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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Koncept på kylstation i tubfyllningsmaskin

Olows, Håkan, Kadiric, Armin January 2019 (has links)
Arbetet utfördes vid Norden Machinery i Kalmar. Norden Machinery blev år 1979 ett själv- ständigt bolag och är idag en världsledande leverantör av högpresterande tubfyllningsmaskiner. Processen i maskinerna är helautomatiserad och behandlar främst tuber av olika plastlaminat. I processen fylls tuben med sitt innehåll och överkanten värms sedan upp tillräckligt mycket för att den delvis smälta plasten ska kunna pressas samman och därmed försluta tuben. Innan överflödig plast i toppen på tuberna slutligen klipps till behöver tuberna kylas ner tillräckligt mycket för att inte lämna en dålig klippning. Norden Machinery vill idag se över kylstationens prestanda samt jämföra den mot alternativa lösningar. Syftet med arbetet var att genom teoretiska och praktiska utredningar undersöka olika koncept för att kyla tuberna före klippstationen. Prestandakriterier som utvärderades var kylförmåga, kostnad för ingående detaljer, förbrukning av tryckluft samt ljudnivå. En fördjupning i Nordens nuvarande lösning gjordes genom att mäta temperaturer på tubens överkant före och efter de olika stationerna i tubfyllningsmaskinen. Arbetet följde sedan en konceptgenereringsprocess där ett antal koncept skapades, testades och utvärderades med avseende på de uppsatta prestandakriterierna. De koncept som togs fram begränsades till att ersätta den del i tubfyllningsmaskinen som idag fungerar som kylstation. Ett framtaget koncept som tillsätter vattendimma till den kylande tryckluften visade sig genom mätningar kunna förbättra den kylande prestandan med närmare 15 % vid 25 % lägre luftflöde. Även ljudnivån påverkades positivt. Lösningen är mer komplex än nuvarande, och kräver vidare utvecklingsarbete, men har potential att klara särskilt krävande tuber som idag inte kan kylas tillräckligt effektivt. Ett slutligt koncept som likt dagens lösning kyler med tryckluft presenterades. Istället för runda utloppshål för luften används rektangulära spalter. Med den nya kylprofilen kan tillverknings- kostnaden reduceras med närmare 45 %, framförallt genom att färre moment och verktygsbyten krävs vid tillverkningen. / This work was conducted at Norden Machinery in Kalmar. Norden Machinery became an independent company in 1979 and is today a world-leading supplier of high-performance tube filling machines. The process in the machines is fully automated and handles mainly various types of laminated plastic tubes. In the process, the tube is filled with its content, the top of the tube is heated to partially melt the plastic and the top is then pressed together in order to seal the tube. Before any excess plastic at the top of the tubes is cut in the final step, the tubes need to cool down enough to not leave a bad cut. Norden Machinery wants to examine their current cooling station and further compare it with alternative solutions. The purpose of the work was that through theoretical and practical investigations examine different concepts of cooling. Performance criteria to be evaluated were cooling ability, cost of manufacturing, consumption of compressed air and noise level. Norden’s present solution was examined by temperature measurements at the top of the tube before and after the different stations in the tube filling machine. A concept generation process then followed, where a number of concepts were created, tested and evaluated with regard to the performance criteria. The concepts generated were limited to replacing the part of the tube filling machine that today serves as a cooling station. A generated concept that adds water mist to the compressed airflow could by measurements be demonstrated to increase the cooling performance by nearly 15 % at 25 % less airflow. The noise level was also positively affected. The solution is more complex than the current, and further development is needed, but the concept has the potential to cope with particularly demanding tubes that today cannot be cooled sufficiently. A final concept was presented, in which similar to the current solution compressed air is used for cooling the tube. Rectangular air outlets are used instead of round holes. With the new cooling profile, manufacturing costs can be reduced by close to 45%, mainly due to fewer operations and tool changes during the manufacturing.
2

Study Of Belts Acting As A Positioning System For Interconnected Gripping Tools In Tube Filling Machines / Studie av remmar verkande som positioneringssystem till sammanlänkade gripvertyg hos tubfyllingsmaskiner

Hohner, Robin, André, Ekengren January 2018 (has links)
The task performed in this assignment is to improve the reliability of Norden Machinery ABs product family. This is to be done by examining and replacing the belt used to stop the spreading of tubes from ingoing shipping crate to the infeed of the machine. The way that this was approached was by testing different candidates on a spectrum of their rigidity to find if a flexible or more rigid belt would perform better than the current context of the system. The testing was conducted for a period of 4 weeks and results were gathered by examining damages to the belts by the use of microscope. After the damage had been analyzed the conclusion was drawn that flexible alternatives seems to perform the task better than their rigid counterparts however more work is needed in the fields regarding the fastening and operation of the machine to use the best suited candidates derived from this test, the monolithic belt FMT-02TXCT-U1.

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