EP0163636A1 - Dispositif permettant de courber et tremper des feuilles de verre - Google Patents

Dispositif permettant de courber et tremper des feuilles de verre

Info

Publication number
EP0163636A1
EP0163636A1 EP19840900207 EP84900207A EP0163636A1 EP 0163636 A1 EP0163636 A1 EP 0163636A1 EP 19840900207 EP19840900207 EP 19840900207 EP 84900207 A EP84900207 A EP 84900207A EP 0163636 A1 EP0163636 A1 EP 0163636A1
Authority
EP
European Patent Office
Prior art keywords
shaping
sheets
glass
glass sheets
belts
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Withdrawn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
EP19840900207
Other languages
German (de)
English (en)
Inventor
Harold E. Mckelvey
Edward D. Sheldon
William T. Livingston
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.)
Shatterproof Glass Corp
Original Assignee
Shatterproof Glass Corp
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 Shatterproof Glass Corp filed Critical Shatterproof Glass Corp
Publication of EP0163636A1 publication Critical patent/EP0163636A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
    • C03B27/0442—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
    • C03B35/161—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors specially adapted for bent sheets or ribbons
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
    • C03B35/165—Supports or couplings for roller ends, e.g. trunions, gudgeons
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
    • C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
    • C03B35/187—Rollers specially adapted for both flat and bent sheets or ribbons, i.e. rollers of adjustable curvature
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
    • C03B40/005—Fabrics, felts or loose covers

