EP2177632A1 - Machine for roller finishing skin, fake skin, fabrics, synthetic material and the like - Google Patents

Machine for roller finishing skin, fake skin, fabrics, synthetic material and the like Download PDF

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Publication number
EP2177632A1
EP2177632A1 EP09164731A EP09164731A EP2177632A1 EP 2177632 A1 EP2177632 A1 EP 2177632A1 EP 09164731 A EP09164731 A EP 09164731A EP 09164731 A EP09164731 A EP 09164731A EP 2177632 A1 EP2177632 A1 EP 2177632A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
machine
skin
rubber
coated
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
EP09164731A
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German (de)
French (fr)
Other versions
EP2177632B1 (en
Inventor
Gianni Maitan
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.)
GE MA TA SpA
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GE MA TA SpA
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Publication of EP2177632A1 publication Critical patent/EP2177632A1/en
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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
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/44—Mechanical treatment of leather surfaces
    • C14B1/56—Ornamenting, producing designs, embossing

Definitions

  • roller spreading machines are particularly used, commonly called “coating machines”, or “spreading machines”, in which the skin is preferably conveyed by a pair of feeding belts and deposited onto a lower cylinder or onto a rubber belt and where a countering upper spreading gravure cylinder, pressing down onto the skin surface, contrasted by the underlying cylinder or rubber belt, deposits a film of liquid product, previously distributed on the surface of the aforementioned gravure cylinder through a doctor blade, onto the aforementioned surface.
  • coating machines or “spreading machines”
  • the skin is preferably conveyed by a pair of feeding belts and deposited onto a lower cylinder or onto a rubber belt and where a countering upper spreading gravure cylinder, pressing down onto the skin surface, contrasted by the underlying cylinder or rubber belt, deposits a film of liquid product, previously distributed on the surface of the aforementioned gravure cylinder through a doctor blade, onto the aforementioned surface.
  • the gravure cylinder can rotate in "synchro” mode, i.e., in a direction in agreement with the advancing of the skin, or in "reverse”, i.e., in the opposite direction to the advancing of the skin.
  • a rubber conveyor belt is used, the wide surface of which ensures the skin to be stuck and pulled along
  • a rubber conveying and contrast cylinder is preferably used, in order to have a more precise contact between the gravure cylinder and the skin.
  • a perfect outcome of the finishing operation of skins apart from depending on a regular and constant pulling of the product in the spreading area, i.e. the area between the upper gravure cylinder and the underlying lower cylinder or conveyer belt, mainly depends on the spreading or "coating" action, i.e. the depositing action of liquid product on the entire surface of the material to be treated, by part of the gravure cylinder.
  • the rubber conveyer belt deforms with time and needs continual stops by the machine in order to straighten its surface as well as frequent replacement.
  • the purpose of the present finding is to make a machine for roller finishing skins and the like, which is able to carry out in an optimal way both the roller spreading operation and the design printing operation on any type of skins or the like, as well as eliminating the folds in the skins themselves.
  • the perfect stretching of the skins is obtained by positioning the front edge of the upper feeding belt immediately upstream of the narrowed area, under the tangent of the contact line between the gravure cylinder and the rubber-coated cylinder and by actuating the feeding belts at a lower speed than the peripheral speed of the rubber-coated cylinder itself.
  • the skin is also slightly curved and in tension, without folds and with open pores. In this way a consequent greater penetration of the dye and a uniform coating over the whole surface, is obtained.
  • the roller machine also called “coating machine” or “spreading machine”
  • the roller machine also called “coating machine” or “spreading machine”
  • V 1 indicates the speed of the feeding belts Ts and Ti
  • V 2 indicates the peripheral speed of the lower rubber-coated cylinder 1.
  • the speed V 1 is lower than V 2 .
  • the front edge of the upper feeding belt Ts will advantageously be positioned below the tangent contact line between gravure cylinder 2 and rubber-coated cylinder 1.
  • the two feeding belts "Ts" and “Ti” are able to be pressed against each other so as to be able to exert an adjustable pressure on the skin P.
  • the diameter "D" of the lower cylinder 1 is substantially greater than the diameter "d" of the upper gravure cylinder 2, for which reason the portion of skin which passes in the narrowed area "K” comes into tangent contact with the upper gravure cylinder 2 for the depositing of liquid dye product "C".
  • the portion of skin is adherent for a substantial angular opening "X", at the aforementioned lower rubber-coated cylinder, which makes up the conveying and contrast member, and can simultaneously be stretched by the braking action of the two feeding belts "Ts" and “Ti”, by effect of their speed V 1 , lower than the peripheral speed of the rubber conveying and contrast cylinder V 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Coating Apparatus (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

