EP0328304A1 - Verfahren und Vorrichtung zum Überziehen von Maschendraht - Google Patents

Verfahren und Vorrichtung zum Überziehen von Maschendraht Download PDF

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Publication number
EP0328304A1
EP0328304A1 EP89301022A EP89301022A EP0328304A1 EP 0328304 A1 EP0328304 A1 EP 0328304A1 EP 89301022 A EP89301022 A EP 89301022A EP 89301022 A EP89301022 A EP 89301022A EP 0328304 A1 EP0328304 A1 EP 0328304A1
Authority
EP
European Patent Office
Prior art keywords
coating
wire mesh
plant apparatus
continuous
powder
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Withdrawn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
EP89301022A
Other languages
English (en)
French (fr)
Inventor
Peter Alan White
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.)
Tinsley Wire Sheffield Ltd
Original Assignee
Tinsley Wire Sheffield 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 Tinsley Wire Sheffield Ltd filed Critical Tinsley Wire Sheffield Ltd
Publication of EP0328304A1 publication Critical patent/EP0328304A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
    • C25D13/16—Wires; Strips; Foils

Definitions

  • This invention relates to a process and apparatus for applying a protective coating to wire mesh.
  • the present invention aims to overcome this disadvantage by providing an anti-corrosion layer on the wire mesh prior to applying a further layer of coating material in order to give both excellent penetration into the weld area and high adhesion.
  • a process for applying a protective coating to wire mesh comprising pretreating the wire mesh with a conversion coating, immersing the coated wire mesh in a bath of anti-corrosion primer coating which is suspended in water and charged, applying a powder coating exhibiting polar properties or characteristics and curing this over the primer coating.
  • the conversion coating is a chromate or phosphate to enhance adhesion and wetting by the anti-­corrosion primer coating.
  • the anti-corrosion primer coating is an electrophoretic deposited waterborne resin selected from one of the following: alkyds, acrylics, epoxide, esters, phenolics and polyesters.
  • the powder coating exhibiting polar properties or characteristics is preferably a low moisture-permeable weather-resistant coating that will crosslink and bond with the anti-corrosion primer coating when cured.
  • a continuous plant apparatus for applying a protective coating to wire mesh using the process as set forth in the four preceding paragraphs, comprising means for transporting wire mesh into a pretreatment section including a plurality of baths for containing material to apply a conversion coating to the wire mesh, an electrocoating section including a plurality of baths for containing an anti-corrosion primer coating and then passing the pretreated wire mesh through a plant apparatus having means to apply a powder coating exhibiting polar properties or characteristics and means to cure this coating over the wire mesh pretreated with the conversion and primer coatings.
  • the invention also extends to a wire mesh panel or a continuous length of wire mesh having a protective coating applied using the process according to the present invention.
  • the wire mesh used in the process is a steel based mesh for eventual use as fencing, reinforcement or other like products and is produced by weaving or by welding.
  • Existing products of this kind are currently protected from the environment by either galvanising or powder coating or by a combination of both.
  • the woven mesh is produced by applying an anti-­corrosion coating to the steel wire which is then woven and thereby a complete coating is applied to the mesh product.
  • the steel wire used in the production of the mesh can either be galvanised or coated with a powder or both.
  • the resulting three layer system meets the above test criteria and gives a finish which exhibits no rust after a simulated 10 to 20 years life cycle.
  • Figures 1 and 2 illustrate a continuous pretreatment plant comprising a loading station 1 for wire mesh in either roll form 2 or panels 3.
  • the wire mesh is transported by a mechanical handling system 4 and dipped into a series of baths. Five rolls measuring up to 2.4 metres wide and 750mm diameter (25 or 50 metres long) can be accommodated in each bath at the same time.
  • the panels 3 will normally measure 5 by 3.3 metres.
  • the transport is controlled from an electric control console 5 by an operator 6 standing on a platform 7.
  • the wire mesh is immersed in succession in a pretreatment section to apply a conversion coating comprising a bath 8 of alkali cleaner for five minutes at 70°C; two baths 9 and 10 of cold water rinse for periods of one minute at ambient temperature; a bath 11 of zinc phosphate for five minutes at 60°C; a bath 12 of cold water rinse for one minute at ambient temperature; a bath 13 containing chromic seal for one minute at ambient temperature; and a bath 14 containing a demineralised water rinse for one minute at ambient temperature.
  • the pretreated wire mesh is then passed through an electrocoating section 15 to apply an anti-­corrosive primer coating for a period of two minutes at 21°C and then to a post paint rinse section, comprising two baths 16 and 17 of ultrafiltrate rinse for periods of fifteen seconds at ambient temperature and finally to a bath 18 of demineralised water rinse for fifteen seconds at ambient temperature.
  • the wire mesh is then conveyed by an overhead conveyor 19 of the mechanical handling system 4 on a continuous path through a paint stoving oven 20 for a period of 25 minutes at 200°C.
  • the pretreated wire mesh is then transported back to an unloading station 21 at the beginning of the continuous plant conveyor.
  • the overhead conveyor 19 can carry 7.2 loads per hour.
  • an effluent treatment plant 22 Located at the rear of the operator platform 7 is an effluent treatment plant 22.
  • the pretreated wire mesh rolls or panels from the apparatus of Figures 1 and 2 are then coated with a powder coating exhibiting polar properties or characteristics in a further continuous coating plant illustrated in Figures 3 and 4.
  • the pretreated wire mesh rolls 2 are mounted on a roll supporting car 23 driven by an A.C. geared motor 24 to a snubber roll 25 which pays out wire mesh under the control of a pneumatic disc brake 26.
  • the wire mesh passes through a circular saw 27 where it may be cut to lengths as required, and through a joining press 28 to an accumulator 29, driven by a D.C. geared motor 30 and an accumulator drive A.C. torque control geared motor 31.
  • the continuous length of wire mesh is transported to a bridle 32 driven by a D.C. geared motor 33 and is treated in a spray booth 34 by applying a powder coating exhibiting polar properties or characteristics over the conversion coating and the anti-corrosion primer coating.
  • a powder coating exhibiting polar properties or characteristics over the conversion coating and the anti-corrosion primer coating.
  • the pretreated rolls 2 of wire mesh may be dipped into a fluidised bed containing the said powder coating.
  • This powder coating is preferably a low moisture-permeable weather-­resistant coating that will crosslink and bond with the anti-corrosion primer coating when cured.
  • the wire mesh with the protective coating is then passed through a bridle 37 driven by a D.C. geared motor 38 and into an exit accumulator 39 driven by a D.C. geared motor 40 and an accumulator drive A.C. torque controlled geared motor 41.
  • the wire mesh passes through a second circular saw 42 and onto a roll mandrel 43 driven by an A.C. geared motor 44.
  • the continuous plant illustrated in Figures 3 and 4 can also be used to apply a protective coating to panels 3 of wire mesh which have been pretreated in the plant of Figures 1 and 2, which panels are transported through the above described processing plant by an overhead monorail system 46.
  • the panels 3 are carried from the pretreatment plant and stacked at a location 47, for uncoated panels. These panels are then carried by the overhead monorail system 46 through the spray booth 34 or the fluidised bed and are unstacked at a location 48 for the coated and cured panels.
  • the speed of throughput of the panels or continuous sheets of wire mesh is normally 3 metres per minute.
  • the curing of the powder coating may be by infra-red or other suitable means, and normally takes one minute.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP89301022A 1988-02-04 1989-02-02 Verfahren und Vorrichtung zum Überziehen von Maschendraht Withdrawn EP0328304A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8802499 1988-02-04
GB888802499A GB8802499D0 (en) 1988-02-04 1988-02-04 Process & apparatus for coating wire mesh

