Lesson Plan Framework
DR. JOSEPH SCARCELLA FALL 20041. PRELIMINARY INFORMATION
Heading could include the following:
· Subject Being Taught
· Title of Unit
· Title of the Lesson
· Grade Level of the Students
· Hour, Section, and/or Period the Class Meets
· Date(s) the Lesson Will Be Taught
· Instructors Name
2. OBJECTIVES
Statement of Competencies as Behavioral Objectives
· Remember the components of behavioral objectives (task, condition, criteria).
· Remember the types of Behavioral Objectives (cognitive - thinking and knowing, psychomotor - doing, affective - being and feeling).
3. TEACHING METHODS OR TECHNIQUES
Name the method(s) to be used in the lesson. Examples could include:
· Audio Tapes
· Brainstorming
· Bulletin Boards
· Buzz Groups
· Chalkboard
· Debates
· Demonstrations
· Discovery
· Display
· Drama
· Drill and Practice
· Field Trips
· Work Study
· Films
· Filmstrips
· Games
· Graphics
· Assignments
· Illustrated Talks
· Independent Study
· Information Sheets
· Investigation / · Lab Work
· Small Groups
· Library
· Listening
· Diagramming
· Writing
· Models
· Oral Presentations
· Panels
· Problem Solving
· Programmed Materials
· Projects
· Question and Answer
· Resource Persons
· Role Playing
· Simulations
· Slides
· Team Teaching
· Transparencies
· Videotapes
· Visual Illustrations
· Other
4. INTRODUCTION
The purpose is to plan for how to make contact with your students.
· Raise issues of how the lesson relates to previous lessons, is necessary background for lessons which are to follow, is important for what students should know and be ale to do.
· Let students know what is going to be expected of them during the lesson.
· Other statements designed to motivate students.
5. CONTENT
Content will depend on the subject matter, objectives, and method of presenting the material. The following types of materials could be included.
· An outline for presentation or lecture that you will present.
· The steps involved in a demonstration that you will be giving.
· Key questions for a discussion format lesson that you will be leading.
6. SUMMARY
You will want to include planning of how you intend to wrap up the lesson. This section could include the following types of information.
· Ways you intend to close the session.
· Planning for how to pull loose ends together.
· Planning for how to tie this lesson to what students will be doing in future lessons.
· Making connections between the lesson and future job applications.
· Reiterating major concepts.
· Other.
7. EVALUATION
You will need to select a method of evaluation for the lesson. This could be:
· Performing a task
· Evaluating class participation levels
· A paper and pencil examination
· Other
You will need to develop the materials needed for evaluation including:
· A written examination for paper and pencil testing.
· Preparation of criteria for evaluating performance of classroom participation, for performing a task, other.
8. ASSIGNMENTS
You will want to identify assignments that you may wish to give to prepare students for the next lesson or to reinforce the current lesson. Examples include:
· A reading assignment
· Materials or supplies that they are to bring for the next lesson period.
9. RESOURCES REQUIRED
A complete listing of all materials and resources that you will need for teaching the lesson. You should include all items in list form, including:
· Your class notes
· Resource books
· Tools and equipment
· Pre and/or post testing materials
· Overheads
· Other
A complete listing of all materials and resources that the students will need to participate in the lesson. It is important to identify resources that:
· Students are expected to be responsible for.
· You will provide.
SAMPLE LESSON PLAN
TECHNIQUES IN INJECTION MOLDING
M-W-F 10:00 -12:00 A.M FALL 2000
DR. JOSEPH SCARCELLA
1. BACKGROUND INFORMATION
SECTION A: UNIT 1 INJECTION MOLDING
Lesson Plan/Demonstration Number Lesson Plan 2: Number 1 of 2
Anticipated Time Frame: 7-10 minutes
2. OBJECTIVES
· Cognitive: In a laboratory setting the student will be able to explain ram type injection molding processes consistent with the critical points outlined by the course text.
· Psychomotor: Given a ram type of injection molder and necessary tools, equipment, and materials the student will be able to manufacture a screw driver consistent with course standards.
· Affective: While working in a laboratory setting and given all tools, equipment, and materials, the student will be neat and orderly by keeping the area around the injection molder clean at all times.
3. RESOURCES REQUIRED
· Injection Molder
· Cleaning Tools
· Mold
· Spoon
· Polyethylene Pellets
· Screw Driver Shaft
· Course Text ("Industrial Plastics" by Ronald J. Baird)
· Lecture Notes
4. TEACHING METHODS
· Demonstration
· Illustrated Talk
· Discussion
5. INTRODUCTION
· Question: Can anyone in this class tell me how injection molding and thermoplastics affect them in their daily lives?
Now tell me five things you know of that are made with thermoplastics?
