{"id":1296,"date":"2025-09-02T21:46:09","date_gmt":"2025-09-02T13:46:09","guid":{"rendered":"https:\/\/plastic-recycled.com\/?p=1296"},"modified":"2025-09-02T21:46:09","modified_gmt":"2025-09-02T13:46:09","slug":"materialharte-im-vergleich-zur-wahl-des-mischers-leitfaden-experten-im-recycling","status":"publish","type":"post","link":"https:\/\/plastic-recycled.com\/de\/materialharte-im-vergleich-zur-wahl-des-mischers-leitfaden-experten-im-recycling\/","title":{"rendered":"Materialh\u00e4rte im Vergleich zur Wahl des Mischers"},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Material Hardness vs. Mixer Selection: A Plastic Mixer Machine Supplier's Survival Guide\" src=\"https:\/\/nicetymachine.com\/wp-content\/uploads\/2025\/06\/Yellow-Modern-Mathematics-Lecture-Youtube-Thumbnail.jpg\" \/><\/p>\n<h2>Why Do Customers Always Complain About Caking &amp; Burning? \u2013 The Critical Role of Hardness<\/h2>\n<p>\u201cLast month, a client processed Shore A50 TPE in a vertical silo mixer \u2013 it fused into basketball-sized lumps in under 10 minutes, destroying 5 tons of material\u2026\u201d With over 20 years in this industry, we at <a href=\"https:\/\/rumtoo.com\/\">Rumtoo-Maschine<\/a> have learned one undeniable truth: <strong>matching mixer speed and type to Shore hardness isn\u2019t optional\u2014it\u2019s essential for operational success and cost efficiency.<\/strong><\/p>\n<h3>Understanding Material Hardness: The Foundation of Proper Mixer Selection<\/h3>\n<p>Material hardness, typically measured on the Shore scale, dictates how a polymer will behave during mixing. Misjudging this can lead to thermal degradation, material waste, and equipment damage.<\/p>\n<ul>\n<li><strong>Shore A Scale<\/strong>: Used for elastomers and soft plastics (0A-100A), where lower values indicate softer materials.<\/li>\n<li><strong>Shore D Scale<\/strong>: Applied to rigid plastics (0D-100D), with higher values representing harder materials.<\/li>\n<li><strong>Critical Threshold<\/strong>: Shore A80 serves as the crucial dividing line in equipment selection:\n<ul>\n<li>Materials &gt;A80: May be processed in vertical mixers with caution<\/li>\n<li>Materials \u2264A80: Require horizontal mixers for proper processing<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"shore hardness rubber\" src=\"https:\/\/nicetymachine.com\/wp-content\/uploads\/2025\/06\/shore-hardness-rubber-1024x942.jpg\" \/><\/p>\n<h2>Why Vertical Silo Mixers Become Destructive for Soft Materials<\/h2>\n<p><strong>The Physics of Material Destruction<\/strong>:<\/p>\n<p>Vertical silo mixers operate at high speeds that generate excessive friction and heat when processing softer materials:<\/p>\n<ul>\n<li>Blade tip speed \u2248 18m\/s (calculated from 350rpm rotation)<\/li>\n<li>Localized temperature &gt;120\u00b0C at contact points<\/li>\n<li>Centrifugal force &gt; 200G at wall surface<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"VERTICAL Spiral silo mixer\" src=\"https:\/\/nicetymachine.com\/wp-content\/uploads\/2022\/07\/IMG_20170310_141928-1024x768.jpg\" \/><\/p>\n<h3>Three Primary Risks for Soft Materials (\u2264A80)<\/h3>\n<table border=\"1\">\n<tr>\n<th style=\"text-align: center;\">Risk Factor<\/th>\n<th style=\"text-align: center;\">Physics Mechanism<\/th>\n<th style=\"text-align: center;\">Real-World Consequence<\/th>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Thermal Degradation<\/td>\n<td style=\"text-align: center;\">Friction heat &gt; melting point<\/td>\n<td style=\"text-align: center;\">TPU-A65 yellowed at 110\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Centrifugal Wall-Adhesion<\/td>\n<td style=\"text-align: center;\">350rpm G-force &gt; material adhesion<\/td>\n<td style=\"text-align: center;\">80% silicone A30 stuck to walls<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Molecular Fracture<\/td>\n<td style=\"text-align: center;\">Shear rate &gt; polymer chain strength<\/td>\n<td style=\"text-align: center;\">SEBS gel A10 disintegrated<\/td>\n<\/tr>\n<\/table>\n<blockquote>\n<p>Costly Lesson: An auto sealant manufacturer lost \u00a5800,000 when EPDM-A65 pre-cured in a vertical silo mixer. This demonstrates why vertical mixing machines should never be used for elastomers and soft plastics below Shore A80.