EP0330720A1 - Rouleau hydrostatique de dosage précis avec visualisation de déplacement en commandant des supports hydrostatiques - Google Patents

Rouleau hydrostatique de dosage précis avec visualisation de déplacement en commandant des supports hydrostatiques Download PDF

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Publication number
EP0330720A1
EP0330720A1 EP88103375A EP88103375A EP0330720A1 EP 0330720 A1 EP0330720 A1 EP 0330720A1 EP 88103375 A EP88103375 A EP 88103375A EP 88103375 A EP88103375 A EP 88103375A EP 0330720 A1 EP0330720 A1 EP 0330720A1
Authority
EP
European Patent Office
Prior art keywords
hydrostatic
dosing
roller
pads
millesimal
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
EP88103375A
Other languages
German (de)
English (en)
Other versions
EP0330720B1 (fr
Inventor
Giovanni Dr. Ing. Mosca Tenna
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.)
RITRAMA SpA
Original Assignee
RITRAMA 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 RITRAMA SpA filed Critical RITRAMA SpA
Priority to EP88103375A priority Critical patent/EP0330720B1/fr
Priority to AT88103375T priority patent/ATE80350T1/de
Priority to DE8888103375T priority patent/DE3874520T2/de
Publication of EP0330720A1 publication Critical patent/EP0330720A1/fr
Application granted granted Critical
Publication of EP0330720B1 publication Critical patent/EP0330720B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B05C1/0826—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 the work being a web or sheets
    • B05C1/0834—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 the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B65C9/20—Gluing the labels or articles
    • B65C9/22—Gluing the labels or articles by wetting, e.g. by applying liquid glue or a liquid to a dry glue coating

Definitions

  • the present invention refers to a dosing roller for coating machines, with hydrostatic pads for the rotation hydrostatic pads for adjustment and hydrostatic pad for control of the visualized displacement for millesimal dosing.
  • the novelty of the invention consists essentially in providing a dosing roller for coating machines with a number of hydrostatic pads.
  • a set of hydrostatic pads serve as rolling bearing, which by the stiffness of its system eliminates all the mechanical slacks;
  • another set of hydrostatic pads serves to adjust the displacement of its axis with reference to the axis of its supports;
  • two hydrostatic pads serve to check the occurred displacement.
  • the novelty consists essentially in the fact that by the rotation of the dosing cylinder on high-pressure hydrostatic pads and by the introduction of a valve which controls the oil flow to the pads both the cylinder displacement and its absolutely perfect rotation can be obtained.
  • the distance between the dosing roller and the roller which supports the material (or the feeding roller in the case of an indirect coating machine) defines the quantity of coated product. For this reason the dosing roller is provided with mechanical approach systems (levers or slides) which are manufactured with the best possible accuracy.
  • the applicant doesn't know any kind of coating dosing roller for adhesive, which is provided with pads for the visualized hydrostatic adjustment and which has the features of the subject one.
  • the present invention aims to obtain: - absolute accuracy in the rotation of the dosing roller - very high stiffness of the system, exceeding 500 kg/micron and up to 1000 kg/micron approx. - visualized infinitesimal adjustment of the displacement of the roller - positive elimination of any error of basic weight coming from mechanical factors.
  • the originality of the invention consists essentially in the fact that the thickness of the oil meatus and then the position of the roller can be adjusted without the use of devices with mechanical fittings. Exploiting the same principle of hydrostatic reaction and inserting a specific pad, the displacement which is originated by the control valve can be visualized by means of a simple gauge, which indicates the variation of the oil pressure.
  • the present invention refers to a hydrostatic dosing roller with millesimal dosing for coating machines, which is characterized by the fact that it includes hydrostatic pads for the rotation, hydrostatic support pads for the millesimal adjustment of the displacement of said roller and hydrostatic control pads for the visualization of the even millesimal displacements, to obtain coating with millesimal dosing accuracy.
  • the carrying structure must be built by electric-welded and stabilized rugged metallic structural work, the hydrostatic pads are realized on a thick central shaft in order to avoid any load deformation.
  • the rotating rollers are drived by DC motors in order that the production rate and the adhesive dosing can be varied.
  • the machine is provided with a scraping blade for the cleaning of the adhesive dosing roller and with shoulders to hold the adhesive.
  • the hard-rubberized roller which carries the material is drived by hydraulic cylinders in order to control the pressure on the coating roller; in case of stopping of the system the separation is automatically obtained by means of mechanical cams or by means of manual contrasting precision screws.
  • the quantity of adhesive, which is laid down on the support depends both on the rotation speed of the coating roller and on the distance between the surfaces of the dosing roller and of the coating or feeding roller.
  • the dosing roller rotates on eight rolling pads, which are fed by fixed laminar resistors; their design is according to the theory of lubrication of the cylindrical garrying pins and to the theory of the hydrodynamic sustentation of the variable-­thickness meatus.
  • a stiffness varying from 500 kg/micron up to 1000 kg/micron can be obtained with a perfect rolling.
  • the quantity of adhesive which is carried (coated) depends on the speed of the coating roller B, on the speed of the dosing roller A and on the distance between their surfaces.
  • the thickness 5 of the adhesive and the control of its value it is necessary to be able to adjust with the desidered accuracy the distance between the dosing roller A and the coating roller B, through which the adhesive 6 flows.
  • the accuracy of the distance is mainly obtained by a high stiffness of the system.
  • the stiffness of the system is obtained by eight rotation pads PR1 of the hydrostatic roller (figures 3 and 4) which are realized on the central shaft 9 and are fed by eight fixed laminar resistors R1 (figures 2 and 4); the stiffness which can be achieved ranges between 500 kg/micron and 1000 kg/micron approx.
  • valves V1 and V2 it is possible to vary the oil flow and then the thickness of the meatus, moving away and bringing near the dosing roller A and the coating roller B with the highest accuracy.
  • the pressure measurement comes from the average span of the meatus and from a large contact surface (surface of the controlling pads), it results absolutely stable and significant; such measurement can be amplified as desidered by the designer according to the working requirements.
  • the machine must be fed continuously with adhesive 6 between the coating roller B and the dosing roller A.
  • the adhesive has lateral holding shoulders 10 to avoid the overflow.
  • the quantity of adhesive which lays itself down on the support film depends on the distance between the coating roller B and the dosing roller A.
  • the dosing roller is chromium plated and motorized by a DC motor; it is adjustable to increase or decrease the distance from the coating roller and then to dose the quantity of adhesive on the film; the distance is adjusted acting on the above described valves V1 and V2.
  • the dosing roller is provided with a scraping blade (11) for its continuous cleaning.
  • the chromium plated and motorized by a DC motor coating roller B rotates in opposite direction with reference to the dosing roller A and to the rubberized roller C.
  • the rubberized roller C is motorized by a DC motor and it is mounted on levers which are drived by hydraulic cylinders; the hydraulic cylinders allow the adjustment of the pressing of the material on the coating roller and the laying of the adhesive (5) on the film (4).
  • high-precision micrometric mechanical adjusters (12) are mounted on the levers of the rubberized roller.
  • a layer of adhesive is laid down on the hard-rubberized roller C which carries the adhesive support material 4 (tape which has to become adhesive) by means of the coating roller B; the quantity 5 of adhesive which is laid down on the support 4 depends on the rotation speed of the coating roller B and of the dosing roller A and on the distance between their surfaces.
  • the thickness of the adhesive layer For the determination of the thickness of the adhesive layer and the control of its value it is necessary to succeed to adjust with the desidered accuracy the distance through which the adhesive flows between the dosing roller A and the coating roller B. This accuracy and then the evenness of the basic weight of the adhesive depends also on the stiffness of the cylinder.
EP88103375A 1988-03-04 1988-03-04 Rouleau hydrostatique de dosage précis avec visualisation de déplacement en commandant des supports hydrostatiques Expired - Lifetime EP0330720B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP88103375A EP0330720B1 (fr) 1988-03-04 1988-03-04 Rouleau hydrostatique de dosage précis avec visualisation de déplacement en commandant des supports hydrostatiques
AT88103375T ATE80350T1 (de) 1988-03-04 1988-03-04 Hydrostatische dosierrolle mit anzeige der verschiebung durch steuerung von hydrostatischen traegern zu feiner dosierung.
DE8888103375T DE3874520T2 (de) 1988-03-04 1988-03-04 Hydrostatische dosierrolle mit anzeige der verschiebung durch steuerung von hydrostatischen traegern zu feiner dosierung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88103375A EP0330720B1 (fr) 1988-03-04 1988-03-04 Rouleau hydrostatique de dosage précis avec visualisation de déplacement en commandant des supports hydrostatiques

