Module 03 · Exploring Desktop 3D Printing Hardware: Materials and Extrusion System桌面 3D 打印硬件：材料与挤出系统
Module 3 Overview模块 3 概述
Overview 概述
In Module 3, we again go “under the hood” to look at core systems and components, this time exploring how an extrusion system functions, and introducing the chemical properties of filament feedstock, as we complete our tour through all of the elements necessary for a clear understanding of desktop 3D printing hardware.
模块 3 中，我们再次深入“引擎盖下”，查看核心系统和组件，这次探索挤出系统的运作方式，并介绍丝材原料的化学性质，随着我们完成对桌面 3D 打印硬件所需所有元素的全面了解之旅。
Time 时间
This module should take approximately 4.5 hours of dedicated time to complete, with its videos and assignments.
此模块完成大约需要 4.5 小时的专注时间，包括视频和作业。
Lessons 课程
The lessons for this module are listed below (with assignments in bold italics):
本模块的课程如下（加粗斜体表示作业）：
| Lesson Title 课程标题 | Estimated Time Required 所需估计时间 |
|---|---|
| Module 3 Overview 模块 3 概述 | 10 minutes 10 分钟 |
| Module 3 Section 1 Lecture Videos 模块 3 第 1 节 讲座视频 |
41 minutes 41 分钟 |
| Practice Quiz 3.1 练习测验 3.1 | 5 minutes 5 分钟 |
| Module 3 Section 2 Lecture Videos 模块 3 第 2 节 讲座视频 |
27 minutes 27 分钟 |
| Practice Quiz 3.2 练习测验 3.2 | 5 minutes 5 分钟 |
| Module 3 Peer Review Assignment 模块 3 同行评审作业 |
120 minutes 120 分钟 |
| Module 3 Quiz 模块 3 测验 | 30 minutes 30 分钟 |
| Module 3 Discussion Question 模块 3 讨论问题 |
30 Minutes 30 分钟 |
Goals and Objectives 目标和目标
After you actively engage in the learning experiences in this module, you should be able to:
在您积极参与本模块的学习体验后，您应该能够：
- Demonstrate an understanding of the process by which desktop 3D printers are assembled and tested in a factory, sub-assembly by sub-assembly.
展示对工厂中桌面 3D 打印机按组件逐个组装和测试过程的理解。 - Describe the extrusion process through the feeder, hotend, and nozzle
描述通过喂料器、热端和喷嘴的挤出过程 - Compare the advantages and disadvantages of different extrusion systems
比较不同挤出系统的优缺点 - Identify the proper output of your printer nozzle
识别打印机喷嘴的正确输出 - Compare the different build plate adhesion methods
比较不同的构建板粘附方法 - Recognize the unique properties of thermoplastics that enable desktop 3D printing
识别热塑性塑料的独特特性，使其能够实现桌面 3D 打印 - Describe the reasons to select a particular material for an application
描述选择特定材料应用于某项应用的原因 - Compare different material uses for an application
比较不同材料在应用中的使用
Key Phrases/Concepts 关键短语/概念
Keep your eyes open for the following key terms or phrases as you interact with the lecture videos and complete the activities.
请注意在观看讲座视频和完成活动时留意以下关键词或短语。
- Extruder 挤出机
- Hotend 热端
- Build Plate 构建板
- Thermoplastic 热塑性塑料
- Glass Transition Temperature
玻璃转变温度 - Melting Temperature 熔点温度
Guiding Questions 引导问题
Develop your answers to the following guiding questions while watching lecture videos and working on assignments throughout the module:
在观看讲座视频和完成模块中的作业时，针对以下指导性问题发展你的答案：
- How does rapid heating and cooling of filament impact the flow of material through the system?
如何快速加热和冷却丝材会影响材料通过系统的流动？ - How important is the build plate surface and prep?
建造板表面和准备有多重要？ - How do you choose an appropriate material to use for your project?
如何选择适合您项目的材料？
Getting and Giving Help 获取与给予帮助
You can get/give help via the following means:
您可以通过以下方式获得/提供帮助：
- Use the Learner Help Center to find information regarding specific technical problems. For example, technical problems would include error messages, difficulty submitting assignments, or problems with video playback. If you cannot find an answer in the documentation, you can also report your problem to the Coursera staff by clicking on the Contact Us! link available on each topic's page within the Learner Help Center.
使用学习帮助中心查找有关特定技术问题的信息。例如，技术问题包括错误信息、提交作业困难或视频播放问题。如果在文档中找不到答案，您还可以通过点击学习帮助中心每个主题页面上的“联系我们！”链接，向 Coursera 工作人员报告您的问题。 - Use the Content Issues forum to report errors in lecture video content, assignment questions and answers, assignment grading, text and links on course pages, or the content of other course materials. University of Illinois staff and community TAs will monitor this forum and respond to issues.
使用内容问题论坛来报告讲座视频内容、作业题目和答案、作业评分、课程页面上的文本和链接，或其他课程材料的错误。伊利诺伊大学的工作人员和社区助教将监控此论坛并回应问题。