Title:
GLASS GOB MANUFACTURING METHOD, GLASS GOB MOLDING DEVICE, MATERIAL FOR PRESS MOLDING, GLASS MOLDED ARTICLE, SPHERICAL PREFORM, AND OPTICAL ELEMENT MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2013/111838
Kind Code:
A1
Abstract:
When a glass gob is manufactured by sequentially supplying a molten glass gob (200) with a given weight to each of a plurality of molding parts (104) each of which has a plurality of gas jetting ports (104a) in a molding surface (104b) and has moved below a molten glass supply part (102) with the rotational driving of a turn table (106) on which the molding parts (104) are provided at regular intervals along a circumferential direction, the molten glass gob (200) with the given weight is dropped each time from the molten glass supply part (102), and the rotational driving of the turn table (106) is controlled such that the turn table continuously rotates while being accelerated or decelerated according to the timing when the molten glass gob (200) is dropped, or continuously rotates at a constant speed. This glass gob manufacturing method makes it possible to further improve productivity and manufacture more glass gobs within a given period of time without impairing molding accuracy.
Inventors:
IGUCHI YOSHINORI (JP)
Application Number:
PCT/JP2013/051510
Publication Date:
August 01, 2013
Filing Date:
January 24, 2013
Export Citation:
Assignee:
HOYA CORP (JP)
International Classes:
C03B11/02; C03B11/00; C03B11/08; C03B11/16
Foreign References:
| JP2004300020A | 2004-10-28 | |||
| JPH07309630A | 1995-11-28 | |||
| JP2007223898A | 2007-09-06 | |||
| JP2009046360A | 2009-03-05 | |||
| JP2005298262A | 2005-10-27 |
Attorney, Agent or Firm:
WILLFORT INTERNATIONAL (JP)
Patent business corporation Wil photograph international patent firm (JP)
Patent business corporation Wil photograph international patent firm (JP)
Download PDF:
Claims: