WO1995007863A1 - Apparatus and method for positioning glass sheets - Google Patents
Apparatus and method for positioning glass sheets Download PDFInfo
- Publication number
- WO1995007863A1 WO1995007863A1 PCT/US1994/010095 US9410095W WO9507863A1 WO 1995007863 A1 WO1995007863 A1 WO 1995007863A1 US 9410095 W US9410095 W US 9410095W WO 9507863 A1 WO9507863 A1 WO 9507863A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass sheet
- mold
- conveyor
- ring
- vacuum
- Prior art date
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
- C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
-
- 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
- C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
- C03B23/0352—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet
- C03B23/0357—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet by suction without blowing, e.g. with vacuum or by venturi effect
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/24—Making hollow glass sheets or bricks
-
- 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
-
- 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
- This invention relates to apparatus and a method for positioning a glass sheet in a side exit glass sheet forming system including an air float conveyor.
- a heated glass sheet is conveyed in a longitudinal direction of conveyance along a roller conveyor comprised of a plurality of conveyor rolls. The positioning is performed upstream or at a forming station on the roller conveyor that transports the glass sheet.
- a male vacuum mold at an elevation above the conveyor rolls, is movable vertically with respect to the roller conveyor to receive the heated glass sheet.
- the heated glass sheet is picked up as the vacuum mold descends over the positioned glass sheet on the roller conveyor, lift jets are activated to lift the glass sheet up to the vacuum mold and a vacuum force is actuated.
- the mold is then elevated with the glass sheet attached to the mold by the vacuum action.
- a glass sheet processing ring is subsequently positioned below the vacuum mold and glass sheet.
- the glass sheet processing ring may be a press ring, quench ring or combination press-quench ring.
- the glass sheet As the glass sheet is positioned on the roller conveyor, there is the occasional surface damage to the glass sheet which occurs when the glass sheet is slid on the conveyor rolls. Also, the positioning of the glass upstream of the forming section does not lend itself to the glass sheet positioning accuracy required in today' s tight tolerance glass sheet applications.
- An object of the present invention is to provide improved apparatus for positioning glass sheets for forming in a side exit glass sheet forming system.
- Another object of the present invention is to provide apparatus for positioning glass sheets in a side exit glass sheet forming system that utilizes an air flotation conveyor to eliminate damage to the glass sheets during the positioning action.
- Another object of the present invention is to provide an improved method for positioning glass sheets in a side exit glass sheet forming system that lends itself to accurate lateral and longitudinal positioning of the glass sheets.
- apparatus for positioning and forming heated glass sheets in a side exit glass sheet forming system includes a longitudinally extending air floatation conveyor for receiving and floating a heated glass sheet in a plane of conveyance provided by a cushion of air.
- a glass sheet vacuum mold is vertically movably mounted above the air floatation conveyor for receiving the heated glass sheet.
- a glass sheet positioner mounted relative to the vacuum mold is laterally and longitudinally movable for engaging and laterally and longitudinally positioning the glass sheet with respect to the mold.
- An array of lift jets located beneath the mold and below the plane of conveyance and interspersed amongst the air floatation conveyor is operable for lifting the glass sheet up to the vacuum mold through the application of lifting air on the lower surface of the glass sheet.
- a method for positioning a heated glass sheet in the above glass sheet forming system includes the steps of conveying the glass sheet on a cushion of air, peripherally engaging the floating glass, locating the engaged floating glass sheet beneath the vacuum mold, applying jets of lifting air to lift the floating glass sheet upwardly to the vacuum mold, and applying vacuum to engage the positioned glass sheet on the vacuum mold.
- FIGURE 1 is a perspective view of a forming section of a side exit glass sheet forming system including an air flotation conveyor, glass sheet vacuum molds and a lift jet array constructed in accordance with the present invention illustrating a first position of a positioning apparatus for capturing conveyed glass sheets as they transfer from a roller conveyor to the air flotation conveyor;
- FIGURE 2 is a perspective view of the forming section of Figure 1 illustrating a second position of the positioning apparatus positioning the glass sheets floated on the air float bed beneath the vacuum molds;
- FIGURE 3 is a perspective view of the forming section of Figure 1 illustrating a third position of the positioning apparatus wherein a press-quench ring has moved beneath the vacuum molds;
- FIGURE 4 is a schematic view that illustrates an alternate embodiment wherein an air float conveyor conveys the glass sheet for heating.
- apparatus for positioning glass sheets constructed in accordance with the present invention is generally indicated by reference numeral 10 and defines in part the forming section of a side exit glass sheet forming system.
- apparatus 10 is used to catch a heated glass sheet G, facilitate the transfer and receipt of the heated glass sheet and accurately position it for subsequent forming.
- Apparatus 10 eliminates the damage caused to glass sheets during positioning on roller conveyors prior to pickup.
