| Summary: | 碩士 === 國立虎尾科技大學 === 機械與電腦輔助工程系碩士班在職專班 === 106 === five-gallon metal square bucket is a customized and irregular bucket that is mostly used to store/contain large load of solid or liquid contents; it requires selected sturdy containers to make sure the safety of content during the packaging and delivering of more dangerous chemicals. Square buckets have features, including but not limited to, good protection, no deformation, shock resistance and fire resistance, which are complete packaging containers. Due to the fact that manufacture of metal can is a capital-intensive industry, cost reduction of materials is particularly important to improve competitiveness. This paper discussed light-weighting, which is the most direct and effective way to reduce costs. The thickness of SPTE material has reduced to 0.13mm from 0.28mm, which is an observation of food containers in European from 1994 to 2017, indicating that metal container packages has improved on strength and processing performance, proving the development trends and application facts of light-weighting technology.
The paper herein took light-weighting of 18L metal square bucket as the main direction, addressing the different stages starting from current material properties and process equipment to the level of impacting on molding equipment. It discussed the thinner thickness of material leading to the decrease of rigidity and strength, with which one can press reinforcement patterns on the square bucket and press reinforcement ribs at four concerns to strengthen the vertical and horizontal support structure of bucket. In order to enhance sealing quality and strength of seam, we may add the number of board layer at top of square bucket combining the seam, which increases it from double seaming Double Seam to a total of Triple Seaming (4-layer of cap bending plus 3-layer of bucket bending) to fasten up boards tightly. The molding parameter design is obtained from physical projection measurement with mathematical formula, among of which, computer-aided SolidWorks、Auto CAD was used to identify the optimal relevance amid molds and components. Additionally, FEM was also used to analyze and validate the maximum feasibility and optimal parameter in the design.
The paper, at last, stated the test of physical object with hydraulic testing machine that four kinds of metal buckets designed hereof including A, B, C and D were conducted with compression test on the reinforced patterns; the results showed that B-type bucket had more strength than A-type by 15%, C-type bucket had more strength than B-type by 25%, and D-type bucket had more strength than C-type by 12%. FEM was also used to analyze the seaming strength and the result showed that triple seaming had more strength than double seaming by 13%. These tests proved that the square buckets discussed hereof are superior to traditional types in terms of rigidity and strength.
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