This report covers a product development project conducted as Bachelor of Science thesis forthe Innovation & design engineer program at Karlstad University.The assignment was supplied by MMB Consulting, Kristinehamn. The purpose of this projectwas to find an alternative way of shaping wire-net insulation mats. This insulation product isused for fire and thermal insulation of technical installations. The insulation consists of stoneor glass wool with a sewn on steel wire netting on the out facing side. This netting has thepurpose to enable fastening to e.g. ventilation ducts and to provide bounding of joints. Thiswire netting makes regular methods for fitting stone or glass wool non applicable. Theexisting method for shaping wire-net insulation has flaws due to not being designed for thisapplication. These flaws include poor ergonomics, efficiency and low result quality.The objectives with this project is to find a new method that makes fitting of wire-netinsulation more efficient and safer for the user regarding personal safety and ergonomics.The work has been conducted according to the methods of the industrial product developmentprocess and the design methodology.The project resulted in a motor driven tool for shaping wire-net insulation that according to atheoretical foundation has proven to be more user adapted through being designed for goodergonomics and by offering a simpler handling. This solution is also considered to be moreefficient and to give better results than the present solution. Some correlation betweenreductions in energy losses from technical installations and the new method is detectable.

I detta arbete undersöks hur konstruktionsförändringar i mönster påverkar utnyttjandegrad och tygåtgång i en enfärgad, halvfodrad, herrkavaj som idag tillverkas på ett svenskt väletablerat konfektionsföretag. Funderingar kring tygåtgång och materialoptimering uppstod då tillskärning och sömnad av kavajprovet gjordes. Designen och därmed konstruktionen är i dagsläget sådan, att man använder yttertyg till vissa mönsterdelar som i helfodrade herrkavajer vanligtvis tillverkas i fodertyg. Yttertyg kräver i förhållande till fodertyg mer fibrer och är mer kostsamt, därför ska det i detta arbete undersökas hur tre alternativa mönsterkonstruktioner påverkar tygåtgång och utnyttjandegraden av material. Förhoppningen är att för företaget spara pengar och inte minst i förlängningen vara fördelaktigt ur ett hållbarhetsperspektiv. Tillvägagångssätt för att undersöka materialoptimeringen är en rekonstruktionsprocess, en läggbildsprocess och slutligen en sammanställning, där de alternativa konstruktionernas resultat sammanställs. Detta resultat visas för företaget, som tar ställning till vilken typ av konstruktion man i framtiden kan välja i respektive tillverkning. Vid jämförelsen av ursprungsmodellen mot de alternativa konstruktionerna, visade det sig i det här fallet vara fördelaktigt både ekonomiskt och miljömässigt att använda en alternativ konstruktion. / In this thesis a study on how pattern construction affects utilization and material consumption in a solid colored blazer has been made. The original blazer is currently produced at a Swedish clothing company. When cutting and sewing of sales sample was done, thoughts about material consumption and utilization appeared. In today’s design, by that means construction, shell fabric is used as facing and as parts of the lining and pockets, which are usually made out of lining. Shell fabric requires more fibers and is in comparison to lining more costly. Therefore in this thesis it will be investigated, how three alternative pattern constructions affects the consumption and utilization of fabric. The purpose is to help the company save money and contribute to a positive economic situation, as well as having a positive impact on our environment. The approach used to investigate material optimization, is a pattern reconstruction process, a marker making process and a summary, which will show the results of the study’s variations. The result is presented to the company, which can make a decision on which construction will be used in future productions. When comparing the original blazer with the variable patterns, was in this case shown being advantageously both economically and environmentally.