【正文】 的設(shè)計(jì) ................................... 錯(cuò)誤 !未定義書簽。 鎖模力的校核 ....................................... 錯(cuò)誤 !未定義書簽。 一方面企業(yè)為追求規(guī)模效益，使得模具向著高速、精密、長壽命方向發(fā)展；另一方面企業(yè)為了滿足多品種、小批量、產(chǎn)品更新?lián)Q代快、贏得市場的需要，要求模具向著制造周期短、成本低的快速經(jīng)濟(jì)的方向發(fā)展。除自產(chǎn)自用外，市場銷售方面， 2021 年中國塑料模具總需求約為 313 億元人民幣，國產(chǎn)模具總供給約為 230億元人民幣，市場滿足率為 %。 第 3 頁 共 33 頁 1. 塑件的結(jié)構(gòu)工藝性分析 塑件的幾何形狀分析 塑件為一翻蓋，形狀如圖 所示。 150? 10000247。 通過對塑件結(jié)構(gòu)形式的分析，分型面應(yīng)選在端蓋面積最大且有利于開模取出塑件的平面 。 （ 4） 型腔和澆注系統(tǒng)投影面積的重心應(yīng)盡量接近注塑機(jī)鎖模力的中心。 圖 澆口小孔徑為 ~2mm 這里取 ，錐角度為 ?? 30~15 ，這里取 ?29 。如圖 圖 動模型芯固定板的設(shè)計(jì) 動模型芯固定板上開設(shè)有導(dǎo)滑槽， 限位釘孔，推桿孔等等，故形狀比較復(fù)雜，且相對較難加工。 、出口水溫度的差值。 當(dāng)高壓的塑料熔體充滿模具型腔時(shí)，會在型腔內(nèi)產(chǎn)生一個(gè)很大的壓力，該力試圖使模具沿分型面漲開，其值等于塑件和流道系統(tǒng)在分型面上的投影面積乘以型腔內(nèi)塑料壓力。 第 24 頁 共 33 頁 模具總裝配圖 第 25 頁 共 33 頁 Pro/E 軟件 在這次設(shè)計(jì)中也起到了很大的作用，運(yùn)用 Pro/E 畫好零件圖，通過裝配，構(gòu)成總裝圖，并且可以通過 Pro/E 導(dǎo)出零件三視圖，再通過 CAD 進(jìn)行修 改與標(biāo)注。只不過，少了相應(yīng)的配合尺寸，也沒有他精確的形位公差，只不過在標(biāo)準(zhǔn)模架的基礎(chǔ)上，稍加修改，比如，標(biāo)準(zhǔn)模架上給的復(fù)位桿位置與設(shè)計(jì)的滑塊位置相沖突，故不用，重 新定義復(fù)位桿位置與數(shù)量?！钡轿疫@最終的畢業(yè)設(shè)計(jì)，希望給這十八年畫個(gè)圓滿的句號。s Day. More and more young Chinese people begin to celebrate this day in a very similar way as that in western countries. Fewer people than ever will gaze at the heavens on Saturday to pick out the two stars shining bright on either side of the Milky Way, that is, if people even know on which day Qixi falls. There are ready reminders dotted about, in the form of big ads saying Sales on Chinese Valentine39。而，與型芯、楔緊塊、導(dǎo)柱，帶套，推桿和復(fù)位桿等之間還有配合的要求。 調(diào)節(jié)鎖模機(jī)構(gòu)，保證有足夠的開模距離及鎖模力，使模具閉合適當(dāng)。 注射量的校核 根據(jù)生產(chǎn)經(jīng)驗(yàn)，注射機(jī)的最大注射量是其允許最大注射量的 80%，所以，實(shí)際、注射量應(yīng)小于最大折射量。為了調(diào)節(jié)型腔的溫度，需在模具內(nèi)開設(shè)冷卻水道，通過模溫調(diào)節(jié)機(jī)調(diào)節(jié)冷卻介質(zhì)的溫度。如圖 。常見的澆口形式有邊緣澆口、扇形澆口、平縫澆口、圓環(huán)澆口、輪輻澆口、爪型澆口、點(diǎn)澆口、潛伏式澆口、護(hù)耳澆口、直澆口等十種。內(nèi)壁有 ~ m?以下的粗糙度，在內(nèi)壁研磨和拋光時(shí)應(yīng)注意拋光方向，不形成垂直于拔出方向的劃痕，否則會發(fā)生脫出困難。 (3)便于塑件順利脫模，盡量使塑件開模時(shí)留在動模一邊 (4)注塑機(jī)的推出機(jī)構(gòu)在動模一側(cè)，故分型面應(yīng)盡量選在能使制品留在動模一側(cè)的地方， (5)分型面不應(yīng)影響塑件的尺寸精度，精度要求高的塑件部分，若被分型面所分割會由于合模不準(zhǔn)確而造成尺寸上的誤差。 計(jì)算制件的體積和質(zhì)量 利用 Pro/e 繪制出塑件的三維圖。但注塑模的商品化軟件在功能和精度上還有待于進(jìn)一步發(fā)展。現(xiàn)在，這 3 個(gè)省份的不少企業(yè)已意識到塑模業(yè)的無限商機(jī)，正積極組織模具產(chǎn)品的開發(fā)制造。因此，研究與設(shè)計(jì)最新型、材料利用率最高的注塑模具對注塑工業(yè)的發(fā)展具有非常重大的意義。 排氣系統(tǒng)的設(shè)計(jì) .................................... 錯(cuò)誤 !未定義書簽。 澆注系統(tǒng)的設(shè)計(jì) ..................................... 錯(cuò)誤 !未定義書簽。正確選擇模架，校核推出行程。 關(guān)鍵詞： 翻蓋；注射模；側(cè)抽芯。 主流道 、 主流道襯套 的 設(shè)計(jì) ....................... 錯(cuò)誤 !未定義書簽。 .................... 錯(cuò)誤 !未定義書簽。 國內(nèi)外的現(xiàn)狀 模具技術(shù)己成為衡量一個(gè)國家產(chǎn)品制造水平的重要標(biāo)志之一。 前些年，我國模具生產(chǎn)廠點(diǎn)約有 3 萬多家，從業(yè)人數(shù) 80 多萬人。今后的研究和發(fā)展工作在于精度的數(shù)字化技術(shù)，對復(fù)雜形狀的產(chǎn)品進(jìn)行數(shù)據(jù)采集，且采集工作要快而精確，并直接建立線框模型。通過分析 — 模具 — 質(zhì)量屬性求出塑件的體積與質(zhì)量。 (6)一般側(cè)向分型抽芯機(jī) 構(gòu)的抽拔距離都較小，選擇分型面時(shí)應(yīng)將抽芯或分型距離長的一邊放在動定模的開模方向上，短的一邊作側(cè)抽芯。 第 10 頁 共 33 頁 圖 分流道的設(shè)計(jì) 分流道的設(shè)計(jì)原則有以下四點(diǎn)： （ 1） 盡量保證各型腔同時(shí)充滿，并均勻的補(bǔ)料，以保證同模各塑件的性能、尺寸盡可能一致 。 本設(shè)計(jì)采用潛伏式澆口，又名隧道式澆口，潛伏式澆口斷面形狀和尺寸類似于點(diǎn)交口。 