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EP3765660A1 - Dispositif d'injection de pigment liquide dans un flux fondu de polymère liquide en fusion - Google Patents

Dispositif d'injection de pigment liquide dans un flux fondu de polymère liquide en fusion

Info

Publication number
EP3765660A1
EP3765660A1 EP19710676.8A EP19710676A EP3765660A1 EP 3765660 A1 EP3765660 A1 EP 3765660A1 EP 19710676 A EP19710676 A EP 19710676A EP 3765660 A1 EP3765660 A1 EP 3765660A1
Authority
EP
European Patent Office
Prior art keywords
paint
channel
feed
melt
valve
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Withdrawn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
EP19710676.8A
Other languages
German (de)
English (en)
Inventor
Dietrich Witzler
Arkardiusz Tomzik
Heike JUNGBLUTH
Uwe WENDE
Joachim Fries
Ulrich Helbing
Michael Schröder
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Oerlikon Textile GmbH and Co KG
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 Oerlikon Textile GmbH and Co KG filed Critical Oerlikon Textile GmbH and Co KG
Publication of EP3765660A1 publication Critical patent/EP3765660A1/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Withdrawn legal-status Critical Current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
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D01D1/065—Addition and mixing of substances to the spinning solution or to the melt; Homogenising
    • 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
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • 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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/04—Pigments
    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/06—Dyes

Definitions

  • the invention relates to a device for feeding liquid paint into a melt stream of molten polymer according to the preamble of claim 1.
  • a generic device is known for example from EP 1054083 Al.
  • a feed lance is shown, by means of which liquid color is fed to a melt stream.
  • This feed lance is used in a melt spinning device for synthetic polymers, by means of which threads can be produced.
  • a polymer such as e.g. a polyester or a polyamide is melted by means of an extruder and fed to a spinning beam.
  • This spinneret has a plurality of spinnerets having a plurality of nozzle bores through which the polymer is extruded. From each nozzle bore, a filament is extruded from a plurality of filaments, a thread is formed in the subsequent process.
  • the threads are subjected to various treatment steps in order to finally be wound into coils.
  • the feed lance is arranged in a melt channel, by means of which the extruder is connected to one of the spinnerets.
  • the feed lance is arranged directly in front of the spinneret, so that the path between the feed lance and the spinneret is as short as possible. A sufficient mixing is ensured by means of a static mixer.
  • the feed lance protrudes into the melt channel. It has a color channel through which the liquid color flows.
  • the color channel ends in several paint nozzles through which the liquid paint leaves the feed lance to come into first contact with the liquid polymer.
  • the ink channel is thus surrounded by hot polymer during operation of the melt spinning apparatus and separated from this hot polymer only by the wall of the feed lance.
  • a check valve is arranged within the color channel near the inlet. Most of the paint channel is located downstream of the check valve.
  • the liquid paint usually consists of a carrier liquid which is mixed with color particles and / or dyes and with other additives.
  • liquid paint instead of liquid paint, other liquid additives are supplied with the feed additive.
  • Other liquid additives are e.g. Ethylene glycol for reducing melt viscosity, flame retardants, UV stabilizers or cleaning fluids for melt lines.
  • other liquid additives can be supplied to the melt stream by means of the paint nozzle and the paint channel.
  • liquid paint also applies mutatis mutandis to other liquid additives.
  • a paint nozzle can be closed from the outside, so that the inflow of liquid paint into a melt stream is interrupted.
  • the ink supply can be interrupted quickly and safely.
  • This allows operation of a parent extrusion or melt Spinning device without ink supply.
  • it is intended to be possible to produce various products, for example threads of different colors.
  • uncoloured threads are required, which should not be changed until they are finished or not at all in their color.
  • the device according to the invention thus leads to the greatest possible flexibility of the system with respect to the coloring of a melt stream of the extrusion or melt spinning device and thus the color of the products to be produced.
  • Closing the paint nozzle from the outside prevents melt from flowing through the paint nozzle into a paint channel of a feed lance. Blockages of the feed lance by polymer to be processed thus do not occur.
  • the closure of the paint nozzle allows a fast change between two different colors, because an unwanted and uncontrolled outflow of liquid paint through the closure is effectively prevented by the closure from the outside. Furthermore, the closure makes it possible to clean the feed lance from outside during the operation of the extrusion or melt spinning device without this being adversely affected.
  • the feed lance is movably held in a direction perpendicular to the melt stream.
  • an optimal position of the feed of the liquid color into the melt stream can be set, which may differ depending on the process conditions. So is an optimal mixing between the liquid color and the melt stream reachable.
  • the direction of movement of the feed lance perpendicular to the melt stream it is meant that a substantial proportion of the direction of movement is perpendicular to the melt flow, which does not exclude that a portion of the direction of movement parallel to the melt stream is present.
  • the feed lance could therefore also be guided back and forth between different positions at an angle to the flow direction of the melt stream.
  • This mobility of the feed lance also allows it to lead out of the melt stream. This can either take place completely, so that any influence on the melt flow through the feed ring is completely avoided, or at least partially, so that in particular a color channel of the feed lance can be led out of the melt stream.
  • thermally decomposed liquid paint would interfere with the restarted process, possibly even completely interrupt and lead to errors in the final product, so that it may no longer be usable.
  • an axis of the paint nozzle is aligned parallel to the flow direction of the polymer.
  • a housing has a valve bore for guiding the feed lance.
  • the melt channel is furthermore arranged in the housing.
  • Part of the valve bore is a valve seat, which serves to define an infeed position of the feed lance.
  • This valve seat could for example be a recess in the valve bore, on which a projection of the feed lance is stored.
  • a flushing chamber with adjoining flushing channel is also arranged in the housing.
  • the feed lance can be guided back and forth between the feed position and a flushing position in which the ink nozzle of the feed lance is located in the flushing chamber.
  • the feed lance can be cleaned in the rinsing position.
  • a flushing fluid is pumped through the paint channel of the feed lance and discharged again through the flushing channel, without such a flushing fluid comes into contact with the melt stream from which the final product is to be produced.
  • the color change times can be significantly reduced with the help of this rinsing chamber.
  • flushing fluids can be selected concretely with respect to their task of cleaning the feed lance, without paying attention to their processibility in a melt spinning plant got to.
  • a more efficient cleaning is possible, which in addition has a positive effect on the time required for cleaning.
  • the paint residues are completely removed from the feed lance, so that they do not lead to clogging of the feed lance, as it could happen without rinsing.
  • the feed lance is designed at least in two parts. It has a valve body and a valve head.
  • the feed lance is thus designed as a valve, so that the paint nozzle of the feed lance with the feed lance itself can be closed without any further components. This makes it possible to close the paint nozzle, regardless of the position in which the feed lance is currently located.
  • the paint nozzle can thus be opened and closed again both in the melt channel and in the rinsing chamber.
  • the opening and closing of the paint nozzle is very defined and in a short time. This has a positive effect on the process transitions.
  • transitions include the start and termination of an ink feed into the melt, as well as the initiation and termination of the purge with the feed lance in the purge position.
  • the other embodiments relate to the constuction of the feed lance as a valve and lead to a particularly simple cost-effectively producible and yet stable feed lance. Stability is of particular interest, since there are high pressures in the melt stream and, consequently, the liquid paint must additionally be supplied at high pressure.
  • Fig.l schematically shows a sectional view of a first embodiment of the device according to the invention with an open feed lance in a feed position
  • FIG. 2 is a schematic sectional view of the first embodiment of the device according to the invention with a closed feed lance in the feed position
  • FIG. 3 is a schematic sectional view of the first embodiment of the device according to the invention with the closed feed lance in a rinsing position
  • FIG. 4 schematically shows a sectional view of the first exemplary embodiment of the device according to the invention with the open supply in the rinsing position
  • FIG. 5 is a schematic sectional view of a second embodiment of the device according to the invention.
  • FIGS. 1-4 schematically show a sectional view of a first exemplary embodiment of the device according to the invention.
  • 1 shows an open feed lance in a feed position
  • FIG. 2 shows a closed feed lance in the feed position
