【正文】 his essay, the venerable Emerson talks about eschewing the trappings of society and finding one39。 [10] 蔣繼宏 .注 射模具典型結(jié)構(gòu) 100例 .北京：中國(guó)輕工業(yè)出版社， 2021 [11] 申開(kāi)智 .塑料成型模具（第二版） .北京：中國(guó)輕工業(yè)出版社， 2021 [12] 王忠銀 .型腔模具結(jié)構(gòu)圖冊(cè) .長(zhǎng)沙：湖南科學(xué)技術(shù)出版社， 1988 [13] 許發(fā)樾 .模具標(biāo)準(zhǔn)應(yīng)用手冊(cè) .北京：機(jī)械工業(yè)出版社， 1994 [14] 馮炳堯 .模具設(shè)計(jì)與制造簡(jiǎn)明手冊(cè) .上海：上海科技出版社， 1985 ` 45 您好，為你提供優(yōu)秀的畢業(yè)論文參考資料，請(qǐng)您刪除以下內(nèi)容， O(∩ _∩ )O 謝謝?。?！ A large group of tea merchants on camels and horses from Northwest China39。當(dāng)開(kāi)模完全后，動(dòng)模停在遠(yuǎn)處不動(dòng)，注塑機(jī)推桿推動(dòng)頂針板往左走，頂針板及頂針固定板帶動(dòng)頂針往左頂出塑件產(chǎn)品，隨后塑件及凝料自動(dòng)脫落，澆口部分自動(dòng)斷開(kāi)。 ? 冷卻水在該溫度下的密度， 3mKg ? 冷卻水的流速， sm 。 （ 2）導(dǎo)套的端面應(yīng)倒圓角，導(dǎo)套孔最好做成通孔，有利于排出孔內(nèi)剩余空氣。 導(dǎo)向機(jī)構(gòu)的總體設(shè)計(jì) （ 1）導(dǎo)向零件應(yīng)合理地均勻分布在模具的周?chē)蚩拷吘壍牟课?，其中心至模具邊緣?yīng)有足夠的距離，以保證模具的強(qiáng)度，防止壓入導(dǎo)柱和導(dǎo)套后變形。 模具成形零件的制造公差，它直接影響塑件的尺寸公差，成形零件的精度高，則塑件的精度也高。直徑為 ，在 ABS 塑料的設(shè)計(jì)推薦用的直徑范圍之內(nèi) ~ 之內(nèi)。對(duì)于拔模斜度小或塑件精度要求較高時(shí)，為了便于脫模，可將分型面選在塑件中間的部位，但此塑件外形有分型的痕跡。本模具采用的型號(hào)為 CI2940A69B83C90(GB/T125562021)的標(biāo)準(zhǔn)模架，模具的外形尺寸為 400mm 350mm，模具閉合高度 H=292mm. 查資料知 XS— ZY250型注射機(jī)拉桿空間尺寸為 448mm 370mm,即動(dòng)、定模模板最大安裝尺寸為 448mm 370mm，允許模具的最小厚度 Hmin=200mm,最大厚度 Hmax=350mm，模具最大厚度和最小厚度是指注射機(jī)移動(dòng)模板閉合后達(dá)到規(guī)定鎖模力時(shí)，移動(dòng)模板與固定模板之間所達(dá)到的最大和最小距離，這兩者之差就是調(diào)模機(jī)構(gòu)的調(diào)模行程，即模具的外形尺寸不超過(guò) 注射機(jī)動(dòng)、定模模板最大安裝尺寸，由附件總裝圖測(cè)量知該模具閉合高度度 H=292mm 滿足 Hmin≤ H≤ Hmax 的安裝條件，故該模具滿足 XS— ZY250 型螺桿式注射機(jī)的安裝要求。根據(jù)以上計(jì)算一次注射量的分析以及考慮到塑件品種、塑件結(jié)構(gòu)、生產(chǎn)批量及注射工藝參數(shù)、注射模具尺寸大小等因素，由以上數(shù)據(jù)計(jì)算數(shù)據(jù)知，該模具一次注塑所需 塑料，該模具的整體尺寸為400x350x292mm(LxHx 厚度 )參考設(shè)計(jì)手冊(cè)初步選定型號(hào)為 XS— ZY250 型臥式螺桿注射機(jī)的主要技術(shù)參數(shù)，見(jiàn)下表： [6] XS— ZY250型螺桿式注射機(jī)的主要技術(shù)參數(shù) 序號(hào) 主要技術(shù)參數(shù)項(xiàng)目 參數(shù)數(shù)值 1 最大注射量 /cm179。為了容易脫模，還要防止塑件表面在脫模時(shí)刮傷和擦毛，在設(shè)計(jì)的時(shí)候塑件表面沿脫模方向一般具有合理的脫模斜度。另外，模具對(duì)塑料制品的成本也有相當(dāng)?shù)挠绊憽? 31 第七章 脫模頂出機(jī)構(gòu)的設(shè)計(jì) 全面要求是：能生產(chǎn)出在尺寸精度、外觀、物理性能等方面均能滿足使用要求的優(yōu)質(zhì)制品。該制品的精度和表面粗糙度的要求很高 , 為比較規(guī)則的薄壁件，只是在塑件尾部有一段曲面，制件表面有三個(gè)通孔，制件的前端中間內(nèi)部?jī)蓚?cè)各有裝配手機(jī)座的圓銷狀卡位，所以在模具設(shè)計(jì)和制造上要有精確的定位措施和良好的加工工藝以保證塑件精度。 11 圖 5 .整體式型腔結(jié)構(gòu)圖及二維圖 模架的選擇 12 由前面型腔的布局以及相互的位置尺寸，再根據(jù)成型零件尺寸結(jié)合標(biāo)準(zhǔn)模架，選用CI2940A69B83C90(GB/T125562021)此種較合適的標(biāo)準(zhǔn)模架，其基本結(jié)構(gòu)如圖 6 所示 ，模架的各模板尺寸見(jiàn)表 2。 式中左邊 =130*（ 2*+） =1800KN 符合要求。 （ 2） 考慮塑件的外觀，使得分型面產(chǎn)生的飛邊易于清除且不影響塑件的外觀。內(nèi)壁粗糙度在 Ra≈ m。 澆口的尺寸 設(shè)計(jì)澆口時(shí)，厚度應(yīng)盡量小 h=～ （不能大于塑件壁厚的 1/2），長(zhǎng)度 L=～，寬度需要根據(jù)具體的情 況去確定，但是澆口的總截面積不能大于主流道的截面積。 ? ? zzz z xLSL sm ???? 2/1 2/12/1 2/1 )1()( ???? ???? IT7 177。 （ 4）導(dǎo)柱的安裝形式，導(dǎo)柱固定部分與模板按 H7/k6 的過(guò)渡配合，導(dǎo)柱滑動(dòng)部分按 H7/g7或 H8/g7 的間隙配合。 由于塑件的材料工藝性能好，而且塑件不易變形，所以采用推桿推出機(jī)構(gòu)即可。假 如塑料樹(shù)脂在模內(nèi)釋放的熱量全部由冷卻水傳導(dǎo)的話，即忽略其他傳熱因素，那么模具所需的冷卻水體積流量則可用下式計(jì)算 [14] ? ? ? ? m i 33 521 mc Mqq V ?????? ????? ??? 式（ ） 式中 vq 冷卻水體積流量， min3m 。 [3] 齊衛(wèi)東 .塑料模具設(shè)計(jì)與制造齊衛(wèi)東 .北京：高等教育出版社， 2021。