EP4215626A1 - Maschine zur verarbeitung von häuten - Google Patents

Maschine zur verarbeitung von häuten Download PDF

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Publication number
EP4215626A1
EP4215626A1 EP23151875.4A EP23151875A EP4215626A1 EP 4215626 A1 EP4215626 A1 EP 4215626A1 EP 23151875 A EP23151875 A EP 23151875A EP 4215626 A1 EP4215626 A1 EP 4215626A1
Authority
EP
European Patent Office
Prior art keywords
hide
processing
processing station
electric motor
machine
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
EP23151875.4A
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English (en)
French (fr)
Inventor
Alberto MARASTONI
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.)
Costruzioni Meccaniche Persico Srl
Original Assignee
Costruzioni Meccaniche Persico Srl
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 Costruzioni Meccaniche Persico Srl filed Critical Costruzioni Meccaniche Persico Srl
Publication of EP4215626A1 publication Critical patent/EP4215626A1/de
Pending legal-status Critical Current

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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
    • C14B17/00—Details of apparatus or machines for manufacturing or treating skins, hides, leather, or furs
    • C14B17/10—Arrangements for driving parts of leather-working machines
    • 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
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
    • C14B1/04—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using slicking, scraping, or smoothing-out cylinders or blades fixed on supports, e.g. cylinders, in a plane substantially at right angles to the working surface
    • 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
    • C14B17/06—Work feeding or clamping devices

Definitions

  • the present invention relates to a machine for processing hides.
  • Machines for processing hides which have, generally, conveyance means, which enable the advancement of the hide along an advancement route, and which are provided with at least one processing station, arranged along the advancement route of the hide and provided with elements that are designed to work on the hide to be processed.
  • the elements of the processing station that are designed to work on the hide can comprise a work cylinder which is rotated, about its own axis, by drive means, usually constituted by an electric motor, and which cooperates with a contrast element, arranged opposite thereto, the function of which is to keep the hide being processed held against the work cylinder.
  • the work cylinder is constituted by a scraper cylinder, which is provided with blades for removing superfluous surface portions or residues of previous processing from a face of the hide.
  • One problem with the machines described above is the problem of knowing the position of the hide being processed at the processing station and, in particular, of knowing the start time and end time of the processing executed on the hide in the processing station, so as to be able to activate or deactivate, on the basis of this knowledge, the movement of the hide made by the conveyance means therefor.
  • the command that enables the actuation of the conveyance means for the hide is imparted on the basis of signals originating from detector means of various types, such as photocells, vision systems, sensors, electromechanical switches or timers.
  • photocells as is known, produce a beam of electromagnetic radiation, which can be luminous or non-luminous and which is positioned so as to transversely pass through the advancement route of the hide.
  • photocells make it possible to send the above mentioned command to activate or deactivate the conveyance means for the hide, following the blocking by the hide of the beam produced by the photocells.
  • Vision systems can be of various types and substantially they detect the presence of the hides and, once this condition is detected, they actuate the required device.
  • vision systems are also subjected to soiling by the dirt present in the operational area of the machine.
  • sensors such as for example devices of the encoder type, which can identify a given position or the advancement of the conveyance means, by counting the number of displacement units executed by the conveyance means with respect to an initial position, and, as a function of this count, these encoder devices make it possible to determine the position of the hides arranged on the conveyance means.
  • the aim of the present invention is to provide a machine for processing hides that is capable of avoiding the drawbacks of the known art in one or more of the above mentioned aspects.
  • an object of the invention is to provide a machine for processing hides in which it is possible to detect with precision the position of the hide being processed.
  • Another object of the invention is to provide a machine for processing hides in which the detection of the position of the hide is not subject to the presence of fouling matter during the processing.
  • Another object of the invention is to provide a machine for processing hides, in which the detection of the position of the hides does not require a special positioning of sensors in order to be capable of operating correctly.
  • Another object of the present invention is to provide a machine for processing hides that is capable of offering the widest guarantees of reliability and safety in its operation.
  • a further object of the present invention is to overcome the drawbacks of the background art in a manner that is alternative to any existing solutions.
  • Another object of the invention is to provide a machine for processing hides that can be structurally simple to provide and which can be obtained using elements that are readily available on the market, so as to be competitive from a purely economic viewpoint as well.
  • the machine for processing hides comprises conveyance means 2 for the hide being processed along an advancement route and at least one processing station 3, which is positioned along the advancement route of the hide.
  • conveyance means 2 and each processing station 3 are arranged on a supporting structure 100 for the machine.
  • each processing station 3 is provided with at least one work cylinder 4, which can be actuated to rotate by an electric motor 5.
  • the machine is provided with detection means for detecting the position of the hide at the processing station 3.
  • the above mentioned detection means comprise detector means 6 for at least one electromechanical parameter correlated with the operation of the electric motor 5.
  • the conveyance means 2 are controlled by the detector means 6, so that the operation of the conveyance means 2 depends on the signals coming from the detector means 6.
  • control means 7 which are constituted, for example, by an electronic control unit, and which are functionally connected to the detector means 6 and are adapted to drive the conveyance means 2.
  • control means 7 are configured to vary the operation of the conveyance means 2 as a function of the values of the electromechanical parameter detected by the detector means 6.
  • the detector means 6 comprise a sensor 6a which is adapted to detect the electric current absorbed by the electric motor 5, which, as is known, varies as a function of the load acting on the motor itself.
  • control means 7 are configured to actuate the activation or the deactivation of the conveyance means 2 on the basis of the variation of the values of electric current absorbed by the electric motor 5, which are detected by the sensor 6a, with respect to at least one reference threshold value.
  • the machine can be provided, on the framework 100, with at least two processing stations 3 located along the advancement route of the hide which is defined by the conveyance means 2, between an entry zone 101 for the hide to be processed in the machine and an exit zone 102 for the processed hide from the same machine.
  • processing stations 3 are arranged one above the other.
  • the work cylinder 4 of each processing station 3 can be constituted, for example, by a scraper cylinder, i.e. by a cylinder that is fitted peripherally with blades designed to remove a surface layer of the hide being processed.
  • the working cylinders 4 of both processing stations 3 can be rotationally actuated by a single electric motor 5, which is connected to the working cylinders 4 via a mechanical transmission, constituted for example by a belt or a chain, or, as in the example shown in the figures, each one of the working cylinders 4 can be functionally connected to a respective electric motor 5 for actuating.
  • the detector means 6 are connected to the or to each electric motor 5 that actuates the working cylinders 4, and are in turn connected, advantageously, to the control means 7.
  • each electric motor 5 is connected to a respective sensor 6a, and each sensor 6a is connected to the control means 7.
  • each processing station 3 facing the work cylinder 4 of each processing station 3 is a respective abutment element 8, the function of which is to push the hide being processed against the work cylinder 4.
  • the abutment element 8 of each processing station 3 advantageously can move, with respect to the framework 100, between a closed or active position, in which it is held close to the corresponding work cylinder 4, so as to keep the hide in contact against the work cylinder 4, and an open or inactive position, in which it is kept away from the corresponding work cylinder 4, so as to allow the passage of the hide through the processing station 3, without the work cylinder 4 being able to act on the hide.
  • the conveyance means 2 comprise at least one entrainment assembly 9 for the hide, interposed between the processing stations 3.
  • the entrainment assembly 9 can be constituted by a pair of conveyor belts 9a, 9b, mutually opposite and rolling between at least one pair of transmission rollers 10, of which at least one is motorized, so as to define respective active entrainment portions, which face each other and each one of which is designed to engage a respective face of the hide being processed.
