公开(公告)号：US20110277508A1

公开(公告)日：2011-11-17

申请号：US13070509

申请日：2011-03-24

申请人： Makoto OSAWA ,  Akira MURAKAMI ,  Nobuhiro SUGIYAMA ,  Takashi SATOU ,  Naomi MATSUMOTO ,  Youichi HACHITANI ,  Kinobu OSAKABE ,  Hideki ISONO ,  Hidekazu TANINO ,  Takao MOTOHASHI

发明人： Makoto OSAWA ,  Akira MURAKAMI ,  Nobuhiro SUGIYAMA ,  Takashi SATOU ,  Naomi MATSUMOTO ,  Youichi HACHITANI ,  Kinobu OSAKABE ,  Hideki ISONO ,  Hidekazu TANINO ,  Takao MOTOHASHI

IPC分类号： C03B11/05 ,  C03B21/02 ,  C03B11/08

CPC分类号： G11B5/8404 ,  C03B7/10 ,  C03B11/088 ,  C03B2215/11 ,  C03B2215/12 ,  C03B2215/70 ,  C03C3/087 ,  C03C3/093 ,  C03C3/095 ,  C03C3/097 ,  G11B5/7315 ,  Y02P40/57

摘要： Provided is a method of manufacturing a glass blank for a magnetic recording medium glass substrate, including: manufacturing a glass blank by at least press molding a falling molten glass gob with a pair of press molds both so as to face each other in a direction perpendicular to a direction in which the molten glass gob falls, in which: the molten glass gob is formed of a glass material having a glass transition temperature of 600° C. or more; and when the press molding is carried out so that the molten glass gob is completely extended by pressure and molded into a flat glass between press-molding surfaces of the pair of press molds, at least a region in contact with the flat glass in each of the press-molding surfaces of the pair of press molds forms a substantially flat surface. Also provided are a method of manufacturing a magnetic recording medium glass substrate and a method of manufacturing a magnetic recording medium each using the method of manufacturing a glass blank for a magnetic recording medium glass substrate.

摘要翻译： 提供一种制造用于磁记录介质玻璃基板的玻璃坯料的方法，包括：通过至少用一对压模模压落下的熔融玻璃料块来制造玻璃坯料，以便在垂直方向上彼此面对 在熔融玻璃料滴落的方向上，熔融玻璃料滴由玻璃化转变温度为600℃以上的玻璃材料形成， 并且当进行压制成型以使熔融玻璃料滴完全被压力延伸并且在一对压模的压制成型表面之间模制成平板玻璃时，至少在平板玻璃中与平板玻璃接触的区域 一对压模的加压成形面形成大致平坦的表面。 还提供了使用制造用于磁记录介质玻璃基板的玻璃坯料的方法来制造磁记录介质玻璃基板的方法和制造磁记录介质的方法。

公开(公告)号：US20110283739A1

公开(公告)日：2011-11-24

申请号：US13071212

申请日：2011-03-24

申请人： Makoto OSAWA ,  Akira MURAKAMI ,  Nobuhiro SUGIYAMA ,  Takashi SATOU ,  Hideki ISONO ,  Kinobu OSAKABE ,  Hidekazu TANINO ,  Takao MOTOHASHI

发明人： Makoto OSAWA ,  Akira MURAKAMI ,  Nobuhiro SUGIYAMA ,  Takashi SATOU ,  Hideki ISONO ,  Kinobu OSAKABE ,  Hidekazu TANINO ,  Takao MOTOHASHI

IPC分类号： C03B7/14 ,  C03B11/05 ,  C03B7/10 ,  C03C17/00

CPC分类号： G11B5/8404 ,  C03B7/10 ,  C03B11/088 ,  C03B2215/70 ,  Y02P40/57

摘要： Provided are a method of manufacturing a glass blank, the method including press-molding a molten glass gob under a state in which a separation mark formed on an upper surface of the molten glass gob faces at least one of the molding surface sides of a pair of press molds arranged facing each other in a horizontal direction, when the molten glass gob falls into a space between the pair of press molds, and a method of manufacturing a magnetic recording medium substrate and a method of manufacturing a magnetic recording medium, both using the glass blank.

摘要翻译： 提供一种制造玻璃坯料的方法，该方法包括在形成在熔融玻璃料粒的上表面上的分离标记面对至少一个成型表面侧的状态下对熔融玻璃料滴进行加压成型 当熔融玻璃料滴落入一对压模之间的空间时，在水平方向上彼此相对布置的压模，以及制造磁记录介质基板的方法和制造磁记录介质的方法，均使用 玻璃空白。

公开(公告)号：US20120247155A1

公开(公告)日：2012-10-04

申请号：US13296618

申请日：2011-11-15

申请人： Akira MURAKAMI ,  Makoto OSAWA ,  Nobuhiro SUGIYAMA ,  Takashi SATOU ,  Hidekazu TANINO ,  Hideki ISONO ,  Kinobu OSAKABE ,  Takao MOTOHASHI

发明人： Akira MURAKAMI ,  Makoto OSAWA ,  Nobuhiro SUGIYAMA ,  Takashi SATOU ,  Hidekazu TANINO ,  Hideki ISONO ,  Kinobu OSAKABE ,  Takao MOTOHASHI

IPC分类号： C03C17/00 ,  C03C19/00 ,  C03B11/05

CPC分类号： C03B11/088 ,  C03B7/11 ,  C03B2215/69 ,  C03B2215/70 ,  C03C3/085 ,  C03C19/00 ,  C03C2203/00 ,  C03C2204/08 ,  Y02P40/57

摘要： A method of manufacturing a glass blank for a magnetic recording medium glass substrate in which, after a pair of press molds placed so as to be opposed to each other in a horizontal direction with press-molding surfaces thereof and the temperatures of the press-molding surfaces being substantially the same are brought into contact with a molten glass gob substantially at the same time, press molding is carried out to produce plate glass and the plate glass continues to be pressed with the pair of molds, and then, when the plate glass is taken out, the duration time of pressing the plate glass is controlled so that the flatness of the glass blank is 10 μm or less, and a method of manufacturing a magnetic recording medium glass substrate, a method of manufacturing a magnetic recording medium, and an apparatus for manufacturing a glass blank for a magnetic recording medium glass substrate using the same.

摘要翻译： 一种制造用于磁记录介质玻璃基板的玻璃坯料的方法，其中在通过其压制成型表面在水平方向上彼此相对放置的一对压模之后，将压制成型 基本相同的表面基本上与熔融玻璃料滴接触，同时进行压制成型以制备平板玻璃，并且用一对模具继续压制平板玻璃，然后当平板玻璃 控制平板玻璃的压制持续时间，使得玻璃坯料的平坦度为10μm以下，制造磁记录介质玻璃基板的方法，磁记录介质的制造方法和 一种用于制造使用其的磁记录介质玻璃基板的玻璃坯料的设备。