<\/p>\n<\/blockquote>\n<h2>How Horizontal Mixers and Ribbon Blenders Preserve Material Integrity<\/h2>\n<p><strong>Core Design Advantages<\/strong>:<\/p>\n<p>Horizontal mixers from <a href=\"https:\/\/rumtoo.com\/\">Rumtoo-Maschine<\/a> utilize a gentle, efficient material flow process: Bottom \u2192 Ribbon lift \u2192 Top cascading \u2192 Axial dispersion \u2192 Counter-flow mixing \u2192 Repeat.<\/p>\n<p><img decoding=\"async\" alt=\"ribbon blender working principle\" src=\"https:\/\/nicetymachine.com\/wp-content\/uploads\/2022\/04\/ribbon-mixer-300x207.jpeg\" \/><\/p>\n<h3>Key Preservation Mechanisms<\/h3>\n<ol>\n<li>\n<p><strong>Gentle Processing<\/strong>:<\/p>\n<ul>\n<li>Maximum temperature rise: &lt;40\u00b0C (vs. 115\u00b0C in vertical mixers)<\/li>\n<li>Shear force reduction: 92% compared to vertical systems<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>Superior Material Flow Efficiency<\/strong>:<\/p>\n<ul>\n<li>8-10 complete turnovers\/minute<\/li>\n<li>Zero dead zones guaranteed for consistent mixing<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>Material Structure Preservation<\/strong>:<\/p>\n<ul>\n<li>Fiber retention: &gt;1.2mm in 30% GF-TPV<\/li>\n<li>Foam integrity: 99.3% pore retention in EVA-A28<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><img decoding=\"async\" alt=\"Horizontaler Mischerr\u00fchrer\" src=\"https:\/\/nicetymachine.com\/wp-content\/uploads\/2023\/01\/plastic-blending-sherman-plastics-corp-667x425-02-300x169.jpeg\" \/><\/p>\n<h2>The Hardness-Equipment Compatibility Matrix<\/h2>\n<h3>Materials to Avoid in High-Speed Vertical Silo Mixers<\/h3>\n<table border=\"1\">\n<tr>\n<th style=\"text-align: center;\">Materialtyp<\/th>\n<th style=\"text-align: center;\">Hardness Range<\/th>\n<th style=\"text-align: center;\">Risk Assessment<\/th>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Silicone Rubber<\/td>\n<td style=\"text-align: center;\">A10-A40<\/td>\n<td style=\"text-align: center;\">Permanent hardening \u2192 material scrap<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">TPE Ultra-Soft<\/td>\n<td style=\"text-align: center;\">A0-A30<\/td>\n<td style=\"text-align: center;\">Fusion into solid mass<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">EVA Foam<\/td>\n<td style=\"text-align: center;\">A25-A50<\/td>\n<td style=\"text-align: center;\">Zellkollaps \u2192 Elastizit\u00e4tsverlust<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Flexibles PVC<\/td>\n<td style=\"text-align: center;\">A50-A70<\/td>\n<td style=\"text-align: center;\">Weichmittelverdunstung \u2192 Spr\u00f6digkeit<\/td>\n<\/tr>\n<\/table>\n<h3>F\u00fcr Vertikalmischer geeignete Materialien (Mit strenger Temperaturkontrolle)<\/h3>\n<table border=\"1\">\n<tr>\n<th style=\"text-align: center;\">Materialtyp<\/th>\n<th style=\"text-align: center;\">H\u00e4rte<\/th>\n<th style=\"text-align: center;\">Maximale Chargenzeit<\/th>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">30% GF-PP<\/td>\n<td style=\"text-align: center;\">D85<\/td>\n<td style=\"text-align: center;\">8 Minuten<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Starres TPU<\/td>\n<td style=\"text-align: center;\">95A<\/td>\n<td style=\"text-align: center;\">6 Minuten<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">PC\/ABS-Legierung<\/td>\n<td style=\"text-align: center;\">R115<\/td>\n<td style=\"text-align: center;\">10 Minuten<\/td>\n<\/tr>\n<\/table>\n<p><img decoding=\"async\" alt=\"\" src=\"https:\/\/nicetymachine.com\/wp-content\/uploads\/2022\/03\/screw-mixer--300x225.jpeg\" \/><\/p>\n<h2>Wichtige Fragen zur richtigen Mischerauswahl<\/h2>\n<h3>1. Welche Maschine eignet sich f\u00fcr mein spezifisches Material?