  • the conveyor belts 9a and 9b can be movable on command, with respect to the framework 100, between an operative condition, in which the corresponding active entrainment portions are mutually close together so as to be able to stay in contact with the hide to be processed, and an inoperative condition, in which the corresponding active entrainment portions are mutually spaced apart in order to not engage the hide to be processed.
  • the entrainment assembly 9 can move in rotation, with respect to the framework 100, about an axis that is substantially transverse to the longitudinal extension of the active entrainment portions 9a, 9b, between at least one first operative position, in which the active entrainment portions of the conveyor belts 9a, 9b are arranged substantially vertically, in order to enable the entrainment of the hide between one of the processing stations 3 and the next, and at least one second operative position, in which the active entrainment portions of the conveyor belts 9a, 9b are arranged substantially horizontally, in order to enable the entrainment of the hide toward the exit zone 102 of the machine.
  • the entrainment assembly 9 is advantageously provided with a frame, not shown, that supports the conveyor belts 9a, 9b and which is, in turn, mounted so that it can rotate on the framework 100.
  • second drive means 12 can comprise a motorized pinion, not shown, which is supported so that it can rotate by the frame of the entrainment assembly 9 and meshes with a toothed rack, also not shown, which is integral with the framework 100 and is contoured so that the rolling, along the toothed rack, of the pinion, by virtue of its rotary actuation, produces the movement of the entrainment assembly 9 with respect to the framework 100 between the first and the second operative position.
  • a motorized pinion not shown, which is supported so that it can rotate by the frame of the entrainment assembly 9 and meshes with a toothed rack, also not shown, which is integral with the framework 100 and is contoured so that the rolling, along the toothed rack, of the pinion, by virtue of its rotary actuation, produces the movement of the entrainment assembly 9 with respect to the framework 100 between the first and the second operative position.
  • the actuation of the conveyor belts 9a, 9b is conveniently done using first drive means 11, while the rotary motion of the entrainment assembly 9 between the first and the second operative position is achieved using second drive means 12.
  • the first drive means 11, and also the second drive means 12, are controlled by the detector means 6 and, in particular, they can be controlled by the control unit 7.
  • the conveyance means 2 can further comprise at least one feeding mat 13 which enables the movement of the hide to be processed from a loading station 14, where the operators will arrange the hide to be processed on the feeding mat 13, in order to bring it inside the machine, through the entry zone 101.
  • the feeding mat 13 is functionally connected for its actuation to third drive means 15.
  • the third drive means 15 are also controlled by the detector means 6 and, more specifically, they are controlled by the control means 7.
  • the operators arrange the hide to be processed on the feeding mat 13, at the loading station 14.
  • the third drive means 15 actuate the feeding mat 14 so that the hide is brought inside the machine through the entry zone 101.
  • the hide to be processed When the hide to be processed reaches the end of the feeding mat 14 that is opposite to the end where the loading station 13 is located, the hide to be processed begins to fall from the feeding mat 13, thus getting inserted between the abutment element 8 and the work cylinder 4 of the first processing station 3a and between the two conveyor belts 9a and 9b.
  • the work cylinder 4 of the first processing station 3a goes to work on the hide being processed, in cooperation with the abutment element 8, working on the second, rear half of the hide.
  • the sensor 6a connected to the electric motor 5 that actuates the work cylinder 4 of the first processing station 3a detects an increase in the electric current absorbed by the electric motor 5, at least with respect to a reference threshold value, for example an upper threshold value, owing to the increase in the contrasting torque acting on the work cylinder 4, by virtue of the action exerted by the latter on the hide being processed.
  • a reference threshold value for example an upper threshold value
  • the signals coming from the sensor 6a that detects the absorption of electric current of the electric motor 5 that actuates the work cylinder 4 of the first processing station 3a therefore indicate to the control means 7 that the work cylinder 4 of the first processing station 3 is executing the processing on the hide introduced into the machine.
  • the control means 7 can then intervene to deactivate the third drive means 15 in order to prevent the introduction of another hide to be processed into the machine, at least for as long as the hide inserted previously is being processed at the first processing station 3, or they can activate the signaling means for the operators, to alert them that the hide is being processed at the first processing station 3a.
  • the sensor 6a connected to the electric motor 5 that actuates the work cylinder 4 of the first processing station 3 detects a decrease in the electric current absorbed by the electric motor 5, with respect to a reference threshold value, for example a lower threshold value, by virtue of the reduction in the contrasting torque acting on the work cylinder 4.
  • the signals coming from the sensor 6a that detects the absorption of electric current of the electric motor 5 that actuates the work cylinder 4 of the first processing station 3a indicate to the control means 7 that the processing of the hide at the first processing station 3a is finished and, as a consequence, the control means 7 give the go-ahead for the second processing station 3b to begin the processing on the hide.
  • the control means 7 command the transition of the abutment element 8 of the second processing station 3b from the disengaged position to the engaged position and command the first drive means 11 to invert the direction of sliding of the active entrainment portions of the conveyor belts 9a, 9b, so that the processing of the first, front half of the hide may begin at the second processing station 3b.
  • the signals coming from the sensor 6a that detects the absorption of electric current by the electric motor 5 that actuates the work cylinder 4 of the second processing station 3b will therefore indicate to the control means 7 an increase in absorption of the electric current, with respect to the upper reference threshold value, due to the increase in the contrasting torque acting on the work cylinder 4 of the second processing station 3b.
  • the control means 7 activate the second drive means 12 in order to actuate the steady transition of the entrainment assembly 9 from the first angular position to the second angular position, so that the hide can be sent toward the exit zone 102, as shown in Figures 3 and 4 .
  • control means 7 will send the go-ahead to the first, second and third drive means 11, 12, and 15 to actuate the conveyor belts 9a, 9b, the entrainment assembly 9, and the feeding mat 14, so as to be able to begin processing on another hide to be processed.
  • the invention fully achieves the intended aim and objects, and in particular attention is drawn to the fact that the machine according to the invention makes it possible to detect with precision the position of the hide at its processing stations, and to know in particular the start time and end time of processing of the hide at its processing stations, this information being not influenced by dirt or other factors and without needing to resort to complex detection systems.
  • the detector means 6 can also be provided by a torque transducer associated with the shaft of the electric motors 5 that actuate the working cylinders 4 or with the working cylinders themselves.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Control Of Conveyors (AREA)
EP23151875.4A 2022-01-19 2023-01-17 Maschine zur verarbeitung von häuten Pending EP4215626A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200000782 2022-01-19

