US 12,070,872 B2
Method for foaming chipboards with tubes and a chipboard with tubes
Sebastian Heim, Gotha (DE); Steffen Donath, Gotha (DE); and Lars Kloeser, Arnsberg (DE)
Assigned to SAUERLÄNDER SPANPLATTEN GMBH & CO. KG, Arnsberg (DE)
Filed by SAUERLÄNDER SPANPLATTEN GMBH & CO. KG, Arnsberg (DE)
Filed on Jan. 28, 2022, as Appl. No. 17/587,010.
Claims priority of application No. 21154104 (EP), filed on Jan. 28, 2021.
Prior Publication US 2022/0234244 A1, Jul. 28, 2022
Int. Cl. B27M 1/08 (2006.01); B27N 3/00 (2006.01); B27N 7/00 (2006.01); B29C 44/18 (2006.01); B29C 70/74 (2006.01); E04C 2/24 (2006.01)
CPC B27N 3/005 (2013.01) [B27M 1/08 (2013.01); B27N 7/00 (2013.01); B29C 44/18 (2013.01); B29C 44/186 (2013.01); B29C 70/747 (2013.01); E04C 2/243 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for foaming chipboards with tubes (10) comprising a board body (14) interspersed by tubes (12) and having surfaces comprising an upper face and a lower face (16, 18), said method comprising the steps of
providing a chipboard with tubes (10),
defining one or more machining regions (20) on the upper face and/or the lower face (16, 18) of the chipboard with tubes (10),
introducing a foam-forming material into at least one of the above-mentioned tubes (12) in the machining region (20) in order to locally reduce the difference in density between the tubes (12) and the board body (14),
machining the machining regions (20).