Present the screw driver we will be manufacturing with an injection molder to the class.
6. CONTENT
A. Injection Molding is a process for producing plastic parts by:
· Heating the plastic resin unit it becomes a viscous liquid.
· Forcing this molten into a mold whose cavity is shaped like the required item.
B. Two types of Injection Molding
· Ram Type (discuss on the ram type)
· Screw Type
They differ mainly in the methods used to force the molten plastic in the mold.
C. Ram Type of Injection Molder
· Uses a ram to force the plastic into the mold.
· The plastic compound is fed to the heating chamber, after it has been heated, the ram moves forward to inject the plastic mass into the mold.
· Ram type requires less complicated hardware.
· Only thermoplastics can be injected molded.
D. Two Types of Plastics
· Thermoplastics comprise of resins that soften with heat to become a viscous liquid and then solidify as they cool.
· Thermoset plastics can melt and solidify only once, as a chemical change takes place is irreversable.
E. The Lever Arm
· Used to apply pressure manually.
· Converts the swing motion of the lever arm to a straight up and down motion for the ram (see transparency).
· The lever arm spring is to maintain the ram and its associated parts in the upright position so the cylinder can be charged for subsequent shots.
F. Normal Operating Temperatures
· Turn the temperature control (thermostat) to high as indicated by the neon light. / · When the dial thermometer indicates the desired temperature, back off the thermostat until the neon light goes off.
· When the neon light extinguishes the temperature will e attained at (approx. 450 degrees Fahrenheit).
· This will maintain the temperature desired at + or - 5 degrees Fahrenheit.
G. Loading the Cylinder
Steps of Procedure / Commentary· Push the plastic pellets into the heated cylinder by the ram. / · Since the injection molder runs at high temperatures, it is important that proper safety be observed and demonstrated at all times.
· The purpose of the cylinder and heater assembly is to melt the pellets allowing the molten mass to be injected into the mold by the ram.
· The funnel enables the pellets to be loaded into the cylinder without spillage.
· The nozzle aligns the sprue opening in the mold to allow the molten plastic to enter the mold.
H. Heat and Pressure Needed to Form and Shape Thermoplastics
· Turn the thermostat knob to medium. This should result in a temperature of 250 - 300 degrees Fahrenheit (adjust to the correct temperature for the desired plastic being used).
· To turn knob to desired temperature, observe dial thermometer and turn knob back to where neon light indicator light turns off. / · The lever arm is used to apply pressure manually.
· The heat is applied to the plastic resin in the aluminum cylinder casing.
· The resin absorbs the heat through the aluminum walls of the cylinder casing in contact with the special steel cylinder lining.
· The resin will attain the temperature of the cylinder after a brief initial heating time.
I. Aligning the Mold in the Vise
Steps of Procedure / Commentary· Align the mold in the vise so that the sprue hole in the mold is directly under the hole in the nozzle.
· Clamp the mold solidly in place. / · Do not over tighten, bring vise pressure plate snug against the mold and then tighten 1/8 turn maximum.
J. Charging the Cylinder
Steps of Procedure / Commentary· Charge the cylinder with the plastic.
· Pack the cylinder full. / · Place small quantities of plastic into the opening at the top of the cylinder with the spoon provided.
· Depress the lever arm and bring the ram down easily.
K. When Mold has been Charged
Steps of Procedure / Commentary· Open the vise and remove the mold from the machine. / · If any flash (excess plastic), use a sharp knife to remove the excess.
· Repeat the previous steps for additional shots.
· Every movement the student makes should be done with planning and thought.
6. SUMMARY
Injection Molding is a very useful tool in manufacturing. It is important to realize that it can be done with great ease. However, care must be taken. In addition, proper operation procedures must be followed to insure that the job is done correctly.
Some important questions are:
· What particular safety checks must be done when working with the injection molder?
· What checks must be done in order to insure proper functioning?
· How would you trouble shoot the injection molding process?
· What are the effects of the materials used in injection molding?
7. ASSIGNMENTS
· Read Chapter 1
· In written form, answer questions 1 - 5 listed at the end of the chapter.
8. EVALUATION
· For Objective 1, I will give a written examination using multiple choice, fill in the blank, and essay questions on ram type of injection molding techniques consistent with critical points outlined by the course.
· For Objective 2, I will give the student a ram type injection molder and necessary tools, equipment, and materials, and have them manufacture a screw driver consistent with course standards.
· For Objective 3, I will have the student work in a laboratory setting, and given all tools, equipment, and materials, perform the task of injection molding, keeping the area clean, neat, and orderly at all times.
9. TABLE OF SPECIFICATIONS
HERE
10. EXAMINATION OR LEARNER ASSESSMENT INSTRUMENT
HERE