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EP0927768A2 - Engraved cylinder for fitting to machines for rolled finishing of hides, artificial hides, fabric, synthetic materials and the like - Google Patents

Engraved cylinder for fitting to machines for rolled finishing of hides, artificial hides, fabric, synthetic materials and the like Download PDF

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Publication number
EP0927768A2
EP0927768A2 EP98119184A EP98119184A EP0927768A2 EP 0927768 A2 EP0927768 A2 EP 0927768A2 EP 98119184 A EP98119184 A EP 98119184A EP 98119184 A EP98119184 A EP 98119184A EP 0927768 A2 EP0927768 A2 EP 0927768A2
Authority
EP
European Patent Office
Prior art keywords
honeycombs
cylinder
hides
engraved
helix
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
EP98119184A
Other languages
German (de)
French (fr)
Other versions
EP0927768A3 (en
EP0927768B1 (en
Inventor
Gianni Ing. Maitan
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GE MA TA SpA
Original Assignee
GE MA TA SpA
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Publication date
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Application filed by GE MA TA SpA filed Critical GE MA TA SpA
Publication of EP0927768A2 publication Critical patent/EP0927768A2/en
Publication of EP0927768A3 publication Critical patent/EP0927768A3/en
Application granted granted Critical
Publication of EP0927768B1 publication Critical patent/EP0927768B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0808—Details thereof, e.g. surface characteristics
    • 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
    • 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
    • C14B17/02—Blading cylinders or other working cylinders, e.g. slicking or scraping cylinders

Definitions

  • the present invention relates to the production of an engraved cylinder for use on machines designed for roller finishing of hides, artificial hides, fabric, synthetic materials and the like.
  • roller-machines are used in particular, more commonly known as dabbing machines or ⁇ roller-coaters ⁇ , in which the hides are carried by a lower roll or a rubber mat and pressed against an opposing embossed roller consisting of an engraved cylinder, which ensures the application to the surface of the hide of a uniform film of liquid product, previously distributed over the engraved surface of the said cylinder by means of one or several scrapers.
  • the engraved cylinder can rotate in "synchro”, that is to say in a manner in accordance with the direction of movement of the hide, or in "reverse”, that is to say in a manner contrary to the aforesaid direction.
  • the complete success of the hide finishing operation depends on many factors, among which the regular feeding of the hide into the restricted zone, that is to say that comprised between the engraved cylinder and the underlying roller or conveyor mat, and depends above all on an optimum application to the hide of the liquid impregnation product.
  • the conveying and application action of the finishing liquid product is achieved by means of the honeycombs, which form the honeycomb embossed surface of the engraved cylinder.
  • the embossing pattern may be of the negative impression type, used mainly for processing-work in "synchro", where the quantity of product applied to the hide is dependant on the dimensions of the honeycomb, or of the positive impression type, used in the main for processing-work in "reverse”, whereby the quantity of product to be applied to the hide, in addition to the dimensions of the honeycomb, also depends on the speed of rotation of the engraved cylinder.
  • Honeycombs with a negative impression are formed by small non-communicating cells, of a pyramidal or truncated-pyramidal shape with a base in the form of a square, hexagon or profile of whatsoever other polygon, of which the angle to the apex is variable between 30° and 120°.
  • the result of the coating of the product on the surface of the hide to be pigmented or coloured is associated with the quantity of product contained in each individual cell or honeycomb and by the spreading potential of the product itself.
  • a large number of small honeycombs per unit of surface of the engraved cylinder allows an improved product application effect to be achieved in relation to the use of an engraved cylinder having a honeycomb of a larger type of dimensions.
  • Honeycombs with a positive impression consist of a series of inter-communicating channels, which demarcate projections located in uniform manner and present a continuous triangular shape or truncated-pyramid shape, with a square or rhomboid base, having an angle to the apex varying between 30° and 120°.
  • honeycombs with a positive impression have the advantage of being able to distribute a large quantity of product, which is directly proportional to the speed of rotation under "reverse" working conditions of the engraved cylinder, thus allowing a very smooth processed hide surface to be obtained, resulting from the spatula-like effect of the projections of the engraved roll.
  • the honeycombs with a pattern of positive impression having a continuous helical pattern, of essentially triangular cross-section are produced with a helix angle sloping at 45°, that is to say with an axial pitch equal to the circumferential pitch, that value being the maximum possible used by the producers of engraved cylinders easier to produce to achieve satisfactory operation with the rolled finishing effect.
  • honeycombs having a helix slope with a minimum angle value of 50° up to a maximum angle value of 89°, in relation to the viscosity of the product to be applied, using low viscosity products (0 cps) to products with a high viscosity (10,000 cps).
  • helix slope prevents air being entrained into the fluid mass of product to be distributed which, causing an absence of homogeneity of the aforesaid product, is the cause of irregular distribution and consequently does not allow a smooth and mirror-like surface to be achieved.
  • roller 1 has a cylindrical part bearing a patterned surface 2 achieved by way of the honeycomb or grooves 3, of triangular section and helical development.
  • honeycombs or grooves 3 are reciprocally separated and demarcated by the helical projections 4 of trapezoidal section and helical development.
  • Fig.2 a detailed diagrammatic view of the pattern formed by the honeycombs or grooves is shown, and for greater clarity the parameters determining the helix angle of slope in relation to the axis of the body of the cylinder 1, the angle being determined by the following formula: wherein:

