EP3985151B1 - Machine pour la préparation à la filature - Google Patents

Machine pour la préparation à la filature Download PDF

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Publication number
EP3985151B1
EP3985151B1 EP21201354.4A EP21201354A EP3985151B1 EP 3985151 B1 EP3985151 B1 EP 3985151B1 EP 21201354 A EP21201354 A EP 21201354A EP 3985151 B1 EP3985151 B1 EP 3985151B1
Authority
EP
European Patent Office
Prior art keywords
preparation machine
spinning preparation
perforated element
transport air
air outlet
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.)
Active
Application number
EP21201354.4A
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German (de)
English (en)
Other versions
EP3985151A1 (fr
Inventor
Alexis HIRT
Tobias WOLFER
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.)
Maschinenfabrik Rieter AG
Original Assignee
Rieter Ag
Maschinenfabrik Rieter 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.)
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Publication date
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Publication of EP3985151A1 publication Critical patent/EP3985151A1/fr
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Publication of EP3985151B1 publication Critical patent/EP3985151B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G13/00—Mixing, e.g. blending, fibres; Mixing non-fibrous materials with fibres

Definitions

  • the invention relates to a spinning preparation machine for mixing fibers, with a removal device for removing the fibers from the spinning preparation machine and with a filling device for filling the spinning preparation machine with fibers.
  • the spinning preparation machine is designed as a shaft mixer with at least two mixing chambers, wherein the filling device has a fiber material inlet and a transport air outlet with a transport air outlet channel and a distribution channel guided from the fiber material inlet to the transport air outlet via the at least two mixing chambers.
  • a fiber preparation plant in a spinning mill delivered fibers or fiber flakes are prepared for use in a spinning machine.
  • the fibers to be prepared for spinning go through several processing stages. In a first stage, the fibers are separated from fiber bales in the form of fiber flakes. So-called bale openers are usually used for this. These fiber flakes are removed from the bale opener via a pneumatic flake conveyor and, for example, taken to a subsequent cleaning machine.
  • the fiber flakes are usually conveyed into a mixer, which ensures that the fiber flakes are mixed through various shafts, for example.
  • the fibers are then removed from the mixer using a removal device, for example using a needle-lattice cloth, and transported further.
  • DE 37 13 5902 A1 discloses a mixer with several filling shafts. The filling shafts are filled simultaneously via the pneumatic transport system. By controlling the removal devices of the individual shafts, the fiber material is mixed thoroughly.
  • the EP 0 874 070 A1 a shaft mixer with several shafts.
  • the fiber material is distributed to the various shafts or chambers of the mixer by means of a pneumatic conveyor with the help of transport air.
  • the transport air is discharged from the chambers into an exhaust air duct via air-permeable side walls.
  • the shaft mixer is divided into various shafts, which are open at the top and are connected to the pneumatic conveyor line.
  • the incoming fiber flakes are evenly distributed to the various shafts via a distributor.
  • the shafts After the distributor, the shafts initially extend vertically before making a 90° bend, so that the shafts or their flake fillings now extend horizontally. Their horizontal extension ends in front of a ladder cloth, which passes all shafts, essentially in a vertical direction from bottom to top, and removes the fibers.
  • the mixer as a shaft mixer, the fibers are mixed thoroughly due to the different lengths of the shafts, i.e. the distances that the fibers have to travel, as the fibers fed to the mixer at different times and therefore from different bales are simultaneously removed from the different shafts by the removal device. This design of shaft mixers has proven itself.
  • the object of the invention is therefore to create a device which provides a simple separation of fiber material and transport air and at the same time avoids a different influence of the various filling levels of the shafts of the mixer by a shaft-by-shaft separation of the transport air from the fibers.
  • a novel spinning preparation machine for mixing fibers proposed with a removal device for removing the fibers from the spinning preparation machine and with a filling device for filling the spinning preparation machine with fibers.
  • the spinning preparation machine is designed as a shaft mixer with at least two shafts, wherein the filling device has a fiber material inlet and a transport air outlet with a transport air outlet channel and a distribution channel led from the fiber material inlet to the transport air outlet via the at least two shafts.
  • the distribution channel is separated from the transport air outlet by a perforated element.
  • the perforated element is designed with a convex shape seen in the direction of the transport air outlet.
  • a transport channel is provided as a filling device through which the fiber material is brought into the distribution channel with transport air as a fiber-air mixture.
  • the distribution channel is kept open towards the shafts. Due to the flow guided through the fiber material inlet, the transport air follows the distribution channel to the transport air outlet.
  • the transport air outlet is arranged on a side opposite the fiber material inlet so that the fiber-air mixture passes over the shafts. The fibers or fiber flakes fall down into the shafts.
  • the perforated element is installed as a curved element to separate the fiber material from the transport air and thus separates the distribution channel from the transport air outlet channel. The transport air passes through the perforation into the transport air outlet channel while the fiber material is held back.
  • the convex shape of the perforated element causes the fiber-air mixture to accelerate in the upper area of the distribution channel in front of the perforated element, which contributes to automatic cleaning of the perforated element. It has also been shown that the flows created in the distribution channel by the arrangement and shape of the perforated element, as well as the resulting pressure conditions in the individual shafts, are conducive to an even distribution of the incoming fibers into the shafts.
  • the positioning of the transport air outlet channel or the fiber material inlet in relation to the machine's longitudinal axis is not important.
  • the transport air outlet channel and the fiber material inlet can be provided either at the front or at the rear of the machine. This means that The machine can be ideally integrated into an existing fiber preparation plant in a spinning mill.
  • the fibers pass through the individual shafts and are mixed by a deflection and with the help of the removal device.
  • the principle of first vertical and then horizontal flow through the shafts before they reach the removal device is known from the state of the art.
  • a needle slat cloth can be used as an ascending conveyor as the removal device, which on the one hand removes the fibers from the various shafts and on the other hand transports the removed fibers to a fiber material outlet.
  • the shafts are advantageously surrounded by airtight shaft walls. Because the separation of the transport air from the fibers is concentrated on the transition from the distribution channel to the transport air outlet channel and does not occur in an uncontrolled manner via individual shaft walls, it is possible to fill the shafts evenly under constant flow and pressure conditions.
  • the distribution channel is surrounded on at least three sides by air-tight channel walls. Attempts in earlier designs to separate part of the transport air to the side of the distribution channel according to the distance traveled have proven to be disruptive. This is also due to the fact that the fiber-air mixture is not homogeneous and the load of the transport air with fiber material is subject to constant fluctuations. The risk of clogging of the air-permeable elements is also minimized, in particular due to the predictable flow and pressure conditions with a central separation of transport air and fibers. Due to the prevailing flow conditions and the pressure conditions in the shafts, the shafts are filled evenly even without corresponding guide elements such as flaps or sheets in the distribution channel.
  • the convex shape of the perforated element is formed from a series of flat sieve elements.
  • this is made by a series of flat sieve elements.
  • the individual sieve elements are joined together in such a way that that an overall convex shape of the perforated element is created.
  • the individual sieve elements have a corresponding perforation and are connected to one another, for example, by welding, gluing or screwing.
  • the perforated element can be formed from a flat sheet of metal using a corresponding bending process or by forming bending edges between the sieve elements. The bending edges are to be viewed as the boundary of the individual sieve elements.
  • the production of the perforated element can be simplified compared to production by rolling a sheet of metal to a large diameter and is more cost-effective.
  • a segment-by-segment construction of the convex perforated element has no decisive influence on the functioning of the perforated element or the flow conditions, provided the perforated element is made up of more than three sieve elements.
  • the convex shape preferably corresponds to a circular arc with a radius in a range from 200 mm to 1,000 mm, particularly preferably in a range from 400 mm to 800 mm.
  • the size of the radius to be selected depends on the size of the spinning preparation machine.
  • the perforated element preferably has a perforation of 20% to 50%. This means that at least 20%, but not more than 50% of the surface is perforated, i.e. there is between 0.2 cm 2 and 0.5 cm 2 of free passage in the perforated element per cm 2 of area. Too much perforation would result in good fibers passing through the holes or becoming caught in the holes and causing snags.
  • the perforated element is divided into at least two areas, wherein the areas have different perforations.
  • an upper half of the perforated element with a perforation of 28% and a lower Half of the perforated element is designed with a perforation of 21%. Due to the resulting flow conditions, the differential pressure can be evened out across the perforated element and the transport air is separated more evenly across the cross section of the perforated element.
  • This type of design of the perforated element is facilitated by a construction with sieve elements arranged in a row. More than two areas with different perforations are also conceivable. The individual sieve elements can easily be provided with different perforations.
  • the convex perforated element extends over an angle of more than 90 degrees. This increases the screen surface and also improves the flow conditions.
  • the flow conditions in front of the perforated element are also influenced in such a way that no or only a small amount of transport air is diverted from the distribution channel through the convex shape of the perforated element into the last shaft in front of the perforated element.
  • a cover element for setting a negative pressure in the transport air outlet channel is provided on a side of the perforated element facing the transport air outlet.
  • the cover element can be designed as a filter cloth or as a cover plate.
  • the perforation in the perforated element is formed by round or square openings with a cross-section of less than 0.1 cm 2.
  • the small cross-sectional size of the individual openings of the perforation prevents or at least It is strongly restricted that good fibres pass through the perforated element into the transport air outlet channel.
  • the perforated element is made of metal.
  • the perforated element is made of plastic. If the perforated element is made of metal, a small thickness, for example less than 1 mm, can be selected, which in turn leads to better cleaning by the flow passing over the perforated element due to the low edge height of the passages.
  • a perforated element made of plastic with sufficiently high stability and strength can also be used.
  • an air guide element is provided in the distribution channel above a shaft partition between two shafts.
  • the air guide element is designed as the upper end of the shaft partition.
  • the air guide element briefly accelerates the flow from the fiber material inlet to the transport air outlet, which leads to an improvement in the distribution of the fiber material to the shafts.
  • the air guide element is advantageously provided with a convex end in its shape against the distribution channel in order to prevent fibers from sticking.
  • the transport air outlet channel has a larger cross-section than the perforated element.
  • the transport air outlet channel is arranged in the shape of a hood around the perforated element at a certain distance.
  • the distance between a wall of the transport air outlet channel and the perforated element is preferably greater than 100 mm. This calms the flow and promotes a more even passage of the transport air through the perforated element.
  • a maintenance opening is preferably provided in the transport air outlet channel in order to be able to check the condition of the perforated element and, if necessary, to clean the transport air outlet channel. At least part of the maintenance opening is advantageously designed to be transparent.
  • the transport air outlet channel advantageously has a first section and a second section adjoining the first section, with the first section being guided along the perforated element and the second section being guided away from the perforated element.
  • the first section of the transport air outlet channel is adapted in its design to the convex perforated element so that an arc-shaped channel is created.
  • the transport air flowing through the perforated element into the first section of the transport air outlet channel is subsequently diverted and guided along the perforated element and reaches the second section of the transport air outlet channel at the end of the perforated element.
  • the first section and the second section of the transport air outlet channel are designed in their cross-section such that the transport air reaches a minimum speed of 12 m/s.
  • the value for the speed of the transport air in the transport air outlet channel is selected such that the dust that accumulates and the fiber residues that enter the transport air outlet channel through the perforation are entrained by the transport air. This can prevent an accumulation of dust and fiber residues in the transport air outlet channel.
  • a maintenance opening is preferably provided between the first section and the second section.
  • FIG 1 shows a schematic representation of a spinning preparation machine 1 according to the invention and Figure 2 a schematic representation of a section at point XX according to Figure 1 .
  • Shown is a spinning preparation machine 1 in the design of a shaft mixer with four shafts 2 to 5.
  • the individual shafts 2 to 5 are separated from one another by shaft partitions 17 to 19, with the separation being provided over the entire width B, but not over the entire height H of the shaft mixer.
  • the shafts 2 to 5 are provided as shafts 2 to 5 that are open at the top and bottom and are delimited on four sides.
  • the shaft 4 is delimited by the shaft partitions 17 and 18 and the shaft outer walls 19 and 20.
  • each shaft partition 17 to 19 a shaft partition end piece 20 is provided which directly connects to the shaft partition 17 to 19.
  • the shaft partition end piece 20 serves to redirect the fiber flow which slides downwards through the shafts 2 to 5 from a vertical to a horizontal movement.
  • the fiber material is introduced into the spinning preparation machine 1 in the form of a fiber-air mixture 7 through the fiber material inlet 6 with the aid of transport air 10 and is guided through a distribution channel 11 via the shafts 2 to 5 to the transport air outlet channel 9.
  • the distribution channel 11 is limited on three sides by an upper distribution channel wall 14 and two lateral distribution channel walls 15 and 16.
  • the distribution channel 11 is open opposite the shafts 2 to 5.
  • this demarcation of the distribution channel 11 is shown with the channel course 12 as an auxiliary line.
  • a perforated element 13 is inserted in the transition from the distribution channel 11 to the transport air outlet channel 9.
  • the perforated element 13 separates the distribution channel 9 from the transport air outlet channel 9. This separates the transport air 10 from the fiber material.
  • the perforated element 13 has a convex shape with a radius R when viewed in the direction from the fiber material inlet 6 to the transport air outlet 8.
  • air guide elements 21 are mounted above the shaft partition walls 17 to 19.
  • the transport air 10 is discharged from the transport air outlet channel 9 via the transport air outlet 8.
  • the transport air outlet channel 9 is designed in such a way that it hood-shaped around the perforated element 13 and is arranged with its walls at a distance A from the perforated element 13. This shape enables the transport air 10 to pass unhindered through the perforated element 13.
  • the fiber material is mixed by the deflection of the fiber material in the individual shafts 2 to 5 and the subsequent horizontal transport with the aid of the conveyor belt 24 to the removal device 25 as well as the in turn rising transport within the removal device 25.
  • the removal device 25 in the embodiment shown is formed by a rising slat cloth and a discharge roller.
  • the mixed fiber material is transferred from the removal device 25 into an outlet channel 26 which leads to the fiber material outlet 27.
  • Figure 3 shows a first embodiment of a perforated element 13 which is composed of a plurality of individual sieve elements 28.
  • the sieve elements 28 are designed as flat sieve surfaces provided with a perforation 30.
  • the perforation 30 is in Figure 3 shown schematically and extends evenly over all sieve elements 28 of the perforated element 13.
  • the sieve elements 28 are arranged one behind the other in such a way that a convex element 13 is formed in a circular arc with a radius R.
  • Figure 4 shows a second embodiment of a perforated element 13 which is also composed of individual sieve elements 28 arranged one behind the other.
  • the perforated element 13 is divided into two areas 29 and 31, whereby a first area 29 is designed with a perforation 30 which differs from the perforation 32 in the second area 31.
  • the perforation 30 in the first area 29 is larger than the perforation 32 in the second area 31. This results in a more even flow through the perforated element 13 over its entire length.
  • the perforations 30 and 32 are in Figure 4 shown schematically and extend evenly over the corresponding sieve elements 28 of the areas 29 and 31 of the perforated element 13.
  • the convex perforated element 13 extends over an angle ⁇ of more than 90 degrees. Due to the increased arc length of more than 90 degrees results in a better discharge of the transport air through the perforated element 13.
  • Figure 5 shows a schematic representation of a cross section of another embodiment of the transport air outlet channel 9.
  • the perforated element 13 is shown as a circular arc with a radius R and an angle ⁇ of more than 90 degrees.
  • the transport air outlet channel 9 consists of Figure 5 from a first section 35 which is arranged behind the perforated element 13 and a second section 36 following the first section 35 which brings the transport air 10 to the transport air outlet 8.
  • Arrows show the flow 33 of the transport air 10 guided through the perforated element 13 into a first section 35 of the transport air outlet channel 9 and from the first section 35 into the second section 36.
  • the transport air outlet 8 is shown as a flange by way of example.
  • a maintenance opening 34 is shown between the sections 35 and 36 of the transport air outlet channel 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (15)

