【正文】 2 injection mold cooling technology pulse cooling technology In recent years, the pulse cooling technology is gradually used in the production process of injection mold. Pulse cooling technology with the traditional cooling system there exist certain differences, the main is the cooling fluid flow of the injection mold for proper adjustment, adjust cooling fluid flow according to the temperature of the injection mold is how much of it can maximize the temperature of injection mold and die cooling fluid temperature difference of narrow, speed up the cooling time of injection mold, further enhance the efficiency of the production of plastic products. Pulse cooling technology, however, there are some shortings, mainly in the process of its application in operation there are multifarious, in order to keep the temperature of the injection mold balance, will increase the cooling technology in the middle of the pulse cooling technology distinction, and for each partition for cooling temperature detection. The CO2 gas cooling technology According to the conditions of application of the technology will mold production material replace with CO2 gas cooling technology to supporting the use of metal material, mold production in the process of CO2 gas injection, to reach the effect of cooling. CO2 gas cooling technology can enhance the efficiency of the production of plastic products, 黑龍江八一農(nóng)墾大學(xué)畢業(yè)論文（設(shè)計(jì)） 32 at the same time also can ensure the quality of its products, the cooling technology in the process of application need only will be closing the mold vent, pared with the traditional cooling technology of its operating structure is simple. However, CO 2 gas cooling technology in the process of practical application, its application range is small, use easily restricted. This is mainly due to two aspects, one is that if the application of CO2 gas cooling technology, the requirement for mold of metal, but its cost is higher, manufacturers not be monly use. Second, the application of CO2 gas cooling technology for technical talented person39。s life quality enhances unceasingly, for the quality of articles for daily use or style and so on various aspects demand increase gradually. At present, the plastic products are widely used in our daily life, with its novel appearance, easy to use, at the same time also includes reasonable price etc. Injection mold is one of the main methods of producing plastic products, the relevant technology of the cooling system is a central part of the injection mold, it decides the plastic product quality. 1 cooling system design and the quality of plastic products Cooling system technology the application of the plastic product quality has the key effect, in plastic injection molding process to ensure product mold under appropriate temperature. Mold temperature is too low, will influence the plastic molding products, product line deformation。要想取出塑料成品就要查看模具當(dāng)中的生產(chǎn)材料是否全部冷卻，冷卻不均勻極容易延長(zhǎng)塑料成品的冷卻時(shí)間，影響其生產(chǎn)效率，最終影響企業(yè)的經(jīng)濟(jì)效益。 