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1.
PRIMERJAVA POSTOPKOV SELEKTIVNEGA LASERSKEGA SINTRANJA IN BRIZGANJA PLASTIČNIH MAS PRI IZDELAVI KONČNIH IZDELKOV
Žiga Kadivnik, 2010, bachelor thesis/paper

Abstract: V diplomskem delu je predstavljena primerjava med tehnologijama brizganja plastičnih mas in selektivnega laserskega sintranja za izdelavo malo serijskih izdelkov. Za obe tehnologiji so opisani vsi procesi, ki so potrebni za nastanek končnega produkta. Na podlagi tega je izvedena časovna analiza in stroškovna kalkulacija proizvodnje plastičnih izdelkov. Primerjava obeh postopkov iz časovnega in ekonomskega vidika prikazuje mejo ustreznosti izdelovalnega postopka glede na velikost serije, izbranega primera izdelka. Rezultat študije prikazuje, da primernost selektivnega laserskega sintranja narašča s kompleksnostjo izdelka in pada z večanjem števila izdelkov v seriji.
Keywords: dodajalne tehnologije, selektivno lasersko sintranje, brizganje plastičnih mas, proizvodne tehnologije
Published: 11.10.2010; Views: 2276; Downloads: 223
.pdf Full text (4,14 MB)

2.
Processing poly(ether etherketone) an a 3D printer for thermoplastic modelling
Bogdan Valentan, Žiga Kadivnik, Tomaž Brajlih, Andy Anderson, Igor Drstvenšek, 2013, original scientific article

Abstract: PEEK, poly(ether etherketone), is one of the high-quality industrial polymers. It is widely used in extremely demanding areas like automotive, aircraft and space industries. Because of the fact that it is bio-compatible, PEEK is also used for medical implants that are usually made by milling a block of the material. The article presents the results of an investigation of processing PEEK on a 3D printer for thermoplastic modelling. The used procedure is one of the additive manufacturing procedures and, as such, it builds a product by adding material layer by layer to get the finished product. Commercially available machines are unable to achieve the required melting and environment temperatures, so a new machine was developed. The machine was designed and built at the company Ortotip d.o.o. and it is able to produce the parts of up to 130 mm Ž 130 mm Ž 150 mm. After the initial testing, test specimens, according to standards EN ISO 527-2: 2012 and EN ISO 178: 2011, were produced and tested at the facilities of the PEEK manufacturer Invibio (from the UK). The article presents the steps taken when developing the PEEK modelling machine, the test methods to verify the mechanical properties of manufactured products and the results of the material testing. The machine was developed to produce medical implants (specific maxillofacial prosthesis), but with additional testing (that will help to improve the mechanical properties of produced parts) practically all bone-replacement implants can be made.
Keywords: PEEK, 3D printer, implant, medical application, thermoplastic, FDM, biocompatible, additive technology
Published: 17.03.2017; Views: 773; Downloads: 57
.pdf Full text (2,10 MB)
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3.
Transport poliamidnega prahu za selektivno lasersko sintranje s podtlačnim sesalnim sistemom
Žiga Kadivnik, 2019, master's thesis

Abstract: Predstavljene so obstoječe rešitve sejanja poliamidnega prahu za selektivno lasersko sintranje. Mednje spada sejanje z odsesovalno napravo, pri kateri prihaja do pogostih odpovedi komponent ležajnega sistema zaradi drobne granulacije prahu. Na podlagi eksperimentalne analize odsesovalne naprave, konstruiranja in izvedbi numeričnih analiz različnih podtlačnih sesalnih sistemov, je zasnovan način transporta poliamidnega prahu v zračnem toku po vakuumskem principu. Rezultati numeričnih analiz so potrjeni z izdelavo in eksperimentalno analizo funkcionalnega prototipa ejektorskega sistema. Študija pokaže slabši sesalni efekt odsesovalne naprave z uporabo ejektorja. Ejektorski sistem v kombinaciji z odsesovalno napravo ne ustvari dovolj podtlaka za učinkovito sesanje delcev prahu.
Keywords: selektivno lasersko sintranje, poliamid, podtlačni sesalni sistem, ejektor, ejektorski sistem
Published: 11.11.2019; Views: 111; Downloads: 18
.pdf Full text (2,34 MB)

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