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    Glass blank, method for manufacturing glass blank, method for manufacturing substrate for information recording medium, and method for manufacturing information recording medium
    5.
    发明专利
    Glass blank, method for manufacturing glass blank, method for manufacturing substrate for information recording medium, and method for manufacturing information recording medium 有权
    玻璃坯，制造玻璃坯的方法，用于制造用于信息记录介质的基板的方法以及用于制造信息记录介质的方法

    公开(公告)号：JP2010198690A

    公开(公告)日：2010-09-09

    申请号：JP2009043132

    申请日：2009-02-25

    Applicant: Hoya Corp ,  Hoya株式会社

    Inventor： MAEDA NOBUHIRO ,  UCHIDA KAZUYA ,  FUJIMOTO MAMORU ,  SATO TAKASHI

    IPC: G11B5/73 ,  C03B11/00 ,  G11B5/82 ,  G11B5/84

    CPC classification number: Y02P40/57

    Abstract: PROBLEM TO BE SOLVED: To provide a glass blank in which, even when a thick portion is provided at a center, a portion other than the thick portion is thinned, and a crack is prevented from occurring after press. SOLUTION: The glass blank 1 includes the disk-shaped thick portion 10, and the ring-shaped thin portion 20 which is provided, surrounding a periphery of the thick portion 10 and includes a smaller thickness than that of the thick portion 10. The thick portion 10 is convex with respect to at least one surface of the thin portion 20. On a surface on which the thin portion 20 and the thick portion 10 are formed so that a step is formed, a sloped surface extended from a flat surface portion 22 of the thin portion 20 to a topmost portion 12 of the thick portion 10 includes a curved surface 14. The curved surface and the flat surface portion 22 form a continuous surface. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：为了提供一种玻璃坯料，其中即使在中心设置厚壁部分，除了厚壁部分之外的部分变薄，并且在压制后防止发生裂纹。 解决方案：玻璃坯料1包括圆盘形厚部分10和环形薄壁部分20，该环形薄壁部分20围绕厚部分10的周边并且包括比厚部分10的厚度更小的厚度 厚部分10相对于薄壁部分20的至少一个表面是凸的。在其上形成薄壁部分20和厚壁部分10的表面上形成台阶，从平坦部分延伸的倾斜表面 薄壁部分20的表面部分22到厚壁部分10的最上部分12包括一个曲面14.弯曲表面和平坦表面部分22形成连续表面。 版权所有（C）2010，JPO＆INPIT

    MANUFACTURING METHOD AND APPARATUS FOR MOLDED ARTICLE OF GLASS, AND MANUFACTURING METHOD FOR OPTICAL PART
    6.
    发明专利
    MANUFACTURING METHOD AND APPARATUS FOR MOLDED ARTICLE OF GLASS, AND MANUFACTURING METHOD FOR OPTICAL PART 失效

    公开(公告)号：JP2002348134A

    公开(公告)日：2002-12-04

    申请号：JP2001157649

    申请日：2001-05-25

    Applicant: HOYA CORP

    Inventor： MAEDA NOBUHIRO

    IPC: G02B3/00 ,  C03B11/00 ,  C03B11/08 ,  C03B11/12 ,  C03B11/16 ,  C03B13/14 ,  C03B19/10 ,  C03B35/00 ,  C03C19/00

    Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method for molded article of glass where an improved direct press method, in which press molding is performed with a press mold after glass gob is formed with a gob metallic mold, is employed, where the press molding is performed without reheating the glass gob formed from molten glass, and where the molded article of glass can be manufactured at high productivity, to provide a manufacturing apparatus for molded article of glass, which is a suitable apparatus for performing this method, and in addition to provide a manufacturing method for optical parts manufactured from the molded articles of glass, e.g. lens blanks, obtained by this method. SOLUTION: In the manufacturing method for molded article of glass, the glass gob formed from molten glass is soaked and then is press formed. The formation and soaking of the glass gob is performed on the gob receiving part of a gob mold, satisfying the condition (1) C1-C2>C3 (wherein C1 is a heat quantity which molten glass fed into the gob receiving part of the gob mold retains, C2 is the necessary minimum heat quantity for press molding the gob, and C3 is the total quantity of heat removed from the glass during the formation and soaking), or satisfying the condition that the heat capacity of the gob receiving part is less than that of the glass gob and the part is substantially insulated. In the manufacturing method for optical parts, the parts are manufactured by applying a grinding and polishing process to the molded article of glass manufactured by the above method. The manufacturing apparatus for the molded article of glass is disclosed.

