JPH08231236A - Production of tempered glass - Google Patents
Production of tempered glassInfo
- Publication number
- JPH08231236A JPH08231236A JP3693095A JP3693095A JPH08231236A JP H08231236 A JPH08231236 A JP H08231236A JP 3693095 A JP3693095 A JP 3693095A JP 3693095 A JP3693095 A JP 3693095A JP H08231236 A JPH08231236 A JP H08231236A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- temp
- tempering
- cooling
- glass plate
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、物理強化とよばれる方
法による強化ガラスの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing tempered glass by a method called physical tempering.
【０００２】[0002]
【従来の技術】従来、ガラスが所望の強化度に達するま
で一定の冷却能で強化を行うことが知られている。ま
た、物理強化による強化ガラスの製造方法としては、成
形後に型内で風冷強化を行う工法（例えば、特公昭６２
−４０９２８号公報や特公昭６３−４９２号公報など）
や、成形後に別に設ける風冷強化部へ搬送し風冷強化を
行う工法（例えば、特公昭５９−１９８９０号公報や特
開昭６２−２７０４２９号公報など）などのバッチ式の
工法が知られている。2. Description of the Related Art Conventionally, it is known that glass is tempered with a constant cooling capacity until it reaches a desired tempering degree. Further, as a method for producing a tempered glass by physical tempering, a method of performing air-cooling tempering in a mold after molding (for example, Japanese Patent Publication No. Sho 62).
-40928 and Japanese Patent Publication No. 63-492)
Alternatively, a batch-type construction method such as a construction method in which it is conveyed to a separately provided air-cooling-strengthened portion after molding and air-strengthened (for example, Japanese Patent Publication No. 59-19890 and Japanese Patent Laid-Open No. 62-270429) is known. There is.
【０００３】[0003]
【発明が解決しようとする課題】従来の技術で述べた工
法では、一定の高い冷却能で強化しているので、表面層
が粘性流動を起こさなくなった温度域でのガラス表面層
と中心部（内部）の温度差が大きくなり、それによる大
きな熱応力が発生して冷却割れが発生し易いという問題
点を有していた。In the method described in the prior art, since the glass is strengthened with a certain high cooling capacity, the glass surface layer and the central portion (in the temperature range where the surface layer does not cause viscous flow) There is a problem that the temperature difference of (inside) becomes large, and a large thermal stress is generated due to the temperature difference, which easily causes cooling cracks.
【０００４】また、これらの工法では、一定の場所（風
冷強化部）にガラスを滞在させて強化を行うため、所望
の強化度が達成されるまで次のガラスを強化することが
出来ないので、一枚当りの成形完了時間（強化を含む）
が強化にかかる時間により決定され、それ以上の成形サ
イクル短縮が図れないという問題点を有していた。更
に、成形サイクルを短縮するために、一定の高い冷却能
で強化しているので、冷却割れが発生し易いという問題
点を有していた。Further, in these construction methods, the glass is allowed to stay in a certain place (air-cooled tempered portion) for strengthening, and therefore the next glass cannot be tempered until the desired degree of tempering is achieved. , Completion time per sheet (including strengthening)
Was determined by the time required for strengthening, and there was a problem that the molding cycle could not be shortened any further. Further, in order to shorten the molding cycle, since it is strengthened with a certain high cooling capacity, there is a problem that cooling cracks are likely to occur.
【０００５】本発明は、従来の技術が有するこのような
問題点に鑑みてなされたものであり、その目的とすると
ころは、強化中の冷却割れを減少することが出来、また
成形サイクルを短縮することが出来る強化ガラスの製造
方法を提供しようとするものである。The present invention has been made in view of the above problems of the prior art. The object of the present invention is to reduce cooling cracks during strengthening and shorten the molding cycle. The present invention is intended to provide a method of manufacturing a tempered glass that can be manufactured.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決すべく請
求項１の強化ガラスの製造方法は、軟化点近くまで加熱
されたガラスを物理強化して強化ガラスを製造する方法
において、強化中の冷却能を変化させるものである。In order to solve the above-mentioned problems, the method for producing tempered glass according to claim 1 is a method for producing tempered glass by physically strengthening glass heated to near the softening point. It changes the cooling capacity.
