【正文】
從內(nèi)容、方式、條件、資源、教學(xué)能力等幾方面進行改革,激發(fā)學(xué)生學(xué)習(xí)興趣,提高教學(xué)效率,促進塑料模具行業(yè)的發(fā)展。三、優(yōu)化教學(xué)條件對實際的工作環(huán)境進行模擬,建立設(shè)備完善的實訓(xùn)教室,根據(jù)需要添加、更新實訓(xùn)設(shè)備,比如不同類型及典型塑料模具,通過優(yōu)化學(xué)校的教學(xué)條件,使其符合實際工作環(huán)境,增強實訓(xùn)基地的建設(shè),利用社會和本土資源,讓學(xué)生頂崗實習(xí),在不同的環(huán)境下體驗不同的工作崗位。在模具拆裝室進行模具結(jié)構(gòu)的授課,讓學(xué)生通過現(xiàn)場模具的拆裝直觀的了解模具的結(jié)構(gòu),加深印象。在進行項目選取的時候,應(yīng)該選擇具有模具典型結(jié)構(gòu)的常見零件,并且通過老師對教學(xué)內(nèi)容進行分析,把需要理解的課本知識重點融合到項目中,進行理論與實踐相結(jié)合的教學(xué)模式。二、改革教學(xué)方式第一,把實際項目作為載體,依據(jù)產(chǎn)品和工作任務(wù)作為教學(xué)的內(nèi)容與過程。機械制圖可以選取比較典型的零件進行測量。第三,基本設(shè)計課程,主要包括金屬材料與熱處理、機械制圖、模具制造工藝以及互換性與技術(shù)測量等。一、改革教學(xué)內(nèi)容在對教學(xué)內(nèi)容進行改革的時候,應(yīng)該依據(jù)具體的實際崗位需要,合理的設(shè)置教學(xué)課程?!娟P(guān)鍵詞】塑料模具模具設(shè)計教學(xué)改革中圖分類號:G4文獻標(biāo)識碼:A DOI:塑料模具設(shè)計是一項理論與實踐相結(jié)合,專業(yè)性比較強的課程,也是模具專業(yè)核心課程,其中一些課程對于學(xué)生來說很難理解、很難看懂,對老師來說也比較難教,例如壓縮模設(shè)計、塑料成型工藝以及氣動成型等。(6)頂出形式兩側(cè)頂出,孔徑Φ40㎜,孔距280㎜。(2)注射壓力已知P注=70~120,P公=130MPa則P公≥P注,適合。由于塑件小型()、薄壁(㎜)塑件,且成型工藝對模溫要求不高,也可采用自然冷卻。注意事項:導(dǎo)柱長度要足夠,以保證推出模具時推板留在模具上。澆口采用側(cè)澆口,查表《矩形側(cè)澆口基本尺寸》,已知材料為聚丙烯(PP),㎜,塑件簡單,則澆口厚度h=(~)㎜,取h=㎜。主流道進口端直徑D1=,長度L有裝配決定,完整尺寸見附錄澆口套零件圖。開模行程=+25+10=<最大開合模行程500,合理。因此,應(yīng)選用大一點型號的注射機,選擇XSZY250,其規(guī)格參數(shù)如下:最大注射量 250㎝179。標(biāo)準(zhǔn)化取B板厚度HB=80。采用推板推出機構(gòu),動模無支承肥皂盒設(shè)計說明書板,則應(yīng)選擇DI型。肥皂盒設(shè)計說明書圖8 型芯圖9 型腔按公式LM=LS(1+S)計算??紤]大批量生產(chǎn),優(yōu)先使用模具鋼,為了節(jié)省貴重鋼材,型腔與型芯應(yīng)該優(yōu)先選用組合式結(jié)構(gòu)。(4)制定注射成形工藝參數(shù)查表,聚丙烯(PP)的注射成形工藝參數(shù)如下:溫度(℃)噴嘴溫度170~190 料筒溫度 段190~200,中段200~220,后段160~170 模具溫度40~80 壓力(MPa)注射壓力70~120 保壓壓力50~60肥皂盒設(shè)計說明書時間(S)注射時間0~5 保壓時間20~60 冷卻時間15~50 成形周期40~120 (1)分型面的選擇首先確定模具的開模方向為模具的軸線方向,根據(jù)分型面應(yīng)該選擇在塑件最大輪廓處、滿足塑件外觀要求等原則,所以此塑件的分型面應(yīng)該選在肥皂盒蓋的地面處,如圖6所示圖6 分型面(2)型腔布局采用一模兩腔結(jié)構(gòu),型腔間隔約30㎜。估計Vj=6㎝179。Vs+V)/K 式中Vmax―――注射機的最大注射量(㎝179。聚丙烯(PP)~㎝179。圖4 壁厚分析 圖5 拔模分析通過以上分析可知,此塑件可以采用注射成型生產(chǎn)。㎜,㎜。但溫度過高會產(chǎn)生翹曲變形。最低使用溫度15℃,低于35℃時會脆裂?!M179。肥皂盒設(shè)計說明書圖1 產(chǎn)品圖圖2產(chǎn)品實物圖肥皂盒設(shè)計說明書模具設(shè)計任務(wù)書 訂貨單位地址 常州市新北區(qū)18號 常州華威模具公司 常州市新北區(qū)18號 肥皂盒蓋 PC ~% 白色 g ㎝178。 active mockup Alongside user interaction, there has also been work done on how the system handles large , while this is something that most vendors work on with each release, UGS has a pretty impressive ace up its sleeve – namely, is the lightweight data exchange format that many organisations(such as Ford)have based their data management and visualisation processes on and the pany has many years of expertise in handling large, plex datasets in an efficient knowledge has been brought to bear in the NX 5 release with some new technology that initially makes loading large scale datasets more also makes working with that data more efficient as well as providing some new system will load a JTbased facetted version of your assembly, meaning that all the extraneous information isn’t loaded and doesn’t impact manipulation or you zoom in and out, the system decimates the data, removing small features and parts to make it more unlike many other systems, you can actually perform a lot of work with this facetted can section it, measure it accurately(as it can intelligently load the brep model that’s stored in the JT format alongside the facet data)but you can also conduct some Digital MockUp processes that would typically require a separate , UGS has integrated Digital MockUp tools to handle things like large scale visualisation, realtime rendering, Dynamic Clearance and Clash Detection as well as Extraction Path Planning, which allow you to find out if ponents can be removed from within an assembly for service and repair last feature has been part of the UGS offering as Teamcenter Visualisation for some time, but this is the first time it’s bee