US3557938A - Drying conveyor - Google Patents

Drying conveyor Download PDF

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Publication number
US3557938A
US3557938A US723819A US3557938DA US3557938A US 3557938 A US3557938 A US 3557938A US 723819 A US723819 A US 723819A US 3557938D A US3557938D A US 3557938DA US 3557938 A US3557938 A US 3557938A
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United States
Prior art keywords
objects
conveyor
carrying
plate
drying conveyor
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Expired - Lifetime
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US723819A
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English (en)
Inventor
Egon Verner Christensen
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MAGNEMAG HAGOU AS
Original Assignee
H Nielsen and Son Maskinfabrik AS
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Assigned to MAGNEMAG HAGOU A/S, reassignment MAGNEMAG HAGOU A/S, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: H. NIELSEN & SON MASKINFABRIK A/S
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/003—Handling, e.g. loading or unloading arrangements for articles
    • F26B25/004—Handling, e.g. loading or unloading arrangements for articles in the shape of discrete sheets

Definitions

  • Drying conveyors of known art are generally mounted in such manner that the points of contact of the carrying means are flush with the plane determined by the advancement means of the painting plant to ensure a predetermined vertical distance from the spray guns in the painting plant to the object while this is being coated, in particular at the transfer of the object from painting plant to drying conveyor. Said vertical distance has to be observed rather carefully to ensure that the successive painting strokes do not overlap each other beyond what is necessary to avoid the formation of stripes on the surface of the object at the transition from one painting stroke to another.
  • the painting plant and the drying conveyor alike are to treat plate-shaped objects which are now of one width, now of a different width in the transverse direction of the conveying path, and since the carrying means, in order to avoid destruction of a coating already applied to such side of the plateshaped object as is facing the conveyor, may only support the object along its side edges, the carrying means of the known plants are designed in such manner that the points of contact of the carrying means cooperating with said edges of the object are located along a curve which in a vertical plane is located transversely of the direction of conveyance.
  • a drying conveyor in which the said drawback is wholly relieved
  • a drying conveyor according to the invention has the essential feature that the carrying frame is provided with lifting means which are displaceable and adjustable in vertical direction in relation to the support of the carrying frame in dependence of the width of the plate-shaped objects and their points of contact with the supporting edges of the carrying means.
  • the contact points of the carrying members may be adjusted manually, or preferably automatically, until, irrespective of the width of the object, they are flush with the horizontal plane which is determined by the advancement rolls of the painting plant, thus securing the fixed distance between the flat surfaces of the object and the spray nozzles.
  • each of the lifting members consists of a mechanical, hydraulic or pneumatic lifting cylinder with a dis placeable pressure rod.
  • the points of contact between the carrying members and a plate-shaped object which is moved with its longitudinal centerline located in the middle of the conveying path may be given such a height that the points of contact are flush with the plane of the advancement rolls of the painting plant, independently of the width of the object in the transverse direction of the conveying path.
  • At least one set of the lifting members is placed against each of the side girders of the carrying frame and symmetrically in relation to the longitudinal centerline ofthe conveyor.
  • the inlet side of the conveyor may be given the same lifting or, if desired, a greater or smaller lifting dependent upon the tendency of the object to curve, for example upwards, owing to any existing mechanical bias in the longitudinal direction of the object, or tendency to be bent downwards owing to gravity.
  • the plateshaped object is placed unsymmetrically in the transverse direction of the conveyor, so that one side edge of the object extends close to one side edge of the conveyor.
  • the lifting members are provided in such side of the carrying frame as is parallel with the direction of movement of the con veyor, the other side of the carrying frame being pivotally mounted in posts attached to the support.
  • the other side edge of the object may be lifted to the same height as the first side edge of the object, so. that any torsion of the object at its transfer from the painting plant to the drying conveyor is avoided.
  • the lifting members may be adjusted manually and individually, but for automatic adjustment of the lifting cylinders in one embodiment of the drying conveyor according to the invention at least one of the said cylinders is provided with a rack mounted parallelly with the direction of displacement of the pressure rod, one end part of the said rack being attached to the displaceable pressure rod of the lifting cylinder, while a gearwheel engaging the rack is rotatably mounted in the stationary part of the lifting cylinder and is mechanically coupled to an electric potentiometer which has a tap that may be rotated by the gearwheel and the position of which tap is an indication of the height to which the lifting cylinder is adjusted, the outer terminals of the said potentiometer and the said tap being connected to another potentiometer incorporated in an electric bridge circuit which has a source of current and a zero indicator, the said other potentiometer having a rotatable tap which in a manner known per se determines the height to which the lifting cylinder is adjusted, the zero indicator in the bridge circuit being connected to control means for the lifting cylinder.
  • the zero indicator of the bridge circuit such as a relay
