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1、毕业役计(论丈丿译文及原稿译文题目应用抽芯机构在注塑模具的设计原稿出处原稿题目 Application of Coie-pulling Mechanism in Injection Mould Design2009 International Conference on Industrial Mechatroiiics and Automation抽芯机构在注塑模具设计的应用黄贵剑、李雪梅、吴小宇、李继兵1o大学机电和控制工程、深圳大学、中国深圳5180602o建筑环境和管理学院,中凯大学的农业工程,中国广州3o机械、汽车制造、华南理工大学、中国广州,5106404深圳市重点实验室的先进的模具

2、制造技术、深圳大学、中国深圳518060电子邮件:huang. gu i j i an163. com摘要:对两个汽车发动机构造特征、形成进行了分析。对注塑模具的结构设计与两腔 和工作过程的进行了探讨。模具结构比较复杂。10抽芯机构被合理设计在一个模具及 脱模的塑料配件的实现。许多的插入和标准的部分用于注塑模具,这样注塑模具、注 塑模具的经济效益好,而且维护方便。注射模具已经是在大规模生产,工业实践证明,这 个行动的抽芯机制,弹射机制和复位机制,稳定可靠。塑料部件能满足客户的技术要求。关键词注塑模具、抽芯机构;幻灯片,脱模1 简介以下是两个汽车发动机的表面,如图,1。塑料配件开始被大规模生产成

3、两个塑料的部件,而且 是要被塑造成一个模子。塑料配件是由聚丙烯(PP)做的。该配件成型后会缩0.95%。两个塑料部件 的提纲维度分别是 124.26imnX X219.16min 78.6mg和 174.58minX X221.67nun 146.32mm。这 两个塑料部件的基本的壁厚是1.8亳米。而且,这个塑料部件的外观要保持完美,浇注的标志,不 允许出现在塑料部件表面上。注射的缺陷,如焊接线、沉马克,、闪光、变色等,也不允许出现,两 个塑料部件的分隔表面制作起来是非常困难的,两个塑料部件的分隔表面和复杂曲面具都有着凹凸 不平的步骤的形状。于是,就采用侧浇扣,那里有2种构造在A和B的塑料第一

4、部分,在C的塑 料第一部分的区域,其拔模角的角度为零,并且,在六个凹进去的结构里,C和D的塑料第一部分 被限制。相应的抽芯机制设计应在5个地方。在FHG的塑料第二部分区域里,有三种构造,I和J 的塑料第二部分在这三种构造里有六个凹进去的限制,在五个地方,相应的cor-pulhng机制也应设 计成一样。然后十个抽芯机制将放置在一个模子。所以合理的设计机制并且注入模具是抽芯设计过 程中最重要的坏节。塑料第一部分塑料第二部分图1。塑料部件二。斜导柱抽芯机构的设计根据塑料配件结构特的特点,6个斜导柱抽芯机机构被设计在A、E、C的塑料第一部分以及F、G和H的塑料的第二部分,这个机制是分布在图2。如下:图

5、2分布的斜导柱抽芯机构,以上是斜导柱抽芯机构1中在图2中的显示,例如,该机制的主要由滑块1、斜导柱4、定位螺 丝钉6,滑动楔板8、耐磨护板5和耐磨护板7组成,该机制如图3所示。当模具打开的时候,斜顶柱被固定在固定的模具中间,引导卞滑到模具的一半,运动沿着下滑 道滑动,与其配对的斜面腔板能够确保劈滑动作用,当模具关闭的时候。考虑到模具结构及工艺参 数的问题,这个倾斜角的角度被定为13度,斜板的角度被定为15。由于滑动频繁,在接触的滑动部件就容易磨损。为了减少部件的磨损,于是采用了以卞两个步骤,首先,滑动部件是由718H和 淬火50HRC做的。耐磨护板被放置在滑动部件的底部和后面,其次,耐磨护板是

