diplomsko delo
Andrej Pavlič (Author), Manja Kitek Kuzman (Reviewer), Mirko Kariž (Mentor)

Abstract

Tehnologije tridimenzionalnega tiskanja omogoča izdelavo tako prototipov, končnih izdelkov kot celotnih objektov. Na podlagi računalniškega modela se z dodajanjem materiala v plasteh tvori izdelek brez dodatnih kalupov. Zaradi številnih prednosti se povečuje uporaba 3D tehnologij in z njim poraba materiala, kateremu bi lahko izboljšali ekološki vidik z dodajnem lesa. Namen naloge je bil pripraviti zmes iz lesnih delcev, mavca in lepila, ki bi omogočala tiskanje z ekstrudiranjem. Zmesem, ki so vsebovale različne deleže lesa, mavca in lepila smo izmerili povprečno silo za ekstrudiranje skozi tiskalno šobo. Z izbranimi zmesmi smo 3D natisnili enostavne preskušance, katerim smo izmerili upogibno trdnost in s testiranjem določili vpliv posameznih komponent na lastnosti materiala. Delež lesa v zmesi je povečeval potrebno silo za iztiskanje, medem ko je večja vsebnost lepila to silo zmanjšala. Najvišjo upogibno trdnost 6,7 N/mm² so dosegli preskušanci narejeni iz zmesi 25 % lepila, 22 % lesnih delcev in 53 % mavca. Dodajanje lepila je povečevalo trdnost, medem ko je imel les nasproten učinek. Delež lesa je vplival tudi na izgubo mase in ukrivljenje preskušancev med utrjevanjem/sušenjem. Zaradi skrčka in posedanja materiala med sušenjem je omejena tudi natančnost končnih izdelkov in je ta material bolj primeren za izdelke z manjšo zahtevano natančnostjo oblike.

Keywords

tridimenzionalno tiskanje;lesni delci;mavec;lepilo;upogibna trdnost;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [A. Pavlič]
UDC: 630*86: 004.356.2
COBISS: 206735107 Link will open in a new window
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Downloads: 129
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Other data

Secondary language: English
Secondary title: Three-dimensional printing with a mixture of wood particles, plaster and glue
Secondary abstract: Three-dimensional printing technologies enable the production of prototypes, finished products, and even entire buildings. By adding material layer by layer, products are formed directly from a computer model without the need for additional moulds. Due to the many advantages of 3D printing, its use is rapidly increasing, along with the consumption of materials. This growth in material usage could be made more sustainable by incorporating wood into the mix. The purpose of this task was to develop a mixture of wood particles, plaster, and glue that would allow for extrusion-based 3D printing. We tested mixtures with different proportions of wood, plaster, and glue, measuring the average force required for extrusion through the printing nozzle. Using the selected mixtures, we 3D printed simple test pieces, measured their bending strength, and assessed the influence of individual components on the material properties. The results showed that increasing the proportion of wood in the mixture raised the force required for extrusion, while a higher glue content reduced this force. The highest flexural strength, 6.7 N/mm², was achieved by specimens made from a mixture containing 25% glue, 22% wood particles, and 53% plaster. While adding glue increased the strength, the addition of wood had the opposite effect. The proportion of wood also affected the mass loss and the bending of the specimens during hardening. Due to shrinkage and material settling during drying, the accuracy of the finished products is limited, making this material more suitable for products with lower shape accuracy requirements.
Secondary keywords: 3D printing;wood particles;plaster;glue;bending strength;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: 1 spletni vir (1 datoteka PDF (VII, 33 str.))
ID: 24956232