EP2094874A1 - Dispositif de refroidissement pour des machines à amincir le cuir et machine à amincir le cuir dotée d'un tel dispositif - Google Patents

Dispositif de refroidissement pour des machines à amincir le cuir et machine à amincir le cuir dotée d'un tel dispositif

Info

Publication number
EP2094874A1
EP2094874A1 EP06832361A EP06832361A EP2094874A1 EP 2094874 A1 EP2094874 A1 EP 2094874A1 EP 06832361 A EP06832361 A EP 06832361A EP 06832361 A EP06832361 A EP 06832361A EP 2094874 A1 EP2094874 A1 EP 2094874A1
Authority
EP
European Patent Office
Prior art keywords
blade
thermal
station
machine
movable blade
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.)
Granted
Application number
EP06832361A
Other languages
German (de)
English (en)
Other versions
EP2094874B1 (fr
Inventor
Matteo Mascetti
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.)
Camoga SpA
Original Assignee
Camoga SpA
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 Camoga SpA filed Critical Camoga SpA
Publication of EP2094874A1 publication Critical patent/EP2094874A1/fr
Application granted granted Critical
Publication of EP2094874B1 publication Critical patent/EP2094874B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • C14B1/14—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using tools cutting the skin in a plane substantially parallel to its surface
    • C14B1/18—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using tools cutting the skin in a plane substantially parallel to its surface using band knives
    • 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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28—Splitting layers from work; Mutually separating layers by cutting
    • 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
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • 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
    • C14B1/14—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using tools cutting the skin in a plane substantially parallel to its 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
    • C14B17/14—Auxiliary devices for leather-working machines, e.g. grinding devices for blading cylinders or dust-removal devices combined with the working machines
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/46—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having an endless band-knife or the like

