【正文】 機(jī)構(gòu)雖然結(jié)構(gòu)比較復(fù)雜，但分型與抽芯無(wú)需手工操作，生產(chǎn)率高。 斜導(dǎo)柱的傾斜角又取 150即可滿足要求，由此可得抽芯力 Fc，查《塑料成型工藝與模具設(shè)計(jì)》式 559 可得， C 周長(zhǎng) =2π R= mm= m 側(cè)抽芯高度 h=12 mm = m 包緊力 k= 107pa u= FC= 107( cos20○ sin20○ ) 南昌理工學(xué)院模具設(shè)計(jì)與制造專(zhuān)業(yè)畢業(yè)論文 第 16 頁(yè) 共 23 頁(yè) = 根據(jù)斜導(dǎo)柱傾斜角又和抽芯力 Fc 的取值，查《塑料成型工藝與模具設(shè)計(jì)》表 520 得最大斜曲力 Fw= 由本塑件的外形可知與抽芯矩 S 對(duì)應(yīng)的開(kāi)橫距 H 正好與側(cè)型芯的長(zhǎng)度相等為 36mm，而 Hw=(1/2)H=18mm，由以上關(guān)系，再查《塑料成型工藝與模具設(shè)計(jì)》表 521 得斜導(dǎo)柱的直徑 d 為 10mm。 冷卻系統(tǒng)的設(shè)計(jì)原則如下： （ 1）冷卻水道應(yīng)盡量多，截面尺寸應(yīng)盡量大 （ 2）冷卻水道至型腔表面距離慶盡量相符 （ 3）澆口處加強(qiáng)冷卻 （ 4）冷卻水道出，入口溫差應(yīng)盡量小 （ 5）冷卻水道應(yīng)沿著塑料收縮的方向設(shè)置 此外，冷卻水道的設(shè)計(jì) 還必須盡量避免接近塑件的熔接部位，以免產(chǎn)生深接痕，降低塑件強(qiáng)度，冷卻水道要易于加工清理，一般水道孔徑為 10mm左右（不小于 8mm）；冷卻水道的設(shè)計(jì)要防止冷卻水的泄漏，凡是易漏的部位要加密封圈等等。 南昌理工學(xué)院模具設(shè)計(jì)與制造專(zhuān)業(yè)畢業(yè)論文 第 18 頁(yè) 共 23 頁(yè) 確定排氣槽形狀、尺寸 當(dāng)塑料熔體填充型腔時(shí)，必須順序排出型腔及澆注系統(tǒng)內(nèi)的空氣及塑料受熱或凝固產(chǎn)生的低分子揮發(fā)氣體。 鎖模力的校核 注射成型時(shí)，模具所需的鎖模力與塑 件在水平分型面上的投影面積有關(guān)，為了可靠地鎖模，不使成型過(guò)程中出現(xiàn)溢料現(xiàn)象，應(yīng)使塑料熔體對(duì)型腔的成型壓力與塑件和澆注系統(tǒng)在分型面上的投影面積之和的乘積小于注射機(jī)額定鎖模力，即： （ nA1+A2） P＜ F n—— 型腔數(shù)量； A1—— 單個(gè)塑件在模具分型面上的投影面積（ mm2）； A2—— 澆注系統(tǒng)在模具分型面上的投影面積（ mm2）； P—— 塑料熔體對(duì)型腔的成型壓力（ MPa）其大小一般是注射壓力的80%； F—— 注射機(jī)的額定鎖模力。 開(kāi)模行程的校核 參 考《塑料成型工藝與模具設(shè)計(jì)》圖 417，式 414 并結(jié)合本模具的特點(diǎn)，可確定開(kāi)模行程為 H1=37mm H2=40+50=90 mm S=H1+H2+（ 5～ 10） +（ +8） =30+90+10 =137mm 而所選注射機(jī)的開(kāi)模行程為 300mm，因此所設(shè)計(jì)的開(kāi)模行程符合要求。 南昌理工學(xué)院模具設(shè)計(jì)與制造專(zhuān)業(yè)畢業(yè)論文 第 22 頁(yè) 共 23 頁(yè) 參考文獻(xiàn) 《塑料成型模具》，主編申開(kāi)智、葉淑靜，北京：輕工業(yè)業(yè)出版社，1982 《塑料成型工藝與模具設(shè)計(jì)》，主編屈華昌，北京：機(jī)械工業(yè)出版社會(huì)， 2021 《塑料成型工藝學(xué)》，主編張承琦，北京：輕工業(yè)出版社， 1983 《互換性與技術(shù)測(cè)量》，主編韓進(jìn)宏，北京：機(jī)械工業(yè)出版社， 2021 《機(jī)械制圖》，主 編郭紀(jì)林、余桂英，北京：清華大學(xué)出版社， 2021 《塑料模設(shè)計(jì)手冊(cè)》，手冊(cè)編寫(xiě)組編著，北京：機(jī)械工業(yè)出版社，1982 《塑料模具設(shè)計(jì)》，主編李秦蕊，西安：西北工業(yè)大學(xué)出版社， 1988 g an employment tribunal claim Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, 南昌理工學(xué)院模具設(shè)計(jì)與制造專(zhuān)業(yè)畢業(yè)論文 第 23 頁(yè) 共 23 頁(yè) at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。二十年的人生軌跡深深淺淺，突然就感覺(jué)到有些事情，非做不可了。 Then in high school, think don39。 A person39。嫌惡過(guò)自己的怯懦，最終卻發(fā)現(xiàn)有很多 緣分 ，有很多錯(cuò)過(guò)，好像冥冥之中真的已經(jīng)注定。 From the corner at the beginning of deep friendship。 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. The supersonic descent could happen as early as Sunda. The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still,