【０００７】また、請求項２の強化ガラスの製造方法
は、軟化点近くまで加熱されたガラスを物理強化して強
化ガラスを製造する方法において、所望の強化度が達成
される前に強化を止めてガラス温度が徐冷点を下回る前
に前記ガラスを次工程へ搬出する第１強化工程と、この
第１強化工程に引続き前記ガラスに対し再度強化を行っ
て所望の強化度を得る第２強化工程とから成るものであ
る。The method for producing tempered glass according to claim 2 is a method for producing tempered glass by physically strengthening glass heated to near the softening point, where the tempering is stopped before the desired degree of tempering is achieved. The first tempering step of carrying out the glass to the next step before the glass temperature falls below the slow cooling point, and the second tempering to obtain the desired degree of tempering by further strengthening the glass following the first tempering step. And the process.
【０００８】[0008]
【作用】請求項１の強化ガラスの製造方法によれば、強
化中に表面層が粘性流動を起こさなくなった温度域に達
した時に、冷却能を減少させることにより、表面層と中
心部に発生する熱応力を減少させ、割れを減少させる。According to the method for producing a tempered glass of claim 1, when the surface layer reaches a temperature range where viscous flow does not occur during tempering, the cooling ability is reduced to generate in the surface layer and the central portion. It reduces thermal stress and reduces cracking.
【０００９】また、請求項２の強化ガラスの製造方法に
よれば、所望の強化度が達成される前に強化を止めて第
１強化工程から再度強化を行って所望の強化度を得る第
２強化工程にガラスが搬出されるので、第１強化工程に
ガラスが滞在する時間が短縮される。According to the method for producing a tempered glass of claim 2, the tempering is stopped before the desired tempering degree is achieved, and the tempering is performed again from the first tempering step to obtain the desired tempering degree. Since the glass is carried out in the strengthening step, the time during which the glass stays in the first strengthening step is shortened.
【００１０】[0010]
【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。ここで、図１は請求項１の強化ガラスの製造
方法におけるガラス板の冷却状態と応力の発生状態を示
すグラフ、図２は請求項２の強化ガラスの製造方法の一
実施例に係る工程説明図、図３は同じくガラス板の冷却
状態と応力の発生状態を示すグラフである。Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a graph showing a cooling state and a stress generation state of a glass plate in the method for manufacturing a tempered glass according to claim 1, and FIG. 2 is a process explanation according to an embodiment of the method for manufacturing a tempered glass according to claim 2. FIG. 3 and FIG. 3 are graphs showing the cooling state of the glass plate and the stress generation state.
【００１１】ガラス板の物理強化は、軟化点近くまで加
熱されたガラス板を急冷することにより、表面に圧縮応
力層を形成することで可能になる。理想的な強化におけ
るガラス板の冷却状態と応力の発生状態を、図４に示
す。先ず、図４（ａ）に示すように、軟化点付近の温度
ＴOまで加熱されたガラス板を風冷すると、ガラス表面
の方が内部より温度降下が速く、表面に引張応力が発生
し、中心部に圧縮応力が発生する。Physical strengthening of the glass plate can be achieved by rapidly cooling the glass plate heated to near the softening point to form a compressive stress layer on the surface. FIG. 4 shows the cooling state and stress generation state of the glass plate in ideal tempering. First, as shown in FIG. 4A, when a glass plate heated to a temperature T O near the softening point is air-cooled, the temperature of the glass surface is lower than that of the inside, and tensile stress is generated on the surface. Compressive stress is generated in the center.
【００１２】しかし、軟化点付近の温度ＴOのガラス板
では、この応力は、図４（ｃ）に示すように、短時間で
緩和され、図４（ｂ）に示すように、表面温度ＴS1と中
心部温度ＴM1の温度差△Ｔ1（＝ＴM1−ＴS1） が存在す
るにも拘らず応力が発生していない状態になる。[0012] However, the glass plate temperature T O of the vicinity of the softening point, the stress, as shown in FIG. 4 (c), is relaxed in a short time, as shown in FIG. 4 (b), the surface temperature T Although there is a temperature difference ΔT 1 (= T M1 −T S1 ) between S1 and the center temperature T M1 , no stress is generated.
