| Inspect, remove, label, store, and reinstall exterior trim and moldings.
Lesson Plan for
CRT 130-1
NON-STRUCTURAL ANALYSIS AND DAMAGE REPAIR SECTION I
Course HS Title:
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Non-Structural Analysis and Damage Repair
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Program:
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KCTCS Courses included in HS Title: (Lesson is prepared for course highlighted.)
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KCTCS Course No.
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KCTCS Course Title
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Introduction/Context
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This lesson will instruct the student on how to inspect, remove, label, store, and reinstall exterior trim and moldings. Knowledge of these techniques and the skills required to correct problems associated with this task are necessary for a student to acquire if they wish to compete for high paying, high skilled jobs in an Automotive Repair Facility. Entry level technicians need to be able to perform this task to 100% accuracy. Incorrectly performing this task can lead to an automobile accident or create customer satisfaction issues.
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Prepared By
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School
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Date:
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Grade Level
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No. Students
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No.IEP's:
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Lesson Length:
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Task
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Inspect, remove, label, store, and reinstall exterior trim and moldings.
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No.
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Objective
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1
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Given the proper tools and instruction, the student will be able to inspect, remove, label, store, and reinstall exterior trim and moldings, and pass a written test covering the task with 100% accuracy.
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Connections:
New Common Core:
RST 11-12-2
RST 11-12-3
A-CED-4
New Common Core Technical
TD-SYS-1
TD-OPS-3
New Science Standards
HS-PS2-3.
Skills Standards:
AA001
EG011
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INSTRUCTIONAL MATERIALS/TECHNOLOGY
Teacher Designed Materials and Other Handouts
Textbooks and Workbooks
Author
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Title/ISBN No.
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Edition
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Publisher
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Pages
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James Duffy
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I-Car Professional Automotive Collision Repair
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Delmar
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393-394
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Toboldt/Richardson
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Auto Body Repairing and Refinishing
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Goodheart Wilcox
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162-163
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Supplies
Quantity
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Item
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Source
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As Needed
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Rubber Gloves
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Various
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As Needed
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Manuals (Collision Manuals)
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Various
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Equipment
Quantity
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Item
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Source
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As Needed
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Tools (Trim Panel Tool Set)
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Various
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As Needed
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Heat Gun
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Various
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Content/Presentation/Demonstration Outline
Instruct students that exterior automotive trim is used to add strength, insulate, identify a model, deaden sound, conceal joints, finish or protect edges, and beautify. Exterior trim pieces that accent glass openings are called reveal moldings. Automotive trim is made from a variety of materials, including stainless steel, aluminum, plastic, metal, rubber, and fabric. Stainless steel is very durable and can be polished to a high-gloss finish. Drip rail moldings, wheel opening moldings, side moldings, and reveal moldings are often made of stainless steel. Exterior trim moldings are sometimes referred to as "chrome." This term stems from a time when nearly all trim moldings were made of chrome-plated steel. Aluminum trim has replaced many chrome-plated steel and stainless steel trim parts. Aluminum is lighter and less expensive than steel. It can be die-cast into emblems, letters, and doorknobs; stamped into step plates and raised moldings; and extruded into side moldings and other components. Additionally, aluminum can be polished to a chrome-like finish.
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Inform students that Plastics are now being used extensively in the manufacture of automotive trim. There are several advantages to using plastics for trim pieces, including the following: 1. Plastics can be made into flexible parts 2. Plastics can be molded into various shapes 3. Plastics are lighter than most metals. 4. Plastics will not rust 5. Plastics can be molded in nearly any color. Plastics can also be made to simulate chrome-plated items. Some plastics are molded into soft (cellular or rubber-like material) trim panels, while others are formed into grilles, bumpers, knobs, and moldings.
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Wood-grain transfer films are used to simulate wood. They are often used on the sides of mini-vans and station wagons. Decals (decalcomanias) and accent stripes are used on many vehicles to add a decorative, customized look.
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Screws, bolts, retaining clips, molded studs, retainer inserts, and adhesives are commonly used to attach trim pieces to body panels. Some trim pieces are self-locking and are designed to snap-fit when forced into position. It is often necessary to remove exterior trim when repairing panels, replacing glass, or working on door mechanisms. Repairing trim pieces is generally difficult and time consuming. Therefore, most damaged trim pieces are replaced. Instruct students that moldings and trim can be held on with adhesive, mechanical fasteners, or both. If in doubt, inform students to check the service manual or computer database, which will describe how each molding or trim is held in place.