  1. Machine de préparation à la filature (1) permettant de mélanger des fibres, comportant un dispositif d'évacuation (25) permettant d'évacuer les fibres de la machine de préparation à la filature et comportant un dispositif de remplissage permettant de remplir la machine de préparation à la filature (1) avec des fibres, dans laquelle la machine de préparation à la filature (1) est réalisée comme un mélangeur à cuve comportant au moins deux cuves (2-5), dans laquelle le dispositif de remplissage présente une entrée de matière fibreuse (6) et une sortie d'air de transport (8) comportant un canal de sortie d'air de transport (9) et un canal de distribution (11) guidé depuis l'entrée de matière fibreuse (6) vers la sortie d'air de transport (8) par l'intermédiaire des au moins deux cuves (2-5), caractérisée en ce que le canal de distribution (11) est séparé de la sortie d'air de transport (8) par un élément perforé (13), dans laquelle l'élément perforé (13) est réalisé avec une forme convexe vue en direction de la sortie d'air de transport (8).
  2. Machine de préparation à la filature (1) selon la revendication 1, caractérisée en ce que les cuves (2-5) sont entourées par des parois de cuves (17-20) imperméables à l'air.
  3. Machine de préparation à la filature (1) selon la revendication 1 ou 2, caractérisée en ce que le canal de distribution (11) est entouré au moins sur trois côtés par des parois de canal (14, 15, 16) imperméables à l'air.
  4. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que la forme convexe de l'élément perforé (13) est formée à partir d'éléments de tamisage (28) plans alignés.
  5. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que la forme convexe de l'élément perforé (13) correspond à un arc de cercle comportant un rayon (R) compris dans une plage allant de 200 mm à 1 000 mm.
  6. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que l'élément perforé (13) présente une perforation allant de 20 % à 50 %.
  7. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que l'élément perforé (13) est divisé en au moins deux zones (29, 31), dans laquelle les zones (29, 31) présentent des perforations (30, 32) différentes.
  8. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que l'élément perforé (13) convexe s'étend sur un angle (α) supérieur à 90 degrés.
  9. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce qu'un élément de recouvrement permettant de régler une dépression dans le canal de sortie d'air de transport (9) est prévu sur un côté de l'élément perforé (13) orienté vers la sortie d'air de transport (8).
  10. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que, dans l'élément perforé (13), la perforation est formée par des ouvertures rondes ou angulaires comportant une section transversale inférieure à 0,1 cm2.
  11. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que l'élément perforé (13) est fabriqué en métal.
  12. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que l'élément perforé (13) est fabriqué en matière plastique.
  13. Machine de préparation à la filature (1) selon au moins une des revendications précédentes, caractérisée en ce qu'un élément de guidage d'air (21) est prévu dans le canal de distribution (11) respectivement au-dessus d'une paroi de séparation de cuves (17, 18) entre deux cuves (4, 5).
  14. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que le canal de sortie d'air de transport (9) présente une première section (35) et une seconde section (36) suivant la première section (35), dans laquelle la première section (35) est guidée le long de l'élément perforé (13) et la seconde section (36) est guidée à l'écart de l'élément perforé (13).
  15. Machine de préparation à la filature (1) selon au moins l'une des revendications précédentes, caractérisée en ce que le canal de sortie d'air de transport (9) est réalisé de telle sorte que l'air de transport (10) atteint une vitesse minimale de 12 m/s.
EP21201354.4A 2020-10-13 2021-10-07 Machine pour la préparation à la filature Active EP3985151B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01297/20A CH717947A1 (de) 2020-10-13 2020-10-13 Spinnereivorbereitungsmaschine zum Mischen von Fasern.

