{"id":9037,"date":"2025-02-08T09:09:29","date_gmt":"2025-02-08T09:09:29","guid":{"rendered":"https:\/\/www.fhopepack.com\/videos\/?p=9037"},"modified":"2026-10-29T06:35:22","modified_gmt":"2026-10-29T06:35:22","slug":"automated-slit-coil-packing-line-for-service-center-boost-your-productivity","status":"publish","type":"post","link":"https:\/\/www.fhopepack.com\/videos\/automated-slit-coil-packing-line-for-service-center-boost-your-productivity\/","title":{"rendered":"Slit Coil Packing Line for Service Centers: Strapping and Wrapping"},"content":{"rendered":"<blockquote>\n<p><strong>Executive summary<\/strong>\nA slit coil packing line for service centers integrates down-ending, centring, strapping, eye-through wrapping, weighing, and stacking into a single automated flow. This configuration allows a slitting service center to process narrow coils directly from the slitter turnstile without manual handling. The system is designed to handle coils up to 4,000 kg and 500 mm wide on narrow-strip lines, or larger dimensions on heavy-duty configurations.<\/p>\n<\/blockquote>\n<iframe loading=\"lazy\" width=\"940\" height=\"535\" src=\"https:\/\/www.youtube.com\/embed\/bhIOkdPatUw?rel=0\" title=\"Slit Coil Packing Line for Service Centers: Strapping, Eye-Through Wrapping and Stacking\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<hr \/>\n<h2>Overview<\/h2>\n<p>This guide explains how a slit coil packing line integrates downstream processing for slitting service centers, from the station sequence and capacity matching to the specifications used to size the equipment.<\/p>\n<h2>What stations are included in the line?<\/h2>\n<p>The line runs each coil from the slitter output to the final pallet stack through six stations:<\/p>\n<ol>\n<li><strong>Down-ender<\/strong>: Tilts coils from the &#8220;eye-to-wall&#8221; orientation of the slitter turnstile to an &#8220;eye-to-sky&#8221; position, which is critical for stable downstream conveyance and stacking. The hydraulic unit runs an independent 60-second down-ending cycle and handles slit widths of 20\u2013350 mm on a pick-up horn with about 1,800 mm of stroke [manufacturer rating].<\/li>\n<li><strong>Centring station<\/strong>: Aligns the coil with the conveyor center line using sensors and a lifting table. Proper centring ensures that strapping is applied evenly and that the coil stacks straight on the pallet.<\/li>\n<li><strong>Strapping unit<\/strong>: Applies PET or steel straps radially through the coil eye at three, four, or six indexing points.<\/li>\n<li><strong>Orbital wrapper<\/strong>: Passes paper or stretch film through the coil eye for full coverage while support rollers rotate the coil.<\/li>\n<li><strong>Inline weighing and labelling<\/strong>: Records net and gross weight and applies a barcode label for tracking.<\/li>\n<li><strong>Stacking station<\/strong>: A stacking arm or gantry stacker places coils eye-to-sky onto wooden pallets, with timber separators between layers to prevent shifting in transit.<\/li>\n<\/ol>\n<h2>How does the line capacity match the slitter?<\/h2>\n<p>The packing line must clear all narrow coils from one mother coil before the next mother coil arrives at the slitter. Cycle time is set by the number of strips per mother coil and the strapping time per coil; strapping is typically the slowest station and paces the whole line.<\/p>\n<p>For narrow-strip setups, the line is designed to pack 25\u201340 coils per hour. At 40 coils per hour, the line has 90 seconds per coil. If a slitter produces 20 strips per mother coil, the total packing time is 20 multiplied by 90 seconds, equaling 30 minutes. If the slitter&#8217;s cycle time is shorter than this, coils will queue on the turnstile. In such cases, the configuration may require a buffer conveyor, a second strapping head, or a faster stacker to maintain throughput.<\/p>\n<h2>What are the specifications for narrow and wide coils?<\/h2>\n<p>The specifications follow the coil width and weight, and the table below sets the two configurations side by side. Narrow slit coil lines take coils up to 500 mm wide and 4,000 kg, with an outer diameter (OD) up to 1,500 mm, or 2,100 mm on request, and an inner diameter (ID) of 508 mm or 610 mm. A wide-coil line runs 450\u20131,900 mm width at a slower rate to suit the heavier mass and larger dimensions. The stacking accuracy on a gantry stacker is confirmed per project.