EP4328363A1 - Chapeau fixe pour une carde - Google Patents

Chapeau fixe pour une carde Download PDF

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Publication number
EP4328363A1
EP4328363A1 EP23180834.6A EP23180834A EP4328363A1 EP 4328363 A1 EP4328363 A1 EP 4328363A1 EP 23180834 A EP23180834 A EP 23180834A EP 4328363 A1 EP4328363 A1 EP 4328363A1
Authority
EP
European Patent Office
Prior art keywords
profile
exhaust pipe
end pieces
fixed lid
fixed cover
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.)
Pending
Application number
EP23180834.6A
Other languages
German (de)
English (en)
Inventor
Lars Weisigk
Mark Meier
Michael GULDIMANN
Esther SPALINGER
Martin Tobler
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
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.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP4328363A1 publication Critical patent/EP4328363A1/fr
Pending legal-status Critical Current

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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
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/34—Grids; Dirt knives; Angle blades
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
    • D01G15/24—Flats or like members
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/76—Stripping or cleaning carding surfaces; Maintaining cleanliness of carding area
    • D01G15/80—Arrangements for stripping cylinders or rollers
    • D01G15/805—Arrangements for stripping cylinders or rollers by suction or blowing

Definitions

  • the invention relates to a fixed cover for a card for processing fibers.
  • the fixed cover has a fixed cover length which corresponds to a working width of the card.
  • the fixed lid has a base body with knife elements attached to it, the knife elements having a working direction.
  • Cards are used in spinning preparation systems, which contain various work elements for cleaning, sorting, opening, carding, etc. of the fiber material to be processed.
  • a wide variety of types of fibers are processed, including cotton fibers or chemical fibers or mixtures thereof.
  • separation knives To separate short fibers and trash parts, working elements in the form of fixed lids with knife elements, so-called separation knives, are used.
  • the trash parts or short fibers are separated by the separation knife from a rotating drum, with the help of which the fiber material is transported past the fixed lids.
  • an opening is provided in front of the separation knife in the working element against the surface of the rotating drum and the fiber material transported on it.
  • the opening serves as an ejection opening for the components separated from the fiber material by the separation knife. After the components separated by the separation knife have passed the ejection opening, they are fed to a suction channel and conveyed away.
  • Separation knives of various designs are used in cards during spinning preparation.
  • Fixed lids of this type are known in various designs.
  • WO2010/003265 a fixed lid, which consists of two parts that are held together with a clamp. The two parts form the suction channel, with a separation opening facing the drum between the two components and a single separation knife in the form of a knife blade that extends over the working width being provided on one of the two components.
  • This type of fixed lid is constructed with an additional upstream guide surface and a downstream one Carding surface for the separation of dirt and short fibers, due to the use of individual knife blades, takes up a large part of the available peripheral area of the drum opposite them and therefore only a small number of separation knives can be used.
  • the object of the present invention is now to propose a fixed lid which does not have the disadvantages mentioned of the known prior art and enables a low overall height of the fixed lid.
  • a fixed cover for a carding machine with a fixed cover length and with a base body and with knife elements attached to the base body and with an exhaust pipe is proposed.
  • the knife elements have a working direction.
  • the working direction corresponds to the sequence of separating knives and separating openings arranged in the knife element, with the separating opening being arranged upstream of the associated separating knife when viewed in the working direction.
  • the base body is formed at least from a first profile and a second profile and two end pieces, the first profile being arranged in front of the second profile when viewed in the working direction.
  • the end pieces are provided on both sides outside the length of the fixed cover and the first profile and the second profile are arranged between the end pieces and attached to the end pieces.
  • the first profile and the second profile are not directly connected to each other, but are shared by the common End pieces held in position.
  • the profiles are preferably fastened to the end pieces using screws, but other types of fastening such as welding, gluing or a connection using quick-release fasteners are also conceivable.
  • pins can be used for fastening and positioning.
  • the first profile and the second profile are connected by the knife element attached to them.
  • the knife elements are preferably attached to the profiles with screws.
  • the knife elements span a distance between the first profile and the second profile, viewed in the working direction.
  • the knife elements to be advantageously used for such fixed lids have a large number of knife blades and are made, for example CH 715 974 A1 known.
  • Such knife elements are formed from a sheet metal, with the ejection openings in the sheet metal being formed in the form of passage openings and the knife blades being formed by edges of the passage openings.
  • the ejection openings of all knife blades of a knife element can be assigned to a single common suction channel. The dimensions, number and arrangement of the knife blades or ejection opening are possible in many variations.
  • the dimensioning of the knife elements themselves can also be adapted to their application, so that fixed lids with a large extension in the working direction can be imagined through an appropriate choice of length and width.
