EP0277265A2 - Druckmechanismus mit Rakel - Google Patents

Druckmechanismus mit Rakel Download PDF

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Publication number
EP0277265A2
EP0277265A2 EP87107199A EP87107199A EP0277265A2 EP 0277265 A2 EP0277265 A2 EP 0277265A2 EP 87107199 A EP87107199 A EP 87107199A EP 87107199 A EP87107199 A EP 87107199A EP 0277265 A2 EP0277265 A2 EP 0277265A2
Authority
EP
European Patent Office
Prior art keywords
squeegee
doctor
pressing member
substrate
squeegee doctor
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Withdrawn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
EP87107199A
Other languages
English (en)
French (fr)
Other versions
EP0277265A3 (de
Inventor
Shiro Ichinose
Kunio Katsuuma
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.)
Toshin Kogyo Co Ltd
Original Assignee
Toshin Kogyo Co Ltd
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 Toshin Kogyo Co Ltd filed Critical Toshin Kogyo Co Ltd
Publication of EP0277265A2 publication Critical patent/EP0277265A2/de
Publication of EP0277265A3 publication Critical patent/EP0277265A3/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Withdrawn legal-status Critical Current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
    • B41F15/14—Details
    • B41F15/44—Squeegees or doctors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/40—Inking units
    • B41F15/42—Inking units comprising squeegees or doctors
    • B41F15/426—Inking units comprising squeegees or doctors the squeegees or doctors being magnetically attracted

