WO2017137913A1 - Système de découpe d'articles présentant une extension plane collée sur un plan de travail aspirant, et procédé de découpe d'articles mis en oeuvre au moyen du système - Google Patents

Système de découpe d'articles présentant une extension plane collée sur un plan de travail aspirant, et procédé de découpe d'articles mis en oeuvre au moyen du système Download PDF

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Publication number
WO2017137913A1
WO2017137913A1 PCT/IB2017/050701 IB2017050701W WO2017137913A1 WO 2017137913 A1 WO2017137913 A1 WO 2017137913A1 IB 2017050701 W IB2017050701 W IB 2017050701W WO 2017137913 A1 WO2017137913 A1 WO 2017137913A1
Authority
WO
WIPO (PCT)
Prior art keywords
aspirating
source
depression
cutting
sectors
Prior art date
Application number
PCT/IB2017/050701
Other languages
English (en)
Inventor
Gianni Gallucci
Original Assignee
Teseo S.P.A.
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 Teseo S.P.A. filed Critical Teseo S.P.A.
Priority to EP17711327.1A priority Critical patent/EP3414349B1/fr
Priority to CN201780010757.0A priority patent/CN108699610A/zh
Publication of WO2017137913A1 publication Critical patent/WO2017137913A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B5/00—Clicking, perforating, or cutting leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/018—Holding the work by suction
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B17/00—Details of apparatus or machines for manufacturing or treating skins, hides, leather, or furs
    • C14B17/04—Work-supports or other counter-pressing elements; Bed rolls or counter-pressing rolls
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials

