{"id":63,"date":"2026-11-06T19:06:37","date_gmt":"2026-11-06T11:06:37","guid":{"rendered":"https:\/\/kerkepm.com\/knowledge\/"},"modified":"2026-11-11T13:12:23","modified_gmt":"2026-11-11T05:12:23","slug":"knowledge","status":"publish","type":"page","link":"https:\/\/kerkepm.com\/es\/knowledge\/","title":{"rendered":"Selection, process and service notes from the shop floor"},"content":{"rendered":"<div class=\"k3\">\n<div class=\"wrap\"><div class=\"crumbs\"><a href=\"\/\">Home<\/a><span>\/<\/span>Knowledge<\/div><\/div><div class=\"wrap\"><div class=\"hero\">\n<p class=\"kicker\">Knowledge<\/p>\n<h1>Selection, process and service notes from the shop floor<\/h1>\n<p class=\"dek\">This extruder selection guide collects six articles that answer the questions customers actually ask on the phone: what size machine, which pelletizer, why the vent spits, how much energy a kilo costs, and what to check at 2,500 hours.<\/p>\n<\/div><\/div>\n<div class=\"wrap\"><div style=\"padding:30px 0 60px;max-width:820px\">\n<ul class=\"klist\"><li><a href=\"\/knowledge\/twin-screw-extruder-startup\/\">Twin Screw Extruder Startup: The 9-Step Sequence That Protects the Screw<\/a><p>Most screw damage happens in the first ten minutes of a shift, not in the tenth month of service. Here is the sequence we teach at commissioning, with the temperatures and checks that matter.<\/p><span>Operation \u00b7 7 min read<\/span><\/li><li><a href=\"\/knowledge\/twin-screw-extruder-troubleshooting\/\">Twin Screw Extruder Troubleshooting: Nine Symptoms, Nine Causes<\/a><p>Most faults reported as 'the machine is not working' resolve to feeding, vacuum, temperature or wear. This is the tree we use on the phone before anyone books a flight.<\/p><span>Service \u00b7 9 min read<\/span><\/li><li><a href=\"\/knowledge\/pelletizing-methods-compared\/\">Seven Pelletizing Methods Compared: Strand, Water Ring, Underwater, Hot Face<\/a><p>The pelletizer is chosen by the polymer, not by the budget. This table compares all seven methods we build on the criteria that actually decide the purchase: filler ceiling, water contact, pellet shape and fines.<\/p><span>Process \u00b7 8 min read<\/span><\/li><li><a href=\"\/knowledge\/twin-screw-extruder-size-chart\/\">Twin Screw Extruder Size Chart: 16 mm to 135 mm, 1 to 4,000 kg\/h<\/a><p>The complete model table with screw diameter, speed, motor, torque and reference output \u2014 plus how to read it without over-committing on capacity.<\/p><span>Selection \u00b7 6 min read<\/span><\/li><li><a href=\"\/knowledge\/extruder-maintenance-schedule\/\">Extruder Maintenance Schedule: 250 \/ 2,500 \/ 5,000 \/ 10,000 Hours<\/a><p>What to check at each interval, and the three measurements that tell you a wear part is finished before it fails.<\/p><span>Service \u00b7 6 min read<\/span><\/li><li><a href=\"\/knowledge\/extruder-energy-consumption\/\">Extruder Energy Consumption: kWh per kg, and Where It Goes<\/a><p>Specific energy for compounding typically lands between 0.12 and 0.35 kWh\/kg. This article shows which of the two ends you are on, and what actually moves the number.<\/p><span>Process \u00b7 5 min read<\/span><\/li><\/ul>\n<div class=\"call rule\" style=\"margin-top:34px\"><h4>In preparation<\/h4>\n<p>Formulation notes for filler masterbatch (CaCO<sub>3<\/sub> activation, coupling agent dosing), a 22-material L\/D selection table, and a comparison of twin screw versus triple screw dispersion at equal output. Ask us for a draft if you need one now.<\/p><\/div>\n<h2 class=\"sec\" id=\"faq\">FAQ<\/h2><details><summary>What is in the knowledge section?<\/summary><p>Selection guides, temperature profiles by material, troubleshooting sequences, maintenance schedules and energy benchmarks - written from the shop floor, not from a catalogue.<\/p><\/details><details><summary>Are the guides free to read?<\/summary><p>Yes, all of them. No registration gate; the figures are stated with the conditions they were measured under so you can compare them with your own data.<\/p><\/details><details><summary>Can I suggest a topic or ask a question?<\/summary><p>Yes - write to kerkepm@gmail.com; questions that come up repeatedly become guides, and the specific answer to your line arrives by email within one working day.<\/p><\/details><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is in the knowledge section?