{"version":"1.0","provider_name":"\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u91d1\u578b\uff5c\u4e2d\u56fd\u91d1\u578b\u30e1\u30fc\u30ab\u30fc","provider_url":"https:\/\/www.plasticmoldco.com\/ja","title":"Chapter 25-2, Residual stress, china injection mold - Plastic Mold | China Mold Maker","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"wA9O5OcPKW\"><a href=\"https:\/\/www.plasticmoldco.com\/ja\/2018\/10\/17\/\u7b2c25\u7ae0-2\u6b8b\u7559\u5fdc\u529b\u4e2d\u56fd\u5c04\u51fa\u6210\u5f62\u91d1\u578b\/\">\u7b2c25\u7ae0\u306e2\u3001\u6b8b\u7559\u5fdc\u529b\u3001\u4e2d\u56fd\u5c04\u51fa\u6210\u5f62\u91d1\u578b<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.plasticmoldco.com\/ja\/2018\/10\/17\/\u7b2c25\u7ae0-2\u6b8b\u7559\u5fdc\u529b\u4e2d\u56fd\u5c04\u51fa\u6210\u5f62\u91d1\u578b\/embed\/#?secret=wA9O5OcPKW\" width=\"600\" height=\"338\" title=\"&#8220;Chapter 25-2, Residual stress, china injection mold&#8221; &#8212; Plastic Mold | China Mold Maker\" data-secret=\"wA9O5OcPKW\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/* ]]> *\/\n<\/script>","description":"Unbalanced cooling from the mold wall to its center can cause thermal-induced residual stress. Furthermore, asymmetrical thermal-induced residual stress can occur if the cooling rate of the two surfaces is unbalanced. Such unbalanced cooling will result in an asymmetric tension-compression pattern across the part, causing a bending moment that tends to cause part warpage. This is illustrated in Figure 3 below. Consequently, parts with non-uniform thickness or poorly cooled areas are prone to unbalanced cooling, and thus to residual thermal stresses. For moderately complex parts, the thermal-induced\u00a0 residual stress distribution is further complicated by non-uniform wall thickness, mold\u00a0 cooling, and mold constraints to free contraction. FIGURE 3.\u00a0Asymmetrical thermal-induced residual stress [&hellip;]","thumbnail_url":"https:\/\/web.archive.org\/web\/20130131102852im_\/http:\/\/www.moldchina.org\/wp-content\/uploads\/2011\/10\/Unbalanced-cooling.gif"}