管式预粘合纸箱结构参数与抗压强度的相关关系

目的研究管式预粘合纸箱结构参数与抗压强度的相关关系,为优化纸箱结构设计以及提高其抗压强度提供依据。方法首先设计普通、四棱台、花形锁等3种代表性管式预粘合纸箱,进而确定3种纸箱影响抗压强度的关键结构参数。其次将各结构参数依次作为自变量,其余结构参数作为常量,利用纸箱抗压试验机进行空箱抗压试验,记录各自的最大压溃力。最后对实验数据进行分析,明确抗压强度与结构参数间的相关关系。结果 3种纸箱的抗压强度均随着周长的增大而增大,其抗压强度并非全部随高度的增大而降低。考虑周长因素时,普通箱的抗压强度最佳;考虑高度因素时,花形锁箱的抗压强度最佳;考虑箱型因素时,当普通箱长宽比接近1.0,四棱台箱下上底比在1.2~1.4范围内,花形锁箱的啮合点和花形锁圆心的连线与水平线所成夹角接近30°时,抗压强度最佳。因结构参数的影响,管式预粘合纸箱的抗压强度整体上显著优于标准开槽纸箱。结论预粘合纸箱的关键结构参数对其抗压强度有显著影响,在设计时应给予足够的重视。

Correlativity between Structural Parameters and Compressive Strength of the Tube-shaped Folder Boxes

The work aims to study the correlativity between the structural parameters and compressive strength of the tube-shaped folder boxes, so as to provide the basis for the design optimization of box structure and its compressive strength. Firstly, three typical tube-shaped folder boxes, including the common, the quadrangular frustum pyramid and the flower-lock-tuck ones, were designed to further determine the key structural parameters of the three kinds of boxes that affected the compressive strength. Secondly, with each structural parameter as the independent variable in order, and the remaining structural parameters as the constants, the box compression tester was used to carry out the empty container compression test and record their respective maximum crush force. Finally, the experimental data were analyzed to clarify the correlativity between the compressive strength and the structural parameters. The compressive strengths of the three kinds of boxes increased with the increase of the circumference. However, not all the compressive strengths were reduced with the increase of the height. In considering the circumference, the compressive strength of the common box was the best. Whereas, the compressive strength of the flower-lock-tuck box was the best in considering the height. Given the box types, the compressive strength was the optimal under the conditions that the length to width ratio of the common boxes approached 1.0, the bottom to top ratio of the quadrangular frustum pyramid box was within the range of 1.2~1.4, and the angle between the line of coincident point-circle center and the horizontal line approached 30° of the flower-lock-tuck box. The compressive strength of the tube-shaped folder boxes was overall superior than that of the regular slotted boxes due to the effects of the structural parameters. The key structural parameters of the tube-shaped folder boxes significantly affect the compressive strength. Therefore, more attention should be paid to the design of the tube-shaped folder boxes.