CN105050971A - 层叠玻璃结构以及制造方法 - Google Patents

层叠玻璃结构以及制造方法 Download PDF

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CN105050971A
CN105050971A CN201480006230.7A CN201480006230A CN105050971A CN 105050971 A CN105050971 A CN 105050971A CN 201480006230 A CN201480006230 A CN 201480006230A CN 105050971 A CN105050971 A CN 105050971A
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R·伯格曼
T·L·A·达努克斯
C·M·达坎吉罗
D·A·德纳卡
S·格雷
P·P·简恩
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Corning Inc
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    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
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    • 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
    • B32B17/10128—Treatment of at least one glass sheet
    • B32B17/10155—Edge treatment or chamfering
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    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
    • C03B29/02—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a discontinuous way
    • C03B29/025—Glass sheets
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Abstract

揭示了层叠玻璃结构，其具有一层或多层内玻璃层(其至少一层处于张力)以及处于压缩的两层外玻璃层，其中，所述外层的一层或两层在层叠玻璃结构的一个或多个边缘处至少部分卷绕所述一层或多层内层。还揭示了用于形成层叠玻璃结构的方法，包括：提供层叠玻璃结构，从结构的至少一个边缘去除至少一些玻璃，以在所述至少一个边缘中产生凹度，并向所述至少一个边缘施加热。

