Course detail
Moulding Materials and Ecology
FSI-PFM Acad. year: 2021/2022 Winter semester
The course gives an integral overview of the properties of moulding materials, sand and binder types, ceramic moulding materials, principles of recycling the moulding mixtures and the application of recycled mixtures. Also dealt with subjects of green sand moulding with a bentonite binder, sodium silicate sands, sand with synthetic resins, hot box and cold box systems, moulding sands with biogenic binders on the base of proteins. For individual technologies their effects on the environment are discussed.
Supervisor
Department
Learning outcomes of the course unit
Students will gain experience in the physical and chemical hardening of moulding sands,and will be made familiar with the problem of the influence of moulding sands on the environment in foundry shops and waste deposits.
Prerequisites
Students are expected to be familiar with following: Basic mineralogy, organic and inorganic chemistry, heat transfer, fluidity and filtration of gaseous media, interaction between melt and foundry mould.
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline. Teaching is suplemented by practical laboratory work.
Assesment methods and criteria linked to learning outcomes
Attendance in lectures is recommended, attendance in exercises is obligatory.
Credit for exercises: semestr project – obligatory
Examination : written and oral exam.
Language of instruction
Czech
Aims
The aim of the course is to familiarise students with chemical and mechanical properties of moulding materials, which will be applied in other courses on technologies. The course will extend the knowledge of basic kinds of binders and sands,as well as principles of recycled waste sands.
Specification of controlled education, way of implementation and compensation for absences
Attendance at laboratory seminars is compulsory. Absence from 3 seminars may be compensated for.
The study programmes with the given course
Programme N-SLE-P: Foundry Technology, Master's
branch ---: no specialisation, 7 credits, compulsory
Type of course unit
Lecture
39 hours, optionally
Teacher / Lecturer
Syllabus
Properties of moulding sands
Dispersal of sands grains
Moulding sands with clay binders
Cement sands
Ceramic sands
Plaster sands
Moulding sands with sodium silicates
Moulding sands with resin binders
Moulding sands with oil bindres
Moulding sands with polysacharides
Coating materials for moulds and cores
Recycling of moulding sands
Safety and working condition with moulding materials
Laboratory exercise
26 hours, compulsory
Teacher / Lecturer
Syllabus
The way of a grain size determination,integral curve of grains, Stokes law, etc. Testing of bentonite sands – green sands properties, compactibility properties, influenced bentonite sands after contacts with fluid metals. Technological properties of sodium silicate sands, CO2 process, Ester hardening process, dicalcium silicate process, FeSi process. Plasters moulding sands for Art casings. Polycondensation of urea-formaldehyde resins in acid environment, selfhardening furane sands, Cold Box system catalysed with di/triethylamine,interaction on the interface mould/metal.