【００１３】さらに冷却が進むと、ガラス板は応力が発
生しない状態で徐冷点まで温度降下し、最後に室温にな
って温度差△Ｔ1＝０になった時、高温時△Ｔ1maxに起
因する熱応力を緩和した分だけ符号が変わってガラス板
の表面に圧縮応力、図４（ｃ）に示すように、中心部に
引張応力が発生する。As the cooling further progresses, the temperature of the glass plate drops to the annealing point in the state where no stress is generated, and finally when the temperature reaches room temperature and the temperature difference ΔT 1 = 0, the temperature becomes ΔT 1max at high temperature. The sign changes due to the relaxation of the resulting thermal stress, and compressive stress is generated on the surface of the glass plate, and tensile stress is generated at the central portion as shown in FIG. 4 (c).
【００１４】請求項１の強化ガラスの製造方法における
ガラス板の冷却状態と応力の発生状態を、図１に示す。FIG. 1 shows the cooling state and stress generation state of the glass plate in the tempered glass manufacturing method of the first aspect.
【００１５】従来の一定の高い冷却能で冷却した場合に
は、図１（ａ）〜（ｃ）に示すように、ガラス表面の過
冷却により表面温度ＴS1と中心部温度ＴM1で高い温度差
△Ｔ1max（＝ＴM1−ＴS1）が生じ、ガラス表面に引張応
力、ガラス中心部に圧縮応力が発生しガラス板に割れが
発生しやすくなる。When the conventional cooling is performed with a constant high cooling capacity, as shown in FIGS. 1A to 1C, the surface temperature T S1 and the center temperature T M1 are high due to the supercooling of the glass surface. A difference ΔT 1max (= T M1 −T S1 ) is generated, a tensile stress is generated on the glass surface, and a compressive stress is generated on the center of the glass, so that the glass plate is easily cracked.
【００１６】一方、請求項１の強化ガラスの製造方法で
は、図１（ａ）に示すように、軟化点付近の温度ＴOま
で加熱されたガラス板を、従来と同様に高い冷却能で強
化を行う。そして、表面層が粘性流動を起こさなくなっ
た温度域に達した時に、冷却能を小さくすることによっ
て、図１（ｂ）に示すように、表面温度ＴS2と中心部温
度ＴM2の温度差△Ｔ2が、適正な温度差△Ｔ2max（＝Ｔ
M2−ＴS2）になるよう冷却能を調節する。[0016] On the other hand, in the manufacturing method of the glass of claim 1 reinforced, as shown in FIG. 1 (a), a glass sheet heated to a temperature T O of the vicinity of the softening point, the conventional as well as high cooling capacity I do. Then, when the surface layer reaches the temperature range where the viscous flow does not occur, the cooling capacity is reduced so that the temperature difference Δ between the surface temperature T S2 and the central portion temperature T M2 as shown in FIG. T 2 is a proper temperature difference ΔT 2max (= T
Adjust the cooling capacity to be M2- T S2 ).
【００１７】このように従来の工法において冷却能を減
少させることにより、表面層と中心部に発生する熱応力
を減少させ、割れを減少させている。As described above, by reducing the cooling capacity in the conventional method, the thermal stress generated in the surface layer and the central portion is reduced, and the cracks are reduced.
【００１８】請求項２の強化ガラスの製造方法を実施す
る強化ガラスの製造工程は、例えば図２に示すように、
第１強化工程と第２強化工程による２段階冷却によって
構成されている。The tempered glass manufacturing process for carrying out the tempered glass manufacturing method of claim 2 is, for example, as shown in FIG.
It is configured by two-stage cooling by the first strengthening process and the second strengthening process.
【００１９】第１強化工程は、風冷用ジェットが吐出可
能な上型１と下型２、ガラス周辺部の成形および風冷中
のガラス５を支持するためのリングモールド１０から成
る成形部３を備え、第２強化工程は、一群のノズル４か
らガラス板５の両面に垂直に空気ジェットを吹き付ける
風冷ノズルボックス６から成っている。なお、７はガラ
ス板５を加熱する加熱炉、８はガラス板５を矢印方向に
搬送する搬送ローラ、９は第１強化工程と第２強化工程
が互いに影響しないよう隔てるシャッタである。風冷ノ
ズルボックス６は、ノズル４とガラス５の最適な距離が
保たれるように可動式である。In the first strengthening step, a molding part 3 comprising an upper mold 1 and a lower mold 2 capable of ejecting a jet for air cooling, a molding of the peripheral portion of the glass and a ring mold 10 for supporting the glass 5 in the air cooling. And the second strengthening step consists of an air-cooled nozzle box 6 that blows an air jet perpendicularly to both sides of the glass plate 5 from a group of nozzles 4. In addition, 7 is a heating furnace for heating the glass plate 5, 8 is a conveying roller for conveying the glass plate 5 in the direction of the arrow, and 9 is a shutter for separating the first strengthening step and the second strengthening step so as not to affect each other. The air-cooled nozzle box 6 is movable so that the optimum distance between the nozzle 4 and the glass 5 is maintained.
