EP0267183A1 - Appareil de production de verre de securite lamine - Google Patents

Appareil de production de verre de securite lamine

Info

Publication number
EP0267183A1
EP0267183A1 EP19860903072 EP86903072A EP0267183A1 EP 0267183 A1 EP0267183 A1 EP 0267183A1 EP 19860903072 EP19860903072 EP 19860903072 EP 86903072 A EP86903072 A EP 86903072A EP 0267183 A1 EP0267183 A1 EP 0267183A1
Authority
EP
European Patent Office
Prior art keywords
oven
racks
rack
shelf
bottom wall
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Withdrawn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
EP19860903072
Other languages
German (de)
English (en)
Inventor
Harold E. Mckelvey
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 EP0267183A1 publication Critical patent/EP0267183A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/1088—Making laminated safety glass or glazing; Apparatus therefor by superposing a plurality of layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
    • B32B17/10825—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts
    • B32B17/10834—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid
    • B32B17/10844—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid
    • B32B17/10853—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid the membrane being bag-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
    • B32B17/10871—Making laminated safety glass or glazing; Apparatus therefor by pressing in combination with particular heat treatment

Definitions

  • the present invention relates to improved apparatus 5 for use in the production of laminated safety glass and, in particular, laminated automobile windshields, and the like.
  • Automobile windshields ordinarily consist of two sheets of glass and an interposed layer of a thermoplastic 0 material, such as polyvinyl butryal, bonded to one another by heat and pressure to form a composite unit.
  • the bonding is usually accomplished in a two-step operation by first subjecting the assembled laminations to a preliminary pressing to remove the air from between the laminations and
  • This invention is concerned with the so-called bagging method and has for its primary object the provision of improved apparatus for effecting the preliminary pressing of the glass-plastic assemblies preparatory to final compositing.
  • Another object of the invention is to provide an apparatus of the above character embodying a horizontally elongated heating oven and support racks for carrying the glass-plastic assemblies through said oven, characterized in that the heating oven and support racks are of novel construction, combination and arrangement to more effectively and efficiently perform the preliminary pressing operation.
  • Another object of the invention is to provide support racks of novel construction for supporting a plurality of glass-plastic assemblies under individual vacuum while being advanced through the heating oven.
  • a further object of the invention is to provide apparatus in which the heating oven and glass-plastic assembly support racks cooperate with one another to provide a substantially closed heating chamber through which the racks move.
  • Fig. 1A is a sectional view of a glass-plastic assembly
  • Fig. 1 is a top plan view of a heating oven constructed in accordance with the invention
  • Fig. 2 is a side view of the heating oven;
  • Fig. 3 is an end view of the heating oven;
  • Fig. 4 is a plan view of the heating oven including the means for advancing the support rack therethrough;
  • Fig. 5 is a transverse section taken substantially on line 5-5 of Fig. 4;
  • Fig. 6 is a side view of one of the support racks constructed in accordance with the invention
  • Fig. 7 is an end view of the support rack
  • Fig. 8 is a perspective view of one of the assembly support shelves
  • Fig. 9 is an end view of a portion of the rack and the means for moving the same through the heating oven; 5 Fig. 10 is a detail view of one of the spring latches; and
  • Fig. 11 is a detail section taken substantially on line 11-11 of Fig. 7.
  • a glass-plastic assembly representing an automobile windshield and composed of two sheets of glass 20 and 21 and an interposed layer 22 of a thermoplastic material
  • ⁇ j c such as polyvinyl butyral.
  • the three laminations 20, 21, and 22 are assembled by laying them freely one upon the other to form a sandwich which is then placed in a plastic vacuum bag 23 and the bag sealed. Prior to- sealing, however, a vacuum hose 24 is
  • the hose 24 is provided with a series of openings 25 and is connected to a source of vacuum through an outlet hose 26, as will be later described.
  • 25 glass-plastic assembly has been placed in the bag and the bag sealed, the bag is placed along with others, on a support rack and passed through a horizontally elongated heating oven to effect a preliminary bonding of the laminations.
  • the heating oven is generally designated by the letter A in Figs. 1, 2 and 3 and is composed of side walls 27 and 28, end walls 29 and 30, a top wall 31 and a bottom wall 32 which define the oven chamber. As shown in Figs. 3 and 5, the bottom wall 32 of the oven is spaced above the
  • 35 support floor 33 and is provided midway between the side walls 27 and 28 with a longitudinally extending slot 34 that extends throughout the length of the oven.
  • the end walls 29 and 30 are provided with vertical openings 35 and 36 that register with the slot 32 in the bottom wall and 5 constitute the entrance and exit openings repsectively of the oven. These openings are normally closed by suitable closure means, such as flexible vertical strips 37 (Fig. 3) of plastic, rubber, or the like, which permit passage of the racks carrying the glass-plastic assemblies 0 therethrough.
  • the oven A may be heated in any desired manner such as by steam heaters 38 positioned in alternate relation along the opposite side walls 27 and 28.
  • Each heater includes a radiator 39 and an electric fan 40 for 5 distributing the heat within the oven chamber.
  • Posts 40' are provided in the side walls of the oven to facilitate cooling of the electric fans 40.
  • a plurality of racks B, carrying the glass-plastic assemblies to be prepressed, are successively introduced o into the heating oven A through the entrance opening 35 therof and discharged therefrom through the exit opening 36.
  • the plastic interlayers 22 of the assemblies will be subjected to a temperature sufficient to bring about a softening of the thermoplastic 5 interlayers and superficial bonding of said interlayers to the glass sheets.
  • Each of the racks B (Figs. 6 and 7) comprises a horizontal base consisting of a rectangular supporting framework made up of side and end channel members 41 and 42 0 respectively supported by swivelled casters 43 at the four corners thereof. Carried by the supporting framework is a solid floor 44 which completes the base or bottom of the rack.
  • each rack is also provided with a plurality of horizontal shelves 49 positioned one above the other, each shelf being adapted to support one of the glass-plastic assemblies to be processed. While six shelves are shown, any desired number may be provided. As illustrated in Fig. 8 each shelf is made up of a three-sided frame composed of a side member 50 and transverse end members 51 and 52 secured to said side member by gussets 53 and 54. Extending between the end members 51 and 52 are metal bands 55 and 56 secured to said end members 51 and 52 by bolts or the like 57. Formed integral with the bands 44 and 56 are the spaced transverse strips 58 which form, with the bands
