CN1187173A - Method of bending glass sheets - Google Patents
Method of bending glass sheets Download PDFInfo
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- CN1187173A CN1187173A CN96194619A CN96194619A CN1187173A CN 1187173 A CN1187173 A CN 1187173A CN 96194619 A CN96194619 A CN 96194619A CN 96194619 A CN96194619 A CN 96194619A CN 1187173 A CN1187173 A CN 1187173A
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- bending
- mold pressing
- glass
- sheet glass
- gravity
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- 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
- C03B23/0305—Press-bending accelerated by applying mechanical forces, e.g. inertia, weights or local forces
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- 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
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- 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
- C03B23/027—Re-forming glass sheets by bending by gravity with moulds having at least two upward pivotable mould sections
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- 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
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- 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)
- Refrigerator Housings (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
A method of bending glass sheets, the method comprising the steps of gravity bending a glass sheet at elevated temperature on a gravity bending mould in a gravity bending zone of a furnace, press bending the gravity bent glass sheet to a desired shape with an upper mould while the glass sheet is supported by the gravity bending mould as a lower mould in a press bending zone of the furnace and controlling the ambient temperature in the press bending zone thereby to control the cooling rate of the glass sheet in the press bending zone.
Description
The present invention relates to a kind of process for bending glass sheets, more particularly, is the bending glass sheet method of the mold pressing bending step of a kind of gravity-bending step that beginning arranged and back.This method is useful especially for crooked vehicle glass, and this glass is used for lamination subsequently, for example is used to make the windshield of automobile.
Be used for the glass for vehicle window of automobile common bending, sheet glass buckled by a bending operation.In a kind of such bending operation, flat sheet glass is placed in the ring mould of a spill, and is heated a glass softening point.Each sheet glass is crooked (sagging) under himself weight, up to the periphery of sheet glass with encircle mould and contact.This bending techniques is called " sagging " or gravity-bending, and it has developed for many years, with the activation bending glass sheet to satisfy the needs of automobile making.
For example, when needing the sheet glass of macrobending more, the ring mould is deformed, and it is by hinge the end of mould to be connected to its middle part, and along with softening and crooked the carrying out of glass, hinged mould ends or alar part are closed gradually.This has been avoided in the BENDING PROCESS sheet glass with respect to the tendency of mold-slide, thereby has prevented scratch.This mould is commonly referred to hinged mould.
Have been found that this gravity-bending technology is specially adapted to will to carry out subsequently the production of the glass of laminated--layer glass plate holder one intermediate layer material--.Gravity-bending technology can be produced the glass of high optical property, and they can simultaneously crooked two sheet glass, thereby produces the glass of coupling in pairs, can form good cooperation when lamination.
In recent years, the demand for development of vehicle design has the glass of complex curvatures, that is, and and at the glass of common mutual rectangular both direction bending.Only only may give sheet glass very limited complex curvatures by gravity-bending.
In addition, the use of automatic gear has increased in automobile making, and this requires glass will satisfy stricter tolerance of dimension.The edge shape of bending glass sheet must be accurately, and not only according to its bidimensional projection, and by its tripleplane, that is, the angle of glass must be correct near the edge.If " entering angle "--just as is known to the person skilled in the art--is incorrect, then Wan Qu window glass will be not can not cooperate well and seals with the bead of accepting of vehicle body.
In addition, the optical property of window depends on the shape at glass middle part, so, must control exactly, to reach desired optical standard.
Only can not satisfy above-mentioned requirements and carry out darker and the more requirement of complicated bend by the gravity-bending technology.Must finish the bending of this shape now by mold pressing bending step subsequently.This step can only relate to a limited area part of bending glass sheets, for example is contained near the part of the back vehicle body windshield pillar on the vehicle body.In present many vehicle design, this zone of window glass requires that darker bending is arranged, and in this manual, any zone that requires to carry out the window glass of darker bending by mold pressing bending step subsequently will be called as dark curved part.
In the mold pressing bending step, a patrix or pressing mold descend and are on the upper surface of sheet glass, so that by patrix sheet glass are pressed in the further bending glass sheet of effect on the counterdie.When carrying out the mold pressing bending step after the initial gravity-bending step, counterdie can comprise the gravity-bending mould.
US-A-4778507 discloses a kind of process for bending glass sheets, and wherein, the mold pressing bending step is carried out along with after the gravity-bending step.It discloses in the temperature range that the mold pressing district preferably remains on 500 °-660 ℃.Its time that also discloses mold pressing is preferably 0-60 second.It further discloses along with the mold pressing operation, and sheet glass progressively cools off with the typical rate of cooling of 20 °-200 ° of per minutes.The also relevant a kind of process for bending glass sheets of US-A-5071461, wherein, the temperature of crooked sheet glass to 550 °-650 ℃ is wanted in process furnace heating one.EP-A-0300416 discloses a kind of mold pressing bending in annealing furnace, wherein, one gravity-bending worker station remains in 621 °-638 ℃ the envrionment temperature, and in the crooked worker of the mold pressing in downstream station, add pressing mold and remain in the temperature with the approaching specified rising of the envrionment temperature at the crooked worker of mold pressing station.
GB-A-2063851 discloses a kind of process for bending glass sheets, and wherein, the envrionment temperature in gravity-bending district remains on 621 °-638 ℃, and the envrionment temperature of mold pressing buckled zone remains on about 582 ℃ temperature.
In aforementioned patent, disclose in some relevant temperature and the parameter of process period that are used for gravity-bending and subsequently mold pressing bending step, in controlled bending glass sheet method, also have needs, wherein, the initial gravity-bending of sheet glass and mold pressing bending energy subsequently carry out reliably, with production the sheet glass of dark curved part is arranged, it has reached the stress threshold value and the required optical characteristics of sheet glass of required maximum.In addition, in the technology of bending glass sheet method, still have needs,, this technology can be controlled reliably, so that when in the production stove, making, in final product, can reach required performance by selecting appropriate parameters.
The mold pressing bending also can be applicable to not have in the technology of bending glass sheet of initial gravity-bending.Yet this can cause a shortcoming, wherein, because curved profile is to realize by the one sheet glass of exerting pressure between two moulds of extruding, so, to compare with gravity-bending, the optics and the physicals of sheet glass have descended.And, in sheet glass, can produce stress, this can cause breaking, or requires an additional annealing steps to remove stress.So the apparatus and method that are used for mold pressing bending (promptly not following the gravity-bending step) separately are different with the apparatus and method of the mold pressing bending subsequently that is used to follow initial gravity-bending.
