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WO2024233324A1 - Charrue assistée par le vide et procédé - Google Patents

Charrue assistée par le vide et procédé Download PDF

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Publication number
WO2024233324A1
WO2024233324A1 PCT/US2024/027670 US2024027670W WO2024233324A1 WO 2024233324 A1 WO2024233324 A1 WO 2024233324A1 US 2024027670 W US2024027670 W US 2024027670W WO 2024233324 A1 WO2024233324 A1 WO 2024233324A1
Authority
WO
WIPO (PCT)
Prior art keywords
plow
web
inverted
slot
along
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
PCT/US2024/027670
Other languages
English (en)
Inventor
Samuel A. SCHNEIDER
Lloyd F. Kreif
Zachary J. Giffey
Michael T. STAROSTA
Christopher J. BOGE
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.)
Joa Curt G Inc
Original Assignee
Joa Curt G Inc
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 Joa Curt G Inc filed Critical Joa Curt G Inc
Publication of WO2024233324A1 publication Critical patent/WO2024233324A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15747—Folding; Pleating; Coiling; Stacking; Packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41H—APPLIANCES OR METHODS FOR MAKING CLOTHES, e.g. FOR DRESS-MAKING OR FOR TAILORING, NOT OTHERWISE PROVIDED FOR
    • A41H43/00—Other methods, machines or appliances
    • A41H43/02—Handling garment parts or blanks, e.g. feeding, piling, separating or reversing
    • A41H43/025—Folding, unfolding or turning over

