US2596990A - Glassworking methods - Google Patents
Glassworking methods Download PDFInfo
- Publication number
- US2596990A US2596990A US129195A US12919549A US2596990A US 2596990 A US2596990 A US 2596990A US 129195 A US129195 A US 129195A US 12919549 A US12919549 A US 12919549A US 2596990 A US2596990 A US 2596990A
- Authority
- US
- United States
- Prior art keywords
- mold
- charge
- charges
- article
- glassworking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title description 10
- 238000000151 deposition Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 238000003825 pressing Methods 0.000 description 7
- 239000000470 constituent Substances 0.000 description 6
- 239000006060 molten glass Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000013547 stew Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/14—Transferring molten glass or gobs to glass blowing or pressing machines
Definitions
- the present invention relates to improvements in glass article-pressing methods.
- the primary object of the present invention is the provision of an improved method of glassworking which is free of the faults above described.
- any constituents which volatilize or stew out of the Successive glass charges and acmark can be substantially mitigated where the deposited constituents are distributed relatively uniformly over the entire mold surface.
- a further advantage of the present invention is that uneven heating of the mold as a result of the repeated deposition of glass charges on the identical mold surface area is avoided, and the life of the mold thereby is considerably lengthened. Moreover, the breakage of ware prior to annealing, because of strains set up therein by reason of a non-uniform'mold temperature, can thus be reduced to a minimum.
- a simple way to carry out applicants method when, for example, pressing television picturetube panels on an indexing-type rotating table press is to mount the molds for rotary movement about their own axes and to then give each mold a turning movement through a 15 to 30 arc following each use.
- the trough used to direct the charges into the mold can from time to time be slightly shifted relative to the mold to successively deposit the respective charges on different mold surface portions. In either event, the operation can be carried out manually, or suitable provision can be made to effect the same automatically.
- the invention is of course more readily applicable to the manufacture of articles that are circular in cross-section or that are formed with plungers which are circular in cross-section; but it is not necessarily limited to the manufacture of such articles. If the articles to be pressed require a rotary position of orientation with respect to the plunger, as is the case with a square or a rectangular-shaped article, the method can be carried out by shifting of the feeder trough, as above described, or, alternatively, by from time to time imparting uniform turning movements to both the mold and, it necessary, the plunger about their common axes.
- the method of forming glass articles which includes successively feeding a mold with a series of charges of molten glass, depositing at least one charge of the series on one surface portion of the mold and forming such charge into an article, and depositing a subsequent charge of the series on another surface portion of the mold difierent at least in part from said one surface portion and forming the latter charge into a similar article.
- the method of forming glass articles which includes successively feeding a mold with a series of charges of molten glass by depositing each charge of the series on a surface portion of the mold diiferent at least in part from that on which the preceding charge was deposited, and forming an article in the mold, following the deposit of each charge therein.
- the method of forming a plurality of glass articles successively in a press mold which includes depositing a charge of molten glass onto one surface area of the mold, pressing such charge into the desired article, removing the article from the mold, depositing another charge of molten glass onto a surface area of the mold at least in part differing from the surface area onto which the preceding charge was deposited, and pressing the last-deposited charge into the desired article.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Description
Patented May 20, 1952 UNiT-E o srAr ss ration of New York No Drawing. Applicationfibveniliefta194d, Serial No. 129,195
5 Claims. (of. 49-85 The present invention relates to improvements in glass article-pressing methods.
In the automatic pressing of glassware there is frequently experienced, as the use ofamold is lico ntinued, a gradual development of a haze pat- "tern-over a greater or smaller portion of the surface of the article being produced. The formation of this haze pattern is generally encountered with certain types of glasses, especially those which contain constituents that are more or less volatile at the pressing temperatures. Examination of molds producing such haze patterns .indicates that a deposit has been built up on the mold surface, so far as can be determined, by the condensation and accumulation thereon of constituents that have been volatilized or stewed out of the charges of molten glass as they have been successively pressed in the molds. Apparently, even though the plunger in pressing each charge may tend to shift these constituents from their initial area of deposition, it nevertheless, because the successive charges are all deposited in the mold in the same position, always shifts them in the same directions and to the same location. The result is that, after a limited period of operation, a sufficient quantity of such volatilized constituents accumulates to result in the creation of a loading mark in the mold and the accompanying haze pattern on the pressed ware surfaced.
