注塑成型加工條件對(duì)收縮和翹曲的顯著影響研究[外文翻譯]

英文字符：39875
中文字?jǐn)?shù)：9630

　　　　　　　　　　　　　　　　　　　　　　　　　　　　
摘要:在注塑行業(yè)中的一個(gè)具有挑戰(zhàn)性的任務(wù)是設(shè)置最佳的成型條件，以盡量減少收縮和翹曲（S&W）。本研究的目的是區(qū)分這兩個(gè)詞，并通過實(shí)驗(yàn)和數(shù)值方法相結(jié)合進(jìn)行透徹的分析。本研究對(duì)個(gè)別的工藝參數(shù)進(jìn)行了檢查，并采用單因素方差（ANOVA）分析，在實(shí)驗(yàn)時(shí)區(qū)分每個(gè)變量的意義。結(jié)果表明，不同加工條件對(duì)收縮的影響是向上翹曲。具體來說，保壓影響收縮是最重要的，而保壓時(shí)間是確定翹曲的主要因素。收縮保壓壓力的反應(yīng)是單調(diào)的，而翹曲圖顯示了一個(gè)U形的變化。因此S&W的差別可以幫助提高產(chǎn)品的質(zhì)量。
　　　　　　　
關(guān)鍵詞：注塑加工；聚丙烯；方差分析

A Study on the Distinguishing Responses of Shrinkage and Warpage to Processing Conditions in Injection Molding

ABSTRACT: A challenging task in injection molding industry is to minimize shrinkage and warpage (S&W) through optimal setting of molding conditions. In determining the relationship between molding conditions and product dimension, most existing literature considered S&W as a whole entity or focused on only one of them. The intention of this study was to distinguish these two terms, and perform a thorough analysis on the effect of operative conditions on S&W during injection molding process through a combination of experimental and numerical methods. Six process parameters with five levels were examined on a box-shaped product, and the single factor analysis of variance (ANOVA) was adopted in dentifying the significance of each variable in the experiment. Results indicated that the effect of processing conditions on shrinkage is different from that on warpage. Specifically, packing pressure affects shrinkage most while packing time is the dominant factor in determining warpage. The reaction of shrinkage to packing pressure is monotonic, whereas the plot of warpage shows a U-shaped variation. A differential treatment of S&W can therefore help to enhance product quality. VC 2011 Wiley Periodicals, Inc. JAppl Polym Sci 125: 731–744, 2012

Key words: injection molding; processing; poly(propylene);ANOVA