US 12,115,712 B2
Extruder for the extrusion of food or feed
Andreas Krische, Liyang (CN); Di Zhuang, Liyang (CN); and Urs Wuest, Uzwil (CH)
Assigned to Bühler AG, Uzwil (CH)
Appl. No. 16/978,494
Filed by BÜHLER AG, Uzwil (CH)
PCT Filed Mar. 12, 2019, PCT No. PCT/EP2019/056177
§ 371(c)(1), (2) Date Sep. 4, 2020,
PCT Pub. No. WO2019/175185, PCT Pub. Date Sep. 19, 2019.
Claims priority of application No. 18161204 (EP), filed on Mar. 12, 2018.
Prior Publication US 2021/0053268 A1, Feb. 25, 2021
Int. Cl. B29C 48/00 (2019.01); A23P 30/20 (2016.01); B29C 48/25 (2019.01); B29C 48/395 (2019.01); B29C 48/92 (2019.01)
CPC B29C 48/269 (2019.02) [A23P 30/20 (2016.08); B29C 48/0022 (2019.02); B29C 48/022 (2019.02); B29C 48/397 (2019.02); B29C 48/92 (2019.02); B29C 2793/0027 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A single screw extruder for extrusion of food or feed, the single screw extruder comprising in a direction of flow of a product to be extruded:
i) a processing section;
ii) a bypass outlet;
ii) a valve plate;
iii) a die plate;
iv) a cutter with at least one rotating knife in a cutter housing;
wherein the flow of product can be directed
through the valve plate under normal operating conditions of the extruder, and
through the bypass outlet, during start-up of the extruder or for maintenance purposes, downstream of the valve plate;
the valve plate (V) is arranged on or in a mounting plate;
the cutter housing and the mounting plate are provided with interacting guiding means that prevent rotation of the cutter housing vis-à-vis the mounting plate; and
the cutter housing and the mounting plate are mechanically fastened to each other by rotational locking means.