EP3931376A1 - Outil de formage et procédé de production d'un outil de formage pour l'extrusion de corps façonnés cellulosiques - Google Patents

Outil de formage et procédé de production d'un outil de formage pour l'extrusion de corps façonnés cellulosiques

Info

Publication number
EP3931376A1
EP3931376A1 EP20704557.6A EP20704557A EP3931376A1 EP 3931376 A1 EP3931376 A1 EP 3931376A1 EP 20704557 A EP20704557 A EP 20704557A EP 3931376 A1 EP3931376 A1 EP 3931376A1
Authority
EP
European Patent Office
Prior art keywords
molding tool
carrier
web
extrusion openings
nozzle body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20704557.6A
Other languages
German (de)
English (en)
Inventor
Markus Pichler
Christian SPERGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lenzing AG
Original Assignee
Lenzing AG
Chemiefaser Lenzing AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
Publication of EP3931376A1 publication Critical patent/EP3931376A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D01D4/022—Processes or materials for the preparation of spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof

Definitions

  • the invention relates to a molding tool for the extrusion of cellulosic moldings from a spinning mass, with an entry side and an exit side for the spinning mass, with at least one nozzle body, having a flat carrier with extrusion openings which penetrate the carrier from the entry side to the exit side and at the Exit side have an opening diameter and through which the spinning mass is extruded to form the cellulosic moldings.
  • the invention also relates to a method for producing the molding tool and a method for producing cellulosic moldings by the molding tool.
  • Molding tools for the extrusion of cellulosic moldings of the type mentioned at the beginning usually have to meet numerous high quality criteria in order to be suitable for spinning highly viscous cellulose solutions.
  • high requirements in terms of quality and dimensional accuracy (profile shape, mouth diameter and positioning) of the extrusion openings must be met in order to obtain a homogeneous bundle of shaped bodies and to avoid sticking of the individual shaped bodies in the shaped body bundle.
  • the roughness of the inner walls of the extrusion openings and the sharp edges and absence of burrs in the extrusion openings play a decisive role in shaping the molded bodies (which are formed from the extruded spinning mass on the exit side of the extrusion opening) and in avoiding spinning defects (such as breakage or tearing off) or gluing of moldings), caused for example by irregularities or burrs of the extrusion openings on the exit side arise.
  • spinning defects such as breakage or tearing off
  • gluing of moldings caused for example by irregularities or burrs of the extrusion openings on the exit side arise.
  • There are also high demands on the strength of the molding tools since they are exposed to very high pressures of up to 150 bar during the extrusion of the spinning mass.
  • WO 2005/005695 A1 shows a method for producing molding tools of the aforementioned type, the extrusion openings being introduced into a carrier of the molding tool by means of electron beams.
  • Such molds produced overcome the problem of the choice of material, since the extrusion openings can be made directly in the carrier, whereby a separate introduction of the extrusion openings in a platelet and expensive Subsequent assembly of the components is not necessary.
  • extrusion openings introduced into the molding tools by means of electron beams have an advantageously reduced roughness and high sharpness with a small burr.
  • the extrusion openings made in the carrier by electron beams are severely limited in their profile shape and have a high degree of scatter or tolerance in their mouth diameter, since the effect of the electron beams can only be controlled and reproduced to a limited extent.
  • the extrusion openings must be introduced by electron beams in a high vacuum, which in turn requires a complex manufacturing process. Disclosure of the invention
  • the invention solves the problem in that the ratio between the thickness of the carrier to the mouth diameter of the extrusion openings on the exit side is at least 6: 1, and that the extrusion openings were introduced into the carrier by applying laser energy. Is the ratio of the thickness of the support to the mouth diameter of the
  • Extrusion openings on the outlet side at least 6: 1 so a particularly pressure-resistant nozzle body with high strength can be created, which can ensure a long service life at high pressure.
  • This pressure stability means that plastic deformations of the nozzle body can be avoided during its service life under normal operating conditions, while a small amount of load-dependent elastic deformations is unavoidable.
  • This strength can be further improved if the above-mentioned ratio is at least 10: 1 or particularly preferably at least 12: 1 or at least 15: 1. If, in addition, the extrusion openings are made in the carrier by applying laser energy, the molding tool can be characterized by very simple producibility.
  • the extrusion openings can be introduced into the carrier of the molding tool with a very high degree of dimensional accuracy, so that a Form tool can be created that meets the high quality requirements and tight dimensional tolerances in terms of mouth diameter and positioning.
