长方体形塑料饭盒的注塑成型及模具设计 摘要 塑料饭盒在我们日常生活里的应用十分常见，在生活中塑料饭盒给我们带来了很多方便，我们任何一个家庭中都会用到它。我们在市场中也会看见各式各样的饭盒，不同大小，不同形状，不同材质。这次设计的是日常用品的典型代表，这对我以后的模具设计的知识程度和水平有一定的提升和帮助。此次设计的塑料饭盒结构比较简单，我用了CAD软件对产品原件进行了电子绘图设计，通过查阅手头资料对产品的设计进行计算，使塑料饭盒的结构更加的合理耐用。在设计时候我们考虑到其结实并且耐用，积极查阅手上的资料进行去设计，保证了它在我们生活中的质量。我所设计的塑料饭盒是我们最长用的长方体形状。这种设计的特点是结构简单，结实，不容易损坏，清洁起来相当方便。 本次的塑料饭盒设计所主要采用的技术是注射成型，注射成型又称为注塑成型，是现今塑料加工中最常见的方法之一，注射成型的产品约占塑料产品总量的20%-30%，它是成型热塑加工的主要方法。到现在为止除了氟塑料以外，几乎所有的热塑性塑料都可以用注射成型方法去生产塑件。注射成型的最大特点是成型周期短，品种多，制品尺寸精确，产品可以快速更新换代，生产可以自动化、高速化。并且具有极高的经济效益。在设计过程之中，必须先要对方便饭盒的塑件来进行工艺性分析，并且去了解这类型塑件的特性和用途等；再逐一的对模具的基本结构进行分析，根据模具基本的结构来选择的基本模架，接着再核对相关的工艺数据，以及根据参考书上的资料以及图书馆中的资料以及公式和一系列表格和参数等。进行对型腔和型芯等零件计算并设计，最后对模具来进行加热和试模等重要环节。 关键词：模具设计; CAD;塑料饭盒;注射模 Abstract Plastics lu
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n the market a variety of lu
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ntative of the daily
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ng method.Is the biggest characteristic of i
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ng moldi
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ny varieties, product size precisio
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n check the releva
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nd parameters, etc.For calculatio
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nd desig
n of cavity a
nd core parts, fi
nally the mold to heati
ng a
nd test such as importa
nt segme
nt. Keywords: mold desig
n; CAD; Plastics lu
nch box; I
njectio
n mould 目录 第一章绪论4 1.1塑料模具的特点与发展趋势4 1.2注射模设计的要求与程序5 第二章塑件的工艺分析7 2.1材料的工艺分析7 2.2塑件尺寸精度分析8 2.3塑件的工艺分析9 第三章塑料模具设计的内容及步骤10 3.1塑件的设计10 3.2塑料的种类11 3.3壁厚及制件体积计算13 第四章成型的模具设计14 4.1成型零件的工作尺寸计算14 4.2型腔和型芯的长、宽、深度尺寸计算15 4.3支撑板的计算17 4.4浇注系统设计计算17 4.5脱模机构的设计与计算20 4.6拟定成型方案23 第五章注射机的选择26 5.1最大注射量校核26 5.2注射压力校核26 5.3锁模力校核27 5.4开模行程及顶出型模校核27 5.5注射机的工艺分析27 表5-1注射机选择28 第六章模具材料的选择29 6.1满足工作条件要求29 6.2满足工艺性能要求29 6.3满足经济性要求30 结论32 致谢33 参考文献34