6、由GS2510和60HRC 组成,滑道是由滑动锲板和铁芯片组成,而且,滑道很容易机和维护。图3顶针板抽芯机构1. 滑块2.固定件3.压块.4.斜导柱5.耐磨护板6.定位螺丝7.耐磨护板8.滑动锲板9弹簧杆三、弹射杆设计的角度抽芯机制四个斜顶杆抽芯机构被设计在D和E的塑料第一部分,I和J的塑料第二部分。这个机构被分布在 图4。如下:图4斜顶杆抽芯机械的分布以在图4显示的斜顶杆抽芯机构1为例,该机制的主要是由斜顶块1、斜顶杆9、斜顶导向板4、斜顶导向板6、斜导柱5、斜顶滑动杆7和耐磨护板8组成的.这个机制是显示在图5,如2ID、图5斜顶杆抽芯机械1.斜顶块2.直线导套3.带头导套4.斜顶导块5斜导

7、柱6.斜顶导块7.斜顶板8耐磨护板 9斜顶赶 10销斜顶杆机构是由SUJ2制作的,SUJ2是一种由优质铝合金材料,而且他的表面经过氮处理。斜顶杆 的耐磨性能非常的好,通过分析和计算,斜导杆的倾斜角度是20 ,这样的角度可以确保实现抽芯 和的受力分布。斜顶导向块是有線铜和被固定的铁芯片组成,这类模具的维护是很容易的,其次,斜顶 杆的梢密度由斜顶导向块来确保。斜顶杆机构被固定在斜顶块上,这个斜顶块是沿着而针板的滑动而移 动的。当模具大块的时候,斜顶杆随着而针板移动,斜顶块在侧向提前随着斜顶杆的移动而移动。就这 样,这个抽芯的日的得到了实现。如果执行失败,斜顶杆受到而针板的推动,斜顶块由于斜顶杆而返

8、回 到起始位置的坐标。五、注塑模具的整体结构和工作过程模具结构如图6。是一个模具的两腔和侧浇口的布局,10个抽芯机制如图的的设计,是合理的,机构紧凑的。图6如下:图6.模具结构整个模具工作过程如下:融化塑料流入型腔模具通过浇注系统,在全部填充满后,模具才打开。注 射成型机的移动板块由于杠杆原理一起向后移动,在模具的表而分段加工中模具被打开。塑料部件从模 具的凹陷孔里被拿出,与塑料动模保持一致,斜导柱被插入到母模的导向板中,机构的抽芯步骤由塑料 动模的6个滑动块来完成。当模具打开的时候,必须要有一个固定的距离。塑料动模停止向后移动。注 塑成型机的顶出杆向前移动,并且向顶出杆模具的顶针板前推,斜顶

9、杆。然后那个塑料件被挤出模具, 并且在对喷射抽芯完成。注塑成型机的顶出杆只需要移动120亳米。当脱模器停止运动后,塑料零件就 会被取出来。这样,脱模这个动作就完成了,那时候,模具就被封闭起来。注塑成型机的顶出杆向后移 动。由于回位销和斜导柱的关系,模具部件将回到他们原来的位置。在模具封闭后,第二个工作周期就 开始了。六、结论模具的结构是比较复杂的。10个抽芯机构被合理的设计在一个模具内及塑料部件脱模过程的实现。 很多的镶嵌件和标准零件被用于注塑模具。所以,注塑模具的经济效率非常的好,而且注塑模具的维修 比较的容易。注塑模具己经开始批量的生产,工业实践证明,抽芯机构、弹射机制和复位机制的功能 是

10、相当的稳定和可靠的。塑料部件己经可以满足客户各方而的技术要求答谢这个工作受到工程企业,大学和研究机构,广东省教育部的大力支持和授权同总。参考。1 奥斯汀c计算机辅助工程塑料注塑成型,应用计算机辅助工程塑料注塑成型M,纽约出版社 1987年出版。2 王KK、Khullar王建民W由电脑注塑模具的设计J。塑料工程,1981年1月1日(11):25273 史、柯正龙”,国立中山大学电机,问陆g。注塑工艺的优化和软计算。智力。Adv.之日 Manuf.Teclmol.2003;656-661 4 ,m. Turng Peic 0电脑辅助设计和优化过程中注入成型。IMechE. 2002;于216:15