  • dimensional tolerances of the critical variables such as the mouth diameter, hole geometry and cross-section of the extrusion openings, and the distance between the extrusion openings of less than 2% can be achieved.
  • the laser radiation can also directly create smooth and burr-free extrusion openings, which means that further post-processing steps on the molding tool can be omitted.
  • Such post-processing steps, such as grinding or polishing require high mechanical loads and can produce adverse stress effects in the carrier. A particularly easy to manufacture and reliable molding tool with low dimensional tolerances can thus be created.
  • the filaments emerging from the extrusion openings are referred to as moldings, which can subsequently be used for the production of continuous or staple fibers.
  • Such filaments or fibers preferably have titers of greater than or equal to 0.7 dtex in the context of the invention.
  • the invention molding tools for the production of regenerated cellulosic moldings with an opening diameter of the extrusion opening on the outlet side of greater than or equal to 40 pm, in particular greater than or equal to 45 pm, preferably greater than or equal to 50 pm, particularly preferably between 70 pm and 150 pm, concerns. If the mouth diameter is below 40 ⁇ m, the molding tools are particularly suitable for the production of microfibers with a fiber titer of less than 0.7 dtex. However, the molding tools of the present invention are used in the production of cellulosic fibers with a titer of usually greater than or equal to 0.7 dtex, for which extrusion openings with an opening diameter greater than 40 ⁇ m are suitable.
  • the thickness of the carrier is at least 600 ⁇ m, a molding tool with sufficient strength and service life of the nozzle body can be created, which at the same time can be made large enough to enable an advantageous production throughput.
  • the preferred thickness of the carrier is at least 800 ⁇ m, or particularly preferably 1000 ⁇ m. If the carrier has a thickness in this range, it can be ensured that in regular operation, at operating pressures of up to 100 bar, such as in a process for the production of regenerated cellulosic molded bodies according to the Lyocell type (Lyocell process) are common, there is no plastic deformation of the carrier. A plastic deformation of the carrier can change the geometry of the extrusion openings disadvantageously as well as negatively affect the exit behavior of the moldings from the mold.
  • the carrier can be loaded with a pressure of up to 150 bar even in the event of overpressure events, without the carrier breaking or irreversible structural damage occurring.
  • Forming tools having a carrier with a thickness of less than 600 ⁇ m are only suitable to a limited extent for use in such processes, since they do not have the necessary strength to withstand the high pressures over the long term or allow only a very limited throughput. If the extrusion openings on the exit side are free of burrs, a
  • Forming tool are created in which a disadvantageous sticking of the molded body can be avoided after emerging from the extrusion openings.
  • Burrs on the extrusion openings can have the disadvantage that the extruded moldings do not just emerge from the extrusion openings, but are deflected by the burr and come into contact with an adjacent molding and stick together, causing spinning errors that result in an interruption and restart (re-spinning ) make the process necessary or lead to reject production.
  • the molding tool can have several such nozzle bodies.
  • the molding tool it is possible for the molding tool to have a plurality of rectangular nozzle bodies that adjoin one another. Such a molding tool can be manufactured particularly easily and can be more cost-effective.
  • the molding tool has at least one first web, which is materially connected to the nozzle body and protrudes from the nozzle body in the direction of the inlet side, then on the one hand the stability and strength of the carrier can be further improved, since the web counteracts a pressure load on the nozzle body or in particular the carrier, and on the other hand, a guide surface for the spinning mass can be created by the web, since this can ensure an efficient transport of the spinning mass to the extrusion openings. In addition, the formation of dead spaces is avoided by the suitable design of the web and thus the quality of the molded bodies extracted thereby is improved.
  • the strength of the carrier can be further increased significantly if the molding tool has at least one second web, the nozzle body extending between the first web and the second web.
  • the second web like the first web, is cohesively connected to the nozzle body and protrudes from the nozzle body in the direction of the inlet side.
  • the first and the second web can function in particular as an edge-side support of the nozzle body and thus reliably dissipate the pressure loads that act on the carrier during the extrusion.
  • the first and second webs can jointly form a channel for guiding the spinning mass on the entry side. A particularly reliable and stable molding tool can thus be created.
  • the molding tool can be particularly advantageous when the web extends at least in sections essentially normal to the nozzle body. Through the section which extends essentially normal to the nozzle body, the spinning mass can be directed strongly in the direction of the extrusion orifices and thus a directional mass flow can be maintained.
