Optimisation of deep drawn paperboard structures by adaptation of the blank holder force trajectory

Hauptmann, Marek; Weyhe, Jakob; Majschak, Jens‐Peter

doi:10.1016/j.jmatprotec.2016.02.007

Cited by 26 publications

(23 citation statements)

References 13 publications

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“…It must therefore be made relatively thick or had to be positioned at a relatively large distance above the die, thus increasing the free length of the material which causes an uncontrolled wrinkling. In (Marek Hauptmann, 2015) it is also pointed out that without the friction in the clearance the punch load must be absorbed by the bottom of the cup alone which increases the tensile stress. Since the studies have shown that sufficient blank holder force can be applied to the sonotrode, the spacer plate is omitted in the course.…”

Section: Implementation Of Ultrasonic Vibrations In the Deep Drawing mentioning

confidence: 99%

The use and application of ultrasonic vibrations in the 3D deformation of paper and cardboard

Löwe

Hofmann

Hauptmann

2017

Journal of Materials Processing Technology

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Section: Implementation Of Ultrasonic Vibrations In the Deep Drawing mentioning

confidence: 99%

The use and application of ultrasonic vibrations in the 3D deformation of paper and cardboard

Löwe

Hofmann

Hauptmann

2017

Journal of Materials Processing Technology

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“…The blank holder force was investigated using two different designs; a constant blank holder force was used as a reference and was compared with a rupture optimized design (Hauptmann et al 2015a). The design was adjusted according to elevations in temperature, compression, or moisture.…”

Section: Influencing Parameters Included In the Experimentsmentioning

confidence: 99%

“…However, it is believed that the blank holder force has only a minor influence on the fixation of the wrinkles, which is important for the stability of the wall of 3D structures. Recent investigations have shown further drastic improvement in visual quality of 3D structures using blank holder force trajectories adapted to the endurable load of the material (Hauptmann et al 2015a). The concept of an increased blank holder force might have an effect on the deformation mechanisms in the material, which also affects the wall stability.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Influences on the Wall Stability of Deep Drawn Paperboard Shapes

Hauptmann

Majschak

2016

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Deep drawn shapes with orthogonal wall components are usually evaluated by shape accuracy and visual quality. There have been only a few investigations on the stability of such structures; however, the effect of the wrinkles on the stability of the wall is important for packaging applications and can support the shape accuracy. This paper focuses on the influences of process parameters on the stability of orthogonal walls of shapes produced by deep drawing with rigid tools and immediate compression. The wall stability was evaluated by tensile testing orthogonal to the direction of the wrinkles. The stability distribution was characterized with regard to the drawing height, and a comparison was made between the two different materials. The wall stability decreased with increases in the forming height. Furthermore, a blank holder force design and zdirectional compression level improved the wall stability. Together with an elevated moisture content of the material and thermal energy supply that delivered two to three times higher resistance against wrinkle extension, these effects drastically improved the wall stability.

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“…This ensured that during the deep-drawing process, the remaining material between the blankholder and matrix was applied with an approximately constant pressure almost up to the final drawing height (Hauptmann et al 2016). The blankholder force (Fbh) shall be denoted by the initial, maximal blankholder force (F0) hereafter.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dominant Process Parameters in Deep-Drawing of Paperboard

Müller¹,

Lenske²,

Hauptmann³

et al. 2017

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The application of the wrinkle measuring method described in Müller et al. (2017) and the subsequent evaluation algorithm of a range of deepdrawn samples were used to determine the influences and interdependencies of blankholder force, tool temperatures, and drawing height on the formation of wrinkles in paperboard. The main influences were identified and quantitatively evaluated. For the given experimental space, a regression function was derived and validated in further experiments. It was shown that a quadratic regression was superior to the previously used linear regression. The findings were discussed and compared with the results of similar experiments from past publications. Special attention was given to the wrinkles formed and the resulting quality of the formed paperboard cups. The restrictions of the data acquisition from the measuring method that was used and limitations of the model were presented to demonstrate the reliability of the results.

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Optimisation of deep drawn paperboard structures by adaptation of the blank holder force trajectory

Cited by 26 publications

References 13 publications

The use and application of ultrasonic vibrations in the 3D deformation of paper and cardboard

The use and application of ultrasonic vibrations in the 3D deformation of paper and cardboard

Characterization of Influences on the Wall Stability of Deep Drawn Paperboard Shapes

Analysis of Dominant Process Parameters in Deep-Drawing of Paperboard

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