{"id":223,"date":"2022-07-14T23:08:13","date_gmt":"2022-07-14T15:08:13","guid":{"rendered":"https:\/\/acomold.com\/prevent-overheating-of-the-mold-valve-pin.html"},"modified":"2023-07-26T17:53:25","modified_gmt":"2023-07-26T09:53:25","slug":"prevent-overheating-of-the-mold-valve-pin","status":"publish","type":"post","link":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html","title":{"rendered":"Prevent overheating of the mold valve pin"},"content":{"rendered":"<p>We had a clear nylon vessel that exhibited a &#8220;splay like&#8221; condition that emanated from the gate region. In our case, the mold had valve gates and what was happening is that some of the melt was being left on the face a sides of the valve pin. The next shot these now solidified pieces of nylon would break loose as the incoming melt stream re-melted the prior shot but because of the viscosity differences would result in a splay like appearance to the naked eye. Only under 30X microscopic exam could you actually see the residual debris and the flaring trails behind them like comets.<\/p>\n<p>Our solution was to reconfigure the hot tip drop seating to prevent the overheating of the valve pin.<\/p>\n<p>I suggest that this can happen anywhere in the melt stream where the melt flow can tear off crystalized resin that is just below the glass transition temperature, such as dead spots in the sprue or cold runner due to rough machining or dead spots in the internal runner channels of a hot runner system.<\/p>\n<p>Probably the last thing you will look at\/for. In our case it was 30+ days of solid <a href=\"https:\/\/www.acomold.com\/plastic-injection-molding-troubleshooting-guide.html\">troubleshooting<\/a> before we hit upon this as the cause of our problem.<\/p>\n<p>Also, I may have missed it, but if the injection can be profiled to vary the speed (reduce it) just before cavity full i.e. 99% full this can sometimes eliminate some shear related splay type problems. It is quick to do on machines so equipped and if it works, everyone smiles.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We had a clear nylon vessel that exhibited a &#8220;splay like&#8221; condition that emanated from the gate region. In our case, the mold had valve gates and what was happening is that some of the melt was being left on the face a sides of the valve pin. The next shot these now solidified pieces [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7638,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[35,36],"class_list":["post-223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tips","tag-how-to","tag-injection-molding-101"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v24.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Prevent overheating of the mold valve pin - ACO Mold<\/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.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Prevent overheating of the mold valve pin\" \/>\n<meta property=\"og:description\" content=\"We had a clear nylon vessel that exhibited a &#8220;splay like&#8221; condition that emanated from the gate region. In our case, the mold had valve gates and what was happening is that some of the melt was being left on the face a sides of the valve pin. The next shot these now solidified pieces [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html\" \/>\n<meta property=\"og:site_name\" content=\"ACO Mold\" \/>\n<meta property=\"article:published_time\" content=\"2022-07-14T15:08:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-07-26T09:53:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.acomold.com\/wp-content\/uploads\/2022\/08\/blog-aco-mold.png\" \/>\n\t<meta property=\"og:image:width\" content=\"720\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"mmldigi\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"mmldigi\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html\",\"url\":\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html\",\"name\":\"Prevent overheating of the mold valve pin - ACO Mold\",\"isPartOf\":{\"@id\":\"https:\/\/www.acomold.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.acomold.com\/wp-content\/uploads\/2022\/08\/blog-aco-mold.png\",\"datePublished\":\"2022-07-14T15:08:13+00:00\",\"dateModified\":\"2023-07-26T09:53:25+00:00\",\"author\":{\"@id\":\"https:\/\/www.acomold.com\/#\/schema\/person\/3fc4cbf4416710d8c586f0453dbc4ae9\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#primaryimage\",\"url\":\"https:\/\/www.acomold.com\/wp-content\/uploads\/2022\/08\/blog-aco-mold.png\",\"contentUrl\":\"https:\/\/www.acomold.com\/wp-content\/uploads\/2022\/08\/blog-aco-mold.png\",\"width\":720,\"height\":500,\"caption\":\"blog aco mold\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.acomold.