  • the mold can prove itself through excellent stability and resistance to deformation due to the high pressure of the spinning mass.
  • the first web can completely encircle the second web and thus a structurally particularly simple molding tool can be created.
  • This can be particularly suitable for use in a molding tool with an annular nozzle body, the annular nozzle body extending between the first and second webs.
  • the molding tool also has a flange with at least one flange leg on the inlet side, the flange leg connecting to the web, an easily manageable and flexibly replaceable molding tool can be created which can be quickly and easily attached to a spinning machine via the flange can.
  • the invention has the object of providing a simple and inexpensive method which nevertheless enables high precision.
  • a molding tool is produced according to one of claims 1 to 11, in which the extrusion openings are introduced into the carrier from the entry side of the molding tool by applying laser energy to the carrier and burr-free extrusion openings are generated in the carrier without further post-treatment on the exit side, In this way, a particularly simple and reproducible manufacturing process for molding tools can be created.
  • the use of laser radiation also makes complex post-treatment of the extrusion openings obsolete, since the extrusion openings introduced directly into the carrier can meet all of the quality criteria placed on the molding tools. This applies both to the roughness and absence of burrs in the extrusion openings, as well as to the positioning accuracy and the opening diameter.
  • laser energy is applied to the carrier by pulsed laser radiation, particularly low manufacturing tolerances can be maintained for the extrusion openings.
  • Laser radiation with a pulse duration between 100 fs and 100 ns and pulse energies between 1 pJ and 1000 pJ has proven to be particularly suitable.
  • the pulsed laser radiation can preferably be applied to the carrier in a percussion drilling process or a helical drilling process are applied and thus generate extrusion openings with high precision and low manufacturing tolerances.
  • the extrusion openings are introduced into the carrier after the integral connection of the carrier with a web, a particularly reliable and reproducible manufacturing process can be provided.
  • the production of a material connection between the carrier and a web inevitably leads to mechanical loads on the carrier material and thus to an undesirable impairment or change in the extrusion openings.
  • By subsequently introducing the extrusion openings into the fully assembled or fully formed molding tool such mechanical loading of the extrusion openings can be avoided, in particular if the introduction of the extrusion openings takes place as the last, final process step.
  • the molding tool according to the invention according to one of claims 1 to 11 can be particularly distinguished when it is used in a process for the production of regenerated cellulosic molded bodies in which a spinning mass containing cellulose is extruded through the molding tool and is precipitated in a spinning bath to produce the moldings.
  • Such a process can particularly preferably be a Lyocell process in which the spinning mass contains a tertiary amine oxide in which the cellulose is dissolved and the spinning bath has a mixture of water and tertiary amine oxide.
  • FIG. 1 shows a sectional view along l-l according to FIG. 2 of a molding tool according to a first embodiment
  • FIG. 2 shows a plan view of the molding tool according to FIG. 1,
  • FIG. 3 shows a broken sectional view along II-II according to FIG.
  • FIG. 4 shows a plan view of the molding tool according to FIG. 3
  • FIG. 5 shows a partially broken sectional view of a spinning machine with a molding tool according to the invention according to FIG. 1.
  • the molding tool 1 shows an annular molding tool 1 according to a first embodiment of the invention, which is used in a spinning device 100 according to FIG. 5 and in a method for extrusion of cellulosic molded bodies 4.
  • the molding tool 1 has an entry side 6 for the spinning mass 2 and an exit side 7 for the extruded spinning mass 3 (see FIG. 5).
  • a nozzle body 8 with a flat carrier 9 is provided in the mold 1.
  • the nozzle body 8 can be formed in one piece with the rest of the molding tool 1 (for example by deep drawing, milling, etc.), or connected to it in some other way (for example by welding, etc.).
  • the carrier 9 has extrusion openings 10 which penetrate it from the inlet side 6 to the outlet side 7.
  • the extrusion openings 10 form an opening 11 with an opening diameter 12.
  • the size of the mouth diameter 12 significantly influences the titer (or diameter) of the extruded cellulosic molded body 4.
  • the cross-sectional shape of the extrusion opening 10 can control the extrusion behavior and the geometry of the molded body 4.
  • the exit behavior of the spinning mass 2 from the extrusion openings 10 can be changed in order to prevent the extruded spinning mass 3 from sticking before it precipitates in the spinning bath 5.
  • Preferred cross-sectional shapes of the extrusion openings 10 can have a course that tapers towards the exit side 7, as is shown in FIG. 1.
  • the cross-sectional shape can, however, be varied as desired by the laser radiation, whereby, for example, hourglass-shaped courses that widen towards the exit side 7 are possible.