- apparatus 10 includes a longitudinally extending air flotation conveyor 12 comprised of a plurality of transversely extending air supply tubes 13 for receiving and floating a heated glass sheet G in a plane of conveyance on a cushion of air.
- the air supply tubes 13 extend laterally with respect to the longitudinal direction of conveyance and are spaced from each other, and have upper openings through which pressurized air is supplied to provide the gas cushion on which the glass sheet floats.
- a glass sheet vacuum mold 14 illustrated as a forming mold is vertically movably mounted above the air floatation conveyor 12 for receiving the heated glass sheet G from an upstream location. The direction of glass sheet conveyance is indicated by arrow 15.
- a glass sheet positioner 16 mounted relative to the mold 14 is laterally and longitudinally movable for engaging and laterally and longitudinally positioning the glass sheet G with respect to the mold.
- a conventional actuator 28 is connected to each positioner 16 to move the positioner longitudinally (i.e., in the direction of conveyance of the glass sheet) as well as laterally
- controller 30 is operable for independently controlling the operation of the actuators 28.
- controller 30 is a microprocessor which can, through feedback loops, read the velocity of the glass sheet G as it approaches the molds 14 and control the appropriate actuator 28 so that the .glass sheet is engaged by the positioner 16 with minimum relative velocity and subsequently control the actuator so that the glass sheet is brought to an accurate at rest position by the end of its deceleration.
- the controller 30 also preferably automatically compensates to change end points of two differently sized glass sheets which are to be laminated after bending.
- An array of lift jets 18 is located beneath the mold 14 and below the plane of conveyance.
- the array of lift jets 18 includes nozzles 19 that are interspersed amongst the air flotation conveyor 12 between its air supply tubes 13. Pressurized air is supplied through nozzles 19 to lift the glass sheet G to the mold through the application of lifting air to the bottom surface of the glass sheet.
- a roller conveyor 20 defined by a plurality of conveyor rolls 21 is mounted adjacent and upstream of the air floatation conveyor 12. Roller conveyor 20 transports and imparts movement to the heated glass sheet G. Such roller conveyors 20 are well known in the art.
- an air float conveyor 20' can be utilized for supporting and or transporting the heated glass sheet G upstream of the air flotation conveyor 12. Both the roller conveyor 20 (or air float conveyor 20') and ,air flotation conveyor 12 are located in a glass sheet furnace (not shown) .
- Positioners 16 include glass sheet engagement members 22 which are operable to engage the periphery of the glass sheet G.
- the engagement members 22 are thin wheels rotatable about a vertical axis for engaging the edge of the glass sheet with rolling contact.
- Engagement members 22 of glass sheet positioner 16 engage the periphery of glass sheet G upstream of the forming mold 14, as illustrated, and are operable to travel downstream transporting the glass sheet and positioning the glass sheet beneath the mold 14, as shown in Figure 2.
- glass sheet G has been positioned beneath mold 14. Mold 14 is lowered and lifting air is applied by the lift jets 18 to the bottom surface of the glass sheet to lift the glass sheet G onto the mold. At the same time, vacuum is applied by the mold 14 to hold the glass sheet G against the mold and preform the glass sheet.
- the arrangement of the air flotation conveyor 12, mold 14, positioners 16 and array of lift jets 18, eliminates the possibility of the glass sheet G being damaged as it is received from the air flotation conveyor onto the mold.
- the mold With the glass sheet G held against the mold 14, the mold is raised and the positioner 16 is moved upstream to engage- a subsequent glass sheet.
- a glass sheet processing ring 26 herein illustrated as a combination press-quench ring, is transversely movable relative to the air flotation conveyor 12 between positions wherein the ring is beneath mold 14 and out to the side of the mold to side exit.
- the press-quench ring 26 is used for press forming the glass sheet G between the mold 14 and ring followed by subsequent quenching on the ring.
- ring 26 is a press ring, wherein the mold 14 is moved relative to the ring to press form the perimeter of the glass sheet G between the ring and mold.
- Ring 26 can also be a quench ring and the glass sheet G can be formed by releasing vacuum pressure in the mold 14 such that the glass sheet is released from the mold and then sags to the required shape on the quench ring.
- the vacuum drawn by mold 14 is discontinued after the press forming, the vacuum mold is raised, and the glass sheet G is caused to be transferred to the ring 26 for subsequent processing. Ring 26 and the glass sheet G are then moved to the position out to the side of the mold 14 and outside of the glass sheet furnace.
- a method for positioning a heated glass sheet in the glass sheet forming system described includes the steps of conveying the glass sheet on a cushion of air, peripherally engaging the floating glass sheet, locating the engaged floating glass sheet beneath the vacuum mold 14, applying jets of lifting air to lift the floating glass sheet upwardly onto the vacuum mold, and applying vacuum to engage the positioned glass sheet on the vacuum mold.