CO2氣體冷卻技術(shù)能夠提高塑料產(chǎn)品的生產(chǎn)效率，同時(shí)還能夠保證其產(chǎn)品質(zhì)量，該冷卻技術(shù)在應(yīng)用的過(guò)程中只需要將模具的排氣孔予以關(guān)閉操作，與傳統(tǒng)的冷卻技術(shù)相比其操作結(jié)構(gòu)簡(jiǎn)便。 塑料尺寸大小的影響 塑料被分為很多種，其中比較常見(jiàn)的是結(jié)晶型塑料和另外一種軟質(zhì)形塑料。文章主要從注塑模具的冷卻系統(tǒng)相關(guān)技術(shù)進(jìn)行闡述分析， 為注塑模具的產(chǎn)品開(kāi)發(fā)以及技術(shù)應(yīng)用提供參考。 她 嚴(yán)謹(jǐn)細(xì)致、一絲不茍的作風(fēng)一直是我工作、學(xué)習(xí)中的榜樣； 她 循循善誘的教導(dǎo)和不拘一 格的思路給予我無(wú)盡的啟迪。通過(guò)顏色的對(duì)比，可以為設(shè)定注塑時(shí)間提供借鑒作用。 Moldflow 可以幫助在最終設(shè)計(jì)決策前試驗(yàn)假定方案、 材料及工藝參數(shù)設(shè)置 ，還以優(yōu)化設(shè)計(jì)方案，提供最優(yōu)的設(shè)計(jì) 。 試模 模具安裝調(diào)整后即可以進(jìn)行試模。 （ 3）當(dāng)模具長(zhǎng)寬度尺寸相差較大 時(shí) ， 要讓 較 長(zhǎng) 的 邊和水平方向平行 。 模具與注塑機(jī)安裝尺寸校核 （ 1） 模具長(zhǎng)寬尺寸與注塑機(jī)模板尺寸和拉桿間距 校核 ： 模具長(zhǎng)寬＜拉桿面積 模具長(zhǎng)寬為 300mm 250mm＜注塑機(jī)拉桿間距 368mm 290mm 故滿足要 求。 （ 1） Φ + → Φ + 黑龍江八一農(nóng)墾大學(xué)畢業(yè)論文（設(shè)計(jì)） 16 0 0 0101]%)[(])1[()(?????????????? zz xLSL ss ?? （ 2） Φ 10+ → Φ 10+ 000202]%)[(])1[()(??????????????zzxLSL ss ?? 型芯高度尺寸 模具最大磨損量取塑件公差的 1 / 6；模具的制造公差 δ z = Δ /3；取 x=。 （ 3） 模具的磨損量 實(shí)踐證明，對(duì)于一般的中小型塑件 ， 最大磨損量可取塑件公差的 取 6? 以下。 型腔的冷卻是 在定模板（中間板）上的開(kāi) 兩條 Φ10mm的冷卻水道 ， 來(lái)對(duì)型腔進(jìn)行冷卻，定模板冷卻水道 如圖 31 所示。 ； θ 2—— 冷卻水入口處溫度， C176。即在注塑完成后通循環(huán)冷 卻 水到靠近型腔的零件上或型腔零件上的孔內(nèi)， 加速模具溫度下降，減少塑件成型時(shí)間，提高生產(chǎn)效率 。 2） 導(dǎo)向作用 合模時(shí)引導(dǎo)動(dòng)模按序正確 開(kāi)啟、閉合，防止 凹、凸模 發(fā)生碰撞 。 經(jīng)計(jì)算斜導(dǎo)柱的長(zhǎng)度為 75mm。α應(yīng)小于 25176。 型芯結(jié)構(gòu) 見(jiàn)裝配圖所示， 型芯固定在動(dòng)模板 14 上，型芯和推件板 16 結(jié)合處 采用錐面，來(lái)保證緊密配合，而且， 有助于減少推件板與型芯的摩擦。 側(cè)向抽芯機(jī)構(gòu) 塑件的側(cè)面有 一個(gè) Φ 10mm 的圓孔， 考慮到需要側(cè)向抽芯，為此模具應(yīng)設(shè)有 側(cè)向抽芯機(jī)構(gòu) 。圖 22（ a） 的分型面選擇在軸線上， 這種方案生產(chǎn)的塑件表面會(huì)有痕跡，降低產(chǎn)品精度，側(cè)向抽芯難 ；圖 22（ b）的分型面選擇在下端面， 這種方案的塑件 外表面可以在整體凹模型腔內(nèi)成型，塑件大部分外表面光 整 ， 精度高，會(huì) 在側(cè)向抽芯處留有分型面痕跡 ， 而且塑件 容易 脫模 。 圖 21 型腔布置 確定分型面 分型面位置選擇的總體原 則 ： a) 分型面應(yīng)選在塑件外形最大輪廓處。； 模具溫度 50C176。預(yù)熱時(shí)間 2 ～ 3 h ； 料筒溫度 前段 200C176。 其 綜合性能較好， 耐低溫、抗沖擊性、力學(xué)強(qiáng)度較高，尺寸穩(wěn)定，耐化學(xué)性 ；易于成形和機(jī)械加工，與有機(jī)玻璃的熔接性良好，可作雙色成形塑件，且表面可鍍鉻。 文中 詳細(xì)分析了 注塑 模具的設(shè)計(jì)過(guò)程， 設(shè)計(jì)步驟包括：閱讀零件圖，工藝分析，確定模具結(jié)構(gòu)，結(jié)構(gòu)設(shè)計(jì)計(jì)算，畫(huà)裝配圖， 參數(shù) 校驗(yàn) ；內(nèi)容包括模具結(jié)構(gòu)形式的確定、注塑機(jī)類型的選擇、澆注系統(tǒng)的設(shè)計(jì)、導(dǎo)向與定位機(jī)構(gòu)的設(shè)計(jì)、冷卻水道的設(shè)計(jì)及成型尺寸的計(jì)算等。 including the mold structure determination of the injection molding machine type selection , gating system design, designoriented and positioning mechanism, and the design and calculation of cooling channels molded dimensions and the like. Finally, by Moldflow simulation software for plastic parts best gate location, filling time, welding marks distributed, cavitation pressure distribution analysis, forecasting product that may occur during the injection molding problems. Key words: Injection mold； protective cover； double parting surface III 目 錄 摘 要 .............................................................................................................................. I Abstract ........................................................................................................................ II