Definitions

  • Embodiments of the present disclosure relate to a web converting machines, and in particular, automatic high-speed machines that convert one or more webs of material into or disposable hygiene products such as diapers or feminine hygiene products or disposable apparel such as medical or surgical gowns.
  • Known web converting machines typically include one or more folding units to fold portions of the web over other portions of the web. The portion of the web to be folded passively travels over an exposed surface of the folding unit during the folding process.
  • These folding units may use a stream of compressed air directed against the web at various locations along the folding unit to assist in controlling the folded web portion as the web travels downstream along the folding unit.
  • streams of compressed air are difficult to control and direct, add complexity to the machine, and further increase the manufacturing costs of such machines.
  • FIG. 1 shows a web folding apparatus adjacent a conveyor, according to one embodiment.
  • FIG. 2 shows the main plow of the web folding apparatus of FIG. 1, according to one embodiment.
  • FIG. 3 shows the main plow and the inverted plow of the web folding apparatus of FIG. 1 , each with their respective upstream section and downstream sections, separated from one another in a non-operative position, according to one embodiment.
  • FIG. 4 is a top view of the web folding apparatus of FIG. 1, according to one embodiment.
  • FIG. 4A is a cross-sectional view of FIG. 4 depicting the slot formed between the main plow and the inverted plow in an operating position, according to one embodiment.
  • FIG. 5 is a view of a portion of the vacuum manifold and corresponding vacuum nozzles positioned adjacent a portion of the main plow, according to one embodiment.
  • FIGS. 6 and 7 show support arms of mounting structures configured to support the main plow and the inverted plow, according to embodiments.
  • FIG. 8 is a perspective view of the web folding apparatus in an operating position, according to one embodiment.
  • FIG. 9 is a perspective view of the web folding apparatus in a non-operative position, according to one embodiment.
  • FIGS. 10A-10H are a sequence of views showing operation of the web folding apparatus, according to one embodiment, with select portions of the upstream and downstream sections of the main and inverted plows omitted throughout the views for clarity of the operation.
  • FIG. 11 shows a web folding apparatus having a first folding station and a second folding station in block diagram format, according to another embodiment.
  • a web folding apparatus 800 (see FIG. 1) includes a main plow 120 and an inverted plow' 124.
  • Each plow 120, 124 is constructed as two connected sections, with a first or upstream section 130, 152 of the plow 120, 124 located at an upstream end 136 of the web folding apparatus 800, and second or downstream section 140, 154 of the plow' 120, 124 located at a downstream end 146 of the web folding apparatus 800.
  • the main plow 120 includes the upstream section 130 and the downstream section 140
  • the inverted plow 124 similarly includes an upstream section 152 and the downstream section 154.
  • FIG. 2 shows the main plow' 120 only.
  • FIG. 3 shows both the upstream section 130 and downstream section 140 of the main plow 120, as well as both the upstream section 152 and the downstream section 154 of the inverted plow 124. with the inverted plow 124 shown separated or moved away from the main plow 120 in a cross-machine direction 202 in a non-operating or sendee position.
  • a conveyor 302 runs directly under the plows 120, 124.
  • the conveyor 302 extends laterally across the width of the main plow 120 and inverted plow 124, and extends in a machine direction 310 from well upstream from the upstream end 136 of the web folding apparatus 800 to w'ell downstream of the downstream end 146 of the web folding apparatus 800.
  • a dead plate 303 is coupled to the downstream end 146 of the main plow 120.
  • the dead plate 303 is positioned above and spaced away from the conveyor 302 by a gap. Dead plate 303 is omitted from the remainder of the figures for purposes of clarity.
  • each plow section 130, 140, 152, 154 is formed of a plurality of layers or stacked segments 210 having a generally flat rectangular shape on three sides, and having a face portion or contour 216 formed on the remaining three sides, if visualized as a solid rectangular block, which it is not in the illustrated embodiment.
  • 124 form a continuous three-dimensional contoured surface 216, with a first half 222 of the contoured surface 216 formed on the upstream section 130, 152 of the web folding apparatus 800, and a second half of the contoured surface 228 formed on the downstream sections 140, 154 of the w eb folding apparatus 800.
  • the stacked segments 210 may be bolted or welded in place to maintain the overall shape of the plows 120, 124. and are preferably made of metal, such as aluminum, to facilitate economical milling, grinding, and/or polishing of the metal segments to achieve the desired contour, however, may be made of other suitable materials such as plastic in alternate embodiments.
  • the contour 216 When viewed as a three-dimensional surface, the contour 216 displays a helically curved face that twists through a predetermined arc of rotation.
  • the face may be a continuous, smooth surface, as shown, or constructed of multiple facets in alternate embodiments.
  • the arc of rotation may range between ninety degrees and 180 degrees.
  • the figures generally show rotation through an arc of about 180 degrees, but other values of rotation may be used depending on the application.
  • each respective plow 120, 124 is formed from the plurality of stacked segments 210, with each individual segment having a face portion configured to “build” a vertical portion or “slice” of the helically curved face portion.
  • each of the stacked segments 210 are planar and parallel to each other in the stacking direction.
  • each respective plow 120, 124 is formed as a single continuous structure by an additive machining operation such as three-dimensional printing or a subtractive machining operation that defines the plow profile by selective removal of material from a solid piece of material.
  • each respective plow 120, 124 includes the upstream sections 130, 152 and the downstream sections 140, 154, with each section providing one-half of the helically curved face portion 222, 228 in the machine direction 310.
  • a radius of curvature 250 (best shown in FIG.
  • web folding apparatus 800 may include a vacuum manifold 710 that extends along a predetermined length of the plows 120, 124.
  • the vacuum manifold 710 is configured to follow a helical edge of the plows 120, 124, and thus also follows a helical twisting path 720, as shown in particular in FIG. 7.
  • the vacuum manifold 710 is formed as a plurality of tube-like segments 730, where each tube-like segment 730 has as a vacuum nozzle 740.
  • Each tube-like segment 730 and vacuum nozzle 740 may be in fluid communication with the vacuum source (not shown) via a vacuum port 750, where the vacuum ports 750 may be operatively coupled to a common source of vacuum or may be operatively coupled separately to individual vacuum sources, thus providing web folding apparatus 800 with multiple, independently controlled vacuum zones.
  • the vacuum manifold 710 runs along and is coupled to a predetermined length of the main plow 120. In alternate embodiments, the vacuum manifold 710 may run along and be coupled to a length of the inverted plow 124 or may be mounted independent of either plow 120, 124.
  • the main plow 120 is separated from the inverted plow 124 by a fixed distance 223 in the cross-machine direction 202 so that the face portions 222, 228 of the respective plows 120, 124 are correspondingly separated to form an outwardly extending elongated slot or channel 236 (best shown in FIG. 4A) with parallel sidewalls 242, 244 defined by the respective helically shaped face portions 222, 228, where the slot or channel 236 has an open base portion 510 (best seen in FIG. 4A) proximal the conveyor 302 (FIG. 1).
  • the distance 223 may be, for example, between 10 mm to 25 mm. However, any suitable spacing distance may be used depending on the application, taking into account the thickness, dimensions, and flexibility of the web material 402. Thus, in this case, the width of the slot or channel 236 is preferably fixed by this predetermined distance.
  • the vacuum nozzles 740 are disposed generally above the slot 236 and equidistant between the side walls 242, 244 that define the slot 236.
  • the vacuum manifold 710 essentially creates an airflow that travels upward from the base 510 of the slot 236, along the sidewalls 242, 244 of the slot 236 and into the vacuum manifold 710.