GB-A-2011377 discloses a kind of apparatus and method that are used for bending glass sheet, and wherein, a flat sheet glass is crooked between a punch on one and a lower cavity die.Last punch has the effective weight of a 200kg.The use of this big weight pressing mold can make at glass surface and leave a trace unintentionally, and produces stress in glass.
An object of the present invention is to provide a bending glass sheet method, wherein, operation can be controlled, so that can easily carry out this operation aborning, guarantees simultaneously to avoid staying undesirable vestige and produce stress in sheet glass in sheet glass.
Another object of the present invention provides a kind of bending glass sheet method, and it can control the mold pressing bending step, makes in the product of bending glass sheet, reaches high optical quality and low stress.
Another object of the present invention provides a kind of bending glass sheet method, and it can use the pressing mold lighter than prior art, thereby avoids leaving a trace unintentionally on sheet glass.
Another object of the present invention provides a kind of bending glass sheet method, wherein, by control process parameters, can use a pressing mold lighter than prior art.This has not only reduced on sheet glass to greatest extent leaves a trace, and operation can be controlled easily, thereby can by mistake not produce undesirable stress in glass.
The invention provides a kind of bending glass sheet method, comprise the following steps: on the gravity-bending mould in the gravity-bending district of baker with a temperature gravity bending glass sheets that raises, mold pressing buckled zone at baker, in by a gravity-bending die support sheet glass as counterdie, with a patrix sheet glass mold pressing of gravity-bending is bent to a desired shape, and the envrionment temperature of control mold pressing buckled zone, thereby in the rate of cooling of mold pressing buckled zone feed glass plate.
The present invention also provides a kind of mold pressing process for bending glass sheets, comprise the initial bending glass sheet that is contained on the hinged gravity-bending mould is provided, by pressing bending die to drop to the upper surface of sheet glass one patrix, the sheet glass mold pressing is bent to a final curved shape, and it is 50-150kg that patrix is pressed the net weight of bending die.
Present invention is described below by embodiment and with reference to accompanying drawing.
Fig. 1 is the schematic side sectional view of glass plate heating furnace, has shown a gravity-bending mould that a pair of flat glass plate is housed before the gravity-bending operation;
Fig. 2 is the side part sectional view of the amplification of one of wing plate securing device shown in Figure 1;
Fig. 3 is the schematic side phantom view of A-A line among Fig. 2;
Fig. 4 is the orthographic plan of a gravity-bending mould, and it is contained on the pedestal of carriage as shown in Figure 1;
Fig. 5 is the side part sectional view of the signal similar to Fig. 1, has shown the device that is used for the mold pressing bending glass sheet in stove, is the device before the mold pressing bending operation shown in the figure;
Fig. 6 has shown that the device among Fig. 5 is in the mold pressing bending operation;
Fig. 7 is the enlarged side view one of in the escapement shown in Fig. 6.
Fig. 8 is a graphic representation, represent before the mold pressing bending operation, during and the temperature variation of sheet glass afterwards.
With reference to Fig. 1, shown the cross section of a tunnel furnace 2, it is used for bending glass sheet, a pair of typically bending operation sheet glass 4 afterwards that is in, its preparation layer forces together, to produce for example windshield of automobile.This tunnel furnace is known in this area, comprises the guide rail 6 of an elongation, is loaded with the carriage 8 that open at a series of tops that wheel arranged on it.One gravity-bending ring mould 10 is arranged on each carriage 8, and mould 10 is contained on the pedestal 12 that is fixed in carriage 8 whole diapires 14.Carriage 8 also has preferably orthogonal sidewall 9 of an annular.Carriage 8 order is installed can be around a looped cycle motion that comprises stove 2.Loop comprises a glass loading area, and a heating zone is at this district heated glass plate gravity-bending on gravity-bending mould 10, a cooling zone and a glass unload zone.Stove 2 can also have other districts, and for example an annealed zone is used to make glass annealing, to reduce the stress that is produced in the bending step between heating zone and cooling zone.Though it will be understood by those skilled in the art that the present invention is is example with a box-type furnace, the present invention can also be used for the lehr of any other type.
The present invention be more particularly directed to the manufacturing of the sheet glass of macrobending part, it is difficult for realizing by independent use gravity-bending.According to the present invention, and then the downstream in the gravity-bending district of loop is provided with an additional mold pressing buckled zone.In the mold pressing buckled zone, when sheet glass is supported on the gravity-bending mould, by a top can be reciprocal mould, the sheet glass of gravity-bending is further bent to a final required shape.
Fig. 1 has shown the sheet glass 4 on the mould 10 of carriage 8, and it is before the gravity-bending operation.Carriage 8 is arranged along stove 2 and is moving with the rectangular direction of drawing.Mould 10 comprises the fixed mould part 16 of central authorities, and it is installed on the mold base 12 by a pack support 18.The wing plate part 20 that hinge is arranged in the articulated correspondence in both sides of the middle body 10 of mould 8.Though be to have described the gravity-bending of two opposed wings plate portions mould is arranged in the present invention, it will be understood by those skilled in the art that the gravity-bending mould that the present invention also can use only a hinge wing plate part.Wing plate part 20 is arranged can be at portion position (one or more flat glass plate 4 of mould 10 upper supports once, rotate as shown in Figure 1) and between the upper position (wing plate part 20 forms the annular lip of a successive bending with middle body 16, and it forms the last surface that sheet glass 4 will obtain when crooked).When sheet glass 4 during by the heating zone in the stove 2, it is heated, and makes sheet glass softening gradually, and sagging under action of gravity, so that the desired shape that limits with mould 10 is consistent.At the middle body 16 of mould, sheet glass 4 is sagging to be leaned against on the mould upper surface up to it, thereby consistent with desired shape.Above wing plate part 20, under the effect of the power that a pair of counterweight provided, the ramollescence of glass is upwards rotated wing plate part 20, the respective pivot 22 that each wing plate part 20 is wound connection section between middle body 16 and corresponding wing plate part 20 is pivoted, so that sheet glass 4 is upwards pushed away, and progressively crooked, lean against on the upper surface of wing plate part 20 up to the lower surface of sheet glass 4.As will be described, when dark curved part was arranged on sheet glass, these parts required by pressing mold or patrix it mechanically to be pressed against on the counterdie, so that can reliable and repeatedly be realized by the desired shape that counterdie limited.Obviously, the present invention can use what is called " imponderability " mould that does not have counterweight, but preferably its specified configuration makes along with softening of glass can be hinged at the effect bed die of its weight.
