Foundry Technology Course

Lesson 1 • Foundry Safety and Environmental Basics

Introduces hazard identification, personal protective equipment, and environmental controls specific to foundry operations. Establishes safe-practice habits before hands-on work begins.

Lesson 2 • History and Scope of Foundry Industry

Traces casting from ancient metallurgy to modern automated foundries. Establishes industry context and motivates study of subsequent technical chapters.

Lesson 3 • Classification of Casting Processes

Categorizes processes by mold type, metal type, and production volume. Provides a decision framework referenced in every subsequent process chapter.

Lesson 1 • Non-Ferrous Casting Alloys

Examines aluminum, copper, zinc, magnesium, and nickel-based alloys used in casting. Connects alloy properties to process compatibility and end-use performance.

Lesson 2 • Solidification Principles

Explains nucleation, grain growth, segregation, and shrinkage during solidification. These principles directly inform riser and gating design covered in later chapters.

Lesson 3 • Ferrous Casting Alloys

Covers gray iron, ductile iron, white iron, malleable iron, and cast steel compositions and properties. Links alloy choice to mechanical performance requirements.

Lesson 4 • Melt Quality and Charge Calculation

Addresses charge composition, melt cleanliness, degassing, and inoculation practices. Directly prepares students for melting operations in the next chapter.

Lesson 1 • Melt Treatment and Pouring Practice

Covers fluxing, deslagging, ladle treatment, and controlled pouring to maintain metal quality. Connects melt preparation directly to mold filling and solidification outcomes.

Lesson 2 • Temperature Measurement and Control

Teaches thermocouple, optical pyrometer, and immersion probe use for accurate melt temperature monitoring. Precise temperature control prevents casting defects and alloy degradation.

Lesson 3 • Electric Induction Furnaces

Covers coreless and channel induction furnace design, power control, and refractory lining management. Induction furnaces dominate modern foundries and require precise electrical and thermal control.

Lesson 4 • Electric Arc and Reverberatory Furnaces

Explains arc furnace steelmaking and reverberatory furnace use for non-ferrous alloys. Broadens students' equipment repertoire beyond iron-focused furnaces.

Lesson 1 • Pattern Types and Materials

Classifies single-piece, split, match-plate, and cope-and-drag patterns and their material options. Material choice affects pattern life, dimensional accuracy, and production cost.

Lesson 2 • Pattern Inspection and Maintenance

Establishes dimensional inspection protocols and repair procedures to sustain pattern accuracy over production runs. Maintained patterns reduce casting scrap and rework costs.

Lesson 3 • Pattern Fabrication Techniques

Covers hand fabrication, CNC machining, and rapid prototyping methods for pattern production. Modern fabrication methods reduce lead time and improve dimensional repeatability.

Lesson 4 • Core Prints and Core Box Design

Explains core print geometry, clearances, and core box construction for producing internal cavities. Core print accuracy directly controls core positioning and casting wall thickness.

Lesson 1 • Mold Assembly and Closing

Covers core setting, mold alignment, clamping, and weighting to prevent mold shift and metal runout. Proper assembly directly determines casting dimensional accuracy and safety.

Lesson 2 • Green Sand Molding

Covers silica sand, clay binder, moisture, and additives that constitute green sand and their effect on mold properties. Green sand is the most widely used molding medium in ferrous foundries.

Lesson 3 • Shell Molding and Precision Processes

Details shell molding with resin-coated sand, investment casting mold preparation, and ceramic shell building. These processes achieve superior surface finish and dimensional tolerance.

Lesson 4 • Sand Testing and Control

Teaches AFS grain fineness, compressive strength, permeability, and moisture tests for sand quality control. Consistent sand properties are essential for repeatable casting dimensions and surface finish.

Lesson 1 • Core Venting and Coating

Explains vent placement, wax vents, and refractory coating application to control gas evolution and improve surface finish. Inadequate venting causes gas porosity defects in castings.

Lesson 2 • Core Assembly and Handling

Addresses core assembly with adhesives, chaplets, and support fixtures to maintain position during pouring. Proper handling prevents core breakage and dimensional shift.

Lesson 3 • Core Quality Testing

Applies tensile, compressive, and gas evolution tests to verify core quality before mold assembly. Test results guide binder ratio adjustments and process corrections.

Lesson 4 • Core Sand Binder Systems

Compares oil-baked, cold-box, hot-box, and inorganic binder systems for core production. Binder selection governs core strength, collapsibility, and gas generation during pouring.

Lesson 1 • Solidification Simulation Basics

Introduces casting simulation software to predict hot spots, shrinkage, and fill patterns before tooling is made. Simulation reduces costly trial-and-error in gating and riser design.

Lesson 2 • Gating and Riser Optimization

Integrates simulation feedback with yield calculations to minimize metal usage while maintaining casting soundness. Optimization balances quality, yield, and production cost.

Lesson 3 • Gating System Components and Design

Defines pouring cup, sprue, runner, and ingate geometry and their roles in controlling metal flow. Correct component proportions minimize turbulence, air entrainment, and oxide inclusion.

Lesson 4 • Riser Design and Feeding Principles

Covers Chvorinov's rule, modulus method, and feeding distance to size risers that compensate for solidification shrinkage. Proper risering eliminates internal porosity in critical casting sections.

Lesson 1 • Statistical Process Control in Foundries

Applies control charts, process capability indices, and sampling plans to monitor and control casting quality. SPC converts reactive defect response into proactive process management.

Lesson 2 • Destructive Testing and Metallography

Applies tensile, hardness, impact, and metallographic analysis to verify mechanical properties and microstructure. Destructive tests confirm that alloy and process targets have been met.

Lesson 3 • Classification of Casting Defects

Categorizes defects as shrinkage, gas, sand, cold shut, misrun, and inclusion types with root causes. A structured defect taxonomy enables faster diagnosis and corrective action.

Lesson 4 • Non-Destructive Testing Methods

Covers visual, dye penetrant, magnetic particle, radiographic, and ultrasonic inspection for casting evaluation. NDT methods detect internal and surface defects without destroying the casting.