{"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\/nl\/2018\/10\/17\/hoofdstuk-24-vergelijkingen-voor-koelsystemen\/","title":{"rendered":"Hoofdstuk 24, Vergelijkingen voor koelsystemen"},"content":{"rendered":"<div id=\"titlep\">\n<div><\/div>\n<\/div>\n<h1>Koeltijd<\/h1>\n<p>Theoretisch is de koeltijd evenredig met het kwadraat van de wanddikte van het zwaarste onderdeel of de macht 1,6 voor de grootste diameter van de loopwagen. Dat wil zeggen:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1288 alignnone\" title=\"Koeltijd\" src=\"https:\/\/web.archive.org\/web\/20130131102810im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Cooling-time.gif\" alt=\"Koeltijd\" width=\"477\" height=\"202\" \/><\/p>\n<p>waarbij de thermische diffusie van polymeermelt wordt gedefinieerd als<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1289 alignnone\" title=\"Koeltijd-2\" src=\"https:\/\/web.archive.org\/web\/20130131102810im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Cooling-time-2.gif\" alt=\"Koeltijd\" width=\"453\" height=\"86\" \/><\/p>\n<p>Met andere woorden, een verdubbeling van de wanddikte verviervoudigt de koeltijd.<\/p>\n<h1>Reynoldsgetal en koelmiddelstroming<\/h1>\n<p>Of de koelmiddelstroom al dan niet turbulent is, kan worden bepaald aan de hand van het Reynoldsgetal (Re), zoals weergegeven in tabel 1. Het Reynoldsgetal wordt gedefinieerd als:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1290 alignnone\" title=\"Koeltijd-3\" src=\"https:\/\/web.archive.org\/web\/20130131102810im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Cooling-time-3.gif\" alt=\"Koeltijd-3\" width=\"287\" height=\"79\" \/><\/p>\n<p>waarbij\u00a0<strong>\u03c1<\/strong>\u00a0de dichtheid van de koelvloeistof,\u00a0<strong>U<\/strong>\u00a0de gemiddelde snelheid van de koelvloeistof,\u00a0<strong>d<\/strong>\u00a0de diameter van het koelkanaal en\u00a0\u00a0<strong>\u03b7<\/strong>\u00a0de dynamische viscositeit van de koelvloeistof.<\/p>\n<p>TABEL 1. Typen koelmiddelstromen en bijbehorende<br \/>\nReynoldsgetal bereiken<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1291\" title=\"Koeltijd-4\" src=\"https:\/\/web.archive.org\/web\/20130131102810im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Cooling-time-4.gif\" alt=\"Koeltijd-4\" width=\"347\" height=\"182\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>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. That is: where the thermal diffusivity of polymer melt is defined as In other words, doubling the wall thickness quadruples the cooling time. Reynolds number and coolant flow Whether [&hellip;]<\/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\/nl\/2018\/10\/17\/capitulo-24-ecuaciones-del-sistema-de-refrigeracion\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\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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