The finding regards a machine for roller finishing skin, fake skin, fabric, synthetic material and the like, also called "coating machine" or "spreading machine". In such a machine the skins (P) are fed by a pair of feeding belts (Ts, Ti) that are opposite one another, and deposited onto a lower rubber-coated cylinder (1) for conveying and contrasting, where an upper spreading cylinder, consisting of a gravure cylinder (2), pressing down on the surface (Pz) of the skin, countered by the underlying rubber-coated cylinder (1), deposits a film of liquid product (C) , previously distributed onto the surface (S) of the aforementioned upper gravure cylinder through a doctor blade (R), onto the aforementioned surface.
Such a machine is characterized in that the ratio between the diameter (D) of the lower rubber-coated cylinder (1) and the diameter (d) of the upper gravure cylinder (2) has a value equal to or greater than 1.5 (or rather D/d >= 1 ,5).

Description

  • The present finding regards the manufacture of a machine for roller finishing skin, fake skin, fabrics, synthetic material and the like, according to the general part of claim 1.
  • As it is known, for carrying out the finishing operation on skins in tanning, roller spreading machines are particularly used, commonly called "coating machines", or "spreading machines", in which the skin is preferably conveyed by a pair of feeding belts and deposited onto a lower cylinder or onto a rubber belt and where a countering upper spreading gravure cylinder, pressing down onto the skin surface, contrasted by the underlying cylinder or rubber belt, deposits a film of liquid product, previously distributed on the surface of the aforementioned gravure cylinder through a doctor blade, onto the aforementioned surface.
  • The gravure cylinder can rotate in "synchro" mode, i.e., in a direction in agreement with the advancing of the skin, or in "reverse", i.e., in the opposite direction to the advancing of the skin.
  • Generally, in "reverse" mode coating treatments, in particular with soft skin, a rubber conveyor belt is used, the wide surface of which ensures the skin to be stuck and pulled along, whereas in "synchro" mode printing operations with drawings and millepunti effects, a rubber conveying and contrast cylinder is preferably used, in order to have a more precise contact between the gravure cylinder and the skin.
  • A perfect outcome of the finishing operation of skins, apart from depending on a regular and constant pulling of the product in the spreading area, i.e. the area between the upper gravure cylinder and the underlying lower cylinder or conveyer belt, mainly depends on the spreading or "coating" action, i.e. the depositing action of liquid product on the entire surface of the material to be treated, by part of the gravure cylinder.
  • Such processing is problematic because the skins apart from not having a constant thickness, have folds on their surface due to previous processes as well as numerous defects such as scratches, scars, pinholes, brandmarks, etc; since all these imperfections are not covered by the chemical product, there is not a uniform distribution of the aforementioned over the entire surface of the skin itself.
  • Moreover, the rubber conveyer belt deforms with time and needs continual stops by the machine in order to straighten its surface as well as frequent replacement.
  • The purpose of the present finding is to make a machine for roller finishing skins and the like, which is able to carry out in an optimal way both the roller spreading operation and the design printing operation on any type of skins or the like, as well as eliminating the folds in the skins themselves.
  • Such a purpose is obtained with a roller spreading machine in which the ratio between the diameter of the lower rubber conveyer and contrast cylinder and the diameter of the upper gravure cylinder is equal to or more than 1.5. With such a constructive solution in the narrowed area between the two cylinders, a skin advancement channel is made, in which the base is defined by a radius of curvature of the pulling rubber-coated cylinder which is substantially greater than the radius of curvature of the overlying gravure cylinder, for which reason a wide contact area is obtained between the skin and the rubber conveyer cylinder which therefore functions, as well as with the precision of a cylinder, with the efficiency of the surface of a rubber belt, as far as the adhesion of the skin on the surface of the rubber-coated cylinder itself is concerned.
