【正文】 位置，導(dǎo)柱中心至模具外緣至少應(yīng)有一個(gè)導(dǎo)柱直徑的厚度；導(dǎo)柱不應(yīng)設(shè)在矩形模模具四角的危險(xiǎn)斷面上，通常設(shè)在長(zhǎng)邊離中心線的1/3處最安全。 第7章 脫模機(jī)構(gòu)設(shè)計(jì) 確定推出機(jī)構(gòu)在注射成型的每一個(gè)循環(huán)中，都必須使塑件從模具型腔中或型芯上脫出，模具中這種脫出型件的機(jī)構(gòu)稱為推出機(jī)構(gòu)（或稱脫模機(jī)構(gòu)）。將塑件從包緊的型芯上脫出時(shí)所需克服的阻力稱為脫模力。 抽芯距和抽芯力的計(jì)算側(cè)向抽芯或側(cè)向瓣合模從成型位置到不妨礙制品頂出脫摸位置所移動(dòng)的距離稱為抽芯距，用S抽表示，為了安全起見(jiàn)，抽拔距通常應(yīng)比側(cè)孔或側(cè)凹的深度大23mm。 斜導(dǎo)柱的設(shè)計(jì)斜角與脫模力及抽芯有關(guān)，角度大則斜導(dǎo)柱所受彎曲力要增大，所需開(kāi)模力也增大。1． 開(kāi)模時(shí)，滑塊和鎖緊塊必須分開(kāi)，之后斜導(dǎo)柱才能拔動(dòng)滑塊實(shí)現(xiàn)側(cè)向抽芯；2． 合模時(shí)，如果滑塊由斜導(dǎo)柱復(fù)位，如果的話，鎖緊塊和滑塊就會(huì)發(fā)生干涉，稱撞模。 圖71 開(kāi)模行程和斜導(dǎo)柱的受力分析斜導(dǎo)柱的總長(zhǎng)度與抽芯距、斜導(dǎo)柱的直徑和傾角以及斜導(dǎo)柱固定板厚度等有關(guān)?；瑝K的結(jié)構(gòu)形狀可以根據(jù)具體制品和模具結(jié)構(gòu)靈活設(shè)計(jì)，既可與型芯做成一個(gè)整體，也可采用組合裝配結(jié)構(gòu)，整體式結(jié)構(gòu)多用于型芯較小和形狀簡(jiǎn)單的場(chǎng)合，而組合式結(jié)構(gòu)則市把型芯與滑塊分開(kāi)加工，然后裝配在一起，采用組合式結(jié)構(gòu)可以節(jié)省優(yōu)質(zhì)剛材（型芯用鋼一般比滑塊用鋼要求高），并使加工變得比較容易。而保留在滑槽內(nèi)的長(zhǎng)度不應(yīng)小于這個(gè)數(shù)值的2/3，否則，滑塊開(kāi)始復(fù)位時(shí)容易偏斜，甚至損壞模具。3　 滑塊的導(dǎo)滑形式 為了確保側(cè)型芯可靠的抽出和復(fù)位，保證滑塊在移動(dòng)過(guò)程中平穩(wěn)上下竄動(dòng)和卡死現(xiàn)象，滑塊與導(dǎo)滑槽必須很好配合和導(dǎo)滑。為此，滑塊需有靈活，可靠，安全的定位裝置。圖74(e)是對(duì)楔緊塊起加強(qiáng)作用的形式，適用于抽芯距較短而需楔緊力大的場(chǎng)合。本次設(shè)計(jì)圓滿完成了塑料制品三通管的注塑模具的設(shè)計(jì)。確定主要成型零件、結(jié)構(gòu)件的結(jié)構(gòu)形式，計(jì)算成型零件的工作尺寸。針對(duì)三通管的具體結(jié)構(gòu)，該模具是點(diǎn)澆口的雙分型面注射模具。此外，設(shè)計(jì)工作是一項(xiàng)繁重的工作，必須具有嚴(yán)謹(jǐn)細(xì)致的工作作風(fēng)和頑強(qiáng)的決心和毅力。80s. We sat on the back of pickup trucks for hours. The sky was blue, and we couldn39。s performers of the troupe still tour the region39。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 boundless 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 2015 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 2015 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 forgery 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 2015 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 spring. A special session of China Guardian Spring Auctions titled “Fine Gilt—Bronze Buddhist Images” achieved a great deal with total sales volume of million yuan and 92 percent sale rate. The 5th Shamar Rinpoche Statue from 1617th century of Tibet was sold for million yuan. The Beijing Chengxuan Auctions featured almost 2,800 items of coins and stamps in three sessions with good sale rate. The Huachen Auctions also set a special session of photographs under the condition of largescale decline of auction sessions. There was a palpable dull thud of disappointment that acpanied the return of the imperial entourage of Zhen Huan to her homeland. It followed a couple years of hushed excitement as Chinese fans were fed tidbits about their proud concubine who was supposed to conquer the high ground of the North American market. Zhen Huan is, of course, the title character of The Legend of Zhen Huan, a 2011 television series that swept China off its feet and later took other Asian countries by storm. Two years ago, it was reported that HBO, a premium cable service headquartered in the United States, was going to air it in North America after some modification. Now, a condensed version that provides English subtitles but no dubbing has finally been made available on Netflix for online streaming. This version, highly anticipated as a milestone in China39。s essay titled SelfReliance. If you39。s lost, I believe, are the interesting setups and pauses that illuminate the Chinese art of storytelling. Much of the plot is still there. It is the flavor that was sacrificed. The American edition uses the framework of the Empress Dowager in her senior years reminiscing at the beginning and the end of each episode, hinting at what39。s Poly Theater. Their show, titled Ulan Muqir on the Grassland, depicted the history and development of the art trou