Method for manufacturing glass substrate for magnetic disk
    3.
    发明授权
    Method for manufacturing glass substrate for magnetic disk 有权
    制造磁盘用玻璃基板的方法

    公开(公告)号:US09153269B2

    公开(公告)日:2015-10-06

    申请号:US14001735

    申请日:2012-05-23

    IPC分类号: G11B5/84

    CPC分类号: G11B5/8404

    摘要: A method for manufacturing a glass substrate for magnetic disk, the internal strain of which is reduced without performing annealing treatment, is provided. The method includes a forming process of forming a plate-shaped glass blank by pressing a lump of molten glass using a pair of dies, wherein the method includes: a removing process of removing at least a part of a residual stress layer formed on the principal face of the glass blank press-formed in the forming process; and a process of forming a donut-shaped glass substrate by subjecting the glass blank after the removing process to machining.

    摘要翻译: 提供了一种制造磁盘用玻璃基板的方法,该玻璃基板的内部应变在不进行退火处理的情况下减小。 该方法包括通过使用一对模具按压熔融玻璃块形成板状玻璃坯料的方法,其中所述方法包括:去除在主体上形成的残余应力层的至少一部分的去除工艺 在成型过程中压制成型的玻璃坯料的表面; 以及通过在除去过程之后对玻璃坯进行加工来形成环形玻璃基板的工艺。

    METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK
    4.
    发明申请
    METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK 有权
    用于制造磁盘的玻璃基板的方法

    公开(公告)号:US20140060117A1

    公开(公告)日:2014-03-06

    申请号:US14001735

    申请日:2012-05-23

    IPC分类号: G11B5/84

    CPC分类号: G11B5/8404

    摘要: A method for manufacturing a glass substrate for magnetic disk, the internal strain of which is reduced without performing annealing treatment, is provided. The method includes a forming process of forming a plate-shaped glass blank by pressing a lump of molten glass using a pair of dies, wherein the method includes: a removing process of removing at least a part of a residual stress layer formed on the principal face of the glass blank press-formed in the forming process; and a process of forming a donut-shaped glass substrate by subjecting the glass blank after the removing process to machining.

    摘要翻译: 提供了一种制造磁盘用玻璃基板的方法,该玻璃基板的内部应变在不进行退火处理的情况下减小。 该方法包括通过使用一对模具按压熔融玻璃块形成板状玻璃坯料的方法,其中所述方法包括:去除在主体上形成的残余应力层的至少一部分的去除工艺 在成型过程中压制成型的玻璃坯料的表面; 以及通过在除去过程之后对玻璃坯进行加工来形成环形玻璃基板的工艺。

    Method for manufacturing glass blank for magnetic disk, method for manufacturing glass substrate for magnetic disk
    6.
    发明授权
    Method for manufacturing glass blank for magnetic disk, method for manufacturing glass substrate for magnetic disk 有权
    磁盘用玻璃坯料的制造方法,磁盘用玻璃基板的制造方法

    公开(公告)号:US09336810B2

    公开(公告)日:2016-05-10

    申请号:US13982877

    申请日:2012-04-27

    IPC分类号: C03B11/12 G11B5/84 C03B11/08

    摘要: A method for manufacturing a glass substrate for magnetic disk is provided in which a glass is kept from being fused to a mold during press forming and shape processing to achieve a good circularity is efficiently performed. The method includes: a forming process of forming a disk-shaped glass blank by direct-pressing a molten glass by a pair of dies; and a shape processing process of performing at least one of inner hole formation and outer shape formation for forming a disk-shaped glass substrate by forming a cutting line on the principal face of the glass blank, followed by growing the cutting line to perform cutting. In the forming process, press forming is performed while the temperature of the pair of dies, over a period of time until a molten glass is separated from the die after coming into contact with the die, is set at a temperature lower than a glass transition point (Tg) and a mold release material is not attached to the surfaces of the pair of dies.

    摘要翻译: 提供一种用于制造用于磁盘的玻璃基板的方法,其中在压制成形期间保持玻璃不熔化到模具,并且有效地执行形状处理以实现良好的圆形度。 该方法包括:通过一对模具直接压制熔融玻璃来形成盘状玻璃坯料的成形过程; 以及通过在玻璃坯料的主面上形成切割线,进行用于形成圆盘状的玻璃基板的内孔形成和外形形成中的至少一种的形状加工工序,然后使切割线成长进行切削。 在成形过程中,一边进行压制成形,一边在与模具接触的熔融玻璃与模具分离一段时间的一段时间内,将其设定为低于玻璃化转变温度 点(Tg)和脱模材料未附接到该对模具的表面。

    METHOD FOR MANUFACTURING GLASS BLANK FOR MAGNETIC DISK, METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK
    7.
    发明申请
    METHOD FOR MANUFACTURING GLASS BLANK FOR MAGNETIC DISK, METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK 有权
    用于制造用于磁盘的玻璃棉的方法,用于制造用于磁盘的玻璃基底的方法

    公开(公告)号:US20140033768A1

    公开(公告)日:2014-02-06

    申请号:US13982877

    申请日:2012-04-27

    IPC分类号: G11B5/84 C03B11/12

    摘要: A method for manufacturing a glass substrate for magnetic disk is provided in which a glass is kept from being fused to a mold during press forming and shape processing to achieve a good circularity is efficiently performed. The method includes: a forming process of forming a disk-shaped glass blank by direct-pressing a molten glass by a pair of dies; and a shape processing process of performing at least one of inner hole formation and outer shape formation for forming a disk-shaped glass substrate by forming a cutting line on the principal face of the glass blank, followed by growing the cutting line to perform cutting. In the forming process, press forming is performed while the temperature of the pair of dies, over a period of time until a molten glass is separated from the die after coming into contact with the die, is set at a temperature lower than a glass transition point (Tg) and a mold release material is not attached to the surfaces of the pair of dies.

    摘要翻译: 提供一种用于制造用于磁盘的玻璃基板的方法,其中在压制成形期间保持玻璃不熔化到模具,并且有效地执行形状处理以实现良好的圆形度。 该方法包括:通过一对模具直接压制熔融玻璃来形成盘状玻璃坯料的成形过程; 以及通过在玻璃坯料的主面上形成切割线,进行用于形成圆盘状的玻璃基板的内孔形成和外形形成中的至少一种的形状加工工序,然后使切割线成长进行切削。 在成形过程中,一边进行压制成形,一边在与模具接触的熔融玻璃与模具分离一段时间的一段时间内,将其设定为低于玻璃化转变温度 点(Tg)和脱模材料未附接到该对模具的表面。