| dc.description.abstract | In this study, we use ultra-thin tablet development, the plastic parts wall thickness about 1.0~1.2mm. First use Moldflow 2010 and Abaqus Version 6.7 analysis to identify the hook in front cover will be separate or not with rear cover hook. And the hook will be damage or not. The results show that where the hight risk of the structure. The analysis can indeed improve the structure to perform strong hook connection properties. It can reducing production costs, and accelerates the rapid development of tablet productions.
In this experiment, for enhance the hook structure, front cover original material used Mitsubishi TMB1615(PC+ABS), but after drop test ,the hook on device corner has damage. To find out the more applicable material, Try to use another materials like C7230P(PC+ABS) / CM6140 (PC+ABS) / EXL1414(PC). Compare the drop test result about the four materials, The experimental results showed that, the C7230P(PC+ABS) structure strength is around same wih TMB1615(PC+ABS), but the hook on corner side still damage. Try to use EXL1414(PC) material, after drop test, no hook has damage. We found the Izod impact of material is the point of the the product.
The results show that the most applicable is EXL1414(PC) material, but the mold Shrinkage of EXL141(PC) is 0.4~0.8 % that more than TMB1615(PC+ABS) Shrinkage (0.15~0.35 %). And consider the dimension tolerance of plastic injection process, it will cause that the touch panel can’t assemble with front cover if use EXL1414(PC) material. And the EXL1414(PC) unit cost is more than TMB1615(PC+ABS). Finally, decided to use CM6140(PC+ABS) material for replace original material TMB1615 (PC+ABS).
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