National Repository of Grey Literature 30 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Modifikace barvy dubových dýh a její vliv na kvalitu lepení
Rozboril, Tadeáš
This master thesis based on experimental evaluation is focused on colour modification of oak wood veneers and its impact on bonding quality. Experiments were conducted on nanoiron treated oak wood as well as on untreated oak wood. By the experimental means was evaluated influence of treatment on wetting angle, bonding of surface layer and possibilty of impregnation of selected wood veneers in whole volume. Chosen modification didn´t effect selected assembly by loss of bonding quality.
Posouzení kvality lepení u kombinovaných kompozitních materiálů na bázi dřeva
Krejčí, Filip
The aim of the bachelor thesis is to evaluate the bonding quality of wood-based composite materials. Chipboard panels from various manufacturers with representation in the Czech Republic will be selected. In the theoretical part will be briefly described the important parts of the production process and the factors influencing the properties of chipboard. In the practical part will be determined the methodology of the experiment and the subsequent testing to determine the physical and mechanical properties of the selected material. The bachelor's thesis will show tables and charts, which will be evaluated and commented in the end for practical use.
Vizualizace normálového a tečného napětí u lepených spojů
Havránek, Tomáš
This master thesis deal with the glued joint. Teoretical part is focused on basic facts and an advanteges or disadvanteges of this technique. A large part is devoted to theory of gluid process, adhesion, cohesion wettability of glued surfaces. Last part of the theoretical part is searches in the field of tension glued joints and methods to quality assessment of made joint. Experimental testing glued surfaces was made as bend test. During testing was monitored the acoustic emissions. The emissions characterize violation of glued joints. Results of this experiment are evaluated in the end of this thesis.
Návrh technologie výroby zahradního nábytku vlastní koncepce
Malíková, Aneta
The bachelor thesis deals with design and construction of a garden seating element, which is a partly adjustable bench, and a proposal of a possible production technology of the given product. The bench is designed for a covered area, such as a terrace or pergola. The theoretical part of the bachelor thesis focuses on the issue of sitting connected with ergonomics and anthropometry. The following is a chapter on the typology of garden furniture, benches particularly, and a market survey in the area given. Further on, there are chapters on construction joints, material, surface treatments and adhesives used for garden furniture. Last but not least, there is a chapter in the theoretical part about the technology selected for this particular project, using which the chosen garden bench can be manufactured. The practical part deals with a design and a partial realization of the garden seating element. The design is based on an acquired knowledge from the area of typology, construction, and ergonomics of seating furniture. In the opening part, there is a background research. What follows is a sketching, 2D drawing, and 3D modeling which helped to secure the accurate shape of the element. The result of this project is a 3D visualization of the bench, design drawings, assembly instructions and a part of the model in the scale 1:10 and 1: 1, where the design and folding mechanism is demonstrated.
Accelerate handling strength in 2K PUR adhesives
Slatinská, Jana ; Žák, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This paper is devoted to accelerating the time to obtain the handling strength of two-component polyurethane adhesive, which was newly purchased by the company Magna Exterios (Bohemia) and had to be tested. In order to speed up the analysis of the problem, methods of IR emitters and temperature chambers were selected to be compared with curing using only the ambient atmosphere. In the second part of this paper, the maximum strength of the bond which withstand the test without damage was measured. The results show that the method of accelerating curing process using an IR emitter is the fastest, but the economic side of things must be taken into account, because it is also the most expensive option of acceleration. The temperature chamber is almost twice as slower, but cheaper. At the end of the thesis, the economic efficiency of the new adhesive line solution is evaluated and how much money can be ideally saved.
A comparison of different types of epoxy adhesives
Mihulka, Jan ; Žák, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This thesis is focused on a bonding technology. The first part describes the theory of the bonding and it is discussed the main areas of this technology. The experimental part deals with the comparison of four two-component epoxy adhesives in terms of shear strength. For the experiment it had been selected adhesives: Bison Epoxy Universal, Pattex Repair Epoxy Ultra Strong 5 min, Ergo 7430 and Letoxit LH 232. After performing the experiment, it was shown that Bison Epoxy Universal and Pattex Repair Epoxy Ultra Strong 5 min achieved the strengths stated in the datasheet. The strengths of Ergo 7430 and Letoxit LH 232 adhesives was lower than stated in their technological products, thefore, did not meet our expectations. The reason for not achieving the declared strength was probably poor dosing or insufficient mixing of ingredients.
Gluing of plaster casts
Zítková, Petra ; Ďoubal, Jakub ; Tišlová, Renata ; Kokstejnová, Aneta
The aim of the conservation procedure was to create a study which first focused on the evaluation of materials (traditionally used and modern) according to criteria corresponding to the requirements for contemporary conservation procedures. Based on the information and findings of the study, the procedure subsequently recommends the use of a suitable adhesive material and further presents several possibilities of solving the gluing procedures depending on the damage of the works representing the most frequently solved situations in the restoration of plaster casts. The methods and procedures are demonstrated on selected objects made of plaster from the collection of plaster casts by Stanislav Sucharda, where they were used and verified during their restoration.
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Study of the unit load and formation equipment for a material handling
Kadlec, Tomáš ; Malášek, Jiří (referee) ; Kašpárek, Jaroslav (advisor)
The study is focused on handling and forming devices for material handling. The work includes the division and categorization of these devices, including an overview of the devices used in each category. It also deals with an overview of normative requirements with laws concerning storage and molding equipment. A tabular overview is created in the attachment. It is a study analysis that takes the form of an educational study background.
Rationalization of the production line
Straka, Jiří ; Štipčák, Jaroslav (referee) ; Osička, Karel (advisor)
This masters thesis optimises production of the step plates (which are parts of the sliding steps systems used in tramways, subways, hi-speed trains etc.) to increase the production rate to meet customers demand. The purpose of the work was reached by detailed analysis of the production process followed by evaluation of the results which led to the list of the possible solutions. The solution with the greatest time improvement was chosen and explained in detail.
Bonding in the automotive industry
Krejčí, Adam ; Hanáčková, Pavla (referee) ; Kubíček, Jaroslav (advisor)
The thesis presents a literature study of adhesive bonding technology. The work deals with the advantages and disadvantages of adhesive bonding, design of adhesive joints, technological processes of adhesive bonding and the division of adhesives. The thesis also discusses various materials used for the construction of car bodywork and their properties. The main focus of the work is on the use of adhesive bonding in the car industry, comparing traditional and modern technology used for the construction of bus bodywork. In the experimental part of the thesis, the aim is to reveal the influence of surface treatment on the resulting shear strength when employing metal to metal bonding.

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