  • Moreover, the perfect stretching of the skins, by eliminating possible folds, is obtained by positioning the front edge of the upper feeding belt immediately upstream of the narrowed area, under the tangent of the contact line between the gravure cylinder and the rubber-coated cylinder and by actuating the feeding belts at a lower speed than the peripheral speed of the rubber-coated cylinder itself.
  • Laboratory tests and practical activities carried out in-house on machines with a diameter ratio between the lower rubber-coated cylinder and the upper gravure cylinder equal to or more than 1.5, have confirmed that also working in "reverse" mode, in which it is necessary for the force of friction value, which appears along the contact area between the gravure cylinder and the upper surface of the material to be treated, to be as low as possible and in any case to be less than the friction force value generated between the lower surface of the material and the lower rubber conveyer and contrast cylinder, the aforementioned material, be it skin, leather or the like, advances smoothly, without curling and without suffering any damage.
  • Moreover, positioning the edge of the upper feeding belt immediately upstream of the contact point between the gravure cylinder and the rubber-coated cylinder, under the tangent of the contact line between the two cylinders, apart from slowing down the speed of the two feeding belts compared to the peripheral speed of the rubber-coated cylinder itself, the skin is also slightly curved and in tension, without folds and with open pores. In this way a consequent greater penetration of the dye and a uniform coating over the whole surface, is obtained.
  • The finding shall be understood better from the description of a possible embodiment, given only as an example and not for limiting purposes, with the help of the attached drawing tables, where:
    • Fig.1 represents a perspective schematic view of the machine for finishing according to the finding:
    • Fig.2 represents a detailed view of the narrowed area, located between the two cylinders.
  • As can be seen from the figures, the roller machine, also called "coating machine" or "spreading machine", comprises two opposite skin feeding belts, indicated with the references "Ts" and "Ti", a conveying and contrasting member consisting of a lower rubber-coated cylinder 1, arranged facing towards an upper spreading gravure cylinder 2 to define a narrowed passage area "K", so as to allow a uniform film of liquid product "C", previously distributed on the gravure surface "S" of the upper gravure cylinder, through a doctor blade "R", to be deposited on the surface "Pz" of the skin "P".
  • In figure 1, V1 indicates the speed of the feeding belts Ts and Ti, whereas V2 indicates the peripheral speed of the lower rubber-coated cylinder 1. Advantageously, the speed V1 is lower than V2.
  • Moreover, the front edge of the upper feeding belt Ts will advantageously be positioned below the tangent contact line between gravure cylinder 2 and rubber-coated cylinder 1.
  • Moreover, the two feeding belts "Ts" and "Ti" are able to be pressed against each other so as to be able to exert an adjustable pressure on the skin P.
  • As can be seen in the figures, the diameter "D" of the lower cylinder 1 is substantially greater than the diameter "d" of the upper gravure cylinder 2, for which reason the portion of skin which passes in the narrowed area "K" comes into tangent contact with the upper gravure cylinder 2 for the depositing of liquid dye product "C".
  • At the same time, thanks to the wide radius of curvature of the lower cylinder 1, the portion of skin is adherent for a substantial angular opening "X", at the aforementioned lower rubber-coated cylinder, which makes up the conveying and contrast member, and can simultaneously be stretched by the braking action of the two feeding belts "Ts" and "Ti", by effect of their speed V1, lower than the peripheral speed of the rubber conveying and contrast cylinder V2.