  • the extrusion openings 10 have an opening diameter 12 of between 70 and 150 ⁇ m. With such mouth diameters 12 it can be ensured that fibers or filaments with a titer of greater than 0.7 dtex are produced as extruded cellulosic molded bodies 4. In another In a preferred embodiment of the invention, regenerated cellulosic fibers with a titer between 1.0 and 2.5 dtex are produced.
  • the ratio between the thickness 13 of the carrier 9 and the mouth diameter 12 of the extrusion opening 10 is at least 6: 1, which ensures that the carrier 9 is sufficiently stable against the high pressures caused by the spinning mass 2.
  • a ratio of at least 10: 1, of at least 12: 1, or of at least 15: 1 is selected.
  • the thickness 13 of the carrier 9 is at least 600 ⁇ m.
  • the carrier 9 can thus permanently withstand a pressure load of up to 150 bar from the inlet side 6.
  • the preferred thickness 13 of the carrier 9 is at least 800 ⁇ m, or preferably 1000 ⁇ m, in order to guarantee a particularly high stability of the carrier 9.
  • the extrusion openings 10 were made in the carrier 9 by the application and action of laser energy in this.
  • the molding tool 1 can be manufactured very easily in terms of process technology.
  • the laser radiation acting in the material of the carrier 9 achieves particularly high dimensional accuracies in the positioning, dimensions and geometry of the extrusion openings 10.
  • the extrusion openings 10 have a constant mean distance 14 from one another, which is between 50 and 1000 ⁇ m, the standard deviation of the distance 14 being a maximum of 1%. In order to avoid the fibers sticking together when they exit the extrusion openings 10, larger distances 14 of 250 to 800 pm are usually used.
  • the extrusion openings 10 can be arranged in any regular pattern (for example radial, grid-shaped, etc.) or irregularly distributed over the carrier 9. A standard deviation of the mouth diameter 12 of less than 2% is also achieved by the laser radiation.
  • the extrusion openings 10 introduced into the carrier 9 by the laser radiation do not have any burrs on the exit side 7 after they have been introduced and therefore do not have to be subjected to further post-processing steps such as grinding or polishing, which can adversely affect the geometry of the extrusion openings 10.
  • the burr-free and smooth extrusion openings 10 further ensure that the individual strands of the Do not stick together extruded spinning mass 3 before precipitation to form bodies 4 in the spinning bath 5.
  • the molding tool 1 shown in FIGS. 1 and 2 with an annular nozzle body 8 has a first web 15 and a second web 16, which are both materially connected to the annular nozzle body 8.
  • the webs 15, 16 can be formed approximately in one piece with the carrier 9 of the nozzle body 8, for example by deep-drawing or milling the molding tool 1 as a whole, or, for example, by being welded to it in a materially bonded manner.
  • the annular nozzle body 8 extends between the first and second webs 15, 16. The webs 15 and 16 protrude from the nozzle body 8 in the direction of the inlet side
  • the webs 15, 16 act as edge-side supports for the carrier 9, which means that the carrier 9 can withstand a higher pressure load from the spinning mass 2. Due to the ring-shaped configuration of the nozzle body 8, the first web 15 completely surrounds the second web 16 and the nozzle body 8. The two webs 15 and 16 thus always run parallel to one another and maintain a constant normal spacing 17 transversely to the longitudinal extension 18 of the nozzle body 8, along the carrier 9, to one another. The normal distance 17 is at most 100 times the thickness 13 of the carrier 9 in order to ensure the maximum stability of the nozzle body 8. In the interior of the mold 1, the webs 15 and 16 act as
  • the webs 15, 16 thus form a guide channel 20 for the spinning mass 2 from the entry side 6.
  • the webs 15 and 16 extend, as shown in Fig. 1, preferably normal to
  • Nozzle body 8 and thus normal to the carrier 9.
  • the molding tool 1 also has a flange 23, via which the molding tool 1 can be connected to a spinning device 100 - as shown in FIG. 5.
  • the flange 23 has two flange legs 21, 22 which each adjoin the webs 15 and 16 on the inlet side 6 and which protrude outwardly from the webs 15 and 16 and thus the molding tool 1.
  • the flange legs 21, 22 do not hinder the guide channel 20 for the Spinning mass 2 and thus reliably avoid a negative influence on the flow conditions in the guide channel 20.
  • a molding tool 51 is shown according to a second embodiment, which has a plurality of rectangular nozzle bodies 58a, 58b, 58c.
  • the molding tool 51 like the molding tool 1, can be used in a spinning device 100 according to FIG. 5 and in a method for the extrusion of cellulosic molded bodies 3.
  • the molding tool 51 has an entry side 56 for the spinning mass 2 and an exit side 57 for the extruded spinning mass 3 (see FIG. 5).
  • the molding tool 51 has three nozzle bodies 58a, 58b and 58c, each of which includes a flat carrier 59a, 59b, 59c.
  • a molding tool 51 as shown in FIGS. 3 and 4 does not have to be limited to three nozzle bodies. Any other number and arrangement of nozzle bodies in the molding tool is also possible.
  • the nozzle bodies 58a, 58b, 58c are connected to the rest of the molding tool 51 in a materially bonded manner, preferably by weld seams 73.
  • the carriers 59a, 59b, 59c each have extrusion openings 60 which penetrate them from the entry side 56 to the exit side 57 and were introduced into them by the action of laser radiation.