Publications (1)

Publication Number Publication Date
EP0328304A1 true EP0328304A1 (de) 1989-08-16

Family

ID=10631059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89301022A Withdrawn EP0328304A1 (de) 1988-02-04 1989-02-02 Verfahren und Vorrichtung zum Überziehen von Maschendraht

Country Status (2)

Country Link
EP (1) EP0328304A1 (de)
GB (1) GB8802499D0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366941B1 (de) * 1988-09-29 1996-01-31 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Verfahren zur elektrophoretischen Tauchlackierung von chromatierbaren Metalloberflächen
AU773193B2 (en) * 1999-09-13 2004-05-20 Rain Harvesting Pty Ltd Improvements in or relating to a method and apparatus for applying a coating to a mesh material
CN107723698A (zh) * 2017-10-23 2018-02-23 贝卡尔特（新余）金属制品有限公司 一种钢丝磷化防缝隙腐蚀的方法
CN111101126A (zh) * 2020-01-17 2020-05-05 桐庐蓝剑机械制造有限公司 一种环保型皮膜机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2232067B2 (de) * 1971-07-06 1980-05-22 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur Vorbereitung von Metalloberflächen für die elektrophoretische Tauchlackierung
GB2194249A (en) * 1986-07-31 1988-03-02 Nippon Steel Corp A multicoated steel sheet susceptible to cationic electrodeposition coating

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2232067B2 (de) * 1971-07-06 1980-05-22 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur Vorbereitung von Metalloberflächen für die elektrophoretische Tauchlackierung
GB2194249A (en) * 1986-07-31 1988-03-02 Nippon Steel Corp A multicoated steel sheet susceptible to cationic electrodeposition coating

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Derwent Accession No. 80-52 368, Questel Telesystemes (WPIL) Derwent Publications Ltd., London * Abstract * & JP-A-55-076 507 (Mitsubishi Electric Corp.) *
Derwent Accession No. 82-82 897, Questel Telesystemes (WPIL) Derwent Publications Ltd., London * Abstract * & JP-A-57-137 364 (Mitsui Toatsu Chem Inc.) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366941B1 (de) * 1988-09-29 1996-01-31 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Verfahren zur elektrophoretischen Tauchlackierung von chromatierbaren Metalloberflächen
AU773193B2 (en) * 1999-09-13 2004-05-20 Rain Harvesting Pty Ltd Improvements in or relating to a method and apparatus for applying a coating to a mesh material
CN107723698A (zh) * 2017-10-23 2018-02-23 贝卡尔特（新余）金属制品有限公司 一种钢丝磷化防缝隙腐蚀的方法
CN111101126A (zh) * 2020-01-17 2020-05-05 桐庐蓝剑机械制造有限公司 一种环保型皮膜机

Also Published As

Publication number Publication date
GB8802499D0 (en) 1988-03-02

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