11、23年。5 。PBtch 和 W.Michaeli。“注塑成型。介绍”。艾徳。Hanser,慕尼黑,19956 D.M.Brycea塑料注塑成型。生产工艺原理”。制造工程师学会。1996年,密西根州,Dearbonr授权许可484原文2009 International Conference on Industrial Mechatronics and Automation978-1 -4244-3818-1 /09/S25.00 2009 IEEE ICIMA 2009Application of Core-pulling Mechanism in Injection Mould Desig

12、nHuang Guijiam, Li Xuemeiz, 3, Wu Xiaoyiu, Li Jibui41. College of Mechatronics and Control Engineering. Shenzlien University. Shenzhen, China, 5180602. Institute of Built Environment and Control, Zhongkai University of Agriculture and Engineering, Guangzliou. China3 School of Mechanical & Automotive

13、 Engmeering. South China University of Technology. Guangzhou, China, 5106404 Shenzhen Key Laboratory of Advanced Mould Manufacturing Teclinology, Shenzhen University, Shenzlien. China, 518060Email: huang.gmiianAbstractIn this paper, the structural feature and forming technology of two automobile eng

14、ine covers are analyzed. The mould structure with two cavities is designed and the working process of the injection mould is discussed. The mould structure is complicated. Ten corepulling mechanisms are designed reasonably in one mould and demoulding of the plastic parts is realized Many inserts and

15、 standard parts are used in the injection mould, so the economical efficiency of the injection mould is well and the injection mould can be maintained conveniently. The injection mould is already in mass production. Industrial practice proves that the action of the core-pulling mechanisms, ejector m

16、echanisms and resetting mechanisms is stable and reliable. The plastic parts produced can meet the custoiners, technical requirements Keywords injection mould; core-pulling mechanism; slide;demouldingI. IntroductionTwo automobile engine covers are shown m figure l.The plastic parts are in mass produ

17、ction and the two plastic parts are asked to be moulded in one mould The plastic parts are made of polypropylene (PP) The molding sliruikage is 0.95% The outline dimensions of two plastic parts are 124.26minx219.16mmx78.6inm and 174.58mmx221.67minx 146.32mm The basic wall tliickness of the two plast

18、ic parts is 1.8mm The appearance of the plastic parts should maintain perfect. The mark of pourmg and 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 Design of the partmg sur

19、face of the two plastic parts is difficult. The partmg surface is complicated curved surface and it has uneven step shape The side gate is adopted There are two reentrant structures in the area of A and B of the plastic part 1、the draft angle is zero in the area of C of the plastic part 1 and there

20、are six reentrant structures witliin the limit of Dand E of the plastic part 1 The corresponding core-pulling mechanisms should be designed m the five places There are three reentrant stmctures in the area of F, G and H of the plastic 2 and there are six reentrant structures witliin the limit of I a

21、nd J of the plastic part 2 The correspondmg cor-pulling mechanisms should be designed in the five places also. Then ten core-pulling mechanisms will be placed m one mould Sothe reasonable design of the core-pulling mechanisms is the most unportant in the course of designing the injection mould(a) Pl

22、astic part 1(b) Plastic part 2II. DESIGN OF ANGLE PIN CORE-PULLING MECHANISMS According to the stnictiire feature of the plastic parts, six angle pin core-pulling mechanisms are designed in the area of A. B and C of the plastic part 1 and in the area of F, G and H of the plastic part 2 The mechanism

23、s are distributed inFig.2 Distribution of tlie angle pin core-pulling mechanisms Taking the angle pin core-pulling meclianism 1 shown in Fig.2 for example, the meclianism is mostly composed ofslide 1、angle pin 4, positionnig screw 6, slide wedge & wear plate 5 and wear plate 7 The mechanism is shown

24、 in figure 3 When the mould is opened, the angle pin fixed m the fixed half of the mould giudes the slide in the moving half of the mould The slide moves outward along the slide way. The inclined plane of the cavity plate which is mated with the slide can ensure wedging the slide when the mould is c