  • the knife elements are made of wear-resistant steel, such as spring steel sheet.
  • the knife elements are subjected to a hardening process, for example surface hardening or nitriding, or are provided with a coating, for example a metal oxide coating.
  • the exhaust pipe is arranged between the first profile and the second profile and is held by the end pieces. Furthermore, the arrangement of the exhaust air pipe, viewed in the working direction, between the profiles and the end pieces and an attachment of the exhaust air pipe only to the end pieces make it possible to easily expand the exhaust air pipe in the radial direction. As soon as the fasteners on the end pieces are loosened, the exhaust pipe can be placed between the profiles for cleaning purposes can be lifted out without having to remove the fixed cover itself. After removing the exhaust pipe, the exhaust pipe itself and the blade element can be cleaned. By arranging the exhaust air pipe between the profiles in the working direction, a low overall height of the fixed cover is also achieved.
  • the exhaust pipe is guided over the entire length of the fixed cover between the end pieces and held on the end pieces; this can be done, for example, with a direct screw connection, a flange connection or other suitable connections.
  • the fixed cover has a suction channel, which is formed by the exhaust pipe with a first surface facing the knife elements and the knife elements and is delimited by the first profile, the second profile and the end pieces. Because the suction channel is limited on one side by the exhaust pipe, the exhaust pipe is arranged at a minimum distance above the knife element.
  • the height of the exhaust air pipe results in a lower height than with conventional circular cross sections. This also contributes to a reduction in the overall height of the fixed cover.
  • the exhaust pipe between the end pieces is open to the first profile or the second profile in such a way that a connection of the suction channel and an interior of the exhaust pipe is formed over the fixed cover length between the end pieces.
  • the cross-section of the exhaust pipe is three-quarters closed and has a slot-shaped opening along the length of the fixed cover.
  • the slot-shaped opening is directed towards the first profile or the second profile and extends between the two end pieces over the entire length of the fixed cover.
  • a seal is provided between the exhaust pipe and the first profile or the second profile on a side of the exhaust pipe facing away from the suction channel.
  • the seal is provided over the entire length of the opening between a side of the slot-shaped opening facing away from the knife elements and the first profile. The arrangement of the opening and the seal creates a connection between the interior of the exhaust pipe and a side of the knife elements facing the exhaust pipe.
  • the exhaust air pipe is open to the first profile and is provided with a seal and has a distance from the second profile, an inlet channel being formed between a second surface of the exhaust air pipe facing the second profile and the second profile.
  • the arrangement of the slot-shaped opening against the first profile results in a flow direction in the suction channel counter to the working direction of the knife elements when the exhaust pipe is subjected to a negative pressure.
  • a flow direction in the suction channel in the working direction would also be conceivable.
  • the suction of the knife elements against the working direction has the advantage that entrained fibers cannot lie around the ejection openings, but are sucked into the suction channel according to their fiber position.
  • the second surface of the exhaust pipe facing the second profile forms the inlet channel, which is connected to the suction channel along the exhaust pipe. Air is directed through the inlet channel from above the fixed lid into the suction channel. Due to the air supplied to the suction channel, a smaller amount of air is sucked through the ejection openings of the knife elements. This leads to a low flow speed through the ejection openings and thus prevents material fibers from being sucked out of the fiber material that is guided past the fixed lid.
  • the exhaust air pipe is open to the second profile and is provided with a seal and has a distance from the first profile, with an inlet channel between a second surface of the exhaust air pipe facing the first profile is formed.
  • the flow direction in the suction channel is reversed.
  • a deflection surface is provided in a transition from the inlet channel into the suction channel, the deflection surface being formed by the second surface of the exhaust air pipe or an air guide element attached to the exhaust air pipe.
  • the transition from the inlet channel to the suction channel must be designed according to flow-related aspects. Accordingly, in a first alternative, an appropriate shape of the exhaust air pipe must be provided.
  • the second surface of the exhaust air pipe is transferred into the first surface of the exhaust air pipe with a flow-optimized course of the deflection surface, so that the deflection surface between the first and the second surface of the exhaust air pipe together with the opposite surfaces of the second profile and the knife element result in a trouble-free flow channel.
  • an air guide element forming the deflection surface is attached to the exhaust air pipe, for example glued or screwed.
  • the use of an air guide element has the advantage that flow-related aspects do not have to be taken into account in the design and manufacture of the exhaust pipe and the exhaust pipe can be manufactured cheaply. It is also possible to use different air guide elements for different applications while maintaining the same exhaust pipe design.
  • a throttle element for adjusting a cross section of the inlet channel is advantageously provided in the inlet channel.
  • the throttle element can be used to adjust the amount of air that is sucked in through the inlet channel.