【００２０】第１強化工程では、加熱炉７で軟化点近く
まで加熱されたガラス板５を成形部３でプレス成形した
後に、そのまま下型２にガラス板５を載置して冷却し、
上型１と下型２が開き、リングモールド１０上でガラス
５を上型１と下型２から吐出する空気ジェットで冷却
し、所望の強化度が達成される前に強化を止め、ガラス
温度が徐冷点を下回る前にガラス板５を次工程である第
２強化工程に搬送する。In the first strengthening step, the glass plate 5 heated to near the softening point in the heating furnace 7 is press-molded in the molding unit 3, and then the glass plate 5 is placed on the lower mold 2 and cooled,
The upper mold 1 and the lower mold 2 are opened, and the glass 5 is cooled on the ring mold 10 by an air jet discharged from the upper mold 1 and the lower mold 2, and the tempering is stopped before the desired strengthening degree is achieved, and the glass temperature is lowered. Before the temperature falls below the annealing point, the glass plate 5 is conveyed to the next step, the second strengthening step.
【００２１】次いで、第２強化工程では、ノズル４から
ガラス板５の両面に垂直に空気ジェットを吹き付け、第
１強化工程に引続きガラス板５に対し再度強化を行って
所望の強化度を得るようにしている。Next, in the second strengthening step, an air jet is vertically sprayed from both sides of the glass plate 5 from the nozzle 4, and after the first strengthening step, the glass plate 5 is strengthened again to obtain a desired strengthening degree. I have to.
【００２２】強化工程を２分割したことにより、所望の
強化度を得るために同一場所（この例では成形部３）に
ガラス板５を滞在させる時間が短くなり、強化ガラス製
造ラインのタクト短縮に貢献出来る。By dividing the tempering process into two, the time for allowing the glass sheet 5 to stay in the same place (the molding portion 3 in this example) in order to obtain the desired degree of strengthening is shortened, which shortens the tact time of the tempered glass production line. I can contribute.
【００２３】また、強化工程を２分割することにより、
強化の進行に合せて冷却能を変化させることが容易にな
る。これによって、冷却時のガラス表面層と中心部の温
度差が急激に増大することを調整し、表面層と中心部に
発生する熱応力が不必要に大きくなることを防ぎ割れを
減少させる。Further, by dividing the strengthening process into two,
It becomes easy to change the cooling capacity as the strengthening progresses. Thereby, the temperature difference between the glass surface layer and the central portion during cooling is adjusted to abruptly increase, the thermal stress generated in the surface layer and the central portion is prevented from becoming unnecessarily large, and cracks are reduced.
【００２４】請求項２の強化ガラスの製造方法における
ガラス板５の冷却状態と応力の発生状態を図４に示した
従来の工法で冷却した場合と比較して、図３に示す。FIG. 3 shows the state of cooling the glass plate 5 and the state of generation of stress in the method for producing a tempered glass of claim 2 in comparison with the case of cooling by the conventional method shown in FIG.
【００２５】請求項２の強化ガラスの製造方法では、第
１強化工程でガラス板５の冷却を行うものの、ガラス温
度が徐冷点に達する前にガラス板５の冷却を中断し（区
間Ａ）、更にガラス板５を成形部３から風冷ノズル６ま
で搬送する（区間Ｂ）。次いで、第２強化工程でガラス
温度が徐冷点まで下降する前に再度冷却を行い（区間
Ｃ）、所望の強化度を達成する（区間Ｄ）。In the tempered glass manufacturing method of claim 2, the glass plate 5 is cooled in the first tempering step, but the cooling of the glass plate 5 is interrupted before the glass temperature reaches the annealing point (section A). Further, the glass plate 5 is conveyed from the molding unit 3 to the air cooling nozzle 6 (section B). Next, in the second tempering step, cooling is performed again before the glass temperature falls to the annealing point (section C), and the desired degree of strengthening is achieved (section D).
