doctor
Dutch translation: schraapmes/rakel
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| 22:27 Oct 24, 2015 |
| English to Dutch translations [PRO] Tech/Engineering - Engineering (general) | |||||||
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|  Selected response from: Barend van Zadelhoff Netherlands Local time: 15:01 | ||||||
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| 3 | rakel van een borstwals |
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| Discussion entries: 1 | |
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33 mins confidence: 
| breast roll doctor rakel van een borstwals Explanation: In rotogravure printing the doctor blade (from ductor blade)[1] removes the excess ink from the smooth non-engraved portions of the image carrier [2] and the land areas of the cell walls.[3] Doctor blades are also used in other printing and coating processes, such as flexo and pad printing for the same function. It is believed that the name derives from the blades used in flatbed letterpress equipment for blades used to wipe ductor rolls, and "ductor" became doctor.[ https://en.wikipedia.org/wiki/Doctor_blade Een rakel is een technische term voor een mesvormig gereedschap van bijvoorbeeld rubber, staal of hout. Deze wordt gebruikt voor het wegschrapen van het teveel aan inkt van bijvoorbeeld een diepdrukcylinder zoals gebruikt in een drukkerij. Een andere toepassing is bij het maken van zeefdrukken. Hier wordt met behulp van dit instrument de inkt door de nog open delen in het gaas (i.e. de afbeelding) van het zeefdrukraam fysiek op het te bedrukken substraat gebracht. https://nl.wikipedia.org/wiki/Rakel breast roll doctor = Schaber an der Brustwalze (borstwals) http://tinyurl.com/ojft2a6 Schaber/Abstreifmesser = rakel (IATE) -------------------------------------------------- Note added at 1 hr (2015-10-24 23:27:51 GMT) -------------------------------------------------- Context of paper machines Two large rolls typically form the ends of the drainage section, which is called the drainage table. The breast roll is located under the flow box, the jet being aimed to land on it at about the top centre. At the other end of the drainage table is the suction (couch) roll. The couch roll is a hollow shell, drilled with many thousands of precisely spaced holes of about 4 to 5 mm diameter. The hollow shell roll rotates over a stationary suction box, normally placed at the top centre or rotated just down machine. Vacuum is pulled on the suction box, which draws water from the web into the suction box. From the suction roll the sheet feeds into the press section. Tissue machines typically form the paper web between a wire and a special fabric (felt) as they wrap around a forming roll. The web is pressed from the felt directly onto a large diameter dryer called a yankee. The paper sticks to the yankee dryer and is peeled off with a scraping blade called a doctor. Tissue machines operate at speeds of up to 2000 m/min. https://en.wikipedia.org/wiki/Paper_machine -------------------------------------------------- Note added at 1 hr (2015-10-24 23:54:37 GMT) -------------------------------------------------- Section 18 : Wet End Doctoring Systems Probably the most neglected pieces of equipment on the wet end of the paper machine are the doctoring systems. Doctoring systems serve the important and necessary functions such as roll cleaning, the removal of stock accumulations and the removal of water rings. A doctor is a "precision" piece of equipment . Good doctoring requires that the doctor be designed for the particular application, fabricated to close tolerances, correctly aligned and fitted to the roll and operated with the proper blade material, angle and pressure. The doctor blade holder is the portion of the doctor in which the doctor blade is held. The blade holder must provide flexibility between the doctor back and the blade. It also must permit free thermal expansion and contraction of the blade due to the blade holder and doctor blade generally being manufactured from different materials. The doctors listed below are ones on the wet end of our machines: 1 . Breast Roll Doctor The breast roll is probably the most critical of all fourdrinier doctoring applications. Stock or fiber buildup on the breast roll could expose the fabric to severe damage. Water ringing will cause wet streaks in the sheet and will destroy sheet formation. The breast roll doctor is manually loaded and the blade is made of a high density, high molecular weight, polyethylene material. https://industrydocuments.library.ucsf.edu/documentstore/k/n... -------------------------------------------------- Note added at 1 hr (2015-10-25 00:19:14 GMT) -------------------------------------------------- Neem ook het woord 'schaaf' in overweging: Schaven en Rakels De oppervlaktebehandeling van papier is één van de meest dynamische vakgebieden. De papierverwerkende industrie heeft te maken met steeds hogere of specifieke kwaliteits eisen. Maar ook de papiermaker zoekt naar mogelijkheden voor hogere websnelheden, betere vezelafdekking, egale verdeling en goede dwarsprofiel contrôle. Verder komen er nieuwe technieken beschikbaar die op hun beurt weer specifieke eisen stellen. De crêpe schaaf heeft de functie om de papierbaan, die zich aan de yankee heeft gehecht, af te schaven. Door de compressie actie op het papier ontstaat de typische crêpe structuur. Door de aandrukkracht en aandrukhoek te manipuleren, kan de papiermaker deze structuur beïnvloeden, om de gewenste kwaliteit te bereiken. Voor controle over het dwarsprofiel, verbetering van de afdekking en verhoging van de productiviteit bieden wij u de volgende oplossingen. http://www.inven.nl/schaven-rakels.html -------------------------------------------------- Note added at 2 hrs (2015-10-25 01:10:05 GMT) -------------------------------------------------- Als ik de naam zou mogen kiezen voor die 'doctor' bij die 'breast roll', op grond van de plaatjes die ik heb gezien en de beschrijvingen, zou ik kiezen voor 'schraapmes'. Een ander woord voor 'schraapmes' is 'rakel'. In ieder geval in de context van de diepdrukcylinder. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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