<\/h3>\n<p><strong>Entscheidungsprotokoll<\/strong>:<\/p>\n<ul>\n<li>Messen Sie die Materialh\u00e4rte pr\u00e4zise mit einem Shore-H\u00e4rtepr\u00fcfer<\/li>\n<li>Bei H\u00e4rte \u226480 Shore A: W\u00e4hlen Sie einen Bandmischer oder Horizontalmischer<\/li>\n<li>Bei H\u00e4rte \u226585 Shore A\/D: Ber\u00fccksichtigen Sie einen Vertikalsilo-Mischer mit Temperatur\u00fcberwachung<\/li>\n<li>Kritischer \u00dcbergangsbereich (A75-A85): F\u00fchren Sie vor der Entscheidung umfassende Materialtests durch<\/li>\n<\/ul>\n<h3>2. Sind Horizontalmischer nicht zu langsam f\u00fcr Produktionsbed\u00fcrfnisse?<\/h3>\n<p><strong>Vergleich der Homogenisierungszeit<\/strong>:<\/p>\n<table border=\"1\">\n<tr>\n<th style=\"text-align: center;\">Materialtyp<\/th>\n<th style=\"text-align: center;\">Zeit f\u00fcr Horizontalmischer<\/th>\n<th style=\"text-align: center;\">Ergebnis Vertikalsilo-Mischer<\/th>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">TPV-A60<\/td>\n<td style=\"text-align: center;\">8 Minuten<\/td>\n<td style=\"text-align: center;\">FEHLGESCHLAGEN (Materialdegradation)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">HIPS R110<\/td>\n<td style=\"text-align: center;\">15 Minuten<\/td>\n<td style=\"text-align: center;\">6 Minuten (akzeptabel)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">LDPE-A65<\/td>\n<td style=\"text-align: center;\">10 Minuten<\/td>\n<td style=\"text-align: center;\">4 Minuten (mit Degradation)<\/td>\n<\/tr>\n<\/table>\n<blockquote>\n<p>\u26a0\ufe0f Wichtiger Hinweis: Weiche Materialien und bestimmte Pulver k\u00f6nnen in vertikalen Silomischern nicht ordnungsgem\u00e4\u00df homogenisiert werden, ohne das Material zu besch\u00e4digen.<\/p>\n<\/blockquote>\n<h3>3. Was habe ich bereits die falsche Ausr\u00fcstung gekauft?<\/h3>\n<p><strong>Schadensbegrenzungsma\u00dfnahmen<\/strong>:<\/p>\n<table border=\"1\">\n<tr>\n<th style=\"text-align: center;\">L\u00f6sung<\/th>\n<th style=\"text-align: center;\">Kostensch\u00e4tzung<\/th>\n<th style=\"text-align: center;\">Wirksamkeit<\/th>\n<th style=\"text-align: center;\">Nachteile<\/th>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Fl\u00fcssigstickstoffk\u00fchlung<\/td>\n<td style=\"text-align: center;\">$20,000+<\/td>\n<td style=\"text-align: center;\">Mittel<\/td>\n<td style=\"text-align: center;\">30% Kapazit\u00e4tsreduzierung<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Batchgr\u00f6\u00dfenbegrenzung (30%)<\/td>\n<td style=\"text-align: center;\">$0<\/td>\n<td style=\"text-align: center;\">Niedrig<\/td>\n<td style=\"text-align: center;\">50% Durchsatzverlust<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Umr\u00fcstung auf horizontales System<\/td>\n<td style=\"text-align: center;\">$50,000-$150,000<\/td>\n<td style=\"text-align: center;\">Hoch<\/td>\n<td style=\"text-align: center;\">Typischerweise 14-monatige Amortisation<\/td>\n<\/tr>\n<\/table>\n<h2>H\u00e4ufig gestellte Fragen<\/h2>\n<p><strong>F: Wie oft sollte ich die Materialh\u00e4rte f\u00fcr Mischprozesse testen?<\/strong><br \/>\nA: Testen Sie die H\u00e4rte bei jeder neuen Materialcharge und bei jedem Lieferantenwechsel. Materialeigenschaften k\u00f6nnen sich zwischen Chargen erheblich unterscheiden und die Mischleistung beeinflussen.<\/p>\n<p><strong>F: Kann ich einen vertikalen Mischer anpassen, um weichere Materialien zu verarbeiten?