【００２６】従来の一定の高い冷却能で冷却した場合、
図３（ａ）〜（ｃ）に示すように、区間Ａ〜区間Ｃでは
ガラス表面の過冷却により表面温度ＴS1と中心部温度Ｔ
M1で高い温度差△Ｔ1max（＝ＴM1−ＴS1）が生じ、ガラ
ス表面に引張応力、ガラス中心部に圧縮応力が発生しガ
ラス板に割れが発生しやすくなる。When cooled with a constant high cooling capacity of the prior art,
As shown in FIGS. 3A to 3C, in the sections A to C, the surface temperature T S1 and the center temperature T S1 are caused by the supercooling of the glass surface.
A high temperature difference ΔT 1max (= T M1 −T S1 ) is generated in M1 , tensile stress is generated on the glass surface, and compressive stress is generated on the center of the glass, which easily causes cracks in the glass plate.
【００２７】一方、請求項２の強化ガラスの製造方法に
よる２段階冷却では、図３（ａ）に示すように、第１強
化工程の区間Ａにおいて、従来と同じ高い冷却能で第１
段階の冷却を行う。この時、ガラス板５の温度が徐冷点
を下回らないようにする。更に、区間Ｂにおけるガラス
板５の搬送中において、ガラス板５の内部の熱量の移動
により、ガラス板５の中心部温度ＴM2が下降し、ガラス
板５の表面温度ＴS2が上昇する。On the other hand, in the two-step cooling by the method for manufacturing a tempered glass according to claim 2, as shown in FIG. 3 (a), in the section A of the first tempering step, with the same high cooling capacity as the conventional one,
Stage cooling. At this time, the temperature of the glass plate 5 is prevented from falling below the annealing point. Further, during the transportation of the glass plate 5 in the section B, the central portion temperature T M2 of the glass plate 5 decreases and the surface temperature T S2 of the glass plate 5 increases due to the movement of the amount of heat inside the glass plate 5.
【００２８】次いで、第２強化工程の区間Ｃにおいて、
冷却能を小さくして再度冷却を行うことによって、図３
（ｂ）に示すように、表面温度ＴS2と中心部温度ＴM2の
温度差△Ｔ2が、適正な温度差△Ｔ2max（＝ＴM2−
ＴS2）になるよう冷却能を調節する。Next, in the section C of the second strengthening step,
By reducing the cooling capacity and cooling again,
As shown in (b), the temperature difference ΔT 2 between the surface temperature T S2 and the central portion temperature T M2 is an appropriate temperature difference ΔT 2max (= T M2 −
Adjust the cooling capacity to be T S2 ).
【００２９】ここまでの区間Ａ〜区間Ｃでは、ガラス温
度ＴM2，ＴS2は徐冷点を下回っていないので、ガラス板
５に応力は発生していない。区間Ｄ以降で、図３（ｃ）
に示すように、ガラス温度が徐冷点を下回るので熱応力
が発生する。すると、ガラス板５に所望の強化度が得ら
れる。In the sections A to C so far, the glass temperatures T M2 and T S2 do not fall below the annealing point, so that no stress is generated in the glass plate 5. After section D, FIG. 3 (c)
As shown in, the glass temperature is below the annealing point, so that thermal stress occurs. Then, the glass plate 5 has a desired degree of strengthening.
【００３０】[0030]
【発明の効果】以上説明したように本発明によれば、以
下に記載する効果を奏する。請求項１の強化ガラスの製
造方法においては、強化中の冷却能を変化させることに
より、表面層が粘性流動を起こさなくなった温度域で必
要以上に大きな熱応力が発生するのが抑えられ、冷却時
の割れの発生を防止出来る。As described above, according to the present invention, the following effects can be obtained. In the method for producing a tempered glass according to claim 1, by changing the cooling capacity during tempering, it is possible to suppress generation of unnecessarily large thermal stress in a temperature range where the surface layer does not cause viscous flow, and cooling is performed. It can prevent the occurrence of cracks.
【００３１】請求項２の強化ガラスの製造方法において
は、所望の強化度が達成される前に強化を止めて第１強
化工程からガラスを搬出するので、次のガラスの強化を
従来より短い時間間隔で出来、サイクルの短縮が図れ
る。In the tempered glass manufacturing method of the second aspect, the tempering is stopped before the desired degree of tempering is achieved and the glass is carried out from the first tempering step. It can be done at intervals and the cycle can be shortened.