Claims (4)

  1. MACHINE FOR ROLLER FINISHING SKINS, FAKE SKIN, FABRIC, SYNTHETIC MATERIAL AND THE LIKE, also called "coating machine" or "spreading machine", in which the skins (P) are fed by a pair of feeding belts (Ts, Ti) that are opposite one another, and are deposited onto a lower rubber-coated cylinder (1) for conveying and contrasting and where an upper spreading cylinder, consisting of a gravure cylinder (2), pressing down on the surface (Pz) of the skin (P), countered by the underlying rubber-coated cylinder (1) deposits a film of liquid product (C), previously distributed on the surface (S) of the aforementioned upper gravure cylinder through a doctor blade (R), onto the aforementioned surface.
    said machine being characterized in that:
    the ratio between the diameter (D) of the lower rubber-coated cylinder (1) and the diameter (d) of the upper gravure cylinder (2) has a value equal to or more than 1.5 (or rather D/d >= 1.5).
  2. MACHINE, according to claim 1, characterized in that the front edge of the upper feeding belt (Ts) is positioned under the tangent of the contact line between the gravure cylinder (2) and the rubber-coated cylinder (1)
  3. MACHINE, according to claims 1 and 2, characterized in that the opposite feeding belts (Ts, Ti) have a feeding speed (V1) which is lower than the peripheral speed (V2) of the lower rubber-coated cylinder (1).
  4. MACHINE, according to claim 3 characterized in that the two feeding belts (Ts, Ti) are able to be pressed against each other, so as to be able to exert an adjustable pressure on the skin (P).
EP09164731A 2008-10-09 2009-07-07 Machine for roller finishing skin, fake skin, fabrics and synthetic material Active EP2177632B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVI2008A000235A IT1392599B1 (en) 2008-10-09 2008-10-09 LEATHER ROLLER FINISHING MACHINE, FINAL LEATHER, FABRIC, SYNTHETIC AND SIMILAR MATERIAL

Publications (2)

Publication Number Publication Date
EP2177632A1 true EP2177632A1 (en) 2010-04-21
EP2177632B1 EP2177632B1 (en) 2012-05-02

Family

ID=41490496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09164731A Active EP2177632B1 (en) 2008-10-09 2009-07-07 Machine for roller finishing skin, fake skin, fabrics and synthetic material

Country Status (4)

Country Link
EP (1) EP2177632B1 (en)
AT (1) ATE556151T1 (en)
ES (1) ES2387181T3 (en)
IT (1) IT1392599B1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20100121A1 (en) * 2010-05-04 2011-11-05 Emanuele Falloppi CYLINDER TO BE MOUNTED ON MACHINES FOR THE FINISHING OF LEATHER ROLLS, FAKE LEATHER, FABRIC, PAPER SUPPORTS, SYNTHETIC AND SIMILAR MATERIALS, WHOSE EXTERNAL SURFACE IS ENGRAVED IN A WAY TO FORM GORGES WITH TREND IN VARIATION OF TILT.
ITVI20110217A1 (en) * 2011-08-02 2013-02-03 Ge Ma Ta Spa ROLLER COATING MACHINE FOR FINISHING LEATHER AND THE LIKE.
FR3026026A1 (en) * 2014-09-23 2016-03-25 Atelier Chastang Mecanique A C M APPARATUS FOR APPLYING A LIQUID MATERIAL SUCH AS A DYE ON A SUPPORT NOTABLY IN LEATHER
EP3103887A1 (en) * 2015-06-11 2016-12-14 GE.MA.TA. S.p.A. Machine for continuous dyeing of leather items
ITUA20164264A1 (en) * 2016-06-10 2017-12-10 Evolution Tech S R L INTRODUCTION FOR IRONING / PRINTING MACHINES
IT201800007456A1 (en) * 2018-07-24 2020-01-24 MACHINE FOR THE FINISHING OF FLEXIBLE LAMINARY SURFACES FOR COVERING OBJECTS
IT202100015041A1 (en) * 2021-06-09 2022-12-09 Ge Ma Ta Spa Production line for leather processing.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0484740A1 (en) * 1990-11-09 1992-05-13 Officine Di Cartigliano S.P.A. Roller dyeing machine for surface impregnating hides and similar products
EP0997538A2 (en) * 1998-10-30 2000-05-03 GE.MA.TA. S.p.A. Machine for finishing hides and the like
EP1441037A1 (en) * 2003-01-24 2004-07-28 Industrie Meccaniche Bergi-OFB S.p.A. Spreader machine for tannery hides