  • a driving means such as a hydraulic pump the pressure of which displaces the lifting cylinder until the taps of the two potentiometers have attained the identical angular position, in which case the displacement of the lifting cylinder is stopped in the height fixed by the adjustment of the other potentiometer, the said height corresponding to the two side edge portions of a plate-shaped object being located in the identical horizontal plane.
  • At least one of the carrying members of the drying conveyor and preferably that carrying member which is leading in the direction of movement of the plate-shaped object, consists of at least one driven or freely rotating roller whose shaft is adjustable in a vertical plane at right angles to the direction of conveyance and is lying obliquely in such manner that the upper generatrix of the roller is located in the identical plane as one of the tangents to the supporting edge of the remaining carrying members.
  • the plate-shaped object is caught by a rolling support at the entrance of the drying conveyor; and the said rolling support will assist in equalizing any downward bending of the leading edge of the plate material.
  • FIG. 1 is a perspective view of a drying conveyor according to the invention.
  • FIG. 2 is the same, in a section taken at right angles to the direction of conveyance of the conveyor.
  • FIG. 3 shows a carrying member for the drying conveyor according to the invention in combination with plate objects of two different widths, placed symmetrically in the conveyor and viewed in their direction of movement,
  • FIG. 4 is the same in combination with a relatively narrow, plate-shaped object, placed unsymmetrically and with one of its side edges guided in fixed distance from one side edge of the conveyor path,
  • FIG. 5 shows schematically the drying conveyor according to the invention in connection with an automatic painting plant which is feeding treated, plate-shaped objects to the drying conveyor, viewed from the side and transversely of the direction of movement of the plate-shaped object,
  • FIG. 6 shows schematically the variation in the overlapping of successive painting strokes in case of a flat and a curved, plate-shaped object
  • FIG. 7 shows a lifting member of the drying conveyor according to the invention.
  • FIG. 8 a special embodiment of a carrying member for the drying conveyor.
  • FIGS. 1 and 2 illustrate a drying conveyor for use in combination with an automatic painting plant for plate-shaped objects l and with an endless conveyor 2 which is provided with a number of parallel carrying members 4 for the plate-shaped objects 1, the said carrying members 4 being disposed at right angles to the direction of movement of the conveyor, indicated by an arrow 3. At least that side of the plate-shaped objects 1 which is facing the carrying members 4 of the painting plant 5, which is shown schematically in FIG. 5, has a coating of paint.
  • the carrying members 4 are supported in a substantially horizontal carrying frame 8 and are, while the objects l are being conveyed, resting in local contact with such side edge portions 6 and 7 of the objects as are located in the direction of movement of the conveyor.
  • the carrying members 4 consist of edgewise positioned plates projecting at right angles to the conveyor path 2 and mounted on rolls 9, the supporting edge 10 of the said plates being preferably formed symmetrically about the vertical center plane of the conveyor and being curved or inclined in relation to the plane of the conveyor path in such manner that the supporting edge 10 is at its greatest distance from the said plane at the side edges of the conveyor path and is lowest at the central part of the conveyor path; this prevents damage to the still unhardened coating of the plate-shaped object 1 at the advancement of the objects through the drying conveyor.
  • the distance of the objects 1 from the conveyor will depend in part upon the width of the objects transversely of the conveyor path as indicated in FIG.
  • a broad object 12 placed symmetrically in the conveyor path is at a greater distance from the conveyor path, that is, in a higher horizontal plane than a narrow, plate-shaped object 13; this has certain disadvantages in the form of formation of stripes in the coating produced by the painting plant transversely of the direction of advancement of the object.
  • a relatively narrow object 13 is placed unsymmetrically in relation to the center plane 11 as indicated in FIG. 4, in which one side edge 6 of the plate-shaped object is guided in a predetermined distance from one side edge of the conveyor path 2, but in that case the object 14 adopts as indicated in the FIG. an inclined position so that the other side edge 7 of the object is lying substantially lower than the first mentioned side edge 6; this involves also the formation of stripes transversely of the direction of advancement of the object.
  • FIG. 5 illustrates schematically a painting plant in which a plate-shaped object 1 is moved in the direction of the arrow 3 on carrying rolls 15 past spray nozzles 16 and 17, of which the former is disposed above and the latter beneath the object 1, so that paint may be applied to the upper side and to the underside of the object 1.
  • the nozzles 16 and 17 produce fanshaped jets 18 and 19, respectively, the planes of which are parallel with the direction of movement of the conveyor, and they perform reciprocating painting strokes at right angles to the path of movement as indicated in FIGS. 3 and 6 by arrows 20.
  • the drying conveyor which is indicated in FIG.
  • the object 1 will tilt if the points of contact between the carrying members and the object 1 are not located in the same plane as that determined by the carrying rolls 15 of the painting plant. This tilting will involve the formation of stripes in the surface of the object, since the upper surface will get closer to the upper spray nozzle 16 and the lower surface be removed more from the nozzle 17 as indicated in grossly enlarged size in FIG. 5.
  • the distance from the nozzles 16,17 to the surface of the object is very critical 17 indicated in FIG. 6, since the edges of the material applied by the fan-shaped jets, 18, 18' and 19, 19', respectively, in the successive painting strokes 21 and 22 of the nozzle 16 have to overlap each other in a zone 23 as indicated in FIG. 6 when a flat object 24 is lying exactly in the predetermined distance from the two nozzles 16 and".
  • the overlapping is necessary, since the fan-shaped jets 18 and 19 give a smaller amount of coating at the outer edges of the jets than at the central part of the jets, and this difference is equalized thereby that the zone 23 receives material at both painting strokes 21 and 22.