<\/strong><br \/>\nA: Obwohl begrenzte Modifikationen wie reduzierte Blattgeschwindigkeit oder K\u00fchljacken helfen k\u00f6nnen, bieten sie selten vollst\u00e4ndige L\u00f6sungen. Das grundlegende Design vertikaler Mischer schafft inh\u00e4rente Herausforderungen f\u00fcr weiche Materialien.<\/p>\n<p><strong>F: Was ist die typische Amortisationsdauer bei der Aufr\u00fcstung auf den richtigen Mischertyp?<\/strong><br \/>\nA: Die meisten Betriebe erreichen eine Amortisation innerhalb von 12-18 Monaten durch reduzierten Materialabfall, geringeren Energieverbrauch und verringerte Stillstandszeiten. <a href=\"https:\/\/rumtoo.com\/\">Rumtoo-Maschine<\/a> hat dokumentierte F\u00e4lle, in denen Unternehmen die Kosten in unter einem Jahr wiedererlangt haben.<\/p>\n<p><strong>F: Wie beeinflusst die Umgebungstemperatur die Mischerauswahl?<\/strong><br \/>\nA: H\u00f6here Umgebungstemperaturen verst\u00e4rken die W\u00e4rmeentwicklung in vertikalen Mischern. In warmen Klimazonen oder nicht klimatisierten Anlagen kann die Schwelle zum Wechsel zu horizontalen Mischern bis zu Shore A85 betragen.<\/p>\n<p><strong>F: Gibt es hybride Systeme, die sowohl weiche als auch harte Materialien effektiv verarbeiten k\u00f6nnen?<\/strong><br \/>\nA: Einige fortschrittliche Systeme von <a href=\"https:\/\/rumtoo.com\/\">Rumtoo-Maschine<\/a> bieten variable Geschwindigkeitsregelungen und K\u00fchlm\u00f6glichkeiten, die eine breitere Materialkompatibilit\u00e4t gew\u00e4hrleisten, aber spezialisierte Ausr\u00fcstung liefert in der Regel \u00fcberlegene Ergebnisse f\u00fcr bestimmte Materialbereiche.<\/p>\n<h2>Fazit: Durch Erfahrung gelernte Lektionen<\/h2>\n<p>\u201cNachdem wir erlebt haben, wie Shore A35-Silikon in einem vertikalen Mischer verkohlt, wir bei\" <a href=\"https:\/\/rumtoo.com\/\">Rumtoo-Maschine<\/a> reached a fundamental understanding:<\/p>\n<p>MATERIAL HARDNESS = EQUIPMENT SELECTION LAW<br \/>\nMIXER RPM = MATERIAL PRESERVATION OR DESTRUCTION<\/p>\n<p>This knowledge now drives our protocol: we require hardness reports before shipping any mixer \u2013 not as bureaucracy, but as ethical responsibility to our clients\u2019 success and bottom line.\u201d<\/p>\n<p>The relationship between material hardness and mixer selection represents one of the most critical decisions in plastics processing. By understanding the Shore scale, recognizing the limitations of different mixer types, and implementing proper selection protocols, manufacturers can avoid costly mistakes, improve product quality, and enhance operational efficiency.<\/p>","protected":false},"excerpt":{"rendered":"<p>Why Do Customers Always Complain About Caking &amp; Burning? \u2013 The Critical Role of Hardness &#8220;Last month, a client processed Shore A50 TPE in a vertical silo mixer \u2013 it fused into basketball-sized lumps in under 10 minutes, destroying 5 tons of material\u2026&#8221; With over 20 years in this industry, we at Rumtoo Machine have [&#8230;]\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1296","post","type-post","status-publish","format-standard","hentry","category-plastic-recycling"],"_links":{"self":[{"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/posts\/1296","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/comments?post=1296"}],"version-history":[{"count":0,"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/posts\/1296\/revisions"}],"wp:attachment":[{"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/media?parent=1296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/categories?post=1296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/plastic-recycled.com\/de\/wp-json\/wp\/v2\/tags?post=1296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}