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Instruct students that to remove molding or trim that is held on by adhesive, place masking tape next to the molding or emblem to protect the surface from scratches. Heat and warm the molding or emblem with a heat gun to soften the adhesive. Then, force a molding removal tool or knife under the part to separate the adhesive from the body. Pull outward on the molding or emblem as you carefully work the tool behind the part. If a quantity of adhesive remains on the vehicle, students might want to cover the spot with a sheet of plastic and heat the adhesive again. This will soften the remaining adhesive and allow you to remove it easily with a putty knife or scraper. Be careful not to overheat the surface. Heating the old adhesive to about 104-122 degrees F (40-50 degrees C) should soften it enough for easy removal.
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Inform students that if you are reusing the old molding or trim, clean the remaining adhesive off its mounting surface. Scrape off the bulk of the old adhesive without cutting and damaging the molding or emblem. Then, wrap the part in plastic film and heat soften the adhesive. Scrape the remainder of the adhesive off the part. Instruct students that when installing an adhesive-backed molding or emblem, make sure the vehicle surface is perfectly clean. If not, the molding can come off. If needed, use masking tape as a guide for molding installation. Carefully apply the masking tape to the vehicle in a perfectly straight line. Then, position the molding next to the masking tape before pressing it into place.
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Service publications will give measurements for locating the molding or trim properly. Use a pocket rule or measuring tape to mark where the molding or trim should be mounted. Instruct students that if they are reusing adhesive-backed molding or emblems, use aftermarket emblem adhesive. Spread a thin coating of emblem adhesive on the back of the molding or emblem. Then, move the part straight into position without smearing the adhesive. Use masking tape to hold the part in place until the adhesive dries. When molding is held by fasteners, a technician will have to gain access to them. This might involve removing door panels or inner fender aprons.
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Inform students that moldings, ornamentation, and trim have always played a crucial role in highlighting the crowns and style lines on the automobile. Historically these have been made of metal and attached with either a metal or plastic clip or fastener. This method often necessitated drilling holes into the metal to attach the fasteners, which left an area for corrosion to gain a foothold and spread undetected. Securing the attaching hardware frequently required access to the back side of the panel. The attaching hardware also had to fit the shape and configuration of each specific molding. Many times the hardware would break during the removal of the part, making it difficult to reinstall without modifications.
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Instruct students that the preferred method of securing moldings and trim has changed from using the mechanical fasteners described above to the use of double-sided foam tape. The use and placement of the trim accessories has taken on a more diverse and integral function as they are often shaped to conform to the crowns, recesses, and irregular shapes of the surfaces to which they are applied. The double-sided tape holds the molding closer to the surface of the vehicle, reducing the possibility of its becoming snagged and pulled loose. The weight, mass, and often-irregular shapes of these moldings do not lend themselves to being attached with traditional mechanical fasteners. Two-sided foam tape has become a very popular alternative because it is available in various sizes and can be used on virtually any size, shape, or trim configuration. In addition, it is no longer necessary to drill holes into the panels, which eliminates a source of corrosion.
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Teach students that the removal of moldings and trim secured with the two-sided tape is best done with a tool specifically designed for this application. This method cuts through the tape, leaving a clean smooth surface that requires a minimal amount of cleanup prior to installing the replacement part. Removing the molding with this tool also allows the technician to reinstall the same part, either with the aid of a liquid adhesive designed for this particular application or by completely removing the old tape from both surfaces and using fresh tape on the back side of the part. Reinstalling the molding with new tape is the preferred method because the tape is permanently secured the instant it contacts the vehicle's surface. When installing molding with liquid glue, it must be held in place with tape until the adhesive is dry. There is also a possibility that glue will squeeze out and damage the surface next to the molding edge.
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Applications/Practice
Evaluation and feedback Prior to Testing or Lab Work
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Objective 1. / Formative assessment / Instructor will observe students as they practice the procedure to assure correct procedure and safety practices are being followed. A checklist will be utilized to chart student progress on the task. Questioning techniques will be utilized as necessary to demonstrate student comprehension / Adaptations and/or accommodations for special needs students will be added if required.
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STUDENT ASSESSMENT: (Assess student progress with performance criteria.)
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Objective 1 / Summative assessment / written test questions on stated objective / adaptation and / or accommodations for special needs students will be added if required
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IMPACT--Reflection/Analysis of Teaching and Learning: (How did students’ progress in relation to the state objectives? Was the instruction successful? Analyze samples of student work particularly that which is unsatisfactory, for the purpose of planning further instruction.)
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REFINEMENT--Lesson Extension and Follow-up: (To be filled in as the lesson is modified during initial planning and/or during the teaching learning process.)
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