Description

层叠玻璃结构以及制造方法
相关申请的交叉参考
本申请根据35U.S.C.§119，要求2013年1月26日提交的美国临时申请系列第61/757,144号以及2013年5月31日提交的美国临时申请系列第61/829,660号的优先权，本文以该申请为基础并将其全文通过引用结合于此。
背景
本发明一般地涉及层叠玻璃制品或片及其制造方法，更具体地涉及层叠的玻璃制品或片，所述层叠的玻璃制品或片具有精整边缘，所述精整边缘具有增加的强度和抗破裂性，以及所述制品和片的制造方法。
发明内容
根据本发明的一个方面，提供了层叠玻璃结构，该结构包含一层或多层内玻璃层(所述内玻璃层的至少一层处于张力)以及两层处于压缩的外玻璃层(其层叠到所述一层或多层内层的相对侧上以形成层叠玻璃结构)，所述层叠玻璃结构具有相互相对的主表面并被一个或多个边缘限定，其中，所述外层的一层或两层在层叠玻璃结构的一个或多个边缘处至少部分卷绕所述一层或多层内层。
本发明的另一个方法包括用于形成层叠玻璃结构的方法，所述方法包括：1)提供层叠玻璃结构，所述层叠玻璃结构包括一层或多层内玻璃层(所述内层的至少一层处于张力)以及处于压缩的两层外玻璃层(其层叠到所述一层或多层内层的相对侧上)，所述结构具有两个相对主表面以及一个或多个边缘表面，在所述一个或多个边缘表面处，暴露出所述一层或多层内玻璃层和所述两层外玻璃层；2)从所述一个或多个边缘表面的至少一个去除至少一些玻璃，从而产生在所述一个或多个边缘表面的至少一个中产生凹度；以及3)向所述一个或多个边缘表面的至少一个施加热，从而使得所述外层的一层或两层在所述一个或多个边缘表面的至少一个处至少部分卷绕所述一层或多层内层。
结合下文的描述和附图，本发明的其他方面、优点和特征会是显而易见的。
附图说明
图1A-1C是截面示意图，显示根据本发明用于形成层叠结构的方法的一些方面，以及所得到的层叠结构的一些实施方式。
图2A-2C是截面示意图，显示图1A-1C所示的方法的变化形式或替代方法的一些步骤。
图3A和3B是计算机生成的未精整边缘的截面应力地图(图3A)和精整(圆)边缘的截面应力地图(图3B)。
图4A和4B是热处理之前(4A)和热处理之后(4B)的一个层叠结构的边缘的截面数码照片。
图5A和5B是热处理之前(5A)和热处理之后(5B)的另一层叠结构的边缘的截面数码照片。
具体实施方式
强化的层叠体具有价值的原因在于，玻璃的表面处于压缩，合乎希望的方式是玻璃的外层具有相对于内层低的热膨胀系数(CTE)。通过层叠结构的芯中的张力完成该外层中的压缩。通常，当对该层叠片进行切割时(例如，通过划线和破裂)，该中心张力发生暴露，对于所得到的玻璃制品或片，产生弱斑和潜在的破裂点。因此，希望边缘具有增加的强度和抗破坏性的层叠玻璃结构，并且需要形成此类层叠玻璃结构的方法。
根据本发明，通过如下方式提供这些优点和方法：层叠玻璃结构，其包含一层或多层内玻璃层(至少一层所述层处于张力)以及两层处于压缩的外玻璃层(其层叠到所述一层或多层内层的相对侧上以形成层叠玻璃结构)，所述层叠玻璃结构具有相互相对主表面并被一个或多个边缘限定。所述外层的一层或两层在层叠玻璃结构的一个或多个边缘处至少部分卷绕所述一层或多层内层。因此，保护了至少一部分的边缘免受容易的破坏以及免受具有处于张力的暴露表面区域。
希望地，外层卷绕所述一层或多层内层的距离至少是各个外层的厚度的1.5倍，更优选至少是2倍。对于一些应用，甚至希望外层卷绕所述一层或多层内层，该卷绕足以使得在层叠玻璃结构的一个或多个边缘处完全包围住所述一层或多层内层。此类结构以及它们的制造过程如图1A-1C所示。
图1A-1C是截面示意图，显示根据本发明用于形成层叠结构的方法的一些方面，以及所得到的层叠结构的一些实施方式。
在图1A中，提供层叠片10，其包括一层或多层内玻璃层12(灰色)以及两层外玻璃层14、16(黑色)，所述内层的至少一层处于张力，所述两层外玻璃层处于压缩，并层叠到所述一层或多层内层12的相对侧上。所述结构具有两个相对主表面23、30以及一个或多个边缘表面40(图1A顶部的边缘表面)，在所述边缘表面40处，暴露出来所述一层或多层内玻璃层12以及所述两层外玻璃层14、16。
接着，如图1B所示，以及如来自图1A的箭头所指示，从图1A的层叠片10的一个或多个边缘表面40的至少一个去除至少一些玻璃，从而在边缘表面40中产生凹度50。凹度50是方向垂直于层叠片10的相对主表面20、30的凹度(图1A和1B中从左到右)。凹度50可具有各种形式，其例子如图1B所示，宽凹口50a(仅留下完整的外层14、16)、窄凹口50b以及V-结构凹口50c。希望可通过进行激光处理(例如，激光烧蚀)、蚀刻、研磨或其任意组合去除玻璃以形成凹度50。也可采用其他技术。
接着，如图1C所示，以及如来自图1B的箭头所指示，向预先形成了凹度50的边缘表面40施加热，从而引起一个或两个外层14、16至少部分卷绕所述一层或多层内层12，如图1C底部的精整的层叠片110b那样，或者完全包围住所述一层或多层内层12，如图1C的顶部的精整的层叠片140a那样。可以通过激光和/或火焰加热进行加热。可以潜在地作为组合或者甚至单独应用其他加热方法，包括例如辐射加热和等离子体加热之类的方法。玻璃在加热下的固有运动以及CTE/表面张力作用足以引起外层14、16向内弯曲并且部分或完全地覆盖内层12，如图1C所示。无需以图1C所示的确切朝向(边缘上方)进行加热，但是这是一种可供选择的方案并且可能在某些情况下是优选的。
图2A-2C是截面示意图，显示图1A-1C所示的方法的变化形式或替代方法的一些步骤。在该替代方法中，图1B中的步骤中的凹度50的起始形状可以更深，或者任意其他方式改性，例如图2A的更深的凹度50d和50e。从这种更深或任意其他方式改性的凹度50开始，然后当对边缘表面40进行加热时，可产生中心处的空穴60的部分密封，如图2B所示。然后该空穴60可有利地用于安置保护和缓冲安装界面，例如如图2C所示的那样，包括保护密封以及安装或固定材料70结合框架80。该空穴60不是必需的，但是在边缘表面40中用于包装、安装或其他目的从而可能希望凹槽的情况下可能是有益的选择方案。
图3A是计算机生成的未精整边缘的截面应力地图(图3A)和精整(圆)边缘的截面应力地图(图3B)，精整边缘处的一层或多层内层12仅被外层14、16部分包围住。从图3B可以看出，角得到了外(压缩)层的有效保护，高应力玻璃(显示为绿色阴影[少量甚至更高的应力为红色])的体积下降(相对于图3A)。
实验
根据本发明的一个方法实施方式，采用金刚石锯的边缘，使用研磨产生凹度。为向边缘施加热，首先采用加热的卡盘和红外辐射加热器，将边缘预加热至500-600℃。接着，以垂直于束的恒定进料速率，使边缘移动通过固定CO2激光束，编程的机械臂对通过束的边缘进行操纵。所使用的激光产生20-130瓦特的功率，斑尺寸的大小约为玻璃层叠体的宽度乘以进料方向的10mm长。进料速率为5-20mm/s。(可以基于玻璃、边缘形状以及所需或所希望的变形程度，对激光功率、激光斑尺寸和进料速率进行优化。)在激光边缘精整之后，希望以受控的速率进行冷却，否则玻璃可能破裂。在该情况下，使用650℃持续1小时退火，以降低应力。图4A和4B以及5A和5B显示热处理之前的边缘以及热处理之后得到的边缘，加热之前的层叠结构显示为“A”照片，加热之后的层叠结构显示为“B”照片。如图4B和5B可以看出，采用本发明的方法可以完全包围住玻璃层叠结构的内层，而不引起层叠结构的厚度增加。所得到的边缘具有抛光(热抛光)表面，没有留下机械加工工具标记或破损。