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Prevent overheating of the mold valve pin\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.acomold.com\/#website\",\"url\":\"https:\/\/www.acomold.com\/\",\"name\":\"ACO Mold\",\"description\":\"A One-Stop Manufacturer for Plastic Injection Mold and Molding Services\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.acomold.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.acomold.com\/#\/schema\/person\/3fc4cbf4416710d8c586f0453dbc4ae9\",\"name\":\"mmldigi\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.acomold.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/e94c9c722541d5c2192c891bdf0bf42b73ad86e531a8667aa4fe9071e530d7a2?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/e94c9c722541d5c2192c891bdf0bf42b73ad86e531a8667aa4fe9071e530d7a2?s=96&d=mm&r=g\",\"caption\":\"mmldigi\"},\"url\":\"https:\/\/www.acomold.com\/author\/mmldigi\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Prevent overheating of the mold valve pin - ACO Mold","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html","og_locale":"en_US","og_type":"article","og_title":"Prevent overheating of the mold valve pin","og_description":"We had a clear nylon vessel that exhibited a &#8220;splay like&#8221; condition that emanated from the gate region. In our case, the mold had valve gates and what was happening is that some of the melt was being left on the face a sides of the valve pin. The next shot these now solidified pieces [&hellip;]","og_url":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html","og_site_name":"ACO Mold","article_published_time":"2022-07-14T15:08:13+00:00","article_modified_time":"2023-07-26T09:53:25+00:00","og_image":[{"width":720,"height":500,"url":"https:\/\/www.acomold.com\/wp-content\/uploads\/2022\/08\/blog-aco-mold.png","type":"image\/png"}],"author":"mmldigi","twitter_card":"summary_large_image","twitter_misc":{"Written by":"mmldigi","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html","url":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html","name":"Prevent overheating of the mold valve pin - ACO Mold","isPartOf":{"@id":"https:\/\/www.acomold.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#primaryimage"},"image":{"@id":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#primaryimage"},"thumbnailUrl":"https:\/\/www.acomold.com\/wp-content\/uploads\/2022\/08\/blog-aco-mold.png","datePublished":"2022-07-14T15:08:13+00:00","dateModified":"2023-07-26T09:53:25+00:00","author":{"@id":"https:\/\/www.acomold.com\/#\/schema\/person\/3fc4cbf4416710d8c586f0453dbc4ae9"},"breadcrumb":{"@id":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#primaryimage","url":"https:\/\/www.acomold.com\/wp-content\/uploads\/2022\/08\/blog-aco-mold.png","contentUrl":"https:\/\/www.acomold.com\/wp-content\/uploads\/2022\/08\/blog-aco-mold.png","width":720,"height":500,"caption":"blog aco mold"},{"@type":"BreadcrumbList","@id":"https:\/\/www.acomold.com\/prevent-overheating-of-the-mold-valve-pin.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.acomold.com\/"},{"@type":"ListItem","position":2,"name":"Prevent overheating of the mold valve pin"}]},{"@type":"WebSite","@id":"https:\/\/www.acomold.com\/#website","url":"https:\/\/www.acomold.com\/","name":"ACO Mold","description":"A One-Stop Manufacturer for Plastic Injection Mold and Molding Services","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.acomold.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.acomold.com\/#\/schema\/person\/3fc4cbf4416710d8c586f0453dbc4ae9","name":"mmldigi","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.acomold.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/e94c9c722541d5c2192c891bdf0bf42b73ad86e531a8667aa4fe9071e530d7a2?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/e94c9c722541d5c2192c891bdf0bf42b73ad86e531a8667aa4fe9071e530d7a2?s=96&d=mm&r=g","caption":"mmldigi"},"url":"https:\/\/www.acomold.com\/author\/mmldigi"}]}},"_links":{"self":[{"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/posts\/223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/comments?post=223"}],"version-history":[{"count":1,"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/posts\/223\/revisions"}],"predecessor-version":[{"id":7725,"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/posts\/223\/revisions\/7725"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/media\/7638"}],"wp:attachment":[{"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/media?parent=223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/categories?post=223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.acomold.com\/wp-json\/wp\/v2\/tags?post=223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}