Stroj za rezanje sirove gume

Gašparović, Sven (2014) Stroj za rezanje sirove gume. = Undergraduate thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Štorga, Mario.

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Abstract (Croatian)

Guma je mekani materijal izrazitih elastičnih svojstava. Iz otg se razloga guma već stoljećima koristi za izradu dijelova za ostvarivanje mekog kontakta između tvrdih površina i prigušivanje vibracija. Nekad se guma dobivala isključivo iz kaučukova drveta. U počecima je industrija za proizvodnju gume bila orijentirana isključivo na maloserijsku proizvodnju, no pojavom autoindustrije dolazi do naglog razvitka i prelaska na masovnu proizvodnju. Proces proizvodnje gume je poznat i moguće ga je šablonski izvoditi pa ga je moguće relativno lako automatizirati. S tim ciljem će u ovom radu biti prikazan jedan takav uređaj, koji služi za odmatanje gume i njezino rezanje na manje komade za potrebe automobilske industrije.

Abstract

Rubber is a soft elastic material. Therefore it is widely used for various of applications during a long period of time, especially for maintaining soft contact between hard surfaces and muffling vibrations. At first rubber was being extracted only from India rubber. As the tachnology raised natural rubber was being replaced with artificial. Today are most commonly used various synthetic compounds whose chemical structure differs extremely compared to the natural rubbers, but because of theirs properties they are also classified as rubbers. At its beginning rubber production industry was focused on a low-rate initial production. Rubbers elastic properties were very satisfying, although its mechanical and aging properties were terrible. Poor mechanical properties would most frequently appear in conditions of high operating temperature. As the vulcanisation proccess was revealed all these lacks were overridden. The real turning point for rubber production industry represented James Boyd Dunlops invention of a tyre. He noticed that a rubber hose filled with pressurized air and coated with thick rubber coating is capable of absorbing great amount of vibrations, that appear during a straight drive on a rough ground. He patented his invention under its well known name „tyre“ and momentarily began with its production. Dunlop initiated serial tyre production, but at the start of 20th century happened the main event that lead to the global expansion of a rubber prodution industry. As the automotive industry expended requests on tyre production industry raised rapidly, therefore causing it to force a large-scale production. An appearence of a conveyor belt in the USA determined the beginning of a large-scale tyre production. Today is the automotive industry the greatest rubber-consumer in the world. Materials in tyre production have enormously changed from the beginning of a massive tyre production, but the proccess of tyre production it self remained almost the same as before. Rubber coiled on a standard dimension rolls is deployed to a tyre repair facilities, where it is uncoiled, cut on strips and eventually sticked into a round shape. The sticking proccess is called vulcanisation. The proccess consists of placing strips in layers around a cylindrical base, melting of liquified rubber under high temperatures in furnaces and cooling on room temperture forming a round shape of a tyre. The proccess of rubber production is already being used for tens of years, but today there is a large request on automating it. Placing strips in layers around a cylindrical base is still quite complicated to automate, but the proccess of rubber uncoiling from its roll and cutting it on smaller pieces can be performed with today available technologies. In this work will be designed such a device, whereas special concern will be taken in analising the market state. The construction goals will be determined based on market analisation and the adequate concepts will be derived uniting the most quality characteristics of particulary devices available on market complemented with own ideas and solutions.

Item Type: Thesis (Undergraduate thesis)
Uncontrolled Keywords: stroj; rezanje; guma
Divisions: 100 Department of Design > 110 Chair of Design
Date Deposited: 22 Sep 2014 18:00
Last Modified: 16 Oct 2015 12:46
URI: http://repozitorij.fsb.hr/id/eprint/2681

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