US 12,420,517 B2
Method for dry-forming cellulose products from a cellulose blank structure in a product forming unit and a product forming unit
Olle Högblom, Gothenburg (SE); Ove Larsson, Västra Frölunda (SE); Martin Ljungberg, Gothenburg (SE); Edward Guidotti, Gothenburg (SE); Björn Arlerot, Gothenburg (SE); and Patrik Larsson, Kärna (SE)
Assigned to PulPac AB, Västra Frölunda (SE)
Appl. No. 18/285,623
Filed by PulPac AB, Västra Frölunda (SE)
PCT Filed Apr. 8, 2022, PCT No. PCT/EP2022/059512
§ 371(c)(1), (2) Date Oct. 4, 2023,
PCT Pub. No. WO2022/218873, PCT Pub. Date Oct. 20, 2022.
Claims priority of application No. PCT/EP2021/059810 (WO), filed on Apr. 15, 2021; application No. PCT/EP2021/059811 (WO), filed on Apr. 15, 2021; and application No. 2151618-2 (SE), filed on Dec. 23, 2021.
Prior Publication US 2024/0181740 A1, Jun. 6, 2024
Int. Cl. B31F 1/00 (2006.01); B27N 1/00 (2006.01); B27N 3/00 (2006.01); B27N 3/04 (2006.01); B27N 3/18 (2006.01); B27N 5/00 (2006.01); B30B 1/10 (2006.01); B30B 9/28 (2006.01); B30B 15/30 (2006.01); B31B 50/00 (2017.01); B31B 50/10 (2017.01); B31B 50/59 (2017.01)
CPC B31F 1/0077 (2013.01) [B27N 1/00 (2013.01); B27N 3/007 (2013.01); B27N 3/04 (2013.01); B27N 3/18 (2013.01); B27N 5/00 (2013.01); B30B 1/10 (2013.01); B30B 9/28 (2013.01); B30B 15/30 (2013.01); B30B 1/103 (2013.01); B31B 50/006 (2017.08); B31B 50/102 (2017.08); B31B 50/59 (2017.08)] 23 Claims
OG exemplary drawing
 
1. A method for dry-forming cellulose products from a cellulose blank structure in a product forming unit, wherein the product forming unit comprises a blank dry-forming module and a pressing module, wherein the cellulose blank structure is air-formed in the blank dry-forming module onto a forming wire, wherein the pressing module comprises one or more forming molds for forming the cellulose products from the cellulose blank structure in a pressing operation, wherein the method comprises the step of:
arranging the forming wire in a stationary mode during the pressing operation, wherein the pressing module is a cellulose product toggle pressing module for forming the cellulose products from the cellulose blank structure, wherein the method further comprises the steps of;
providing the cellulose product toggle pressing module having a toggle press and the one or more forming molds, wherein the toggle press includes a pressing member movably arranged in a pressing direction, a toggle-mechanism connected to the pressing member, a pressing actuator arrangement connected to the toggle-mechanism, and an electronic control system operatively connected to the pressing actuator arrangement, and wherein the one or more forming molds each includes a movable first mold part attached to the pressing member and a stationary second mold part,
installing the toggle press with the pressing direction of the pressing member arranged primarily in a horizontal direction, with the pressing direction in parallel with the horizontal direction,
feeding the cellulose blank structure into a pressing area defined by the first and second, spaced apart, mold parts,
controlling operation of the pressing actuator arrangement by the electronic control system for driving the pressing member using the toggle-mechanism in the pressing direction and forming the cellulose products from the cellulose blank structure by pressing each first mold part against the stationary second mold part.