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left\">Parameter<\/th>\n<th style=\"text-align: left\">Narrow slit coil line<\/th>\n<th style=\"text-align: left\">Wide coil line<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left\">Packing capacity<\/td>\n<td style=\"text-align: left\">25\u201340 coils per hour<\/td>\n<td style=\"text-align: left\">5\u20138 coils per hour<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Coil width<\/td>\n<td style=\"text-align: left\">Up to 500 mm<\/td>\n<td style=\"text-align: left\">450\u20131,900 mm<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Coil weight<\/td>\n<td style=\"text-align: left\">Up to 4,000 kg<\/td>\n<td style=\"text-align: left\">Confirmed per project<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Coil OD<\/td>\n<td style=\"text-align: left\">Up to 1,500 mm, or 2,100 mm on request<\/td>\n<td style=\"text-align: left\">Confirmed per project<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Coil ID<\/td>\n<td style=\"text-align: left\">508 mm or 610 mm<\/td>\n<td style=\"text-align: left\">Confirmed per project<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Strapping<\/td>\n<td style=\"text-align: left\">PET or steel, 2,000\u201322,000 N tension<\/td>\n<td style=\"text-align: left\">Confirmed per project<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Wrapping overlap<\/td>\n<td style=\"text-align: left\">10\u201390%<\/td>\n<td style=\"text-align: left\">Confirmed per project<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>How is strapping time calculated?<\/h2>\n<p>Strapping time is the primary constraint on line speed. Each strap application takes between 15 and 35 seconds on automatic PET or steel heads. The total time depends on the number of straps required per coil.<\/p>\n<p>For example, four straps at 15 seconds each take 60 seconds, which fits within the 90-second budget for a 40-coils-per-hour line. However, four straps at 35 seconds each take 140 seconds, which limits the line speed to approximately 25 coils per hour. Heavy coils requiring six straps take even longer and run at the lower end of the capacity range. Turntable indexing and conveyor transfer add time on top of the strap cycles, measured per layout. A related turntable-stacker configuration straps at a 15-second cycle with automatic 3\/4\/6-strap sequences [manufacturer rating].<\/p>\n<h2>What wrapping materials are used?<\/h2>\n<p>The orbital wrapper passes material through the coil eye while the coil rotates. The overlap between layers is set between 10% and 90% via the PLC. The choice of material depends on the shipment requirements and storage conditions.<\/p>\n<p>Stretch film is used for protection against dust and moisture during storage. VCI (Volatile Corrosion Inhibitor) paper is selected for steel coils that require rust protection during sea freight. Woven fabric provides a tougher outer layer for additional protection. Composite wraps, such as VCI paper under stretch film, combine both functions to suit different customer needs [manufacturer rating].<\/p>\n<h2>How does the stacking process work?<\/h2>\n<p>The stacker picks packed coils using an electromagnet or vacuum system and places them eye-to-sky on wooden pallets; coils per pallet and stack height follow the coil&#8217;s OD, width, and weight. Maximum stacking capacity reaches 6,000 kg per pallet at 1,000 mm stack height including the pallet [manufacturer rating]. Timber separators between layers keep tall stacks stable and prevent shifting in transit.<\/p>\n<p>Finished pallets are transported via powered roller conveyors to the shipping zone. In fully automated lines, the finished pallet may also be wrapped, weighed, and labelled separately from the individual coil labels, ensuring complete traceability and protection.<\/p>\n<h2>What automation levels are available?<\/h2>\n<p>Three automation levels suit different service center needs; the table lists what each adds. The basic level replaces manual crane-and-hook handling with controlled machines; the fully automated level also sorts coils by width, OD, and stacking logic in the program.