Show a typical mould 10 in greater detail at Fig. 4, mould 10 is contained on the pedestal 12 by support 18, and support 18 is fixed in mould 10 middle parts 16 downsides.Pedestal has enough rigidity, makes in the mold pressing buckling work of back the deflection degree minimum.Wing plate part 20 is connected in 16 both sides, middle part by corresponding pivot 22.The both sides of each wing plate part 20 are equipped with a pair of counterweight 24, and each counterweight 24 is contained on the respective arms 26 that is fixed in respective pivot 22 respective end 28.The downside of the upper surface contact glass plate 4 of the flange 30 of the mould 10 that forms by middle body 16 and wing plate part 20, and form the final desired shape of sheet glass 4.Preferably make the surf zone minimum of the mould 10 that contacts with sheet glass 4, so that reduce the heat passage zone of carrying out between sheet glass 4 and the metal die 10, and it can cause existing undesirable stress in last bending glass sheet 4 and/or in the marginal existence visible defects of sheet glass 4.This stress energy causes breaking of sheet glass 4.Typically, the stretch zones stress in the hope maintenance sheet glass is less than 7MPa.Typically, the ring edge 30 of the mould 10 that is formed by middle body 16 and wing plate part 20 upper surfaces has the thickness of an about 3-4mm, so that the contact area minimum between glass and the mould 10.Yet, according to the present invention, when gravity-bending mould 10 will be used as the counterdie of back mold pressing bending operation, just requiring counterdie that enough rigidity and intensity are arranged, so that pressing under the pressure effect of bending die from patrix, it can not produce uncontrollable skew and distortion.Its flange that yet requires to approach can not left a trace at the glass downside when the mold pressing bending operation.
According to the present invention, be specially adapted to the bending glass sheet device, so that allow in mold pressing bending operation subsequently, can use the common sag bent mould of thin annular lip, can keep that final curved glass panel products is had high quality control simultaneously.As mentioned above, this thin annular lip provides low stress in glass.Rest part to mould and device has some variations, realize final desired shape to guarantee mould reliably, mould can bear the mold pressing bending operation, and sheet glass can not leave a trace unintentionally because of additional mold pressing bending operation, or other quality change is arranged.
Refer again to Fig. 1, wing plate part 20 respectively has at least one securing device, with the position of vertical locking wing plate part in mold pressing bending operation process.Though in illustrated embodiment, only provide a securing device to each wing plate part 20, each wing plate part can at random have two securing devices.Securing device comprises a hinged disposition of latch arm 32, and it is articulated in corresponding wing plate part 20, and dangles downwards from it, thereby can slide on the end face of plate 34, and plate is contained in an epirelief wheel face is provided on the pedestal 12.
Disposition of latch arm 32/ plate 34 assemblies have been shown among Fig. 2 and 3 in detail.Disposition of latch arm 32 comprises the plate 36 at a pair of elongated interval, and its upper end is articulated on the extension 38 that is fixed in each wing plate part 20, and extension 38 passes between two plates 36, and is journaled between it, and comprises a bolt assembly 40.Disposition of latch arm 32 is dangled downwards from wing plate part 20, and it has a columniform distance piece 44 in bottom 42 freely, and it is fixed between two plates 36 by another bolt assembly 46.Cylindrical spacer 44 is clipped between the elongated plate 36, can prevent that it from relatively rotating.Another distance piece 48 and the thin part 50 of bolt are arranged at disposition of latch arm 32 middle parts.
Disposition of latch arm 32 freely pivots with respect to wing plate part 20 around extension 38, and on the upper surface of its lower surface 52 located plates 34, plate 34 comprises an elongated cam surface 54, can slide thereon in the free bottom 42 of disposition of latch arm 32.Cam surface 54 comprises the inclined ramp part 58 that the part 56 and of a basic horizontal is joined.Slideway part 58 is relative horizontal plane about 20 ° angle that tilts preferably, and if desired, approximate horizontal part 56 also with the relative horizontal plane of equidirectional of the slideway part 58 little angle that tilts a little.Plate 34 is installed on the pedestal 12 with a upright position adjustably by a mounting plate 60, and plate is removably to be fixed in mounting plate 60 by bolt assembly 62.The height of plate 34 and obliquity can easily be adjusted.
In Fig. 1, wing plate part 20 is the states that are in its decline, and in this position, disposition of latch arm 32 is inclined relative to horizontal, and is in a lockset position of coupler, and its free end 42 is on the ramp part 58 of cam surface 54 of plate 34.This position as shown in phantom in Figure 2.When the gravity-bending step, under the effect of counterweight 24, wing plate part 20 is upwards rotated, and makes along with sheet glass softening when heating, and sheet glass is progressively crooked.Wing plate part 20 moves to the position shown in the solid line from its position shown in dotted lines in Figure 2.Can see that when the gravity-bending step, along with the rising of wing plate part 20, the free end 42 of disposition of latch arm 32 upwards slides along ramp part 58, arrives approximate horizontal part 56 up to it, this horizontal component forms a blocked region 64 to disposition of latch arm 32.Disposition of latch arm 32 one with pivot 22 vertical planes in move.As shown in Figure 4, the plate 34 that forms cam surface 54 is perpendicular to corresponding pivot 22, so that along with wing plate part 20 is upwards rotated around corresponding pivot 22, make the particularly lower surface 52--slip on ramp part 58 stably of distance piece 44 of free end 42--of disposition of latch arm 32, vertical substantially up to disposition of latch arm 32, its free end 42 is contacted with blocked region 64 and locate.As shown in Figure 2, can be by mistake laterally move and leave cam surface 54 in order to guarantee disposition of latch arm 32, a steel wire 66 can be provided, its two ends 68 be connected in the two ends 70 of plate 34, and pass between the plate 36 at interval of disposition of latch arm 32.
As shown in Figure 2, disposition of latch arm 32 is vertical substantially at its locked position of coupler.Best, the height of plate 34 and obliquity are adjusted and make in locked position of coupler disposition of latch arm 32 is not very vertical, but with respect to the little angle that vertically tilts slightly, the inclination of this inclination and lockset position of coupler is same direction.At locked position of coupler, the cam surface 54 of the lower surface 52 of Ke Zhuandong distance piece 44 and degating region 64 is not for being frictionally engaged.During mold pressing bending subsequently, because degating region 64 is level substantially, and disposition of latch arm 32 is vertical substantially, the turned position that makes progress in wing plate part 20, one downward pressure is applied on the wing plate part 20, one corresponding power is transmitted downwards by disposition of latch arm 32, and is delivered to pedestal 12 by plate 34 and the mounting plate 60 that plate 34 is housed therefrom.This downward pressure on wing plate part 20 transmits with the downward deflection or the distortion of wing plate part 20 minimums.As the result who engages between the degating region 64 of disposition of latch arm 32 and cam surface 54,32 pairs of wing plate parts of disposition of latch arm 20 form the pillar of an inflexible and locking.This makes the hinged mould that can use thin annular lip 30 in mold pressing bending operation subsequently.