  • FIG. 3 shows the closed feed lance in a rinse position
  • FIG. 4 shows the opened feed lance in the rinse position.
  • a housing 1 serves to receive a melt channel 5 and a feed lance 8.
  • the feed lance 8 is arranged perpendicular to the melt channel 5.
  • the feed lance 8 is designed in two parts and consists of a valve body 9 and a valve head 12.
  • the valve body 9 is guided in a valve bore 2 and the valve head 12 in a valve head bore 4 of the housing 1.
  • the valve bore 2 and the valve head bore 4 have a common axis and lie on opposite sides of the melt channel 5.
  • a seal 15.1 for the valve body 9 and a seal 15.2 for the valve head 12 are arranged in the housing 1 adjacent to the melt channel 5.
  • the seal 15.1 thus seals between the housing 1 and the valve body 9 and the seal 15.2 between the housing 1 and the valve head 12.
  • the valve body 9 and the valve head 12 are each held separately displaceable.
  • valve bodies 9 likewise has a section of larger diameter and a section of smaller diameter, so that the movement of the valve body 9 towards the melt channel 5 is limited by the valve seat 3.
  • This position in which the valve body 9 rests against the valve seat 3, is called a feed-in position. Further details will be described later, if the function of the feed lance 8 is discussed in more detail.
  • a rinsing chamber 6 enclosing the feed lance 8 is arranged in the housing 1. In order to be able to conduct a flushing fluid through this flushing chamber 6, a flushing passage 7 penetrates the housing 1.
  • the feed lance 8 has a paint channel 10, through which liquid paint can be fed.
  • the paint channel 10 terminates in a paint nozzle 11, through which the liquid paint can flow out of the feed lance 8 again.
  • the ink channel 10 is partially arranged in the valve body 9, then it continues to form in the valve head 12.
  • the ink nozzle 11 is thus also located in the valve head 12.
  • the valve head 12 protrudes partially into the valve body 9, both in the open position and in the closed position of the feed lance 8.
  • the color channel 10 is thus reduced in its diameter analogously to the wall thickness of the part of the valve head 12 which extends into the valve body 9.
  • the following section deals with the function of the device during its operation. In this case, a melt of molten polymer flows through the melt channel 5.
  • an extrusion die After the melt has left the device according to the invention, it is extruded by means of an extrusion die.
  • This tool can take on a wide variety of forms, for example, it could be designed as a spinneret. Such spinnerets have a plurality of nozzle bores through which individual filaments are extrudable. In a follow-up process, threads can be made from these filament bundles.
  • a color is added to the melt in the device according to the invention. This color is in order to achieve a fast and good mixing with the melt can also in liquid phase before.
  • the liquid paint is fed under pressure to the feed lance 8. It flows through the ink channel 10 and leaves the feed lance 8 via the ink nozzle 11.
  • the feed lance 8 is located in the feed position shown in FIG. 1, in which the ink nozzle 11 is located in the melt channel 5. Furthermore, the feed lance 8 is opened, so that the flow through the feed lance 8 with the liquid paint is possible.
  • the liquid color mixes with the melt stream after it has left the feed lance 8, so that this melt stream assumes the desired color. Static mixers placed after the feed can further enhance this mixing. In order to interrupt the ink feed into the melt stream, the feed lance 8 is brought into a closed position, as shown in FIG.
  • valve body 9 and the valve head 12 are moved against each other.
  • the valve head 12 is pushed further into the valve body 9 so that two sealing surfaces 14 of the valve body 9 and the valve head 12 lying opposite each other touch each other.
  • the paint nozzle 11 is closed in this position by the wall of the valve body 9.
  • the feed lance 8 is brought into a rinsing position shown in FIGS. 3 and 4.
  • actuators such as pneumatic cylinders.
  • FIG. 3 the feed lance 8 is still closed in order to start the rinsing process, the feed lance 8 is in turn opened by displacing the valve body 9 relative to the valve head 12. This open position of the feed lance 8 in the washing chamber 6 is shown in Fig. 4.
  • a rinsing fluid of the feed lance 8 is supplied under pressure and passed through the ink channel 10. This will remove the remaining color.
  • soiling such as degraded polymer can be removed.
  • the rinsing fluid leaves the paint channel 10 of the feed lance 8 through the paint nozzle 11, including the above-described residues of the undesired color and possible dirt. From the paint nozzle 11, the mixture flows into the washing chamber 6. In the further course, it leaves the washing chamber 6 through the flushing channel 7 to be disposed of or recycled outside the housing 1 of the feed lance 8 professionally.
  • the feed lance 8 is closed again, so that it is available for a new production of a different colored product. If desired, the feed lance 8 is successively returned to the feed position and into its open position to introduce a new, different liquid color into the melt stream. If production without the supply of liquid paint is desired, the feed lance 8 remains in the rinsing position in order to prevent the polymer present in the feed lance 8 from being exposed to the high temperature of the melt stream. By closing the feed lance 8 and by rinsing it outside the melt channel 5, particularly fast color changes are possible.
  • Fig. 5 a second embodiment of the invention is shown in a sectional view.
  • the same reference numerals are used as in the first embodiment. Since the first and the second embodiment are similar in many parts, will be discussed in the following particular to the differences.
  • the main difference is that the feed lance 8 in the second embodiment is not designed as a valve valve body 9 and valve head 12 itself. Thus, the valve head bore 4 is eliminated.
  • the valve bore 2 is likewise present, in which the feed lance 8 is displaceably arranged. 5, the feed lance 8 is in a feed position, by means of dashed lines two further, by the axial displacement of the feed lance 8 possible positions are shown.
  • there is also a rinsing position in which the paint nozzle 1 1 of the feed lance 8 is in the washing chamber 6.
  • the ink nozzle 11 is located in the area of the housing 1. This position is located between the feed position and the rinsing position. In this intermediate position, the ink nozzle 11 is closed by the housing 1, so that the ink feed is interrupted or not possible in the melt stream.
  • the operation of this second embodiment is analogous to the first, so it will not be discussed in detail at this point. Only the closing of the feed lance 8 takes place in different ways, as just described.
  • the paint nozzle 11 is arranged in the feed lance 8 such that the feed Anze 8 forms a part of the wall of the melt channel 5 in the intermediate position with its front side.
  • the color nozzle 11 could also be arranged in the feed lance 8, that this flowing transition between the end face of the feed lance 8 and the wall of the melt channel 5 in the rinsing position arises.
  • a third embodiment of the invention is shown in FIG.
  • the same reference numerals are used as for the first embodiment. Since structure and function largely correspond to those of the first exemplary embodiment, only the differences are discussed below.
  • the first and the third embodiment differ in the expression of the transition between valve body 9 and valve head 12.
  • a part of the valve body 9 projects into the valve head 12 and not vice versa.
  • a recess 13 is provided in the valve head 12, into which the tip of the valve body 9 protrudes, or in which the tip of the valve body 9 is guided.
  • the paint channel 10 thus forms exclusively in the valve body 9.
  • the color nozzle 11 thus also arranged in the valve body 9 is designed to be closable by means of the valve head 12. This is done by means of a side wall of the valve head 12 which is formed by the recess 13.
  • the valve body 9 and valve head 12 are displaced relative to one another in order to close the paint nozzle 11.
  • liquid additives can also be supplied with the feed lance instead of liquid paint, for example ethylene glycol to reduce the melt viscosity, flame retardants, UV stabilizers or cleaning fluids for melt lines can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