Definitions

  • the present invention relates to an improved apparatus for manufacturing glass sheets as are used for automobile windows, sidelights and the like.
  • the invention has particular utility for forming curved tempered glass sheets such as are currently used for automobile windows, hence will be described in detail with reference thereto.
  • Fig. 1 is a longitudinal side view of apparatus provided by the present invention
  • Fig. 2 is a plan view thereof
  • Fig. 3 is a side view the pressing means constructed in accordance with the invention
  • Fig. 4 is a front view thereof
  • Fig. 5 is a front elevation of the upper and lower pressing units
  • Fig. 6 is a modified form of lower pressing unit
  • Fig. 7 is a front elevation of the guide means for the endless belts
  • Fig. 8 is a detail section taken substantially on line 8—8 of Fig. 7,
  • Fig. 9 is a transverse section through the tempering means showing the arrangement of the conveyor rolls for transporting curved glass sheets
  • Fig. 10 is a similar view with the conveyor rolls in horizontally aligned position
  • Fig. 11 is a longitudinal side view of the tempering means
  • Fig. 12 is a top plan, view of Fig. 11.
  • the glass sheet curving and tempering apparatus of this invention includes generally an elongated furnace A in which the glass sheets S, after being cut to size, are heated to the softening point of the glass, a curving or shaping press B for receiving the heated glass sheets from the furnace, and a tempering or quenching section C for receiving the curved glass sheets from the shaping press and for rapidly chilling the glass sheets to establish a permanent stress pattern therein.
  • the glass sheets S are transported horizontally through the furnace A by any suitable conveyor means such as the rolls 15.
  • the furnace can be heated in any conventional manner as by gas fired radiant heating tubes 16.
  • the heated glass sheets move to the curving or shaping press B and then into the tempering section C where the curved glass sheets are received and carried forwardly upon a series of spaced horizontal conveyor rolls 17 located between the upper and lower blast heads D and E.
  • the tempered glass sheets are
  • OMPI then delivered from the quenching section onto a series of carry-out rolls (not shown) where the sheets are cooled and removed.
  • the shaping press B is a quick-acting type punch press and is adapted to receive successive glass sheets from the furnace and, after shaping, to deliver them to the blastheads D and E on a high speed production basis.
  • the shaping press B comprises the usual body structure 18, motor 19 for driving a crank shaft 20 connected to a fly wheel 21.
  • the crank shaft operates a vertically movable ram 22 to which is secured a horizontal base plate 23.
  • the press is provided with upper and lower pressing units 24 and 25 (Fig. 5) for curving or shaping therebetween the glass sheets received from the furnace.
  • the upper shaping unit 24 comprises a substantially rectangular metal plate 26 which is bent transversely to provide a bottom convex shaping surface of a curvature to be imparted to the glass sheets. Covering this surface is a sheet 26a of cushioning material such as fiber glass cloth.
  • the pressing plate 26 is supported at its opposite sides by spaced substantially vertical bolts 27 and 28 which pass upwardly through a horizontal bolster plate 29 and are secured thereto by nuts 30 beneath which are located spherical washers 31.
  • the bolster plate 29 is hung from the horizontal base plate 23 by hangers 32 and 33
  • the lower ends of the bolts 27 and 28 are secured in elongated bars 34 and 35 respectively.
  • the lower shaping unit 25 comprises a substantially rectangular metal plate 36 having an upper concave curvature complementary to the convex curvature of the upper shaping plate 26.
  • the shaping plate 36 is secured at its opposite sides to spaced clamps 37 and 38 attached by bolts 39 and 40 to flexible stanchions 41 and 42, said bolts passing through said stanchions and receiving thereon nuts 43.
  • the stanchions are secured to a base plate 44 by angle brackets 45.
  • the WIPO and 42 will allow said stanchions to bend slightly inwardly toward one another upon contact of the upper pressing plate 26 with the glass sheets to cushion them against breakage.
  • the upper surface of the pressing plate 36 is provided with a layer of fiber glass cloth 46, or the like.
  • a back-up device for said plate.
  • This back-up device may be of the type shown in either Fig. 5 or Fig. 6.
  • Fig. 5 it includes a pair of spaced parallel rods 47 and 48 arranged lengthwise of the pressing plate 26 substantially midway of the opposite sides thereof and secured to elongated bars 49 and 50.
  • the bars 49 and 50 are supported from the bolster plate 29 and are connected together by spaced transverse bracing bolts 51.
  • the back-up device consists of a semi-cylindrical plate 52 engaging the pressing plate 26 substantially midway of the opposite sides thereof and secured along its side edges as at 53 to angle brackets 54 secured to the bolster plate 29.
  • the glass sheets S are received upon the horizontal flight F of a plurality of relatively narrow endless belts 55 arranged side-by-side in spaced parallel relation and which are adapted to position the glass sheets for pressing between the pressing units 24 and 25; and to subsequently deliver the curved glass sheets to the tempering section C.
  • the horizontal flight of the endless belts travel over and in contact with the lower pressing member 36 and upon leaving said member pass downwardly over a stationary guide bar 56 which is concavely curved to correspond to the curvature of the lower pressing plate 36.
  • the endless belts 55 continue downwardly around a guide roll 57, drive roll 58, belt tightening roll 59 and succeeding guide rolls 60 and 61 into the horizontal flight.
  • the endless belts 55 are driven from a motor 62 through a gear reduction unit 63 and sprocket chain 64
  • OMPI trained about a sprocket 65 keyed to the shaft 66 of the gear reduction unit and also about a sprocket 67 keyed to the shaft 68 of drive roll 58.
  • a belt tightening device 69 may be associated with the guide roll 59.
  • the guide bar 56 (Figs. 7 and 8) is supported at its opposite ends by brackets 70 and 71 secured to plates 72 and 73 respectively.
  • a second guide bar 74 Positioned beneath the guide bar 56 is a second guide bar 74 and secured thereto are a series of spaced belt guides 75 which consist of bolts passing through said guide bar and having threaded thereon nuts 76.
  • the endless belts pass between the heads 77 of adjacent guide bolts 75 which prevent said belts from riding inwardly toward the center of the curved guide bar 56.
  • a third guide bar 78 Mounted directly above and parallel with the guide bar 74 is a third guide bar 78 to which are secured a series of spaced cushioning pads 79 over which the endless belts ride. These pads may be of any desired cushioning material, such as fiber glass, and are secured to the guide bar by screws 80. These pads are located between adjacent guide bolts 75 and while only two pads are shown in Fig. 7 it will be understood that one pad is provided for each endless belt 55.
  • each arm (only one being shown) which carry at their lower ends the guide roll 61 over which the endless belts travel as they enter their horizontal flight.
  • the pressing means is preferably mounted upon wheels 88 which run on transverse rails 89 to permit the press to be moved outwardly of the furnace and tempering section for maintenance or repair.
  • the tempering section C comprises upper and lower blastheads D and E, with the curved glass sheets being carried therebetween upon a series of conveyor rolls 17.
  • each of the blastheads consists of a plurality of elongated parallel tubular members 90 extending transversely of the direction of travel of the glass sheets. Air or other gas for rapidly cooling the glass sheets is supplied to one or both ends of the tubular members from a suitable source and discharge therefrom against the upper and lower surfaces of the glass sheets through longitudinal slots or spaced orifices in the bottom wall of the upper tubular members and the top wall of the bottom tubular members. Since the specific construction and operation of the blastheads form no part of the present invention per se it is not believed that a more detailed illustration or description of them is necessary.
  • the conveyor rolls 17 are carried by a supporting framework shown in Fig. 9 which comprises a pair of vertical supporting posts 91 and 92 at each end of the roll conveyor joined by transverse upper and lower bracing members 91a and 92a.
  • the posts 91 and 92 at opposite ends of the roll conveyor are connected together at their upper ends by the longitudinally extending angle beams 93 and 94 respectively.
  • Extending transversely of the roll conveyor and supported on the angle beams 93 and 94 are the horizontally spaced support members 95 and 96 secured at opposite ends to the uprights 97 and 98 which form a part of the support structure.
  • every other conveyor roll 17 are parallel with one another and incline in the same direction, which the alternate rolls are parallel with one another and incline in the opposite direction.
  • adjacent rolls 17a and Ub cross one another at an angle with the result that there is provided a substantially V-shaped saddle for supporting the curved glass sheets S as they are carried forwardly by the rolls.
  • the conveyor rolls 17a and 17b are provided with shafts 99 and 100 respectively.
  • the shaft 99 of roll 17a is journaled at one end in a gear box 101 at one side of the roll conveyor and at its opposite end in a pillow block 102.
  • the shaft 100 of roll 17b is journaled at one end in a gear box 103 at the opposite side of the roll conveyor and at its other end in a pillow block 104.
  • the drive shafts 105 and 106 Extending longitudinally of the roll conveyor at opposite sides thereof are the drive shafts 105 and 106 for the rolls 17, said shafts being supported in spaced bearing members 107 and 108 respectively. These bearing members are carried by the longitudinally extending tubular members 109 and 100 secured to the uprights 97 and 98.
  • the shaft 105 passes through the gear boxes 101 and keyed to said shaft in each gear box is a worm gear 111 meshing with a worm 112 keyed to the adjacent end of the roll shaft 99.
  • the shaft 106 passes through the gear boxes 103 of rolls 17b and has keyed thereto in each gear box a worm gear 112 meshing with a worm 113 keyed to the adjacent end of roll shaft 100.
  • the shafts 105 and 106 are driven from a motor 114 (Fig. 12) by a sprocket chain 115 through a gear reduction unit 116.
  • a gear reduction unit 116 Keyed to the shaft 117 of gear reduction unit 116 are two sprockets. Trained about one of these sprockets is a sprocket chain 118 driving a sprocket keyed to the drive shaft 105, while a second sprocket chain 119 is trained about the other sprocket on shaft 117 and also about a sprocket on drive shaft 106. In this way, operation of the motor 114 will rotate the two shafts 105 and 106 and the conveyor rolls associated therewith.
  • the pillow blocks 102 and 104 in which the non-driven ends of the conveyor rolls 17a and 17b respectively are journaled are supported adjacent their opposite ends by jacks 123 and 124 respectively.
  • Each jack includes a substantially vertical jack screw 125 pivoted at its upper end as at 126, to a block 127 secured to the associated angle beam 121 or 122 and passing downwardly through a gear box 128 pivoted as at 129 to a bracket 129a on the supporting framework.
  • Extending longitudinally at opposite sides of the roll conveyor are shafts 130 and 131 journaled at their opposite ends in the associated gear boxes 128, each shaft having keyed thereto worm gears 132 meshing with worms 133 in said gear boxes 128.
  • a hand wheel 134 provided at one end of each shaft 130 and 131 the jacks 123 and 124 at opposite sides of the roll conveyor can be operated to move the related ends of the conveyor rolls 17a or 17b upwardly or downwardly to vary the angle of inclination thereof depending upon the curvature of the glass sheets.
  • the supporting framework is mounted on wheels 135 and 136 that run along rails 137 and 138 so that the roll conveyor can be moved as a unit toward or away from the pressing apparatus.
  • the apparatus herein provided is of particular utility in the pressing of initially flat sheets of glass to predetermined curvatures, it can be readily adapted to the curving or shaping of the softened glass sheets under their own weight without any downward pressing force. This is especially true when shaping the glass sheets to relatively shallow cylindrical curvatures.
  • the apparatus can also be adapted to the tempering of flat sheets of glass. In this case, the conveyor rolls 17 of the tempering section are adjusted to a a horizontally aligned position as indicated in Fig.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