  • a metallic grid on which a glass-plastic assembly is freely supported is freely supported.
  • the grid is concavely curved to the same or approximately the same curvature as the assembly supported thereon.
  • the shelves 49 are pivotally carried by the vertical standards 45 and 46 and for this purpose there are secured to the opposite end members 51 and 52 of each shelf brackets 59 and 60 (Figs. 9 and 11) by screws or the like 61. Passing through each bracket and associated end member 51 or 52 is a stub shaft 62.
  • the stub shafts 62 at opposite ends of the shelf are aligned with one another but are offset with reference to the transverse center line of the shelf so that the shelf will normally fall to a horizontal position as shown in full lines in Fig. 7 where it will be supported by the vertical legs 66 carried by the end members 52 and 52 and which engage the corresponding end members of the next lower shelf.
  • each leg 66 When the shelf assumes its horizontal position, a foot 67 at the lower end of each leg 66 will engage a conventional spring latch 68 carried by the next lower shelf which will maintain the shelf in secured position until released. (Fig. 10)
  • the hoses 26 leading from the plastic bags 23 are each connected to a manifold 69 mounted vertically at one side of the rack.
  • the manifold is connected at its lower end by the pipe 70 to a motor 71 upon operation of which a vacuum will be created in the associated plastic bags to withdraw the air therefrom as well as from between the laminations.
  • the rack is advanced through the heating oven during which assemblies are heated to a temperature sufficient to soften the plastic interlayers and cause them to adhere to the glass sheets.
  • the vacuum in the bags is controlled by an individual valve 26' in each hose 26.
  • the oven is heated ' to a temperature of about 250°F. (121.1°C.) to about 350°F. (176.7°C.) and the racks remain in the oven from about seven to ten minutes.
  • the bottom wall 32 of the heating oven is spaced above the oven support floor 33 so that the floor 44 of each rack is substantially in line therewith and rides along the side rails 73 and 74.
  • the bottoms of the racks are recieved in the slot in the bottom wall of the oven and when the racks are moved through the oven in end-to-end abutting relation as indicated in Fig. 1, they completely close the slot 34 and cooperate with the bottom wall 32 of the oven to provide a substantially closed heating chamber C therein.
  • This is an important aspect of the invention in that it permits the vaccum motors 71 to be operated at a much lower temperature than would otherwise be the case.
  • the vacuum motors are located beneath the bottom wall of the oven and hence protected from the high heat in the over chamber. If this protection were not provided the operating life of the motors would be materially reduced.
  • the temperature within the oven chamber is maintained in the range of 250°F. (121.1°C.) to 350°F. (176.7°C).
  • the vacuum motors are preferably not operated at a temperature much in excess of 150°F. (65.6°C). Thus, their operating life is greatly increased.
  • means for supplying electrical energy to the motors 71 as the racks enter the oven for shutting off the motors as the racks leave the oven.
  • Such means includes a panel 101 positioned along side of the sprocket chain 76 and on which are mounted the three parallel bus bars 102, 103, and 104 that extend the length of the oven. Rolling contacts 105, 106, and 107 engage the bus bars 102, 103, and 104 respec ⁇ tively.
  • the contacts are contained in casings 108, 109, and 110 and are backed-up by springs 111, 112, and 113 res ⁇ pectively that maintain the associated contacts in engage ⁇ ment with the bus bars. Electrical energy is transmitted from the bus bars 102, 103, and 104 to the motor 71 through the wire connections 114, 115, and 116 respectively.
  • the motor 71 on each rack is automatically placed in operation as the contacts engage the bus bars to initiate the vacuum on the laminated assemblies and is automatically shut-off as the contacts pass beyond the bus bars as the rack leaves the oven to discontinue the vacuum.
  • a plurality of racks B carrying glass-plastic assemblies to be prepressed are successively introduced into the entrance end of the heating oven and advanced therethrough in end-to-end abutting relation by an endless sprocket chain 76 extending lengthwise of the oven and somewhat beyond the opposite ends thereof.
  • the sprocket chain 76 is located beneath the floor of the heating oven 5 (Fig. 5) in line with the slot therein and is trained at the opposite ends of its loop about sprockets 77 and 78.
  • the upper and lower flights of the sprocket chain ride along rails 79 and 80 respectively. Attached to the sprocket chain 76 at intervals along its length are pusher
  • IDC blocks or the like 83 that engage successive racks and advance them into and through the oven in time relations to the racks leaving the exit end thereof.
  • the sprocket chain 76 is driven by motor 84 through a gear reduction unit 85 and a chain and sprocket drive means
  • the sprocket 78 at the exit end of the oven is an idler sprocket.
  • a second sprocket Arranged along one side of the heating oven and parallel with the sprocket chain 76 is a second sprocket
  • the return sprocket chain 89 is trained at the opposite ends of its loop about sprockets 90 and 91 and is driven from a motor 92 through a gear reduction unit 93 and chain and sprocket means 94 including a drive shaft 95
  • the sprocket 91 is an idler sprocket.
  • Pusher blocks similar to pusher blocks 83, are also provided on the return sprocket chain 89 for advancing the racks forwardly during which travel they are guided by the side rails 96 and 97 (Fig. 5). During the return
  • a transfer means including a pallet 98 for receiving the
  • a second transfer means including a pallet 99 for receiving the racks from the return sprocket chain 89 and transferring them to a position in line with the entrance end of the oven.
  • the pallets 98 and 99 are each supported upon and moved transversely between their two positions by two series of rollers 100. The movement of the pallets along the rollers may be accomplished manually or by any suitable mechaxr ⁇ cal means.
  • loaded racks positioned on the pallet 99 at the entrance end of the heating oven, are moved therefrom into the oven in timed relation to the removal of the racks from the exit end thereof onto the pallet 98.
  • the bottoms of the racks are maintained in end-to-end abutting relations.
  • the bottoms of the racks are received in the slot 34 in the bottom wall of the oven with the side edges thereof riding along the said rails 73 and 74.
  • the racks are transferred by the pallet 98 to a position in line with the sprocket chain 89 and returned to the entrance end of the oven where the prepressed glass-plastic assemblies are removed and the racks reloaded with assemblied to be prepressed.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

