{"id":15437,"date":"2026-09-20T08:49:48","date_gmt":"2026-09-20T08:49:48","guid":{"rendered":"https:\/\/www.fhopepack.com\/videos\/?p=15437"},"modified":"2026-10-10T12:19:42","modified_gmt":"2026-10-10T12:19:42","slug":"mechanical-load-and-tension-analysis-in-integrated-tilting-strapping-and-stretch-wrapping-systems-for-high-precision-slit-steel-coil","status":"publish","type":"post","link":"https:\/\/www.fhopepack.com\/videos\/mechanical-load-and-tension-analysis-in-integrated-tilting-strapping-and-stretch-wrapping-systems-for-high-precision-slit-steel-coil\/","title":{"rendered":"Slit Coil Tilting, Eye-Through Wrapping and Stacking Line: Setting Film Overlap and Wrap Count"},"content":{"rendered":"<blockquote>\n<p><strong>Executive summary<\/strong>\nThis clip shows one of our slit coil packing lines in our workshop. A blue upender turns each coil, an orbital ring wraps it eye-through with stretch film, and a yellow gantry lifts the wrapped coils off the conveyor and stacks them. How much the film overlaps on each pass decides how many ring turns a coil needs, so we set it per coil size and protection level.<\/p>\n<\/blockquote>\n<iframe loading=\"lazy\" width=\"1053\" height=\"592\" src=\"https:\/\/www.youtube.com\/embed\/b45MTJ78fiw\" title=\"Automatic Slit Steel Coil Handling and Wrapping Packaging Line\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<h2 id=\"table-of-contents\">Table of Contents<\/h2>\n<ul>\n<li><a href=\"#video\">What the clip shows<\/a><\/li>\n<li><a href=\"#sequence\">Why tilt, then wrap, then stack<\/a><\/li>\n<li><a href=\"#wraps\">Ring turns per coil<\/a><\/li>\n<li><a href=\"#setup\">What we set per line<\/a><\/li>\n<li><a href=\"#selection-checklist\">Selection checklist<\/a><\/li>\n<li><a href=\"#safety\">Safety<\/a><\/li>\n<li><a href=\"#engineering-faq\">Engineering FAQ<\/a><\/li>\n<li><a href=\"#next-step\">Next step<\/a><\/li>\n<li><a href=\"#related-reading\">Related reading<\/a><\/li>\n<li><a href=\"#sources\">Sources<\/a><\/li>\n<\/ul>\n<h2 id=\"video\">What the clip shows<\/h2>\n<table>\n<thead>\n<tr>\n<th>Step<\/th>\n<th>What you see<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Workshop<\/td>\n<td>Several of our coil lines under assembly<\/td>\n<\/tr>\n<tr>\n<td>Tilting<\/td>\n<td>A blue upender turns a coil on the line<\/td>\n<\/tr>\n<tr>\n<td>Wrapping<\/td>\n<td>An orbital ring wraps the coil eye-through on a roller conveyor<\/td>\n<\/tr>\n<tr>\n<td>Stacking<\/td>\n<td>A yellow gantry picks the wrapped coils and stacks them<\/td>\n<\/tr>\n<tr>\n<td>Outfeed<\/td>\n<td>Stacks move on along a long conveyor<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"sequence\">Why tilt, then wrap, then stack<\/h2>\n<ul>\n<li><strong>Tilt first.<\/strong> The coil is turned to the position the wrapper needs, so the ring can pass through the eye.<\/li>\n<li><strong>Wrap next.<\/strong> Film covers the coil faces, edges and bore before anyone handles it.<\/li>\n<li><strong>Stack last.<\/strong> The gantry only touches wrapped coils, so the film takes any contact.<\/li>\n<li><strong>One flow.<\/strong> Each station hands the coil to the next on conveyors, with no crane moves.<\/li>\n<\/ul>\n<h2 id=\"wraps\">Ring turns per coil<\/h2>\n<p><strong>Worked example (illustrative).<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th>Item<\/th>\n<th>Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Film width (illustrative)<\/td>\n<td>100 mm<\/td>\n<\/tr>\n<tr>\n<td>Overlap per pass (illustrative)<\/td>\n<td>50%<\/td>\n<\/tr>\n<tr>\n<td>Advance per ring turn, 100 \u00d7 0.5<\/td>\n<td>50 mm<\/td>\n<\/tr>\n<tr>\n<td>Coil outer circumference (illustrative)<\/td>\n<td>3,000 mm<\/td>\n<\/tr>\n<tr>\n<td>Ring turns for one layer, 3,000 \u00f7 50<\/td>\n<td>60 turns<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>This is a simple outer-circumference estimate; on the line we also allow for coil width and extra overlap at the bore.<\/p>\n<h2 id=\"setup\">What we set per line<\/h2>\n<table>\n<thead>\n<tr>\n<th>Setting<\/th>\n<th>Depends on<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Overlap<\/td>\n<td>Protection level and transport<\/td>\n<\/tr>\n<tr>\n<td>Film<\/td>\n<td>Stretch film width and pre-stretch<\/td>\n<\/tr>\n<tr>\n<td>Tilt<\/td>\n<td>Coil weight and target position<\/td>\n<\/tr>\n<tr>\n<td>Stacking<\/td>\n<td>Coils per stack and layer pads<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"selection-checklist\">Selection checklist<\/h2>\n<ul>\n<li style=\"margin-left:-1.25em;list-style-type:none\"><input type=\"checkbox\" disabled=\"disabled\" \/> Coil OD, ID, width and weight.