25、losed Considering the mould structure and process parameters, the inclined angle of the angle pin is 13and the inclined angle m the cavity plate is 15. The slide and the components which are in touch with the slide are easy to wear because the slide moves frequently. In order topostpone wearing the

26、components, the two steps are adopted as follow: The slide is made of 718H and is quenched to 50HRC around. The wear plates are laid on the bottom of the slide and on the back of the slide The wear plates are madeof GS2510 and are quenched to 60HRC around The slide way is formed by the slide wedge a

27、nd the core plate. The slide way is easy to macliine and to maintain1 slide 2. fixed block 3 1 ocking block 4. angle pin 5 wearplate 6. positioning screw 7.wear plate 8 slide wedge 9spring rodFigure 3 Angle pin core-pulling mechanismIII. Design of angle ejector rod core-pullingMECHANISMSFour angle e

28、jector rod core-pulling mechanisms are designed in the area of D and E of the plastic part 1 and in the area of I and J of the plastic part 2 The mechanisms are distributed in figure 4.Fig.4 Distribution of angle ejector rod core-pullingmechanismsTaking the angle ejector rod core-pulling mechanism 1

29、 shown in figure 4 for example, the mechanism is mostly composed of angle ejector block 1. angle ejector rod 9, angle ejector guide block 4, angle ejector guide block 6. angle pin 5, angle ejector slide 7 and wear plate 8 The mechanism is shown in figure 51. angle ejector block 2 straight guide bush

30、 3 headed guidebush 4. angle ejector guide block 5 angle pm 6. angleejector guide block 7 angle ejector slide 8 wear plate 9angle ejector rod 10. pinFigure 5 Angle ejector rod core-pulling mechanismThe angle ejector rod is made of SUJ2 which is premium alloy material and the surface is in nitrogen t

31、reatment The wear resistance of the angle ejector rod is well. By analyzing and computing, the Inclined angle of the angle ejector rod is 20which ensures the realization of the corepulling and the better power distribution. The angle ejector guide block is made of nickel bronze and is fixed in the c

32、ore plate. The mould is easily maintained and the precision of the angle ejector rod is ensured by using the angle ejector guide block. The angle ejector rod is fixed in the angle ejector slide which moves along the slide way of the ejector retainer plate. Whenthe mould is opened, the angle ejector

33、rod moves with theejector retainer plate. The angle ejector block moves aliead with the angle ejector rod and moves in the side direction. So the core-pulling is achieved The angle ejector block returns to its original position in virtue of the angle ejector rod which is driven by the ejector retain

34、er plate.IV. OVTRALL STRUCTURE AND WORKING PROCESS OF THEINJECTION MOULDThe mould structure is shown in figure 6 The layout of two cavities in one mould and side gate are adopted Theten core-pulling mechanisms shown in figure 6 is reasonably designed and compact in terms of structure.sFigure 6. Moul

35、d structureThe whole working process of the mould is as follow:The melt plastic flows into the cavity of the mould througli the feed system and the mould is opened after full packuig and cooling The moving plate of the injection machine moves back together with the moving half of the injection mould

36、 and the mould opened between the parting face of the mould The plastic parts are pulled from the cavities of mould and stay with the moving half of the mould The angle pins fixed in the cavity plate giude the six slides in the moving half of the mould to finish core-pulling. When the mould is opene

37、d for a fixed distance, the moving half of the mould stops moving back The ejector rods of the injection machuie move aliead and push forward the ejector plate of the mould with the ejector rods, angle ejector rods Then the plastic parts are pushed out of the injection mould and corepullmg is accomp

38、lished durmg the ejecting. When ejector rods of the uijection machine move just for 120mm. the ejector mechanism stops moving and the plastic parts are taken out. The action of demouldmg is completed When the mould is closed, the ejector rods of the injection machuie move back The mould components r

39、eturn to their original position m virtue of the return pins and the angle pins. The second working cycle begins after the mould is closed V. ConclusionThe mould structure is complicated Ten core-pulling mechanisms are designed reasonably in one mould and demouldmg of the plastic parts is realized Many inserts and standard parts are used m the iiijection mould, so the economical efficiency of the injection mould

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