【正文】 是使動模支承板與動模座板之間形成用于推出機(jī)構(gòu)運(yùn)動空間和調(diào)節(jié)模具總高度以適應(yīng)成型設(shè)備上模具安裝空間對模具總高的要求。 零件名稱 材料牌號 熱處理方法 硬度 型腔、型芯 Cr12 淬火 HRC54～ 58 塑料圓盒模具設(shè)計 28 墊板（支承板） 45 鋼 淬火 HRC43～ 48 動模板 45 調(diào)質(zhì) HB230～ 270 定模板 45 調(diào)質(zhì) HB230～ 270 動定模座板 45 調(diào)質(zhì) HB230～ 270 固定板 45 調(diào)質(zhì) HB230～ 270 頂板 T10A、 T8A 淬火 HRC54～ 58 澆口套 T10A、 T8A 淬火 HRC50～ 55 導(dǎo)柱 20 滲碳淬火 HRC50～ 55 導(dǎo)套 T10A、 T8A 淬火 HRC50～ 55 斜導(dǎo)柱 T10A、 T8A 淬火 HRC54～ 58 鎖緊塊 T10A、 T8A 淬火 HRC54～ 58 頂桿 T10A、 T8A 淬火 HRC54～ 58 復(fù)位桿 T10A、 45 淬火 HRC54～ 58 墊塊 Q23 45 鍛壓 退火或調(diào)質(zhì) HB123～ 235 噴嘴 4 A3 塑件的原料為 PP，所需注射為 4080MPa，而所選注射機(jī)壓力為 130MPa。 脫模力的計算 該制件為圓環(huán)形截面，脫模力計算公式為 122 ( ta n ) 0 .1(1 )rE S L fFAKK??? ????? 式中 r—— 型芯平均半徑 r=62mm K2—— 無量綱系數(shù)，其值隨 f和 φ 而異，查表得， K2= K1—— 無量綱系數(shù)，其值隨λ和 φ 而異，查表得， K1= S—— 塑料平均成型收縮率 S=2% E—— 塑料的彈性模量， MPa，查表得 E=1500MPa L—— 塑件對型芯的包容長度， mm， L= 塑料圓盒模具設(shè)計 30 f—— 塑件與型芯之間的摩擦因數(shù)， f= φ —— 模具型芯的脫模斜度， φ =1176。適當(dāng)降低模具溫度，有利于縮短冷卻時間，提高生產(chǎn)效率，提高生產(chǎn)效率。冷卻管道的直徑與間距直接影響模溫分布。 塑料 熔體在填充型腔的過程中 ，一般在澆口附近溫度最高，因而應(yīng)加強(qiáng)澆口附近的冷卻。故設(shè)計冷卻水道為環(huán)型腔的形似。 （ 4） 慢速開啟模板直到模板停止后退為止，調(diào)節(jié)頂出裝置，保證頂出距離。 雖然是在選定成型材料、成型設(shè)備時，在預(yù)想的工藝條件下進(jìn)行模 具設(shè)計，但是人們的認(rèn)識往往是不完善的，因此必須在模具加工完成以后，進(jìn)行試模試驗，看成型的制件質(zhì)量如何。因為成型條件容易改變，所以一般的做法是先變更成型條件，當(dāng)變更成型條件不能解決問題時，才考慮修理模具。 塑料圓盒模具設(shè)計 33 總結(jié) 經(jīng)過一個多月的時間，本人已完成本次畢業(yè)設(shè)計任務(wù)書要求做的主要內(nèi)容和要求，有圓盒注射模的模具結(jié)構(gòu)和工藝設(shè)計。通過這次設(shè)計，使我對模具設(shè)計，以及計算機(jī)輔助設(shè)計建模有了進(jìn)一步了解，進(jìn)一步提高了自己對模具設(shè)計的能力，為我以后的工作和發(fā)展打下了一定的基礎(chǔ)，同時使我認(rèn)清了自己的能力和缺陷，為我走向社會奠定了堅實的基礎(chǔ)。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 sa le 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 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 2021 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 modificati