1、精選優質文檔-傾情為你奉上畢業設計論文）譯文及原稿畢業設計論文）開題報告含文獻綜述、外文翻譯）裝訂本插頁2-4做的。該配件成型后會縮0.95%。兩個塑料部件的提綱維度分別是124.26mm219.16mm78.6mm,和174.58mm221.67mm146.32mm。這兩個塑料部件的基本的壁厚是1.8毫M。而且，這個塑料部件的外觀要保持完美，澆注的標志，不允許出現在塑料部件表面上。注射的缺陷，如焊接線、沉馬克,、閃光、變色等，也不允許出現,兩個塑料部件的分隔表面制作起來是非常困難的，兩個塑料部件的分隔表面和復雜曲面具都有著凹凸不平的步驟的形狀。于是，就采用側澆扣，那里有2種構造在A和B的塑料

2、第一部分，在C的塑料第一部分的區域，其拔模角的角度為零，并且，在六個凹進去的結構里，C和D的塑料第一部分被限制。相應的抽芯機制設計應在5個地方。在F,H,G的塑料第二部分區域里，有三種構造，I和J的塑料第二部分在這三種構造里有六個凹進去的限制，在五個地方，相應的cor-pulling機制也應設計成一樣。然后十個抽芯機制將放置在一個模子。所以合理的設計機制并且注入模具是抽芯設計過程中最重要的環節。塑料第一部分塑料第二部分圖1。塑料部件二。斜導柱抽芯機構的設計根據塑料配件結構特的特點，6個斜導柱抽芯機機構被設計在A、B、C的塑料第一部分以及F、G和H的塑料的第二部分，這個機制是分布在圖2。如下：圖

3、2分布的斜導柱抽芯機構，以上是斜導柱抽芯機構1中在圖2中的顯示，例如,該機制的主要由滑塊1、斜導柱4、定位螺絲釘6，滑動楔板8、耐磨護板5和耐磨護板7組成，該機制如圖3所示。當模具打開的時候,斜頂柱被固定在固定的模具中間，引導下滑到模具的一半，運動沿著下滑道滑動，與其配對的斜面腔板能夠確保劈滑動作用，當模具關閉的時候。考慮到模具結構及工藝參數的問題,這個傾斜角的角度被定為13度，斜板的角度被定為15。因為滑動頻繁，在接觸的滑動部件就容易磨損。為了減少部件的磨損，于是采用了以下兩個步驟，首先，滑動部件是由718H和淬火50HRC做的。耐磨護板被放置在滑動部件的底部和后面，其次，耐磨護板是由GS2

4、510和60HRC組成，滑道是由滑動鍥板和鐵芯片組成，而且，滑道很容易機和維護。 圖3 頂針板抽芯機構1. 滑塊 2.固定件 3.壓塊. 4.斜導柱 5.耐磨護板 6.定位螺絲 7.耐磨護板8.滑動鍥板 9彈簧桿 三、彈射桿設計的角度抽芯機制四個斜頂桿抽芯機構被設計在D和E的塑料第一部分，I和J的塑料第二部分。這個機構被分布在圖4。如下：圖4斜頂桿抽芯機械的分布以在圖4顯示的斜頂桿抽芯機構1為例, 該機制的主要是由斜頂塊1、斜頂桿9、斜頂導向板4、斜頂導向板6、斜導柱5、斜頂滑動桿7和耐磨護板8組成的. 這個機制是顯示在圖5，如下：圖5斜頂桿抽芯機械1. 斜頂塊 2.直線導套 3.帶頭導套 4

5、.斜頂導塊 5斜導柱 6.斜頂導塊 7.斜頂板 8耐磨護板 9斜頂趕 10銷斜頂桿機構是由SUJ2制作的，SUJ2是一種由優質鋁合金材料，而且他的表面經過氮處理。斜頂桿的耐磨性能非常的好，通過分析和計算，斜導桿的傾斜角度是20，這樣的角度可以確保實現抽芯和的受力分布。斜頂導向塊是有鎳銅和被固定的鐵芯片組成，這類模具的維護是很容易的，其次，斜頂桿的精密度由斜頂導向塊來確保。斜頂桿機構被固定在斜頂塊上，這個斜頂塊是沿著面針板的滑動而移動的。當模具大塊的時候，斜頂桿隨著面針板移動，斜頂塊在側向提前隨著斜頂桿的移動而移動。就這樣，這個抽芯的目的得到了實現。如果執行失敗，斜頂桿受到面針板的推動，斜頂塊因

6、為斜頂桿而返回到起始位置的坐標。五、注塑模具的整體結構和工作過程模具結構如圖6。是一個模具的兩腔和側澆口的布局，10個抽芯機制如圖的的設計，是合理的，機構緊湊的。圖6如下：圖6.模具結構整個模具工作過程如下：融化塑料流入型腔模具通過澆注系統，在全部填充滿后，模具才打開。注射成型機的移動板塊因為杠桿原理一起向后移動，在模具的表面分段加工中模具被打開。塑料部件從模具的凹陷孔里被拿出，與塑料動模保持一致，斜導柱被插入到母模的導向板中，機構的抽芯步驟由塑料動模的6個滑動塊來完成。當模具打開的時候，必須要有一個固定的距離。塑料動模停止向后移動。注塑成型機的頂出桿向前移動，并且向頂出桿模具的頂針板前推，斜

