gauge PP, PE, and PA6 sheets — where traditional high-temperature extrusion would introduce excessive thermal stress, warpage, and surface defects.
NO.2 — Low-Temperature Tempering & Precision Calibration Process
Closed-Loop Tempering Calibration for Dimensional Stability
A dedicated tempering calibration plate system with precision temperature control is configured specifically for the low-temperature setting characteristics of PP, PE, and PA6 thick plates. This ensures consistent finished-product dimensions and high flatness — critical quality attributes for industrial thick plate applications.
Calibration Plate Specifications:
700 × 850 × 70 mm (45# carbon steel) — for standard-width products.
1700 × 850 × 70 mm (aluminum alloy) — for wide-format thick plates.
Approximately 4 zones of aluminum-block heating with independent temperature control, perfectly matched to the extruder output.
Multi-Cavity Die System:
Simultaneous multi-strand output configurations: 1×16 / 1×12 / 1×10 / 1×6 / 1×4.
Covers the full Φ5–300mm bar/rod diameter range.
Traction speed adjusts in real time to match melt flow rate for consistent product dimensions.
Continuous Closed-Loop Production
The line achieves true end-to-end continuous operation: Extrusion → Tempering Calibration → Servo Traction → Precision Cutting — eliminating intermediate handling steps, reducing labor, and ensuring consistent batch-to-batch quality for solid plastic bar production.
NO.3 — Dual-Belt Servo Traction & Conveying System
Independent Upper/Lower Servo Drive with Flexible Clamping
Purpose-developed for cold push thick plate handling, the twin-belt servo traction system features independent upper and lower servo motors (Inovance, 0.85 kW each). Wear-resistant silicone grip blocks backed by internal steel plates provide flexible, scratch-free clamping — critical for preserving the surface quality of PP, PE, and PA6 plates.
Key Specifications:
Pneumatic clamping pressure adjustable via precision regulator and pressure gauge, accommodating different bar diameters and material hardness.
Screw-lift frame: lower traction center height 1050 mm, opening/closing gap 150 mm — compatible with Φ5–300mm bars.
Maximum traction speed: 60 mm/min, with dual control from touchscreen HMI and electrical cabinet, synchronized with downstream cutting unit.
Ensures uniform, steady conveying without slippage or surface marring.
Dual Servo 0.85kW×2 Max 60 mm/min Φ5–300mm Range Silicone Grip Blocks
Learn more about our servo-driven traction and conveying solutions designed for precision plastic profile and plate handling.
NO.4 — Auxiliary Material Supply System
Automated Drying & Conveying for Continuous Operation
Consistent material quality is essential for stable low-temperature cold push extrusion. The auxiliary supply system comprises:
100 kg hot-air drying hopper: efficiently dehumidifies PP, PE, and PA6 resin pellets to the required moisture content — especially critical for hygroscopic nylon (PA6) materials.
100 kg/h vacuum auto-loader: negative-pressure automatic conveying reduces manual refilling frequency, ensuring uninterrupted material feeding and true continuous production.
The entire system features an integrated compact footprint with low energy consumption and reduced noise levels — contributing to a cleaner, more operator-friendly shop-floor environment.
Explore our range of plastic extrusion auxiliary equipment including drying, dosing, and material handling solutions.
NO.5 — Precision Fixed-Length Cutting & Automatic Stacking Unit
±1mm Cutting Accuracy with Automated Stacking
The final stage of the PP/PE/PA6 Cold Push Plate Crawler Production Line ensures finished products are cut to exact specifications and automatically stacked — ready for quality inspection and dispatch:
Servo-driven encoder precision metering: cutting length error controlled within ±1 mm.
Saw motor with VFD speed control and lead-screw synchronized lifting/lowering cutting table — compatible with plates up to 150 mm thickness.
Integrated sawdust collection tray for a cleaner work environment.
Post-cutting plates automatically conveyed to an integrated stacking rack — reducing manual handling, increasing automation levels, and lowering per-unit labor cost.
±1mm Accuracy Max 150mm Thickness Auto Stacking Sawdust Collection
See our full portfolio of precision cutting and automatic stacking systems for plastic extrusion lines.
JWELL Machinery — A Global Leader in Plastic Extrusion Technology
As a benchmark enterprise in China’s plastic extrusion sector, JWELL Machinery drives industry advancement through global presence and continuous technological innovation. Today, the company has established eight modern manufacturing bases and a network of over thirty specialized subsidiaries, forming a comprehensive industrial matrix spanning R&D, manufacturing, and service. Our products — recognized for their reliable performance, mature process technology, and energy-efficient advantages — are exported to over 120 countries and regions, making JWELL a trusted plastic extrusion solutions provider for customers worldwide.
JWELL Machinery remains driven by technological innovation and guided by customer needs. Whether in traditional plastic processing scenarios or emerging material application fields, we deliver tailored, intelligent, and specialized plastic extrusion production lines that meet the demands of modern manufacturing.
Frequently Asked Questions
Q: What materials can the Cold Push Plate Crawler Production Line process?
A: The line is engineered for PP (polypropylene), PE (polyethylene), and PA6 (nylon 6), covering a broad spectrum from commodity plastics to engineering thermoplastics. The low-temperature cold push extrusion process is especially advantageous for nylon materials that are prone to thermal degradation at elevated temperatures.
Q: What is the diameter range for solid plastic bar production on this line?
A: The multi-cavity die system supports full-range solid bar production from Φ5mm to Φ300mm, with configurable strand counts (up to 16 strands simultaneously) depending on the target diameter. Traction speed is automatically synchronized with melt output for consistent dimensional accuracy.
Q: Why choose low-temperature cold push extrusion over conventional high-temperature extrusion for thick plates?
A: Low-temperature cold push extrusion significantly reduces internal thermal stress in thick-gauge products, resulting in superior flatness, minimal warpage, better surface finish, and lower scrap rates. It also prevents material degradation — particularly critical for engineering plastics like PA6 — and reduces overall energy consumption compared to high-temperature processes.
Q: What is the production capacity and energy consumption of this line?
A: The JWS50/28 extruder delivers 15–25 kg/h output (material-dependent), with a 16 kW heating system across 4 controlled zones. The integrated compact design, energy-efficient servo drives, and low-temperature process philosophy collectively contribute to lower energy consumption per kilogram of finished product.
Q: Can the cutting length be adjusted during production?
A: Yes. Cutting length, traction speed, and other operational parameters are adjustable in real time via the touchscreen HMI or electrical cabinet controls. The servo encoder-based metering system maintains ±1mm precision across the full adjustable range, and changeover between specifications requires minimal downtime.
Post time: Jul-27-2026