1、 I 毕业设计（论文）任务书毕业设计（论文）任务书 摘要摘要 按键导板为家用电器上的常规原件，其作用是连接按块与电路触点，为非外观 件，仅需具有适当的外观质量即可。但需具有合理的强度和刚度，具有一定的抗冲击 能力。由于按键导板需要与其他零件装配，因此要求具有合理的尺寸精度、装配精 度。同时要求注射操作简便易行，模具更换方便，周期短，注射成型过程可完全自动 化，生产效率高，经济效益好。 设计过程中主要完成的工作有拟定模具整体结构、选择合理的注塑机、完成浇注 系统、抽芯机构、导柱导向机构、脱模机构以及冷却系统等。完成了型腔和型芯工作 尺寸的计算，侧抽芯机构的相关计算和顶出机构的相关计算，以保证模具
2、的生产安全 和生产质量。最后绘制出模具的总装图。 在本套模具的设计过程中，有二个难点值得注意：一是侧向成型装置，本塑件上 有侧凹结构，其脱模方向与分型方向不一致，故采用斜滑块侧向分型；二是抽芯机构 结构的设置，该模具成型的塑件下侧有小挂钩，采用斜导柱侧向抽芯，其斜导柱固定 在定模、侧滑块型芯安装在动模的侧向抽芯。该模具采用了四个方向同时抽芯的结 构，斜导柱固定在推件板内，4 个侧滑块型芯安装在动摸板内。为防止模具分开时侧滑 块型芯产生侧向位移，模具设置了四个限位螺钉来限制型芯的移动。模具采用了在塑 件顶部直接进料的浇注系统。 设计过程中将灵活利用大学中所学的基础知识以及专业课知识，理论联系实际
3、， 所设计的模具具有工程意义，运用可靠，可以用于生产实践。 关键词关键词：按键导板；侧向成型；抽芯机构；浇注系统 II Abstract Button guide plate on a regular household appliances originals, whose role is to connect the circuit contacts in blocks, non-appearance of the pieces, only to have the proper appearance quality. But need to have a reasonable streng
4、th and stiffness, has a certain impact resistance. As button guide plate assembly and other parts required, so the accuracy required to have a reasonable size, the assembly precision. Also requires the injection operation is simple, easy to replace mold, short cycle injection molding process can be
5、fully automated, high production efficiency, good economic returns. The design process was completed for the work intended mold the overall structure, a reasonable choice of injection molding machines, complete gating system, pulling mechanism, guide pillar guide mechanism, stripping agencies and co
6、oling systems. Completed the cavity and core work size calculations, side core-pulling mechanism underlying computing and related calculations ejection mechanism to ensure mold production safety and production quality. Finally draw the mold assembly drawing. In this set of mold design process, there are two difficulties are worth noting: First, laterally forming device, the plastic parts on the concave side of the structure, its parting direction and parting direction is inconsistent, so the u