L'invention concerne un dispositif d'injection de pigment liquide et/ou d'additif liquide dans un flux fondu de polymère liquide en fusion. C'est à cela que sert une lance d'injection, laquelle comporte un canal de pigment pour l'introduction du pigment liquide et/ou de l'additif liquide, un orifice de sortie du canal de pigment étant conçu sous forme de buse de pigment. Dans de tels dispositifs, le changement entre par ex. différents pigments ou une production incolore est problématique. Du rebut est produit lors de ces processus de changement. Selon l'invention, un tel changement de pigment est réalisé rapidement et sans heurts parce que la buse de pigments peut être fermée de l'extérieur, de sorte que l'afflux du pigment liquide et/ou de l'additif liquide est interrompu dans le flux fondu.
EP19710676.8A 2018-03-15 2019-03-12 Dispositif d'injection de pigment liquide dans un flux fondu de polymère liquide en fusion Withdrawn EP3765660A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018002088 2018-03-15
PCT/EP2019/056110 WO2019175142A1 (fr) 2018-03-15 2019-03-12 Dispositif d'injection de pigment liquide dans un flux fondu de polymère liquide en fusion

Publications (1)

Publication Number Publication Date
EP3765660A1 true EP3765660A1 (fr) 2021-01-20

Family

ID=65763462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19710676.8A Withdrawn EP3765660A1 (fr) 2018-03-15 2019-03-12 Dispositif d'injection de pigment liquide dans un flux fondu de polymère liquide en fusion

Country Status (2)

Country Link
EP (1) EP3765660A1 (fr)
WO (1) WO2019175142A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3795255B2 (ja) 1999-05-21 2006-07-12 旭貿易株式会社 紡糸原料着色装置
DE10233468A1 (de) * 2002-07-24 2004-02-12 Barmag Ag Vorrichtung und Verfahren zum Einspeisen einer flüssigen Farbe in eine Polymerschmelze
ATE518634T1 (de) * 2007-09-27 2011-08-15 Sulzer Chemtech Ag Vorrichtung zur erzeugung einer reaktionsfähigen fliessfähigen mischung und deren verwendung

Also Published As

Publication number Publication date
WO2019175142A1 (fr) 2019-09-19

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