EP1040920A1 - Siebdruckmaschine zum Dekorieren - Google Patents

Siebdruckmaschine zum Dekorieren Download PDF

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Publication number
EP1040920A1
EP1040920A1 EP99830145A EP99830145A EP1040920A1 EP 1040920 A1 EP1040920 A1 EP 1040920A1 EP 99830145 A EP99830145 A EP 99830145A EP 99830145 A EP99830145 A EP 99830145A EP 1040920 A1 EP1040920 A1 EP 1040920A1
Authority
EP
European Patent Office
Prior art keywords
wheels
screen
shafts
segment
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.)
Withdrawn
Application number
EP99830145A
Other languages
English (en)
French (fr)
Inventor
Sandro Cottafava
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.)
Gomes Technology SpA
Original Assignee
Gomes Technology 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 Gomes Technology SpA filed Critical Gomes Technology SpA
Priority to EP99830145A priority Critical patent/EP1040920A1/de
Publication of EP1040920A1 publication Critical patent/EP1040920A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0831—Machines for printing webs
    • B41F15/0836—Machines for printing webs by means of cylindrical screens or screens in the form of endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0809—Machines for printing sheets with cylindrical or belt-like screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/10—Screen printing machines characterised by their constructional features
    • B41P2215/12—Screens

Definitions

  • the machine is usefully applied in decorating ceramic tiles in production lines.
  • the prior art has for a long time taught silk screen machines which use a silk screen in the form of a thin rotary circular cylinder which is brought into contact with underlying tiles being transferred on a conveyor with the same peripheral speed as the cylinder in such a way that there is no dragging between the two.
  • Italian patent 01287622 describes a silk-screen decorating machine which comprises a flexible band-type silk screen, ring-wound and stretched between two parallel-axis rotors.
  • the screen is drawn by at least one of these rotors, which are arranged projectingly above a mobile plane for tile conveying and are constituted by couples of wheels, on which the silk screen partially winds.
  • the two coaxial wheels of each couple are solidly mounted on a shaft; the first wheel on a first segment of the shaft and the second on a second segment of the shaft, which second segment can be moved in an axial direction with respect to the first segment, while being solid in rotation with said first segment.
  • a serious drawback of the above-described invention is connected with the fact that the necessary stretching of the screen in a longitudinal direction produces a considerable flexion of the shafts supporting the screen on which the screen winds.
  • a further advantage of the invention is that it gives rise to a structure which in no way limits the mounting, dismounting, substitution and regulation operations on the screen.
  • 1 denotes a belt-type silk screen, flexible and ring-wound and stretched between two parallel-axis and horizontal rotors 2 and 3.
  • the two parallel-axis rotors 2 and 3 are projectingly arranged above a mobile plane 21 for conveying tiles 22, in such a way that the lower branch of the screen stretched between the two rotors is more or less horizontal and located at a short distance from the mobile plane 21.
  • the two rotors 2 and 3 are constituted by pairs of wheels 4 and 5, around which the screen 1 is partially wound.
  • the pairs of wheels 4 and 5 are mounted on respective shafts 6 and 7.
  • Each of the shafts 6 and 7 is constituted by a first segment 8 and a second segment 9 which are coaxial, solid in rotation and reciprocally axially displaceable.
  • a wheel 4 is solidly mounted on each first segment 8, while another wheel 5 is mounted on each second segment 9.
  • the first segment 8 of the shaft 6 is rotatably supported on a frame 19 of the machine and is connected through a normal mechanical gear transmission 23 to a motor 24 which on command draws the shaft 6 in rotation.
  • the rotor 3 and especially the first segment 8 of the shaft 7 are mounted on a support 18 which is constrained to the frame 19 translatably in a perpendicular direction to the rotation axis of the shaft 7 itself.
  • a pneumatic cylinder 20 on command translates the support 18 in two directions with respect to the frame 19.
  • the coupling of the screen 1 on the pairs of wheels 4 and 5 is realised in such a way as to enable the screen to be drawn without any sliding and also for the wheels to grip on the screen itself so as to realise a good transversal stretching.
  • the silk screen I exhibits, solidly constrained to its edges, two ring-wound longitudinal elements, or belts 11, which are elastically flexible and mechanically sturdy and which are provided with two transversal coggings 12, predisposed to enable enmeshing with corresponding transversal cogs provided on the wheels 4 and 5.
  • the belts 1 also bear at least one trapezoid-section longitudinal rib 13, predisposed to couple in a corresponding hollow seating or gullet 28 afforded on each of the wheels 4 and 5.
  • the coupling of the longitudinal ribs 13 with the gullets 28 of the wheels 4 and 5 is mainly for transversally anchoring the lateral edges of the screen 1 to the wheels 4 and 5 so as to enable the screen 1 to be transversally stretched simply by coaxially distancing wheel 5 from wheel 4 in each of the wheel pairs 4, 5 mounted respectively on shafts 6 and 7.
  • the axial displacement of wheels 5 with respect to wheels 4 is obtained by axially sliding the second segments 9 (by means of pneumatic cylinders 14) with respect to the first segments 8.
  • An end of a con rod 16 is hinged to each support 10.
  • Both of the con rods 16 have other ends which are symmetrically hinged to a single central element 15 by means of pivots 25 so as to give rise to a mechanism, denoted in its entirety by 26, which connects the free ends of the two shafts 6 and 7.
  • the essential characteristic of the mechanism 26 consists in the proportioning and relative arrangement of the various elements so that the sum of the lengths of the two con rods 16 with the distance between the axes of the two pivots 25 is definitely greater than the distance between the axes of the two shafts 6 and 7 in an undeformed configuration, meaning a non-stressed configuration.
  • the mechanism 26 can be used to locate the two free ends of the shafts 6 and 7 at a predetermined distance one from the other.
  • the two free ends can be positioned so that the inter-axes between the shafts 6 and 7, measurable at the keying section portions of the wheels 4 and 5, are equal.
  • the mechanism 26 can be activated to the desired extent simply by producing a displacement of the central element 15 with respect to the shafts 6 and 7 which exhibits at least one component which is parallel to the axes of the shafts themselves.
  • the entity of the transversal displacement is geometrically determined according to the desired transversal displacement of the two free ends of the shafts 6 and 7.
  • the desired transversal displacement of the two free ends of the shafts 6 and 7 is obtained by producing a predetermined axial translation by means of the pneumatic cylinders 14 of the two second segments 9 with respect to the relative segments 8 after the central element 15 has interacted with an external fixed striker 17 which in the example is solidly connected to the frame of the machine 19.
  • the movement of the second segments 9 also achieves the lateral tensioning of the screen 1.
  • the mechanism 26 can be made differently, for example with the two con rods 16 exhibiting their first ends reciprocally hinged with no interpositioning of the central element 15. Obviously, in this case it would be the sum of the lengths of the two con rods 16 which would have to satisfy the condition of being greater than the distance between the axes of the two shafts 6 and 7 in the undeformed configuration (i.e. with no stress).
  • the striker element 17 might not be fixed to the frame 19 but rather associated to a device (for example a screw-type device) which allows a controlled displacement in a parallel direction to that of the axes of the shafts 6 and 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
EP99830145A 1999-03-17 1999-03-17 Siebdruckmaschine zum Dekorieren Withdrawn EP1040920A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99830145A EP1040920A1 (de) 1999-03-17 1999-03-17 Siebdruckmaschine zum Dekorieren

