Apparatus and method for manufacturing glass optical element

Patent metadata

Field	Value
Publication number	US-9475721-B2
Application number	US-201414323832-A
Country	US
Kind code	B2
Filing date	Jul 3, 2014
Priority date	Jun 18, 2012
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

An apparatus for manufacturing a glass optical element includes: a heating unit that heats a glass material; a pressurizing unit that pressurizes the glass material; a cooling unit that cools the glass material; a molding room in which the heating unit, the pressurizing unit, and the cooling unit are located; an inert-gas supplying unit that forms a plurality of flows of an inert gas within the molding room by blowing the inert gas in a plurality of directions crossing each other; and an inert-gas emitting unit that emits, from within the molding room, the inert gas supplied into the molding room by the inert-gas supplying unit.

First claim

What is claimed is:

1. An apparatus for manufacturing a glass optical element, the apparatus comprising:
a molding room having front and back plates facing one another;
means for sequentially heating, pressurizing and cooling a glass material located in a mold set as the mold set moves along a transportation path in the molding room;
an elongated inert gas supply conduit located in the molding room and having a longitudinal axis extending parallel to the transportation path, the inert gas supply conduit having outlets for releasing inert gas into the molding room in a plurality of directions which cross one another at different points along the transportation path; and
a deflector that deflects at least some of the inert gas released by the outlets towards the mold set, the deflector being located on at least one of the front and back plates of the molding room.

2. The apparatus of claim 1 , wherein the means comprises a heating unit that heats the glass material, a pressurizing unit that pressurizes the glass material and a cooling unit that cools the glass material.

3. The apparatus of claim 1 , further including a gas supply passage for supplying the inert gas to the inert gas supply conduit.

4. The apparatus of claim 1 , further including an inert gas emitting unit that allows the inert gas to exit the molding room.

5. The apparatus of claim 4 , wherein the inert gas emitting unit comprises at least one opening extending to a location external to the molding room.

6. The apparatus of claim 4 , wherein the inert gas emitting unit includes an introduction port of a heater.

7. The apparatus of claim 6 , wherein the inert gas emitting unit further includes a gas emission port provided independently from the introduction port of the heater.

8. The apparatus of claim 1 , wherein the inert gas supply conduit has first and second pluralities of outlets for releasing the inert gas into the molding room in a plurality of directions which cross one another, the first plurality of outlets being located at spaced locations relative to one another along the longitudinal axis of the inert gas supply conduit, the second plurality of outlets being located at spaced locations relative to one another along the longitudinal axis of the inert gas supply conduit.

9. The apparatus of claim 1 , wherein the deflector moves between a position where it deflects the flow of the inert gas released by the inert gas supply conduit toward the mold set and a second position wherein the deflector does not deflect the flow of the inert gas released by the inert gas supply conduit toward the mold set.

10. The apparatus of claim 1 , wherein the elongated inert gas supply conduit is stationary.

11. The apparatus of claim 10 , wherein the elongated inert gas supply conduit is physically separate from the mold set.

12. The apparatus of claim 1 , wherein the deflector is a first deflector and wherein the apparatus further comprising a second deflector, the first and second deflectors being located on the front and back plates of the molding room, respectively.

13. A method for manufacturing a glass optical element including heating, pressurizing, and cooling a glass material within a molding room, the method comprising:
sequentially heating, pressurizing and cooling a glass material located in a mold set as the mold set moves along a transportation path in the molding room, the molding room having front and back plates facing one another;
supplying an inert gas into the molding room using an elongated gas supply conduit located in the molding room and having a longitudinal axis extending parallel to the transportation path, the supply conduit having outlets for releasing the inert gas into the molding room in a plurality of directions which cross one another at different points along the transportation path; and
deflecting at least some of the inert gas released by the outlets towards the mold set using a deflector located on at least one of the front and back plates of the molding room.

14. The method of claim 13 , wherein the glass material is heated by a heating unit, pressurized by a pressurizing unit that pressurizes the glass material and cooled by a cooling unit that cools the glass material.

15. The method of claim 13 , further including emitting the inert gas introduced into the molding room to a location outside of the molding room.

16. The method of claim 13 , wherein the supply conduit has first and second pluralities of outlets for releasing the inert gas into the molding room in a plurality of directions which cross one another, the first plurality of outlets being located at spaced locations relative to one another along the longitudinal axis of the gas supply conduit, the second plurality of outlets being located at spaced locations relative to one another along the longitudinal axis of the gas supply conduit.

17. The method of claim 13 , wherein the elongated inert gas supply conduit is stationary.

18. The method of claim 17 , wherein the elongated inert gas supply conduit is physically separate from the mold set.

19. The process of claim 13 , wherein the deflector is a first deflector and at least some of the inert gas released by the outlets is deflected towards the mold set by a second deflector, the first and second deflectors being located on the front and back plates of the molding room, respectively.

Assignees

• Olympus Corp

Inventors

• Yamada Kiyomi
• Watanabe Takashi
• Nakahama Masato

Classifications

• C03B2215/86

  Linear series of multiple press moulds · CPC title

• C03B11/005 Primary

  Pressing under special atmospheres, e.g. inert, reactive, vacuum, clean · CPC title

• C03B2215/66

  Means for providing special atmospheres, e.g. reduced pressure, inert gas, reducing gas, clean room · CPC title