US 12,145,217 B2
Stencil device and method for stencil printing of brazing material onto a heat exchanger plate and use thereof
Sven Andersson, Hässleholm (SE); Tomas Dahlberg, Helsingborg (SE); and Niclas Bornegård, Bjärred (SE)
Assigned to SWEP INTERNATIONAL AB, Landskrona (SE)
Appl. No. 17/442,228
Filed by SWEP INTERNATIONAL AB, Landskrona (SE)
PCT Filed Apr. 1, 2020, PCT No. PCT/SE2020/050339
§ 371(c)(1), (2) Date Sep. 23, 2021,
PCT Pub. No. WO2020/204798, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 1950419-0 (SE), filed on Apr. 4, 2019.
Prior Publication US 2022/0184725 A1, Jun. 16, 2022
Int. Cl. B23K 3/08 (2006.01); B23K 1/00 (2006.01); B23K 3/06 (2006.01); B23K 37/04 (2006.01); B23K 37/06 (2006.01); F28D 9/00 (2006.01); F28F 3/10 (2006.01); B23K 103/04 (2006.01)
CPC B23K 3/0607 (2013.01) [B23K 1/0012 (2013.01); B23K 3/0638 (2013.01); B23K 37/0408 (2013.01); B23K 37/06 (2013.01); F28D 9/005 (2013.01); F28F 3/10 (2013.01); B23K 2103/05 (2018.08); F28F 2275/045 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A stencil device for simultaneous stencil printing of brazing material onto elevations, areas surrounding port openings, and a circumferential skirt of a heat exchanger plate, the stencil device comprises;
an upper stencil having openings for applying the brazing material to the elevations, ring-shaped openings for applying the brazing material to the areas surrounding port openings of the heat exchanger plate, and circumferential openings; and
a lower stencil printing stencil having an opening for receiving the heat exchanger plate and contacting an outer perimeter of the circumferential skirt of the heat exchanger plate, wherein an inner surface of the opening for receiving the heat exchanger plate and contacting an outer perimeter of the circumferential skirt of the heat exchanger plate comprises brazing material exits for applying the brazing material from the circumferential openings to the circumferential skirt.