WO2015113595A1 - Procédé et équipement universels pour bomber des verres plats - Google Patents

Procédé et équipement universels pour bomber des verres plats Download PDF

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Publication number
WO2015113595A1
WO2015113595A1 PCT/EP2014/051725 EP2014051725W WO2015113595A1 WO 2015113595 A1 WO2015113595 A1 WO 2015113595A1 EP 2014051725 W EP2014051725 W EP 2014051725W WO 2015113595 A1 WO2015113595 A1 WO 2015113595A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass sheet
supporting grid
equipment
stanchions
carriages
Prior art date
Application number
PCT/EP2014/051725
Other languages
English (en)
Inventor
Lorenzo PETRONE
Original Assignee
U.B.G.T. S.R.L.
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 U.B.G.T. S.R.L. filed Critical U.B.G.T. S.R.L.
Priority to PCT/EP2014/051725 priority Critical patent/WO2015113595A1/fr
Publication of WO2015113595A1 publication Critical patent/WO2015113595A1/fr

Links

Classifications

    • 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
    • C03B23/025—Re-forming glass sheets by bending by gravity
    • C03B23/0252—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2225/00—Transporting hot glass sheets during their manufacture
    • C03B2225/02—Means for positioning, aligning or orientating the sheets during their travel, e.g. stops

