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- PostResponsible design and conscious material selection for a reduced environmental impact of the indoor lighting industryHaraldosson, Cornelia; Mielcarek, Marcin; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Hammersberg, PeterIn response to the pressing climate crisis challenges facing society, there is a critical need for industries to transition towards a circular economy, encompassing entire production chains. Ateljé Lyktan, a company specializing in innovative lighting solutions, aims to reduce its environmental impact through the selecting of sustainable materials. This thesis investigates potential sustainable materials for indoor lighting products through a comprehensive situation and life cycle analysis of an existing product in ateljé Lyktans’s range, coupled with extensive literature research to identify current market alternatives. The study identified several material options, focusing primarily on biologically based polymers and polymer composites. These alternatives were evaluated using a two-step methodology. The initial screening employed both the chart method and a questionnaire method, while the following ranking process utilized a decision matrix to pinpoint the most promising materials according to this study. The findings highlighted two promising candidates: polylactic acid (PLA) and the composite Biodolomer I. However, neither material fully satisfied all requirements, particularly in terms of durability necessary for the long lifecycle of indoor lighting products. Further investigation into fiber reinforcements, which can enhance the mechanical properties and longevity of bioplastics, revealed flax and hemp as suitable options. Additionally, the fibers OnceMore and FibraQ were recommended for further testing. The study underscores the necessity for developing sufficient end-of-life infrastructure, including new technologies for recycling and composting, to facilitate the large-scale adoption of bioplastics and fiber-reinforced materials. The conclusion calls for ongoing research into sustainable material alternatives and emphasizes the imperative for industries to intensify efforts towards sustainability. This includes the development of robust infrastructure for material recycling and composting, essential for achieving a circular economy
- PostFörbättrad operatörsinteraktion i kontrollrum för högre effektivitet, ökad kvalitet och kostnadsbesparingarVojinovic, Andreana; Johansson, Henri; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Ylipää, Torbjörn; Hellberg, Jill; Lindahl, MartinControl rooms for monitoring and steering play a very important role in many industries, yet this area is underappreciated and rarely discussed. It is often an invisible – but incredibly important – part that constitutes the heart of production. Despite their underestimated role, such rooms are of great importance in ensuring the quality and safety of production flows. This makes it important to deepen the knowledge about control rooms. This project has been initiated by Volvo Cars, which manufactures passenger vehicles. Volvo is characterized by safety, quality, innovation, and sustainability. The company produces modern, safe, high quality cars with people at the centre. They believe that working towards enhancing control room operations can increase production efficiency and product quality. The project has been carried out as a mechanical engineering degree project at Chalmers University of Technology. The aim of the project is to contribute greater insight into and deeper understanding of the complex challenges that exist in a control room in order to enable the development of better control room operations in the future. Observations of the control room in the paint factory, interviews with control room operators and benchmarking against control rooms in other factories led to a better understanding of control room problem areas. The thesis presents the results from the methods used, where focus was on identifying, describing and explaining control room design problem areas and capturing insights from control room solutions in other factories. The results reveal that many control rooms experience the same issues to a greater or lesser degree, aspects that are highlighted in this project. The conclusion is that it is entirely possible to design a more modern, efficient and work environment-friendly control room, as long as there is a strong cross-functional collaboration with the end user in focus
- PostProcessoptimering och förbättringsförslag i fingerskarvning, Analys av fingerskarvens nuvarande underhåll och prestation samt identifiering av förbättringsförslag(2024) Forsler, Anton; Öhman, Sebastian; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Ylipää, Torbjörn; Ylipää, TorbjörnThe timber that is currently used must meet high strength requirements in order to be sold on the Swedish market. The quality of the timber's strength is not evenly distributed and it is extremely important that the defective areas are removed so as not to compromise the timber's overall strength. Through finger jointing, the approved parts can be joined into a plank by gluing and pressing. Derome possesses such a line whose running time has been less than optimal. The study utilized an abductive procedure to identify and highlight improvement opportunities for the finger joint line, and was in the style of a case study at Derome Timber in Derome, Veddige. By combining collected data from interviews, internal databases, and observations, a simulation, pareto chart, as well as ishikawa diagram was established. The collected data is analyzed based on theories around Lean Manufacturing, The Toyota Way, Total Productive Maintenance, and Reliability-Centered Maintenance. Whereupon proposals for improvement measures were drawn up to increase the running time in the finger joint. The results showed that several causes contributed to the majority of the total stop time, where the underlying factors of the causes could be significant. The factors that affected the driving time were underprioritization, lack of training, absence of clear routines and instructions, disorganization, and communication regarding improvement work. The results were analyzed and discussed in comparison with previous studies in the field. Whereupon a basis for further studies was added.
- PostEffect of heat treatment and batch-to-batch material variations on microstructure of C38 steelXia, Jinlu; Addo, Suleyman; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Holmqvist, Gustav; Salame, Charlie; Hoier, PhilippDespite steels from different manufacturers abiding by the same standard specifications, tool wear during grinding of these materials seems to progress differently when comparing batch to batch. Therefore, an investigation was made into the different batches in order to explain this difference in grindability between them. Samples of C38 steel from two different batches were used and heat treated in the same way at three different temperatures. The techniques used in this investigation to assess the difference between batches were light optical microscopy as well as hardness testing. Some differences were observed between the batches before heat treatment but after the heat treatment had been performed there were no differences that could be discerned with an optical microscopy. The hardness tests showed a very small difference where one batch was harder by a maximum of 10 HV. With the tools used in this lab no differences that could lead to a variation in grindability was found. To further investigate the question, more tests need to be run.
- PostOPTIMERING AV PACKNINGSPROCESSEN, En studie inom e-handeln och vikten av en effektiv packningsprocessBäckdahl, Jonatan; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Johansson, Björn; Örtengren, RolandThe e-commerce market is highly competitive, with companies vying for customers purchasing power. It is therefore crucial for companies to deliver their orders smoothly and quickly, not only from economic standpoint but also with a focus on customer experience and environmental impact. The purpose of this study is to identify possible solutions to optimize the company´s packing process to ensure its continued leadership and competitiveness in the market. This qualitative study was conducted at the company Company through semi-structed interviews with employees who have deep insights into the packing process. The study was complemented by data from the company´s internal systems, observations, measurements of processes, and testing of the process built in a simulation program. The study reveals the current state and functioning of the packing process. Based on the analysis, the author has identified processes and areas that can be optimized. Proposed improvements include a better system for monitoring the packing process, the introduction of multiple size options for boxes, smart automated solutions to maintain a smooth production flow, and reduce lead times. The consequences of the current packing process include uneven production efficiency, varying customer experiences, and unnecessary environmental impact. By implementing the proposed improvements, these consequences can be mitigated, enabling the company to offer its customers a holistic experience that is highly competitive in the market.