  • the throttle element forms a constriction in the inlet channel, advantageously in front of the deflection surface. It has been shown that a channel width of 1 mm to 30 mm, preferably 5 mm to 15 mm, is sufficient for most applications.
  • the design of the throttle element can be provided as a simple attachment part that narrows the cross section of the inlet channel, which is on the exhaust pipe or on the second profile is attached. In this version, the cross section is adjusted by replacing the throttle element.
  • Attachment to the exhaust pipe is advantageous since the exhaust pipe can be replaced without removing the fixed cover.
  • a further development of the throttle element can consist of the throttle element being movably attached to the exhaust air pipe and the cross section of the inlet channel can therefore be adjusted from outside the fixed cover.
  • a shape of the first surface of the exhaust pipe facing the knife elements is adapted to a course of the knife elements in the working direction.
  • the knife elements attached to the profiles have a curvature which is adapted to the geometric and process engineering conditions of the surfaces facing the fixed lid in order to achieve optimal processing of the fiber material guided past the fixed lid.
  • Different arrangements and size ratios of the ejection openings in the knife elements are also possible.
  • the suction channel must be designed for a flow that meets the needs.
  • the shape of the first surface of the exhaust pipe is designed in accordance with these requirements. By simply replacing the exhaust air pipe, the geometry of the suction channel can be adjusted or adjusted. Alternatively, the first surface of the exhaust pipe can also be adjusted in height, for example by means of a height-adjustable fastening of the exhaust pipe.
  • the first surface of the exhaust air pipe can be formed by a guide element placed on the exhaust air pipe.
  • Placing a guide element on the exhaust air pipe has the advantage that the geometry of the exhaust air pipe itself can be simplified and selected independently of the design of the suction channel that is necessary for flow technology.
  • the guide element is attached or glued to the exhaust pipe, for example with screws. The use of a guide element allows the use of a uniform exhaust pipe, as the Formation of a suction channel tailored to a specific process or installation location is determined by the guide element.
  • the suction channel is designed to open in cross section against the working direction.
  • Such a conical design of the cross section of the suction channel results in uniform flow conditions in the suction channel when viewed over the working direction.
  • the conical design of the suction channel makes it possible to compensate for the pressure conditions in the suction channel that change in the working direction due to one-sided suction. As a result, all ejection openings in the knife elements are subjected to the same negative pressure, which leads to uniform excretion and equal utilization of all ejection openings.
  • the suction channel has a conically tapering shape over the length of the fixed lid. If the exhaust air pipe is suctioned on one side, viewed in the direction of the fixed cover length, the cross section of the suction channel remains the same, resulting in an uneven pressure distribution in the opening of the exhaust air pipe over the fixed cover length. In order to achieve a uniform negative pressure in the direction of the fixed lid length and thus to be able to achieve the full potential of the separation effect, a corresponding continuous cross-sectional narrowing of the exhaust air duct is advantageous. Alternatively, a corresponding reduction in the slot width of the opening of the exhaust pipe over the length of the fixed cover is also conceivable. Accordingly, if the exhaust air pipe is suctioned on both sides, as seen in the direction of the fixed cover length, a cross-sectional narrowing of the exhaust air duct starting from a center of the fixed cover or a reduction in the slot width is advantageous.
  • At least one intermediate rib piece is provided between the end pieces in the length of the fixed cover.
  • the intermediate rib piece serves to connect the first profile with the second profile in the working direction.
  • the profiles are attached to at least one intermediate rib piece.
  • Cards are built with different working widths, Working widths of one to one and a half meters are common today. So that the profiles do not have to be made excessively thick due to a larger working width of the card and thus also a larger fixed cover length, it is advantageous if at least one intermediate rib piece is provided between the end pieces.
  • the use of intermediate rib pieces leads to a stiffening of the entire base body of the fixed lid.
  • the intermediate rib piece has an exhaust air opening analogous to the end pieces, so that an unhindered passage of the exhaust air through the intermediate rib piece is guaranteed even with one-sided suction.
  • the exhaust pipe is closed by the intermediate rib piece.
  • the exhaust pipe is designed in two parts along the length of the fixed cover, with a division being provided on the intermediate rib piece.
  • this version has the advantage that by dividing the exhaust pipe, suction can take place from both ends of the fixed lid. This means that a lower negative pressure is required for blockage-free suction than with one-sided suction. Accordingly, analogous to a suction on both sides without a closed intermediate rib piece, a cross-sectional narrowing of the exhaust air duct starting from a center of the fixed cover or a reduction in the slot width is advantageous.
  • a card with a suction system and at least one fixed lid according to the previous description is proposed, the exhaust pipe of the fixed lid being connected to the suction system.
  • Suction systems on cards are often designed on one side, which is why one of the two end pieces is provided with an exhaust air connection piece, which enables a connection to the card's suction system. The other end piece is closed accordingly.
  • outward-facing exhaust air connection pieces are provided on the end pieces on both sides of the fixed cover.
  • the arrangement of exhaust air connection pieces makes it possible to easily connect the exhaust air pipes to a suction system on the card, for example with hoses.
  • a connection on both sides is an advantage for fixed lids with a long fixed lid length.
  • the exhaust pipe is divided into two separate pipe sections by the intermediate rib piece, each of which is connected to an exhaust air system from different sides.
  • the fixed lid is arranged in the carding machine in such a way that a suction flow is generated by the suction system in the exhaust air pipe of the fixed lid, with an air flow in the suction channel caused by the suction flow in the exhaust air pipe having a flow direction opposite to the working direction.
  • Figure 1 shows a side view of a schematic representation of a card according to the prior art.
  • the fiber flakes 1 to be carded which can consist of natural fibers or chemical fibers or mixtures thereof, are filled into a filling shaft (not shown) in the form of roughly cleaned and dissolved fiber flakes.
  • the fiber flakes are removed from the filling shaft as cotton wool by a breezer.
  • the licker-in 2 can be formed from a single or several licker-in rollers 3.
  • the fiber flakes are broken up into individual fibers on the drum 4, parallelized and cleaned.
  • the stationary carding elements 15 and separation elements 16 are arranged in the pre-carding zone 10 and the post-carding zone 12.
  • the drum 4 is provided with a clothing on its surface and rotates about its axis of rotation 5 in a direction of rotation 6 from the licker-in 2 via the main carding zone 11 to the doffer 7.
  • the fibers on the drum 4 form a fiber fleece, which is removed from the customer 7 and then formed into a card sliver 9 in a manner known per se in a band forming unit 8 consisting of various rollers.
  • the separation elements 16 are used in particular to separate dirt, impurities and short fibers.
  • the separating elements 16 are each provided with a separating knife and are used in the pre-carding zone 10, the post-carding zone 12 and, if necessary, in the under-carding zone 13 as well as in the licker-in 2.
  • the separation elements 16 are held stationary in the card and are also referred to as fixed lids. With the help of the separation knives, dirt particles, impurities and short fibers are removed from the surface of the drum 4 as well as the surface of a pre-rice roller 16 are separated from the fiber fleece and transported away.
  • Figure 2 shows a schematic representation of a perspective view of a first embodiment of a fixed lid 17.
  • the profiles 19 and 20 extend over a fixed lid length 18.
  • the first profile 19 and the second profile 20 are held at a distance from one another at their ends on the end pieces 22 and 23 with fasteners 21.
  • the fasteners 21 are shown as examples of screw connections and the end pieces 22 and 23 are arranged outside the fixed cover length 18.
  • An exhaust pipe 25 arranged between the end pieces 22 and 23 and held thereon is only partially shown in order to make a knife element 41 arranged between the profiles 19 and 20 visible.
  • the exhaust pipe 25 and the knife element 41 also extend over the fixed cover length 18.
  • the exhaust pipe 25 is held at the end pieces 22 and 23, for example by screw connections, retaining pins or quick-release fasteners.
  • the exhaust pipe 25 is provided with a slot-shaped opening 37 directed towards the first profile 19, the opening 37 being guided over the entire length of the fixed cover 18.
  • the exhaust pipe 25 is closed against the second profile 20 and arranged at a distance from it.
  • the knife element 41 has a plurality of ejection openings 42 and is fastened to the profiles 19 and 20 with screws 43.
  • One side of the ejection openings 42 is designed as a knife blade or a separating knife, which results in a working direction 44 of the knife element 41 and thus of the fixed lid 17 directed against this knife blade.
  • the end piece 22 is provided with an exhaust opening 24, which corresponds to a diameter of the exhaust pipe 25.
  • Figure 3 shows a schematic sectional view at point XX of the fixed cover 17 Figure 2 .
  • the first profile 19 and the second profile 20 are held at a distance from one another on the end piece 23 with fasteners 21.
  • the knife element 41 is fastened to the first profile 19 and the second profile 20 with the screws 43 and has the working direction 44 in the illustration shown.
  • the working direction 44 is directed from the first profile 19 towards the second profile 20.
  • the exhaust pipe 25 is arranged, which, viewed in the working direction 44, has an extension which is kept smaller than a distance between the profiles 19 and 20 in order to enable the exhaust pipe 25 to be expanded in a direction pointing away from the knife element 41, without that one of the profiles 19 or 20 must be detached from the end pieces 22 and 23.
  • the exhaust pipe 25 is positioned and fastened in the end piece 23 with rods 39.
  • the exhaust pipe 25 is provided with an opening 37, which extends in a slot shape over the entire length of the fixed cover 18 and is directed against the first profile 19.
  • a connection between the knife element 41 and an interior 36 of the exhaust pipe 25 is created through the opening 37.
  • the opening 37 is provided with a seal 35 on a side of the exhaust pipe 25 facing the first profile 19 and on a side of the opening 37 facing away from the knife element 41.
  • a closed suction channel 45 is formed above the knife element 41 along it to the interior 36 of the exhaust air pipe 25.
  • the suction channel 45 is delimited by the knife element 41, a first surface 26 of the exhaust air pipe 25 facing the exhaust air pipe 25 and the first profile 19.
  • the spacing of the exhaust air pipe 25 from the second profile 20 creates a gap between the second profile 20 and a second surface 27 of the exhaust pipe 25 an inlet channel 48 is formed.
