US 11,731,310 B2
Device including an agitator shaft and a conveyor for applying a building material
Patrik Kuhn, Zürich (CH); Raphael Bourquin, Neerach (CH); Armin Brühwiler, Bütschwil (CH); and Didier Lootens, Küssnacht (CH)
Assigned to SIKA TECHNOLOGY AG, Baar (CH)
Appl. No. 16/634,395
Filed by SIKA TECHNOLOGY AG, Baar (CH)
PCT Filed Aug. 9, 2018, PCT No. PCT/EP2018/071638
§ 371(c)(1), (2) Date Jan. 27, 2020,
PCT Pub. No. WO2019/030329, PCT Pub. Date Feb. 14, 2019.
Claims priority of application No. 17185652 (EP), filed on Aug. 9, 2017.
Prior Publication US 2021/0114252 A1, Apr. 22, 2021
Int. Cl. B28B 1/00 (2006.01); B28C 5/40 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B28C 5/12 (2006.01); B01F 27/1121 (2022.01); B28C 5/08 (2006.01); B28C 5/14 (2006.01); B28C 5/02 (2006.01)
CPC B28B 1/001 (2013.01) [B28C 5/40 (2013.01); B01F 27/1121 (2022.01); B28C 5/026 (2013.01); B28C 5/0893 (2013.01); B28C 5/1292 (2013.01); B28C 5/148 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 13 Claims
OG exemplary drawing
 
1. A device for applying a building material, the device comprising:
a movement device configured to change an application site in a space;
a first component of the building material;
a second component of the building material; and
a mixer configured to mix the first component and the second component, the mixer comprising a drive, a mixing chamber provided with an agitator shaft having agitator elements having external threads and a conveyor device, and an outlet, the conveyor device being designed as a screw conveyor with windings,
wherein:
(1) the building material contains fibers, and at least one of:
(i) a distance between adjacent windings of the screw conveyor is at least 40% of a length of the fibers, and
(ii) a distance between adjacent agitator elements of the agitator shaft is at least 40% of a length of the fibers,
(2) the building material does not contain fibers, and at least one of:
(i) distances between adjacent windings of the screw conveyor are smaller, the closer the windings are arranged to the outlet, and
(ii) a distance between adjacent agitator elements of the agitator shaft is between 5 and 50 mm, or
(3) the first component contains an aggregate, and a distance between ends of the agitator elements of the agitator shaft and an inner wall of the mixing chamber is at least as large as a diameter of grains of the aggregate, and
the agitator shaft has depressions with internal threads, such that the agitator elements are configured to be inserted in and removed from the agitator shaft by rotation.