- the glass sheet G is press bent between mold 14 and press or quench-press ring 26 as the vacuum mold, with the glass sheet thereon, is lowered until the perimeter of the glass sheet is press bent by the ring against the vacuum mold.
- the vacuum of vacuum mold 14 can be discontinued to release the glass sheet G onto the quench ring 26 to shape the glass sheet under the force of gravity.
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)
- Joining Of Glass To Other Materials (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002171221A CA2171221C (en) | 1993-09-13 | 1994-09-09 | Apparatus and method for positioning glass sheets |
KR1019960701256A KR960704812A (en) | 1993-09-13 | 1994-09-09 | Machinery and method for positioning glass plates |
JP50924595A JP3953095B2 (en) | 1993-09-13 | 1994-09-09 | Glass sheet positioning apparatus and method |
EP94928562A EP0739315B1 (en) | 1993-09-13 | 1994-09-09 | Apparatus and method for positioning glass sheets |
AT94928562T ATE191707T1 (en) | 1993-09-13 | 1994-09-09 | DEVICE AND METHOD FOR POSITIONING GLASS PANELS |
BR9407468A BR9407468A (en) | 1993-09-13 | 1994-09-09 | Apparatus and process for positioning at least one heated glass sheet |
AU77951/94A AU697828B2 (en) | 1993-09-13 | 1994-09-09 | Apparatus and method for positioning glass sheets |
DE69423982T DE69423982D1 (en) | 1993-09-13 | 1994-09-09 | DEVICE AND METHOD FOR POSITIONING GLASS PANELS |
FI961121A FI961121A (en) | 1993-09-13 | 1996-03-11 | Apparatus and method for positioning glass sheets |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/120,687 US5403369A (en) | 1993-09-13 | 1993-09-13 | Apparatus and method for positioning glass sheets |
US120,687 | 1993-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995007863A1 true WO1995007863A1 (en) | 1995-03-23 |
Family
ID=22391929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1994/010095 WO1995007863A1 (en) | 1993-09-13 | 1994-09-09 | Apparatus and method for positioning glass sheets |
Country Status (11)
Country | Link |
---|---|
US (1) | US5403369A (en) |
EP (1) | EP0739315B1 (en) |
JP (1) | JP3953095B2 (en) |
KR (1) | KR960704812A (en) |
AT (1) | ATE191707T1 (en) |
AU (1) | AU697828B2 (en) |
BR (1) | BR9407468A (en) |
CA (1) | CA2171221C (en) |
DE (1) | DE69423982D1 (en) |
FI (1) | FI961121A (en) |
WO (1) | WO1995007863A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5889010A (en) * | 1995-05-18 | 1999-03-30 | Pfizer Inc. | Benzimidazole derivatives having dopaminergic activity |
WO2022189747A1 (en) * | 2021-03-09 | 2022-09-15 | Saint-Gobain Glass France | Device for positioning glass sheets, facility for manufacturing glazing comprising such a device and method for automatically controlling the positioning of the glass sheets in such a facility |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5669953A (en) * | 1995-03-07 | 1997-09-23 | Glasstech, Inc. | Glass sheet forming system |
US5833729A (en) * | 1996-12-16 | 1998-11-10 | Ppg Industries, Inc. | Method and apparatus for bending glass sheets |
DE10045479A1 (en) * | 2000-09-14 | 2002-04-04 | Schott Glas | Method and device for contactless storage and transportation of flat glass |
JP4688011B2 (en) * | 2001-05-09 | 2011-05-25 | 旭硝子株式会社 | Glass plate bending apparatus and method |
US20030182969A1 (en) * | 2002-03-28 | 2003-10-02 | Dunifon Thomas A. | Glass handling and locating system |
US6904771B2 (en) * | 2002-07-25 | 2005-06-14 | Visteon Global Technologies, Inc. | Method of forming and transporting curved glass |
US9573833B2 (en) | 2014-03-31 | 2017-02-21 | Corning Incorporated | Method and lift jet floatation system for shaping thin glass |
TWI729020B (en) * | 2015-11-02 | 2021-06-01 | 美商玻璃技術股份有限公司 | Glass sheet positioning apparatus and method and glass sheet processing system |
EP3538498B1 (en) * | 2016-11-11 | 2023-01-25 | Pilkington Group Limited | Method of shaping a glass sheet and glass shaping line utilized therein |