  • the inlet channel 48 is connected to the suction channel 45 on one side and to the environment on an opposite side. When the interior 36 of the exhaust air pipe 25 is acted upon, this results in an air flow from the environment to the exhaust air pipe 25 with an air supply through the inlet channel 48 with a flow direction 49 and an air flow above that Knife element 41 with a flow direction 46, which runs in the opposite direction to the working direction 44.
  • Figure 4 shows an enlarged schematic representation of a detail of the fixed lid 17 at point A after Figure 3 .
  • the knife element 41 fastened to the second profile 20 with the screws 43 has a working direction 44 due to the formation of the ejection openings 42.
  • the exhaust pipe 25 is held with the rod 39 in the end piece (not shown) and has the interior 36.
  • the suction channel 45 is formed between the first surface 26 of the exhaust air pipe 25 and the knife element 41.
  • the inlet channel 48 is formed between the second surface 27 and the second profile 20.
  • the inlet channel 48 and the suction channel 45 are connected to one another. In a transition from the inlet channel 48 into the suction channel 45, the second surface 27 is connected to the first surface 26 of the exhaust air pipe 25 via a deflection surface 28.
  • the deflection surface 28 is geometrically designed in such a way that an optimal deflection of the supplied air with the flow direction 49 into the suction channel 46 takes place.
  • the air flow with the flow direction 46 in the suction channel 45 achieves a transport 47 of the trash and short fibers passing through the ejection openings 42 into the suction channel 45.
  • Figure 5 shows a schematic representation of a guide element 33 and an air guide element 29.
  • the illustrated section of the exhaust pipe 25 with its interior 36 shows an embodiment of the transition from the inlet channel 48 into the suction channel 45 with the deflection surface 28.
  • the limitation of the suction channel 45 on the side of the exhaust pipe 25 is formed by a guide element 33 which is held on the first surface 26 of the exhaust pipe with a fastening 34.
  • the deflection surface 28 is formed by an air guide element 29 attached to the second surface 27 of the exhaust air pipe 25 with a fastening 30.
  • Figure 6 shows a schematic representation in cross section of a profile of the exhaust air pipe 25 with the inlet channel 48.
  • the cross section shows a simplified representation of an embodiment of the exhaust air pipe 25 in the form of an extruded profile.
  • the extruded profile has the fastening openings 38 through which the rods 39 (see Figure 7 ) to hold the exhaust pipe 25 in the base body of the fixed lid.
  • the interior 36 of the exhaust pipe 25 is provided with the opening 37, as a result of which the interior 34 is only slightly more than two-thirds enclosed by the extruded profile of the exhaust pipe 25.
  • the fastening openings 38 are distributed over the circumference of the exhaust pipe 25 in such a way that after the exhaust pipe has been installed in the base body, a high degree of dimensional stability of the extruded profile is achieved despite the opening 37. At the locations of the fastening openings 38, the extruded profile is expanded accordingly. In places of no particular importance, either a low material thickness is provided or the wall thicknesses of the extruded profile are limited by cavities 52.
  • the inlet channel 48 is delimited by the second profile 20 and the second surface 27 of the exhaust air pipe 25.
  • a throttle element 31 is provided on the second surface 27 of the exhaust air pipe 25 at an end of the inlet channel 48 seen in the flow direction 49.
  • the throttle element 31 is held on the exhaust air pipe 25 with a fastening 32 and causes a narrowing of the cross section of the inlet channel 48 in front of the deflection surface 28, which merges into the first surface 26 of the exhaust air pipe.
  • the representation of the arrangement and design of the throttle element 31 is an example; it is also possible to provide an arrangement of the throttle element 31 on the second profile 20.
  • Figure 7 shows a schematic representation of a perspective view of a further embodiment of a fixed lid 17.
  • an intermediate rib piece 50 is installed in order to stiffen the base body of the fixed lid 17 consisting of the first profile 19, the second profile 20 and the end pieces 22 and 23, an intermediate rib piece 50 is installed.
  • the intermediate rib piece 50 is provided, for example, in the middle of the fixed cover length 18.
  • the exhaust pipe 25 is shown in one half of the fixed cover 17; in the other half, the exhaust pipe 25 is not shown to be able to show the knife element 41.
  • the knife element 41 is attached to the first profile 19 and to the second profile 20 with the screws 43.
  • the first profile 19 and the second profile 20 are each screwed to fasteners 21 on the end pieces 22 and 23.
  • a screw connection 51 of the first profile 19 and the second profile 20 with the intermediate rib piece 50 is provided.
  • the exhaust air pipe 25 is designed in two parts, with the exhaust air pipe 25 being divided at the intermediate rib piece 50.
  • an exhaust air opening 24 is provided in the intermediate rib piece 50, analogous to the exhaust air opening 24 in the end piece 22.
  • the exhaust pipe 25, or rather the two parts of the exhaust pipe 25, are held in the end pieces 22 and 23 with three rods 39.
  • the rods 39 are moved along a rod axis 40 from one end piece 22 to the other end piece 23 through corresponding fastening openings 38 (see Figure 3 ) guided.
  • Corresponding holding openings are provided in the end pieces 22 and 23 as well as in the intermediate rib piece 50. Fastening the exhaust air pipe 25 in the base body of the fixed lid 17 is thereby possible in a simple manner from an end face of the fixed lid 17.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP23180834.6A 2022-08-10 2023-06-22 Chapeau fixe pour une carde Pending EP4328363A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH000944/2022A CH719953A1 (de) 2022-08-10 2022-08-10 Festdeckel für eine Karde.

