618-2034/01 – Theory and Technology of Metalcasting (TTSUS)
| Gurantor department | Department of Metallurgy and Foundry | Credits | 6 |
| Subject guarantor | doc. Ing. Petr Lichý, Ph.D. | Subject version guarantor | doc. Ing. Petr Lichý, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | summer |
| | Study language | Czech |
| Year of introduction | 2014/2015 | Year of cancellation | 2020/2021 |
| Intended for the faculties | FMT | Intended for study types | Bachelor |
Subject aims expressed by acquired skills and competences
Acquired knowledge
- Student will be able to analyse and compare basic methods of mold and core making
- Student will be able to describe basic processes during forming a casting from pouring it up to metal cooling
Acquired skills
- Student will be able to explain the formation of the most important casting defects
- Student will be able to design a technological process of making an art casting (a mold, a gating system, venting).
Teaching methods
Lectures
Individual consultations
Tutorials
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:
Recommended literature:
Way of continuous check of knowledge in the course of semester
E-learning
http://www.fmmi.vsb.cz/cs/urceno-pro/studenty/podklady-ke-studiu/studijni-opory
Other requirements
Elaboration of semestral project
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1. History and the present of the foundry industry
2. Procedures of casting production description of individual production units, 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 molding – 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 melted metals, their dissolubility, methods of the melt degasing. Gases in the mold, methods of the mold degasing, vent holes. Blow hole formation.
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
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction