IE38374B1 - Improvements in or relating to moulding glass articles - Google Patents
Improvements in or relating to moulding glass articlesInfo
- Publication number
- IE38374B1 IE38374B1 IE182373A IE182373A IE38374B1 IE 38374 B1 IE38374 B1 IE 38374B1 IE 182373 A IE182373 A IE 182373A IE 182373 A IE182373 A IE 182373A IE 38374 B1 IE38374 B1 IE 38374B1
- Authority
- IE
- Ireland
- Prior art keywords
- glass
- mould
- article
- poises
- moulding
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/12—Cooling, heating, or insulating the plunger, the mould, or the glass-pressing machine; cooling or heating of the glass in the mould
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/02—Tempering or quenching glass products using liquid
- C03B27/022—Tempering or quenching glass products using liquid the liquid being organic, e.g. an oil
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Glass Compositions (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
1446413 Moulding glass PILKINGTON BROS Ltd E COEN E J PARRY and R C STEERE 18 Oct 1973 [20 Oct 1972 16 May 1973] 48446/72 Heading C1M A glass article, e.g. a lens blank 19 (Fig. 1), is prepared by supplying a gob of molten glass to an open press mould, closing the mould to shape the gob, regulating the mould temperature and time of closure so that, on completion of moulding, the glass at the surface of the article has a viscosity of at most 10<SP>10.5</SP> poises and the glass at the centre of the article has a viscosity of at most 10<SP>8</SP> poises, opening the mould, and rapidly transferring the thermally inhomogenous moulded article from the mould, without deforming the shaped article, while the surface viscosity remains not above 10<SP>10.5</SP> poises, directly into a cooling medium in which the glass is rapidly cooled to a temperature at which the surface viscosity is at least 10<SP>12.5</SP> poises. In one embodiment (Fig. 1) molten glass gobs are supplied from shears 42 (Fig. 4, not shown) alternately to bottom mould parts 3, 23 via shoots 35, 36. The glass is shaped by pneumatically operated plungers 4, 24. Sensing and control means are provided to facilitate heating or cooling of the bottoms and sides of the lower mould parts 3, 23. Control and timing means may also be provided to synchronize the glass feeding, glass moulding and ejection of the moulded article (Fig. 7, not shown). After withdrawal of the plungers 4, 24, the lower mould parts 3, 23 are rotated (by means of tables 5, 25, on which the parts 3, 23 are mounted) about horizontal axles 6, 26, allowing the moulded products 19 to fall into cooling fluid 17 maintained, at a desired temperature, in tank 16, so that the glass is tempered. The cooling fluid may be an oil of flash point above 300 C., or molten inorganic salt. The tempered product, e.g. lens blanks 19, may be removed from tank 16 by conveyer 18, and may subsequently be annealed. In an alternative embodiment, Fig. 13, the moulded product (e.g. lens blank A) may be ejected from lower mould part 3 by a jet of compressed air from nozzle 250 (e.g. at a pressure of 0À7-4 kg./cm.<SP>2</SP>), and allowed to fall, through trajectory B, into tank 16. In either of the above embodiments the quenching may be carried out by one or more gas streams.
[GB1446413A]
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4844672 | 1972-10-20 | ||
GB2337973A GB1446413A (en) | 1972-10-20 | 1973-05-16 | Molding glass articles |
Publications (2)
Publication Number | Publication Date |
---|---|
IE38374L IE38374L (en) | 1974-04-20 |
IE38374B1 true IE38374B1 (en) | 1978-03-01 |
Family
ID=26256474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE182373A IE38374B1 (en) | 1972-10-20 | 1973-10-12 | Improvements in or relating to moulding glass articles |
Country Status (13)
Country | Link |
---|---|
JP (1) | JPS4997009A (en) |
AR (1) | AR199797A1 (en) |
BR (1) | BR7308207D0 (en) |
CA (1) | CA1016361A (en) |
CS (1) | CS183718B2 (en) |
DD (1) | DD111194A5 (en) |
DE (1) | DE2352639A1 (en) |
FR (1) | FR2207873A1 (en) |
GB (1) | GB1446413A (en) |
IE (1) | IE38374B1 (en) |
IT (1) | IT1005167B (en) |
LU (1) | LU68640A1 (en) |
NL (1) | NL7314415A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5179113A (en) * | 1974-12-31 | 1976-07-09 | Susumu Sumita | KOGAKUGARASUNOJIDOSEIKEIISOSOCHI |
JPS5278912A (en) * | 1975-12-26 | 1977-07-02 | Citizen Watch Co Ltd | Watch glass press moldling apparatus |
KR860001491B1 (en) * | 1981-10-30 | 1986-09-27 | 코오닝 그라아스 와아크스 | Process for molding glass shapes of high precision |
JP2669476B2 (en) * | 1989-12-06 | 1997-10-27 | キヤノン株式会社 | Optical element manufacturing method |
US5250099A (en) * | 1990-03-29 | 1993-10-05 | Canon Kabushiki Kaisha | Glass molding process and molding apparatus for the same |
US5215566A (en) * | 1991-01-18 | 1993-06-01 | Canon Kabushiki Kaisha | Method of manufacturing optical element |
JP2790262B2 (en) * | 1991-07-19 | 1998-08-27 | キヤノン株式会社 | Press forming method of optical element |
CN116535086B (en) * | 2023-05-16 | 2023-11-14 | 广东金鼎光学技术股份有限公司 | Mould pressing mechanism convenient to take out lens |
-
1973
- 1973-05-16 GB GB2337973A patent/GB1446413A/en not_active Expired
- 1973-10-12 IE IE182373A patent/IE38374B1/en unknown
- 1973-10-17 CA CA183,476A patent/CA1016361A/en not_active Expired
- 1973-10-18 LU LU68640D patent/LU68640A1/xx unknown
- 1973-10-19 AR AR25060573A patent/AR199797A1/en active
- 1973-10-19 IT IT1287973A patent/IT1005167B/en active
- 1973-10-19 JP JP11697573A patent/JPS4997009A/ja active Pending
- 1973-10-19 BR BR820773A patent/BR7308207D0/en unknown
- 1973-10-19 NL NL7314415A patent/NL7314415A/xx not_active Application Discontinuation
- 1973-10-19 DE DE19732352639 patent/DE2352639A1/en active Pending
- 1973-10-19 FR FR7337382A patent/FR2207873A1/fr not_active Withdrawn
- 1973-10-22 CS CS725973A patent/CS183718B2/en unknown
- 1973-10-22 DD DD17421173A patent/DD111194A5/xx unknown
Also Published As
Publication number | Publication date |
---|---|
AU6153273A (en) | 1975-04-24 |
GB1446413A (en) | 1976-08-18 |
IT1005167B (en) | 1976-08-20 |
DE2352639A1 (en) | 1974-04-25 |
CS183718B2 (en) | 1978-07-31 |
NL7314415A (en) | 1974-04-23 |
LU68640A1 (en) | 1973-12-27 |
JPS4997009A (en) | 1974-09-13 |
DD111194A5 (en) | 1975-02-05 |
BR7308207D0 (en) | 1974-07-25 |
IE38374L (en) | 1974-04-20 |
FR2207873A1 (en) | 1974-06-21 |
AR199797A1 (en) | 1974-09-30 |
CA1016361A (en) | 1977-08-30 |
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