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Coating Apparatus (AREA)
  • Laminated Bodies (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

This concerns an engraved cylinder for use on machines for rolled finishing of hides, artificial hides, fabric, synthetic materials and the like of the type having an externally engraved surface so as to form grooves or honeycombs in a continuous helical pattern. The said cylinder is characterized in that the angle of slope of the helix of the said honeycombs in relation to the axis of the body of the cylinder lies between 50° and 85°.

Description

  • The present invention relates to the production of an engraved cylinder for use on machines designed for roller finishing of hides, artificial hides, fabric, synthetic materials and the like.
  • As it is known in carrying out the finishing operation in the field of the tannery industry, roller-machines are used in particular, more commonly known as dabbing machines or 〈〈roller-coaters〉〉, in which the hides are carried by a lower roll or a rubber mat and pressed against an opposing embossed roller consisting of an engraved cylinder, which ensures the application to the surface of the hide of a uniform film of liquid product, previously distributed over the engraved surface of the said cylinder by means of one or several scrapers.
  • The engraved cylinder can rotate in "synchro", that is to say in a manner in accordance with the direction of movement of the hide, or in "reverse", that is to say in a manner contrary to the aforesaid direction.
  • The complete success of the hide finishing operation depends on many factors, among which the regular feeding of the hide into the restricted zone, that is to say that comprised between the engraved cylinder and the underlying roller or conveyor mat, and depends above all on an optimum application to the hide of the liquid impregnation product.
  • The conveying and application action of the finishing liquid product is achieved by means of the honeycombs, which form the honeycomb embossed surface of the engraved cylinder.
  • The embossing pattern may be of the negative impression type, used mainly for processing-work in "synchro", where the quantity of product applied to the hide is dependant on the dimensions of the honeycomb, or of the positive impression type, used in the main for processing-work in "reverse", whereby the quantity of product to be applied to the hide, in addition to the dimensions of the honeycomb, also depends on the speed of rotation of the engraved cylinder.
  • Honeycombs with a negative impression are formed by small non-communicating cells, of a pyramidal or truncated-pyramidal shape with a base in the form of a square, hexagon or profile of whatsoever other polygon, of which the angle to the apex is variable between 30° and 120°.
  • The result of the coating of the product on the surface of the hide to be pigmented or coloured is associated with the quantity of product contained in each individual cell or honeycomb and by the spreading potential of the product itself.
  • Operationally, a large number of small honeycombs per unit of surface of the engraved cylinder allows an improved product application effect to be achieved in relation to the use of an engraved cylinder having a honeycomb of a larger type of dimensions.
  • Notwithstanding this, even with an embossed surface having a high honeycomb density the processed hide will never result in a perfectly smooth and mirror-like surface.
  • Honeycombs with a positive impression consist of a series of inter-communicating channels, which demarcate projections located in uniform manner and present a continuous triangular shape or truncated-pyramid shape, with a square or rhomboid base, having an angle to the apex varying between 30° and 120°.
  • Such honeycombs with a positive impression have the advantage of being able to distribute a large quantity of product, which is directly proportional to the speed of rotation under "reverse" working conditions of the engraved cylinder, thus allowing a very smooth processed hide surface to be obtained, resulting from the spatula-like effect of the projections of the engraved roll.
  • The simpler configuration with a positive impression, is the type so-called "continuous helical honeycomb".
  • In the present state of the art, the honeycombs with a pattern of positive impression having a continuous helical pattern, of essentially triangular cross-section, are produced with a helix angle sloping at 45°, that is to say with an axial pitch equal to the circumferential pitch, that value being the maximum possible used by the producers of engraved cylinders easier to produce to achieve satisfactory operation with the rolled finishing effect.
  • Such types of honeycombs, though having the advantage of extremely simple production, suffer two notable disadvantages:
    • the feeding of the hide into the restricted zone is particularly difficult, making soft hides impossible to process;
    • owing to the slope of the helix, the product to be applied tends to convey itself towards the end of the cylinder, thus causing its irregular distribution over the hides to be pigmented or coloured.
  • The use of engraved cylinders with positive impression honeycombs, in which the patterned face consists of intercrossing helical channels, inter-communicating in such a way as to form truncated pyramid projections with a square or hexagonal base, only eliminates the disadvantage of the lateral conveying of the product to be applied, but not the difficulty arising from the insertion of soft skins and in addition, when using high viscosity products, the patterning tends to mark the impression of the aforesaid projections on the surface of the hide or of the support to be pigmented.
  • Theoretical investigation of the behaviour of the fluid product to be spread over the hides and laboratory experimental tests have demonstrated however that positive results may be obtained with honeycombs having a helix slope with a minimum angle value of 50° up to a maximum angle value of 89°, in relation to the viscosity of the product to be applied, using low viscosity products (0 cps) to products with a high viscosity (10,000 cps).
  • In particular, when working under "reverse" conditions with the above helix slope angles of the honeycomb any tendency to a knurling impression effect on the surface of the hide can be eliminated.
  • In addition, as shown by feasibility tests, as the helix slope value increases, approaching a maximum value of 89°, the insertion operation of the said hide into the restricted zone is facilitated and the negative effect of the lateral accumulation of the product on the cylinder is all the smaller.
  • In addition, under "synchro" working conditions, with helix slope values in excess of 50°, the release of the product from the base of the honeycomb is facilitated and prevents the front border of the hide, the first to enter the restricted zone, from sticking to the patterned roller, owing to the adhesion effect caused by the fluid product and dropping only thereafter, giving rise to folds or curling, which damage or make the processed hide completely useless.
  • Finally, a high value of helix slope prevents air being entrained into the fluid mass of product to be distributed which, causing an absence of homogeneity of the aforesaid product, is the cause of irregular distribution and consequently does not allow a smooth and mirror-like surface to be achieved.
  • Such characteristics are illustrated by way of the appended drawings, provided for non-restrictive illustration purposes wherein:
    • - Fig. 1
    shows a patterned roller with the central part engraved with a helical pattern of honeycomb or grooves,
    - Fig.2
    represents a detailed view of the pattern, consisting of honeycombs or grooves, for which in the interest of clarity, the parameters are shown which determine the angle of slope of the helix in relation to the axis of the body of the cylinder.
    - Fig.3
    represents a detailed sectional view of the profile of the helical honeycomb or grooves according to line III-III in Fig. 2.
  • As may be seen from the illustrations the roller 1 has a cylindrical part bearing a patterned surface 2 achieved by way of the honeycomb or grooves 3, of triangular section and helical development.
  • The said honeycombs or grooves 3 are reciprocally separated and demarcated by the helical projections 4 of trapezoidal section and helical development.
  • In Fig.2 a detailed diagrammatic view of the pattern formed by the honeycombs or grooves is shown, and for greater clarity the parameters determining the helix angle of slope in relation to the axis of the body of the cylinder 1, the angle being determined by the following formula:
    Figure 00050001
    wherein:
    • Pe = p x z =
    the helix pitch, matching the space by which one point of the helix advances, parallel with the axis of the cylinder, during the course of one full rotation.
    where
    p =
    distance between two contiguous honeycombs or grooves of the helix.
    z =
    number of helixes contained in one helix pitch.
    D =
    cylinder external diameter
    D x π =
    external circumference of the cylinder

Claims (5)