Definitions

  • the present invention relates to a printing mechanism. More particularly, the present invention relates to a squeegee doctor printing or coating mechanism, according to which the entire surface of a substrate to be printed can be uniformly printed very easily with a good reproducibility.
  • a squeegee doctor member composed of an elastic material such as a rubber or thin metal sheet
  • the squeegee doctor is pressed to a substrate to be printed by applying a pressure to both the ends of a supporting member having the squeegee doctor attached thereto and a printing ink is coated on the substrate
  • a squeegee roller composed of a magnetic material
  • the squeegee roller is attracted by an electromagnet arranged on the lower side of a substrate to press the squeegee roller to the substrate and a printing ink is coated on the substrate.
  • the means (1) using an elastic squeegee doctor member is advantageous in that (A) the coating amount is small and fine printing is possible and (B) a fine print having a sharp contour can be obtained, but the means (1) is defective in the following points.
  • the means (2) using a squeegee roller composed of a magnetic material is advantageous in that (A ⁇ ) the pressing force of the squeegee roller can be digitally adjusted very easily by controlling the size of the roller and the voltage supplied to the electromagnet, (B ⁇ ) since the pressing force acts uniformly on the entire width of the substrate, an excellent coating accuracy or level dyeing can be obtained and (C ⁇ ) since there is no risk of bending of the supporting member, the weight can be reduced.
  • the means (2) is defective in the following points.
  • Another object of the present invention is to provide a printing or coating mechanism which can form high-quality prints on various substrates by using coating liquids differing in the permeation degree in a broad range in coating amounts ranging from a very small amount to a large amount.
  • Still another object of the present invention is to provide a printing or coating mechanism which can be easily operated by any person without a troublesome adjusting operation or a high skill.
  • a further object of the present invention is to provide a printing or coating mechanism in which the weight of the squeegee-supporting member is much reduced, a response characteristic is improved, a delicate operation is easily performed and the operation adaptability is improved.
  • a squeegee doctor printing or coating mechanism which comprises a squeegee doctor arranged on the upper side of a substrate to be printed or coated, a pressing member formed of a magnetic material and mounted on the squeegee doctor, and an electromagnet arranged on the lower side of the substrate at a position confronting the squeegee doctor, wherein the squeegee doctor is pressed to the substrate by the pressing member when the pressing member is attracted by the electromagnet.
  • the printing or coating mechanism of the present invention exerts the following prominent effects.
  • printing is defined to mean not only direct coating of a coating liquid on a substrate but also printing of a coating liquid on a substrate through a flat screen or rotary screen.
  • a substrate 1 is spread on the top face of an endless belt 2 and is moved to the left.
  • a squeegee doctor-supporting member 3 is arranged so that the axial direction of the member 3 is orthogonal to the direction of advance of the substrate 1.
  • a squeegee doctor-attaching member 4 is fixed to the lower side of the supporting member 3, and a squeegee doctor 5 is fixed to the top end portion of the attaching member 4 so that an acute angle is formed between the squeegee doctor 5 and the substrate 1 with respect to a direction reverse to the direction of advance of the substrate 1.
  • Each of the supporting member 3, the attaching member 4 and the squeegee doctor 3 has a length which is equal to or larger than the width of the substrate 1.
  • the supporting member 3 is arranged so that the supporting member 3 can conduct a circular movement with the orthogonal line between the vertical plane passing through the central axis of the supporting member 3 and the surface of the substrate being as the central axis.
  • a pressing member 6 composed of a magnetic material is disposed on the squeegee doctor 5 and is prevented from departing from the position on the squeegee doctor 5 by an anchoring member 7 fixed to the attaching member 4.
  • the pressing member 6 has a length equal to or larger than the width of the substrate 1, but the anchoring member 7 need not extend along the entire width of the substrate, so far as the pressing member 6 is prevented from departing from the position on the squeegee doctor 5.
  • the pressing member 6 does not move in the width direction of the substrate but is movable in the region surrounded by the attaching member 4, the squeegee doctor 5 and the anchoring member 7.
  • An electromagnet 8 is disposed on the lower side of the endless belt 2 at the position confronting the squeegee doctor 5 and pressing member 6.
  • the pressing member 6 When the electromagnet 8 is energized by an electric current, the pressing member 6 is attracted to the electromagnet 8 and a pressing force is applied to the squeegee doctor 5 by this attracting force and the weight of the pressing member 6.
  • a coating liquid 9 is supplied between the squeegee doctor 5 and the substrate 1 below the squeegee doctor 5 and is coated on the substrate 1 by the squeegee doctor 5.
  • the squeegee doctor 5 is formed of a thin sheet of a metal such as a stainless steel or phosphor broze, a plate of a resin such as a thermoplastic resin, a thermosetting resin or a thermoplastic or thermosetting resin reinforced with a glass fiber or the like, or a plate of a rubber.
  • a resin such as a thermoplastic resin, a thermosetting resin or a thermoplastic or thermosetting resin reinforced with a glass fiber or the like, or a plate of a rubber.
  • the thermoplastic resin there can be mentioned a vinyl chloride resin, high-density polyethylene, crystalline polypropylene, a polyamide, a polyacetal and a polycarbonate.
