【正文】
d, the design of plastic mold plays an irreplaceable role in realizing the requirement of part’s processing, using and appearance. In this paper, the automobile interior is designed as the specific example for injection process analysis and mold design. In addition to the process analysis and calculation, there are also the process of Moldflow Simulation and UG mold design. Through the process analysis and calculation, we can choose the suitable injection molding machine, design the mold base, the feed system, forming parts, positionoriented institutions, Demoulding agencies, side core slide and cooling system rationally. Using the Moldflow software to simulate the process of filling, material flowing, warpage and cooling for the purpose of optimizing the molding process parameters, the feed system and cooling system. Then, we can improve the quality of the die. At the same time, with the application of UG39。本文以汽車內(nèi)飾件為具體實(shí)例進(jìn)行注塑工藝分析與模具設(shè)計(jì),除了工藝分析計(jì)算,還包括 Moldflow 成型過(guò)程模擬和 UG 模具設(shè)計(jì)。畢業(yè)論文(設(shè)計(jì)) I 汽車內(nèi)飾件的注塑成型工藝分析與模具設(shè)計(jì) 摘要 隨著科學(xué)技術(shù)的發(fā)展,塑料注射成型已經(jīng)廣泛應(yīng)用于汽車行業(yè),在國(guó)民經(jīng)濟(jì)中占有重要地位。通過(guò)工藝分析計(jì)算,選擇合適的注塑機(jī),合理設(shè)計(jì)模具的模架、澆注系統(tǒng)、成形零件、導(dǎo)向定位機(jī)構(gòu)、脫模機(jī)構(gòu)、側(cè)抽芯機(jī)構(gòu) 及冷卻系統(tǒng)。s Moldwizard, we can make full use of standard parts and improve the efficiency in the process of mold design. Keywords: feed system。 Optimization 畢業(yè)論文(設(shè)計(jì)) I 目錄 1 引言 .............................................................. 1 2 塑件工藝分 析 ...................................................... 2 塑件成型工藝分析 ............................................ 2 原料( ABS)的成型特性、性能指標(biāo)與工藝參數(shù) .................... 2 成型特性 ............................................... 2 性能指標(biāo) ............................................... 3 工藝參數(shù) ............................................... 3 3 注塑機(jī)選擇 ........................................................ 4 注塑機(jī)初選 .................................................. 4 注塑機(jī)校核 .................................................. 4 4 成型零件設(shè)計(jì) ...................................................... 7 成型零件結(jié)構(gòu)設(shè)計(jì) ............................................ 7 成型零件鋼材選用 ............................................ 7 成型零件的力學(xué)計(jì)算 .......................................... 7 定位楔塊設(shè)計(jì) ............................................... 12 5 澆注系統(tǒng)設(shè)計(jì) ..................................................... 14 澆注系統(tǒng)的組成及設(shè)計(jì)原則 ................................... 14 流道及澆口設(shè)計(jì) ............................................. 14 主流道設(shè)計(jì) ............................................ 14 冷料穴設(shè)計(jì) ............................................ 16 分流道設(shè)計(jì) ............................................ 17 澆口設(shè)計(jì) .............................................. 18 拉料桿設(shè)計(jì) ............................................ 19 型腔壓力估算 ............................................... 21 6 分型面及排氣槽設(shè)計(jì) ............................................... 22 分型面設(shè)計(jì) ................................................. 22 排氣槽設(shè)計(jì) ................................................. 22 7 冷卻系統(tǒng)設(shè)計(jì) ..................................................... 24 目錄 II 模具溫度調(diào)節(jié)的必要性 ....................................... 