  • a corresponding overlapping occurs on the underside of the flat object 24 by the action of the nozzle 17, 17 respectively, which reciprocates in the direction 21 and 22, and their fan-shaped jets, 19 and 19' respectively, produce a zone corresponding to the zone 23. If, however, the object on being transferred from the rolls 15 of the painting plant to the carrying members 8 of the drying conveyor is exposed to a curving, for example as indicated in FIG.
  • the jet 18 will spread to a point p and correspondingly the jet 18 will spread to a point q, so that the overlapping will be substantially greater than the zone 23, that is extending from the point p to the point q, which will result in a stripe having a coating of paint substantially thicker than the normal coating of the zone 23, and such a stripe of thicker coating will be produced at each painting stroke if the distance from the nozzle 16 to the object is greater than normal.
  • the jets 19 and 19' will be of reduced width and the overlapping of the painting strokes 21 and 22 will be less than normal; for example, as shown in FIG. 6, there will be no appreciable overlapping at a point r on the underside of the object 25, and here there will therefore be produced a stripe of inadequately low thickness of the coating.
  • the nozzles for example, are mounted at a distance of 30 cm. from the surface of the object 1 and the thickness of the coating aimed at is 30 t, of which 15 p. has to be applied solely to cover the surface roughness of the object, than a simple geometric observation discloses the following variation in thickness of coating at variation in the distance x from the nozzles 16 and 17 to the surface of the objects.
  • any tilting of the plate-shaped object at its transfer from the painting plant to the drying conveyor has to be prevented.
  • the lifting members 26 may according to the invention each consist of a mechanical, hydraulic or pneumatic lifting cylinder 26 with a displaceable pressure rod 27, as disclosed in FIGS. 2 and 7.
  • At least one set of the lifting members is arranged against each of the side girders 8a and 8b of the carrying frame as indicated in FIG. 2 and symmetrically in relation to the longitudinal center plane of the conveyor path, as a result of which the carrying frame 8 may be lifted as a whole to such height that the contact points 6, 7 of the object will be lying in the plane which is determined by the rolls of the painting plant, so that any tilting of the object at its transfer from the painting plant to the drying conveyor is prevented.
  • the carrying frame has thus to be lifted by means of the lifting cylinders 26 until the side edges 6,7 of the object are in the plane of the rolls 15. If, however, a narrow object 13 is to be conveyed, the carrying frame 8 has to be raised a further distance a as indicated in FIG. 3, by which the ends A and B of the carrying members 10 have both to be lifted a distance a, after which the side edges 6,7 of the object will be lying flush with the roll 15. If a relatively narrow object 14 is to be conveyed with one of its side edges lying in the same contact point to the left in FIG.
  • the lifting members are arranged in one side girder 8a of the carrying frame, the said side girder being parallel with the direction of movement of the conveyor, and the other side girder 8b of the carrying frame is, as indicated in FIG. 2, rotatably mounted in at least one post 28 which is attached to the support.
  • the lifting cylinder 26 is provided with a rack 29 mounted parallely with the direction of displacement of the pressure rod 27, the other end portion 30 of the rack 29 being attached to the displaceable pressure rod 27 of the lifting cylinder, and a gearwheel 31 engaging the said rack is rotatably mounted in the stationary part of the lifting cylinder and mechanically coupled to an electric potentiometer 32 which has a rotatable tap 33 which may be turned by the gearwheel and the position of which determines the level to which the lifting cylinder may be adjusted, the outer terminals 34 and 35 of the said potentiometer 32 being together with the said tap 33 connected toanother potentiometer 36 which is incorporated in an electric bridge circuit which has a source of current 37 and a zero indicator 38, the adjustment of the rotatable tap 39 of the said potentiometer determining in known manner the height to which the lifting cylinder is adjusted as the zero indicator 38 of the bridge circuit is connected to control means 40 of the lifting cylinder 26.
  • At least one of the carrying members and preferably that which is leading in the direction of movement of the plate-shaped object, consists of at least one driven or freely rotating cylindrical roller 43 and 44, whose shaft, 45 and 46, respectively, is adjustable ina vertical plane at right angles to the conveyor path 2 and arranged obliquely in such manner that the upper generatrix of the roller, 47 and 48, respectively, lies substantially in the same plane as one of the tangents to the supporting edge 10 of the carrying member next succeeding, by which a uniform transfer of the plate-shaped objects from the painting plant to the drying conveyor is obtained.
  • Drying conveyor for use in combination with an automatic painting plant for plate-shaped objects, the said conveyor having an endless conveying path provided with a number of parallel carrying membersfor the plate'shaped objects, the said carrying members being supported at right angles to the direction of movement of the conveyor by a horizontal carrying frame, and while the objects are being conveyed, said carrying members are resting in local contact with the side edge portions of the objects parallelly with the direction of movement of the objects, said carrying frame is provided with fluid-operated lifting cylinders which are displaceable and adjustable in vertical direction in relation to the support of the carrying frame and at least one of the lifting cylinders has fluid control means and being provided with a rack mounted parallelly with the direction of displacement of the pressure rod, one end part of the said rack being attached to the displaceable pressure rod of the lifting cylinder, while a gearwheel engaging the rack is rotatably mounted in the stationary part of the lifting cylinder and is mechanically coupled to an electric potentiometer which has a tap that may be rotated by the gearwheel and the position of which tap is an indication