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0484740A1 (en) * 1990-11-09 1992-05-13 Officine Di Cartigliano S.P.A. Roller dyeing machine for surface impregnating hides and similar products
EP0997538A2 (en) * 1998-10-30 2000-05-03 GE.MA.TA. S.p.A. Machine for finishing hides and the like
EP1441037A1 (en) * 2003-01-24 2004-07-28 Industrie Meccaniche Bergi-OFB S.p.A. Spreader machine for tannery hides

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20100121A1 (en) * 2010-05-04 2011-11-05 Emanuele Falloppi CYLINDER TO BE MOUNTED ON MACHINES FOR THE FINISHING OF LEATHER ROLLS, FAKE LEATHER, FABRIC, PAPER SUPPORTS, SYNTHETIC AND SIMILAR MATERIALS, WHOSE EXTERNAL SURFACE IS ENGRAVED IN A WAY TO FORM GORGES WITH TREND IN VARIATION OF TILT.
ITVI20110217A1 (en) * 2011-08-02 2013-02-03 Ge Ma Ta Spa ROLLER COATING MACHINE FOR FINISHING LEATHER AND THE LIKE.
FR3026026A1 (en) * 2014-09-23 2016-03-25 Atelier Chastang Mecanique A C M APPARATUS FOR APPLYING A LIQUID MATERIAL SUCH AS A DYE ON A SUPPORT NOTABLY IN LEATHER
EP3103887A1 (en) * 2015-06-11 2016-12-14 GE.MA.TA. S.p.A. Machine for continuous dyeing of leather items
ITUA20164264A1 (en) * 2016-06-10 2017-12-10 Evolution Tech S R L INTRODUCTION FOR IRONING / PRINTING MACHINES
EP3255156A1 (en) 2016-06-10 2017-12-13 Evolution Tech Srl Introducer to be applied on machines for primary processing operations such as pressing, embossing, staking and finishing, on tanned leather, fake leather, fabric, synthetic material and others
IT201800007456A1 (en) * 2018-07-24 2020-01-24 MACHINE FOR THE FINISHING OF FLEXIBLE LAMINARY SURFACES FOR COVERING OBJECTS
EP3599289A2 (en) 2018-07-24 2020-01-29 DMS International Societa' a Responsabilita' Limitata Semplificata Machine for finishing flexible laminar surfaces used as coating of objects
EP3599289A3 (en) * 2018-07-24 2020-03-04 DMS International Societa' a Responsabilita' Limitata Semplificata Machine for finishing flexible laminar surfaces used as coating of objects
IT202100015041A1 (en) * 2021-06-09 2022-12-09 Ge Ma Ta Spa Production line for leather processing.

Also Published As

Publication number Publication date
EP2177632B1 (en) 2012-05-02
ATE556151T1 (en) 2012-05-15
ES2387181T3 (en) 2012-09-17
ITVI20080235A1 (en) 2010-04-10
IT1392599B1 (en) 2012-03-09

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