Definitions

  • the present invention relates to a universal method for bending flat glasses.
  • An equipment for embodying the method is also disclosed herein.
  • the windscreen glass can rest only on the perimeter along which it will be subsequently mounted on the vehicle cab.
  • the windscreen manufacture by the above-mentioned equipment is often very complex implying enormous whole amount of resources in terms of raw materials, energy, labor and time consume.
  • U.S. Patent 4,529,433 describes a glass shaping station, in which a glass sheet is shaped by two moulds: an upper vacuum mould and a lower mould, that is limited only to the perimeter profile, the lower mould being lifted against the upper mould for shaping the glass sheet.
  • the lower mould has a shaped outline being connected by threaded shafts to a lower frame generally in the perimeter zone of the lower mould.
  • the threaded shafts are previously adjusted in their height in order to sustain suitably the shaped outline of the lower mould co-operating with the upper vacuum mould for shaping the glass sheet.
  • the position of the threaded shafts can not be changed during the shaping of the glass sheet as their position is bound to the shape of the moulds. All the glass shaping station is arranged for shaping a glass having determined form and sizes.
  • U.S. Patent 5,009,693 describes a method and an equipment for bending flat glasses.
  • An initially flat glass sheet is bent when supported on bending rollers.
  • Lifting actuators are operated to change the vertical position of the bending rollers by vertical lifting means comprising rails, support posts and lifting beams so that the glass sheet can assume a desired contour by the bending rollers.
  • the bending rollers are situated under all the glass sheet surface, and move in height with the rails being raised and lowered by the lifting actuators.
  • a main object of the invention is to provide a universal method and an equipment, to bend one or more flat glasses according to a desired geometric shape and predefined depth, the dimensions of the flat glass being only related to the size of the furnace that supports the method and equipment handling the glass sheets.
  • Another object of the invention is to eliminate waste and imperfections that are usual in the current bending processes.
  • a further object is to maintain the same standard of production as required. Still another object is to enable a plurality of glass sheets according to different geometric shapes to be bent by the same equipment.
  • Another object of the invention is to reduce costs in compliance with the regulations.
  • the invention provides a universal method and an equipment for bending flat glasses that can be single, pairs or multiple, according to geometric forms having a desired curvature, by a bending furnace.
  • the method uses a bending furnace, a loading and unloading station and a shuttle conveyor.
  • the glass which can be in single layer or multiple layers, will be heated in a bending chamber to assume the desired geometric shape at a predetermined temperature.
  • the glass, once bent, will be discharged from the shuttle conveyor onto the loading and unloading station.
  • the method and the equipment can be combined with various components that are usable in manual, semiautomatic or automatic way.
  • the method can be used by both upward thrust or gravity.
  • the method allows a reduction in the bending time, with a result of energy savings.
  • the invention eliminates construction cost required by the existing traditional equipment.
  • the invention allowing the reproducibility in time and the elimination of bending imperfections and stresses in the glass sheet, increases the final quality of the product.
  • Figure 1 is a perspective view of the load bearing structure of a universal equipment for bending flat glasses according to the present invention
  • Figures 2 and 3 are enlarged perspective views of a transverse and longitudinal carriage, respectively, for the load bearing structure according to the present invention
  • Figure 4 is a partially cut perspective view of the load bearing structure in Figure 1, complete with pairs of transverse and longitudinal carriages and showing some stanchions for supporting a glass sheet;
  • Figure 5 is a partially cut perspective view of an enlarged detail of the load bearing structure in figure 4, showing a transverse carriage and a stanchion on a platform, and
  • Figure 6 is a perspective view of the universal equipment according to the present invention showing a flat glass in its bent condition.
  • FIG 1 is a perspective view of the load bearing structure 1 of a universal equipment for bending flat glasses according to the present invention
  • the load bearing structure 1 comprises four uprights indicated as 2.
  • the uprights 2 are meant to be generally as bearing elements. So, if necessary, they may be in the form of pistons so as to make the upper part of the load bearing structure 1 movable upwards.
  • this alternative embodiment is not described in detail below.
  • the load bearing structure 1 has dimensions compared to the type of furnace to which it is intended.
  • the type of furnace in turn differs depending on the product to be made, such as a windshield for a vehicle, a bus or other.
  • the uprights 2 are fixed to one another by means of U-shaped beams, or rather in the form of a channel, in opposite parallel pairs 3, 4, and 5, 6, with their concave sides mirror facing each other.
  • the beams 3, 4 are situated on the beams 5, 6; for this reason, only in order to distinguish them, in the following they will be called upper beams 3, 4 and lower beams 5, 6.
  • Shown in Figure 1 is also a horizontal platform 7 able to shift parallel according to a double ended arrow P with respect to the upper beams 3, 4 and lower beam 5, 6, beams which form a rectangular frame closed by the uprights 2 to which they are attached.
  • actuators 8 for example electric jacks, for vertically shifting the horizontal platform 7.
  • the pairs of upper beams 3, 4 and lower beams 5, 6, are vertically spaced from each other so as to allow the pairs of transverse carriages 9, 9 and longitudinal carriages 10, 10 to slide on said upper and lower beams, respectively.