  • thermosetting resin there can be mentioned an epoxy resin, a melamine resin, a urea resin and an unsaturated polyester resin.
  • the thickness of the thin metal sheet be 0.1 to 1.0 mm and the thickness of the resin plate be 0.2 to 3.0 mm.
  • a laminate formed by piling or bonding the thin metal sheet and the resin plate can be used as the squeegee doctor 5.
  • the pressing member 6 is a rod-shaped body formed of a magnetic material.
  • the pressing member 6 may be formed of a magnetic material and a non-magnetic material, and an iron rod having the surface plated or coated with a resin is advantageously used as the pressing member 6.
  • the sectional shape of the pressing member 6 may be a circular shape as shown in Fig. 1 or an ellipsoidal, polygonal or other optional shape.
  • the size and weight of the pressing member 6 may be optionally selected, so far as the above-mentioned function is exerted. However, in case of a pressing member having a circular section, it is generally preferred that the diameter be about 5 to about 50 mm.
  • a known supporting member can be used as the supporting member 3.
  • the supporting member since it is necessary to press the squeegee doctor by applying a pressure to both the end portions of the supporting member, the supporting member should be so tough that the supporting member can resist a reaction force from the squeegee doctor and deformation is prevented.
  • the supporting member may have a lower strength and a lighter weight than the known supporting member.
  • the shapes of the attaching member 4 and anchoring member 7 are not particularly critical, so far as the above-mentioned functions are exerted.
  • the anchoring member 7 may be fixed to the supporting member 3.
  • a known electromagnet can be used as the electromagnet 8, and the attracting force to the pressing member 6 can be adjusted by adjusting the voltage to be applied to the electromagnet 8, whereby the pressing force to the squeegee doctor 5 can be adjusted.
  • the pressing force to the squeegee doctor 5 should be appropriately changed according to the properties of the substrate 1 and coating liquid 9, the amount of the coating liquid coated on the substrate 1 and the moving speed of the substrate 1. As pointed out hereinbefore, the pressing force to the squeegee doctor 5 is given by the sum of the weight of the pressing member 6 and the force of attracting the pressing member 6 to the electromagnet 8.
  • the necessary minimum pressing force of the pressing force to the squeegee doctor 5 is given by the weight of the pressing member 6 and a variable portion of the pressing force to the squeegee doctor 5 is given by the attracting force of the electromagnet 8. Since the attracting force to the pressing member 6 is changed according to the kind and weight of the pressing member 6, the distance from the electromagnet 8 and the size of the electromagnet 8, the range of the voltage to be applied to the electromagnet 8 cannot be specified, but it is generally preferred that the voltage be selected so that an attracting force of 10 to 3000 g/cm is given to the pressing member 6.
  • the above-mentioned factors having influences on the attracting force be adjusted so that the attracting force within the above-mentioned range can be given to the pressing member 6 while the voltage to be applied to the electromagnet 8 is 10 to 150 volts.
  • the voltage applied to the electromagnet 8 can be digitally displayed.
  • the voltage may be adjusted steplessly and continuously, or there may be adopted a method in which a plurality of voltages are set in advance and an appropriate voltage is selected by switching.
  • the attaching member 4 and squeegee doctor 5 be arranged so that the top end of the squeegee doctor 5 is located just below the central axis of the suppporting member 3 with respect to the vertical direction. If this arrangement is adopted, by the circular movement with the orthogonal line between the vertical plane passing through the central axis of the supporting member 3 and the surface of the substrate being as the center axis, the angle ⁇ formed between the squeegee doctor 5 and the substrate 1 on the upstream side of the squeegee doctor 5 can be changed while the top end of the squeegee doctor 5 is kept in contact with the surface of the substrate 1. The amount of the coating liquid coated on the substrate 1 can be adjusted by thus changing the above-mentioned angle ⁇ .
  • the supporting member 3 (the squeegee doctor 5 supported thereby) and the electromagnet 8 may be arranged so that they can be moved to the left and right while the positional relation between them is maintained.
  • the endless belt 2 may be omitted.
  • a rotary screen 10 is arranged on the upper surface of a substrate 1 spread on the upper surface of the endless belt 2, and a supporting member 3, an attaching member 4, a squeegee doctor 5, a pressing member 6 and an anchoring member 7 are arranged within the rotary screen 10.
  • An electromagnet 8 is disposed below the endless belt 2.
  • the structures, materials and functions of the supporting member 3, attaching member 4, squeegee doctor 5, pressing member 6, anchoring member 7 and electromagnet 8 are the same as described hereinbefore with reference to the embodiment shown in Fig. 1.
  • a coating liquid 9 is supplied between the squeegee doctor 5 and the rotary screen 10 below the squeegee doctor 5, and the coating liquid 9 is printed on the substrate 1 through the rotary screen 10 by the squeegee doctor 5. Printing through the rotary screen is performed according to known procedures.
  • a flat screen can be used instead of the rotary screen.
  • the supporting member 3 (the squeegee doctor 5 supported thereby), the rotary screen and the electromagnet 8 may be arranged so that they can be moved to the left and right or in the width direction of the substrate 1 in Fig. 2 while the positional relation among them is maintained.
  • known means such as a screen frame should be adopted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
  • Coating Apparatus (AREA)
EP87107199A 1987-01-31 1987-05-18 Druckmechanismus mit Rakel Withdrawn EP0277265A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1987012220U JPS63121537U (de) 1987-01-31 1987-01-31
JP12220/87U 1987-01-31

