Product Description
Manufactured within our heavy metallurgical machinery facility in Jingjiang, our Recoiler Machine is an industrial-duty tension coiler system engineered to tightly wind cold- and hot-rolled steel strip into uniform, edge-aligned coils across rolling mills and finishing processing lines. Drawing upon 26 years of heavy fabrication experience and serving premier steel producers including POSCO, Shagang, and Baowu, we construct each Recoiler Machine using precision-machined solid drums, four-pyramid expanding mandrels (wedge angle α = 7°45'), or octagonal eight-wedge mandrels (α = 12°45' / 16°4351') that expand into a true circle. By maintaining controlled winding tension, continuous edge alignment, and automatic coil discharge, this high-performance Recoiler Machine prevents loose outer wraps, telescoping, and surface abrasion, providing strip producers with a durable, high-tension coiling core built for continuous heavy service.
Applications
Cold Strip Rolling Mills: Coiling high-strength steel strip under high winding tension at reversing and tandem mill exits.
Continuous Pickling & Galvanizing Lines: Recoiling processed strip into finished master coils.
Coil Slitting & Cut-to-Length Lines: Rewinding multiple slit strands onto partitioned expandable mandrels.
Skin-Pass & Temper Mills: Re-winding tempered strip while preserving flatness and surface texture.
Technical Specifications
|
Design Standards |
Cold & Hot Strip Processing Machinery Standards, ISO 9001, JB/T 5000 |
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Mandrel Structural Types |
Solid drum (high tension), 4-pyramid expandable mandrel, or 8-pyramid octagonal true-circle expandable drum |
|
Coil Weight Capacity |
5 to 35 metric tons per coil |
|
Coil Inner Diameter (ID) |
Standard Ø508 mm or Ø610 mm (Custom expansion ranges) |
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Coil Outer Diameter (OD) |
800 mm to 2,200 mm; Strip width: 600 mm to 2,200 mm |
|
Strip Thickness Range |
0.15 mm to 12.0 mm |
|
Winding Speed |
Up to 900 m/min |
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Winding Tension Capacity |
Up to 350 kN (Controlled via vector AC/DC motor drives) |
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Mandrel Outboard Support |
Hydraulic swing-away bearing gate for cantilever load support during high-tension winding |
|
Strip Gripper Slot |
Integrated hydraulic jaw clamp to anchor the strip head securely into the mandrel body |
Customization Capabilities
Octagonal True-Circle Drum Design: Eight-wedge mandrel configurations that fill inter-segment gaps upon expansion, forming a continuous circular circumference that prevents inner-wrap bending marks on critical automotive sheets.
Integrated Coil Unloading Cars: Matching hydraulic coil discharge cars with tilting V-saddles and mast guides for smooth coil extraction.
Automatic Edge-Position Control (EPC): Base-mounted hydraulic cylinders that shift the recoiler frame laterally to produce flush coil sidewalls.
Overhead Snubber Roll & Push-Off Plate: Hydraulic push-off plates to strip the completed coil off the collapsed mandrel, paired with overhead hold-down rolls.
Zero MOQ Restriction: Custom engineered for individual coiler retrofits or delivered as complete processing-line packages.
Quality Control
Manufacturing Accreditations: ISO 9001:2015, ISO 14001:2015, and ISO 3834-2 welding quality management.
Full Process QR Code Traceability: Forged alloy shafts, pyramid wedge slides, hydraulic rotating unions, and outboard gate assemblies carry individual QR codes linked to certified test records.
Non-Destructive Testing: 100% Ultrasonic Testing (UT) on forged alloy main shafts (42CrMo); Magnetic Particle Testing (MT) on welded frames and segment slides.
Shop Load & Expansion Testing: Factory testing verifying hydraulic mandrel collapse/expansion strokes, radial runout (within 0.05 mm), and rotational balancing.
Heavy Ocean Packaging: Steel transport bases, greased machined surfaces, outboard bearing clamp restraints, and moisture barrier wrapping.
FAQ
Q: What is the main advantage of an octagonal 8-pyramid mandrel over a standard 4-wedge mandrel?
A: Standard 4-wedge mandrels leave gaps between segments when expanded, which can leave press marks on the inner wraps of thin or high-finish sheet. An octagonal 8-wedge design fills those gaps with insert wedges, expanding into a continuous circle that protects strip inner wraps.
Q: What is the typical fabrication lead time for a custom recoiler machine?
A: Manufacturing, precision mandrel machining, and shop assembly typically require 4 to 6 months from drawing approval to dispatch.
Q: What warranty coverage do you provide?
A: We provide an 18-month warranty from site arrival or 12 months from commercial operation (whichever comes first).
Q: What payment terms are accepted?
A: Standard commercial terms are 30% advance deposit, 40% manufacturing milestone payment, and 30% balance prior to export shipment, payable in USD, EUR, or RMB.
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