Publications (2)

Publication Number Publication Date
EP0330720A1 true EP0330720A1 (fr) 1989-09-06
EP0330720B1 EP0330720B1 (fr) 1992-09-09

Family

ID=8198774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88103375A Expired - Lifetime EP0330720B1 (fr) 1988-03-04 1988-03-04 Rouleau hydrostatique de dosage précis avec visualisation de déplacement en commandant des supports hydrostatiques

Country Status (3)

Country Link
EP (1) EP0330720B1 (fr)
AT (1) ATE80350T1 (fr)
DE (1) DE3874520T2 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1154188A (fr) * 1956-06-13 1958-04-03 British Cellophane Ltd Perfectionnements à la fabrication de pellicules imperméables
US3382130A (en) * 1964-05-15 1968-05-07 Fr D Etiquetage Virey & Garnie Device for preventing the fouling of labelling machines by the label glue
FR2429156A1 (fr) * 1978-06-19 1980-01-18 Jagenberg Werke Ag Cylindre encolleur dans une machine a etiqueter
US4193644A (en) * 1977-04-07 1980-03-18 Citizen Watch Co., Ltd. Servo control system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1154188A (fr) * 1956-06-13 1958-04-03 British Cellophane Ltd Perfectionnements à la fabrication de pellicules imperméables
US3382130A (en) * 1964-05-15 1968-05-07 Fr D Etiquetage Virey & Garnie Device for preventing the fouling of labelling machines by the label glue
US4193644A (en) * 1977-04-07 1980-03-18 Citizen Watch Co., Ltd. Servo control system
FR2429156A1 (fr) * 1978-06-19 1980-01-18 Jagenberg Werke Ag Cylindre encolleur dans une machine a etiqueter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RESEARCH DISCLOSURE, section 243, no. 27, 10th July 1984, AN 84-205356 (33), pn, disclosure no. 243027, Derwent Publications, Ltd, London, GB; "Rolling mill roll - consists of roll supported by stationary beam through sequence of hydrostatic pacs" *

Also Published As

Publication number Publication date
DE3874520D1 (fr) 1992-10-15
ATE80350T1 (de) 1992-09-15
EP0330720B1 (fr) 1992-09-09
DE3874520T2 (de) 1993-03-25

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