  • the extrusion openings 60 each form an opening 61 with an opening diameter 62 on the outlet side 57.
  • the mouth diameter 62 can be varied in order to change the titer of the extruded cellulosic molded bodies 4.
  • the preferred opening diameter 62 of the extrusion openings 60 is between 70 and 150 ⁇ m in order to produce cellulosic molded bodies 4, in particular fibers, with a titer of greater than 0.7 dtex.
  • a standard deviation of the mouth diameter 62 of less than 1% is also achieved.
  • Regenerated cellulosic fibers with a titer between 1.0 and 2.5 dtex are particularly preferably produced.
  • the cross-sectional shapes of the extrusion openings 60 can also be changed as described for the first embodiment in order to control the exit behavior of the extruded spinning mass 3.
  • the carriers 59a, 59b, 59c of the nozzle bodies 58a, 58b, 58c have a preferred thickness 63 of at least 600 ⁇ m.
  • the thickness 63 is at least 800 ⁇ m, or at least 1000 ⁇ m, in order to obtain a particularly permanently stable molding tool 51 which can withstand the high pressures of up to 150 bar acting from the inlet side 56.
  • the ratio between the thickness 63 of the supports 59a, 59b, 59c and the opening diameter 62 of the extrusion openings 60 is at least 6: 1 in order to achieve the necessary stability. In preferred embodiments of the invention, the ratio is at least 10: 1, at least 12: 1, or at least 15: 1.
  • Extrusion openings 60 reached. As shown in FIG. 4, the extrusion openings 60 are arranged at a constant distance 64 from 50 to 1000 ⁇ m from one another, the
  • the molding tool 51 has first webs 65a, 65b, 65c, 65d, which are provided on the outside of the molding tool 51.
  • second webs 66a, 66b are provided, which extend in the form of ribs between the first webs 65c and 65d and are materially connected to them.
  • the nozzle bodies 58a and 58c extend transversely to their longitudinal extension 68 between a first web 65a, 65b and a second web 66a, 66b.
  • the nozzle body 58b extends between the second webs 66a, 66b.
  • Web 65a, 65b, 65c, 65d, 66a, 66b and supports 59a, 59b, 59c of the nozzle bodies 58a, 58b, 58c are materially connected to one another via weld seams 73.
  • the webs 65a, 65b, 65c, 65d, 66a, 66b are preferably designed together in one piece (e.g. as a milled, deep-drawn, rolled, etc. part) and protrude from the nozzle bodies 58a, 58b, 58c in the direction of the inlet side 56.
  • the webs 65a, 65b, 66a, 66b run parallel to each other and maintain a constant normal distance 67 (normal to the longitudinal extension 68) along the carrier 59a, 59b, 59c to each other.
  • the normal distance 67 is at most 100 times the thickness 63 of the supports 59a, 59b, 59c, so that the greatest possible stability of the nozzle bodies 58a, 58b, 58c is achieved.
  • the webs 65a, 65b, 65c, 65d, 66a, 66b act as guide surfaces 69 for the spinning mass 2.
  • the webs 65a, 65b, 65c, 65d, 66a, 66b act as guide surfaces 69 for the spinning mass 2.
  • a guide channel 70 is created from the inlet side 56, through which the spinning mass 2 is guided to the extrusion openings 60.
  • the molding tool 51 has a flange 73 via which the molding tool 51 can be positively connected to a spinning device 100.
  • the method for producing the regenerated molded bodies 4 is a Lyocell method in which the spinning mass 2 contains a solution of cellulose in a tertiary amine oxide.
  • the spinning bath 5 for precipitating the extruded spinning mass 3 contains a mixture of water and a tertiary amine oxide (for example NMMO - N-methylmorpholine-N-oxide).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Artificial Filaments (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un outil de formage (1, 51) pour l'extrusion de corps façonnés (4) cellulosiques à partir d'une matière de filage (2), pourvu d'un côté entrée (6, 56) et d'un côté sortie (7, 57) pour la matière de filage (2), d'au moins un corps d'injecteur (8, 58a, 8b, 58c), comprenant un support plan (9, 59a, 59b, 59c) doté de 5 ouvertures d'extrusion (10, 60) qui pénètrent dans le support du côté entrée (6, 56) au côté sortie (7, 57) et ont un diamètre d'ouverture (12, 62) du côté sortie (7, 57) et à travers lesquelles la matière de filage (2) est extrudée pour former les corps façonnés (4) cellulosiques. Selon l'invention, afin de fournir un outil de formage du type mentionné ci-dessus qui peut être produit plus facilement et à moindre coût tout en présentant une excellente résistance et stabilité à la pression, le rapport entre l'épaisseur (13, 63) du support (9, 59a, 59b, 59c) et le diamètre d'ouverture (12, 62) des ouvertures d'extrusion (10, 60) du côté sortie (7, 57) est d'au moins 6 : 1, de préférence au moins 10:1, et les ouvertures d'extrusion (10, 60) sont introduites dans le support (9, 59a, 59b, 59c) par application d'une énergie laser.
EP20704557.6A 2019-02-26 2020-02-19 Outil de formage et procédé de production d'un outil de formage pour l'extrusion de corps façonnés cellulosiques Withdrawn EP3931376A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19159270.8A EP3702496A1 (fr) 2019-02-26 2019-02-26 Outil de moulage et procédé de fabrication d'un outil de moulage destiné à l'extrusion de corps moulés cellulosiques
PCT/EP2020/054331 WO2020173783A1 (fr) 2019-02-26 2020-02-19 Outil de formage et procédé de production d'un outil de formage pour l'extrusion de corps façonnés cellulosiques

