US 12,441,038 B2
Injection molding tool and method for the production thereof, and method for producing marbled molded parts
Reinhard Jakobi, Ludwigshafen (DE); Susanne Zeiher, Ludwigshafen (DE); Angelika Homes, Ludwigshafen (DE); Sascha Tim Schwendy, Ludwigshafen (DE); Natascha Manuela Meierhoefer, Ludwigshafen (DE); and Daniel Leutz, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/768,281
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Oct. 13, 2020, PCT No. PCT/EP2020/078774
§ 371(c)(1), (2) Date Apr. 12, 2022,
PCT Pub. No. WO2021/074148, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 19203163 (EP), filed on Oct. 15, 2019; and application No. 20172936 (EP), filed on May 5, 2020.
Prior Publication US 2024/0131762 A1, Apr. 25, 2024
Prior Publication US 2024/0227261 A9, Jul. 11, 2024
Int. Cl. B29C 45/16 (2006.01); B29C 45/00 (2006.01); B29C 45/20 (2006.01); B29C 45/30 (2006.01); B29C 45/50 (2006.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01); B29C 33/38 (2006.01); B29K 67/00 (2006.01); B29K 105/00 (2006.01); B29L 31/00 (2006.01)
CPC B29C 45/1634 (2013.01) [B29C 45/0046 (2013.01); B29C 45/16 (2013.01); B29C 45/20 (2013.01); B29C 45/30 (2013.01); B29C 45/50 (2013.01); B33Y 80/00 (2014.12); B29C 33/3842 (2013.01); B29C 2045/1698 (2013.01); B29C 2045/308 (2013.01); B29K 2067/006 (2013.01); B29K 2105/0032 (2013.01); B29K 2995/0021 (2013.01); B29L 2031/7132 (2013.01); B33Y 10/00 (2014.12)] 12 Claims
OG exemplary drawing
 
1. An injection mold for production of marbled moldings, comprising
at least one hot runner, a cavity, an entry opening into the injection mold and an inlet into the cavity, wherein the hot runner has at least two ducts that are connected at a first end of each duct to the inlet into the cavity and at a second end of each duct to the entry opening into the injection mold, wherein the at least two ducts each at least partly form a spiral and the at least two ducts are bounded by a one-piece component, wherein the at least two ducts are separated from one another between their first end and their second end by the one-piece component, wherein the at least two ducts each have a center axis, and the center axis is arranged in the form of the spiral around a longitudinal hot runner axis, and the spiral has different slopes at each of at least two different positions, and wherein the at least two ducts are configured to counteract homogeneous mixing.