Učinkovitost laserskega odstranjevanja premazov s površine lesa

diplomsko delo

Maša Košmerl (Author), Miha Humar (Reviewer), Matjaž Pavlič (Mentor), Matija Jezeršek (Co-mentor)

Abstract

Diplomsko delo raziskuje uporabo UV, IR in CO2 laserjev za odstranjevanje utrjenih filmov različnih premazov s površin bukovega in hrastovega lesa. Cilj naloge je bil poiskati ustrezne parametre za učinkovito odstranjevanje premazov in s pomočjo analize z digitalnim ter konfokalnim mikroskopom oceniti kakovost površine lesa po laserski obdelavi. Rezultati so pokazali, da je izbira laserja, njegove moči in števila prehodov ključna za uspešno odstranitev premazov ob zagotavljanju ustrezne kakovosti podlage za njeno nadaljnjo obdelavo po odstranitvi. UV laser je omogočil natančnejše odstranjevanje premazov brez večjih poškodb lesne podlage. IR laser se je izkazal kot manj učinkovit pri odstranjevanju transparentnih premazov, medtem ko je pri črno pigmentiranem pokazal učinkovitost že pri nizkih močeh. CO2 laser je bil učinkovit pri odstranjevanju večine premazov, vendar je pri tem bolj povzročal lokalne ožganine podlage. Lasersko odstranjevanje premazov s površin bukovega lesa je bilo bolj učinkovito, površina lesa po odstranitvi premaza pa je bila tudi bolj gladka. Prav tako smo dokazali, da na učinkovitost odstranjevanja filmov laka pomembno vpliva tudi vrsta premaza oz. premaznega sistema. Transparentni poliuretanski premaz na organski osnovi se je enakomerneje odstranjeval s površine lesa kot akrilni na vodni osnovi. Izsledki raziskave predstavljajo pomembno osnovo za nadaljnjo optimizacijo procesov laserskega odstranjevanja premazov.

Keywords

les;premaz;laser;odstranjevanje;

Data

Language:	Slovenian
Year of publishing:	2024
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[M. Košmerl]
UDC:	630*829.1
COBISS:	207578115
Views:	33
Downloads:	17
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Efficiency of the laser removal of coatings from the surface of wood
Secondary abstract:	This thesis investigates the use of UV, IR and CO2 lasers to remove dry films of various coatings from the surface of beech and oak wood. The aim of the study was to find suitable parameters for the effective removal of coatings and to evaluate the quality of the wood surface after laser treatment using digital and confocal microscopic analyses. The results showed that the choice of laser, its power and the number of passes is key to successfully removing coatings while ensuring adequate quality of the substrate for further processing after removal. With the UV laser, the coatings could be removed more precisely without damaging the wood substrate. The IR laser proved to be less effective in removing transparent coatings, while it was effective on black pigmented coating even at low power. The CO2 laser was able to remove most coatings but was more likely to cause localized burns on the substrate. Laser removal of coatings on beech wood was more effective, and the surface of the wood was smoother after the coating was removed. We were also able to prove that the type of coating or coating system also has an influence on the efficiency of the laser coating removal. The transparent solvent-borne transparent polyurethane coating was removed more evenly from the wood surface than the water-borne acrylic coating. The research results form an important basis for the further optimization of the laser coating removal process.
Secondary keywords:	wood;coating;laser;removing;
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 (X, 64 str.))
ID:	25059893