Vpliv velikosti iverja in načina segrevanja na hrapavost ivernih plošč

diplomsko delo (visokošolski strokovni študij)

Peter Luin (Avtor), Bojan Bučar (Recenzent), Sergej Medved (Mentor)

Povzetek

Raziskovali smo vpliv velikosti iverja na hrapavost površine ivernih plošč. Za izdelavo plošč smo uporabili iverje iz smrekovega lesa; dobili smo ga iz tovarne ivernih plošč Lesna, Otiški vrh. Iverje smo presejali v 2 različni frakciji: en del grobe frakcije smo dodatno pomleli, drugega pa termično obdelali in z mokrim pomlevanjem pridobili vlakna. Izdelali smo 3 tipe ivernih plošč in iverno ploščo obdano z vlaknastim slojem ter zanje uporabili različno fino iverje oz. vlakna. Za merjenje hrapavosti površine smo izdelali napravo: ta nam je omogočila daljši zajem profila površine. Ploščam smo tako izmerili hrapavost in gostotne profile po prerezu ter dobljene rezultate primerjali med seboj. Ugotovili smo, da je hrapavost površine ivernih in iverno-vlaknenih plošč odvisna od prostorninske mase površinskega sloja. Večja kot je prostorninska masa površinskega sloja, manjša je hrapavost površine plošč; hrapavost površine na spodnji strani plošč pa manjša kot na zgornji. Razlika v hrapavosti nastane zaradi usipanja iveri proti dnu med natresanjem in prenosom pogače do stiskalnice: spodnja stran plošče tako vsebuje večjo količino finejšega iverja.

Ključne besede

iverne plošče;vlaknene plošče;iverje;vlakna;gostotni profil;površina;hrapavost;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2006
Izvor:	Ljubljana
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL BF - Biotehniška fakulteta
Založnik:	[P. Luin]
UDK:	630*862.3
COBISS:	1461641
Št. ogledov:	1350
Št. prenosov:	252
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Influence of particle sizes and heating on particle board roughness
Sekundarni povzetek:	Influence of particle sizes on roughness of particle board surface was researched. To make particle boards pinewood particles received from Lesna, Otiški vrh, were used. The particles were sifted to 2 different fractions, one part of them was ground additionally, the other thermically treated. Using the procedure of wet grinding fibers were produced. 3 different types of particle boards and one particle board with an external layer were made. Various particle sizes or fibers were used for each board type and the particle board with external layer made from fibers. To measure the surface roughness a device measuring a longer surface roughness capture was made. In this way the surface roughness and density profiles of particle boards were measured and compared. It was found out that the surface roughness depends on the density of particles and fiber boards. The higher the density of the surface layer the smaller the surface roughness of boards. Surface roughness is smaller on the bottom side of particles and fiber boards than on the upper one. The difference is caused by the pouring of particles to the bottom during the particle board forming and transferring to the press. The bottom side of particle boards has higher quantity of small size particles.
Sekundarne ključne besede:	particle board;fiber board;particle;fiber;desity;profile;surface;roughness;
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Diplomsko delo, Univ. v Ljubljani, Biotehniška fakulteta, Oddelek za lesarstvo
Strani:	XIII, 63 f., [25 f. pril.]
Ključne besede (UDK):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;agriculture and related sciences and techniques;forestry;farming;wildlife exploitation;kmetijstvo ter sorodne vede in tehnologije;forestry;gozdarstvo;forest products and their utilization;gozdni proizvodi in njihova uporaba;
ID:	21049