  1. Engraved cylinder for fitting to machines for the rolled finishing of hides, artificial hides, fabric, synthetic materials and the like, of the type having an external engraved surface in such a manner as to form openings or honeycombs in a continuous helical pattern, characterized in that the angle of the helix slope of the said honeycombs in relation to the axis of the body of the cylinder is comprised between values of 50° and 89°, the said angle being determined by means of the formula:
    Figure 00060001
    wherein:
    Pe = p x z =
    the helix pitch, matching the space by which one point of the helix advances, parallel with the axis of the cylinder, during the course of one full rotation.
    where
    p =
    distance between two contiguous honeycombs or grooves of the helix
    z =
    number of helixes contained in one helix pitch.
    D =
    cylinder external diameter
    D x π =
    external circumference of the cylinder
  2. Engraved cylinder according to claim 1, characterized in that the honeycombs form a patterned surface with a negative impression.
  3. Engraved cylinder according to claim 1, characterized in that the honeycombs form a patterned surface with a positive impression.
  4. Engraved cylinder according to claims 1 and 2, characterized in that the honeycombs with a negative impression consist of continuous channels, preferably of triangular or trapezoidal cross-section, with an angle to the apex comprised between 30° and 120°.
  5. Engraved cylinder according to claims 1 and 3, characterized in that the honeycombs with a positive impression consist of a series of continuous channels in a helical pattern which demarcate projections located at regular intervals having a triangular or trapezoidal cross-section, with an angle to the apex variable between 30° and 120°.
EP98119184A 1997-12-31 1998-10-12 Engraved cylinder for fitting to machines for rolled finishing of hides, artificial hides, fabric, synthetic materials and the like Revoked EP0927768B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI970233 1997-12-31
IT97VI000233A IT1297531B1 (en) 1997-12-31 1997-12-31 ENGRAVED CYLINDER TO BE MOUNTED ON MACHINES FOR ROLLER FINISHING OF LEATHER, IMITATION LEATHER, FABRIC, SYNTHETIC MATERIALS AND SIMILAR

Publications (3)

Publication Number Publication Date
EP0927768A2 true EP0927768A2 (en) 1999-07-07
EP0927768A3 EP0927768A3 (en) 2000-05-24
EP0927768B1 EP0927768B1 (en) 2004-04-28

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ID=11426532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119184A Revoked EP0927768B1 (en) 1997-12-31 1998-10-12 Engraved cylinder for fitting to machines for rolled finishing of hides, artificial hides, fabric, synthetic materials and the like

Country Status (5)

Country Link
EP (1) EP0927768B1 (en)
AT (1) ATE265547T1 (en)
DE (1) DE69823476T2 (en)
ES (1) ES2219825T3 (en)
IT (1) IT1297531B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001029270A1 (en) * 1999-10-22 2001-04-26 Societe De Cuirs Et Peaux Method for treating skin and resulting skin
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.
CN102632740A (en) * 2012-04-25 2012-08-15 深圳市嘉拓自动化技术有限公司 Intaglio roller for coating battery material in intaglio printing device and manufacturing method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763370A (en) * 1986-05-30 1988-08-16 Darko Mance Apparatus and method for dyeing sheet articles
DE3927365A1 (en) * 1989-08-19 1991-02-21 Hans Amoser Applicator roller for coating low viscosity adhesive on foil - carries specified intersecting spiral grooves on its surface

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763370A (en) * 1986-05-30 1988-08-16 Darko Mance Apparatus and method for dyeing sheet articles
DE3927365A1 (en) * 1989-08-19 1991-02-21 Hans Amoser Applicator roller for coating low viscosity adhesive on foil - carries specified intersecting spiral grooves on its surface

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001029270A1 (en) * 1999-10-22 2001-04-26 Societe De Cuirs Et Peaux Method for treating skin and resulting skin
FR2800095A1 (en) * 1999-10-22 2001-04-27 Jerome Maini Skin treatment process for leather production comprises applying a finishing product layer containing pigments and/or dyes whilst the layer is still wet
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.
CN102632740A (en) * 2012-04-25 2012-08-15 深圳市嘉拓自动化技术有限公司 Intaglio roller for coating battery material in intaglio printing device and manufacturing method thereof

Also Published As

Publication number Publication date
ITVI970233A0 (en) 1997-12-31
DE69823476D1 (en) 2004-06-03
EP0927768A3 (en) 2000-05-24
DE69823476T2 (en) 2005-07-07
ES2219825T3 (en) 2004-12-01
IT1297531B1 (en) 1999-12-17
ITVI970233A1 (en) 1999-07-01
ATE265547T1 (en) 2004-05-15
EP0927768B1 (en) 2004-04-28

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