Minh Pham Son, Nguyen Van-Thuc, Uyen Tran Minh The, Huy Vu Quang, Le Dang Hai Nguyen, Nguyen Van Thanh Tien
Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 71307, Vietnam.
Faculty of Mechanical Engineering, Industrial University of Ho Chi Minh City, Nguyen Van Bao Street, Ward 4, Go Vap District, Ho Chi Minh City 70000, Vietnam.
Polymers (Basel). 2024 Jan 31;16(3):394. doi: 10.3390/polym16030394.
This study surveys the impacts of injection parameters on the deformation rate of the injected flexure hinge made from ABS, PP, and HDPE. The flexure hinges are generated with different filling time, filling pressure, filling speed, packing time, packing pressure, cooling time, and melt temperature. The amplification ratio of the samples between different injection parameters and different plastic types is measured and compared to figure out the optimal one with a high amplification ratio. The results show that the relationship between the input and output data of the ABS, PP, and HDPE flexure hinges at different injection molding parameters is a linear relation. Changing the material or many injection molding parameters of the hinge could lead to a great impact on the hinge's performance. However, changing each parameter does not lead to a sudden change in the input and output values. Each plastic material has different optimal injection parameters and displacement behaviors. With the ABS flexure hinge, the filling pressure case has the greatest amplification ratio of 8.81, while the filling speed case has the lowest value of 4.81. With the optimal injection parameter and the input value of 105 µm, the ABS flexure hinge could create a maximum average output value of 736.6 µm. With the PP flexure hinge, the melt temperature case achieves the greatest amplification ratio of 6.73, while the filling speed case has the lowest value of 4.1. With the optimal injection parameter and the input value of 128 µm, the PP flexure hinge could create a maximum average output value of 964.8 µm. The average amplification ratio values of all injection molding parameters are 6.85, 5.41, and 4.01, corresponding to ABS, PP, and HDPE flexure hinges. Generally, the ABS flexure hinge has the highest amplification ratios, followed by the PP flexure hinge. The HDPE flexure hinge has the lowest amplification ratios among these plastic types. With the optimal injection parameter and the input value of 218 µm, the HDPE flexure hinge could create a maximum average output value of 699.8 µm. The results provide more insight into plastic flexure hinges and broaden their applications by finding the optimal injection parameters and plastic types.
本研究调查了注射参数对由ABS、PP和HDPE制成的注塑挠性铰链变形率的影响。挠性铰链通过不同的填充时间、填充压力、填充速度、保压时间、保压压力、冷却时间和熔体温度生成。测量并比较不同注射参数和不同塑料类型之间样品的放大倍数，以找出具有高放大倍数的最佳参数。结果表明，在不同注塑参数下，ABS、PP和HDPE挠性铰链的输入和输出数据之间的关系是线性关系。改变铰链的材料或许多注塑参数会对铰链的性能产生很大影响。然而，改变每个参数不会导致输入和输出值的突然变化。每种塑料材料都有不同的最佳注射参数和位移行为。对于ABS挠性铰链，填充压力情况下的放大倍数最大，为8.81，而填充速度情况下的值最低，为4.81。在最佳注射参数和105 µm的输入值下，ABS挠性铰链可产生的最大平均输出值为736.6 µm。对于PP挠性铰链，熔体温度情况下的放大倍数最大，为6.73，而填充速度情况下的值最低，为4.1。在最佳注射参数和128 µm的输入值下，PP挠性铰链可产生的最大平均输出值为964.8 µm。所有注塑参数的平均放大倍数分别为6.85、5.41和4.01，分别对应于ABS、PP和HDPE挠性铰链。一般来说，ABS挠性铰链的放大倍数最高，其次是PP挠性铰链。在这些塑料类型中，HDPE挠性铰链的放大倍数最低。在最佳注射参数和218 µm的输入值下，HDPE挠性铰链可产生的最大平均输出值为699.8 µm。这些结果通过找到最佳注射参数和塑料类型，为塑料挠性铰链提供了更多见解，并拓宽了它们的应用范围。
