塑料水杯的模具设计与加工

摘要

本文介绍了塑料水杯盖的成型工艺，及模具成型结构对塑件质量的影响，浇注系统的设计、顶出系统、模具成型部分和总装结构的设计，通过对模具结构方案、模具工作过程以及加工注意事项的详细分析与论述。近年来CAD/CAM技术已发展成为一项比较成熟的共性技术，模具CAD/CAM技术的硬件与软件价格已降低到中小企业普遍可以接受的程度，塑料制件及模具的3D设计与成型过程的3D分析正在塑料模具工业中发挥越来越重要的作用。我感觉UG开模相对于CAD开模有相对简单，2D图采用CAD制图，开模采用UG制图。

在设计中对模具的整体结构及模具非标准的零件经过分析，对其各种参数进行了校核，且绘制了图纸。设计过程中，重点突出了造型设计，成型零件设计，模架设计三个重要工作，在设计中用到了分流道侧浇口浇注系统。在其中造型分模中遇到一定的困难，但是通过努力最终得以解决。这次设计是对塑件及模具CAD/CAM、UG的一次大胆尝试，相信对实际生产会有一定的指导意义。

另外，本次杯子我选择了增大杯子的内径，上下上下两个杯盖，下杯盖与杯底留有一定的空间，可成放茶叶、咖啡、方便人们生活，大的杯径可让杯子多盛放东西，需要时还可以用做饭盒，两个不同的杯盖还可以交换使用。本次设计以有内螺纹的杯盖为主，杯体为辅。

关键词：塑料水杯；塑料杯盖；注塑模设计；CAD/CAM

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Abstract

This paper introduces the forming process of plastic cups, influence and mold structure on the quality of plastic parts, the design of gating system, the ejector design system, molding part and final assembly structure, the die structure scheme,Detailed analysis and discusses the working process of the mould and processing notices, try hard to let readers know the design process of injection mold.In recent years, CAD/CAM technology has developed into a relatively mature technologies, the technology of mould CAD/CAM hardware and software, the price has been reduced to small and medium-sized enterprises generally acceptable degree, 3D analysis of 3D design and molding process of plastic parts and mold is playing a more and more important role in the plastic mold industry.But I feel UG mold mold is relatively simple compared to CAD, 2D map using CAD drawing, mold using UG mapping.

In the design of the overall structure of die and die on the non-standard parts according to the analysis, the various parameters of the check, and the mapping of the drawings.In the design process, focused on the design, the design of molding parts, mold design are three important work, the shunt side gate system used in the design of. There are some difficulties in the other part, but through hard work finally settled.The design of plastic parts and mold CAD/CAM, UG is a bold attempt, I believe there will be some guiding significance for practical production.

In addition, the cup I chose the diameter of the cup, up and down two cup cover, a cup cover and a cup bottom have a certain space, can be put in the tea, coffee, convenient for people living, large cup size can let the cup to hold things, when required, can be used as a lunch box, two different cup cover can also be used. This design mainly with the internal thread of the cup cover.

Key words：Plastic cup; Plastic cup cover; Injection mold design; CAD/CAM

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目录

摘要.............................................................................................................................................. I ABSTRACT ................................................................................................................................... II 目录........................................................................................................................................... III 1 绪论 (1)

1.1选题依据及意义 (1)

1.2 本课题在国内外的研究现状 (1)

1.2.1 中国模具工业概况 (1)

1.2.2 存在问题和主要差距 (3)

2 塑件的分析 (4)

2.1 塑件技术要求分析 (4)

2.1.1 塑件的几何形状 (4)

2.1.2 塑件的工艺结构 (5)

2.2.1 注塑成型工艺参数 (5)

2.2.2 注塑成型特点 (7)

2.3 HDPE注射成型条件 (8)

3 模具型腔的设计 (9)

3.1 型腔数目的确定 (9)

3.2 注射机的选择 (9)

3.2.1 额定注射量 (9)

3.2.2 锁定锁模力 (10)

3.2.3 额定注射压力 (10)

3.2.4 G54-S200/400型注射机与模具关系 (10)

3.2.5 合模导向机构设计 (11)

3.3 分型面的选择 (11)

3.4 脱模斜度 (12)

3.5 成型零件的设计 (12)

3.6 型腔及型芯尺寸计算 (12)

3.6.1 型腔的尺寸计算 (13)

3.6.2 型芯尺寸的计算 (15)

3.7 排气槽的设计 (16)

3.8 型腔的强度校核 (16)

3.8.1 材料选择 (16)

3.8.2 强度校核 (16)

4 浇注系统的设计 (18)

4.1 浇注系统的分析 (18)

4.2 主浇道的设计 (18)

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