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
  • D01G15/28—Supporting arrangements for carding elements; Arrangements for adjusting relative positions of carding elements

Definitions

• the present invention relates to a card with a drum and a revolving flat with flat bars rotating around a portion of the circumference of the drum, at least one flat bar being designed to transmit current operating data or an electrical contact to a controller of the card, the at least one flat bar being designed is to correspond with at least one contact element, wherein the contact element is designed to conduct the electrical contacts or data to the control of the card, wherein the at least one contact element is arranged in the area of a flexible arch.
• the invention also relates to a contact element.
• the fiber material e.g. B. cotton and / or man-made fibers are usually compared to a rotating roller equipped with a set of stationary or rotating cleaning or carding elements.
• these elements In order to achieve a good cleaning or carding effect, these elements must be arranged as close as possible to the clothing of the rotating roller.
• the setting takes place in the cold state and with the roller at a standstill.
• the effective distance between the tips of a clothing and a carding element opposite the clothing is called the carding gap.
• the carding gap is decisive for the carding quality.
• the size (width) of the carding gap is an essential machine parameter, which influences both the fiber processing technology and the machine's running behavior.
• the carding gap is set as narrow as possible without running the risk of a "collision" between the working elements. In order to ensure uniform processing of the fibers, the gap must be as equal as possible across the entire working width of the machine.
• the carding gap is influenced in particular by the machine settings on the one hand and the condition of the clothing on the other.
• the most important carding gap of the revolving flat card is located in the main carding zone, ie between the drum and the revolving flat unit. At least one set that is adjacent to the working distance is in motion, usually both. To increase the production of the card, one tries the operating speed or the
• EP 3354774 A1 describes a carding gap adjustment in which the flexible arch can be adjusted in segments. This document also discloses the setting of the carding gap on a flat rod. Both methods can be used while the card is in operation.
• the flat rod is designed to transmit data to a controller, with a contact element which interacts with the pins of the flat rod being arranged in a stationary manner in the flexible bend.
• the disadvantage is that the setting of the carding gap is only possible in a small adjustment range. An adjustment of the carding gap in the range of several millimeters is not possible with this arrangement of the contact element in the flexible bend, since the contact between the flat rod and the contact element would be interrupted due to the large adjustment path. Retrofitting existing cards with this system is also too complex.
• the object of the invention is to develop a card in which the carding gap can be set in an enlarged range and in which data or electrical contacts can be reliably transmitted from a flat rod to a controller. It is also an object of the invention to create a contact element that can be mounted on existing cards.
• the invention according to claim 1 relates to a card with a drum and a revolving flat with flat bars revolving around a portion of the circumference of the drum, at least one flat bar being designed to transmit current operating data or an electrical contact to a controller of the card, with the at least one Flat rod is designed on at least one end face to correspond with at least one contact element, the contact element being designed to conduct the electrical contacts or data to the controller of the card, the at least one contact element being arranged in the region of a flexible arch.
• the invention includes the technical teaching that the at least one contact element has at least one contact arc which is designed to compensate for a change in distance between the flat bar and the drum.
• the contact element can be arranged and fastened in a stationary manner on the flexible bend.
• the contact sheet is designed to compensate for a change in the distance between the flat bar and the drum, changes in the carding gap in the range of several millimeters can be determined, which was not possible according to the prior art.
• the contact element can be retrofitted to cards with sufficient accuracy in order, for example, to transmit data from a flat rod to the controller.
• the flat rod can be equipped with an electronic component and can be exchanged for a conventional flat rod, for example for a first calibration of the flexible bend.
• the change in the carding gap on the order of several millimeters can also be used to reduce the To automatically calibrate the carding gap with sufficient security and to approach slowly with the first zero point adjustment.
• the at least one contact sheet is preferably arranged resiliently or elastically on the contact element.
• the resilient or elastic arrangement can take place by means of spring elements or elastic rubber or plastic elements, for example made of foam rubber.
• One or more contact arcs are preferably arranged on or in a sliding strip.
• the contact sheet is made in one piece, or it has a rail and at least one spring element.
• the contact sheet can consist of an elastic base material that is coated or connected by means of an electrically conductive layer.
• the contact arc has at least one spring element and at least one rail.
• the rail interacts with a sliding element, a pin or an electrically conductive connection of the flat rod, the sliding element, the pin or the electrically conductive connection sliding over or on the rail with contact.
• the spring element is designed to press the rail with bias against the sliding elements or pins, so that a Contact for the transmission of data or an electrical contact is always guaranteed.
• the at least one spring element is advantageously arranged with a first end on the contact element, and the contact arc is arranged at the second end.
• the contact element accommodates the spring element or elements between a carrier and a clamping element, which can be produced from an electrically insulating material.
• the fact that several contact elements are fixedly arranged on the flexible bend results in a simple and inexpensive setting made of plastic that is easier to manufacture than a one-piece contact element that extends over an angle of approximately 90 ° to 120 °.
• the contact element preferably has means for protecting the rail and the spring elements, which can be designed, for example, as a circumferential arc.
• the rail and the spring elements could be damaged during cleaning and maintenance work.
• the arch can also be designed to limit the spring travel or to protect the spring elements from overload.
• the sliding elements or pins can slide on the arch according to a predetermined adjustment range, so that further suppression or tensioning of the spring elements is avoided.
• At least one flat rod preferably has an electronic component for acquiring the operating data and forwarding them to the control of the card.
• the electronic component is suitable for transmitting the operating data wirelessly or in a contact-based manner to the controller of the card.
• the electronic component is preferably arranged in a flea space of the flat rod, so that the flat rod can be mass-produced and can be exchanged for conventional flat rods with little effort.
• the contact element according to the invention for use on a card has at least one contact arc which is designed to interact with the sliding elements or pins of the flat rod and to compensate for a change in distance between the flat rods and the drum.
• the contact element can be attached in segments to the flexible bend of the card, so that several contact elements cover an angular area concentrically on the drum and transmit data from an electronic component of a flat rod or electrical contacts between the clothing of the flat rod and the clothing of the drum to the card control.
• FIG. 1 a schematic side view of a card with the device according to the invention
• Figure 2 is a perspective view of a
• FIG. 3a shows a first representation of the contact segments
• FIG. 3b shows an exploded view of the contact segments
• FIG. 4 shows an enlarged detailed illustration with the pins of a flat rod
• Figure 5a shows another embodiment of a
• Figure 5b shows another embodiment of a
• FIG. 6a shows a further exemplary embodiment of the invention with a contact element integrated in the sliding strip
• FIG. 6b shows a further exemplary embodiment of the invention with a contact element integrated in the sliding strip
• Fig. 1 shows a card 100 according to the prior art, in which fiber flocks are passed via a shaft to a feed roller 1, a feed table 2, via several lickerins 3a, 3b, 3c, to the drum 4 or the tambour. On the drum 4, the fibers of the fiber flocks are parallelized and cleaned by means of fixed carding elements 13 and rotating flat rods 20 arranged on a revolving flat 17.
• the resulting fiber web is then conveyed via a pick-up 5, a stripping roller 6 and several nip rollers 7, 8 to a fleece guide element 9, which transforms the fiber web with a funnel 10 into a fiber band, which is sent via take-off rollers 11, 12 to a subsequent processing machine or a Can 15 is passed.
• the adjustment of the flat bars 20 to the drum 4 (carding gap) takes place via a flexible bend (not shown here) or sliding strips 18, which can have elements aligned with one another in a wedge shape.
• the contact element 22 is part of an overall concept with which the concentricity of the flexible bend 27 or the sliding strip 18 to the drum 4 and / or the distance between the flat bars 20 to the drum 4 (carding gap) can be automatically adjusted.
• the flexible bend 27 can have a sliding strip 18 of constant cross-section, on which the flat rod 20 slides along its flat travel.
• the slide strip 18 can also consist of two wedge-shaped slide strips 18a, 18b which are arranged against one another, the upper slide strip 18a being arranged displaceably on the lower slide strip 18b, so that the outer radius of the slide strip 18 changes with a shift.
• the slide strip 18 is arranged and fastened on the flexible bend 27.
• the flexible bend 27 can have an upwardly open groove into which the lower slide strip 18b can be integrated.
• the lower slide strip 18b can be designed in one piece with the flexible bend 27 be.
• the sliding strip can also be arranged directly or indirectly adjustable on the side plate, for example as a flexible curve with a coated surface.
