翻领成型器肩曲面轴向偏移研究

发布时间：2018-04-01 08:33

本文选题：包装机　切入点：翻领成型器　出处：《江南大学》2014年硕士论文

【摘要】：翻领成型器是立式制袋—充填—封口包装机中的一个关键部件，其构造及制造质量对包装材料的性能及其袋成型质量有重要的影响。目前广泛使用的翻领成型器在制造时都将其肩曲面在轴向进行一定的偏移，偏移后的袋成型效果优于按理论曲面进行制造的成型器，但偏移的根据没有理论解释，偏移量只是根据经验有一个大概值（2~3mm）。本文基于此现象，，进行了如下几方面的探讨研究。首先，本文对包装材料流经翻领成型器时其厚度的变化进行了初步探究。本文从几何非线性角度探究了材料经过翻领成型器时厚度变化，并给出了厚度与长度变化的式子。其次，本文建立了肩曲面在轴向有偏移的翻领成型器的数学模型；从材料经过领口曲线处的路径与曲率变化方面进行了分析探究。在前一步对包装材料厚度变化研究的基础上，本文通过对比分析材料经过肩曲面在轴向无偏移与有偏移的翻领成型器的原始领口曲线处的路径与曲率变化，发现肩曲面在轴向有一定偏移时，材料经过成型器时的路径比理论上经过肩曲面在轴向无偏移时的路径要长，薄膜的曲率变化也更为缓和。进一步地，本文从材料经过领口曲线处的受力方面进行了分析探究。通过之前两方面的探究，针对前两方面的探究发现，进一步地从受力方面对比分析了包装材料经过肩曲面在轴向无偏移与有偏移的翻领成型器的原始领口曲线处包装材料的受力情况，发现肩曲面在轴向偏移一定距离后，材料受力更大，更易将材料拉过翻领成型器，且与原始领口交接曲线的贴合更为密切。最后通过设计并制作试验装置对包装材料和翻领成型器进行了相关试验，验证了前面的理论分析，并给出了两点选择肩曲面在轴向偏移量的建议。
[Abstract]:Lapel forming is a key component in vertical bag making, filling and sealing packaging machine. Its construction and manufacturing quality have an important impact on the performance of packaging materials and bag molding quality. At present, the widely used lapel molders shift their shoulder surfaces to a certain extent in the axial direction when they are manufactured. The effect of the offset bag is better than that of the one made according to the theoretical surface, but there is no theoretical explanation on the basis of the offset, and the offset is only based on the experience. Based on this phenomenon, the following aspects are discussed and studied in this paper. Firstly, the change of the thickness of the packaging material as it flows through the lapel molder is studied in this paper, and the variation of the thickness and the length of the material through the lapel molder is discussed from the angle of geometric nonlinearity. Secondly, the mathematical model of the turn-off molding with shoulder surface offset in axial direction is established in this paper. This paper analyzes and probes into the path and curvature change of the material passing through the neckline curve. On the basis of the research on the thickness change of the packaging material in the previous step, By comparing and analyzing the path and curvature change of the original neckline curve of the material passing through the shoulder surface, it is found that the shoulder surface has a certain deviation in the axial direction. The path of the material passing through the moulding device is longer than that when the material passes through the shoulder surface in the axial direction and the curvature change of the film is more moderate. Further, this paper analyzes and explores the force of the material passing through the neckline curve. Through the previous two aspects of the inquiry, the first two aspects of the inquiry found, Furthermore, from the point of stress, the paper compares and analyzes the stress of the packaging material at the original neckline curve of the shoulder surface with or without deviation from the shoulder surface. It is found that the shoulder surface is at a certain distance after the axial deviation. It is easier to pull the material over the lapel molder and fit the curve of the original neckline more closely. Finally, by designing and making the test device, the related tests on packaging materials and lapel molders are carried out, and the theoretical analysis is verified, and the suggestion of selecting the axial offset of two points shoulder surface is given.
【学位授予单位】：江南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB486

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