  • the carriages are manufactured with pairs of side members, indicated as 11, 11 and 12, 12, respectively, joined together with crossbars generally denoted as 13, which are equally spaced consecutively with a desired distance.
  • the crossbars 13 are connected to the side members 11, 11 and 12, 12, by means of bolts or welding, so as to be coplanar with one another.
  • the crossbars 13 are so distributed over the entire length of the carriages to form a supporting grid. It should be apparent that a different embodiment of the supporting grid as a stationary structure is possible, but it would be less functional than the above described one.
  • Each side member 11, 12 is provided with wheels, generally indicated as 14, at its opposite ends.
  • Figure 4 is a partially cut perspective view of the load bearing structure in Figure 1, complete with pairs of transverse carriages 9, 9 and longitudinal carriages 10, 10.
  • the wheels 14 of the transverse carriages 9, 9 advance in the guides constituted by the upper beams 3, 4, and the wheels 14 of the longitudinal carriages 10, 10 advance in the guides represented by the lower beams 5, 6.
  • moving means 15 for moving the carriages 9, 9 and 10, 10 in the form of pulleys and chains, not further described in detail.
  • the moving means 15 having pulleys and chains are only an example, and different means for handling the carriages can be provided. Indeed, alternatively, the carriages can be operated, even automatically, by a screw mechanism, being controlled by a programmable logic controller (PLC).
  • PLC programmable logic controller
  • the moving means 15 have the function of bringing the carriages 9, 9 and 10, 10 to a suitable position for receiving a plurality of stanchions, generally indicated as 16, adapted to support a glass sheet.
  • a plurality of stanchions generally indicated as 16, adapted to support a glass sheet.
  • the carriages 9, 9 and 10, 10 approach or separate from each other in the same direction, respectively.
  • FIG. 5 is a partially cut perspective view of an enlarged detail of the load bearing structure in figure 4. There is shown, for example, a transverse carriage 9 and a stanchion 16 resting on the platform 7.
  • the stanchion 16 comprises a rod 17 inserted vertically slidable in a gripping member 18 adapted to lock on to a pair of crossbars 13 of the carriage 9 after passing through the distance d between them.
  • the gripping member 18 is substantially a vice in the form of a spool provided with two mutually engaged parts, i.e. a lower part 19 and an upper part 20.
  • the parts 19, 20 can be cylindrical, being joined by threaded coupling, or by a clip or other locking means.
  • the parts 19, 20 have, at opposite ends thereof, flanges, generally indicated as 21, being adapted, as a result of the mutual coupling of the parts 19, 20, to approach an upper and a lower plane of each carriage and grip opposite sides of a pair of crossbars 13.
  • the rods 17 of all the stanchions 16 have the same length.
  • the parts 19, 20 of the gripping member 18 are concentrically bored for allowing the rod 17 to slide along a vertical stroke.
  • the rod 17 is provided at the bottom with a lower terminal 22 which acts as a counterweight, and in its upper end with a joint 23 (not shown in detail) combined with a track or head
  • the rod 17 is at least partially threaded for adjustably screwing a stop element
  • the stop element 25 in the form of a nut with a collar.
  • the stop element 25 acts on the rod 17 for limiting its vertical stroke.
  • the rod 17 may be provided with a groove for a cotter pin retainer, or other. It is important that the stop element 25 can abut the upper flange 21 of the gripping member 18.
  • the rod 17 having its lower terminal 22 acting as a counterweight and its articulated upper head 24, which serves as a support for a perimeter point of a glass sheet V, as shown in Figure 6.
  • the terminal 22 of each stanchion 16 is in contact with the horizontal platform 7, as shown in Figure 4 and better in the enlarged detail in Figure 5. Since all of the rods 17 have the same height and all rest with their terminal 22 on the horizontal platform 7, also the glass sheet V is maintained in a horizontal position.
  • the stop element 25 is locked at a certain height with respect to the upper plane of the carriage 9 or 10, or more precisely with respect to the upper flange 21 of the respective gripping member 18.
  • This height denoted as h in Figure 5, indicates how much the glass sheet lowers in its point supported by the stanchion at the end of the sag of the glass sheet V.
  • the stop element 25 in the form of a screw nut with a collar on the threaded part of the rod 17, determines the end of stroke of the same rod 17 in its sliding. In this way the final position of the depth of the desired curvature for the glass sheet V in correspondence of the single stanchion 16 clamped between a pair of crossbars 13 is pre-set.
  • the position of the stop elements 25 along the rods 17 is consequent to a graduated line of the pre-set curvature, directly from a predefined geometric shape or from a control template.
  • actuators 8 such as electric actuators , lifters, worms, or directly through the lifters of the furnace if any, is in an elevated position, all the rods 17 having the same size, rest with its lower end on the horizontal platform 7 and are perfectly parallel to each other, when supporting the flat glass sheet V.
  • the rods of the stanchions inserted in the distances between the crossbars of the carriages are not of equal height, but are previously adjusted, for example telescopically, for copying the desired final geometric shape of the sagged glass sheet.
  • the rods of the stanchions rest on the crossbars with their gripping means, protruding from them upwards to an equal height; when the platform is raised it begins to raise the longest rods of the stanchions so that the glass reaches gradually the pre-established form.
  • the equipment Using appropriate components for the operation and software, inverters, PLC and programs controlled by the PC, the equipment is able to operate in a fully automatic mode after acquiring the geometric shape and the depth of the desired curvature directly from math functions that exactly describe the glass to be bent.