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Conveyors (AREA)
  • Spray Control Apparatus (AREA)
US723819A 1967-05-23 1968-04-24 Drying conveyor Expired - Lifetime US3557938A (en)

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Application Number Priority Date Filing Date Title
DK268767AA DK115684B (da) 1967-05-23 1967-05-23 Tørretransportør.

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US (1) US3557938A (enrdf_load_html_response)
DE (1) DE1778337B1 (enrdf_load_html_response)
DK (1) DK115684B (enrdf_load_html_response)
FR (1) FR1565985A (enrdf_load_html_response)
GB (1) GB1210131A (enrdf_load_html_response)
SE (1) SE338277B (enrdf_load_html_response)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801002A (en) * 1986-02-17 1989-01-31 Gatterlinck GmbH & Co. KG Conveying apparatus for tree trunks
US5072826A (en) * 1987-03-05 1991-12-17 Joy Technologies Inc. Chain conveyor for miner
DE4139990A1 (de) * 1991-12-04 1993-06-09 Thomas Mueller Gmbh, 7141 Murr, De Werkstuecktraeger
US5221347A (en) * 1989-11-07 1993-06-22 Bollhoff Verfahrenstechnik Gmbh & Co. Kg Apparatus for coating both sides of plate-like substrates
US6110282A (en) * 1996-08-30 2000-08-29 Tokyo Electron Limited Coating apparatus for semiconductor process
US6769536B2 (en) * 2000-03-21 2004-08-03 David W. Lutz Expandable over and under line feed system
US6811023B1 (en) * 2003-05-22 2004-11-02 Laitram, L.L.C. Modular trough conveyor belt and modules
US20060051511A1 (en) * 2004-08-13 2006-03-09 Orosz Gary R Apparatus and systems for coating objects
WO2006020857A3 (en) * 2004-08-13 2006-06-01 Ppg Ind Ohio Inc Apparatus and systems for coating objects
CN106219205A (zh) * 2016-08-31 2016-12-14 佛山市创瓷窑炉有限公司 一种用于装饰板材生产过程中的窑具纠偏机构
CN108327051A (zh) * 2018-02-26 2018-07-27 中山市四季会计服务有限公司 一种放置吹干架的陶瓷生产用高效上釉机
CN115535529A (zh) * 2022-11-03 2022-12-30 赵甲向 一种能够防止瓦楞纸板翘起的瓦楞纸板出料装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389502B (de) * 1985-03-01 1989-12-27 Binder Co Ag Foerdereinrichtung
CN114655667B (zh) * 2022-05-25 2022-08-19 四川英创力电子科技股份有限公司 一种印制电路板自动调姿转移装置
CN115489969A (zh) * 2022-09-21 2022-12-20 江苏倍斯库智能科技有限公司 一种可调式快递输送装置

