畢業(yè)論文 微型液壓臥式螺桿注塑機系統(tǒng)設(shè)計

目  錄

摘要　…………………………………………………………………………………………　Ⅰ
Abstract ………………………………………………………………………………………  Ⅱ
第一章  前 言 ………………………………………………………………………………  1
  1.1微型注塑機發(fā)展現(xiàn)狀及趨勢 …………………………………………………………  1
  1.2 本課題研究目的及意義 ……………………………………………………………… 1
 第二章 注塑機的概況 ……………………………………………………………………… 3
  2.1 注塑機的組成 ………………………………………………………………………… 3
  2.2 注射機生產(chǎn)工作過程 ………………………………………………………………… 4
  2.3 注射機的分類 ………………………………………………………………………… 4
第三章 注射裝置設(shè)計 ………………………………………………………………………  7
  3.1 注射裝置類型 ………………………………………………………………………… 7
  3.2 注射裝置對比選擇 …………………………………………………………………… 8
  3.3 螺桿對比選擇 ………………………………………………………………………… 8
  3.4 螺桿設(shè)計計算 ………………………………………………………………………… 9
  3.5 螺桿頭選型設(shè)計 ……………………………………………………………………… 10
第四章 注射系統(tǒng)設(shè)計 ………………………………………………………………………  12
  4.1 料筒設(shè)計 ……………………………………………………………………………… 12
  4.2 噴嘴選型設(shè)計 ………………………………………………………………………… 13
第五章 合模系統(tǒng)設(shè)計 ………………………………………………………………………  14
  5.1 合模系統(tǒng)類型對比選擇 ……………………………………………………………… 15
第六章 液壓系統(tǒng)設(shè)計 ………………………………………………………………………  15
  6.1 傳動系統(tǒng)的種類和特點 ……………………………………………………………… 16
  6.2 液壓傳動 ……………………………………………………………………………… 16
  6.3 液壓系統(tǒng)原理設(shè)計 …………………………………………………………………… 18
  6.4 油泵類型的比較與選用 ……………………………………………………………… 20
  6.5 液壓系統(tǒng)有關(guān)計算 …………………………………………………………………… 24
第七章 模具設(shè)計 ……………………………………………………………………………  26
  7.1 塑料材料的分析 ……………………………………………………………………… 26
  7.2 擬定模具的結(jié)構(gòu)形式 ………………………………………………………………… 30
  7.3 澆注系統(tǒng)的設(shè)計 ……………………………………………………………………… 31
  7.4 成型零件的結(jié)構(gòu)及設(shè)計計算 ………………………………………………………… 33
  7.5 模架的確定 …………………………………………………………………………… 35
  7.6 其他機構(gòu)的設(shè)計 ……………………………………………………………………… 37
參考文獻 ……………………………………………………………………………………… 39
總結(jié)與展望 …………………………………………………………………………………… 40
致謝 …………………………………………………………………………………………… 41
 
微型液壓臥式螺桿注塑機系統(tǒng)設(shè)計

摘要: 臥式注塑機：這是最常見的類型。其合模部分和注射部分處于同一水平中心線上，且模具是沿水平方向打開的。其特點是：機身矮，易于操作和維修；機器重心低，安裝較平穩(wěn)；制品頂出后可利用重力作用自動落下，易于實現(xiàn)全自動操作。其缺點是：模具安裝比較麻煩，嵌件發(fā)表過如模具有傾斜或落下之可能，機床占地面積較大。目前，市場上的注塑機多采用此種型式。其工作原理如下：臥式注塑機是由料斗加入的塑料在螺桿的帶動下，沿螺旋槽向前輸送。由于外加熱圈的加熱和螺桿剪切摩擦生熱的作用，塑料變?yōu)檎沉鲬B(tài)，螺桿在轉(zhuǎn)動的同時后退。當(dāng)螺桿頭部積存的熔體壓力達到一定值時，螺桿接觸行程開關(guān)而停止轉(zhuǎn)動和后退，準(zhǔn)備下一階段的注射。注塑成型是一個循環(huán)的過程，每一周期主要包括：定量加料——熔融塑化——施壓注射——充模冷卻——啟模取件。取出塑件后又再閉模，進行下一個循環(huán)。注塑機的電能消耗主要表現(xiàn)在以下幾個部分：
①液壓系統(tǒng)油泵的電能消耗 ②加熱器的電能消耗 ③循環(huán)冷卻水泵的電能消耗（在注塑車間內(nèi)，一般多臺注塑機共用一臺冷卻水泵），其中液壓油泵電機的用電量占整個注塑機用電量的80%以上，所以降低其耗電量是注塑機節(jié)能的關(guān)鍵。

關(guān)鍵詞：微型臥式注塑機   螺桿  電能消耗 

   Miniature hydraulic horizontal screw injection molding 
          machine system design
              
Abstract： Horizontal injection molding machine: This is the most common type of. The clamping part and injection part is in the same horizontal center line, and the mold is opened along the horizontal direction. Its characteristics are: low fuselage, easy to operate and repair; machine low center of gravity, the installation is more stable; products after ejection can use gravity automatically fall, easy realization of full automatic operation. Its disadvantages are: die more troublesome installation, insert published as die with inclined or the fall of May, covers an area of large machine tool. At present, the market of the use of such type of injection molding machine. Its working principle is as follows: horizontal injection molding machine is composed of a hopper to join the plastic in the screw drive, along the spiral groove of forward conveyor. As a result of external heating coil heating and screw shear friction role, plastic to flow, screw while turning back. When the screw head of accumulated melt pressure reaches a certain value, the screw contact trip switch and stop the rotation and back, ready for the next stage of injection. Injection molding is a cycle, each cycle includes: quantitative feeding -- -- -- pressure melting and plasticizing injection mold filling cooling -- opening mould and parts. Remove plastic parts later again closed die, for the next cycle. Injection molding machine power consumption is mainly manifested in the following sections:Hydraulic system oil pump of the electric energy consumption of electric energy consumption of the heater and the cooling water circulating pump power consumption ( in injection molding workshop, the general number of injection molding machines to share one cooling water pump ), in which the hydraulic oil pump motor power consumption accounts for the injection molding machine with capacity of more than 80%, so reducing its power consumption is injection molding machine key.

Key word: Miniature horizontal injection molding machine    screw     Electric energy consumption