气辅注射成型技术

(29页)

'气辅注射成型技术'
氣輔注塑成型技術Gas-assisted Injection Moulding Technology 短射工藝 Short Shot Process 熔膠注射 氣體:大多採用氮氣 Polymer Injection Gas : Use Nitrogen, Mostly 氣體注射 Gas Injection 主要氣體穿透 Primary Gas型腔部份短射 PenetrationPartial Shotin Cavity 氣體注射 Gas Injection 二次氣體穿透 Secondary Gas Penetration 氣輔注射成型Gas-assisted Injection Moulding 模壁 Mould Wall 塑膠凝結層 熔膠 Frozen Layer 氣體 Gas Polymer of Polymer Melt 模壁 Mould Wall 氣體穿透熔膠的斷面圖 Cross-section of gas penetration through molten plastic 滿射工藝 Full Shot Process 熔膠注射 氣體:大多採用氮氣 Polymer Injection Gas : Use Nitrogen, Mostly 氣體注射 Gas Injection 型腔滿射 氣體注射 “Full” Shot Gas Injection in Cavity 初始氣體穿透 Initial Gas 最終氣體穿透 Penetration Final Gas Penetration 傳統和氣輔注射成型的壓力分布 傳統注射成型 Conventional Injection Moulding 氣輔注射成型 Gas-assisted Injection Moulding 氣輔注射成型的優點 Merits of Gas-assisted Moulding1. 低射壓、低鎖模力 Low injection pressure, low clamp force 2. 壓力分布均勻、收縮均勻、殘餘應力低、不易翹曲、尺寸穩定 Even pressure distribution, even shrinkage, lower residual stress, less warpage, more stable dimensions3. 消除縮痕、模面再現性高 Elimination of sink marks, better plastic mould surface replication4. 省塑料,可用強度和價格較低的塑料 Plastic material saving, replacement of stronger & more expensive plastic material5. 可用強度和價格較低的模具金屬(如鋁) Use of less strong and less expensive mould metal (e.g. aluminum)6. 厚薄件一體成型,減少模具和裝配線數目 Integration of thick and thin parts, less moulds and assembly lines needed7. 可用較厚的肋、角板等補強件,提高製件剛性,使得製件公稱厚度得以打薄 Use of thicker stiffeners (e.g. ribs, gussets, etc.) which increases part stiffness and makes thinner nominal thickness possible8. 增加設計自由度 More design flexibility 氣體進口位置 Gas Entrance Locations? 經噴嘴 ? 經流道 Through the Through Nozzle the Runner ? 直接進製品 Directly in the Part 典型問題 Typical Problems? 跑道現象 Race tracking effect? 氣體穿透不佳 Poor gas penetration? 氣體手指現象 Gas fingering? 氣體吹穿 Gas blow out ? 製品表觀 Part surface appearance 跑道現象 Race Tracking Effect 氣體穿透不佳 Poor Gas Penetration 氣體手指現象 Gas Fingering 氣體吹穿 Gas Blow Out 短射法氣輔注射成型設計指南Short Shot Gas-Assisted Injection Moulding Design Guide 選定一非外觀面作為最後充填區 Select one non-appearance surface as the last filled area. 距離非外觀面最遠處定氣口位置。 Locate gas entrance where is the farthest from a non-appearance surface. 短射法氣輔注射成型設計指南Short Shot Gas-Assisted Injection Moulding Design Guide 從氣口(上游)到上述非外觀面(下游)順流而下,勻稱 的配置氣道以涵蓋整個製品面。 From (upstream) gas entrance to above-mentioned (downstream) non-appearance surface, layout gas channels to cover the whole part surface evenly. 短射法氣輔注射成型設計指南Short Shot Gas-Assisted Injection Moulding Design Guide 氣道儘可能循二或多面交會處或粗厚處行,主氣 道以一氣(口)呵成(一氣道)為原則 。 Gas channel shall follow a line where two or more surfaces meet or where is thick. Each main gas channel, in principle, shall be penetrated by the gas from a specific gas entrance. 短射法氣輔注射成型設計指南Short Shot Gas-Assisted Injection Moulding Design Guide 以上述非外觀面為最後充填區,定澆口位置 。 Locate gates, targeting above-mentioned non- appearance surface as the last filled area. 微調澆口、氣口和氣道位置和尺寸,確保氣貫氣道 , 但不以鄰為壑。 Fine tune the location and dimensions of gates, gas entrances and gas channels to make sure gas will penetrate to the end, but not permeate to the neighborh
关 键 词:
气辅注射成型技术 ppt、pptx格式 免费阅读 下载 天天文库
 天天文库所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
关于本文
本文标题:气辅注射成型技术
链接地址: https://www.wenku365.com/p-44789511.html
关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服点击这里,给天天文库发消息,QQ:1290478887 - 联系我们

本站为“文档C2C交易模式”,即用户上传的文档直接卖给(下载)用户,本站只是中间服务平台,本站所有文档下载所得的收益归上传人(含作者)所有【成交的100%(原创)】。本站是网络服务平台方,若您的权利被侵害,侵权客服QQ:1290478887 欢迎举报。

1290478887@qq.com 2017-2027 https://www.wenku365.com 网站版权所有

粤ICP备19057495号 

收起
展开