【正文】 所需的注射壓力 P。 PP的成型注射壓力為 130MPa。 所以 注射壓力一般塑件的成型注射壓力為 130MPa。 鎖模力的校核 鎖模力的大小主要取決于注射壓力和施壓方向垂直的制品投影面積，三者必 17 須符合下列的關(guān)系才達到鎖模的目的。 所以 3 3 310 130 64 64 10 8 10F X KpA KN? ? ? ? ? ? ? ? ? ? 初步選定的兩臺 注射機的 最大 鎖模力 分別 為 5000KN，和 8000KN， 故SZ— 40000/800 型號的 注射 機 滿足要求 。 開模行程需要滿足： S=500+5680+7=1067mm, 初步選定 中 的 SZ— 2500/500 注 射機的最大開模行程為 850mm1067mm,所以該型號的注射機不能滿足要求，而 SZ— 40000/800型號的注射機最大開模行程為1200mm1067mm,所以滿足要求。保壓力可 稍低于注射壓力，取保壓壓力為 50MPa。 (3)冷卻時間設(shè)計為 30s。 注射機的確定 根據(jù) 注射壓力，鎖模力以及 開模行程的 校核 ，最終確定選取注射機的型號為 ：SZ— 4000/800。 （ 2） 能耗的價格 機器的功率為 20KWh ，如果每天 24小時不間斷生產(chǎn)，電價為 KWh ,每天消耗電價為： 1Y =20 24 =720 元 （ 3）工資 按每人 1400 元一月，一臺機需 3 人操作，每天工資為： 2Y =1400 3247。 10247。 20 第十一章 課程設(shè)計總結(jié) 塑料方凳 的設(shè)計 選用的 基體樹脂 是聚丙烯，并通過加入助劑來使得塑料等達到預(yù)期的效果， 改善聚丙烯的力學(xué)性能，并且可以降低成本， 選用注射成型的方式來生產(chǎn)方凳，選用的注射機型號為 SZ— 4000/800，并確定在注射時得各個工藝參數(shù)。 在設(shè)計 的最后進行了成本和利潤的估算，可達到日利潤 元。 22 請您刪除一下內(nèi)容， O(∩ _∩ )O謝謝?。?！ Many people have the same mixed feelings when planning a trip during Golden Week. With heaps of time, the sevenday Chinese National Day holiday could be the best occasion to enjoy a destination. However, it can also be the easiest way to ruin how you feel about a place and you may bee more fatigued after the holiday, due to battling the large crowds. During peak season, a dream about a place can turn to nightmare without careful planning, especially if you travel with children and older people. As most Chinese people will take the holiday to visit domestic tourist destinations, crowds and busy traffic are inevitable at most places. Also to be expected are increasing transport and acmodation prices, with the possibility that there will be no rooms available. It is also mon that you39。s largest virgin forest, and known for its spring and ecological environment, Arxan is marveled at by many tourists as the purest land on earth. You cannot miss out the Autumn of Arxan. It is definitely the best with brightlycolored scenery full of emotions. Autumn in the northern part of the country es earlier than the South. A September rain followed by the footprints of Autumn brings more colors to the once emerald green mountain and blooming grassland. Shutterbugs flock to see for themselves the marvel of splendid colors around the mountains and waters, many of whom have travel a long distance and even camp here only to capture a moment of the nature wonder. The silver birch turns golden, while the larch is still proudly green. You will find yourself drowned in the intoxicating red of the wild fruits as well as the glamour of flowers in full blown. And your heart will be lingering on the woods as it39。s misery, the cow told him to turn its hide into a pair of shoes after it died. The magic shoes whisked Niulang, who carried his two children in baskets strung from a shoulder pole, off on a chase after the empress. The pursuit enraged the empress, who took her hairpin and slashed it across the sky creating the Milky Way which separated husband from wife. But all was not lost as magpies, moved by their love and devotion, formed a bridge across the Milky Way to reunite the family. Even the Jade Emperor was touched, and allowed Niulang and Zhinu to meet once a year on the seventh night of the seventh month. This is how Qixi came to be. The festival can be traced back to the Han Dynasty (206 BCAD 220). Traditionally, people would look up at the sky and find a bright star in the constellation Aquila as well as the star Vega, which are identified as Niulang and Zhinu. The two stars shine on opposite sides of the Milky Way. Customs In bygone days, Qixi was not only a special day for lovers, but also for girls. It is also known as the Begging for Skills Festival or Daughters39。s Day on February 14, characterized by bouquets of roses, chocolates and romantic candlelight dinners, than they do about their homegrown day for lovers. Even Qixi is nowadays referred to as the Chinese Valentine39。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. 23