s Poly Theater. Their show, titled Ulan Muqir on the Grassland, depicted the history and development of the art troupe. Being from the region allowed me to embrace the culture of Inner Mongolia and being a member of the troupe showed me where I belonged, Nasun, the art troupe39。s Liaoning province, decades ago. The solider gave the old man a handmade saddle when they bid farewell. The story inspired Nasun to write Carved Saddle, a song that later became one of his most popular numbers. Now, every year, Nasun recruits young singers and dancers for the troupe. The troupe has also designed a new repertoire, which is mostly based on the daily lives of Mongolian people, especially the lives of nomadic families, and has bined contemporary musical elements with folk songs of the region. Haimu, a 25yearold khoomei (a local variant of overtone singing) singer, joined the troupe three years ago. Along with a sixmember band, he performs fast songs and soft ones that he writes－ all while playing the horsehead fiddle.Although I learned the piano since childhood and grew up listening to various kinds of music, to me, the folk music of Inner Mongolia is the root, he says. Performing in remote villages is pleasant. I feel at home on the b oundless grasslands, and the warm people there make me feel fulfilled. The first round of spring auction season in Beijing ended last week, but it failed to create much spring in the art market. Although two pieces of Chinese painting fetched more than 100 million yuan, the decline in trading volume and sale rate showed a downturn this year. In the ―Grand View: Chinese Painting Highlight‖ session at China Guardian 2021 spring auctions, Pan Tianshou’s representative work Eagle, Rock and Flora hit a record auction price of 279 million yuan, while Li Keran’s masterwork Jinggang Mountain fetched million yuan, an unexpected high in recent years. However, the trading volume fells to billion yuan from billion yuan in the same period the year before. The Huangchen 2021 Spring Auctions, which recorded million yuan in total sales, experienced the same. The section number went down to 5 from 12 pared to last year. According to expert Shao Jianwu, the art market did not attract much excitement this year due to the booming stock market and the persistent problems of fery and fake deals. The two pieces of Chinese painting notched up high price this spring due to their own value not due to a revival in the market. The successful transaction of two works with a hammer price of more than 100 million yuan once again confirms that valuable and rare works of high quality always earn the longlasting high price. Chinese painting and calligraphy is still the pillar of the market. However, the overall sales rate has dropped slightly, which reflects the demand for the ordinary auction goods has weakened,‖ said the president of China Guardian’s Hu Yanyan. Besides, the entry of new buyers also makes certain changes to the direction of purchasing. In a word, the overall market trend is very unpredictable. Although China Guardian 2021 Spring Auctions has achieved remarkable results, it does not mean that the market has walked out of the predicament. We still have to wait for the big economic boom to invigorate the art market.‖ Even so, the hot pursuit of some special items appeared this sprin