Be appreciated that and require the operator when the device cooling, to adjust disposition of latch arm 32/ plate 43 assemblies.Yet device is requirement temperature with a rising in stove, for example with about 600-650 ℃, operates satisfactorily and reliably.The expansion of each parts of device when initial adjustment must be considered to heat, and the distortion a little of the mechanical part that caused of long-time thermal cycling and mechanical wear.Obviously, advantageous device can easily be adjusted by the operator.So it is not vertical fully in the mold pressing bending step that the configuration of disposition of latch arm 32/ plate 34 preferably makes disposition of latch arm 32.Even this has guaranteed to have taken place distortion and wearing and tearing, disposition of latch arm 32 can not rotated by its vertical position and the end 70 that slides off plate 34 yet.This additionally allows after having passed through a large amount of thermal cyclings, and the scope of a potential locked position of coupler that forms along degating region 56 is arranged, height (with respect to the pedestal 12) scope that changes a little of the wing plate part 20 that it is attached thereto corresponding to disposition of latch arm 32.This can easily compensate any distortion and the wearing and tearing that produced by the successive thermal cycling.The height of final angle position and wing plate part 20 is equipped with counterweight 24 by the restriction of the retainer on the arm 26 on the arm, it defines the final position corresponding to the mould of the final desired shape of sheet glass.Yet, because the result of thermal cycling, wing plate part 20 may change slightly with respect to the height of pedestal 12, and the existence of a locking scope has guaranteed that disposition of latch arm wing plate part 20 to mould 10 when the mold pressing bending operation works as a pillar, and no matter this thermal cycling that causes that not disposition of latch arm 32 final angle positions change is a little arranged.This has just been avoided wanting running check and has adjusted securing device.Best, degating region 56 is inclined upwardly slightly, thereby allows the free end 42 of disposition of latch arm 32 to slide stably along the camming action of cam surface 54 is caused.By adjusting height and the orientation of plate 34 with respect to pedestal 12 (so and with respect to the disposition of latch arm 32 on the corresponding wing plate part 20), can be only with manually just easily adjusting disposition of latch arm 32/ plate 34 assemblies.
Shown among Fig. 5 mould 10 after the gravity-bending operation with the mold pressing bending operation before final form.
Though the embodiment shown in Fig. 1-4 has shown a disposition of latch arm only is housed on each wing plate part 20, if required, on each wing plate part, also two or more disposition of latch arm can be housed.After the mold pressing bending operation that will describe in the back, with unloading area takes off the sheet glass of mold pressing bending from mould after, can inwardly push away disposition of latch arm 32 with hand by the operator wing plate part is adjusted to initial lower curtate position again, and be in state shown in dotted lines in Figure 2.If necessary, available one for example mechanical manipulator automatically carry out described operation.
With reference to Fig. 5, shown that one is arranged in the mold pressing bending apparatus of tunnel furnace 2 mold pressing buckled zones, be designated as 72 usually, shown mold pressing bending apparatus 72 is before the mold pressing bending operation.In the mold pressing buckled zone, be equipped with in the carriage 8 of mould 10 gravity bending glass sheets 4 is housed, wing plate part 20 is in its position of upwards rotating, and disposition of latch arm 32 is in its vertical substantially position, and be bearing in downwards on respective plate 34 upper surfaces, as previously mentioned, carriage 8 is transported to a preset position, at this device, sheet glass 4 is positioned so that is in below the mold pressing bending apparatus 72.When the bending of finishing sheet glass 4 when hope reaches its desired shape, carry out the mold pressing buckling work, the shape that makes the final bending glass sheet 4 that produced have gravity-bending mould 10 to be limited.
Mold pressing bending apparatus 72 comprises a patrix or pressing mold 74, and it has a counterdie surface 76, and it constitutes a convex mould surface, corresponds essentially to the die surface that is formed by gravity-bending mould 10.Sheet glass 4 will carry out the mold pressing bending between patrix 74 and gravity-bending mould 10, so that obtains required shape.Patrix 74 preferably includes a ceramic body.As shown in Figure 5, patrix 74 can comprise a non-detachable mold.Yet in another structure, patrix 74 can comprise a pair of module that separates, and its needs that are arranged to only to be pressed against sheet glass 4 carry out dark crooked part, that is, and and near wing plate part 20.
Patrix 74 is by 78 supportings of one pair of frame.Paying frame 78 dangles downwards from resting support 80 by one group of chain 82.4 chains 82 are preferably arranged, and it is each positioned at the bight of the correspondence of patrix 74.Chain can be replaced by metallic cable.The upper surface 84 of resting support 80 connects a steel cable (or chain) 86, it extends upward from resting support 80 middle parts, pass the top 87 of stove 2, walk around first pulley 88 and be the approximate horizontal shape, walking around second pulley 90 dangles vertically downward, the end of steel cable 86 is connected in first counterweight 92, and counterweight is connected in pressing mold travel mechanism 94.Counterweight 92 and pressing mold running gear 94 be transverse orientation near tunnel furnace 2 vertical the same sides.Pressing mold travel mechanism 94 preferably includes hydraulic pressure or pneumaticpiston/cylinder component, and its bottom is connected in floor 96.In Fig. 5, patrix 74 is in the state of rise, and piston/cylinder-assemblies 94 is in the position of withdrawal.Before mold pressing bending operation subsequently, at the raised position of patrix 74, carriage 8 can move to the position of patrix 74 belows from the upstream portion of tunnel furnace 2.Counterweight 92 has a required weight, make when patrix 74 liftings, the merit minimum that piston/cylinder-assemblies 94 is consumed, but to following condition: under the situation that piston/cylinder-assemblies 94 lost efficacy, the weight of first counterweight 92 is sufficiently high, make whole device that fail-safe be arranged, be pulled upwardly upper die component 74 from the carriage 8 of following process with activation.