  • Each vacuum nozzle 740 creates an upward flow of air from the base portion 510 of the slot 236, along the sidewalls 242, 244 of the slot 236, and into the vacuum nozzle which a portion of a web to be folded (e.g., the first extension portion 412 of FIGS. 10A-10H) moves as the web body (e.g., web 406 of FIGS. 10A-10H) is transported in the downstream machine direction 310. Accordingly, the web portion to be folded moves along the contour defined by the face portions 222, 228 and twists and turns in accordance with the helical shape of the face portions 222, 228.
  • the web portion to be folded enters the slot 236 at the upstream end 136 of the folding station 820 and is retained, against the force of gravity, between the sidewalls 242, 244 of the slot 236, by the upward flow of air generated by the vacuum manifold 710. This prevents the w eb portion to be folded from drooping, collapsing, wrinkling, or otherwise losing its helically planar shape as the web body moves in the downstream direction.
  • the force of the vacuum is controlled via a controller (not shown) to provide the desired amount of airflow at various points along the length of the plows such that during the final folding stage when the web portion to be folded folds completely over the main web body, the air flow is such that complete folding can occur unimpeded.
  • Vacuum force can be preset and static throughout operation or actively controlled during machine operation via a feedback loop and stepper motor (not shown).
  • the main plow 120 is moveable in the z-direction 309 to facilitate web thread-up while the inverted plow 124 is moveable in the crossmachine direction 202 to permit adjusting distance 223 and to facilitate service.
  • the main plow 120 is moveable in the cross-machine direction 202 and the inverted plow 124 moveable in the z-direction 309 or either or both plows 120, 124 may be fixed.
  • a support structure 610 may include one or more cantilevered support arms 620 operatively coupled to the moveable plow(s). which in the case of the illustrated embodiment is inverted plow 124, as shown in FIG. 6.
  • the illustrated embodiment shows three cantilevered support arms 620 secured to the inverted plow 124 at opposite ends and at a middle portion thereof, respectively, however, more or less support arms may be included based on design specifications.
  • One or more actuators 630 may provide the force to move the inverted plow 124 in the cross-machine direction 202.
  • a support structure 611 may include one or more support arms 621 operatively coupled to the main plow' 120 as shown in FIG. 7.
  • One or more actuators 631 may provide the force to move the main plow 120 in the z-direction 309.
  • FIG. 8 shows the inverted plow 124 positioned adjacent main plow 120 in an operating position while
  • FIG. 9 shows the inverted plow 124 moved fully away from the main plow 120 in anon-operative position for maintenance and/or cleaning.
  • Support structures 610 and 611 are omitted in FIGS. 8 and 9 for clarity purposes.
  • FIGS. 10A-10H are a sequence of views showing operation of the web folding apparatus 800 of FIG. 1. Note again that for purposes of clarity only, FIGS. 10A-10E show only the upstream section 130 and the downstream section 140 of the main plow 120 while omitting the inverted plow 124. FIGS. 10A-10H show a web of material 402 supported by the conveyor 302 (see FIG. 1) and moving downstream on the conveyor 302 in the machine direction 310.
  • the web of material 402 includes a body portion 406, which in some applications, may represent a shoulder web or shoulder portion of a medical gown or a main chassis of a diaper or feminine napkin, and may also include an extension portion (first extension portion) 412, which in some applications, may represent a torso web or torso portion of a medical gown or an ear or wing portion of a diaper or feminine napkin, to be folded over the body portion 406 during transit from the upstream end 136 of the web folding apparatus 800 to the downstream end 146 of the web folding apparatus 800.
  • Body portion 406 may be a continuous w eb or discrete web sections traveling along conveyor 302 in alternative embodiments.
  • the web of material 402 moves downstream on the conveyor 302 and has entered the upstream end 136 of the w eb folding apparatus 800. Initially, at a first operational position 414, the first extension portion 412 of the web of material 402 initially contacts an initial surface 416 of the upstream section 130 of the main plow 120.
  • the first extension portion 412 begins to ride upward and bend or fold toward the body portion 406 as it follows the surface contour of the upstream section 130 of the main plow 120.
  • FIG. 10C shows further downstream movement of the body portion 406 and the first extension portion 412 to a third operational position 424, where a downstream or leading edge 430 of the first extension portion 412 is significantly bent or folded away from a horizontal plane and tow ard the body portion 406, yet is still at an obtuse angle relative to the body portion 406.
  • FIG. 10D shows even further downstream movement of the body portion 406 and first extension portion 412 to a fourth operational position 436, where the downstream or leading edge 430 of the first extension portion 412 has just passed a midpoint or midline 440 that defines the intersection of the upstream section 130 of the main plow 120 and the downstream section 140 of the main plow 120.
  • the bend or fold of the first extension portion 412 has increased past a folding an angle of 90 degrees relative to the body portion 406, and has thus changed from an obtuse angle to an acute angle.
  • FIG. 10E shows a fifth operational position 446, where a majority of the first extension portion 412 has moved past the upstream section 130 of the main plow 120. In this position, a trailing or upstream edge 452 of the first extension 412 is generally in vicinity of the midline 440 of the plows 120, 124.
  • FIG. 10F shows a sixth operational position 460, and only the upstream section 130 of the main plow 120 and the downstream section 154 of the inverted plow 124 are shown for clarity.
  • the downstream section 140 of the main plow 120 and the upstream section 152 of the inverted plow 124 are omitted for reasons of clarity so as to be able to visualize the position of the first extension portion 412.
  • this position only a small portion of the upstream or trailing edge 452 of the first extension portion 412 is still in contact with the upstream section 130 of the main plow 120.
  • the downstream or leading edge 430 of the first extension portion 412 is almost completely folded over the body portion 406.
  • the web 402 has further progressed further in the downstream direction to a seventh operational position 466 where the first extension portion 412 is almost fully folded over the body portion 406 and the web 402 is about to exit the plow at the downstream end 146.
  • the first extension portion 412 is shown completely folded over the body portion 406 in the eighth operational position 472 as the web 402 exits the web folding apparatus 800 and is released at the downstream end 146.
  • the folded web 402 is then transported on the conveyor 302 further downstream to a subsequent processing station, if required by the specific application.
  • a web folding apparatus 801 is shown according to an alternate embodiment wherein a second extension portion 802 may also extend outward from the body portion 406, which may be located on a lateral side of the body portion 406 opposite the first extension portion 412.
  • web folding apparatus 801 includes the combination of the main plow 120 and the inverted plow 124 described above with respect to web folding apparatus 800 and functions as the first folding station 820, which is configured to fold the first extension portion 412 over the body portion 406.
  • the second folding station 830 may be added, which may be substantially similar or identical to the first folding station 820 albeit constructed in an arrangement that mirrors that of first folding station 802.
  • the second folding station 830 may be located downstream from the first folding station 820, but need not necessarily be offset in the machine direction 310. In some embodiments, the first folding station 820 and second folding station 830 may be placed at the same longitudinal location relative to each other. [0038] While the invention has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the invention is not limited to such disclosed embodiments. Rather, the invention can be modified to incorporate any number of variations, alterations, substitutions or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the invention. Additionally, while various embodiments of the invention have been described, it is to be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description but is only limited by the scope of the appended claims.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