Publications (2)

Publication Number Publication Date
EP0277265A2 true EP0277265A2 (de) 1988-08-10
EP0277265A3 EP0277265A3 (de) 1990-02-07

Family

ID=11799296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107199A Withdrawn EP0277265A3 (de) 1987-01-31 1987-05-18 Druckmechanismus mit Rakel

Country Status (3)

Country Link
EP (1) EP0277265A3 (de)
JP (1) JPS63121537U (de)
KR (1) KR880013699A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990007387A3 (de) * 1989-01-09 1990-11-01 Johannes Zimmer Anordnung zum auftragen von substanzen auf bahnförmiges material
EP0769375A1 (de) * 1995-10-11 1997-04-23 Stork MBK GmbH Rotationssiebdruckmaschine
EP0842772A4 (de) * 1995-07-12 1999-04-21 Matsushita Electronics Corp Vorrichtung und verfahren zum drucken
CN120094795A (zh) * 2025-05-12 2025-06-06 福建凤竹纺织科技股份有限公司 一种防水透湿面料覆膜设备及其工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4987534B2 (ja) * 2006-03-28 2012-07-25 ヤマハ発動機株式会社 スクリーン印刷装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT306750B (de) * 1968-05-07 1973-04-25 Zimmer J Klagenfurter Maschine Druckwerk für Schablonendruckmaschinen
IT980974B (it) * 1971-11-08 1974-10-10 Gall J Dispositivo di raschiatura elet tronica previsto in particolare in una macchina da stampa con mascherina sagomata e intelaia tura piatta
US3992990A (en) * 1972-08-01 1976-11-23 Peter Zimmer Dyestuff applicator for screen printer
AT321239B (de) * 1973-10-25 1975-03-25 Zimmer Johannes Rakelanordnung
AT360481B (de) * 1976-09-14 1981-01-12 Zimmer Johannes Streichrakel
AT363901B (de) * 1976-09-14 1981-09-10 Zimmer Johannes Rakelanordnung
JPS5519509A (en) * 1978-07-28 1980-02-12 Ichiro Noguchi Cylindrical stencil duplicating machine
IT1129083B (it) * 1979-04-30 1986-06-04 Johannes Zimmer Dispositivo a rulli con forza di pressione prodotta magneticamente per apparecchi di stampa verniciatura impregnazione spremitura e simili
JPS59222355A (ja) * 1982-01-05 1984-12-14 ヨハネス・チンメル 平らなステンシルのためのスクイ−ジ装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990007387A3 (de) * 1989-01-09 1990-11-01 Johannes Zimmer Anordnung zum auftragen von substanzen auf bahnförmiges material
EP0842772A4 (de) * 1995-07-12 1999-04-21 Matsushita Electronics Corp Vorrichtung und verfahren zum drucken
US6135024A (en) * 1995-07-12 2000-10-24 Matsushita Electric Industrial Co., Ltd. Screen printing method and printing apparatus
US6453811B1 (en) 1995-07-12 2002-09-24 Matsushita Electric Industrial Co., Ltd. Printing method and printing apparatus
EP0769375A1 (de) * 1995-10-11 1997-04-23 Stork MBK GmbH Rotationssiebdruckmaschine
CN120094795A (zh) * 2025-05-12 2025-06-06 福建凤竹纺织科技股份有限公司 一种防水透湿面料覆膜设备及其工艺

Also Published As

Publication number Publication date
KR880013699A (ko) 1988-12-21
JPS63121537U (de) 1988-08-08
EP0277265A3 (de) 1990-02-07

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Inventor name: ICHINOSE, SHIRO

Inventor name: KATSUUMA, KUNIO