Global Patent Index - EP 1020561 A2

EP 1020561 A2 2000-07-19 - Method and device for producing moulded articles from viscous pulp

Title (en)

Method and device for producing moulded articles from viscous pulp

Title (de)

Verfahren und Vorrichtung zur Herstellung von Formkörpern aus viskosen Massen

Title (fr)

Procédé et dispositif pour la fabrication d'objets moulés de masses visqueuses

Publication

EP 1020561 A2 (DE)

Application

EP 00250009 A

Priority

  • DE 19901359 A
  • DE 19904568 A

Abstract (en)

To shape a body from a viscose mass, of paper and/or paper fibers in water together with fibers and/or chips of vegetable and wood materials, it is poured into a mold for water to be extracted and then dried. The mass to fill the mold contains 80-95 wt% water, 10-40 wt% paper fibers and 60-90 wt% chopped straw, chaff and/or other vegetable fibers. To shape a body from a viscose mass it is poured into a mold for water to be extracted and then dried. The mass is passed into the mold in an accurate charge, with the water content to be extracted taken into account. Core dies are moved into the mold, to form mold passages and walls. A die compresses the material mass in the mold at a pressure of 500-2000 kPa for a few secs. to extract water, and the shaped mass is taken from the mold. The shaped body is dried in an air stream at 30-60 degrees C. Additives such as chopped straw and chaff, plant fibers and the like are added to the mixture of used paper dissolved in the water. After the application of pressure for a few secs., the die (15) is raised slightly, the core die is moved downwards and the frame (16) with the molds is moved upwards, so that the transport unit (18) can be moved under the mold frame (16). The mold frame (16) is moved upwards further, to press against the die for the molded bodies to be ejected downwards on to the transport unit (18) to be carried to the drying kiln. An Independent claim is included for an assembly with a feed line (3) which is moved between end positions over the dosing supply containers (4) packed together without gaps, and a funnel (5). The funnel (5) is linked to the mixer/supply container (6). A pump (7) gives a continuous and uninterrupted delivery of the mass from the mixer/supply container (6) through the feed line (3) to the dosing containers (4). A frame (8) to carry the containers (4) has a swing axis (10) for them, and the frame (8) slides between end positions (C,D). Hoses (12) are at the dosing containers (4) over the swing axis (10) to carry the molding mass from the tilted containers (4) into the molds, with their ends at adjustable mountings on struts (13) which are fitted to the frame (8) and slide with it. A guide frame (14) has a number of dies (15). A frame (16) holds the molds. A frame (17) carries the core dies. A horizontal transport unit (18) takes off the ejected moldings. The assembly has a control to set the working operations, the successive movements and the movement path lengths. Preferred Features: One or more dosing containers (4) are fitted for each mold. A scraper plate (11) is at the struts (13), to give a scraping action to the mold openings on a retracting movement. The hoses (12) can be used in a variety of configurations for one or more molds.

Abstract (de)

Die Dosierbehälter (4) werde über die Zuführleitung (3) gefüllt und sobald die Zuführleitung (3) die Endstellung B erreicht hat, wird der Förderstrom über den Trichter (5) in den Vorratsbehälter (6) zurückgeführt und von da mittels der Pumpe 7 kontinuierlich weiter gefördert. Gleichzeitig werden die Dosierbehälter (4) auf der Führung (9) von der Endstellung C zur Endstellung D verschoben und angekippt, so daß die Masse über die Schläuche (12) in die im Rahmen (16) angeordneten Formen fließt. Nun werden die Kernstempel von unten eingefahren, wodurch sich eine Vorverdichtung ergibt. Mit dem Rückbewegung des Gestells (8) werden die Formen und Kernstempel oben durch das an den Streben (13) angeordnete Abstreifblech (11) abgestrichen und der Preßstempel (15) senkt sich auf die Formen und drückt auf den gesamten Querschnitt der Füllung. Diese wird gepreßt und ein Teil des Wassers ausgetrieben und abgesaugt. Nach einigen Sekunden Pressung wird der Preßstempel (15) leicht angehoben, um eine Entlüftung zu erzielen. Nunmehr werden die Kernstempel nach unten und der Rahmen (16) mit den Formen nach oben gefahren, so daß die Transporteinrichtung (18) unter den Formenrahmen (16) fahren kann. Anschließend wird der Formrahmen (16) weiter angehoben, wodurch die Formkörper gegen die Preßstempel gedrückt und abgestreift werden. Die Formkörper fallen auf die Transporteinrichtung (18), die diese zum Trockenofen fördert. <IMAGE>

IPC 1-7 (main, further and additional classification)

D21J 3/00

IPC 8 full level (invention and additional information)

D21J 3/00 (2006.01)

CPC (invention and additional information)

D21J 3/00 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1020561 A2 20000719; EP 1020561 A3 20010117

INPADOC legal status


2003-03-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020801

2001-10-04 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-03-21 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010119

2001-01-17 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-01-17 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-07-19 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI