Ergonomic design of crayons using 3D printing mould

Mohd Nizam, Nur Aqilah (2023) Ergonomic design of crayons using 3D printing mould. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Multiple studies have demonstrated the benefits of using crayons in the occupational therapy programme. Colouring using crayons improving better motor skill that aids in the development of other abilities. Crayons assist youngsters in developing the skills necessary to wield a pencil, and the ergonomic component is critical in this process. Thus, the aim of this project is to design a new shape of organic crayon mould by considering several aspects such as holding style, grip position and other related aspects. The reason of doing this project is because of the lack consideration of designing the shape of crayon which most of the commercial crayon has cylinder-like shape with blunt tip at the end. The common shape of the crayon causes it to easily break and sometimes difficult for young children to hold it properly. The new design of crayon mould is based on output obtained from a quantitative survey. The survey has been answered by 100 children at the age of 4 to 6 years old. From the survey, the main findings of the survey show majority of Malaysians children was heavily taught to use type J, dynamic tripod style in holding pencils. A lot of research has been done and proving the importance of that style towards the ergonomic of children’s pencils and crayons. After gathering the data survey, a set of selection criteria was considered. Those criteria were matched to form five conceptual designs. the Pugh’s method was applied and evaluated the best design out of five conceptual designs. The final design, however, has limitation in terms of cost and weight. Thus, some modifications have been made before designed in SolidWorks software. Overall, three simulation tests and one physical test have been conducted on the mould. There is weight test, static analysis test and thermal test. The last physical test was done to get the duration of complete set of crayons. Finally, the expected outcome from this project is to have a mould for crayons that will assist children in their writing and drawing journey according to their needs.

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