Claims (15)

1.一种层叠玻璃结构，其包括：
一层或多层内玻璃层，至少一层所述层处于张力，以及
两层处于压缩的外玻璃层，其层叠到所述一层或多层内层的相对侧上以形成层叠玻璃结构，所述层叠玻璃结构具有相互相对的主表面并被一个或多个边缘限定，
所述外层中的一层或两层在所述层叠玻璃结构的一个或多个边缘处至少部分卷绕所述一层或多层内层。
2.如权利要求1所述的结构，其特征在于，所述外层中的一层或两层卷绕所述一层或多层内层，卷绕的距离至少是各个外层的厚度的1.5倍。
3.如权利要求1所述的结构，其特征在于，所述外层中的一层或两层卷绕所述一层或多层内层，卷绕的距离至少是各个外层的厚度的2倍。
4.如权利要求1-3中任一项所述的结构，其特征在于，所述外层中的一层或两层卷绕所述一层或多层内层，该卷绕足以使得在所述层叠玻璃结构的一个或多个边缘处包围住所述一层或多层内层。
5.如权利要求1-4中任一项所述的结构，其特征在于，所述结构在垂直于所述相对主表面的方向具有这样的厚度，即在靠近边缘处的位置的厚度不大于靠近所述主表面的中心处的位置的厚度。
6.如权利要求1-5中任一项所述的结构，其特征在于，所述结构在所述外层中的一层或两层卷绕所述一层或多层内层的位置处的外表面没有机械加工工具接触损坏。
7.如权利要求1-6中任一项所述的结构，其特征在于，所述结构在所述外层中的一层或两层卷绕所述一层或多层内层的位置处的外表面是热抛光表面。
8.一种用于形成层叠玻璃结构的方法，所述方法包括：
提供层叠玻璃结构，其包含一层或多层内玻璃层以及两层外玻璃层，所述内层的至少一层处于张力，所述两层外玻璃层处于压缩并且层叠到所述一层或多层内层的相对侧上，所述结构具有两个相对主表面以及一个或多个边缘表面，在所述边缘表面处，暴露出所述一层或多层内玻璃层和所述两层外玻璃层；
从所述一个或多个边缘表面的至少一个去除至少部分玻璃，从而在所述一个或多个边缘表面的至少一个中产生凹度，其方向垂直于所述相对主表面；以及
向所述一个或多个边缘表面的至少一个施加热，从而使得所述外层中的一层或两层在所述一个或多个边缘表面的至少一个处至少部分卷绕所述一层或多层内层。
9.如权利要求8所述的方法，其特征在于，所述去除步骤包括研磨。
10.如权利要求8或9所述的方法，其特征在于，所述去除步骤包括蚀刻。
11.如权利要求8-10中任一项所述的方法，其特征在于，所述去除步骤包括激光烧蚀。
12.如权利要求8-11中任一项所述的方法，其特征在于，所述施加热的步骤包括从火焰施加热。
13.如权利要求8-12中任一项所述的方法，其特征在于，所述施加热的步骤包括施加激光能。
14.如权利要求8-13中任一项所述的方法，其特征在于，所述施加热的步骤包括辐射加热。
15.如权利要求8-14中任一项所述的方法，其特征在于，所述施加热的步骤包括等离子体加热。
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