A1 Journal article (refereed), original research

Utilization of Production-scale Machine in Experimental Fiber Material Convertibility Testing Using a Novel Press-forming Tool Set

Open Access publication

Publication Details
Authors: Tanninen Panu, Ovaska Sami-Seppo, Matthews Sami, Mielonen Katriina, Backfolk Kaj
Publisher: Dept of Wood Paper Science, College of Natural Resources
Publication year: 2017
Language: English
Related Journal or Series Information: Bioresources
Volume number: 12
Issue number: 2
Start page: 3030
End page: 3042
Number of pages: 13
ISSN: 1930-2126
JUFO-Level of this publication: 1
Open Access: Open Access publication


The convertibility of paperboard in a press-forming process was studied using a novel type of tool set that allows forming of small substrates such as laboratory handsheets (i.e. experimental materials) to investigate the role of mold design on substrate-press-tool interaction. The tool set makes it possible to prepare rectangular trays in both sliding and fixed blank modes in a pilot-scale press-forming machine. The tests showed that the fixed-blank mode makes it possible to estimate the elongation of the substrate in the forming process by determining the maximum forming depth for rupture-free samples. A more detailed inspection with an optical microscope of grid-patterned materials revealed that elongation took place mostly on the rim area in addition to the tray wall, and that the outer dimensions of the blank remained practically unchanged. The behavior of the material in press forming process was evaluated in addition to the novel tool set in a bigger, production-scale mold, and results showed good agreement between the small tool set and the standard mold, in spite of the dimensional differences. The smaller size of the mold did not require a compromise in any aspect of the press-forming process.

Last updated on 2018-19-10 at 07:55