ÿþ<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>Common problems in injection mold trials--Higrade Moulds|china mould/mold company|chinese mould/mold supplier|china plastic mould/mold|chinese plastic injection mould/mold|china stamping die|stamping part|punching die</title> <meta name="description" content="Qingdao Higrade Moulds & Products Co., Ltd specializes in manufacture and design of injection mold and sheetmetal mold, as well as production of plastic parts and sheet metal parts"> <meta name="keywords" content="Higrade, Higrade Mold, china mould/mold company,chinese mould/mold supplier,china plastic mould/mold,chinese plastic injection mould/mold,china stamping die,stamping part,punching die,Injection Mold, Sheet Metal Mold, Plastic Parts, Sheet Metal Parts,"> <link href="../../css.css" rel="stylesheet" type="text/css"> <script> function autoResize() { try { document.all["test"].style.height=test.document.body.scrollHeight } catch(e){} } </script> </head> <body leftmargin="0" topmargin="0" marginwidth="0" marginheight="0" rightmargin="0" bottommargin="0" style="background-image:none;"> <!-- ImageReady Slices (*gh˜˜-1.psd) --> <table width="1003" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="../../images/top.jpg" width="1003" height="84" border="0" usemap="#Map"></td> </tr> <map name="Map"><area shape="rect" coords="801,40,861,68" href="../../cn/index.asp"> <area shape="rect" coords="874,37,953,69" href="../../en/index.asp"> </map> </table> </td> </tr> <tr> <td> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="1003" height="184"> <param name="movie" value="../../images/01.swf"> <param name="quality" value="high"> <embed src="../../images/01.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="1003" height="184"></embed> </object></td> </tr> </table> </td> </tr> <tr> <td height=4 bgcolor="#FFFFFF"></td> </tr> <tr> <td height="38" background="../../images/menu_bg.jpg"> <div align="center" class="STYLE3_5"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="85%"><div align="center" class="STYLE10"><strong><a href="http://www.higrademould.com" class="a1">Home</a>&nbsp; /&nbsp; <a href="../../en/gsgk.asp" class="a1">About Company</a>&nbsp; /&nbsp; <a href="../../en/cpzs.asp" class="a1">Products</a>&nbsp; /&nbsp; <a href="../../en/yzsfw.asp" class="a1">Full Service</a>&nbsp; /&nbsp; <a href="../../en/zlbz.asp" class="a1">Quality Assurance</a>&nbsp; /&nbsp; <a href="../../en/jzl.asp" class="a1">Competitive Lead Time</a>&nbsp; /&nbsp; <a href="../../en/lyb.asp" class="a1">Messages</a>&nbsp; /&nbsp; <a href="../../en/lxwm.asp" class="a1">Contact Us</a></strong></div></td> <td width="15%"><div align="center" class="STYLE7"> <SCRIPT language=JavaScript><!-- Begin var enable=0; today=new Date(); var date; var time_start = new Date(); var clock_start = time_start.getTime(); date=(today.getYear())+"t^"+(today.getMonth()+1)+"g"+today.getDate()+"åe "; document.write("<span style='font-size: 9pt;color:#ffffff;'>"+date); // --></SCRIPT> </div></td> </tr> </table> </div> </td> </tr> <tr> <td height="200" bgcolor="#FFFFFF"><table width="100%" border="0" cellspacing="0" cellpadding="5"> <tr> <td width="240" valign="top"> <iframe id=test style="height:expression(1); aho:expression(autoResize())" src="../../en/left1.asp" scrolling="no" frameborder="0" width="248"></iframe> </td> <td valign="top"><table width="100%" border="0" cellspacing="1" cellpadding="3"> <tr> <td><table width="96%" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td height="40" valign="bottom" class="STYLE6_2"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="5%"><img src="../../images/qyjj_1-8.jpg" width="28" height="22"></td> <td width="95%" valign="bottom"><strong class="STYLE3_5">Company News</strong></td> </tr> </table> </td> </tr> <tr> <td height="10" valign="top" class="STYLE6_2"><hr style="margin:0; padding:0"></td> </tr> <tr> <td width="64%" class="STYLE6_2" height="6"></td> </tr> </table> <table width="100%" border="0" align="center" cellpadding="0" cellspacing="0" class="STYLE3_5"> <tr> <td height="35"><div align="center"><strong>Common problems in injection mold trials</strong></div></td> </tr> <tr> <td><div align="center"> <table width="90%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><DIV>Injection mold have many problems in application. Here are the common ones in trials:</DIV> <DIV>&nbsp;</DIV> <DIV>1. Color unevenness: As the bad distribution of pigment or filler, plastic or paint color in the plastic surface of the color evenly. With the phenomenon of uneven color show different reasons for this are different, mainly near the inlet uneven distribution of pigment, such as uneven color, compared with the plastic parts thermal stability due to poor weld parts and paint color is uneven nature of the time related. </DIV> <DIV>&nbsp;</DIV> <DIV>2. Size instability: mainly due to mold strength bad, bad precision, injection molding machine working conditions of uncertainty and instability and other reasons, so that changes in size plastic instability. </DIV> <DIV>&nbsp;</DIV> <DIV>3. Bubbles: As the financial material adverse internal gas emissions caused by too much or plastic parts and the residual gas, and showed smaller or a series of holes (note the difference should be a vacuum bubble.