斜齿轮注塑模具的设计
摘 要
进入21世纪，在经济全球化的新形势下，随着资本、技术和劳动力市场的重新整合，中国装备制造业在加入WTO以后，将成为世界装备制造业的基地。而在现代制造业中，无论哪一行业的工程装备，都越来越多地采用由模具工业提供的产品。为了适应用户对模具制造的高精度、短交货期、低成本的迫切要求，模具工业正广泛应用现代先进制造技术来加速模具工业的技术进步，这是各行各业对模具这一基础工艺装备的迫切需求。本设计题目为斜齿轮组件塑料注塑模，但对做毕业设计的毕业生有一定的设计意义，它概括了斜齿轮组件塑料零件的设计要求、内容及方向。通过对该零件模具的设计，进一步加强了设计者注塑模设计的基础，为设计更复杂的注塑模具做好了铺垫和吸取了更深刻的经验。通过对方案的选择：从零件图上分析：该零件总体形状为带凸缘的斜齿轮组件，形状简单，结构合理且制件的壁厚均匀，在两边相交的部分也都设有圆弧过渡，在成型时塑料在模具型腔内流动阻力相对较小有利于制品的成型。本塑件是斜齿轮组件在齿轮外侧的齿槽与开模方向不一致且它们之间有一个螺旋的角度所以在脱模时必须考虑设计一个能在开模时随着开模过程的进行使塑件和型腔同时旋转一个角这样才能在开模时顺利把制件顶出，在本副模具的设计中，在顶管的尾部安装了推力轴承，在开模时顶杆顶动轴承盖及轴承座使推块上升，在上升的过程中，由于塑件及推块同时发生转动，直到塑件脱出型腔。这种机构脱模可靠，设计方便且在模具中占用空间较小，非常适合在本副模具中使用。相信不久本模具投入市场一定能带来很好的效益服务大众，服务社会。
关键词：塑料注塑模 斜齿轮组件 推力轴承 轴承盖 推块 型腔
Abstract
In the twenty-first Century, under the new situation of economic globalization, with the reintegration of capital, technology and labor market, China's equipment manufacturing industry will become the base of the world equipment manufacturing industry after its entry into the WTO. In the modern manufacturing industry, more and more products are supplied by the mold industry, no matter which industry's engineering equipment. In order to adapt to the urgent requirements of the high precision, short delivery time and low cost of the mould manufacturing, the mould industry is widely applying modern advanced manufacturing technology to accelerate the technological progress of the die industry, which is an urgent demand for the basic technological equipment of all walks of life. The design title is plastic injection mould for helical gear components, but it has certain design significance for graduates who are graduating. It summarizes the design requirements, content and direction of the plastic parts of helical gear components. Through the design of the mould for this part, the foundation of the design of the designer's injection mold is further strengthened, and a more profound experience has been made for the design of more complex injection moulds. Through the selection of the scheme: from the part diagram, the overall shape of the part is a helical gear assembly with a flange. The shape is simple, the structure is reasonable and the wall thickness of the workpiece is uniform, and the arc transition is also set in the parts of the two sides. This plastic part is a helical gear component in the outside of the gear slot and the direction of the open die is not consistent and there is a spiral angle between them, so in the mold release, it is necessary to consider the design of an angle in which the plastic part and the cavity can be rotated at the same time with the opening process. In the design, the thrust bearing is installed at the end of the pipe top. In the opening of the die, the top rod top bearing cover and the bearing seat make the push block up. In the process of rising, the plastic part and the push block rotate at the same time until the plastic part is out of the cavity. The mechanism is reliable in ejection, easy to design and occupies less space in the mold, so it is very suitable for use in this mould. I believe that this mold will soon bring into the market and bring good benefits to serve the public and serve the society.
Keywords: plastic injection mould, helical gear assembly, thrust bearing, bearing cap, push block type cavity.
目录
绪论 4
课题背景 4
我国模具技术的现状 4
我国模具技术的发展趋势 5
结论 6
第一章 任务来源及设计目的意义 1
1.1 设计任务来源 1
图1-1 产品零件图 2
1.2 设计目的及意义 2
第二章 零件的工艺性分析 3
2.1 塑件的工艺性分析 3
2.2 塑件的结构和尺寸精度及表面质量分析 4
2.2.1 结构分析 4
2.2.2 尺寸精度分析 4
2.2.3 表面质量分析 5
2.3 计算塑件的体积和质量 5
2.4 塑件注塑工艺参数的确定 6
第三章 注塑模的结构设计 7
3.1 分型面的选择 7
3.2 确定型腔的排列方式 8
3.3 浇注系统设计 9
3.4 成型零件结构设计 11
第四章 模具设计的有关计算 12
4.1 型腔和型芯工作尺寸的计算 13
4.2 型腔侧壁厚度及底板厚度计算 14
（1）凹模型腔侧壁厚度计算 14
(2)底板厚度计算 14
第五章 脱模机构的设计 14
第六章 模具加热与冷却系统的有关计算 15
二、求冷却水的体积流量V 16
第七章 模具闭合高度的确定 16
第八章 注塑机有关参数的校核 17
第九章 绘制模具总装图和非标准零件工作图 18
第十章 注塑模主要零件加工工艺规程的编制 19
10.1 定模镶件加工工艺过程 19
10.2 动模镶件加工工艺过程 20
第十一章 模具的安装与调试 22
11.1模具的安装： 22
11.2 模具的调试： 23
设计总结 24
致谢 25
参考文献 26
绪论
课题背景
模具工业是国民经济的重要基础工业之一。模具是工业生产中的基础工艺装备，是一种高附加值的高精密集型产品，也是高新技术产业化的重要领域，其技术水平的高低已经成为衡量一个国家制造业水平的重要标志。近几年，我国塑料模工业有了很大发展，注塑模具制品的种类越来越多，在未来的模具市场中，塑料模具发展速度将高于其它模具，在模具行业中的比例将逐步提高。在电子、汽车、家电、玩具等产品中，60%-100%的零部件，都要依靠模具成形。用模具生产制件所表现出来的高精度、高复杂程度、高一致性、高生产率和低消耗，是其他加工制造方法所不能比拟的。