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left\">Automation Level<\/th>\n<th style=\"text-align: left\">Main Equipment<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left\">Basic Compact Line<\/td>\n<td style=\"text-align: left\">Coiler trolley, 90\u00b0 tilting down-ender, turntable for semi-auto strapping, jog crane or magnetic stacker<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Standard Automated Line<\/td>\n<td style=\"text-align: left\">Turnstile pick-up and lifter, inline weighing, automatic or semi-automatic bundling, trolley lifter<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Fully Automated Line<\/td>\n<td style=\"text-align: left\">Coil car and down-ender, automatic strapping, eye-through wrapping, gantry stacking, pallet wrapping, weighing and labelling<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>What are the control and utility requirements?<\/h2>\n<p>The line is controlled by a Siemens S7-1200 or S7-1500F PLC with an HMI. The S7-1500F is a fail-safe PLC used for safety functions on fully automated lines. The system operates on 380\u2013480 V, 50\/60 Hz, 3-phase power. Pneumatic units require an air supply of 5\u20138 bar. These utilities must be planned at the site level before installation.<\/p>\n<h2>How is safety ensured?<\/h2>\n<p>Safety is a critical design aspect. Moving coils, the stacker, and strapping heads present main hazards. Automatic zones are fenced, and light curtains and safety interlocks are fitted at the stacking and strapping stations. They stop the stacker and heads when an operator enters the zone.<\/p>\n<p>For CE markets, ISO 12100 sets the risk-assessment method, and EN 415-10 sets general requirements for packaging machines. These standards are used as design references. Certification of a delivered machine is confirmed in the project ordering agreement; we do not claim a certificate independently.<\/p>\n<h2>What data is needed for a real configuration?<\/h2>\n<p>To size the line accurately, provide the following data; it allows precise calculation of cycle times and equipment selection.<\/p>\n<ul>\n<li>Coil width, OD, ID, and weight range for both narrow and wide coils.<\/li>\n<li>Number of strips per mother coil and the slitter cycle time.<\/li>\n<li>Number of straps per coil and the strap type (PET or steel).<\/li>\n<li>Wrapping material preference: film, VCI paper, or woven fabric.<\/li>\n<li>Pallet size, stack height, and separator use requirements.<\/li>\n<li>Weighing, labelling, and ERP connection needs.<\/li>\n<\/ul>\n<p>Send this data to receive a line proposal with the station list, strapping time check, and layout \u2014 delivered within 48 hours after we confirm the details.<\/p>\n<h2>Related reading<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.fhopepack.com\/Automatic-Coil-Packing-Line\/\">Automatic coil packing line overview<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/Show-Room\/steel\/slitting-coil-packaging-line.html\">Slitting coil packaging line<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/Automatic-Packing-Line\/\">Automatic packing line systems<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/Coil_packing_machine.html\">Coil packing machine details<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/Automatic-Coil-Packing-Line\/slit-coil-packing.html\">Slit coil handling and packaging line<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/Automatic-Coil-Packing-Line\/automatic-slit-coil-packaging-system.html\">Automatic slit coil packaging system<\/a><\/li>\n<\/ul>\n<h2>Sources<\/h2>\n<ul>\n<li>FHOPE product pages: slit coil handling and packaging line; automatic slit coil packaging system; automatic slitting coil packaging line with turntable stacker<\/li>\n<li>ISO 12100 (risk assessment); EN 415-10 (packaging machines)<\/li>\n<\/ul>\n<p><strong>Last reviewed:<\/strong> 2026-10-29<\/p>","protected":false},"excerpt":{"rendered":"<p>Executive summary A slit coil packing line for service centers integrates down-ending, centring, strapping, eye-through wrapping, weighing, and stacking into a single automated flow. This configuration allows a slitting service center to process narrow coils [&hellip;]<\/p>","protected":false},"author":5,"featured_media":9040,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Slit Coil Packing Line for Service Centers: Specs","_seopress_titles_desc":"How we size a slit coil packing line to the slitter: strapping time per coil, eye-through wrapping, stacking to pallets, 25\u201340 coils\/h, Siemens PLC 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