• it is an adjustable guide track for the revolving cover, which is guided on a partial circumference of the drum 4 concentrically to the drum 4 with a defined carding gap.
• the overall concept of the automatic carding gap control includes an electrically conductive clothing with an associated flat rod 20, which are arranged in an electrically insulated manner within the card 100.
• the set 20 is arranged in an electrically conductive foundation, as is described in DE 102017101863.
• the flat bars 20 are electrically insulated on the sliding strip 18, the electrical contact for the contact and temperature control T-CON, which is described in DE 102006002812, via the set in the foundation via the outer sliding elements in the contact and temperature control T-CON is directed and transmitted.
• FIG. 2 shows the principle of the slide strip 18, which can consist of an upper displaceable wedge-shaped slide strip 18a and a lower stationary wedge-shaped slide strip 18b.
• the lower slide strip 18b can be integrated in a groove of the flexible bend 27 that is open at the top and therefore cannot be seen separately in this illustration.
• a one-piece slide strip 18 can also be arranged on or partially in the flexible bend 27.
• the lower stationary wedge-shaped sliding strip 18b is fixed or arranged on or in the flexible bend 27 and, if necessary, is formed in one piece with it.
• the slide strip 18 for the revolving cover system 17 is shown.
• the flexible bend 27 is usually connected to the side plate of the card 100, which is not shown here, in a directly or indirectly adjustable manner, so that each card 100 has at least one one-part or multi-part flexible bend 27 on both sides of the drum 4.
• the radius of the flexible bend 27 and the sliding strip 18 arranged thereon should be set concentrically to the radius of the drum 4, since the flat bars 20 are guided on their flat circle against the direction of rotation of the drum 4 and should always have a constant distance from the drum 4 (carding gap).
• the flat bars 20 slide with their slide elements or pins 20a, which are guided and moved at a distance from one another via a belt (not shown here).
• the sliding elements or pins 20a can interact with the contact arch 23 of a contact element 22, which can for example be arranged laterally on the sliding strip 18 or on the flexible arch 27.
• a contact element 22 can for example be arranged laterally on the sliding strip 18 or on the flexible arch 27.
• an electrically conductive connection between the flat rod 20 and the contact element 22 can also be possible.
• the electrical contact during calibration takes place via the tips of the fittings of the flat rod 20, via an electrically conductive foundation of the flat rod 20 to the sliding elements or pins 20a, which are electrically connected to the foundation, to the contact sheet 23.
• This embodiment shows the fixed arrangement of, for example, four contact elements 22 on the flexible bend 27, so that the location of the contact between the clothing of a flat rod 20 and the clothing of the drum 4 can be localized very precisely.
• the contact elements 22 with their contact arcs 23 are in turn electrically connected to the control of the card 100.
• the flexible bend 27 has a plurality of adjusting spindles 19 which can be adjusted manually or by motor.
• there are six adjusting spindles 19 and two adjustment points at the ends of the Flexible sheet is provided, with which the flexible sheet 27 is adjustable on each side of the card 100.
• the adjustment of the upper slide bar 18a on the lower slide bar 18b takes place, as already mentioned, with a toothed wheel, not shown here, which is driven by means of drive 21.
• the drive 21 can be designed as a motor-gear combination, for example as a stepper motor with an externally arranged sensor system or as a servomotor with an integrated sensor system.
• the wedge shape By adjusting or shifting the upper slide bar 18a on the lower slide bar 18b, the wedge shape simultaneously translates the movement, in which a large path is covered on the circumference of the lower slide bar 18b, which causes only a slight change in the radius. Since the contact elements 22 are fixedly attached to the flexible bend 27, the maximum change in the radius of the slide bar 18 also causes a change in the distance between the slide elements or pins 20a of the flat bar 20 to the flexible bend 27 and to the drum 4
• the contact sheet 23 is resiliently or elastically arranged on the contact element 22.
• the contact element 22 is shown enlarged.
• the contact element 22 can comprise a carrier 22a and a clamping element 22c, between which the contact sheet 23 is clamped.
• the carrier 22a and the clamping element 22c can be connected to one another in a form-fitting and / or force-fitting manner.
• An arch 22b which is arranged on the carrier 22a, can limit the spring travel of the contact arch 23 and at the same time protect the rail 23a and the spring elements 23b from damage during cleaning and maintenance work.
