【正文】 parts are the typical ones in auto products in which warp is the main defect and the deviations from shape which are caused by warps can also affect the quality of the product. Plastic injection is a nonlinear and flexible multifactors manufacturing process. In this process, the parameters influence on each other and change with the time. So every parameter has a different impact on the final quality. To decrease the defective parts in production and improve the quality of the production, we need to control the technology parameter in the whole cycle. Only in this way can we keep the final product quality in a best sphere and ensure the product has a high quality. The injection molding process parameters were identified in this paper. Warpage of injection molding through the analysis to determine the cause warping deformation in order to ascertain Injection Parts of the shell warping deformation of the impact of factors, as well as car shell of injection molding process of warping control deficiencies. Warpage of the waste generated significantly lower rates, reduce the risk of secondary processing and cost, have obvious economic benefits. Keywords： thinwall inject molding。為了減少最終制件的質(zhì)量缺陷，提高生產(chǎn) 質(zhì)量，需要對(duì)整個(gè)成型周期中工藝參數(shù)進(jìn)行控制，使對(duì)最終制件質(zhì)量影響較大的工藝參數(shù)能保持在最佳范圍內(nèi)，從而確保制件質(zhì)量達(dá)到最優(yōu)。汽車注塑薄殼件是一種典型的注塑加工零件，翹曲是其制造過程中的主要缺陷。這是因?yàn)殡S著塑件壁 不斷變薄，聚合物熔體在型腔中冷卻迅速，使得成型難度加大，導(dǎo)致聚合物熔體在薄 壁型腔內(nèi)的流動(dòng)行為也與常規(guī)注塑成型有所不同 。由于此過程具有多個(gè)參數(shù)相互作用并隨時(shí)間變化的特性，所以每個(gè)參數(shù)對(duì)最后制件質(zhì)量的優(yōu)劣都具有不同程度的影響。使翹曲變形產(chǎn)生的廢品率大大降低，減少了二次加工的幾率和成本，產(chǎn)生了明顯的經(jīng)濟(jì)效益。 improve the quality Abstract I 目錄 摘 要 .........................................................................................................................................1 Abstract ................................................................................................................................... II 1 緒 論 .....................................................................................................................................3 引言 .............................................................................................................. 3 汽車薄壁件翹曲變形的國(guó)內(nèi)外研究現(xiàn)狀 ............................................................ 4 國(guó)外的研究現(xiàn)狀 .......................................................................................... 4 國(guó)內(nèi)的研究現(xiàn)狀 .......................................................................................... 4 論文工作內(nèi)容 ................................................................................................ 5 課題的主要研究?jī)?nèi)容 .................................................................................... 5 課題采取的技術(shù)路線 .................................................................................... 5 2 注塑成型 ...............................................................................................................................6 塑料及其性能 ................................................................................................ 6 塑料組成及分類 .......................................................................................... 6 塑料的優(yōu)點(diǎn)及應(yīng)用領(lǐng)域 ................................................................................ 7 注塑成型工藝參數(shù) .......................................................................................... 8 主要工藝參數(shù) .............................................................................................. 8 工藝參數(shù)對(duì)注塑成型的影響 .......................................................................... 8 注塑機(jī) .......................................................................................................... 9 注塑系統(tǒng) .................................................................................................... 9 鎖模裝置 .................................................................................................. 10 液壓傳動(dòng)與電器控制系統(tǒng) ........................................................................... 10 注塑成型過程 .............................................................................................. 10 塑化 ......................................................................................................... 10 填充 ......................................................................................................... 10 保壓 ......................................................................................................... 11 冷卻 ......................................................................................................... 11 3 翹曲變形 .............................................................................................................................12 概述 ...............................................................................