机械5

泡沫灭火器喷嘴的注塑成型工艺及模具设计 摘要 这次设计的题目是泡沫灭火器喷嘴的注塑成型工艺及模具设计，通过对塑件进行工艺分析和设计注塑模以及对结构的相关计算，对模具闭合高度的计算，对注塑机进行相关参数的检验和确定等，确定了该模具基本符合要求。 这个塑件要求表面光滑且没有凹陷没有毛刺，因为没有其它的特别要求，所以用注塑的方法比较容易实现。根据塑件的成型要求和模具型腔的布置，选择潜伏浇口更合适。型芯采用组合式结构，有利于充填和排气。 型芯主要是成型件的内表面。该模具将型芯固定在固定模具的一侧，可以简化模具的结构。考虑到加工难度和材料的价值利用，以及塑件的形状和尺寸，考虑到塑件的生产能力，该模具采用一模两块的结构。阴模主要形成塑料件的外表面，结构相对简单。空腔设计成组合结构，既保证了塑件的外观和质量，又便于模具的加工。从塑件的结构来看，空腔和倾斜滑块设计在一起，形成抽芯机构。 关键词：一模二腔;合式型腔;滑块抽芯;潜伏式浇口 Abstract The topic of this desig
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nkle 目录 摘要1 Abstract 2 绪论3 第一章模塑工艺规程的编制6 1.1塑件的原材料分析6 1.2塑件的结构、尺寸精度及表面质量分析7 1.3计算塑件的体积与质量8 1.4塑件注塑工艺参数的确定9 第二章注塑模结构设计10 2.1分型面的选择10 2.2确定塑件型腔的排列方式11 2.3浇注系统12 2.4导柱和导套的选择13 2.5排气系统的设计15 2.6抽芯机构设计15 2.7成型零件的结构设计16 第三章模具设计的有关计算18 3.1型腔、型芯工作尺寸的计算： 18 3.2腔侧壁厚度、底板厚度计算19 第四章模具加热与冷却系统的计算21 4.1模具温度调节系统21 4.2加热与冷却的选择21 4.3冷却系统的计算21 第五章模具及注塑机参数的确定25 5.1模具闭合高度的确定25 5.2注塑机参数的确定25 第六章绘制模具总装图及非标准件工作图26 第七章模具装配27 8.1模具安装27 8.2试模27 设计总结31 致谢32 参考文献33