I ett samhälle som stävar alltmer mot hållbarhet och minskade utsläpp så är det viktigt att arbeta med nya material som bidrar till detta. Denna studie undersöker om den träfiberbaserade termoplasten Prime från Woodcomposites kan vara ett potentiellt ersättningsmaterial till toppkåpan på Husqvarnas Automower. Prime är en termoplast som innehåller 20% träfiber. Komponenten är idag tillverkad i ASA, vilket är en petroleumbaserad termoplast och nära släkting till ABS. På grund av den ökade tillgängligheten till materialdata för ABS jämfört med ASA och plasternas synnerligen liknande egenskaper så kommer samtliga tester i rapporten att utföras med ABS. Rapporten kommer att ta reda på om det går att minska koldioxidutsläppen vid tillverkning av kåpan, samt om Prime klarar av Husqvarnas hållfasthetskrav och att användas i utomhusmiljö. Förutom att de mekaniska egenskaperna är viktiga så spelar även ett materials utseende stor roll i hur attraktiv en produkt blir. Därför presenterar rapporten två designkoncept som syftar till att ge förslag på hur man kan integrera materialet i Husqvarnas design. Resultaten visar att det går att göra en minskning i CO2-utsläpp vid tillverkning på 34,7% om man byter ut ABS mot Prime. Dessutom, i kontrast till hypotesen så absorberar Prime endast marginellt mer fukt. Det handlar om tiondels procentenheter. Utöver detta så är det mer styvt än ABS och har ett liknande inköpspris vilket tyder på goda möjligheter att kunna använda Prime som alternativ till ASA i denna applikation. / In a society where sustainability and reduced carbon emissions is an increasingly important topic, it’s important to work with materials that contributes to this. This study is investigating if the wood-fibre based thermoplastic Prime from Woodcomposites has the potential to replace the material of the top cover for Husqvarna’s Automower. Prime is a thermoplastic containing 20% wood-fibres. Today the component is made from ASA, which is a petroleum-based thermoplastic that is closely related to ABS. Due to the increased availability of material data for ABS compared to ASA and the fact that they have very similar physical properties, all of the tests in this report will be performed with ABS. The study will find out if it’s possible to reduce the carbon emissions from manufacturing of the cover, but also if Prime is up to the material standards of Husqvarna and is fit to be used in an outdoor environment. Besides the importance of the mechanical properties, the look of the material also plays a big role in determining if it’s applicable to the product. It has to match the current design language and brand image of the company. Therefore, there are two design concepts presented in the report to give an idea of how the material can be implemented in Husqvarna’s design. The results show that it’s possible to reduce the carbon emissions from manufacturing by 34,7% if you change the material from ASA to Prime. Furthermore, in contrast to the hypothesis the absorption of moisture in Prime is only a fraction of a percent larger than ABS. Prime is also stiffer and has a similar price which speaks for the possibility to use it as an alternative to ASA in this application.

The master thesis deals with design to produce terminal using the plastic injection molding. In the first part are theoretical information about injection molding and injection molding with inserts. The second part is a concrete design of production terminal which contains: injection mold design, calculation of the injection parameters, machine selection, technical and economic evaluation of production. Terminal is made of polyamide 66, inserts material is brass. Parts of injection mold assembly are selected from Hasco standards. The main parts of assembly are made of 1.2312 steel. Production cycle is placed on injection machine Allrounder 375 V from Arburg.

The master´s thesis is focused on technology of injection plastics. The specified part is guard cover of mobile phone. The first part of thesis is focused on description of technology with priority on construction of form. The second part of thesis includes calculations of parameters, which are needed for production, along with techno-economic evaluation of selected construction design.

Thermoplastic injection technology is widely used in all sectors of consumer electronics and automotive industry. The biggest advantage of this manufacturing technology is a high degree of automatization and good reproducibility of the manufacturing process. Another advantage is the possibility of recycling of the gating scrap and defective products. The main task of this work is to calculate the necessary parameters for the injection process, which takes place at the designed injection form. Next part is technical design which includes choice of standard parts of injection mold and idividual semi-finished parts for mold. Thesis continues with selecting the type of injection press based on calculated parameters of the injection process. Thesis is finished by technical-economic evaluation.