{"id":606,"date":"2018-10-17T00:15:56","date_gmt":"2018-10-16T16:15:56","guid":{"rendered":"https:\/\/plasticmoldco.com\/?p=606"},"modified":"2018-10-17T00:15:56","modified_gmt":"2018-10-16T16:15:56","slug":"chapter-24-cooling-system-equations","status":"publish","type":"post","link":"https:\/\/www.plasticmoldco.com\/nb\/2018\/10\/17\/kapittel-24-ligninger-for-kjolesystemer\/","title":{"rendered":"Kapittel 24, Ligninger for kj\u00f8lesystemet"},"content":{"rendered":"<div id=\"titlep\">\n<div><\/div>\n<\/div>\n<h1>Nedkj\u00f8lingstid<\/h1>\n<p>Teoretisk sett er kj\u00f8lingstiden proporsjonal med kvadratet av den tyngste delens veggtykkelse eller potensen av 1,6 for den st\u00f8rste kanaldiameteren. Det vil si at<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1288 alignnone\" title=\"Avkj\u00f8lingstid\" src=\"https:\/\/web.archive.org\/web\/20130131102810im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Cooling-time.gif\" alt=\"Nedkj\u00f8lingstid\" width=\"477\" height=\"202\" \/><\/p>\n<p>hvor den termiske diffusiviteten til polymersmelten er definert som<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1289 alignnone\" title=\"Kj\u00f8letid-2\" src=\"https:\/\/web.archive.org\/web\/20130131102810im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Cooling-time-2.gif\" alt=\"Nedkj\u00f8lingstid\" width=\"453\" height=\"86\" \/><\/p>\n<p>Med andre ord firedobler en dobling av veggtykkelsen avkj\u00f8lingstiden.<\/p>\n<h1>Reynolds tall og kj\u00f8lev\u00e6skestr\u00f8mning<\/h1>\n<p>Hvorvidt kj\u00f8lev\u00e6skestr\u00f8mmen er turbulent eller ikke, kan avgj\u00f8res ved hjelp av Reynoldstallet (Re), som er oppf\u00f8rt i tabell 1. Reynoldstallet er definert som:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1290 alignnone\" title=\"Kj\u00f8letid-3\" src=\"https:\/\/web.archive.org\/web\/20130131102810im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Cooling-time-3.gif\" alt=\"Kj\u00f8letid-3\" width=\"287\" height=\"79\" \/><\/p>\n<p>hvor\u00a0<strong>\u03c1<\/strong>\u00a0er tettheten til kj\u00f8lev\u00e6sken,\u00a0<strong>U<\/strong>\u00a0er den gjennomsnittlige hastigheten til kj\u00f8lev\u00e6sken,\u00a0<strong>d<\/strong>\u00a0er diameteren p\u00e5 kj\u00f8lekanalen, og\u00a0\u00a0<strong>\u03b7<\/strong>\u00a0er den dynamiske viskositeten til kj\u00f8lev\u00e6sken.<\/p>\n<p>TABELL 1. Kj\u00f8lev\u00e6skestr\u00f8mningstyper og tilsvarende<br \/>\nReynolds tallomr\u00e5der<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1291\" title=\"Kj\u00f8letid-4\" src=\"https:\/\/web.archive.org\/web\/20130131102810im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Cooling-time-4.gif\" alt=\"Kj\u00f8letid-4\" width=\"347\" height=\"182\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>Teoretisk sett er avkj\u00f8lingstiden proporsjonal med kvadratet av den tyngste delens veggtykkelse eller potensen av 1,6 for den st\u00f8rste l\u00f8perdiameteren. Det vil si: der den termiske diffusiviteten til polymersmelte er definert som Med andre ord, en dobling av veggtykkelsen firedobler kj\u00f8lingstiden. Reynolds tall og kj\u00f8lev\u00e6skestr\u00f8m Om [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[15],"tags":[],"class_list":["post-606","post","type-post","status-publish","format-standard","hentry","category-mould-technology-blog-1"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Chapter 24, Cooling system equations - Plastic Mold | China Mold Maker<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.plasticmoldco.com\/nb\/2018\/10\/17\/capitulo-24-ecuaciones-del-sistema-de-refrigeracion\/\" \/>\n<meta property=\"og:locale\" content=\"nb_NO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chapter 24, Cooling system equations - Plastic Mold | China Mold Maker\" \/>\n<meta property=\"og:description\" content=\"Cooling time Theoretically, cooling time is proportional to the square of the heaviest part wall thickness or the power of 1.6 for the largest runner diameter. 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