24 模具溫度調(diào)節(jié)對(duì)塑件質(zhì)量的影響 .......................... 24 模具溫度調(diào)節(jié)對(duì)生產(chǎn)效率的影響 .......................... 24 無(wú)定型塑料薄壁塑件冷卻時(shí)間的計(jì)算 ........................... 24 冷卻系統(tǒng)的計(jì)算 ............................................. 25 冷卻回路布置 ............................................... 27 8 導(dǎo)向與定位機(jī)構(gòu)設(shè)計(jì) ............................................... 28 導(dǎo)向機(jī)構(gòu)設(shè)計(jì) ............................................... 28 定位圈設(shè)計(jì) ................................................. 29 9 脫模機(jī)構(gòu)設(shè)計(jì) ..................................................... 30 脫模機(jī)構(gòu)選擇 ............................................... 30 脫模力計(jì)算 ................................................. 30 推桿脫模機(jī)構(gòu)設(shè)計(jì) ........................................... 31 澆注系統(tǒng)凝料脫出限位機(jī)構(gòu)設(shè)計(jì) ............................... 34 10 抽芯機(jī)構(gòu)設(shè)計(jì) .................................................... 36 側(cè)抽機(jī)構(gòu)選擇 .............................................. 36 抽拔距計(jì)算 ................................................ 36 斜推桿的斜角 ? ............................................. 36 11 注塑機(jī)與注射模的關(guān)系 ............................................ 37 安裝參數(shù)校核 .............................................. 37 開模行程校核 .............................................. 37 成型過(guò)程模擬 ........................................... 38 塑件平均厚度 .............................................. 38 導(dǎo)入實(shí)體 .................................................. 38 劃分網(wǎng)格 .................................................. 38 重新網(wǎng)格劃分 .............................................. 39 網(wǎng)格診斷并修復(fù) ............................................ 40 澆注系統(tǒng)分析 .............................................. 42 冷卻系統(tǒng)分析 .............................................. 56 畢業(yè)論文(設(shè)計(jì)) III 13 UG 模具設(shè)計(jì) ..................................................... 63 模具設(shè)計(jì)過(guò)程 .............................................. 63 模具三維圖形 ............................................... 69 14 結(jié)論 ............................................................ 70 致謝 ............................................................... 71 參考文獻(xiàn) ........................................................... 72 畢業(yè)論文(設(shè)計(jì)) 1 1 引言 工程塑料質(zhì)量輕,不腐蝕,絕緣性好,易成型,越來(lái)越被汽車業(yè)界認(rèn)識(shí)和接受,工程塑料在汽車中應(yīng)用也就變得越來(lái)越廣泛,所以,塑料模具的應(yīng)用也越來(lái)越廣泛。 塑料模技術(shù),包括設(shè)計(jì)技術(shù)、材料選擇、加工技術(shù)管理與維修技術(shù)等多種領(lǐng)域,屬于系統(tǒng)工程技術(shù)。 然后,應(yīng)用 Moldflow 分析軟件劃分網(wǎng)格,對(duì)澆口位置進(jìn)行模擬,對(duì) 注塑過(guò)程進(jìn)行填充、料流、翹曲進(jìn)行模擬,在確定澆注系統(tǒng)時(shí)得到理想的塑料熔體流動(dòng)形式、控制熔接痕的形成位置、減小制品可能發(fā)生的翹曲變形;同時(shí),對(duì)幾種冷卻通道布置進(jìn)行冷卻分析,根據(jù)分析結(jié)果選擇最佳設(shè)計(jì)方案,并確定該通道合適的水流速度、水溫、模具溫度等參數(shù),從而優(yōu)化成型工藝參數(shù),確定澆注系統(tǒng)和冷卻系統(tǒng)。 原料( ABS)的成型特性 、性能指標(biāo) 與工藝參數(shù) 查《中國(guó)模具設(shè)計(jì)大典》表 ,苯乙烯 丁二烯 丙烯腈共聚物( ABS),綜合性能較好,沖擊韌度、力學(xué)強(qiáng)度較高,選用成型汽車內(nèi)飾件,可提高汽車的安全系數(shù),減輕碰撞時(shí)對(duì)人體造成得傷害;尺寸穩(wěn)定,耐化學(xué)性、電氣性能良好,易于成形和機(jī)械加工。 所選注塑機(jī)的最大注射量以最大注射容積標(biāo)定,按如下公式校核: 131 VVK ? 式中, 1K ─利用系數(shù), ?K ; 3V ─注塑機(jī)最大注射量 33 2622cmV ? ; 331 cmVK ??? 31 cmV ? 故 131 VVK ? ,注塑機(jī)滿足要求。 經(jīng)過(guò) Moldflow 分析,注射成型所需的鎖模力約為 6500 KN,所選注塑機(jī)不滿足要求,查《塑料注射模具 設(shè)計(jì)實(shí)