MOLDING TOOL AND METHOD FOR PRODUCING A MOLDING TOOL FOR EXTRUDING CELLULOSE MOLDED BODIES
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United States of America Patent
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Issued Date -
Feb 17, 2022
app pub date -
Feb 19, 2020
filing date -
Feb 19, 2020
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Abstract
The invention relates to a molding tool (1, 51) for the extrusion of cellulosic molded bodies (4) from a spinning dope (2), having an entry side (6, 56) and an exit side (7, 57) for the spinning dope (2), with at least one nozzle body (8, 58a, 58b, 58c) including a planar carrier (9, 59a, 59b, 59c) with extrusion openings (10, 60) that penetrate the carrier from the entry side (6, 56) to the exit side (7, 57) and have a mouth diameter (12, 62) at the exit side (7, 57) and through which the spinning dope (2) is extruded into the cellulosic molded bodies (4). In order to provide a molding tool of the afore-mentioned type, which is easier and more inexpensive to manufacture while providing excellent strength and pressure stability at the same time, it is proposed that the ratio of the thickness (13, 63) of the carrier (9, 59a, 59b, 59c) to the mouth diameter (12, 62) of the extrusion openings (10, 60) at the exit side (7, 57) be at least 6:1, preferably at least 10:1, and that the extrusion openings (10, 60) be formed in the carrier (9, 59a, 59b, 59c) by applying laser energy.
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