基于UG塑料花盆座的注塑模具设计-注射模1模2腔含三维及6张CAD图带开题报告-独家.zip
收藏
资源目录
压缩包内文档预览：
编号：46587728
类型：共享资源
大小：5.79MB
格式：ZIP
上传时间：2020-02-01
上传人：QQ14****9609
认证信息
个人认证
郭**（实名认证）
陕西
IP属地：陕西
100
积分
- 关 键 词：
-
基于
UG
塑料
花盆
注塑
模具设计
注射
三维
CAD
开题
报告
独家
- 资源描述：
-
基于UG塑料花盆座的注塑模具设计-注射模1模2腔含三维及6张CAD图带开题报告-独家.zip,基于,UG,塑料,花盆,注塑,模具设计,注射,三维,CAD,开题,报告,独家
- 内容简介：
-
2014届毕业外文文献翻译资料 模具基本术语 院 部： 机械工程学院 学生姓名： 杨越 指导教师： 陶卫民 职称 副教授 专 业： 材料成型及控制工程 班 级： 成型1004班 完成时间： 2014年5月20日 原文Basic terminology1、ImpressionThe injection mould is an assenbly of parts containing within an inpression into which plastic material is injected and cooled. It is the impression which gives the moulding its form. The impression may, therefore, be defined as thatpart of the mould which imparts shape to the moulding. The impression is formed by two mould mimbers:(i) The cavity, which is the female portion of the mould, gices the moulding its external form. (ii) The core, which is the male portion of the mould , forms the internal shape of the moulding. 2、Cavity an core platesThe basic mould in this case consists of two plates. Into one plate is sunk the cavity which shapes the outside form of the moulding and os therefore known as the cavity plate. Similarly, the core which projects form the core plate forms the inside shape of the moulding os closed, the two plates come together forming a space between the cavity and core which is the impression. 3、Sprue bushDuring the injection process plastic material is delivered to the mozzle of the machie as a melt;it is then tramsferred to the impression though a passage. The material in this passage is termed the sprue, and the bush is called a sprue bush. 4、Runner and gate systemsThe material may bedirectly injected into the impression though the sprue bush or for moulds containing several impressions it may pass from the sprue bush hole through a runner and gate system therefore entering the impression. 5、Register ring If the material is to pass without hidrance into the mould the mozzle and sprue must be correctly aligned. To endure that this is so the mould must be central to the machine and this can be achieved by including a regicter ring. 6、Guide pillars and bushesTo mould an even-walled article it is necessary to ensure that the cavity and core are keptin alignmemt. This is done by incorporating guide pillars on one mould plate which then enter corresponding guide bushes in the other mould plate as the mouls closes. 7、Fixed half and moving halfThe various mould parts fall naturally into two sections or halves. Hence, that half attached to the stationary platen of the machine (indicated by the chain dotted line)is termed the fixed half, The other half of the mould attached to the moving platen of the machine is known simply as the moving half. Now it has to be situsted. Generally the core is situated in the moving half and the overriding reason why this is so, is as follows:The moulding as it cools, will shrink on to the core and remain with it as the mould opens. This will occur irrespective of whether the core is in the fixed half or the moving half. However, this shrinkage on to the core means that some form of ejector system is almostly certainly necessary. Motivation for this ejector system iseasily provided if the core is in the moving half. Moreover, in the case of our single-impression basic mould, where a direct sprue feed to the underside of the moulding is desired the cavity must be in the fixed half and the core in the moving half. 8、Methods of incorporating cavity and coreWe have now seen that in general the core is incorporsted in the moving half and the cavity in the fixed half. However, there are various methods by which the cavity and core can be incorporated in their respective halves of the mould. These represent two basic alternatives (i) the integer method where the cavity and core can be machined form steel plates which become part of the structural build-up of the mould, or (ii) the cavity and core can be machined form small blocks of steel, termed inderts, and subsequently bolstered. The choice between these alternatives constitutes an important decision on the part of the mould designer. The final result, nevertheless, will be the contains the core is termed the core plate and the plate or assembly which contains the cavity is termed the cavity plate. 9、Cavity FabricationWhen a decision for making a mold is made, the cost is predicated on producing a specified quantity of parts without additional tooling expenditure. Sometimes, the anticipatesare quantities are exceeded; other times, they all short of requirements, and costly repairs becomenecesary in order to supply the needs.In the making of cavities by machining, grinding, or electric discharge machining, there is constant drive to improve the rate of metal removal. Cutting tools as well as machine tools are developed for heavier and faster cuts; grinding wheels are tailor-made for special steels to allow deeper cuts per pass; and EDM machines are revamped to burn the metal at an accelerated pace.It is fully appreciated that faster mental-removal rate leads to more economical manufacture,but at the same time it mast be recognized that the newer cavity fabrication is associated with generation of more heat and indirectly with higher stresses that if not relieved can cause premature gailure.Suppliers of tool steel caution the user against fabricating stresses and strongly advise a stress-relieving operation. When a steel is to be heat-treated and a preheat cycle ia part of the heat-treating specification, then the metal-removal stresses will be eliminated. A great number of cavities are made of prehardened steel, and therefore would not be heat-treated.For those cavities,a stress-relieving operation should be carried out immediately after fabricaton.the stress-relieving temperature as a rule is about 100F below the tempring heat and is held for 30 min. for each inch of steel thickness. It is best to check the stress-relieving heat and time with the maker of the steel. The information about fabrication stress has always been emphasized by the steelmakers,but for some reason it has not been given the attention it deserves. Since a tool drawing should cover all the requirements of a tool element, it would be the appropriate place for a note such as the following: Note: For heat-treated steel:“Note: Use preheat and harden to RC _.” Note: For prehardened steel:“Note: Stress relieve_F for_hours per_ inch of thickness.”Every effort should be made to eliminate the invisible source of problems, namely，fabricating stresses.Mold cavities can be produced by a variety of processes. The process to be used is Determined.First of all by the lowest cost at which the cavity can be produced for the desired end result. Other factors include precision of repairability. Frequently, a combination of processes is employed in order to meet all the specified requirements. The most common processes are discussed in the following sections. Specifically, investment casting may be considered for applications where the number of cavities is greater than six and tolerances of dimensions are in the range of 0.005. It is particularly adaptable to complex shapes and unusual configurations as well as for surface that are highly decorative and difficult to obtain by conventional processes. These decorative surface may have a wood grain, leather grain, or textured surface suitable for handle grips,etc.A lmost any alloy of steel or beryllium copper alloys can be cast to size and heat-treated metal hardness that is within the range of the alloy being cast. Acomparative cost evaluation will in many cases favor the investment process. The investment cast tooling when produced by qualified people can be of the same quality as those machined from bar stock., i.e.,they can be free of porosity, proper hardness, uniform with respect to each other, and where (and-where)the time element is a factor-can be produced in days instead of weeks. In this process, cavities have been made that weigh as much as 750 lb.The investment caqsting method calls for