7、頂桿。然后那個塑料件被擠出模具，并且在對噴射抽芯完成。注塑成型機的頂出桿只需要移動120毫M。當脫模器停止運動后，塑料零件就會被取出來。這樣，脫模這個動作就完成了，那時候，模具就被封閉起來。注塑成型機的頂出桿向后移動。因為回位銷和斜導柱的關系，模具部件將回到他們原來的位置。在模具封閉后，第二個工作周期就開始了。六、結論模具的結構是比較復雜的。10個抽芯機構被合理的設計在一個模具內及塑料部件脫模過程的實現。很多的鑲嵌件和標準零件被用于注塑模具。所以，注塑模具的經濟效率非常的好,而且注塑模具的維修比較的容易。注塑模具已經開始批量的生產，工業實踐證明，抽芯機構、彈射機制和復位機制的功能是相當的穩定和

8、可靠的。塑料部件已經可以滿足客戶各方面的技術要求答謝這個工作受到項目企業,大學和研究機構，廣東省教育部的大力支持和授權同意。參考。1奧斯汀c計算機輔助項目塑料注塑成型，應用計算機輔助項目塑料注塑成型M,紐約出版社1987年出版。2王K.K、Khullar王建民W .由電腦注塑模具的設計J。塑料項目,1981年1月1日(11:25-27。3史、柯正龍”,國立中山大學電機,問陸g。注塑工藝的優化和軟計算。智力。Adv.之日Manuf.Technol.2003。656-661。4,m. Turng Peic 。電腦輔助設計和優化過程中注入成型。IMechE。2002。于216:1523年。5。PBt

9、ch和W.Michaeli。“注塑成型。介紹”。艾德。Hanser,慕尼黑,19956D.M.Bryce。塑料注塑成型。生產工藝原理”。制造項目師學會。1996年,密西根州,Dearbonr授權許可484原文2009 International Conference on Industrial Mechatronics and Automation978-1-4244-3818-1/09/$25.00 2009 IEEE ICIMA 2009Application of Core-pulling Mechanism in Injection Mould DesignHuang Guijian1

10、, Li Xuemei2, 3, Wu Xiaoyu4, Li Jibin41. College of Mechatronics and Control Engineering, ShenzhenUniversity, Shenzhen, China, 2. Institute of Built Environment and Control, Zhongkai University of Agriculture and Engineering, Guangzhou, China3. School of Mechanical & Automotive Engineering, SouthChi

11、naUniversity of Technology, Guangzhou, China, 4 Shenzhen Key Laboratory of Advanced Mould Manufacturing Technology, ShenzhenUniversity, Shenzhen, China, Email: huang.AbstractIn this paper, the structural feature and formingtechnology of two automobile engine covers are analyzed. Themould structure w

12、ith two cavities is designed and the workingprocess of the injection mould is discussed. The mouldstructure is complicated. Ten core-pulling mechanisms aredesigned reasonably in one mould and demoulding of theplastic parts is realized. Many inserts and standard parts areused in the injection mould,

13、so the economical efficiency of theinjection mould is well and the injection mould can bemaintained conveniently. The injection mould is already inmass production. Industrial practice proves that the action ofthe core-pulling mechanisms, ejector mechanisms and resettingmechanisms is stable and relia

14、ble. The plastic parts producedcan meet the customers technical requirements.Keywords- injection mould。 core-pulling mechanism。 slide。demouldingI. INTRODUCTIONTwo automobile engine covers are shown in figure 1.The plastic parts are in mass production and the two plasticparts are asked to be moulded

15、in one mould. The plastic partsare made of polypropylene (PP. The molding shrinkage is0.95%. The outline dimensions of two plastic parts are124.26mm219.16mm78.6mm and174.58mm221.67mm146.32mm. The basic wall thicknessof the two plastic parts is 1.8mm. The appearance of theplastic parts should maintai

16、n perfect. The mark of pouringand ejecting is not allowable to appear on the plastic part.The disfigurement of injection such as weld lines, sink mark,flashing, splay, etc. is not allowable to appear either. Designof the parting surface of the two plastic parts is difficult. Theparting surface is co

17、mplicated curved surface and it hasuneven step shape. The side gate is adopted. There are tworeentrant structures in the area of A and B of the plastic part1, the draft angle is zero in the area of C of the plastic part 1and there are six reentrant structures within the limit of Dand E of the plasti

18、c part 1. The corresponding core-pullingmechanisms should be designed in the five places. There arethree reentrant structures in the area of F, G and H of theplastic 2 and there are six reentrant structures within the limitof I and J of the plastic part 2. The corresponding cor-pullingmechanisms sho

19、uld be designed in the five places also. Thenten core-pulling mechanisms will be placed in one mould. Sothe reasonable design of the core-pulling mechanisms is themost important in the course of designing the injectionmould.II. DESIGN OF ANGLE PIN CORE-PULLING MECHANISMSAccording to the structure fe