<\/li>\n<li style=\"margin-left:-1.25em;list-style-type:none\"><input type=\"checkbox\" disabled=\"disabled\" \/> Coil position in and out of the line.<\/li>\n<li style=\"margin-left:-1.25em;list-style-type:none\"><input type=\"checkbox\" disabled=\"disabled\" \/> Film overlap and layers.<\/li>\n<li style=\"margin-left:-1.25em;list-style-type:none\"><input type=\"checkbox\" disabled=\"disabled\" \/> Coils per hour.<\/li>\n<li style=\"margin-left:-1.25em;list-style-type:none\"><input type=\"checkbox\" disabled=\"disabled\" \/> Stack pattern.<\/li>\n<li style=\"margin-left:-1.25em;list-style-type:none\"><input type=\"checkbox\" disabled=\"disabled\" \/> Floor space.<\/li>\n<\/ul>\n<h2 id=\"safety\">Safety<\/h2>\n<ul>\n<li>Keep clear of the upender and wrapping ring while they move.<\/li>\n<li>Stay outside the fenced gantry area.<\/li>\n<li>Lock out before clearing a film jam.<\/li>\n<li>For CE markets, the machine is designed to ISO 12100 and EN 415-10.<\/li>\n<\/ul>\n<h2 id=\"engineering-faq\">Engineering FAQ<\/h2>\n<p>Q: What does the line do?\nA: It tilts each slit coil, wraps it eye-through with film and stacks it with a gantry.<\/p>\n<p>Q: Why tilt before wrapping?\nA: The upender turns the coil 90 degrees so the ring shuttle can pass through the open bore.<\/p>\n<p>Q: How many ring turns does a coil need?\nA: Circumference divided by advance per turn; 60 turns at 50% overlap on 100 mm film in the worked example.<\/p>\n<p>Q: What overlap do you use?\nA: We set it per protection level and transport route.<\/p>\n<p>Q: Can the gantry stack different coil sizes?\nA: Yes, we set the stack pattern per coil size.<\/p>\n<p>Q: Which standards apply?\nA: For CE markets, ISO 12100 and EN 415-10.<\/p>\n<h2 id=\"next-step\">Next step<\/h2>\n<p>We match a slit coil packing line in three steps:<\/p>\n<ol>\n<li><strong>Submit your layout drawing<\/strong> with coil sizes, weights and coils per hour, to <strong>info@fhopepack.com<\/strong>.<\/li>\n<li><strong>Receive a proposal within 48 hours<\/strong> with the machine data and layout.<\/li>\n<li><strong>Book a site survey<\/strong> so we confirm the slitter exit layout.<\/li>\n<\/ol>\n<h2 id=\"related-reading\">Related reading<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.fhopepack.com\/videos\/coil-tilter-with-rotary-base\/\">Coil Tilter with 180 Degree Rotary Base<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/videos\/engineering-design-principles-for-downstream-slit-steel-coil-finishing-balancing-structural-rigidity-and-delicate-coil-protection-during-tilting-and-strapping\/\">Slit Coil Strapping, Wrapping and Stacking Line<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/videos\/eliminating-bottlenecks-why-your-steel-processing-center-needs-an-automated-coil-stacking-line\/\">Automatic Steel Coil Stacking and Palletizing Gantry<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/Automatic-Coil-Packing-Line\/slit-coil-packing.html\">Slit coil packing line<\/a><\/li>\n<\/ul>\n<h2 id=\"sources\">Sources<\/h2>\n<ul>\n<li>Machine content: FHOPE engineering team, 2026-10-10<\/li>\n<li>Clip: <a href=\"https:\/\/www.youtube.com\/watch?v=b45MTJ78fiw\">the video on YouTube<\/a><\/li>\n<li>Ring turns: our worked example, illustrative values<\/li>\n<li>Standards scope: ISO 12100:2010; <a href=\"https:\/\/www.nen.nl\/en\/nen-en-415-10-2014-en-191845\">EN 415-10:2014<\/a><\/li>\n<li>Proposal timing: approved house CTA (proposal within 48 hours)<\/li>\n<\/ul>\n<p><strong>Last reviewed:<\/strong> 2026-10-10<\/p>","protected":false},"excerpt":{"rendered":"<p>Executive summary This clip shows one of our slit coil packing lines in our workshop. A blue upender turns each coil, an orbital ring wraps it eye-through with stretch film, and a yellow gantry lifts [&hellip;]<\/p>","protected":false},"author":4,"featured_media":15262,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Slit Coil Tilting, Wrapping and Stacking Line: Film Overlap","_seopress_titles_desc":"Our slit coil line tilts each coil, wraps it eye-through and stacks it with a gantry: what the clip shows and how film overlap sets the number of 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