• the contact arc 23 comprises a rail 23a that is slightly convex and is essentially concentric to the radius of the Drum 4 extends.
• the rail 23a can for example be made of a flat or round material, with a flat or curved top side cooperating with the pins 20a of the cover 20.
• the pins 20a slide on the one hand on the slide strips 18, but protrude slightly above the slide strip 18, so that the contact arc
• the rail 23a of the contact sheet 23 is arranged on the contact element 22 by means of spring elements 23b.
• the spring elements 23b consist of S-shaped bent flat material, which is arranged on the underside or on the side of the rail 23a and can be fastened.
• the spring elements 23b can, however, also consist of spiral springs, torsion springs or alternative spring elements, provided that they can compensate for the adjustment of the carding gap.
• the spring elements 23b also provide the electrical connection between the rail 23a and a connection
• the spring elements 23b can also be designed to be electrically non-conductive or insulated so that the contact between the rail 23a and a connection 24 or another connection for controlling the card 100 can be transmitted by means of a separate line.
• alternative elastic materials rubber, elastic plastics, etc.
• connection 24 is arranged on the carrier 22a and corresponds with a first end directly or indirectly to the rail 23a or to one of the spring elements 23b.
• the second The end of the connection 24 can be designed such that an electrical line connection can be plugged in.
• each contact element 22 is arranged on the flexible bend, which can transmit an electrical signal segment by segment when contact is made between the sets of flat bars 20 and the set of drum 4 to the controller.
• the limitation of the arc length of each contact element 22 to an angular range of, for example, 10 ° to 30 ° enables the carriers 22a and clamping elements 22c to be manufactured inexpensively.
• At least one further sensor must also be used, which, among other things, determines the angular position of the drum 4 and the associated flat rod 20.
• a segmentation of the contact sheet 23 enables a sufficiently precise location of a contact between the clothing of the flat rod 20 and the clothing of the drum 4 in a simple manner. The segmentation can be done so that the maximum arc length of the contact sheet 23 corresponds to the distance between two pins 20a of a flat rod 20 or the width of the sliding element.
• the distance between two contact arcs 23 must be greater than the distance between two pins 20a or the width of a sliding element so that the distance between the contact arcs 23 is not bridged by a flat bar 20. If only one pin 20a or only a limited part of a sliding element is to be electrically conductive, the distance between the contact arcs 23 can be reduced accordingly.
• the number of spring elements 23b naturally varies with the arc length of the rail 23a and the structural design of the rail 23a and its attachment to the contact element 22.
• FIG. 4 shows once again the interaction of a flat rod 20 with the contact element 22, the sliding elements or pins 20a sliding along the rail 23a and the spring elements 23b pressing the rail 23a against the pins 20a.
• the carrier 22a is fastened to the flexible arch 27 with the clamping element 22c. Both can consist of a plastic, which receive the contact sheet 23 in an electrically insulated manner.
• the contact sheet 23 is arranged between the carrier 22a and the clamping element 22c, the lower region of the spring elements 23b being arranged in a clamping manner between the carrier 22a and the clamping element 22c.
• the arc 22b limits the spring travel of the rail 23a and at the same time protects the contact arc 23 from damage.
• a spring element 23b rests on an angled leg of the connection 24.
• An electrical line can be connected to the free leg of the connector 24 so that a signal or an electrical contact can be transmitted from the sliding element or pin 20a of the flat rod 20 via the contact element 22 to the control of the card 100.
• the contact element 22 comprises at least one contact sheet 23.
• the contact sheet 23 is designed in two parts and includes a rail 23a which is arranged on the contact element 22 by means of spring elements 23b.
• the contact sheet 23 itself can also be designed to be elastic or resilient and be arranged directly or indirectly on the contact element 22.
• the contact element 22 can furthermore comprise a carrier 22a and a clamping element 22c, between which the contact sheet 23 can be clamped.
• the contact sheet 23 can but can also be arranged on the contact element 22 in some other way.
• the carrier 22a and the clamping element 22c can be connected to one another in a form-fitting and / or force-fitting manner.
• an arch 22b which is arranged on the carrier 22a, can limit the spring travel of the contact arch 23 and at the same time protect the rail 23a and the spring elements 23b from damage during cleaning and maintenance work.