Landscapes

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

Abstract

La présente invention concerne un procédé et un équipement universel pour bomber des verres plats. Le procédé permet de supporter la feuille de verre à courber le long de son périmètre et de l'amener dans une géométrie prédéfinie dans son façonnage sans générer de contraintes dans le produit final. L'équipement comprend une structure porteuse (1), des paires de chariots longitudinaux et transversaux (9, 9, 10, 10) coulissant sur la structure porteuse (1) et une pluralité de montants (16) croisant les chariots en coopération avec une plate-forme horizontale (7) qui peut être déplacée verticalement.
PCT/EP2014/051725 2014-01-29 2014-01-29 Procédé et équipement universels pour bomber des verres plats WO2015113595A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/051725 WO2015113595A1 (fr) 2014-01-29 2014-01-29 Procédé et équipement universels pour bomber des verres plats

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/051725 WO2015113595A1 (fr) 2014-01-29 2014-01-29 Procédé et équipement universels pour bomber des verres plats

Publications (1)

Publication Number Publication Date
WO2015113595A1 true WO2015113595A1 (fr) 2015-08-06

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ID=50151255

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/051725 WO2015113595A1 (fr) 2014-01-29 2014-01-29 Procédé et équipement universels pour bomber des verres plats

Country Status (1)

Country Link
WO (1) WO2015113595A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112469673A (zh) * 2018-12-28 2021-03-09 株式会社三光精衡所 热塑板弯曲的加工方法、夹持装置和凹状热塑板
US20230265004A1 (en) * 2020-08-31 2023-08-24 Brian M. Cooper Historically accurate simulated divided light glass unit and methods of making the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191104402A (en) * 1911-02-21 1911-05-04 Jules Goffin Mould for Shaping Glass Plates.
US4529433A (en) 1984-06-04 1985-07-16 Ppg Industries, Inc. Spring loaded stop member for glass sheet shaping molds
GB2178027A (en) * 1985-07-17 1987-02-04 Techno Glas Eng Gmbh Installation for manufacturing highly curved tempered glass sheets
US4812157A (en) * 1987-11-05 1989-03-14 Smith Quintin R Apparatus for forming glass sheets
US5009693A (en) 1989-10-04 1991-04-23 Muirfield Holdings L.P. Method and apparatus for bending glass
EP1006086A2 (fr) * 1998-12-03 2000-06-07 Nippon Sheet Glass Co., Ltd. Installation de bombage de feuilles de verre avec des unités de bombage et de transport améliorées

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191104402A (en) * 1911-02-21 1911-05-04 Jules Goffin Mould for Shaping Glass Plates.
US4529433A (en) 1984-06-04 1985-07-16 Ppg Industries, Inc. Spring loaded stop member for glass sheet shaping molds
GB2178027A (en) * 1985-07-17 1987-02-04 Techno Glas Eng Gmbh Installation for manufacturing highly curved tempered glass sheets
US4812157A (en) * 1987-11-05 1989-03-14 Smith Quintin R Apparatus for forming glass sheets
US5009693A (en) 1989-10-04 1991-04-23 Muirfield Holdings L.P. Method and apparatus for bending glass
EP1006086A2 (fr) * 1998-12-03 2000-06-07 Nippon Sheet Glass Co., Ltd. Installation de bombage de feuilles de verre avec des unités de bombage et de transport améliorées

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112469673A (zh) * 2018-12-28 2021-03-09 株式会社三光精衡所 热塑板弯曲的加工方法、夹持装置和凹状热塑板
US20210122661A1 (en) * 2018-12-28 2021-04-29 Sanko Seikosho Co., Ltd. Thermoplastic plate bending method, working jig, and concave thermoplastic plate
US20230265004A1 (en) * 2020-08-31 2023-08-24 Brian M. Cooper Historically accurate simulated divided light glass unit and methods of making the same
US11964897B2 (en) * 2020-08-31 2024-04-23 The Cooper Group, Llc Historically accurate simulated divided light glass unit and methods of making the same

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