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Selection guides, temperature profiles by material, troubleshooting sequences, maintenance schedules and energy benchmarks - written from the shop floor, not from a catalogue.\"}}, {\"@type\": \"Question\", \"name\": \"Are the guides free to read?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, all of them. No registration gate; the figures are stated with the conditions they were measured under so you can compare them with your own data.\"}}, {\"@type\": \"Question\", \"name\": \"Can I suggest a topic or ask a question?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes - write to kerkepm@gmail.com; questions that come up repeatedly become guides, and the specific answer to your line arrives by email within one working day.\"}}]}<\/script>\n<div class=\"cta\"><div><b>Tell us your material \u2014 we will tell you the line<\/b><p>Send 25\u201350 kg and we run it on our lab extruder: pellets, running video and a capacity report back in 3\u20137 days.<\/p><\/div>\n<div class=\"acts\"><a href=\"\/get-a-quote\/\">Get a quote<\/a>\n<a class=\"alt\" href=\"\/get-a-quote\/#trial\">Send material for trial<\/a><\/div><\/div>\n<\/div><\/div>\n<nav class=\"wp-block-rank-math-toc-block k3-toc\" aria-label=\"On this page\"><b>On this page:<\/b><a href=\"#rm-more\">The short version<\/a><\/nav><div class=\"wrap\"><section class=\"k3-more\" id=\"rm-more\"><h2>Extruder selection guide \u2014 the short version<\/h2><figure class=\"k3-fig\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/kte-20-lab-twin-screw-extruder-01-1200.webp\" alt=\"extruder selection guide\" loading=\"lazy\" width=\"1200\" height=\"675\"><figcaption>Kerke test line, Nanjing \u2014 where the figures on this page were measured<\/figcaption><\/figure><p>Note on Extruder selection guide: every figure on this page is a reference range measured on Kerke's own test line in Nanjing, not a catalogue maximum. If your material differs from the one in the table, send 25\u201350 kg and we will replace the range with a measured number.<\/p><p class=\"k3-rel\"><b>Related on this site:<\/b> <a href=\"\/machines\/co-rotating-twin-screw-extruder\/\">Twin screw extruder range<\/a> \u00b7 <a href=\"\/applications\/\">Extrusion lines by application<\/a> \u00b7 <a href=\"\/get-a-quote\/\">free extrusion line quotation<\/a> \u00b7 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Masterbatch\" target=\"_blank\" rel=\"noopener\">Wikipedia: Masterbatch<\/a><\/p><\/section><\/div>\n<\/div>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"CollectionPage\",\"name\":\"Extruder Selection Guide\",\"description\":\"Six selection notes on machine sizing, pelletizing methods, startup, troubleshooting, maintenance intervals and energy consumption.\",\"url\":\"https:\/\/www.kerkepm.com\/knowledge\/\",\"publisher\":{\"@type\":\"Organization\",\"name\":\"Kerke Extrusion Equipment\",\"url\":\"https:\/\/www.kerkepm.com\/\",\"email\":\"kerkepm@gmail.com\",\"address\":{\"@type\":\"PostalAddress\",\"addressLocality\":\"Nanjing\",\"addressCountry\":\"CN\"}}}<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Home\/Knowledge Knowledge Selection, process and service notes from the shop floor This extruder selection guide collects six articles that answer the questions customers actually ask on the phone: what size machine, which pelletizer, why the vent spits, how much energy a kilo costs, and what to check at 2,500 hours. Twin Screw Extruder Startup: The [&#8230;]\n","protected":false},"author":0,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-blank.php","meta":{"footnotes":""},"application":[],"app_group":[],"class_list":["post-63","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/63","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/types\/page"}],"replies":[{"embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/comments?post=63"}],"version-history":[{"count":0,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/63\/revisions"}],"wp:attachment":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/media?parent=63"}],"wp:term":[{"taxonomy":"application","embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/application?post=63"},{"taxonomy":"app_group","embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/app_group?post=63"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}