Although the development of such a haze pattern is not particularly objectionable in many articles so long as it remains relatively unnoticeable to the casual observer, it becomes of primary importance in those articles such as television picture-tube panels and the like where a high degree of surface quality is renuired. In such cases it has been the usual practice heretofore to replace each mold after it has been in use for only a relatively short time and before any significant deposit has been formed thereon, with a resulting increase in downtime and operating cost. It has been proposed to alleviate this condition by making provision for periodically brushing or otherwise cleaning the molds as they are being used, but such practice has not been found particularly helpful or feasible.
The primary object of the present invention is the provision of an improved method of glassworking which is free of the faults above described.
It has now been discovered that the formation of the deposit on the mold surface can be materially reduced and even substantially avoided, with a consequent minimization or elimination ha'z pattern in thfe pifes'sed ware, by feeding the-'succes's'ive-charges of molten glass in such away that each succeeding charge or group of charges is positioned on a surface portion of the mold different from that on which the preceding charge-or group of charges was deo'r tlr -prbeu uon or a.
osited. Any constituents which volatilize or stew out of the Successive glass charges and acmark can be substantially mitigated where the deposited constituents are distributed relatively uniformly over the entire mold surface.
A further advantage of the present invention is that uneven heating of the mold as a result of the repeated deposition of glass charges on the identical mold surface area is avoided, and the life of the mold thereby is considerably lengthened. Moreover, the breakage of ware prior to annealing, because of strains set up therein by reason of a non-uniform'mold temperature, can thus be reduced to a minimum.
A simple way to carry out applicants method when, for example, pressing television picturetube panels on an indexing-type rotating table press is to mount the molds for rotary movement about their own axes and to then give each mold a turning movement through a 15 to 30 arc following each use. Alternatively, the trough used to direct the charges into the mold can from time to time be slightly shifted relative to the mold to successively deposit the respective charges on different mold surface portions. In either event, the operation can be carried out manually, or suitable provision can be made to effect the same automatically.
The invention is of course more readily applicable to the manufacture of articles that are circular in cross-section or that are formed with plungers which are circular in cross-section; but it is not necessarily limited to the manufacture of such articles. If the articles to be pressed require a rotary position of orientation with respect to the plunger, as is the case with a square or a rectangular-shaped article, the method can be carried out by shifting of the feeder trough, as above described, or, alternatively, by from time to time imparting uniform turning movements to both the mold and, it necessary, the plunger about their common axes.
When one of the foregoing improved methods is followed, the need for cleaning the mold is substantially obviated, the mold life is prolonged, and more and better ware is produced.
What is claimed is:
1. The method of forming glass articles, which includes successively feeding a mold with a series of charges of molten glass, depositing at least one charge of the series on one surface portion of the mold and forming such charge into an article, and depositing a subsequent charge of the series on another surface portion of the mold difierent at least in part from said one surface portion and forming the latter charge into a similar article.
2. The method of forming glass articles, which includes successively feeding a mold with a series of charges of molten glass by depositing each charge of the series on a surface portion of the mold diiferent at least in part from that on which the preceding charge was deposited, and forming an article in the mold, following the deposit of each charge therein.
3. A method such as defined by claim 2, wherein the charges are all fed from the same point of 4 delivery and the mold is shifted with respect to such point for each successively fed charge.
4. A method such as defined by claim 2", wherein the mold is stationary and the point of delivery of the charges is shifted.
5. The method of forming a plurality of glass articles successively in a press mold, which includes depositing a charge of molten glass onto one surface area of the mold, pressing such charge into the desired article, removing the article from the mold, depositing another charge of molten glass onto a surface area of the mold at least in part differing from the surface area onto which the preceding charge was deposited, and pressing the last-deposited charge into the desired article.
