# Chemistry & Creation of Making Plastic Parts

ACP Lesson Plan

Overview / Description:

In this unit, students will be able to explain and demonstrate how plastic parts are made and understand the chemistry involved in making different parts to meet different customer requirements. As a summative assessment, students will be creating and testing their own DIY injection molding machine.

Learning Goals/Objectives:

After completing this activity, students should be able to:

• throughly explain the concept, process and chemistry of plastic injection molding
• demonstrate the process using a "Makerbot" or other similar machine

Content Standards

Common Career Technical Standards

Career Development

CD4: Students will identify and apply employability skills. \

CD4.a.6.h: Evaluate how self discipline, self-worth, positive attitude and integrity displayed in a work situation affect employment status.

Wisconsin Standards for Technology and Engineering

Manufacturing

MNF1.d: Select, use and identify manufacturing processes such as casting, forming, machining, joining, rapid manufacturing (CNC) and treating/coating.

MNF1.d.6.h: Demonstrate the interchangeability of parts increases the effectiveness of manufacturing processes.

Wisconsin Standards for Science

Physical Science - Three-Dimensional Performance Expectation

HS-PS1-5. Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or 26 concentration of the reacting particles on the rate at which a reaction occurs.

HS-PS1-6. Refine the design of a chemical system by specifying a change in conditions that would produce increased amounts of products at equilibrium.

Scale, Proportion, and Quantity

Standard SCI.CC3: Students use science and engineering practices, disciplinary core ideas, and an understanding of scale, proportion and quantity to make sense of phenomena and solve problems.

Disciplinary Core Ideas:

SCI.PS1.B.h Chemical processes are understood in terms of collisions of molecules, rearrangement of atoms, and changes in energy as determined by properties of elements involved.

SCI.ETS1.C.h Criteria may need to be broken down into simpler ones that can be approached systematically, and decisions about the priority of certain criteria over others (trade-offs) may be needed.

Materials:

Learning Activities:

Assessment: Observational & Project/Presentation

Formative Assessments -

1. Along the way, the teacher will use observational checks as well as homework/lab checks to ensure that students are on track to complete this project on time.

2. Students will be asked periodic questions so that they can show understanding of the material they researched as well as be able to explain what is going on at different points in the building process. Examples of questions include:

Summative Assessment -

Wrap-Up:

Students will give a brief report on planning and building their injection molding machine and show the class their final product.

Extension Activity (for intervention or enrichment):

IEP/504 Students: Depending on their level of proficiency, students can create a report/Powerpoint/ or work alone to build a machine with extended time.

Higher-Level Student: These student can be tasked with making more complicated injection molding machine to create a more detailed final product.

All Students: Can/will be tasked with completing a choice project of either a simple process machine, a more complicated machine or a paper, a different but similar project, or a powerpoint explaining the processes involved.