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</dd> </dl> </div> </div> </div> <div class="main_right"> <div class="sitemap"><a href="/">首页</a> > <a href="/news/cjwt/">常见问题</a> > 详细内容 > ä¸œèŽžå¡‘胶制品分析注塑加工中开裂的问题</div> <div class="content"> <div class="news_xaingxi"><h1>东莞塑胶制品分析注塑加工中开裂的问题</h1></div> <div class="news_author"> 来源åQ?a href='http://www.streetfighter4.com/news/89.html'>http://www.streetfighter4.com/news/89.html</a>   å‘布旉™—´åQ?018-05-25 </div> <div class="news_content"> <p><a target="_blank" href="http://www.streetfighter4.com/news/89.html"><b><a href="http://www.streetfighter4.com/" target="_blank" style="font-weight:bold">东莞塑胶制品</a></b>分析注塑加工中开裂的问题</a><br /> 注塑加工是指使用注塑成型机把塑料加热塑化熔融åQŒç„¶åŽå†æ³¨å°„到成型模å…ïL©ºè…”内成型åQŒç»å†·å´é™æ¸©åQŒç†”体固化后脱模åQŒæ³¨å¡‘成型机注射成型的制品。注塑äñ”品品¿Uæ¯”较繁多应用范围也比较òq¿ï¼Œç‰¹åˆ«æ˜¯åœ¨ç”µå­åŠ å·¥ã€è½»å·¥ä¸šå’Œæ±½è½¦åˆ¶é€ ä¸šä¸­ï¼Œæœ‰å¤š¿UåŞ状注塑制品作配äšgã€?br /> 塑胶加工˜q‡ç¨‹ä¸­å¼€è£‚是注塑生äñ”中普遍存在的现象åQŒä¹Ÿä¼šå¯¹äº§å“çš„质量和¾læµŽæ•ˆç›Šç”Ÿäñ”直接的媄响。现ž®×ƒ»ŽåŠ å·¥æŠ€æœ¯ã€ææ–™è´¨é‡ä¸Žæ¨¡å…·¾_‘Ö¯†åº¦è¿™ä¸‰æ–¹é¢å…¥æ‰‹è¿›è¡Œåˆ†æžã€?br /> A、加工技术:<br /> 1、加工压力过大、速度˜q‡å¿«ã€å……料愈多、注ž®„、保压时间过长,都会造成内应力过大而开è£?<br /> 2、调节开模速度与压力防止快速强拉制仉™€ æˆè„±æ¨¡å¼€è£?<br /> 3、注ž®„压力太低或者注ž®„速度˜q‡å¿«;<br /> 4、预防由于熔接痕åQŒå¡‘料降解造成机械强度变低而出现开è£?<br /> 5、适当使用脱模剂,注意¾lå¸¸æ¶ˆé™¤æ¨¡é¢é™„着的气雄¡­‰ç‰©è´¨;<br /> 6、制件残余应力,可通过在成型后立即˜q›è¡Œé€€ç«çƒ­å¤„理来消除内应力而减ž®‘裂¾U¹çš„生成;<br /> <p> 7、无润滑或有润滑但效果不ä½? </p> <p style="text-align:center;"> <img src="http://www.streetfighter4.com/uploads/news/20180525070254.jpg" width="500" height="400" title="塑胶制品" align="" alt="塑胶制品" /> </p> 8、适当调高模具温度åQŒä‹É制äšg易于脱模åQŒé€‚当调低料温防止分解;<br /> 9、生产äñ”品时åQŒç”±äºŽå¡‘料在模腔中的不均匀冷却和不均匀收羃以及产品¾l“构设计的不合理åQŒå®¹æ˜“引起äñ”品的各种¾~ºé™·;<br /> 10、塑化不良,即熔体不能完全均匀地相ç†?