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US289039A (en) * 1883-11-27 Endless chain carrier for brick and tile machines
US3348678A (en) * 1966-01-10 1967-10-24 Stanley L Flowers Automatic weight grading apparatus

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
US3170564A (en) * 1963-04-02 1965-02-23 Gatto Charles Conveyor apparatus
US3301382A (en) * 1963-08-05 1967-01-31 Ball Brothers Co Inc Glassware and carton handling apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US289039A (en) * 1883-11-27 Endless chain carrier for brick and tile machines
US3348678A (en) * 1966-01-10 1967-10-24 Stanley L Flowers Automatic weight grading apparatus

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801002A (en) * 1986-02-17 1989-01-31 Gatterlinck GmbH & Co. KG Conveying apparatus for tree trunks
US5072826A (en) * 1987-03-05 1991-12-17 Joy Technologies Inc. Chain conveyor for miner
US5221347A (en) * 1989-11-07 1993-06-22 Bollhoff Verfahrenstechnik Gmbh & Co. Kg Apparatus for coating both sides of plate-like substrates
DE4139990A1 (de) * 1991-12-04 1993-06-09 Thomas Mueller Gmbh, 7141 Murr, De Werkstuecktraeger
US6110282A (en) * 1996-08-30 2000-08-29 Tokyo Electron Limited Coating apparatus for semiconductor process
US6769536B2 (en) * 2000-03-21 2004-08-03 David W. Lutz Expandable over and under line feed system
US6811023B1 (en) * 2003-05-22 2004-11-02 Laitram, L.L.C. Modular trough conveyor belt and modules
US20040231966A1 (en) * 2003-05-22 2004-11-25 Laitram, L.L.C. Modular trough conveyor belt and modules
US20060051511A1 (en) * 2004-08-13 2006-03-09 Orosz Gary R Apparatus and systems for coating objects
US20060051512A1 (en) * 2004-08-13 2006-03-09 Orosz Gary R Apparatus and systems for coating objects
US20060049062A1 (en) * 2004-08-13 2006-03-09 Orosz Gary R Processes for coating of objects
WO2006020857A3 (en) * 2004-08-13 2006-06-01 Ppg Ind Ohio Inc Apparatus and systems for coating objects
US7455732B2 (en) 2004-08-13 2008-11-25 Ppg Industries Ohio, Inc. Apparatus and systems for coating objects
KR100908948B1 (ko) * 2004-08-13 2009-07-22 피피지 인더스트리즈 오하이오 인코포레이티드 물체를 코팅하기 위한 방법
US7767070B2 (en) 2004-08-13 2010-08-03 Ppg Industries Ohio, Inc. Processes for coating of objects
CN106219205A (zh) * 2016-08-31 2016-12-14 佛山市创瓷窑炉有限公司 一种用于装饰板材生产过程中的窑具纠偏机构
CN106219205B (zh) * 2016-08-31 2018-06-26 佛山市创瓷窑炉有限公司 一种用于装饰板材生产过程中的窑具纠偏机构
CN108327051A (zh) * 2018-02-26 2018-07-27 中山市四季会计服务有限公司 一种放置吹干架的陶瓷生产用高效上釉机
CN115535529A (zh) * 2022-11-03 2022-12-30 赵甲向 一种能够防止瓦楞纸板翘起的瓦楞纸板出料装置

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DK115684B (da) 1969-10-27
FR1565985A (enrdf_load_html_response) 1969-05-02
DE1778337B1 (de) 1971-10-21
GB1210131A (en) 1970-10-28
SE338277B (enrdf_load_html_response) 1971-08-30

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Owner name: MAGNEMAG HAGOU A/S,, STATELESS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:H. NIELSEN & SON MASKINFABRIK A/S;REEL/FRAME:003854/0872

Effective date: 19810305

Owner name: MAGNEMAG HAGOU A/S, METERBUEN 6-12, DK-2740 SKOVLU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:H. NIELSEN & SON MASKINFABRIK A/S;REEL/FRAME:003854/0872

Effective date: 19810305