CPC B28B 3/269 (2013.01) [B23P 15/243 (2013.01); B29C 48/07 (2019.02); B29C 48/11 (2019.02); B29C 48/12 (2019.02); B29C 48/2566 (2019.02); B29C 48/25686 (2019.02); B29C 48/269 (2019.02); B29C 48/3003 (2019.02)] | 20 Claims |
1. An extrusion mouthpiece, comprising:
a mouthpiece frame;
a first plate;
a second plate; and
a plurality of cores,
wherein:
the mouthpiece frame is between the first and second plates;
the first plate is fastened to an upstream end of an opening of the mouthpiece frame;
each core has an upstream end and a downstream end opposite its upstream end;
the upstream end of each core is rigidly connected to the first plate;
the downstream end of each core is removably held by the second plate; and
the second plate is configured to be axially movable relative to the first plate, the mouth piece, and the plurality of cores by extrusion material during extrusion.
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14. A method of extruding a formed body, the method comprising:
conveying a molding compound in a flow direction through a plurality of molding compound passage openings of a first core retaining plate attached to a mouthpiece frame, the molding compound surrounding a plurality of cores connected to the first core retaining plate as the molding compound flows towards a second core retaining plate, the molding compound forming a formed body with internal channels defined by the cores;
moving the second core retaining plate in the flow direction with the formed body until the second core retaining plate is removed from downstream ends of the cores;
removing the second plate; and
continuing to convey the molding compound.
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