Enhanced cleaning and efficiency in paper coreboard production: Oradoc's turnkey solution, Sara Giunchi, Communications & Marketing, Oradoc

PAPERTECHNOLOGYINTERNATIONAL
Enhanced cleaning and efficiency in paper coreboard production:
Oradoc’s turnkey solution
Sara Giunchi, Communications & Marketing, Oradoc
INTRODUCTION:
The Spanish paper mill of a global leader in sustainable paper and packaging – operating in 40 countries with over 500 packaging
converting operations and 59 paper mills – faced challenges with their existing drying and doctoring systems, leading to contamination and
quality issues in the final product.
Here the main features of PM1: driers’ face mm. 2465,
producing coreboard with a base weight of 200 – 620 g/m² at a max
speed of 800 m/min.
The production process highlighted two main initial challenges:
• contamination from residual paper dust: accumulation
of paper dust and residues on the doctor blade’s
bevel were subsequently transferred onto the paper,
contaminating the final product. This contamination
resulted in frequent maintenance interventions and a
reduction in paper machine efficiency and quality of the
paper produced
• ineffective cleaning mechanism: the paper machine’s
dryer cylinder, equipped with an outdated gravity-type
rigid doctor with electromechanical oscillation, was
unable to ensure optimal cleaning of the drying surface,
negatively impacting the quality of the 昀椀nished product.
Figure 2: Suction box activity with machine running.
Figure 1: The outdated gravity-loaded rigid doctor with
electromechanical oscillation that was replaced.
Oradoc’s turnkey solution
After a thorough analysis, Oradoc developed and
implemented a comprehensive “turnkey” project, which included site
surveys, doctor’s design, and installation of advanced technologies.
The key solutions provided were OraFlex™ - as flexible doctor
blade holder – and OraDust™ - as integrated dust removal system,
which is also Oradoc’s newest product.
OraFlex™ is a flexible blade holder specifically designed for
paper machines, ensuring optimal cleaning even under challenging
conditions; it is ideal for critical positions such as presses, breast
rolls, first and last dryers, calenders and pope reels. The OraFlex™
system, featuring a flexible DST blade holder, was introduced to
adapt more effectively to the dryer surface; this flexibility improved
doctoring efficiency and increased the cleanliness of the surface.

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