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US 12,479,185 B2Granted
Plant and method for producing a corrugated board
AssigneeFosber S.p.A.
InventorsMarco Imposti, Gianluca Berrettini
Life of this patent
Estimating the term…
Abstract
The plant for producing a corrugated board includes one or more single facers and a double facer, as well as respective unwinders for unwinding reels of paper webs. Arranged along the production line, in suitable positions, are thermographic cameras which acquire images through which it is possible to trace the various characteristics of the cardboard, for example the moisture content thereof, detect manufacturing defects, after which it is possible to intervene on one or more process parameters so as to eliminate the causes of the defects.
Claims13
A plant for producing a corrugated board, comprising:
- a first unwinder for unwinding a first continuous paper web from a first reel;
- a second unwinder for unwinding a second continuous paper web from a second reel;
- a third unwinder for unwinding a third continuous paper web from a third reel;
- a single facer configured to receive the first continuous paper web and the second continuous paper web, corrugate the first continuous paper web, and glue together the first continuous paper web and the second continuous paper web along corrugation flutes formed in the first continuous paper web and form a continuous single face corrugated board web;
- a double facer configured to receive the continuous single face corrugated board web and the third continuous paper web and glue the continuous single face corrugated board web and the third continuous paper web together along the corrugation flutes formed in the first continuous paper web and form a continuous corrugated board web;
- at least one first thermographic camera positioned along an advancement path direction of at least one continuous web selected from said first continuous paper web, said second continuous paper web, said third continuous paper web, said continuous single face corrugated board web, and said continuous corrugated board web, for detecting thermographic images of said at least one continuous web;
- a control system comprising a thermographic image processing system which is programmed in relation to each of said at least one thermographic camera to (1) extrapolate in real time from the thermographic images acquired by the at least one thermographic camera temperature profiles according to lines transverse to the advancement path direction of the at least one continuous web framed by the at least one thermographic camera;
- and (2) determine a maximum temperature value, a minimum temperature value, and an average temperature value along each temperature profile.
5 more elements
A plant for producing a corrugated board, comprising:
- a first unwinder for unwinding a first continuous paper web from a first reel;
- a second unwinder for unwinding a second continuous paper web from a second reel;
- a third unwinder for unwinding a third continuous paper web from a third reel;
- a single facer configured to receive the first continuous paper web and the second continuous paper web, corrugate the first continuous paper web, and glue together the first continuous paper web and the second continuous paper web along corrugation flutes formed in the first continuous paper web and form a continuous single face corrugated board web;
- a double facer configured to receive the continuous single face corrugated board web and the third continuous paper web and glue the continuous single face corrugated board web and the third continuous paper web together along the corrugation flutes formed in the first continuous paper web and form a continuous corrugated board web;
- at least one first thermographic camera positioned along an advancement path direction of at least one continuous web selected from said first continuous paper web, said second continuous paper web, said third continuous paper web, said continuous single face corrugated board web, and said continuous corrugated board web, for detecting thermographic images of said at least one continuous web;
- a control system comprising a thermographic image processing system which, for each of said at least one thermographic camera, is adapted to extrapolate in real time from the thermographic images acquired by the at least one thermographic camera, temperature profiles according to lines transverse to the advancement path direction of the at least one continuous web framed by the at least one thermographic camera;
- and determine a maximum temperature value, a minimum temperature value, and an average temperature value along each temperature profile;
- wherein a measurement arrangement for detecting a variation of a transverse dimension of a respective one of the at least one continuous web upstream and downstream of a heating member is arranged along the advancement path of the at least one continuous web, in which the at least one first thermographic camera is provided.
6 more elements
A plant for producing a corrugated board, comprising:
- a first unwinder for unwinding a first continuous paper web from a first reel;
- a second unwinder for unwinding a second continuous paper web from a second reel;
- a third unwinder for unwinding a third continuous paper web from a third reel;
- a single facer configured to receive the first continuous paper web and the second continuous paper web, corrugate the first continuous paper web, and glue together the first continuous paper web and the second continuous paper web along corrugation flutes formed in the first continuous paper web and form a continuous single face corrugated board web;
- a double facer configured to receive the continuous single face corrugated board web and the third continuous paper web and glue the continuous single face corrugated board web and the third continuous paper web together along the corrugation flutes formed in the first continuous paper web and form a continuous corrugated board web;
- at least one first thermographic camera positioned along an advancement path direction of at least one continuous web selected from said first continuous paper web, said second continuous paper web, said third continuous paper web, said continuous single face corrugated board web, and said continuous corrugated board web, for detecting thermographic images of said at least one continuous web;
- a control system comprising a thermographic image processing system which, for each of said at least one thermographic camera, is adapted to extrapolate in real time from the thermographic images acquired by the at least one thermographic camera, temperature profiles according to lines transverse to the advancement path direction of the at least one continuous web framed by the at least one thermographic camera;
- and determine a maximum temperature value, a minimum temperature value, and an average temperature value along each temperature profile;
- wherein arranged along a first advancement path of a first of said at least one continuous web is a first heating member;
- arranged along a second advancement path of a second of said at least one continuous web is a second heating member;
- arranged along the first advancement path is a first system for detecting transverse shrinkage of the first continuous web;
- arranged along the second advancement path is a second system for detecting transverse shrinkage of the second continuous web;
- and the control system is adapted to receive information on the transverse shrinkage of the first continuous web and the transverse shrinkage of the second continuous web.
10 more elements
Dependencies are inferred from the claim text.