• the spring element 23b is designed as an elastic and heat-resistant plastic or rubber, for example made of foam rubber, that is arranged as a one-piece or multi-part spring element 23b between the carrier 22a and the rail 23a.
• the spring element 23b can be glued onto the carrier 22a and / or fastened to the carrier 22a in a clamping manner with the clamping element 22c.
• the rail 23a can be connected to the spring element 23b, in this case to the elastic plastic or rubber, by means of an adhesive connection. Since the spring element 23b is only subjected to pressure, an adhesive connection is sufficient for this application.
• the contact arc 23 or its rail 23a is slightly convex and extends essentially concentrically to the radius of the drum 4.
• the rail 23a can for example be made of a flat or round material, with a flat or curved top side with the pins 20a Lid 20 cooperates.
• the pins 20a slide on the one hand on the slide strips 18, but protrude slightly above the slide strip 18, so that the contact sheet 23 with the rail 23a presses against the pins 20a from below, thus creating a mechanical and electrical connection.
• the rail 23a of the contact sheet 23 is arranged on the contact element 22 by means of at least one spring element 23b, which is designed as an elastic and heat-resistant plastic or rubber.
• the contact sheet can also be designed to be elastic or resilient, for example as an electrically conductive layer on the be applied elastic plastic or rubber and thus be formed in one piece.
• the contact sheet can also be designed as an electrically conductive cable with an elastic cross section.
• the electrical connection between the rail 23a and the control takes place via a connection 24, since the spring element 23b is designed to be electrically insulating.
• the electrical contact between the contact sheet 23 or the rail 23a and the connection 24 or another connection for controlling the card 100 can be transmitted by means of a separate line.
• connection 24 is arranged on the carrier 22a and corresponds with a first end directly or indirectly to the contact arc 23 or to the rail 23a.
• the second end of the connection 24 can be designed so that an electrical line connection can be plugged in.
• the contact element 22 is integrated into the slide strip 18 or the upper slide strip 18a.
• segments or sections of grooves are incorporated in the slide strip 18, 18a, in which the contact sheet 23 is inserted.
• the contact sheet 23 again has a spring element 23b, not shown, on which a rail 23a is mounted.
• the contact sheet 23 or the rail 23a protrude unloaded by the pins 20a of the flat bars 20 from the surface of the slide strip 18, 18a. When loaded by the pins 20a of the flat bars 20, the contact sheet 23 forms a flat surface with the surface of the sliding strip 18, 18a.
• the contact sheet 23 can be constructed in several parts from at least one spring element 23b and the rail 23a and fastened to one another, for example by means of gluing.
• the contact sheet 23 can, however, also be designed in one piece, for example as a spring element 23b made of plastic or rubber with an electrically conductive layer or as an elastic conductive cable.
• the at least one spring element 23b can be made of metallic springs or elastic and heat-resistant plastic or rubber.
• the arrangement of the spring elements 23b can take place in the middle in the sliding strip 18, 18a, or towards the side edge (dashed illustration in FIG. 6a).
• a connection 24 (not shown) can electrically connect the contact sheet 23 or the rails 23a to the controller.
• the sliding strip 18, 18a has a shoulder 25 on the lateral edge, which receives the contact element 22, which is designed here in two parts as a contact arch 23 with a spring element 23b and a rail 23a.
• the spring element 23b is designed as an elastic and heat-resistant plastic or rubber, which is fastened in the shoulder 25 to the rail 23a, for example by means of an adhesive connection.
• the arrangement or integration of the contact element on the slide strip 18, 18a has the advantage that the functional surface of the slide strip 18, 18a on which the pins of the flat bar slide remains free. With a central arrangement, depending on the operating conditions, the cleaning of the

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Preliminary Treatment Of Fibers (AREA)

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Citations (6)

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• 2019
  • 2019-04-25 DE DE102019110691.5A patent/DE102019110691A1/de active Pending
• 2020
  • 2020-02-28 WO PCT/EP2020/055280 patent/WO2020216497A1/de unknown
  • 2020-02-28 EP EP20708074.8A patent/EP3959363B1/de active Active
  • 2020-02-28 CN CN202080016338.XA patent/CN113474499B/zh active Active

Patent Citations (6)

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