Dispositif (A, B et C) permettant de produire des feuilles de verre trempé courbées (S), comprenant un organe (16) permettant de chauffer les feuilles de verre jusqu'à la température de ramollissement, un organe (B) recevant les feuilles ramollies provenant de l'organe chauffant et servant à leur donner la courbure désirée, et un organe (C) recevant les feuilles courbées par l'organe de mise en forme et servant à les tremper. L'organe de mise en forme comprend des organes de mise en forme supérieurs (24, 26) et inférieurs (25), ainsi qu'une pluralité de courroies sans fin (55) relativement étroites, écartées et parallèles et effectuant un parcours sensiblement horizontal pour transporter les feuilles de verre entre les organes de mise en forme, l'organe de mise en forme inférieur possédant une surface de mise en forme supérieure concave (36) possédant une longueur et une largeur au moins égales à celles des feuilles de verre, la courbure de la surface de mise en forme étant disposée transversalement par rapport à la ligne de déplacement des courroies, qui passent au-dessus et en contact avec la surface, des organes (19-22) servant à abaisser et lever l'organe de mise en forme supérieur, et des organes (62) entraînant les courroies sans fin qui reçoivent les feuilles de verre ramollies de l'organe chauffant, les transportent sur la surface de mise en forme et délivrent ensuite les feuilles de verre courbées à l'organe de trempe. Le dispositif comprend en outre un organe de guidage horizontal (56) courbé de manière concave pour correspondre à la courbure de la surface de mise en forme et sur lequel passent les courroies sans fin en quittant la surface de mise en forme, et des organes (74-77) sur l'organe de guidage pour empêcher le déplacement des courroies vers l'intérieur en direction du centre de la surface de mise en forme. Les feuilles de verre sont transportées à travers l'organe de trempe (C) sur une série de rouleaux écartés horizontalement (17), les rouleaux adjacents (17A et 17B) étant inclinés dans des
EP19840900207 1983-11-29 1983-11-29 Dispositif permettant de courber et tremper des feuilles de verre Withdrawn EP0163636A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1983/001866 WO1985002392A1 (fr) 1983-11-29 1983-11-29 Dispositif permettant de courber et tremper des feuilles de verre