CN110027911A (en) * | 2019-05-23 | 2019-07-19 | 黄锡清 | A kind of fused quartz ceramic air bearing transmission platform structure for glass production |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4204853A (en) * | 1978-11-13 | 1980-05-27 | Ppg Industries, Inc. | Glass sheet alignment means and method of using |
US4386952A (en) * | 1982-03-31 | 1983-06-07 | Nitschke David B | Glass sheet bending system utilizing gas jets |
US4802904A (en) * | 1986-07-16 | 1989-02-07 | Saint-Gobain Vitrage | Method and apparatus for positioning of glass plates to bend them into a convex shape |
US5009695A (en) * | 1988-06-08 | 1991-04-23 | Saint-Gobain Vitrage | Apparatus for producing two dimensionally bent glass |
US5066321A (en) * | 1990-07-19 | 1991-11-19 | Glasstech, Inc. | Device for positioning hot glass sheets |
US5096478A (en) * | 1991-03-26 | 1992-03-17 | Glasstech, Inc. | Apparatus and method for conveying glass sheets |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3992182A (en) * | 1974-09-18 | 1976-11-16 | Ppg Industries, Inc. | Conveying sheets at non-uniform speed |
US4475937A (en) * | 1982-09-01 | 1984-10-09 | Glasstech, Inc. | Conveyor controller for glass sheet processing equipment |
JPS6387408A (en) * | 1986-09-29 | 1988-04-18 | Nippon Sheet Glass Co Ltd | Conveying speed controller |
IT1250082B (en) * | 1991-07-10 | 1995-03-30 | Siv Soc Italiana Vetro | APPARATUS AND PROCEDURE FOR THE MANUFACTURE OF GLASSES WITH A COMPLEX SHAPE SUITABLE FOR USE ON VEHICLES |
-
1993
- 1993-09-13 US US08/120,687 patent/US5403369A/en not_active Expired - Lifetime
-
1994
- 1994-09-09 EP EP94928562A patent/EP0739315B1/en not_active Expired - Lifetime
- 1994-09-09 BR BR9407468A patent/BR9407468A/en not_active IP Right Cessation
- 1994-09-09 AU AU77951/94A patent/AU697828B2/en not_active Ceased
- 1994-09-09 KR KR1019960701256A patent/KR960704812A/en not_active Application Discontinuation
- 1994-09-09 JP JP50924595A patent/JP3953095B2/en not_active Expired - Fee Related
- 1994-09-09 DE DE69423982T patent/DE69423982D1/en not_active Expired - Lifetime
- 1994-09-09 AT AT94928562T patent/ATE191707T1/en not_active IP Right Cessation
- 1994-09-09 CA CA002171221A patent/CA2171221C/en not_active Expired - Fee Related
- 1994-09-09 WO PCT/US1994/010095 patent/WO1995007863A1/en active IP Right Grant
-
1996
- 1996-03-11 FI FI961121A patent/FI961121A/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4204853A (en) * | 1978-11-13 | 1980-05-27 | Ppg Industries, Inc. | Glass sheet alignment means and method of using |
US4386952A (en) * | 1982-03-31 | 1983-06-07 | Nitschke David B | Glass sheet bending system utilizing gas jets |
US4802904A (en) * | 1986-07-16 | 1989-02-07 | Saint-Gobain Vitrage | Method and apparatus for positioning of glass plates to bend them into a convex shape |
US5009695A (en) * | 1988-06-08 | 1991-04-23 | Saint-Gobain Vitrage | Apparatus for producing two dimensionally bent glass |
US5066321A (en) * | 1990-07-19 | 1991-11-19 | Glasstech, Inc. | Device for positioning hot glass sheets |
US5096478A (en) * | 1991-03-26 | 1992-03-17 | Glasstech, Inc. | Apparatus and method for conveying glass sheets |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5889010A (en) * | 1995-05-18 | 1999-03-30 | Pfizer Inc. | Benzimidazole derivatives having dopaminergic activity |
WO2022189747A1 (en) * | 2021-03-09 | 2022-09-15 | Saint-Gobain Glass France | Device for positioning glass sheets, facility for manufacturing glazing comprising such a device and method for automatically controlling the positioning of the glass sheets in such a facility |
Also Published As
Publication number | Publication date |
---|---|
AU7795194A (en) | 1995-04-03 |
JP3953095B2 (en) | 2007-08-01 |
EP0739315B1 (en) | 2000-04-12 |
KR960704812A (en) | 1996-10-09 |
AU697828B2 (en) | 1998-10-15 |
ATE191707T1 (en) | 2000-04-15 |
DE69423982D1 (en) | 2000-05-18 |
US5403369A (en) | 1995-04-04 |
FI961121A (en) | 1996-04-19 |
EP0739315A4 (en) | 1996-07-16 |
CA2171221A1 (en) | 1995-03-23 |
CA2171221C (en) | 2003-05-20 |
BR9407468A (en) | 1996-11-12 |
FI961121A0 (en) | 1996-03-11 |
EP0739315A1 (en) | 1996-10-30 |
JPH09502692A (en) | 1997-03-18 |
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