Publications (1)

Publication Number Publication Date
EP4215626A1 true EP4215626A1 (de) 2023-07-26

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ID=80933858

Family Applications (1)

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EP23151875.4A Pending EP4215626A1 (de) 2022-01-19 2023-01-17 Maschine zur verarbeitung von häuten

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EP (1) EP4215626A1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381031A2 (de) * 1989-01-31 1990-08-08 Conceria Mastrotto S.P.A. Vorrichtung zum Spannen von Leder auf einer Trocknungsfläche
EP1178120A2 (de) * 2000-07-04 2002-02-06 Teseo S.p.A. Vorrichtung zur lösbaren Befestigung von flachen Gütern wie Lederhäuten oder dergleichen auf einer Arbeitsfläche
EP2668104A1 (de) * 2011-01-26 2013-12-04 GIMA TT S.r.l. Befehls- und steuerungsvorrichtung zur steuerung und anweisung von betriebseinheiten einer verpackungsmaschine und entsprechendes verfahren
ITVE20120022A1 (it) * 2012-07-10 2014-01-11 Ger Elettronica S R L Dispositivo per alimentare pelli, particolarmente pelli bovine, ad una macchina arrotolatrice.
CN206375926U (zh) * 2016-12-31 2017-08-04 江西欧腾皮业有限公司 通过式挤水机
CN207845669U (zh) * 2018-01-18 2018-09-11 扬州扬宝机械有限公司 一种去肉机联动设备
CN210394408U (zh) * 2019-04-25 2020-04-24 东莞市具力自动化设备科技有限公司 一种多头双臂油边机
CN213447176U (zh) * 2020-07-15 2021-06-15 田超安 全自动直边折边机

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381031A2 (de) * 1989-01-31 1990-08-08 Conceria Mastrotto S.P.A. Vorrichtung zum Spannen von Leder auf einer Trocknungsfläche
EP1178120A2 (de) * 2000-07-04 2002-02-06 Teseo S.p.A. Vorrichtung zur lösbaren Befestigung von flachen Gütern wie Lederhäuten oder dergleichen auf einer Arbeitsfläche
EP2668104A1 (de) * 2011-01-26 2013-12-04 GIMA TT S.r.l. Befehls- und steuerungsvorrichtung zur steuerung und anweisung von betriebseinheiten einer verpackungsmaschine und entsprechendes verfahren
ITVE20120022A1 (it) * 2012-07-10 2014-01-11 Ger Elettronica S R L Dispositivo per alimentare pelli, particolarmente pelli bovine, ad una macchina arrotolatrice.
CN206375926U (zh) * 2016-12-31 2017-08-04 江西欧腾皮业有限公司 通过式挤水机
CN207845669U (zh) * 2018-01-18 2018-09-11 扬州扬宝机械有限公司 一种去肉机联动设备
CN210394408U (zh) * 2019-04-25 2020-04-24 东莞市具力自动化设备科技有限公司 一种多头双臂油边机
CN213447176U (zh) * 2020-07-15 2021-06-15 田超安 全自动直边折边机

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