注塑件重量公差标准产品一模出4个,为什么每个产品重量都不相同,

来源：蜘蛛抓取(WebSpider) 时间：2017-10-24 00:25 标签： 东芝注塑机机械重量
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一模四穴塑料模具设计【毕业论文】.doc 53页
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本科毕业论文
一模四穴塑料模具设计
专业：机械设计制造及其自动化
本文以节能灯灯罩为例,介绍了基于Pro /E的一模四穴的模具设计,过程中采用的多个设计技巧, 详细地叙述了模具成型零件包括前模板、前模仁、后模板、后模仁、后模镶件、斜导柱、滑块等的设计与加工工艺过程，并较多的考虑了模具结构的调整性、易更换性及模具成本[1]。
流道是在模板上加工出的连接主流道和进入（浇口）型腔的一条沟槽。在两板式基本模具中，流道设置在分型面上而在较复杂的设计中流道也许设置在分型面的下面。
流道的壁必须光滑，防止料流受到阻碍。另外，由于流道废料必须和塑件一起取出，所以流道壁上必须不留下任何加工痕迹，避免流道废料滞留在模板上。为了确保这些要点得到满足，要求模具设计者在图纸中注明这条流道需要沿取出方向抛光。
从控制制件尺寸精度出发，对注塑模的各主要尺寸进行了理论计算，以确定各工作零件的尺寸，从模具设计到零部件的加工工艺以及装配工艺等进行详细的阐述，并应用CAD进行各重要零件的设计。推出机构与浇注系统以及其它结构的设计过程，并对试模与产品缺陷作了介绍。对塑料件典型结构的模具设计具有一定的指导意义。
关键词: Pro /ENGINEER；一模四穴；模具设计；分型面
Taking example formouse, this paper discussed how to design one cavity of fourmolds. Many design skills are used, The design and machining technology process of its molding part including the front moulding plate、front mould kernel、back mould plate、back mould kernel、back mould set piece、incline guide pin、slide steatite etc, and the adjustable character of molding structure、exchange character as well as the molding costs are all considered farther.
The runner is a channel machined into the mod plate to connect the sprue with the entrance(gate) to the impression. In the basic two-plate mod the runner is positioned on the surface while on the more complex designs the runner may be positioned below the parting surface
The wall of the runner channel must be smooth to prevent any restriction to flow. Also, as the runner has to be removed with the molding, there must be no machine marks left, which would tend to retain the runner in the mod plate. To ensure that these points are met, it's desirable for the mod designer to specify that the runner(channel) is polished 'in line of draw[10]'.
Starting from controlling dimensional accuracy, the carry the mold to the main dimensions of injection molding are carried out so as to determine the size of different parts, the molding design and the process of parts as well as assembling process and etc of injection molding are stated in details. the design process of extrusion outfit, inject syst
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