618-1470/01 – Theory and Technology of Metalcasting (TTUS)
| Gurantor department | Department of Metallurgy and Foundry | Credits | 6 |
| Subject guarantor | doc. Ing. Vlasta Bednářová, CSc. | Subject version guarantor | doc. Ing. Vlasta Bednářová, CSc. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | summer |
| | Study language | Czech |
| Year of introduction | 2012/2013 | Year of cancellation | 2020/2021 |
| Intended for the faculties | FMT | Intended for study types | Bachelor |
Subject aims expressed by acquired skills and competences
student will be able:
-to analyse and compare basic methods of mould- and core-making;
-to describe basic processes during forming a casting from pouring it up to metal cooling;
-to explain the formation of the most important casting defects;
-to design a technological process of making an art casting (a mould, a gating system, venting).
Teaching methods
Lectures
Seminars
Tutorials
Experimental work in labs
Summary
Casting as a product of the foundry industry, possibilities and limits, engineering and technologic requirements. Mode of castings production from the design to finishing. Wood and metal patterns making. Molding materials, sand, binders, mold and core making technologies. Specialities of art castings manufacturing.
Compulsory literature:
Schieg,F.P. : Technology of Metalcasting. American Foundry Society,Des
Plaines,IL 2003.
YOUNG,R.,D.;FENNELL,R.A. : Methods for modern sculptors. Sculpt Nouveau,Escondino,CA,2000
Recommended literature:
Articles in professional journals, papers of conferences.
Way of continuous check of knowledge in the course of semester
1 classified test report
2 classified programs
1 classified semestral paper and its defence
E-learning
address where pedagogs could be contacted
: http://staff.vsb.cz/
Other requirements
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Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
English
1. History and the present of the foundry industry
2. Procedure of casting production from a design to the dispatch department, Production of castings using permanent metal mold and lost sand mold
3. Pattern making, materials, parting lines, scarfs, working allowance, core boxes, materials. Metal molds, sand molds
4. Molding wih split pattern, cores using, sweep moulding – rotating and plane, hand and mechanized sand molding. Precision casting with lost wax pattern, Lost Foam, V-process
5. Production of castings using permanent metal mold, gravity casting, high and low pressure die casting, centrifugal casting. Melt fluidity and castability
6. Running system design depending on the type of poured metal. Running systems for art castings. Running system calculation.Calculation of metalostatic pressure and buoyancy .
7. Gases in metals and molds
8. Castings crystallization and solidification.Thermodynamic conditions of crystallization. Solidification time, shape of castig and mould material, thermal diffusivity of the mould
9. Solidification shrinkage and its consequence – shrinkage cavities, porosities – causes and prevention
10. Hot spots – facing their consequences, directional solidification , feeding, calculation of the riser volume
11. Linear contraction of the casting, hot tearing, cold cracking, residual stresses
12. General design of metal casting production, rapid prototyping. Methods of castings finnishing
13. Art casting manufacturing
14. Terminal consultation
Practices:
1. Art casting principles video
2. Refractory materials for mold and core making, silica and non silica sands, organic and inorganic binders
3. Molding mixtures making and testing -– test report
4. Mold and core making technologies, practical demonstration,
5. Making of simple mold and core and pouring the own casting
6. Video presentation of different foundry technologies
7. Casting design, axonometric drawing
8. Visit of foundry and its pattern shop
9. Casting designing- parting line, scarfs, working allowance
10. Calculation of metalostatic pressure and buoyancy
11. Running system design and calculation (program)
12. Calculation of the riser volume ( program)
13. Rapid prototyping , computer simulations
14. Final seminary, defence of semestral papers
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction