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摘要低压注塑工艺是在传统注塑工艺基础上发展起来的新型技术，凭借着高精度、低次品率、低成本等优势，逐渐成为注塑成型技术发展的一个热门方向，已广泛应用于电子元件的封装等方面。但该技术在我国起步较晚，仍旧落后于国外水平，故研发出高性能自主品牌的低压注塑机成为了一项重要课题。PLC技术的加入使控制系统呈现出模块化、标准化、可二次开发等特征，故基于PLC控制核心为低压注塑机设计稳定完善的控制方案也是工作重点之一。26324
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本文以某型号低压注塑设备为研究对象，结合传统注塑技术，设计开发出一套基于PLC的控制方案，实现了注塑设备的参数设置、自动控制、手动控制、参数显示及异常报警等功能，系统稳定性好，生产精度也较高。
本文详细论述了低压注塑设备的硬件组成、工作原理、电控配置、气路连接、人机交互以及PLC系统的控制方式，为低压注塑机的研究提供了技术积累与宝贵经验。
关键词 低压注塑；PLC；控制系统；梯形图
毕业论文设计说明书外文摘要
Title Research on the Control Method of Injection Molding Low-pressure Equipment Based on PLC
Abstract
Low-pressure injection molding process, a new technology developed based on the traditional injection molding process, with advantages such as high precision low defective rate and low cost, gradually become a popular development direction of the injection molding technology, which has been widely used in electronic components encapsulation and other aspects. But this technology started late in China and still lag behind the level of foreign, so it is an important subject to develop high-performance low-pressure injection molding machines of our own brand. Because of PLC technology, control system presents the modular, standardized, secondary development characteristics. So it is one of the focuses to design a stable control scheme for machines with PLC as the control core.
In this paper, some type of low-pressure injection molding equipment is studied, and a control scheme based on PLC is designed, which can realize functions of injection molding equipment, such as parameter setting, automatic control, manual control, parameter display and abnormal alarm. The system has good stability and higher production accuracy. In this article, low pressure injection equipment was described in detail from the following aspects: hardware components, working principle, electronic configuration, gas path connection, human-computer interaction and PLC system control mode. This provides technical accumulation and valuable experience for the study of low pressure injection molding machine.
Keywords Low-pressure injection molding; PLC; Control system; Ladder Logic Programming Language
目录 1
1 绪论 2
1.1 研究目的及意义 2
1.2 课题发展概况 2
1.3 研究内容 3
2 低压注塑机硬件组成 4
2.1 系统组成及工作原理 4
2.2 开合模系统结构原理 7
2.3 工作方式及原理 8
3 电路控制与气路控制 10
3.1 电器控制系统 10
3.2 气路控制系统 11
4 PLC控制系统设计 14
4.1硬件电路 14
4.2 软件编程 17
5 人机交互界面 24
5.1 触摸屏接口介绍 24
5.2 加热控制 25
5.3 参数设置 26
5.4 手动操作 28