【正文】 型面為平面時(shí)一般采用圓形的截面流道，但考慮到加工的方便性，可采用半圓形的流道。側(cè)澆口的截面形狀為矩形，其優(yōu)點(diǎn)是截面形狀簡(jiǎn)單，易于加工，便于試模后修正。根據(jù)書上的經(jīng)驗(yàn)值取 4根，冷卻水口口徑為 8mm. 另外，冷卻系統(tǒng)的過(guò)程中，還應(yīng)同時(shí)遵循： （ 1）冷卻 水道應(yīng)盡量多，截面尺寸應(yīng)盡量大。作用面積盡可能大一些，以防止塑件變形和損壞。 5．合模時(shí)的正確復(fù)位。 因該模具為小型模具，且分型面適宜，可利用分型面排氣，所以無(wú)需設(shè)計(jì)排氣槽。塑件在注入型腔過(guò)程中會(huì)產(chǎn)生單向側(cè)壓力，或由于注射機(jī)的精度限制，使導(dǎo)柱工作中承受一不定的導(dǎo)向作用。 導(dǎo)柱、導(dǎo)套零件如下 圖 8 導(dǎo)柱 注射模設(shè)計(jì)說(shuō)明書 14 圖 9 導(dǎo)套 九、 模具中相關(guān)的校核 注射機(jī)與模具尺寸的關(guān)系校核 最大注射壓力的校核 開關(guān)旋轉(zhuǎn)蓋 的原料為 PVC，所需注射為 60100MPa，而所選注射機(jī)壓力為 2080 Kg/cm2，所以注射壓力符合要求。 （ 3） 模具與注塑機(jī)安裝部分相關(guān)尺寸校核 A 模具閉合高度長(zhǎng)寬尺寸要與注塑機(jī)模板尺寸和拉桿間距相合適 模具長(zhǎng)模具寬 拉桿面積 B模具閉合高度校核 Hmin———— 注塑機(jī)允許最小模厚 =125mm Hmax———— 注塑機(jī)允許最大模厚 =310mm H—————— 模具閉合高度 =305mm 故滿足 Hmax＞ H＞ Hmin。 故： S≥ 2 30+115+5 所以滿足壓機(jī)選用要求。頂針板 3 繼續(xù) 向前移動(dòng)，推出制件并在澆口處拉斷，主流道凝料在拉料桿 22 的作用下自動(dòng)脫落 ， 頂出塑料制品， 完成脫模過(guò)程。模具裝配過(guò)程是按照模具技術(shù)要求和相互間的關(guān)系，將合格的零件連接固定為組件、部件直至裝配為合格的模具。 澆口套與定模部分裝配后，必須與分模面有一定的間隙，其間隙為—— ，因?yàn)樵撎幨車娮靿毫Φ挠绊?，在注射時(shí)會(huì)發(fā)生變形，有時(shí)在試模中經(jīng)常發(fā)現(xiàn)在分模面上澆口套周圍出現(xiàn)塑料飛邊，就是由于沒(méi)有間隙的原因。裝配液壓系統(tǒng)時(shí)允許使用密封填料或密封膠，但應(yīng)防止進(jìn)入系統(tǒng)中； （ 7）試模：試模合格后打上模具標(biāo)記，包括模具編號(hào)、合模標(biāo)記及組裝基面。 ④ 注塑 在料筒中的塑料和模具達(dá)到預(yù)熱溫度時(shí)，就可以進(jìn)行試注塑，觀察注塑塑件的質(zhì)量缺陷，分析導(dǎo)致缺陷的原因，調(diào)整工藝參數(shù)和其他技術(shù)參數(shù)，直至達(dá)到最佳狀態(tài)。 最后檢查各種配件、附件待零件，保證模具裝備齊全，另外在裝配過(guò)程中應(yīng)嚴(yán)防零件在 裝配過(guò)程中磕、碰、劃傷和銹蝕。以免頂桿碰到型腔，損壞模具。軟件可直接調(diào)用數(shù)據(jù)庫(kù)中模架尺寸，金屬材料數(shù)據(jù)庫(kù)及加工參數(shù)，通過(guò)幾何造型及圖形變換可得到模板及模腔與型芯形狀尺寸迅速完成模具設(shè)計(jì)。 第一次進(jìn)行模具設(shè)計(jì)，得到了很多人的幫助和 指點(diǎn) ，非常感謝幫助我的人 ，由于本人設(shè)計(jì)水平有限，設(shè)計(jì)不合理的地方，望老師們批評(píng)指正！ 注射模設(shè)計(jì)說(shuō)明書 19 參考資料 1 實(shí)用注塑模設(shè)計(jì)手冊(cè) 2 塑料注塑模結(jié)構(gòu)與設(shè)計(jì) 3塑料模具技術(shù)手冊(cè) 4模具設(shè)計(jì)指導(dǎo) 5 塑料成型工藝與模具設(shè)計(jì) 請(qǐng)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 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 注射模設(shè)計(jì)說(shuō)明書 20 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! 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.