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99830145A EP1040920A1 (de) 1999-03-17 1999-03-17 Siebdruckmaschine zum Dekorieren

Publications (1)

Publication Number Publication Date
EP1040920A1 true EP1040920A1 (de) 2000-10-04

Family

ID=8243312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99830145A Withdrawn EP1040920A1 (de) 1999-03-17 1999-03-17 Siebdruckmaschine zum Dekorieren

Country Status (1)

Country Link
EP (1) EP1040920A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1266757A2 (de) * 2001-05-29 2002-12-18 Tecno - Europa S.R.L. Vorrichtung zur Dekoration von keramischen Gegenständen
WO2004069559A2 (en) * 2003-02-03 2004-08-19 Comital S.P.A. Methods and apparatus for decorating items
EP1825978A2 (de) 2006-02-23 2007-08-29 Tecno-Europa S.r.l. Zylindrische Dekoriervorrichtung
CN101944574A (zh) * 2010-05-17 2011-01-12 张天任 一种蓄电池生产流水线丝网印刷装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102469A (en) * 1959-07-20 1963-09-03 Maurice H Sherman Screen printing apparatus
US3598049A (en) * 1968-02-08 1971-08-10 Vitos Etablissements Vitoux So Endless band stenciling apparatus
US3835773A (en) * 1972-04-26 1974-09-17 M Vasilantone Printing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102469A (en) * 1959-07-20 1963-09-03 Maurice H Sherman Screen printing apparatus
US3598049A (en) * 1968-02-08 1971-08-10 Vitos Etablissements Vitoux So Endless band stenciling apparatus
US3835773A (en) * 1972-04-26 1974-09-17 M Vasilantone Printing apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1266757A2 (de) * 2001-05-29 2002-12-18 Tecno - Europa S.R.L. Vorrichtung zur Dekoration von keramischen Gegenständen
EP1266757A3 (de) * 2001-05-29 2003-02-19 Tecno - Europa S.R.L. Vorrichtung zur Dekoration von keramischen Gegenständen
WO2004069559A2 (en) * 2003-02-03 2004-08-19 Comital S.P.A. Methods and apparatus for decorating items
WO2004069559A3 (en) * 2003-02-03 2005-04-14 Comital S P A Methods and apparatus for decorating items
EP1825978A2 (de) 2006-02-23 2007-08-29 Tecno-Europa S.r.l. Zylindrische Dekoriervorrichtung
EP1825978A3 (de) * 2006-02-23 2010-09-01 Tecno-Europa S.r.l. Zylindrische Dekoriervorrichtung
CN101944574A (zh) * 2010-05-17 2011-01-12 张天任 一种蓄电池生产流水线丝网印刷装置

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