20、ature of the plastic parts, sixangle pin core-pulling mechanisms are designed in the areaof A, B and C of the plastic part 1 and in the area of F, G andH of the plastic part 2. The mechanisms are distributed inFigure 2.Fig.2 Distribution of the angle pin core-pulling mechanismsTaking the angle pin c

21、ore-pulling mechanism 1 shown inFig.2 for example, the mechanism is mostly composed ofslide 1, angle pin 4, positioning screw 6, slide wedge 8, wearplate 5 and wear plate 7. The mechanism is shown in figure 3When the mould is opened, the angle pin fixed in thefixed half of the mould guides the slide

22、 in the moving half ofthe mould. The slide moves outward along the slide way.The inclined plane of the cavity plate which is mated withthe slide can ensure wedging the slide when the mould isclosed. Considering the mould structure and processparameters, the inclined angle of the angle pin is 13and t

23、heinclined angle in the cavity plate is 15. The slide and thecomponents which are in touch with the slide are easy towear because the slide moves frequently. In order topostpone wearing the components, the two steps are adoptedas follow: The slide is made of 718H and is quenched to50HRC around. The

24、wear plates are laid on the bottom of theslide and on the back of the slide. The wear plates are madeof GS2510 and are quenched to 60HRC around. The slideway is formed by the slide wedge and the core plate. Theslide way is easy to machine and to maintain.1. slide 2. fixed block 3. locking block 4. a

25、ngle pin 5. wearplate 6. positioning screw 7.wear plate 8. slide wedge 9.spring rodFigure 3. Angle pin core-pulling mechanismIII. DESIGN OF ANGLE EJECTOR ROD CORE-PULLINGMECHANISMSFour angle ejector rod core-pulling mechanisms aredesigned in the area of D and E of the plastic part 1 and inthe area o

26、f I and J of the plastic part 2. The mechanisms aredistributed in figure 4.Fig.4 Distribution of angle ejector rod core-pullingmechanismsTaking the angle ejector rod core-pulling mechanism 1shown in figure 4 for example, the mechanism is mostlycomposed of angle ejector block 1, angle ejector rod 9,

27、angleejector guide block 4, angle ejector guide block 6, angle pin5, angle ejector slide 7 and wear plate 8. The mechanism isshown in figure 51. angle ejector block 2. straight guide bush 3. headed guidebush 4. angle ejector guide block 5. angle pin 6. angleejector guide block 7. angle ejector slide

28、 8. wear plate 9.angle ejector rod 10. pinFigure 5. Angle ejector rod core-pulling mechanismThe angle ejector rod is made of SUJ2 which is premiumalloy material and the surface is in nitrogen treatment. Thewear resistance of the angle ejector rod is well. By analyzingand computing, the Inclined angl

29、e of the angle ejector rod is20which ensures the realization of the core-pulling and thebetter power distribution. The angle ejector guide block ismade of nickel bronze and is fixed in the core plate. Themould is easily maintained and the precision of the angleejector rod is ensured by using the ang

30、le ejector guide block.The angle ejector rod is fixed in the angle ejector slide whichmoves along the slide way of the ejector retainer plate. Whenthe mould is opened, the angle ejector rod moves with theejector retainer plate. The angle ejector block moves aheadwith the angle ejector rod and moves

31、in the side direction. Sothe core-pulling is achieved. The angle ejector block returnsto its original position in virtue of the angle ejector rod whichis driven by the ejector retainer plate.IV. OVERALL STRUCTURE AND WORKING PROCESS OF THEINJECTION MOULDThe mould structure is shown in figure 6. The

32、layout oftwo cavities in one mould and side gate are adopted. The tencore-pulling mechanisms shown in figure 6 is reasonablydesigned and compact in terms of structure.Figure 6. Mould structureThe whole working process of the mould is as follow:The melt plastic flows into the cavity of the mould thro

33、ughthe feed system and the mould is opened after full packingand cooling. The moving plate of the injection machinemoves back together with the moving half of the injectionmould and the mould opened between the parting face of themould. The plastic parts are pulled from the cavities ofmould and stay

34、 with the moving half of the mould. The anglepins fixed in the cavity plate guide the six slides in themoving half of the mould to finish core-pulling. When themould is opened for a fixed distance, the moving half of themould stops moving back. The ejector rods of the injectionmachine move ahead and

35、 push forward the ejector plate ofthe mould with the ejector rods, angle ejector rods. Then theplastic parts are pushed out of the injection mould and corepullingis accomplished during the ejecting. When ejectorrods of the injection machine move just for 120mm, theejector mechanism stops moving and

36、the plastic parts aretaken out. The action of demoulding is completed. When themould is closed, the ejector rods of the injection machinemove back. The mould components return to their originalposition in virtue of the return pins and the angle pins. Thesecond working cycle begins after the mould is

37、 closed.V. CONCLUSIONThe mould structure is complicated. Ten core-pullingmechanisms are designed reasonably in one mould anddemoulding of the plastic parts is realized. Many inserts andstandard parts are used in the injection mould, so theeconomical efficiency of the injection mould is well and theinjection mould can be maintained conveniently. Theinjection mould is already in m