Definitions

  • the present invention relates to a cooling device for leather-splitting machines (in the following currently referred to as splitting machines) , and to a splitting machine provided with such a cooling device.
  • splitting machines operate in such a manner as to obtain semifinished products of leather, hide and similar material, and more particularly operate by equalising or dividing a given "raw” piece of hide into two semifinished pieces of smaller thickness (or into two pieces one of which will be a "finished piece” and the other "waste material") .
  • separation of the hide piece is carried out by making the hide piece move forward towards a cutting station consisting of a belt blade, driven in transverse motion relative to the hide advancing direction, and operating in co- operation with a counter-blade (also known in the particular technical field as "thickness ruler") of a wedge-shaped or cylindrical section.
  • the splitting machine blade must always be perfectly aligned and must not suffer from oscillations and/or movements out of the cutting plane; to this end, the blade is usually caused to slide through two guides
  • blade guides usually retained by steel or cast iron plates which in turn rest on the blade itself, almost always by gravity.
  • the movable blade is then submitted, during the machine operation, to a continuous slight rubbing on the flywheels that drive it in motion, and it also continuously carries out a slight-rubbing motion in the blade guide (and in conclusion it is submitted to important sliding-friction stresses) .
  • the weight intensity of the blade guides resting on the movable blade, the type of material to be split (leather, thin hide, crocodile and so on) and the climatic conditions give rise to heating of the movable blade and the blade-guide plate assembly to such an extent that temperatures as high as more than 5O 0 C can be reached.
  • the driving speed of the movable blade and the above described friction/pressure values of the hide piece under working generate an important amount of heat that spreads within the movable blade and the blade guide, causing thermal expansions that are detrimental to the cut accuracy/precision.
  • a (fixed or movable) blade when heated to such a high degree, ' easily loses its cutting capacity and is subjected to triggering of structural cracks that can cause breaking of the blade itself.
  • the high temperatures can also damage the blade guides worsening the relative smoothness of same and therefore producing a quicker wear of the movable blade sliding therethrough.
  • the more the blade guides are subjected to high operating temperatures the quicker they are worn out (and also the higher their cost is) .
  • overheating of the cutting station may constitute a hinder also from the point of view of safety and comfort for the operator of the splitting machine, who must manually move the hide piece being worked close to the cutting station and can therefore suffer from the high heat (or can even get burnt, coming into contact with the blade, guide blade and thickness ruler) .
  • the plate region (and more particularly the upper plate region) is the one also acted upon by the operator; the high temperatures obviously do not facilitate the operator's manoeuvring and make the workplace conditions and microclimate worse.
  • the present invention aims at conceiving a cooling device enabling the temperature of the blade guide and/or the movable blade to be lowered without the accuracy of the cutting action and the operation of the assembly for actuation of the movable blade being impaired.
  • the present invention also aims at conceiving a device enabling an operator to move close to the machine more safely, without suffering from the effects of heat generated during leather working and without running the risk of being accidentally burnt.
  • the splitting machine in accordance with the invention is generally identified with reference numeral 1 and substantially comprises a cutting station conveniently dedicated to receiving a hide piece to be worked and to division of same into thinner semifinished products .
  • a cooling device for splitting machines which in turn comprises heat removing means operatively associable with at least said cutting station; within the scope of the invention, the heat removing means operates by conduction.
  • a cutting station of a splitting machine can be advantageously provided with a device enabling the heat generated during use of the machine to be "picked up" and dispersed in the surrounding environment, preferably where it has no influence on the . operator .
  • the heat-removal modalities are based on heat transportation by conduction, because the heat generated during movement of the blade and cutting of the hide is transmitted to solid elements that usually consist of materials promoting conduction; therefore, it will be possible to remove heat in a "direct” or “indirect” manner from the operating blade since the latter absorbs the generated heat and in turn transmits it to the pieces or parts on which it is mounted, or which it contacts.
  • direct removal it is intended a thermal flux directly moving away from the objects to be cooled (first from the blade but also from the blade guide and/or the support means, as detailed below) , which thermal flux takes place directly from the blade to the cooling device
  • the heat removing means can therefore either "directly" cool the blade
  • the heat removing means comprises a thermal-energy carrier (preferably in a liquid state) and a movement circuit adapted to contain this thermal -energy carrier.
  • the thermal-energy carrier is caused to flow through suitable driving means (a pump for example) and the parameters of this circulation (such as pressure, flow rate, residence time in suitable circuit areas, thermal features of the carrier itself) are established based on current requirements; from an operating point of view, the driving means is therefore interlocked with the movement circuit to move the thermal-energy carrier in a reversible manner between a thermal-energy picking-up station 2 and a dissipation station 3.
  • suitable driving means a pump for example
  • the parameters of this circulation such as pressure, flow rate, residence time in suitable circuit areas, thermal features of the carrier itself
  • the movement circuit is formally divided into a thermal-energy picking-up station 2 (that in accordance with the present invention can be positioned near and/or in close proximity with pieces or parts of the splitting machine) and a dissipation station 3 connected in circuit to the thermal-energy picking-up station 2 and adapted to eliminate the heat stored by the thermal-energy carrier.
  • the pieces or parts close to which the thermal-energy picking-up station 2 can be positioned/mounted can advantageously consist of a thickness ruler and/or a movable blade (that typically is adapted to co-operate with the just mentioned thickness ruler to split at least one hide piece) , and/or of one or more blade guides operatively active at least on the movable blade, and/or of suitable support means (flywheels, plates, blocks, .kinematic mechanisms, linkages or others) for the thickness ruler, blade guides and movable blade.
  • suitable support means for the thickness ruler, blade guides and movable blade.
  • the thermal-energy picking-up station 2 can be positioned near . and/or in close proximity with the pieces or parts of the splitting machine from which the heat generated during sliding/rubbing of the movable blade on the different blade guides (and/or during splitting of the hide pieces) will be eliminated (through heat exchange by conduction) , said parts or pieces in turn having received said heat by conduction.
  • thermal-energy picking-up stations 2 one of which is such positioned that it removes heat from the movable blade and/or the lower guide of the movable blade
  • both stations 2 can also pick up thermal energy from the supports of said pieces .
  • thermo-energy removing means could also utilise natural or forced convection and/or radiation to remove heat from the surfaces of the pieces or parts that are intended to be cooled.
  • the thermal -energy picking-up station 2 can be at least partly formed inside predetermined pieces or parts of the splitting machine; in particular the most appropriate "pieces or parts" to this end can preferably be the so-called upper or lower "plate assemblies" and/or one or more blade guides and/or the movable blade itself.
  • the just described architecture can be obtained through suitable channels formed within the mentioned pieces or parts; therefore the thermal-energy carrier will be caused to flow within these pieces or parts and the required conductive thermal exchange will be carried out .
  • this splitting machine 1 further comprises cooling means acting by heat conduction and operatively associated with the thickness ruler and/or one or more blade guides and/or the movable blade and/or the support means .
  • this cooling means acting by heat conduction defines a cooling device in accordance with the above description and/or with the following claims; in particular, the cooling means and/or the thermal-energy picking-up station 2 can be formed within at least one thickness ruler and/or one or more blade guides and/or the support means .
  • the dissipation station 3 is positioned internally of a machine body of the splitting machine 1; this can be the case when a machine is made expressly and a suitable inner space for the dissipation station 3 has been provided which can consist of a refrigerating unit and/or a heat exchanger or equivalent means .
  • the dissipation station 3 may also be positioned externally of said machine body of the splitting machine 1; this may occur for example when the cooling device is mounted on an already existing machine that therefore is not provided with appropriate inner spaces. In this case it will be obviously also necessary to take into account the suitable positioning of the thermal-energy picking-up station 2 that can for example consist of suitable pipe coils inside which the thermal -energy carrier flows and which are put into contact with the pieces or parts to be cooled, and also provided must be the suitable circuit for the carrier that through appropriate piping must reach the dissipation station 3.
  • the invention enables achievement of important advantages .
  • the particular construction architecture of the cooling device enables efficient removal, through conduction, of the excess heat both from the blade and from the machine pieces co-operating with the blade (such as blade guides and/or supports for the blade guides) .
  • Heat removal by conduction further enables the cooling device to be easily integrated into a splitting machine, even in the case of an already existing machine, of which it improves the performance both in terms of quality of the cutting operation and in terms of duration of the different pieces submitted to wear.
  • the reduction in temperature of the pieces appearing in the cutting station not only enables improvement of the machinery performance, but also the operators' work conditions are improved; in particular, the likelihood of burns on the operators are reduced and the microclimate around the machinery is improved, so that the operators' life becomes more comfortable and they are no longer subjected to too much perspiration.
  • the present invention enables semifinished products of better quality to be obtained both as regards accuracy in cutting and absence of contamination by the operator's sweat.
  • the present invention can be advantageously employed in different production fields in which operation of a splitting machine is required, such as the shoe sector, leather and hide sector, tan sector, and also in the furniture manufacturing field (sofas, chairs, armchairs and the like made of leather), and so on.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Sawing (AREA)
  • Details Of Cutting Devices (AREA)

Abstract

L'invention concerne une machine à amincir comprenant une station de découpe dotée d'une règle d'épaisseur et d'une lame mobile, des guides de lame agissant au moins sur la lame mobile et des moyens de support pour les lames fixes ou mobiles et les guides de lame ; la machine comprend en outre des moyens de refroidissement pour effectuer un refroidissement par conduction thermique, qui est fonctionnellement associé à la règle d'épaisseur et/ou à la lame mobile et/ou aux guides et/ou aux moyens de support.
EP06832361A 2006-12-18 2006-12-18 Machine à amincir le cuir dotée d'un dispositif de refroidissement Not-in-force EP2094874B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2006/000852 WO2008075383A1 (fr) 2006-12-18 2006-12-18 Dispositif de refroidissement pour des machines à amincir le cuir et machine à amincir le cuir dotée d'un tel dispositif

Publications (2)

Publication Number Publication Date
EP2094874A1 true EP2094874A1 (fr) 2009-09-02
EP2094874B1 EP2094874B1 (fr) 2013-03-06

Family

ID=37988191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06832361A Not-in-force EP2094874B1 (fr) 2006-12-18 2006-12-18 Machine à amincir le cuir dotée d'un dispositif de refroidissement

Country Status (4)

Country Link
EP (1) EP2094874B1 (fr)
CN (1) CN101589159A (fr)
TW (1) TW200827451A (fr)
WO (1) WO2008075383A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1714243A (en) 1927-06-11 1929-05-21 Robinson Francis Joseph Leather-glazing machine
DE1813498A1 (de) 1968-12-09 1970-06-25 Fortuna Werke Maschf Ag Spaltmaschine
IT1134351B (it) * 1980-11-19 1986-08-13 Rizzi & Co Spa Luigi Macchina per la spaccatura di pelli con lama a nastro a filo tagliente in posizione fissa per qualunque spessore di taglio
EP0277122B1 (fr) 1985-10-15 1992-04-01 D'angelo Transport Pty. Ltd. Appareil et procede pour decouper du caoutchouc
DE4425771A1 (de) * 1994-07-21 1996-01-25 Fortuna Werke Maschf Ag Messer für eine Schärf- oder eine Spaltmaschine sowie Schärf- oder Spaltmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008075383A1 *

Also Published As

Publication number Publication date
TW200827451A (en) 2008-07-01
CN101589159A (zh) 2009-11-25
EP2094874B1 (fr) 2013-03-06
WO2008075383A1 (fr) 2008-06-26

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