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Measuring the availability at the sawmill and the capacity at the planing mill at SCA Timber Rundvik sawmill
2009 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This master thesis was done at SCA Rundvik sawmill. Rundvik sawmill belongs to SCA group. It is produced 231,000 m³ and with the share of developed timber is 61 %. One of two goals with this master thesis is to measure the availability at the sawmill more detailed. It means to start to count a stop as a downtime in the production after 10 seconds instead of 1 minute. And it is to make more stop codes over the sawline to show the sections where the stops appear often. It was not done any analyzes of the stops reasons or made any suggestions how to avoid them. The conclusion does not give any solutions how to increase the availability. The measuring time was 127 hours and the availability gotten during the measuring is 65%. Stops were started to be registered after 10 seconds since they occurred. The sorting of the stops were done. Stops from 10 seconds to 1 minute were sorted like short stops and gave about 2,3 hour per 1 productive week. The distribution of the stops shows the area of the sawing house where the problems exist. These areas are the saw in feed, the sawline, the green sorting, the stick stacker, the chips and sawdust area. The share of the total stop time is viewed around these areas. A brief analyze of the stick stacker area has been done. For the sawline, the use of degree was measured - 76% - and zones (machines) were pointed out if they are in need of an improvement to increase the productivity. The second goal of the work was to check the flow at the planning mill, at the specific section from the in feed to the planer. The assignment at the planer mill is to look at one special product that gives the lack of boards to the planer. According to the data from SCA, the planer needs 200/3,7 ≈ 54 piece/minute in average. The mean value (pieces/minute) that goes really through the planer is 23 pieces/minute. Capacity losses and areas with problems in this section were estimated.

Place, publisher, year, edition, pages
Keyword [en]
Keyword [sv]
URN: urn:nbn:se:ltu:diva-46122ISRN: LTU-PB-EX--09/009--SELocal ID: 3c35b4f1-fa5d-44d0-a4ff-ac95401d6508OAI: diva2:1019434
Subject / course
Student thesis, at least 30 credits
Educational program
Wood Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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