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Explain common plastics and the injection molding process
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner completes the plastics cross reference worksheet
when the learner completes the slide calculations worksheet
when the learner can pass the written evaluation
Criteria
learner summarizes the word plastics
learner discusses the history of plastics
learner explains the injection molding processes
learner explains the difference between thermosetting and thermoplastics materials
learner identifies some common plastics and their properties
learner cross references common plastics and their trade names
learner compares plunger and reciprocating screw injection molding machines
learner explains a three plate mold
learner explains the principle of hot runner systems
learner explains the principles of slides
learner explains the slide construction features
learner performs calculations for proper slide operation
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Explain mold life, the steels used, and heat treatment of these steels in mold making
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner passes the written evaluation
Criteria
learner summarizes what is mold life
learner identifies steels used in plastic molding
learner identifies steels used for die casting
learner explains the advantage of using prehardened steels
learner explains the following heat treatment processes: normalizing, annealing, stress relieving , hardening, tempering, cyaniding, carburizing, and nitriding
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Identify mold components
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner can sketch the basic ejector system
when the learner can pass the written evaluation
Criteria
learner identifies standard mold components
learner explains the six methods of mounting/retaining of cavity and core inserts
learner identifies two methods of preventing round inserts from rotating
learner explains a conventional ejector system
learner determines ejector pin location relative to core
learner explains the function of ejector blades and sleeves
learner explains the purpose of guide pins and bushings in ejector mechanisms
learner explains the function of cam blocks
learner explains the purpose of stripper plates and rings
learner explains the action of a top ejection unit
learner explains the differences between an integral and loaded insert
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Utilize industrial catalogs to select standard components for purchase
Assessment Strategies
in the MATC classroom
when the learner completes the DME catalog worksheet
when the learner completes the worksheet for sketching and dimensioning the following components:sprue bushing, locating ring, ejector pins, ejector sleeve, leader pins, and bushings
Criteria
learner explains the economics of standardization
learner identifies the DME steel numbering system
learner explains the DME catalog numbering system for components
learner uses the numbering system to order a mold
learner compares the A and AR series mold bases
learner compares the A and B series mold bases
learner compares mold bases for zinc and aluminum die casting
learner explains the difference between C and CX core pins
learner explains the design of ejector sleeves
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Compare the different methods of heating and cooling molds
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner can sketch the basic heating and cooling system
when the learner can pass the written evaluation
Criteria
learner identifies the primary means of heating and cooling molds
learner compares common mold heating and cooling patterns
learner explains the use of baffles and bubblers in the cooling system
learner explains the use of O rings
learner explains the use of diverting plugs
learner explains construction for plugs and quick disconnects
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Examine different runner and gate designs
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner can pass the written evaluation
Criteria
learner explains the purpose of a runner system
learner compares runner cross-sectional shape with plastic flow
learner explains the properties of a well designed gate pattern
learner identifies the cause of a weld line
learner explains a balanced runner system
learner explains the function of a cold slug well
learner explores the application of the different gating designs
learner explains the purpose of venting
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Summarize the methods of producing cores, cavities and mold bases
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner can sketch the basic heating and cooling system
when the learner can pass the written evaluation
when the learner can sketch and dimension cavity insert rounds
when the learner completes the EDM electrode worksheet
when the learner can pass the written evaluation
Criteria
learner explains the principles of duplicating machines
learner explains the hobbing process
learner explains the pressure casting process
learner explains the EDM process
learner identifies the AISI number for the types of steels used in the production of mold bases
learner explains the advantages of the flame cutting process
learner explains the purpose of rough machining
learner summarizes the process of drilling, boring and reaming leader or guide pin holes
learner explains the process of transferring ejector pin holes
learner explains the function of support pillars
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Demonstrate the polishing of molds
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner can pass the written evaluation
Criteria
learner explains why polishing is necessary
learner explains polishing methods and processes
learner determines the proper surface finish for a hob
learner qualifies specific finishes for certain materials
learner explains polishing relative to parting lines, slots,and runners
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Develop sketches for canned mold/project
Assessment Strategies
in the MATC Classroom
with canned mold A and B plate geometries
with CAD/CAM software and a computer
by end of the semester
Criteria
learner chooses a plastic part to produce
learner generates a plastic piece part print
learner modifies A and B plate drawings to accommodate his/her part
learner generates the ejector system drawing
learner dimensions drawings
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Compare thermoforming, expansion, extrusion, and blow molding
Assessment Strategies
in the MATC classroom
when the learner can pass the written evaluation
Criteria
learner explains the principles of thermoforming
learner explains the principles of expansion molding
learner explains the principles of extrusion molding
learner explains the principles of blow molding
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Explain rubber molding
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner can pass the written evaluation
Criteria
learner explains the principles of rubber molding
learner explains the two different types of rubber molds
learner explains the construction features of rubber molds
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Explain zinc and aluminum die casting
Assessment Strategies
when the learner completes assigned questions from text
in the MATC classroom
when the learner can pass the written evaluation
Criteria
learner explains the principles of zinc die casting
learner explains the principles of aluminum die casting
learner explains the construction features of zinc die casting
learner explains the construction features of aluminum die casting
learner explains the principles of push through and compound trim dies
learner explains the construction features of trim dies
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Explain the mold press set up and operation
Assessment Strategies
in the MATC molding lab
with the Cincinnati molding machine and manual
with with the necessary tools and supplies
with the assistance of the instructor
Criteria
learner attends mold setup and operation demonstration
learner associates safety precautions, attitudes, and actions for proper working conditions
learner properly installs mold and clamps
learner operates the control to setup the mold clamp, pressures, shot size, time, etc
learner cycles the molding press to produce their part
learner properly shuts down the machine