<br /> B、材料质量:<br /> 1、再生料含量太高åQŒé€ æˆåˆ¶äšg强度˜q‡ä½Ž;<br /> 2、湿度过大,造成一些塑料与水汽发生化学反应åQŒé™ä½Žå¼ºåº¦è€Œå‡ºçŽ°é¡¶å‡ºå¼€è£?<br /> 3、原材料中杂质或再生料超æ ?<br /> 4、原材料含水量过å¤?<br /> 5、材料本íw«ä¸é€‚宜正在加工的环境或质量‹Æ ä½³åQŒå—到污染都会造成开裂ã€?br /> 6、原料中易挥发物­‘…出标准;<br /> C、模å…ïL²¾å¯†åº¦:<br /> 1、顶å‡ø™¦òqŒ™¡¡åQŒå¦‚™å¶æ†æ•°é‡ã€æˆªé¢ç§¯è¦èƒö够,脱模斜度要èƒö够,型腔面要­‘›_¤Ÿå…‰æ»‘åQŒè¿™æ äh‰é˜²æ­¢ç”׃ºŽå¤–力å¯ÆD‡´™å¶å‡ºŒD‹ä½™åº”力集中而开裂ã€?br /> 2、制件结构不能太薄,˜q‡æ¸¡éƒ¨ä†¾åº”尽量采用圆弧过渡,避免ž®–角、倒角造成应力集中ã€?br /> 3、尽量少用金属嵌ä»Óž¼Œä»¥é˜²æ­¢åµŒä»¶ä¸Žåˆ¶äšg收羃率不同造成内应力加大ã€?br /> 4、制模工è‰ÞZ¸å®Œå–„åQŒä¸»è¦è¡¨çŽ°åœ¨å‡¸ã€å‡¹æ¨¡é”»å¯å†…在质量差åQŒçƒ­å¤„理技术及工艺有问题,造成凸、凹模淬不透,有èÊY点及¼‹¬åº¦ä¸å‡;<br /> 5、对深底制äšg应设¾|®é€‚当的脱模进气孔道,防止形成真空负压;<br /> 6、主‹¹é“­‘›_¤Ÿå¤§ä‹É‹¹‡å£æ–™æœªæ¥å¾—及固化时脱模åQŒè¿™æ äh˜“于脱æ¨?<br /> 7、主‹¹é“衬套与喷嘴接合应当防止冷¼‹¬æ–™çš„拖拉而ä‹É制äšg¾_˜åœ¨å®šæ¨¡ä¸?<br /> 8、模å…ïL»“构设计问题,冲模¾l“构不合理。细长凸模没有设计加å›ø™£…¾|®ï¼Œå‡ºæ–™å£ä¸ç•…出现堆集,卸料力过大ä‹É凸模承受交变载荷加剧½{?<br /> 9、模å…äh¸©åº¦è¿‡ä½Žå’Œç†”体的流动性太å·?<br /></p> <div class="pagess"><div>上一æ?<a href="90.html">东莞饰品厂家告诉您幼教玩å…ïLš„作用是什么呢åQ?/a></div> <div>下一æ?<a href="88.html">塑胶玩具厂家告诉您玩å…ïLš„分类</a></div> </div> <div class="info_key"> <span>相关标签åQ?a href='/key.aspx?k=%e5%a1%91%e8%83%b6%e7%8e%a9%e5%85%b7%e5%8e%82%e5%ae%b6'>塑胶玩具厂家</a>,<a href='/key.aspx?k=%e4%b8%9c%e8%8e%9e%e9%a5%b0%e5%93%81%e5%8e%82%e5%ae%b6'>东莞饰品厂家</a>,<a href='/key.aspx?k=%e4%b8%9c%e8%8e%9e%e5%a1%91%e8%83%b6%e5%88%b6%e5%93%81'>东莞塑胶制品</a>,</span> </div> </div> <div class="clear"></div> </div> <div class="zklist"> <div class="zklist-T"> 相关新闻</div> <div class="zklist-C"> <ul> <li> <a href="/news/103.html" title="东莞塑胶制品的保å…ÖM¸»è¦åˆ†å“ªä¸‰ç‚? 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