EP 3976331 B1 20240207 - METHOD AND DEVICE FOR PRE-HEATING A PRESSED MATERIAL MAT
Title (en)
METHOD AND DEVICE FOR PRE-HEATING A PRESSED MATERIAL MAT
Title (de)
VERFAHREN UND VORRICHTUNG ZUR VORWÄRMUNG EINER PRESSGUTMATTE
Title (fr)
PROCÉDÉ ET DISPOSITIF DE PRÉCHAUFFAGE D'UNE NATTE DE MATIÈRE À PRESSER
Publication
Application
Priority
- DE 102019114021 A 20190524
- EP 2020062857 W 20200508
Abstract (en)
[origin: WO2020239394A1] The invention relates to a method for pre-heating a pressed material mat (2) before feeding same into a press (4), in particular in the course of producing wood material boards. The pressed material mat (2) runs through a double-belt pre-heating device (3) with an upper continuously circulating gas-permeable transport belt (5a) and a lower continuously circulating gas-permeable transport belt (5b), wherein the pressed material mat (2) is supplied with a heated fluid which contains steam, and the pressed material mat is thereby heated. The method is characterized in that the pressed material mat (2) is first supplied with a steam-air mixture with a set dew point in a first stage by means of a first heating unit (7) in the double-belt pre-heating device (3), said steam-air mixture flowing through the mat from one surface to the opposite surface and thereby heating the mat to a temperature (T1) over the entire thickness of the mat. The pressed material mat (2) is then supplied with steam or a steam-air mixture on both sides in a second stage by means of a second heating unit (9) in the double-belt pre-heating device (3), whereby solely the top layers close to the surface are heated to a second temperature (T2) which is higher than the first temperature (T1).
IPC 8 full level
B27N 1/00 (2006.01); B27N 3/02 (2006.01); B27N 3/04 (2006.01); B27N 3/18 (2006.01); B27N 3/24 (2006.01); B30B 5/06 (2006.01); B30B 9/24 (2006.01); B30B 15/06 (2006.01); B30B 15/30 (2006.01); B30B 15/34 (2006.01)
CPC (source: CN EP)
B27N 1/00 (2013.01 - CN EP); B27N 3/18 (2013.01 - CN EP); B27N 3/24 (2013.01 - CN EP); B30B 5/06 (2013.01 - CN EP); B30B 15/064 (2013.01 - CN EP); B30B 15/308 (2013.01 - CN EP); B30B 15/34 (2013.01 - CN EP); B27N 3/02 (2013.01 - CN EP); B27N 3/04 (2013.01 - CN EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102019114021 B3 20201112; CN 113748004 A 20211203; CN 113748004 B 20230428; EP 3976331 A1 20220406; EP 3976331 B1 20240207; EP 3976331 C0 20240207; WO 2020239394 A1 20201203
DOCDB simple family (application)
DE 102019114021 A 20190524; CN 202080030287 A 20200508; EP 2020062857 W 20200508; EP 20725482 A 20200508