a model of a low-melt material such as wax, plastic, or frozen mercury. The model is a reproduction of the desired cavity block and, when cast, is ready for mounting in the base. It incorporates shrinkage allowances as well as a gating system for metal pouring. The complete model is sipped in a slurry of fine refractory material and then encased in the investment material, which may be plaster of paris or mixtures of ceramic materials with high refractory properties. With the encased investment fully set up, the model is removed from the mold by heating in can over to liquefy the meltable material and cause it to run out. The molten material is reclaimed for further use. The mold or investment casing is fully dried out during the heating. After these steps, the investment is preheated to 1000to 2000F in preparation for the pouring of the metal. The preheat temperature is governed by the type of metal. When pouring is completed and solidification of the metal has taken place, the investment material is broken away to free the casting for removal of the gates and cleaning.The making of the model for cavity and core blocks of meltable material is an intermediate step. These model blocks are cast in molds that are the staring point for the process. The starting-point mold consists of the part cavity or core where the parting line width as well as block portin for mounting, etc., are built around the part cavity and core, and thus form the shape needed as the complete block.The investment-casting process was developed commercially to a high dehree of precision and quality during World War II for the manufacture of aviation gasturbine blades were made of alloys, which were difficult or impossible to be foged. Subsequently, refinements have been developed in the investment-casting process that are especially valuable to the moldmaking field. Most these improvements are in the area of investment materials for the pyrpose of maintaining closer tolerances on the castings. Some mold shops have equipped themselves with the ability to produce investment castings alongside their regular fabrication facilities.译文模具基本术语1、成型腔（又称型腔） 注塑模具是由几部分组合在一起形成成型腔，塑料熔体注入成形腔，并在成形腔内冷却成型。是成形腔形成了塑件的形状。因此，成型腔被定义为模具的成型部件。 成形腔由两部分组成：（i） 型腔，即模具的凹模部分，形成塑件的外部形状。（ii） 型芯，即模具的凸模部分，形成塑件的内部形状。2、型腔和型芯 最简单的模具包括凉快模板。一块模板下陷成形腔，用于形成塑件的外部形状，这块木板被称为型腔板。同理，型芯板上凸起的型芯加工塑件的内部形状。这两块板拼合起来，在型腔和型芯之间形成的空间就是成型腔。3、浇口套 注塑过程中，塑料以熔融状态从注塑机喷嘴射出，然后流过一通路进入模具成形腔。熔体流过的通路称作主流道，其套称作浇口套。4、分流道和浇口系统 塑料熔体可能经过浇口套直接进入模具一个或几个型腔，或者熔体从浇口套流出，经过分流道和浇口再进入型腔。5、定位圈 如果想让熔体没有任何阻碍地进入模具，注塑机的喷嘴和模具主流道必须位于同一轴线上。为确保正确安装，模具必须安装在注塑机的中心部位，（我们可以）通过使用定位圈达到这一目的。6、导柱和导套若加工具有均匀壁厚的塑件，必须确保型腔和型芯在同一轴线，这可以依靠导柱和导套实现。导柱安装在一块模板上，合模是进入安装在另一块模板上对应的导套里。7、固定部分和移动部分 各种模具结构（虽然不同，但均匀）可以划分为两个部分或部件。因此，固定在注塑机固定板的部分称为定模部分，同理，固定在注塑机移动板的部分称为动模部分。这样模具被安装在注塑机上。通常型芯安装在动模部分，其原理如下： 塑件冷却后开模，由于熔体的收缩作用使塑件紧紧地包在行星上，这与型芯是安装在定模部分还是动模部分无关。然而塑件包紧在型芯上意味着必需使用某种形式的推出系统。如果型芯安装在动模部分，推出系统运动的动力很容易获得，此外，但型腔模具中，熔体直接进入模具内部，型腔必须固定在定模部分，型芯必然安装在动模部分。8、型腔和型芯的安装方法 现在，我们已经知道型芯通常安装在动模部分，型腔安装于定模部分。然而，型腔和型芯在模具内的安装方式有多种。这里介绍两种方式供选择：（i）整体式，型腔和型芯均由一块钢板制成，形成模具结构的一部分；（ii）型腔和型芯由小块钢板或钢块坯料加工，称为镶件，镶装在支撑板上。选择哪种（型腔和型芯的）安装形式在模具设计中十分重要。不过，不论选择哪种方式，最终结果是相同的。不论哪种设计，包含型芯的模板或组合件被称为型芯板，包含型腔的模板或组合件被称为型腔板。9、型腔制造当决定制造一个模型时，没有额外工具制造费用，成本通过生产具体量零件来进行预测。有时，超过了预计的数量；有时，他们供不应求，为了满足需要，昂贵的修理成为必须的。通过机械的，磨的，或者电子发射机械地来制造腔，有一个固定的动力来提高金属迁移速率，切割工具正如金属工具已经被发展成为更重要的和更快的切割；为了每次能得到更深的切割口，磨制的轮子用特殊的刚来定做；为了在加快的等速下燃烧金属EDM机器已经被提高（改进）。已经完全的意识到更快的金属迁移速率导致更多的电子产生，但是同时它已经被意识到更新的腔制造与产生较多的热量有关。如果没有减轻能引起早期的失败，还直接与更高的压力有关。金属钢谨慎的供应者反对制造压力和坚强地劝告压力-救助的操作，当钢将被热处理时，钢是热处理和预先加热周期的部分热处理规格，然后金属出去压力将被消减。多数的腔是用变硬的钢制成的。因此，不必进行热处理。对于那些腔在立即制定之后，一个缓解压力的操作将被实施。对于每英寸钢厚环节压力温度作为一个规则大约是
- 温馨提示:
1: 本站所有资源如无特殊说明，都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等，如果需要附件，请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸，网页内容里面会有图纸预览，若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对用户上传分享的文档内容本身不做任何修改或编辑，并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容，请与我们联系，我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
人人文库网所有资源均是用户自行上传分享，仅供网友学习交流，未经上传用户书面授权，请勿作他用。
川公网安备: 51019002004831号