Publications (1)

Publication Number Publication Date
EP0163636A1 true EP0163636A1 (fr) 1985-12-11

Family

ID=22175604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840900207 Withdrawn EP0163636A1 (fr) 1983-11-29 1983-11-29 Dispositif permettant de courber et tremper des feuilles de verre

Country Status (2)

Country Link
EP (1) EP0163636A1 (fr)
WO (1) WO1985002392A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799948A (en) * 1987-08-20 1989-01-24 Libbey-Owens-Ford Co. Adjustable bearing rail apparatus for bending glass sheets
IT1224765B (it) * 1988-10-11 1990-10-18 Siv Soc Italiana Vetro Procedimento e apparecchiatura perfezionati per la curvatura di lastre piane di vetro

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL301271A (fr) * 1962-12-03
US3318672A (en) * 1963-08-21 1967-05-09 Pittsburgh Plate Glass Co Method and apparatus for press bending glass sheets
FR2221409A1 (en) * 1973-03-12 1974-10-11 Saint Gobain Glass bending, on cantilevered rollers an angular relationship - to convey sheets or ribbon in a continuous process
US4318728A (en) * 1979-08-27 1982-03-09 Ppg Industries, Inc. Double link arrangement for press bending molds and method of press shaping glass sheets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8502392A1 *

Also Published As

Publication number Publication date
WO1985002392A1 (fr) 1985-06-06

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Inventor name: LIVINGSTON, WILLIAM, T.

Inventor name: MCKELVEY, HAROLD, E.

Inventor name: SHELDON, EDWARD, D.