One second balance weight assembly also is provided, when mold pressing bending step patrix 74 can be located on the sheet glass 4 with a predetermined net weight.One inflexible metallic rod 98 extends upward from upper surface 100 middle parts of paying frame 78 of patrix 74.One second steel cable 102 is connected in the top of bar 98, and order extends through hole (not shown) on resting support 80 and the furnace roof, and walks around a pair of pulley 104,106 therefrom, make the other end be connected in one can free vertical shifting second counterweight 108.If desired, can provide vertical guideway or support (not shown), to prevent their sidewise movements by mistake to first and second counterweights 92 and 108.Second counterweight 108 has a specific weight, and it is chosen as can provide a predetermined net weight to patrix 74 and the subassembly of paying frame 78 that patrix is housed.According to the desired shape of specific mould structure and size and bending glass sheet, the net weight of upper die component is typically from 50-100kg.Steel cable 102 between second counterweight 108 and patrix 74 is tension always.One metallic rod 98 is between steel cable 102 and pair frame 78, and with the elongation unintentionally or the distortion of near the steel cable 102 the minimizing patrix 74, because at pressing section, outside temperature is high.Steel cable 86 between the erecting frame 80 and first counterweight 92 is tension always also.As described below, during the mold pressing bending step, allow chain lax, so that during the mold pressing bending operation, being applied on sheet glass 4 upper surfaces only is the net weight of patrix 74 and the associated selection of paying frame 78.
One group of escapement 109 is arranged near the both sides of patrix 74.Escapement 109 respectively comprises retainer 110 on, comprises a vertical body 112, and its bottom is fixed on the plate 114 of an approximate horizontal.Last retainer 110 is fixedly mounted in to be paid on the frame 78.The following retainer 116 of one group of correspondence of escapement is contained on the pedestal 12.Each time retainer 116 comprises a upwardly extending body 118, and a vertical adjustable distance piece 120 is equipped with in its upper end.As showing in greater detail among Fig. 7, each distance piece 120 comprises a bolt part 122, and it has one to be roughly hemispheric top domed head 124, and its upper surface is arranged on the lower surface 126 that leans against retainer 110 boards 114 on the correspondence during the mold pressing bending operation.Bolt part 122 is screwed in the upwardly extending body 118, easily adjusts height with activation, and a nut 128 is provided, and with activation top domed head 124 is fixed on desired height.Best, board 114 and top domed head 124 are made of steel.Upper and lower retainer 110 and 116 aligns in couples.Best, three pairs of retainers 110,116 are provided.As shown in Figure 4, adopt this layout, two couple in the retainer 110,116 is positioned on the long limit 117 of mould 10 spaced reciprocally, the 3rd pair of middle part that is positioned at mould 10 another long limits 119.
Be appreciated that in typical tunnel furnace 2 one group of carriage 8 is provided, and it respectively is equipped with a corresponding gravity-bending mould 10.One typical stove 2 comprises at least 20 carriages 8/ gravity-bending mould 10 assemblies.Yet, only provide a mold pressing crooked patrix 74.In operation, each carriage 8 that gravity-bending mould 10 is relevant with it down must press bending die 74 to carry out suitable adjustment with respect to single patrix.So, provide the escapement 109 that is used to limit correct adjustable gap between the mould 10,74 with each corresponding gravity-bending mould 10, each gravity-bending mould 10 can be adjusted individually, and with single patrix 74 proper operations.Before initial furnace maneuver, each escapement 109 is adjusted separately, so that in the mold pressing bending operation, when patrix drops on for 74 times on the sheet glass 4 that is contained on the gravity-bending mould 10, the correct mutually distance corresponding to sheet glass 4 last curve form thickness at interval of upper and lower mould 74,10.
Below with reference to Fig. 6 the mold pressing bending operation is described.When the counterdie 10 that sheet glass 4 is housed was in patrix 74 belows, piston/cylinder-assemblies 94 was activated, and the resting support 80 of supporting patrix 74 is descended, and contacted with sheet glass 4 on the following gravity-bending mould 10 up to patrix 74.The stroke of piston/cylinder-assemblies 94 is greater than just making patrix 74 contact desired stroke with sheet glass 4.So resting support 80 excess of stroke move, so that it can descend with also continuing after sheet glass 4 contacts at patrix 74, and resting support 80 has been dropped to than more approach to pay a frame 78 at starting position shown in Figure 5.The excessive decline of resting support 80 makes chain 82 lax.In this position, the frame 78 of paying that patrix 74 is relevant with it is bearing in downwards on the sheet glass 4 with required net weight, and this net weight is definite by the specified weight of suitable selection second counterweight 108.So patrix 74 is pressed on the upper surface of sheet glass 4 with a predetermined net weight.
In addition, during the mold pressing bending operation because patrix 74 at least towards the terminal point of mold pressing bending operation not from last surface bearing, the weight of patrix 74 patrix 74 and below the entire contact surface of sheet glass 4--typically at an about 1m
2Area--on issue distribution equably.This has just guaranteed that in the mold pressing bending operation uniform weight distribution is arranged on sheet glass 4.The mold pressing bending operation typically continues nearly 20 seconds, more typically is 5-15 second, typically is 10-15 second most.Towards the terminal point of mold pressing bending operation (wherein, patrix 74 has been pressed into sheet glass closely with following gravity-bending mould 10 around its whole edge and has contacted), for each escapement 109, top domed head 124 rests on the plate 114, thereby at upper and lower mould 74, the pre-adjust the play of the whole area of mold pressing bending die is passed in formation one substantially between 10, and this gap is corresponding to the thickness of mold pressing bending glass sheet.The existence of retainer has guaranteed can not occur the overvoltage to sheet glass 4 during the mold pressing bending operation.The vestige minimum that this makes gravity-bending mould 10 annular lip 30 form at sheet glass 4 lower surfaces, and this is a special problem when using the gravity-bending mould that about 3-4mm thin thickness flange is arranged.
The method of most preferred embodiment according to the present invention, in the mold pressing bending step, its processing parameter, for example, temperature, time or the like, and mechanism, particularly descend the shape of gravity-bending mould and the shape and the net weight of last bending mould to coordinate, so that an improvement above prior art to be provided.Its improvement has proved that not only the mold pressing bending step is had better controllability, and has potential to improve in the quality product of being produced by the glass bending method.
Fig. 8 has shown among embodiment of glass bending method of the present invention and has typically concerned between the temperature and time.In Fig. 8 with the description of the relevant glass sheet temperatures of back in, be appreciated that the temperature of being mentioned is meant that sheet glass will carry out the temperature of dark crooked those parts by the mold pressing bending method of back.This means that the temperature of whole sheet glass is lower than the specified temp of those parts that will carry out dark bending.The structure of heating zone enables easily to realize--for example passing through local heating--temperature distribution on glass sheet areas.In a most preferred embodiment, before the mold pressing bending operation, can heat following sheet glass 4 by a top heater, thereby on the surface of sheet glass 4, provide a temperature difference to distribute, can during the mold pressing bending operation, assist sheet glass 4 to obtain a required shape.This partial top heating technique is disclosed among the european patent application NO.94309435.9.
