Effektivisering vid byte av högtryckskik - Ett periodiskt förebyggande underhållsarbete

Sammanfattning: In the continuous manufacturing process which is used on Billerud Korsnäs in Gävle, maintenance of machinery and equipment is a major process. Through its work with continuous improvements, the mill has identified that the change of high-pressure feeder on line 1 is more time-consuming than the replacement of the other two high pressure feeders on the mill. The purpose and aim of the study is to streamline the replacement of high-pressure feeder by updating the preparation documentation, as well as the construction of a lift bar adjacent to the feeder, with a preliminary cost proposal. The zero-state analysis has been based on semi-structured individual interviews and close collaboration with a technician at the mill. Observations, measurements, strength calculations and a construction manual were used during the preliminary study of a lift beam adjacent to the feeder. Improvement opportunities were identified, analyzed and prioritized, which led to an action plan. Wasting can be reduced by setting up routine lists that are helpful during work-outs previously carried out by entrepreneurs. The introduction of pockets on the warehouse used during the change, as well as preventive maintenance on the chisel flange joint is recommended to increase the amount of weathering time during the change. The GAP analysis showed that up to 36 percent of the last maintenance effort may be due to waste in terms of waiting times and problems. The waste can be reduced by a good basis for preparation. The cost of the beam construction and a new lifting equipment amounted to SEK 832 thousand. Investment costs can be repaid within a reasonable time if the feeder is replaced by corrective maintenance. The lack of a fixed beam affects the length of the production stop to a limited extent in the event of a planned change, but the investment should provide a security improvement. Through the Gantt schedules and mapping of all the inputs, future processing work and replacement of high-pressure feeder will be carried out more efficiently. The documentation ensures that knowledge remains on the workplace and that the dependency of the persons is reduced.