Un four thermique rectangulaire (A), servant au prépressage de verre de sécurité où des assemblages de verre-plastique (20, 21, 22) sont scellés dans des sacs en plastique individuels (23), comprend une paroi de fond (32) pourvue d'une rainure s'étendant longitudinalement (34) et plusieurs râteliers portatifs (B) pourvus chacun d'une rainure (34) d'actionnement à base solide ménagée dans la paroi de fond du four et de plusieurs étagères horizontales (49) espacées l'une au-dessus de l'autre et destinées à soutenir des assemblages individuels, les étagères étant montées de façon pivotante et étant mobiles vers une position inclinée verticalement, afin de permettre le placement de l'un des assemblages sur l'étagère inférieure ou son retrait de ladite étagère. Chaque râtelier est équipé d'un dispositif servant à créer un vide (69, 70, 71) dans les sacs en plastique associés, afin de retirer l'air desdits sacs ainsi que de l'espace situé entre les strates. Des organes (73, 74, 76-78, 84-87) sont également prévus pour faire avancer les râteliers dans le four les uns après les autres selon une disposition en about permettant de fermer la rainure et créant dans le four (A) une chambre thermique essentiellement fermée.
EP19860903072 1986-04-28 1986-04-28 Appareil de production de verre de securite lamine Withdrawn EP0267183A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1986/000930 WO1987006526A1 (fr) 1986-04-28 1986-04-28 Appareil de production de verre de securite lamine