As can see from Figure 8, variation of temperature generally has three continuous stages: (a) in the gravity-bending district of the upstream of baker sheet glass is carried out gravity-bending, (b) carried out the sheet glass of gravity-bending in the mold pressing buckled zone mold pressing bending in the downstream of baker, (c) at the cooling zone cooled glass plate in the more downstream of baker.In the gravity-bending district, the temperature of sheet glass has increased in the gravity-bending step, and along with the sheet glass of gravity-bending leaves the gravity-bending district, the highest Tmax of temperature of the part that carry out dark bending of sheet glass.To the shape of any specific bending glass sheet, the value of Tmax is in the small range, and for the composition and the thickness of any given sheet glass, above-mentioned scope is determined by the complicacy of glass sheet shape.Typically, when sheet glass left from the gravity-bending district, the dark curved part of sheet glass was in about 625 °-640 ℃ temperature T max.
The temperature requirement of the sheet glass in the gravity-bending district is sufficiently high, and is sufficiently low with the viscosity that guarantees sheet glass, makes glass sagging and correctly enter its desired shape.Yet,, will reduce the optical quality of the product of producing if temperature is too high.Typically, the envrionment temperature in the gravity-bending district is about 650 ℃.
Along with sheet glass enters the mold pressing buckled zone, sheet glass begins to cool down immediately, as shown in Figure 8.The method according to this invention, the rate of cooling Be Controlled of the sheet glass in the mold pressing buckled zone is to remain on a lower value.Be present in the mold pressing buckled zone after for some time (in the meantime at sheet glass, sheet glass has been positioned at patrix and has pressed under the bending die 74, and mould 74 has descended and has contacted with the upper surface of sheet glass, is called as boot time t-draw during this), the mold pressing bending operation begins.The mold pressing bending operation continues for some time t-press, and as shown in Figure 8, after this, pressing mold takes off from sheet glass.Boot time was determined by the time that mechanical transmission system that is used for die (it guarantees the position that sheet glass moves away the gravity-bending district and enters the patrix below) and last modulo operation begin.
Envrionment temperature Be Controlled in the mold pressing buckled zone makes it higher, typically is 500 °-600 ℃, more typically is 550 °-580 ℃.This makes with the use of the low ambient temperature of mold pressing buckled zone and compares, and it can controllably suppress the rate of cooling of sheet glass.For the part that requires the mold pressing bending of sheet glass, the mold pressing bending operation can carry out on optimum ground in a higher temperature range.For example, in Fig. 8, the mold pressing bending begins at a temperature T start, and stops at a lower temperature T stop.During the mold pressing bending, the instantaneous stress that sheet glass is molded and produces in the crooked temperature range feed glass plate.If the mold pressing bending is carried out under a higher glass temperature, then glass tends to the more soft easier release of any stress that is produced in the sheet glass during the mold pressing bending operation, and this is because the stress relief time coefficient is shorter when high temperature.So according to most preferred embodiment of the present invention, in the mold pressing buckled zone, the mold pressing bending step is carried out under a higher mold pressing flexure temperature.When pressing mold during from glass taking off, because instantaneous mold pressing stress is released, so sheet glass can keep its required shape, and glass temperature fully reduces, so further gravity-bending can not take place.
The glass sheet temperatures of having relatively high expectations during the mold pressing bending will cause the problem of controllability potentially, this is because after it leaves the gravity-bending district, need carry out the mold pressing bending glass sheet of back, so that sheet glass also is not cooled under the best mold pressing flexure temperature zone at once.Yet higher by the envrionment temperature that remains on the mold pressing buckled zone, the rate of cooling of sheet glass has been suppressed, thereby and the time window of a broad is provided, therein, the mold pressing bending operation can carry out satisfactorily.So the beginning in that sheet glass enters the mold pressing buckled zone by the rate of cooling of feed glass plate, can provide the controllability of an improved mold pressing bending operation, this is because the mold pressing bending operation degree of freedom in time that will carry out is bigger.In addition, during the mold pressing bending, there is a higher temperature can make glass by bending more slowly in the mode of time control.This is best, because use slower mold pressing bending step to be easy to produce less instantaneous mold pressing stress in sheet glass.Typically, the clamping cycle between t-start and t-stop lasts up to 20 seconds, 10-15 second preferably, as shown in Figure 8.
Compare with the device that typically is used for the mold pressing bending, the device that is used for long clamping cycle can use a lighter pressing mold.Typically, the molding pressure load that is applied by patrix is 100 ± 50kg, more typically is 50-100kg.Molding pressure load is selected according to the desired shape of specific mold shape and size and bending glass sheet.Use lighter molding pressure load to reduce the breakage rate of sheet glass, with the instantaneous mold pressing stress that in sheet glass, produces, also reduced the tendency that mould is left a trace, particularly counterdie on sheet glass--when counterdie comprises a common gravity-bending mould (it has just like preceding described best thickness is the thin annular lip of 3-4mm).Compare with using heavy load (it typically is used for known mold pressing bending apparatus), a light molding pressure load has also reduced the wearing and tearing and the maintenance of instrument.
After the mold pressing bending step, at the mold pressing buckled zone, sheet glass cools off continuously with a controllable mode.Rate of cooling after the higher envrionment temperature of mold pressing buckled zone maintenance has been controlled the mold pressing bending, make in successive cooling period, sheet glass remains on an abundant high temperature, make any stress that during the mold pressing bending operation, in sheet glass, produces unintentionally obtain discharging, and make sheet glass annealing.Residual regional stress in the cooling energy feed glass plate of this control particularly at the edge of sheet glass, can make last layered product satisfy the requirement of motor vehicle manufacturers.
Best, in the mold pressing buckled zone, the average rate of cooling of sheet glass is preferably 30 ℃ of about per minutes less than 50 ℃ of per minutes, 10 °-20 ℃ of more preferably about per minutes.By use high envrionment temperature in the mold pressing buckled zone, the rate of cooling that suppresses in the mold pressing buckled zone has been loosened the timing requirement in the mold pressing bending operation and has been loosened the speed that the mold pressing bending operation begins and carries out.This also can make sheet glass take out from the gravity-bending stove with the lower temperature of a dark curved part, this temperature is for example in 625 °-640 ℃ scope, otherwise will require to keep a specific mold pressing flexure temperature scope and not use the cooling range of an inhibition, so the above-mentioned optical property that can improve sheet glass.Can use a lighter pressing mold to loosening of timing requirement, this can improve the physics and the optical property of resulting mold pressing bending glass sheet.
