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Author:Nevalainen, Juha
Title:Kerrostavan formeriosan kehittäminen imuavusteisen vedenpoiston koelaitteeseen
Development of the layering former part to the experimental device of pulsating water removal
Publication type:Master's thesis
Publication year:2004
Pages:60      Language:   fin
Department/School:Konetekniikan osasto
Main subject:Koneensuunnitteluoppi   (Kon-41)
Supervisor:Kuosmanen, Petri
Instructor:Paltakari, Jouni
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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Location:P1 Ark TKK  6537   | Archive
Abstract (eng): The purpose of this Master's Thesis was to develop a layering former part to the experimental device of pulsating water removal.
The former part should simulate the head box and disperse the suspension to the wire part of the experimental device in many layers.
The former part should also be mobile to produce fiber orientation.

The nozzle of the former part moves with AC-motor.
The power of the motor is transmitted to the nozzle with gear and cogged belt.
Because there is a limited space to the movement, the nozzle part must be accelerated fast.
A centrifugal clutch is placed between the motor and the gear.
The nozzle must be stopped fast after the necessary movement to produce the test sheet.
The braking force is produced with help of compressed air.

In the test of the former part the required movement was achieved to the nozzle.
The speed of almost 0,19 m per second was measured to the nozzle.
That is enough to produce the fiber orientation to the sheets.
The former part is controlled with the computer.
The function of the motor and the brake can be programmed with an accuracy of 100 ms.
Abstract (fin): Paperikoneen viiraosan vedenpoiston tutkimiseen on kehitetty koelaite Paperitekniikan laboratoriossa.
Tämän diplomityön tarkoituksena oli kehittää koelaitteeseen kerrostava formeriosa, jota käytetään sulpun levittämiseen koelaitteen viiraosalle.
Tavoitteena oli perälaatikkoa simuloiva osa joka levittäisi viiralle samanaikaisesti useamman sulppukerroksen.
Lisäksi formeriosan suuttimen oli oltava liikkuva, jotta koelaitteella tuotettaviin koearkkeihin saataisiin kuituorientaatiota.

Suunnittelun tuloksena saatiin konstruktio jossa suutinta liikutetaan vaihtovirtamoottorilla.
Moottorilta saatava teho siirretään liikkuvaan suutinosaan alennusvaihteen ja hammashihnan välityksellä.
Tilarajoitusten vuoksi suutinosa pitää kiihdyttää nopeasti, joten moottorin ja vaihteen väliin sijoitettiin käynnistyskytkin.
Sulpun levityksen jälkeinen suutinosan jarrutus toteutettiin paineilmasylinterillä.

Formeriosan testauksessa todettiin, että koearkkien tuottamiseen tarvittava suutinosan liike voidaan tehdä pienessä tilassa.
Suuttimen nopeudeksi saatiin lähes 0,19 m/s, mikä on riittävä halutun kuituorientaation tuottamiseen.
Formeriosan toimintaa ohjataan tietokoneen avulla.
Moottoria käyttävän taajuusmuuttajan ja paineilmajarrun toiminta-aika voidaan ohjelmoida 100 ms tarkkuudella.
ED:2004-07-07
INSSI record number: 25390
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