Publications (1)

Publication Number Publication Date
EP0267183A1 true EP0267183A1 (fr) 1988-05-18

Family

ID=22195480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860903072 Withdrawn EP0267183A1 (fr) 1986-04-28 1986-04-28 Appareil de production de verre de securite lamine

Country Status (2)

Country Link
EP (1) EP0267183A1 (fr)
WO (1) WO1987006526A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6497786B1 (en) 1997-11-06 2002-12-24 Nike, Inc. Methods and apparatus for bonding deformable materials having low deformation temperatures
US9277787B2 (en) 2013-03-15 2016-03-08 Nike, Inc. Microwave bonding of EVA and rubber items
US9781778B2 (en) 2013-03-15 2017-10-03 Nike, Inc. Customized microwaving energy distribution utilizing slotted wave guides

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB379324A (en) * 1931-04-27 1932-08-29 William Clark Bull Machine for fabricating laminated glass
US2063350A (en) * 1933-05-06 1936-12-08 American Window Glass Co Manufacture of laminated glass
US2054864A (en) * 1934-02-19 1936-09-22 Pittsburgh Plate Glass Co Apparatus for laminating glass
FR2102808A5 (en) * 1970-08-24 1972-04-07 Saint Gobain Pont A Mousson Two stage autoclave - for warm pressing glass/thermoplastic sheet assemblies
EP0162841A1 (fr) * 1983-11-29 1985-12-04 Shatterproof Glass Corporation Procede et dispositif de production de verre lamine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8706526A1 *

Also Published As

Publication number Publication date
WO1987006526A1 (fr) 1987-11-05

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