【図面の簡単な説明】[Brief description of drawings]
【図１】請求項１の強化ガラスの製造方法におけるガラ
ス板の冷却状態と応力の発生状態を示すグラフFIG. 1 is a graph showing a cooling state of a glass plate and a stress generation state in the method for producing a tempered glass according to claim 1.
【図２】請求項２の強化ガラスの製造方法の一実施例に
係る工程説明図FIG. 2 is a process explanatory diagram according to an embodiment of the method for manufacturing a tempered glass according to claim 2;
【図３】請求項２の強化ガラスの製造方法におけるガラ
ス板の冷却状態と応力の発生状態を示すグラフFIG. 3 is a graph showing a cooling state of a glass plate and a stress generation state in the method for manufacturing a tempered glass according to claim 2;
【図４】理想的なガラス板の冷却状態と応力の発生状態
を示すグラフFIG. 4 is a graph showing an ideal glass plate cooling state and stress generation state.
１…上型、２…下型、３…成形部、５…ガラス板、６…
風冷ノズル、７…加熱炉、８…搬送ローラ、９…シャッ
タ、１０…リングモールド、ＴS1，ＴS2…ガラス板の表
面温度、ＴM1，ＴM2…ガラス板の中心部温度。1 ... Upper mold, 2 ... Lower mold, 3 ... Molding part, 5 ... Glass plate, 6 ...
Air-cooling nozzle, 7 ... Heating furnace, 8 ... Conveying roller, 9 ... Shutter, 10 ... Ring mold, T S1 , T S2 ... Glass plate surface temperature, T M1 , T M2 ... Glass plate center temperature.
Claims (2)
強化して強化ガラスを製造する方法において、強化中の
冷却能を変化させることを特徴とする強化ガラスの製造
方法。1. A method for producing a tempered glass by physically tempering a glass heated to near the softening point, wherein the cooling ability during tempering is changed.
強化して強化ガラスを製造する方法において、所望の強
化度が達成される前に強化を止めてガラス温度が徐冷点
を下回る前に前記ガラスを次工程へ搬出する第１強化工
程と、この第１強化工程に引続き前記ガラスに対し再度
強化を行って所望の強化度を得る第２強化工程とから成
ることを特徴とする強化ガラスの製造方法。2. A method for producing a tempered glass by physically tempering a glass heated to near the softening point, wherein the tempering is stopped before the desired degree of tempering is achieved and the glass temperature falls below the annealing point. A tempered glass comprising a first tempering step of carrying out the glass to the next step and a second tempering step of obtaining the desired degree of tempering by subsequently strengthening the glass again after the first tempering step. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03693095A JP3688331B2 (en) | 1995-02-24 | 1995-02-24 | Method for producing tempered glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03693095A JP3688331B2 (en) | 1995-02-24 | 1995-02-24 | Method for producing tempered glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08231236A true JPH08231236A (en) | 1996-09-10 |
| JP3688331B2 JP3688331B2 (en) | 2005-08-24 |
Family
ID=12483483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03693095A Expired - Fee Related JP3688331B2 (en) | 1995-02-24 | 1995-02-24 | Method for producing tempered glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3688331B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863146A (en) * | 2011-07-06 | 2013-01-09 | 常州亚玛顿股份有限公司 | Physical toughened glass, solar cell panel and manufacture methods of physical toughened glass and solar cell panel |
| US8363982B2 (en) | 2007-10-09 | 2013-01-29 | Nec Corporation | Method for rotating image, program for rotation, recording medium, and rotation device |
| CN103058507A (en) * | 2011-10-18 | 2013-04-24 | 浙江福隆鼎玻璃科技有限公司 | Manufacturing method of fireproof glass |
-
1995
- 1995-02-24 JP JP03693095A patent/JP3688331B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8363982B2 (en) | 2007-10-09 | 2013-01-29 | Nec Corporation | Method for rotating image, program for rotation, recording medium, and rotation device |
| CN102863146A (en) * | 2011-07-06 | 2013-01-09 | 常州亚玛顿股份有限公司 | Physical toughened glass, solar cell panel and manufacture methods of physical toughened glass and solar cell panel |
| CN103058507A (en) * | 2011-10-18 | 2013-04-24 | 浙江福隆鼎玻璃科技有限公司 | Manufacturing method of fireproof glass |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3688331B2 (en) | 2005-08-24 |
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