Definitions

  • the present invention relates to the technical sector concerning the cutting of articles having a flat extension, for example leather sheets, by use of suitable tools, for example a vibrating or non-vibrating blade; in the following reference will be made, by way of non-limiting example, to leather sheets.
  • the cut is carried out with the leather sheet stretched on an aspirating plane on which it is sealedly maintained with depression values that are known to the expert in the sector, for example comprised between a minimum value of about 3 Kpa and an optimal value of about 20 Kpa: the latter value ensuring a cutting velocity of about 50 m/min.
  • the aspirating plane is divided into sectors, singly connectable to a source of depression; only the sectors totally or partly covered by the leather sheet are connected to the source (aspirating pump).
  • the sectors of the aspirating plane that are partly uncovered, as they are involved by the edges of the leather sheet, can cause an anomalous increase in the flow rate of the pump (for example more than 3000 mc/h), sufficient to cause an overload of the motor activating the pump.
  • Various technical solutions have been proposed for limiting the above- mentioned drawback.
  • the edges of the leather sheet can be manually covered using a non-breathable covering material so as to cover the sectors involved by the edges entirely. This involves employing operators and the need to work on pieces of leather sheet obtained by the cut so as to clean them from the covering material which is in part cut; further, if the operators are inexpert the risk of waste of materials is significant.
  • the aim of the invention is to provided a system for cutting articles having a flat extension arranged adheringly on an aspirating work plane, which obviates the drawbacks of the prior art.
  • a further aim of the present invention is to provide a system for cutting articles which enables, with respect to the prior art, an increase in productivity, an increase in the performance of the leather sheet and a reduction in energy consumption due to the functioning of the aspirating means with which the leather sheet is removably blocked to the aspirating plane.
  • a further aim of the invention is to provide a method for cutting articles, for example leather sheets, that can be actuated with the above-described system.
  • FIG. 1A, 1 B schematically illustrate a view of the aspirating work plane, in which the present invention is operative, and represent two moments relative to the cutting carried out along the profile of two shapes;
  • figure 1 C illustrates a lateral view of detail Y of figures 1A, 1 B;
  • FIG. 2 is a perspective view of a portion of the aspirating work plane, illustrated overturned with respect to a use configuration thereof, with some parts removed better to evidence others;
  • figure 3 illustrates detail K of figure 2, in larger scale with respect to figure 2;
  • - figure 4 is a perspective view of a portion of the aspirating work plane, for example detail X of figure 1 B, illustrated overturned with respect to a use configuration thereof;
  • - figure 5 is an illustration a perspective view of a connecting device between a sector of the aspirating plane and one or the other of two pneumatic circuits;
  • - figure 6 is a perspective view of a cutaway of the device of figure 5;
  • FIG. 7A, 7B, 7C illustrate, according to three sectioned plan views along a horizontal plane, the device of figures 5 and 6 in three characteristic use configurations.
  • reference numeral 1 denotes an aspirating work plane comprising a plurality of sectors 2, not communicating with one another (figure 3), each of which sectors 2 affords through-holes 3 communicating on a side thereof with an upper surface of the plane 1 and on another side thereof with a gap 4 delimited by the lower surface of the plane 1 , by closing panels 5 and by a perimeter edge 6.
  • An outlet 7 opens into the central part of the panel 5 of a connecting device 8 provided with two inlets 9, 10, respectively a first and second inlet.
  • the first inlet.9 is connectable to a first pneumatic circuit, comprising a conduit 11 for each sector 2, connected to the first inlet, branching from a relative manifold 12 (of which only one is illustrated in the accompanying figures: see figure 4) supplied by a first piping 13 which is placed in depression by a first aspirating source (not illustrated) with a predetermined flow rate and depression.
  • reference numeral 14 denotes a supply chamber delimited by panels 5, by a wall 15 underlying the panels and by a perimeter edge 16.
  • the second inlets 10 of the connecting devices 8 are supplied by a second pneumatic circuit comprising the above-mentioned chamber 14, into which the second inlets open 10, and a second piping 17 connecting the chamber 14 with a second supply source, not illustrated, having a predetermined flow rate and depression.
  • the depression generated by the second source is significantly greater than the depression generated by the first aspirating source.
  • the depression created by the second source is in the order of 20 Kpa, while the depression generated by the first source is in the order of 3Kpa.
  • a rotor 19 is arranged internally of each connecting device 8, which rotor 19 is activated by an actuator 18, for example an electric motor.
  • the motor 18 can impose three distinct configurations on the rotor 19:
  • a cutting device operates above the aspirating plane 1 , not illustrated in detail as it is known to the expert in the sector, of which the blade 20 is schematically represented, which can be either vibrating or non- vibrating; this device is controlled and commanded by a suitable control unit 50 denoted schematically as of known type to the expert in the sector.
  • This control unit controls and commands the actuators 18: see the connections "a".
  • the leather sheet is arranged on the aspirating plane 1 ; using known methods the orientation and positioning of the leather sheet on the plane 1 is detected: the relative data is transmitted to the control unit 50.
  • the sectors 2A covered by the leather sheet, and the sectors 2B partly covered by the leather sheet, are connected using relative connecting devices 8 (located in the second configuration C 2 : figure 7B) to the first aspirating source; the free sectors 2, i.e. those not involved by the leather sheet, are not subjected to aspiration (the relative connecting devices 8 are in the first configuration figure 7A).
  • a pressure detector (not illustrated) is included, controlled by the control unit, with which the minimum depression guaranteeing that the leather sheet does not lift at the edges thereof is maintained.
  • the control unit 50 is used to memorise the profiles, or shapes, F,F (as well as the mutual positioning thereof with reference to the perimeter extension of the leather sheet) corresponding to the pieces 70, 71 that can be fashioned from the leather sheet; this is done either following the blocking of the leather sheet on the plane 1 or prior thereto: in this case a code is ascribed to the leather sheet, in combination with the detecting of the positioning of the leather sheet P on the plane 1 , so that the control unit contains the data relative to the positioning and orientation of each shape.
  • the control unit intervenes to command the cutting device so as to arrange it at the position of a shape F: see figure 1 A.
  • the shape totally or partially covers a series of sectors 2C; in figure 1A, from among the sectors, 2* is used to denote the sector that the blade 20 is involved with.
  • the sector 2* is connected to the second aspirating source (the relative connecting device 8 is located in the third configuration C 3 ) only for the time necessary for the blade 20 to pass through the sector.
  • the blade gradually passes through the various sectors 2C with the aim of involving the whole profile F: in this way the corresponding piece 70 is obtained.
  • Figure 1 B illustrates both a further shape Ft (which defines a corresponding piece 71 ) and the sector 2* which, being subjected to the second source, enables cutting a portion of the shape and at the same time prevents lifting of the adjacent edge of the piece 70 previously cut.
  • the system of the invention is extremely versatile inasmuch as, when required, instead of only subjecting the sector 2* to the maximum aspiration, it is possible also to subject the sectors 2C, associated to the shape F, to a maximum aspiration.
  • an aspirating plane 1 is made available, subjected to two pneumatic circuits, with different diameters and rigidity, provided with relative depression sensors; the switching of the connection of the sectors 2 of the plane 1 is controlled by the control unit.
  • the first pneumatic circuit comprises the first aspirating source which generates a flow rate with a low depression.
  • the second pneumatic circuit comprises the second aspirating source which generates a high depression, but with a limited flow rate.
  • the system of the present invention provides various advantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