Publications (1)

Publication Number Publication Date
EP4328363A1 true EP4328363A1 (fr) 2024-02-28

Family

ID=86942671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23180834.6A Pending EP4328363A1 (fr) 2022-08-10 2023-06-22 Chapeau fixe pour une carde

Country Status (3)

Country Link
EP (1) EP4328363A1 (fr)
CN (1) CN117587554A (fr)
CH (1) CH719953A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3336323A1 (de) * 1983-10-06 1985-05-02 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zum ausscheiden von verunreinigungen, wie trash, schalenteile u. dgl. fuer eine karde oder krempel
CH681546A5 (en) * 1989-12-04 1993-04-15 Rieter Ag Maschf Cotton carding machine for improved action - has stationary flat segments with adjustments for working position, surrounding swift at specific locations
WO2010003265A1 (fr) 2008-07-11 2010-01-14 Maschinenfabrik Rieter Ag Elément de travail sur une machine de traitement de fibres
ITBS20120013A1 (it) * 2012-01-31 2013-08-01 Marzoli Spa Bocchetta di aspirazione di una macchina cardatrice
CH715974A1 (de) 2019-03-19 2020-09-30 Rieter Ag Maschf Messerelement für eine faserverarbeitende Maschine.
CH715975A2 (de) 2019-03-19 2020-09-30 Rieter Ag Maschf Karde mit Ausscheideelementen.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1092748A (fr) * 1954-02-04 1955-04-26 Perfectionnements au débourrage continu des garnitures de cardes
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