Loading patent…
AssigneeMitsubishi Jukogyo Kabushiki Kaisha
InventorsHiroyuki Takenaka, Yorishige Tosaka, Yasunobu Sahara, Yoshiaki Maruyama, Hidenori Yamane, Akio Izuwa
Estimating the term…
Object: Prevention of generation of press marks as well as increase of wear resistance at a corrugation tip portion and thereby providing a corrugating roll having a much improved life. Construction: A manufacturing method of a corrugating roll useful for forming a wave-shaped core paper of corrugated board, characterized in that the corrugating roll is worked to form tooth-shaped corrugation portions on the outer circumference and applying a nitriding treatment or a carbo-nitriding treatment, and then applying to the corrugation portion of the corrugating roll a quenching and tempering treatment, and further forming a wear resistant coating on the surface of the corrugation portion.
A manufacturing method of a corrugating roll useful for forming a wave-shaped core paper of corrugated board, comprising the steps of:
A manufacturing method of a corrugating roll comprising tooth-shaped corrugation portions on an outer circumference of the corrugating roll, comprising applying to a base metal of the corrugation portions of the corrugating roll by a nitriding treatment or a carbo-nitriding treatment and then applying a quench hardening treatment, and forming a high hardness outer layer of a thickness of 0.6 mm or more and of a Shore hardness (Hs) of 80 or more along a profile of the corrugation tip portion or the corrugation portion.
Dependencies are inferred from the claim text.