CHARLES W.DOYI.LE.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,015,219 Gray et a1. Sept. 24, 1935 2,162,800 Crimmel June 20, 1939
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US129195A US2596990A (en) | 1949-11-23 | 1949-11-23 | Glassworking methods |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US129195A US2596990A (en) | 1949-11-23 | 1949-11-23 | Glassworking methods |
GB477352A GB695266A (en) | 1952-02-22 | 1952-02-22 | Glassworking methods |
Publications (1)
Publication Number | Publication Date |
---|---|
US2596990A true US2596990A (en) | 1952-05-20 |
Family
ID=26239364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US129195A Expired - Lifetime US2596990A (en) | 1949-11-23 | 1949-11-23 | Glassworking methods |
Country Status (1)
Country | Link |
---|---|
US (1) | US2596990A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2921860A (en) * | 1954-12-09 | 1960-01-19 | Corning Glass Works | Opal glass |
US3005122A (en) * | 1959-09-23 | 1961-10-17 | Owens Illinois Glass Co | Cathode ray tube envelope |
US3533905A (en) * | 1967-02-13 | 1970-10-13 | Carborundum Co | Fused-cast composite refractory bodies and process of producing same |
WO1981001142A1 (en) * | 1979-10-26 | 1981-04-30 | Timo Sarpaneva | Method for producing decorative glass objects |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2015219A (en) * | 1934-05-31 | 1935-09-24 | Corning Glass Works | Method of forming glassware |
US2162800A (en) * | 1935-01-24 | 1939-06-20 | Alvie C Crimmel | Method and apparatus for forming large mass glassware by gob dropping |
-
1949
- 1949-11-23 US US129195A patent/US2596990A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2015219A (en) * | 1934-05-31 | 1935-09-24 | Corning Glass Works | Method of forming glassware |
US2162800A (en) * | 1935-01-24 | 1939-06-20 | Alvie C Crimmel | Method and apparatus for forming large mass glassware by gob dropping |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2921860A (en) * | 1954-12-09 | 1960-01-19 | Corning Glass Works | Opal glass |
US3005122A (en) * | 1959-09-23 | 1961-10-17 | Owens Illinois Glass Co | Cathode ray tube envelope |
US3533905A (en) * | 1967-02-13 | 1970-10-13 | Carborundum Co | Fused-cast composite refractory bodies and process of producing same |
WO1981001142A1 (en) * | 1979-10-26 | 1981-04-30 | Timo Sarpaneva | Method for producing decorative glass objects |
US4367086A (en) * | 1979-10-26 | 1983-01-04 | Timo Sarpaneva | Method for producing decorative glass objects |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2596990A (en) | Glassworking methods | |
US4599245A (en) | Method for making large-surface silicon crystal bodies | |
US1770335A (en) | Method and apparatus for making blown-glass articles | |
US2758421A (en) | Chute for conveying molten glass | |
US2749666A (en) | Method of feeding glass batch materials | |
ES476374A1 (en) | Method and apparatus for feeding a glass melting furnace | |
US4193784A (en) | Method of loading containers into an annealing lehr | |
US2867888A (en) | Method of firing alumina ceramics | |
CN113860755A (en) | Continuous production process of colored glaze glass capable of automatically spraying colored glaze | |
US2978839A (en) | Apparatus for finishing apertured glass articles | |
US2293860A (en) | Method of feeding glass | |
DE3103459A1 (en) | METHOD FOR PRODUCING HOLLOW GLASS BODIES | |
US2926459A (en) | Method of forming a hollow glass article | |
JPH067875A (en) | Molybdenum of molybdenum alloy wire net and manufacture of same | |
DE901587C (en) | Process for the successive loading of molds with glass fluxes | |
US2263127A (en) | Glass charging and pressing apparatus and method | |
GB1310249A (en) | Sintering and melting of glass forming materials | |
US2732665A (en) | P cassell | |
US1842511A (en) | Process and apparatus for producing sheets of glass | |
JPS6452344A (en) | Processing method for oxide or ceramic superconductor into wire | |
US1888393A (en) | Process for pushing glass bottles | |
US1881825A (en) | Transferring and forming machine | |
US1569466A (en) | Sheet-glass-rolling apparatus | |
JPH0940429A (en) | Sandwich glass product and its forming method | |
DE3406556A1 (en) | Process for producing tiles |