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1、0,CHAPTER 5 PLASTICS FORMING AND MOLDS,5.1 Injection Molds 注塑模具 injection molds 注射模 multicavity mold 多腔注射模 molding shop 成型车间；造成车间 clamping force 夹紧力；合模力 injection-molded 注射成型的 grind 磨削；磨光 plasticizing （使）成为可塑；（使）可塑 injection capacity 注射容量 single-cavity mold 单型腔注射模,- 0 -,1,5.1.1 General 简介 The contin
2、uing development of injection-molding technology demands more and more of the processor.The most important problem in the process of injection molding is undoubtedly the correct design of the injection mold, because the molding shop has little influence, if any on the construction of the machine. Ef
3、ficient production of the most diverse injection molded parts depends primarily on the injection mold.,- 1 -,注射成型技术的持续发展要求越来越多的加工机械。注射成型工艺中最重要的问题无疑是注塑模具的正确设计，因为成型车间对机器结构本身即使有影响，也很小。 各种注射模零件的高效生产，最主要还是取决于注塑模具。,processor 加工机械；加工者 undoubtedly 无疑地 diverse 同的；变化多的,CHAPTER 5 PLASTICS FORMING AND MOLDS,2,C
4、HAPTER 5 PLASTICS FORMING AND MOLDS,The durability of the molds depends on their care and treatment. Since the moving components and cavity of the mold are always hardened and ground, they should produce between 500,000 and 1,000,000,000 shots.,- 2 -,模具的耐用程度取决于他们维护和处理。可移动（可拆装）组件和模具的型腔往往是经过淬硬和研磨的，所以它
5、们的寿命应该在50万至 10亿注射次数之间。,durability 耐久性 harden 淬火 grind(ground) 磨削,3,CHAPTER 5 PLASTICS FORMING AND MOLDS,For ease of construction and to lower manufacturing cost, injection molds are becoming standardized. Some firms offer ready-made bases of square or round design as standard or stripper plate molds
6、 for immediate use. Only the inserts then have to be fitted into the bases.,- 3 -,为使简化结构和降低制造成本，注射模逐渐标准化。有些公司提供已经做好的方形或圆形标准化底座，或即刻可用的脱模板塑模。仅仅需要把镶嵌件装进底座即可使用。,ease 简单，缓和stripper plate 卸料板 standardized 标准化 inserts 嵌入件 grind(ground) 磨削,4,CHAPTER 5 PLASTICS FORMING AND MOLDS,5.1.2 Basic Mold Construction
7、 基本模具结构 5.1.2.1 Operating Principle 工作原理 Basically the injection mold consists of two halves. One mold half contains the sprue bushing and runner system, the other half houses the ejector system. The molded part is located at the parting line (ref. To DIN 16700）,- 4 -,基本上，注塑模包括两个部分。 一半模具包含浇口套和浇注系统，另
8、一半模具装有推出系统。模具零件安装在分型面。,sprue bushing 浇注口衬套 runner system 浇注系统 ejector system 顶出装置 parting line 分型面,5,CHAPTER 5 PLASTICS FORMING AND MOLDS,5.1.2.2 Single-or Multi-cavity Molds单或多型腔模具 To set up a calculation concerning the choice of cavities in an injection mold requires accurate knowledge of the mate
9、rial to be processed, of the injection-molding machine and of the molds.,- 5 -,若要进行有关注射模型腔的计算，需要精确懂得注射生产所用的材料，注射成型机和模具。,concerning 关于；就而言,6,CHAPTER 5 PLASTICS FORMING AND MOLDS,The mold costs increase with the rising number of cavities and the relative machine costs decrease. The production time req
10、uired for a given molded part depends on the wall thickness, the injection speed, the recovery rate, the time required to cool the molded material, the cooling capacity of the mold and the necessary incidental times such as duration of pressure holding time, ejection time, delay times, etc.,- 6 -,模具
11、成本随型腔数目增多而增加，但相对来说机器花费降低了。注射成型所需时间取决于壁厚、注射速度、 回复率、 冷却注射材料所需要的时间、 模具的冷却能力、 以及必须的持压时间、注射时间、及延时等。,incidental偶然的；容易发生的；附带的,7,CHAPTER 5 PLASTICS FORMING AND MOLDS,Therefore the decision concerning the number of cavities to be determined depends on:,- 7 -,因此型腔数模取决于：,8,CHAPTER 5 PLASTICS FORMING AND MOLDS,
12、(1) size of the order (number of molded parts in connection with delivery time) (2) shape of the molded parts (size, quality requirements) (3) injection-molding machine (clamping force, plasticizing and injection capacity) (4) mold costs,- 8 -,(1) 订单规模（交付时间内注塑件的数量） (2) 注射件的形状（尺寸及质量要求 ） (3) 注射成型机 （夹紧
13、力、 塑化和注射容量）(4) 模具成本,delivery 交付 clamping force 夹紧力 plasticizing 塑化,9,CHAPTER 5 PLASTICS FORMING AND MOLDS,There are several known procedures for calculating the economical number of cavities.Unfortunately they are so varied that it is impossible to condense them.,- 9 -,有几个已知的计算合理型腔的数目公式。不幸的是它们如此不同以至
14、于不可能简化。,procedure 步骤；程序 condense 使浓缩；使压缩,10,CHAPTER 5 PLASTICS FORMING AND MOLDS,As an example: The theoretical max. number of cavities is :,- 10 -,例如：理论最大型腔数目如下： 注射机的最大注射体积（单位立方厘米） 模制的部件、 浇口和流道的体积（单位立方厘米）,theoretical 理论的；理论上的,11,CHAPTER 5 PLASTICS FORMING AND MOLDS,Plasticizing capacity in cm3/min
15、Number of shots/min (parts, sprue and runner in cm3 ) F2 must be equal to or smaller than Fl .Fl is the maximum number of cavities attainable.,- 11 -,塑化能力( 单位立方厘米每分钟) 每分钟的注射次数（零件、 浇口和流道的体积（单位立方厘米） F2一定等于或小于Fl 。Fl 是能够获得的最大型腔数量。,CHAPTER 5 PLASTICS FORMING AND MOLDS,Questions: 1）whats the advantage of
16、standardization of injection molds ? 对注塑模具标准化的优势是什么 2）From the above, what does the decision concerning the number of cavities to be determined depend on ? 从以上来看，应取决于型腔数量的决定是什么？,12,13,CHAPTER 5 PLASTICS FORMING AND MOLDS,5.1.3 Three-plate Molds 三板式注射模具 three-plate mold 三板式注射模 latch 插销；撞锁；弹簧锁 sprue 注料口；流道；直浇道 pin 钉，销 pinpoint gate 针孔型浇注系统 leaf spring 片弹簧 compression spring 压缩弹簧 star-shaped runner 星形流道 spring washer 弹簧垫圈；弹性垫圈 gatin