Then, sheet glass is taken out from the mold pressing buckled zone, deliver to the cooling zone, wherein, sheet glass can be one than rate of cooling cooling higher in the mold pressing buckled zone.If desired, can be by the rate of cooling in the low-level radiation heating controlled chilling district.The rate of cooling Be Controlled makes any regional stress that produces in the sheet glass and toughness stress within the limits prescribed.Yet, in case sheet glass is lower than about 500 ℃--this strain point than glass is lower, and rate of cooling can be higher and can not produce undesirable stress in sheet glass.
According to the best approach of the present invention, the surrounding temperature in the mold pressing buckled zone can remain on a high level.So this provides a higher working temperature to patrix, and patrix do not needed the heating unit that provides independent.This make it to have reduce the patrix prime cost advantage.
In gravity-bending baker and mold pressing buckled zone, control surrounding temperature in a known mode.For example by a warm air burner or a radiation heater.In the cooling zone, can use known cooling structure, black surface for example can be arranged with the radiation of reception, and air flowing be arranged, so that remove heat from the cooling zone in the furnace roof back from the cooled glass plate.
Referring to Fig. 6, escapement 109 quilts are configuration distinguishingly again, to adapt to the variation of patrix 74 and counterdie 10 horizontal positions, because engage with plate in the scope of selecting of the horizontal position that top domed head 124 can center at the area by plate 114.This makes mould interval exactly, although the position of one group of gravity-bending mould 10 of the Qu Huanlu that goes for a stroll has variation.Thisly do not limit patrix 74 localized horizontal degree of freedom during being arranged in the mold pressing bending.
Require patrix 74 to locate exactly with respect to each of the one group of gravity-bending mould 10 that is arranged in the whole loop that comprises baker.In fact, the turned position of the level of each gravity-bending mould 10 and vertical translation position and level and swing is not only along with the initial unlatching--but also particularly after operation of baker--of baker changes to another carriage from a carriage.This is because the wearing and tearing of thermal expansion that thermal cycling causes or distortion and device, for example wearing and tearing of carriage wheel on guide rail.
Because during the mold pressing bending operation, patrix 74 can be located in the gravity-bending shape of sheet glass 4, to its side direction or banking motion without any constraint, patrix 74 can easily find its tram, and carry out mold pressing bending accurately with respect to following sheet glass 4, and with irrelevant with respect to the change in location of patrix 74 from the sheet glass 4 to another gravity-bending mould 10.During the mold pressing bending operation, the existence of the freedom of motion of patrix 74 has guaranteed accurately to carry out the mold pressing bending, and and under one group the change in location between the gravity-bending mould irrelevant.Patrix 74 by flexible member for example the suspention of chain 82 allow this unconfined motion.
In addition, patrix 74 is by chain 82 supporting, contacts with following sheet glass 4 thereby patrix 74 can rotate a little scope a little.Contact because patrix can be step by step enters with following sheet glass 4, and make the pressurization of following sheet glass 4 by progressively form required shape.Best, patrix 74 rolls on the upper glass surface, thereby at first forms dark curved part by patrix 74.
Because retainer is arranged--wherein descend retainer to comprise a hemispherical dome, last retainer comprises that a dome leans on flat board thereon, just can guarantee the relative vertical position of upper die and lower die reliably, thereby make the vestige minimum that on sheet glass, forms unintentionally by gravity-bending mould 10.Yet this can be implemented, and can not eliminate or reduce patrix 74 with respect to counterdie 10 and sheet glass 4 ability with a unconfined mode lateral translation and rotation and vertical tilt during the mold pressing bending operation.
The present invention can make the sheet glass of the little curved part to 150mm of radius.The minimum radius of 1000mm when the minimum radius of the 450mm when this can be with the gravity-bending that adopts the sheet glass local heating and the gravity-bending of no local heating is compared.
The present invention can make the sheet glass of dark curved part, its rim stress can with use comparing that common sag bent technology reached.The present invention typically can make the bending glass sheet of manufacturing that edge tensile stress less than 7MPa is arranged.This can make sheet glass be bent, and after the mold pressing bending operation, does not require that annealing subsequently eliminates stress.
Claims (22)
1. bending glass sheet method, comprise the following steps: on the gravity-bending mould in the gravity-bending district of baker with a temperature gravity bending glass sheets that raises, mold pressing buckled zone at baker, in by a gravity-bending die support sheet glass as counterdie, with a patrix sheet glass mold pressing of gravity-bending is bent to a desired shape, and the envrionment temperature of control mold pressing buckled zone, thereby in the rate of cooling of mold pressing buckled zone feed glass plate.
2. the method for claim 1 is characterized in that: the envrionment temperature of control mold pressing buckled zone is in 500 °-600 ℃ the scope.
3. method as claimed in claim 2 is characterized in that: the envrionment temperature of control mold pressing buckled zone is in 550 °-580 ℃ the scope.
4. as arbitrary described method among the claim 1-3, it is characterized in that: the rate of cooling at the sheet glass of mold pressing buckled zone is controlled to up to 50 ℃ of per minutes.
5. method as claimed in claim 4 is characterized in that: the rate of cooling at the sheet glass of mold pressing buckled zone is controlled to up to 30 ℃ of per minutes.
6. method as claimed in claim 5 is characterized in that: the rate of cooling at the sheet glass of mold pressing buckled zone is controlled to 10 °-20 ℃ of per minutes.
7. arbitrary described method in the claim as described above, it is characterized in that: the mold pressing bending step reaches 20 seconds time.
8. method as claimed in claim 7 is characterized in that: the mold pressing bending step is carried out the 5-15 time of second.
9. method as claimed in claim 8 is characterized in that: the mold pressing bending step is carried out the 10-15 time of second.
10. arbitrary described method in the claim as described above, it is characterized in that: patrix applies the molding pressure load of 50-150kg to the upper surface of sheet glass.
11. method as claimed in claim 10 is characterized in that: patrix applies the molding pressure load of 50-100kg to the upper surface of sheet glass.
12. arbitrary described method in the claim as described above is characterized in that: during the mold pressing bending step, patrix is still on the sheet glass with a selected net weight.
13. arbitrary described method in the claim as described above, it is characterized in that: patrix is suitable for descending in the upper surface of sheet glass by a suspension, and the structure of suspension system allows patrix to make side direction and banking motion with respect to the gravity-bending mould that sheet glass is housed.
14. arbitrary described method in the claim as described above, it is characterized in that: in the terminal of mold pressing bending step, by one group of escapement patrix and gravity-bending mould are spaced from each other a selected distance, the structure of escapement makes patrix do sidewise movement with respect to the gravity-bending mould.