Publications (1)

Publication Number Publication Date
EP3931376A1 true EP3931376A1 (fr) 2022-01-05

Family

ID=65811997

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19159270.8A Withdrawn EP3702496A1 (fr) 2019-02-26 2019-02-26 Outil de moulage et procédé de fabrication d'un outil de moulage destiné à l'extrusion de corps moulés cellulosiques
EP20704557.6A Withdrawn EP3931376A1 (fr) 2019-02-26 2020-02-19 Outil de formage et procédé de production d'un outil de formage pour l'extrusion de corps façonnés cellulosiques

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19159270.8A Withdrawn EP3702496A1 (fr) 2019-02-26 2019-02-26 Outil de moulage et procédé de fabrication d'un outil de moulage destiné à l'extrusion de corps moulés cellulosiques

Country Status (7)

Country Link
US (1) US20220049375A1 (fr)
EP (2) EP3702496A1 (fr)
JP (1) JP2022521990A (fr)
CN (1) CN113508196A (fr)
BR (1) BR112021014216A2 (fr)
TW (1) TW202035808A (fr)
WO (1) WO2020173783A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397392B (de) 1989-11-29 1994-03-25 Chemiefaser Lenzing Ag Spinndüse
US5652001A (en) * 1993-05-24 1997-07-29 Courtaulds Fibres Limited Spinnerette
US5415697A (en) 1993-05-28 1995-05-16 Courtaulds Fibres (Holdings) Limited Cleaning of spinnerette jets
AT402738B (de) * 1993-07-28 1997-08-25 Chemiefaser Lenzing Ag Spinndüse
AT413545B (de) 2003-07-14 2006-03-15 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer formkörper
DE202013011959U1 (de) * 2012-08-22 2014-12-15 Deutsche Institute Für Textil- Und Faserforschung Denkendorf Direktgesponnene Cellulosefasern, deren Herstellung und Verwendung

Also Published As

Publication number Publication date
EP3702496A1 (fr) 2020-09-02
US20220049375A1 (en) 2022-02-17
TW202035808A (zh) 2020-10-01
BR112021014216A2 (pt) 2021-09-21
JP2022521990A (ja) 2022-04-13
WO2020173783A1 (fr) 2020-09-03
CN113508196A (zh) 2021-10-15

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