L'invention concerne un système de découpe d'articles présentant une extension plane collée sur un plan de travail aspirant, le plan de travail étant défini par des secteurs (2) ne communiquant pas entre eux, chaque secteur (2) comprenant des trous débouchants (3) communiquant sur un de leurs côtés avec une surface supérieure du plan (1) et sur un autre de leurs côtés avec un espace (4), le système étant défini par une unité de commande (50) dans laquelle des formes ((F, F1) sont mémorisées, mutuellement positionnées par rapport à un développement de périmètre d'un article correspondant (P) positionné sur le plan d'aspiration; un dispositif de découpe, opérant au-dessus du plan d'aspiration, contrôlé et commandé par l'unité de commande pour découper l'article le long des profils des formes (F, F1) afin d'obtenir un même nombre de pièces (70, 71) ; un premier circuit pneumatique, comprenant une première source d'aspiration d'une dépression prédéterminée, pouvant être raccordé sélectivement à chacun des espaces (4) par des premiers moyens commandés par l'unité de commande (60) ; un second circuit pneumatique, comprenant une seconde source d'aspiration d'une dépression supérieure à la dépression générée par la première source d'aspiration, pouvant être raccordé sélectivement à chacun des espaces (4) par des seconds moyens commandés par l'unité de commande; l'unité de commande est destinée à mettre en oeuvre à la fois les seconds moyens par rapport à au moins un secteur (2*) parmi les secteurs (2C) totalement et partiellement recouverts par la forme (F, F1) obtenue par le dispositif de découpe, et les premiers moyens se rapportant au moins aux secteurs (2B) totalement et partiellement recouverts par la partie de l'article non associée à la forme (F, F1).
PCT/IB2017/050701 2016-02-12 2017-02-09 Système de découpe d'articles présentant une extension plane collée sur un plan de travail aspirant, et procédé de découpe d'articles mis en oeuvre au moyen du système WO2017137913A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17711327.1A EP3414349B1 (fr) 2016-02-12 2017-02-09 Système de découpe d'articles présentant une extension plane collée sur un plan de travail aspirant, et procédé de découpe d'articles mis en oeuvre au moyen du système
CN201780010757.0A CN108699610A (zh) 2016-02-12 2017-02-09 用于切割具有吸附地布置在吸气工作平面上的平直伸展范围的物品的系统以及使用该系统进行切割物品的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000014442 2016-02-12
ITUB2016A000703A ITUB20160703A1 (it) 2016-02-12 2016-02-12 Sistema per il taglio di articoli a sviluppo piano disposti in aderenza su un piano di lavoro, e metodo per il taglio di articoli attuato con detto sistema

Publications (1)

Publication Number Publication Date
WO2017137913A1 true WO2017137913A1 (fr) 2017-08-17

Family

ID=55948987

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/050701 WO2017137913A1 (fr) 2016-02-12 2017-02-09 Système de découpe d'articles présentant une extension plane collée sur un plan de travail aspirant, et procédé de découpe d'articles mis en oeuvre au moyen du système

Country Status (4)

Country Link
EP (1) EP3414349B1 (fr)
CN (1) CN108699610A (fr)
IT (1) ITUB20160703A1 (fr)
WO (1) WO2017137913A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0566817A1 (fr) * 1992-04-21 1993-10-27 GFM Gesellschaft für Fertigungstechnik und Maschinenbau Aktiengesellschaft Procédé et table de découpe pour couper des matériaux pouvant former des plis, en particulier le cuir
DE19521616C1 (de) * 1995-06-14 1997-07-17 Felber Peter Verfahren zur Bedienung eines Arbeitstisches einer Schneideinrichtung und Arbeitstisch zur Durchführung dieses Verfahrens
US5953232A (en) * 1996-04-02 1999-09-14 Gfm Gmbh Method of cutting out blanks from, irregular workpieces of sheet material
WO2014202203A1 (fr) * 2013-06-18 2014-12-24 Atom S.P.A. Table de coupe à aspiration différenciée pour stabiliser le matériau à couper

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930012210B1 (ko) * 1990-11-16 1993-12-24 무도오 고오교오 가부시기가이샤 자동제도기에 있어서의 통기성 시이트의 제도 및 커팅방법 및 형지 복사시이트
JP5332929B2 (ja) * 2009-06-15 2013-11-06 セントラル硝子株式会社 シート材の切断方法および装置
CN101660010B (zh) * 2009-09-21 2013-03-13 东莞市爱玛数控科技有限公司 皮料排版方法及实施该方法的排版机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0566817A1 (fr) * 1992-04-21 1993-10-27 GFM Gesellschaft für Fertigungstechnik und Maschinenbau Aktiengesellschaft Procédé et table de découpe pour couper des matériaux pouvant former des plis, en particulier le cuir
DE19521616C1 (de) * 1995-06-14 1997-07-17 Felber Peter Verfahren zur Bedienung eines Arbeitstisches einer Schneideinrichtung und Arbeitstisch zur Durchführung dieses Verfahrens
US5953232A (en) * 1996-04-02 1999-09-14 Gfm Gmbh Method of cutting out blanks from, irregular workpieces of sheet material
WO2014202203A1 (fr) * 2013-06-18 2014-12-24 Atom S.P.A. Table de coupe à aspiration différenciée pour stabiliser le matériau à couper

Also Published As

Publication number Publication date
CN108699610A (zh) 2018-10-23
EP3414349A1 (fr) 2018-12-19
EP3414349B1 (fr) 2020-12-09
ITUB20160703A1 (it) 2017-08-12

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