15. arbitrary described method in the claim as described above is characterized in that: when the gravity-bending district enters the mold pressing buckled zone, the temperature that will carry out crooked part on the sheet glass is 625 °-640 ℃.
16. arbitrary described method in the claim as described above, it is characterized in that: the gravity-bending mould comprises a hinged mould, and it has an annular lip by the bending glass sheet lower surface, and the thickness of annular lip is 3-4mm.
17. mold pressing process for bending glass sheets, comprise the initial bending glass sheet that is contained on the hinged gravity-bending mould is provided, by pressing bending die to drop to the upper surface of sheet glass one patrix, the sheet glass mold pressing is bent to a final curved shape, and it is 50-150kg that patrix is pressed the net weight of bending die.
18. method as claimed in claim 17 is characterized in that: the mold pressing bending is carried out under 500 °-600 ℃ envrionment temperature.
19, method as claimed in claim 18 is characterized in that: the mold pressing bending is carried out under 550 °-580 ℃ envrionment temperature.
20. as arbitrary described method among the claim 17-19, it is characterized in that: the mold pressing bending step is carried out the 5-15 time of second.
21. by the bending glass sheet that method arbitrary in the aforementioned claim is produced, the maximum tension regional stress of sheet glass is less than 7MPa.
22. the use of the mold pressing buckled zone of a glass bending baker, this district is positioned at the downstream in the gravity-bending district of baker, and its envrionment temperature is 500 °-600 ℃, with the rate of cooling of the sheet glass of control mold pressing buckled zone in scope up to 50 ℃ of per minutes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9511555.6 | 1995-06-07 | ||
| GBGB9511555.6A GB9511555D0 (en) | 1995-06-07 | 1995-06-07 | Method of bending glass sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1187173A true CN1187173A (en) | 1998-07-08 |
| CN1144763C CN1144763C (en) | 2004-04-07 |
Family
ID=10775689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB961946199A Expired - Fee Related CN1144763C (en) | 1995-06-07 | 1996-05-01 | Method of bending glass sheets |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JP4264132B2 (en) |
| KR (1) | KR100355917B1 (en) |
| CN (1) | CN1144763C (en) |
| AR (1) | AR002367A1 (en) |
| BR (1) | BR9609409A (en) |
| DE (1) | DE69601267T2 (en) |
| TR (1) | TR199701523T1 (en) |
| TW (1) | TW432022B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103517882A (en) * | 2011-05-05 | 2014-01-15 | 康宁股份有限公司 | Methods and apparatus for reforming a glass sheet |
| CN109041574A (en) * | 2017-04-10 | 2018-12-18 | 法国圣戈班玻璃厂 | For making the curved gravity bending moulds with curved bearing surface of glass disc |
| CN109896730A (en) * | 2017-12-07 | 2019-06-18 | 蓝思科技（长沙）有限公司 | A kind of glass bending forming method and device |
| CN110621626A (en) * | 2018-04-16 | 2019-12-27 | 法国圣戈班玻璃厂 | Support for gravity bending of glass |
| CN110650926A (en) * | 2018-04-27 | 2020-01-03 | 法国圣戈班玻璃厂 | Symmetrical bending |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4557606B2 (en) * | 2004-06-01 | 2010-10-06 | 日本板硝子株式会社 | Folded glass plate |
| JP4819427B2 (en) | 2005-07-15 | 2011-11-24 | 株式会社リコー | Image forming apparatus, image forming method, and process cartridge |
| JP4590344B2 (en) | 2005-11-21 | 2010-12-01 | 株式会社リコー | Electrostatic latent image carrier, image forming apparatus using the same, process cartridge, and image forming method |
| US9206067B2 (en) * | 2013-03-12 | 2015-12-08 | Glasstech, Inc. | Glass sheet support structure |
| BR112020022238A2 (en) * | 2018-10-31 | 2021-06-08 | Saint-Gobain Glass France | method and device for bending sheets |
-
1996
- 1996-05-01 CN CNB961946199A patent/CN1144763C/en not_active Expired - Fee Related
- 1996-05-01 DE DE69601267T patent/DE69601267T2/en not_active Expired - Lifetime
- 1996-05-01 KR KR1019970708802A patent/KR100355917B1/en not_active IP Right Cessation
- 1996-05-01 TR TR97/01523T patent/TR199701523T1/en unknown
- 1996-05-01 JP JP50020497A patent/JP4264132B2/en not_active Expired - Fee Related
- 1996-05-01 BR BR9609409A patent/BR9609409A/en not_active IP Right Cessation
- 1996-06-05 TW TW085106723A patent/TW432022B/en not_active IP Right Cessation
- 1996-06-06 AR ARP960103005A patent/AR002367A1/en unknown
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103517882A (en) * | 2011-05-05 | 2014-01-15 | 康宁股份有限公司 | Methods and apparatus for reforming a glass sheet |
| CN103517882B (en) * | 2011-05-05 | 2016-06-01 | 康宁股份有限公司 | The method being shaped again for sheet glass and equipment |
| CN109041574A (en) * | 2017-04-10 | 2018-12-18 | 法国圣戈班玻璃厂 | For making the curved gravity bending moulds with curved bearing surface of glass disc |
| CN109041574B (en) * | 2017-04-10 | 2021-12-28 | 法国圣戈班玻璃厂 | Gravity bending mould with curved bearing surface for bending glass discs |
| US11299416B2 (en) | 2017-04-10 | 2022-04-12 | Saint-Gobain Glass France | Gravity bending mould for bending glass panes with curved support surface |
| CN109896730A (en) * | 2017-12-07 | 2019-06-18 | 蓝思科技（长沙）有限公司 | A kind of glass bending forming method and device |
| CN110621626A (en) * | 2018-04-16 | 2019-12-27 | 法国圣戈班玻璃厂 | Support for gravity bending of glass |
| CN110650926A (en) * | 2018-04-27 | 2020-01-03 | 法国圣戈班玻璃厂 | Symmetrical bending |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4264132B2 (en) | 2009-05-13 |
| TW432022B (en) | 2001-05-01 |
| KR100355917B1 (en) | 2003-01-29 |
| JP2001508386A (en) | 2001-06-26 |
| AR002367A1 (en) | 1998-03-11 |
| KR19990022322A (en) | 1999-03-25 |
| DE69601267T2 (en) | 1999-07-08 |
| BR9609409A (en) | 1999-05-11 |
| TR199701523T1 (en) | 1998-02-21 |
| DE69601267D1 (en) | 1999-02-11 |
| MX9709500A (en) | 1998-03-31 |
| CN1144763C (en) | 2004-04-07 |
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