L'invention concerne un appareil de pliage de bande qui comprend une station de pliage comportant une extrémité amont et une extrémité aval, et qui comprend une charrue principale et une charrue inversée, la charrue principale comportant une partie de face incurvée de manière hélicoïdale qui se tord à travers un arc prédéterminé. La charrue inversée comporte une partie de face incurvée de manière hélicoïdale de forme complémentaire. La charrue principale est séparée de la charrue inversée d'une distance fixe le long d'un axe latéral de telle sorte que des parties de face des courbes respectives soient séparées de manière correspondante pour former une fente s'étendant vers l'extérieur avec des parois latérales parallèles définies par les parties de face de forme hélicoïdale respectives. Un collecteur à vide s'étend le long d'une longueur d'au moins l'une des charrues et suit son bord hélicoïdal. Le collecteur à vide crée un flux d'air vers le haut à partir d'une partie de base de la fente, le long des parois latérales de la fente, et vers le collecteur à vide.
PCT/US2024/027670 2023-05-08 2024-05-03 Charrue assistée par le vide et procédé Pending WO2024233324A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363500657P 2023-05-08 2023-05-08
US63/500,657 2023-05-08

Publications (1)

Publication Number Publication Date
WO2024233324A1 true WO2024233324A1 (fr) 2024-11-14

Family

ID=93430987

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2024/027670 Pending WO2024233324A1 (fr) 2023-05-08 2024-05-03 Charrue assistée par le vide et procédé

Country Status (1)

Country Link
WO (1) WO2024233324A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5486152A (en) * 1993-02-10 1996-01-23 Lever Brothers Company, Division Of Conopco, Inc. Carton closing plough and process
US5714027A (en) * 1996-03-22 1998-02-03 The Procter & Gamble Company Method of folding and handling a web of material in a continuous operation
US5807228A (en) * 1995-01-13 1998-09-15 F. L. Smithe Machine Company, Inc. Sheet folding method and apparatus
US20070107918A1 (en) * 2005-09-09 2007-05-17 The Procter & Gamble Company Folding system and process for a continuous moving web operation
US20210188468A1 (en) * 2019-12-19 2021-06-24 The Procter & Gamble Company Folding Apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5486152A (en) * 1993-02-10 1996-01-23 Lever Brothers Company, Division Of Conopco, Inc. Carton closing plough and process
US5807228A (en) * 1995-01-13 1998-09-15 F. L. Smithe Machine Company, Inc. Sheet folding method and apparatus
US5714027A (en) * 1996-03-22 1998-02-03 The Procter & Gamble Company Method of folding and handling a web of material in a continuous operation
US20070107918A1 (en) * 2005-09-09 2007-05-17 The Procter & Gamble Company Folding system and process for a continuous moving web operation
US20210188468A1 (en) * 2019-12-19 2021-06-24 The Procter & Gamble Company Folding Apparatus

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