    PRODUCTION OF GLASS PLATE AND DEVICE FOR PRODUCING THE SAME
    7.
    发明专利
    PRODUCTION OF GLASS PLATE AND DEVICE FOR PRODUCING THE SAME 失效

    公开(公告)号：JPH1053426A

    公开(公告)日：1998-02-24

    申请号：JP20505196

    申请日：1996-08-02

    Applicant: HOYA CORP

    Inventor： MAEDA NOBUHIRO ,  UCHIDA KAZUYA ,  ENDO SHIGEAKI

    IPC: C03B17/06 ,  G11B5/73 ,  G11B5/82

    Abstract: PROBLEM TO BE SOLVED: To provide a device for producing a glass plate, enabling to produce the glass plate little in curvature. SOLUTION: This device for producing a glass plate is provided with a shaping form 2 for shaping molten glass 3 into a plate-like shape and with pulling rollers 6 for pulling out the cooled glass plate 3', wherein the form 2 and the pulling rollers 6 are arranged at a space therebetween the in the vertical direction. Therein, a plurality of bulkheads 7 for separating the oven room 6 in the vertical direction are arranged, and a room temperature controller for controlling the temperature of the room is disposed for each separated room to control an average cooling speed between the glass transition point of the glass and its strain point to 1.2 deg.C/sec.

    APPARATUS FOR PRODUCING GLASS PLATE
    9.
    发明专利
    APPARATUS FOR PRODUCING GLASS PLATE 失效

    公开(公告)号：JPH02225326A

    公开(公告)日：1990-09-07

    申请号：JP13809389

    申请日：1989-05-31

    Applicant: HOYA CORP

    Inventor： MAEDA NOBUHIRO ,  SAGAWA FUMIHIKO ,  KARIYA HIROYUKI ,  MAEDA TOSHIO

    IPC: C03B17/06

    Abstract: PURPOSE:To prevent deformation and uneven wall thickness from occurring by arranging shielding plates adjacently to a glass plate in an apparatus for pulling out the glass plate downward in the vertical direction, protecting the glass plate from convection and suppressing nonuniform cooling. CONSTITUTION:The above-mentioned apparatus for producing a glass plate is formed from a forming unit 2 for forming molten glass 3 into the shape of a plate, tension rollers 6 for drawing platy glass 3', shielding plates 7, etc. The aforementioned shielding plates 7 are made of a metal or refractory and arranged parallel and adjacently to the glass plate 3' from both sides thereof under the above-mentioned forming unit 2. The aforementioned forming unit 2 and tension rollers 6 are arranged in the vertical directions at an interval.

    Glass blank, method for producing the same, method for producing substrate for information recording medium, and method for producing information recording medium
    10.
    发明专利
    Glass blank, method for producing the same, method for producing substrate for information recording medium, and method for producing information recording medium 有权
    玻璃棉，其生产方法，用于生产用于信息记录介质的基材的方法，以及用于生产信息记录介质的方法

    公开(公告)号：JP2010195649A

    公开(公告)日：2010-09-09

    申请号：JP2009044342

    申请日：2009-02-26

    Applicant: Hoya Corp ,  Hoya株式会社

    Inventor： MAEDA NOBUHIRO ,  UCHIDA KAZUYA

    IPC: C03B11/08 ,  G11B5/73 ,  G11B5/82 ,  G11B5/84

    Abstract: PROBLEM TO BE SOLVED: To provide a glass blank with which cracking is suppressed during pressing and to provide a method for producing the same. SOLUTION: The glass blank 1 has a thin part 10 having a disk-like shape and a thick part 12 provided along the peripheral edge part of the thin part 10. When the glass blank is processed into a substrate for an information recording medium, the thick part 12 is removed. The method for producing the glass blank is a method for producing the glass blank 1. The substrate for an information recording medium is produced by using the glass blank 1 or the glass blank 1 produced by the method for producing the glass blank. Further, in the method for producing the information recording medium, a substrate produced by a method for producing a substrate for an information recording medium is used. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种在压制过程中抑制裂纹的玻璃坯料，并提供其制造方法。

    解决方案：玻璃坯料1具有圆形状的薄部分10和沿着薄部分10的周缘部分设置的厚部分12.当玻璃坯料被加工成用于信息记录的基板 中等厚度的部分被去除。 玻璃坯料的制造方法是玻璃坯料1的制造方法。信息记录介质用基材是使用玻璃坯料1或玻璃坯料1制造的。 此外，在信息记录介质的制造方法中，使用通过信息记录介质用基板的制造方法制造的基板。 版权所有（C）2010，JPO＆INPIT

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