</DIV> <DIV>&nbsp;</DIV> <DIV>4. warping and distortion: Since forming residual stress, shear stress, uneven cooling and contraction stress, caused by internal stress; stripping bad, inadequate cooling, inadequate strength of plastic parts, mold deformation and other reasons, to place plastic parts shape distortion, warp in the partial or type hole, the phenomena of uneven thickness. </DIV> <DIV>&nbsp;</DIV> <DIV>5. crack: As the plastic parts inside the stress is too large, poor ejection, cooling uneven, poor performance or plastic poorly designed plastic parts, and other ills (eg, deformation) and other reasons, to make plastic surface and near the inlet produces fine cracks or cracking or solvent in the load and the role of such phenomena as cracking does not occur. </DIV> <DIV>&nbsp;</DIV> <DIV>6..black spots and black bar: As the flammability of plastic decomposition or volatile compound, air, decomposition at high temperature burning, incendiary material into the plastic cavity with the melt, the plastic surface showed black spots, black stripes, or along the plastic surface of carbon burn-like phenomena. </DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV> <DIV> <TABLE class="" width="100%" border=0> <TBODY> <TR bgColor=#d9d2c3> <TD bgColor=#f0f0f0 height=30> <DIV align=center><STRONG>news title</STRONG></DIV></TD> <TD bgColor=#f0f0f0 height=30> <DIV align=center><STRONG>creatime </STRONG></DIV></TD></TR></TBODY></TABLE></DIV> <DIV> <TABLE class="" width="100%" border=0> <TBODY> <TR> <TD bgColor=#f9f9f9 height=30> <DIV align=center><A onmouseover="javascript:this.style.cssText='CURSOR: hand;'" style="CURSOR: hand" href="http://www.higrademould.com/admin/news/newsen170.htm" target=_blank>What are the advantages of mould with hot runner?</A></DIV></TD> <TD width="33%" bgColor=#f9f9f9 height=30> <DIV align=center>2010-7-19</DIV></TD></TR> <TR> <TD bgColor=#f9f9f9 height=30> <DIV align=center><A onmouseover="javascript:this.style.cssText='CURSOR: hand;'" style="CURSOR: hand" href="http://www.higrademould.com/admin/news/newsen167.htm" target=_blank>China plastic mold industry develops rapidly</A></DIV></TD> <TD width="33%" bgColor=#f9f9f9 height=30> <DIV align=center>2010-7-13</DIV></TD></TR> <TR> <TD bgColor=#f9f9f9 height=30> <DIV align=center><A onmouseover="javascript:this.style.cssText='CURSOR: hand;'" style="CURSOR: hand" href="http://www.higrademould.com/admin/news/newsen166.htm" target=_blank>Electronic business affairs will affect mold industry marketing concept</A></DIV></TD> <TD width="33%" bgColor=#f9f9f9 height=30> <DIV align=center>2010-7-6</DIV></TD></TR> <TR> <TD bgColor=#f9f9f9 height=30> <DIV align=center><A onmouseover="javascript:this.style.cssText='CURSOR: hand;'" style="CURSOR: hand" href="http://www.higrademould.com/admin/news/newsen165.htm" target=_blank>Dents and holes injection molding products</A></DIV></TD> <TD width="33%" bgColor=#f9f9f9 height=30> <DIV align=center>2010-6-30</DIV></TD></TR> <TR> <TD bgColor=#f9f9f9 height=30> <DIV align=center><A onmouseover="javascript:this.style.cssText='CURSOR: hand;'" style="CURSOR: hand" href="http://www.higrademould.com/admin/news/newsen164.htm" target=_blank>The features of the mould industry</A></DIV></TD> <TD width="33%" bgColor=#f9f9f9 height=30> <DIV align=center>2010-6-22</DIV></TD></TR></TBODY></TABLE></DIV> <DIV>&nbsp;</DIV></td> </tr> </table> </div></td> </tr> <tr> <td><div align="center"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="75%" height="35" align="left"><div align="center">Author:Annie</div></td> <td align="center"><div align="center">Time:2010-7-27</div></td> </tr> </table> </div></td> </tr> </table> </td> </tr> </table></td> </tr> </table></td> </tr> <tr> <td height="63" bgcolor="#EAEAEA"> <table width="98%" border="0" cellspacing="1" cellpadding="1"> <tr> <td colspan="3" height=3></td> </tr> <tr> <td width="5%"><div align="center"><img src="../../images/bottom_block.jpg" width="8" height="35"></div></td> <td width="86%" class="STYLE3_2">Copyright&nbsp;&copy;&nbsp;:Higrade(Qingdao) Moulds &amp; Products Co., Ltd.&nbsp;&nbsp;&nbsp;&nbsp;Add: No.1009,Chongqing Road,Qingdao City,Shandong Prov.,China<BR> Tel:+86-532-84819378&nbsp;&nbsp;&nbsp;&nbsp;Fax:+86-532-84819379&nbsp;&nbsp;&nbsp;&nbsp;Website:<A href="http://www.higrademould.com">http://www.higrademould.com</A>&nbsp;&nbsp;&nbsp;&nbsp;E-mail:<A href="mailto:higrademould@vip.163.com">higrademould@vip.163.com</A></td> <td width="9%"><a href="#" target="_blank"><img src="../../beiannew/logo.gif" width="31" height="32" border="0"></a><a href="http://218.57.19.118/" target="_blank"><img src="../../beiannew/01.gif" width="28" height="35" border="0"></a></td> </tr> </table> </td> </tr> <tr> <td height="10" bgcolor="#FFFFFF"></td> </tr> </table> <table width="1003" border="0" cellspacing="0" cellpadding="0"> <tr> <td><div align="center"></div></td> </tr> </table> <!-- End ImageReady Slices --> </body> </html>