第 14 頁 共 33 頁 圖 圖 定模型芯的結(jié)構(gòu)設(shè)計(jì) 本設(shè)計(jì)的定模型芯設(shè)計(jì)為一凸臺，固定在定模上，由于塑件在分型面上并不是封閉 第 15 頁 共 33 頁 的，且分型面為一階梯型平面，故型芯也有高低平臺，并且為了與動模型芯相互切合，也有一定的角度要求。 冷卻裝置的設(shè)計(jì)一般要遵循以下幾項(xiàng)原則： ，冷卻回路盡量多，冷卻孔徑要盡量大。由此有 Vmax*85% ≥ Vz + Vj Vmax—注射機(jī)允許的最大注射量 cm3 Vmax = 75cm3 Vj—澆注系統(tǒng)所需塑件的體積 cm3 Vj = ? Vz –塑件的體積 cm3。 慢慢開啟模板到模板停止，調(diào)節(jié)頂出裝置，保證頂出距離開啟模具觀察頂出機(jī)構(gòu)運(yùn)動情 況，動作是否平穩(wěn)、靈活、協(xié)調(diào)。模板在銑床上加工后還要經(jīng)過磨床加工分型面以達(dá)到規(guī)定的粗糙度要求。s Day! in shops, hotels and restaurants. But few young women will mark the festival with their boyfriends, or take part in traditional activities to pray for cleverness. A largescale of exhibition on the Silk Road opened to the public in the National Museum on Thursday. The exhibition displays more than 400 treasures from Shaanxi province, Gansu province and 14 other regions. It is largest scale exhibition that shows the history of the Silk Road in recent years. As APEC is going on in Beijing, the exhibit aims to show the world this brilliant section of history. The Silk Road is a series of trade and cultural transmission routes that were central to cultural interaction through regions of the Asian continent. It connected the West and East by linking traders, merchants, pilgrims, monks, soldiers, nomads, and urban dwellers from 第 36 頁 共 33 頁 China and India to the Mediterranean Sea during various periods of time. I met my dear hubby in 2021 the second year I was in my school and it was the first year when he came here. We became colleagues. And there was nothing special happening during that year. He was just a kind and humble brother graduated from the same college as me. But we did not know each other till he became my colleague and his office desk was just in front of me. There was only a glass between us. So actually we could see each other when we both look up. But it is not the main reason that really draws us close. How we bee close to each other was something seems quite natural. We went out to play badminton with other colleagues and we sometimes chatted for a while. He is a man of few words but somehow sometimes will say something really humorous. Then one day, to my great surprise, I found a pot of beautiful flower on my desk. It was just the flower I had talked about with my colleague the other day, and I thought it was her who put the flower there. But the truth is not. It was the humble guy sitting in front of me. He just simply said ,”well, I caught sight of this flower and thought that it’s beautiful and you may like it”. I wonder why I was moved because of these simple words and present. Maybe it is the sincerity and the true self that impress me. I thanked him and some colleagues walked past my desk would appreciate the beautiful flower and they noticed that something romance happened there. Then later on, there were some little surprises once in a while. Once, there was something wrong with my drawer and I had plained about it unconsciously. And he fixed it for me. Then the other day, he placed several pink diamond roses beside the flower with。具體 第 29 頁 共 33 頁 精度要求如圖 ，圖 所示： 圖 定模型芯固定板 第 30 頁 共 33 頁 圖 動模型芯固定板 第 31 頁