Metso Paper Inc.

Tapio Mäenpää

Pekka Koivukunnas

Pekka Linnonmaa

Vilho Nissinen

Mika Viljanmaa

Pekka Kivioja

Markku Kyytsönen

Teppo Kojo

Petteri Lannes

Heikki Kettunen

Aaron Mannio

Tatu Pitkänen

Juha Ehrola

Topi Tynkkynen

Matti Lares

Kari Hasanen

Eero Suomi

Marko Tiilikainen

Erkki Leinonen

Matti Innala

Rami Vanninen

Timo Vuorimies

Risto Mäkinen

Jari Tiitta

Markus Laitila

Helena Leppäkoski

John K Shakespeare

Toni Heikkilä

Matti M Kemppainen

Markku Kojo

Tarja Hanska

Toni Seppänen

Marjaana Toppila

Kalle Hasu

Ilkka Hiirsalmi

Olli-Pekka Väkevä

A method and a system to control a reeling profile of a material web reel (), when, in the forming of a material web reel (), a web is reeled around a reeling core and when in an adjustment of CD-directional profiles of the web reel, profiling devices () have been applied. For adjusting quality profiles and reeling profiles of the web, profiling devices are managed with the help of profile measurings of the roller nip and/or of the profile measurings of the reel (), which are obtained from the reel-up (). A measuring device () for a measuring of a CD-directional hardness profile of the fiber web reel includes a measuring head (), which is connected with a loading means (), which loads the measuring head against the fiber web reel. The motion course of the measuring head is linear.

Reeling method and system as well as an measuring apparatus

The invention relates to a method for controlling a surface quality variable () in one or more fiber webs () in a shoe calender () comprising one or more calender nips. In each calender nip of the shoe calender, the overall loading pressure of the shoe element () and the loading pressure difference between the leading edge (') and the trailing edge (&#x2033;) of the shoe element are controlled so as to achieve minimum difference between the determined values (&#x2033;) for the surface quality variables of the fiber web and the set values (&#x2032;) for the same quality variables after the shoe calender.

Method for controlling one or more surface quality variables of a fiber web in a shoe calender

A method and arrangement for computing and regulating distribution of linear load in a multi-nip calender. A material web is passed through the nips in a set of rolls including a variable-crown upper roll, a variable-crown lower roll and intermediate rolls positioned between the upper and lower rolls. The rolls in the set of rolls are supported so that, when the nips are closed, the bending lines of the rolls are curved downwards. When computing and regulating the linear loads, one or more of the physical properties affecting the bending of each intermediate roll under load, such as bending rigidity, mass, shape, and material properties, are taken into account. The ratio of the linear loads applied to the intermediate rolls, the weight of the rolls per se, and/or the support forces applied to the rolls are regulated so that the set of rolls is in a state of equilibrium and a predetermined state of deflection.

Method and arrangement for computing and regulating the distribution of a linear load in a multi-nip calender and a multi-nip calender

In a measurement method in the manufacture of paper or paperboard, different forces prevailing in a nip between a roll and a counter roll of an apparatus conveying a paper or paperboard web are measured. In the method there are several measurement points implemented with one or more film sensors () placed in the roll () in the transverse direction of the paper or paperboard web. The measurement information obtained from the measurement points by means of the sensor or sensors () is utilized to determine the pressure distribution of the nip. The film sensor () is a piezo- and pyroluminescent sensor from which the measurement information can be received optically at least in the initial stage, or a sensor comprising an electromechanical film (EMFi). The sensors () placed in the calender roll () can be utilized to measure the pressure distribution of the calender nip (N).

Measurement method and system in the manufacture of paper or paperboard

The surface of a web is monitored by a fault detection system (), a machine condition monitoring system, a quality measurement system, a web moisture measurement and/or a web temperature measurement and the soiled part of the surface of the roll is detected and localized by means of a soiling monitoring apparatus (). A control system () controls a cleaning device () to remove the detected soiling. As a web (W) travels in a paper or board production or finishing process or in finishing machinery the web and/or the surface of the roll is monitored and after a detected deviation the surface thereof is momentarily spread with a liquid while machinery is running at the same time as the web (W) travels over said roll surface.

Method and equipment for cleaning and maintaining rolls

The invention relates to a method by means of which the machine-direction moisture of a web being coated can be controlled in an optimal manner that takes into account moisture content changes along the entire path of the coating and drying process. Advantageously, all the dryers the coater section are controlled in an integrated manner in order to obtain a controlledly processed product which is optimized in regard to energy consumption and product quality. Each process section and unit contributing to the drying of the web is identified by means of a mathematical submodel describing the specific evaporation rate in the respective process section/unit and, by chaining these submodels, a composite model is compiled for the entire process, whereby the composite model makes it possible to manage the drying operation in the process so that the individual units are controlled as a portion of the overall process.

Method for controlling the moisture of a web in machine direction on a coating machine

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Helsinki, Finland

Tapio Mäenpää