Publications (2)

Publication Number Publication Date
EP3985151A1 EP3985151A1 (fr) 2022-04-20
EP3985151B1 true EP3985151B1 (fr) 2024-08-21

Family

ID=80685614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21201354.4A Active EP3985151B1 (fr) 2020-10-13 2021-10-07 Machine pour la préparation à la filature

Country Status (3)

Country Link
EP (1) EP3985151B1 (fr)
CN (1) CN114351297B (fr)
CH (1) CH717947A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH719434A1 (de) * 2022-02-18 2023-08-31 Rieter Ag Maschf Spinnereivorbereitungsmaschine zum Mischen von Fasern.

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
BE505323A (fr) * 1950-11-22 1900-01-01
DE3632934A1 (de) * 1986-09-27 1988-04-14 Spinnbau Gmbh Anordnung zum beschicken einer vorrichtung zur herstellung eines faservlieses
DE3713590A1 (de) 1987-04-23 1987-10-08 Hergeth Hubert Schachtmischer
WO1990009471A1 (fr) * 1989-02-17 1990-08-23 Hergeth Hollingsworth Gmbh Dispositif et procede de chargement pneumatique de puits de remplissage
DE3941729A1 (de) * 1989-12-18 1991-06-20 Truetzschler & Co Vorrichtung zum mischen von textilfasern, wie baumwolle, chemiefasern u. dgl.
DE4026330A1 (de) * 1990-08-20 1992-02-27 Rieter Ag Maschf Putzereilinie
DE4111894A1 (de) * 1991-04-12 1992-10-15 Truetzschler & Co Vorrichtung zum mischen von textilfasern, wie baumwolle, chemiefasern u. dgl.
DE19716792A1 (de) 1997-04-22 1998-10-29 Rieter Ag Maschf Spinnereivorbereitungseinrichtung
EP0877105A1 (fr) * 1997-05-07 1998-11-11 Maschinenfabrik Rieter Ag Appareil de préparation à la filature
EP0877104A1 (fr) * 1997-05-07 1998-11-11 Jossi Holding AG Appareil pour le traitement d'un courant de matière fibreuse dans une installation pour la préparation de fibres
DE19806891B4 (de) * 1998-02-19 2015-10-29 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung in der Spinnereivorbereitung zum Abscheiden und Beschicken von Fasermaterial, z. B. Baumwolle und dgl. zu einer Verarbeitungsmaschine
DE19847237B4 (de) * 1998-02-19 2012-01-26 TRüTZSCHLER GMBH & CO. KG Vorrichtung in der Spinnereivorbereitung zum Abscheiden von Fremdstoffen an einer schnellaufenden Walze zum Öffnen von Fasermaterial, z. B. Baumwolle u. dgl.
DE10007509A1 (de) * 2000-02-18 2001-08-23 Ake Innotech Gmbh Automatisier Verfahren und Vorrichtung zum Nachbehandeln von in rotierenden Bearbeitungsstationen gewonnenen Naturfaser-/Störstoffgemischen
EP1136598A1 (fr) * 2000-03-20 2001-09-26 Maschinenfabrik Rieter Ag Dispositif de traitement de fibres
EP1279756A3 (fr) * 2001-07-27 2003-11-12 Maschinenfabrik Rieter Ag Dispositif de filage pneumatique et procédé de filage pneumatique
CN105113056B (zh) * 2015-07-29 2017-07-14 李先登 圆环仓式集收混棉喂给机及其工作方法
CN207079319U (zh) * 2017-05-25 2018-03-09 宜城市天舒纺织有限公司 一种多仓混棉机
CN209584441U (zh) * 2019-02-15 2019-11-05 郑州宏大新型纺机有限责任公司 一种适用于多仓混棉机棉箱喂入的导流活门装置

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Publication number Publication date
EP3985151A1 (fr) 2022-04-20
CH717947A1 (de) 2022-04-14
CN114351297B (zh) 2026-03-24
CN114351297A (zh) 2022-04-15

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