CA1070950A - Support for bushing for containing heat-softenable material - Google Patents
Support for bushing for containing heat-softenable materialInfo
- Publication number
- CA1070950A CA1070950A CA235,931A CA235931A CA1070950A CA 1070950 A CA1070950 A CA 1070950A CA 235931 A CA235931 A CA 235931A CA 1070950 A CA1070950 A CA 1070950A
- Authority
- CA
- Canada
- Prior art keywords
- bushing
- bottom wall
- members
- supporting means
- walls
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/08—Bushings, e.g. construction, bushing reinforcement means; Spinnerettes; Nozzles; Nozzle plates
- C03B37/083—Nozzles; Bushing nozzle plates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Inorganic Fibers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A support is provided for a bushing containing heat-softenable material from which fibers are attenuated through tips in the bottom wall of the bushing. Especially with larger bushings and those used to melt heat-softenable material requiring higher temperatures, the bushing bottoms tend to sag or creep over a period of time. To overcome this, a bushing is provided with a plurality of internal supports connected to the bottom and supporting the same against sag or creep.
The supports can be in the form of tubes extending between side walls of the bushing with connecting members joining the tubes to the bushing bottom wall. In a preferred form, refractory rods are extended through the tubes for additional support.
A support is provided for a bushing containing heat-softenable material from which fibers are attenuated through tips in the bottom wall of the bushing. Especially with larger bushings and those used to melt heat-softenable material requiring higher temperatures, the bushing bottoms tend to sag or creep over a period of time. To overcome this, a bushing is provided with a plurality of internal supports connected to the bottom and supporting the same against sag or creep.
The supports can be in the form of tubes extending between side walls of the bushing with connecting members joining the tubes to the bushing bottom wall. In a preferred form, refractory rods are extended through the tubes for additional support.
Description
~ ~7~951~ :
This ~nyent~on relates to ~upport~ ~or conta~ners for heat-so~tena~le ~ater~al and more ~peci~ically to internal supports ~or bus~ings ~rom ~hich ~lass ;e~bers are at~enuated.
There has been a trend in recent years toward making textile glass ~ilaments or ~ibers o~ smaller diameter, which smaller ~laments have a nu~er o~ advantages well recognized in the art. As the ~iber diameter decreases, it i5 advantageous to attenuate more filaments from each bushing to maintain glass through-put of the bushing at reasonable rates. This has re-sulted in larger bushings with correspondingly larger tipsections or bottom walls to accommodate the larger number of tips from which the filaments are attenuated. The larger bottom walls are subjected to a greater o~erall load and tend to sag or creep sooner than bottom walls of smaller areas.
Also in recent years, there has been a need for filaments made of more highly refractory material so that such filaments can be used in environments at more highly elevated temperatures. Such filaments must be attenuated at higher temperatures with the heat-so~tenable material from which they 20 are made correspondingly being softened or melted in the ~ ;
bushing at higher temperatures. Such temperatures have a marked tendency to cause the bushing bottom wall to sag or creep at even greater rates, depending upon the temperatures involved. This is true even through the bushing is made of the most h;gh temperature resistant metal alloys known from which ~ushings can be fabricated.
Attempts have been made heretofore to overcome this problem o~ creep or sag through special bushing designs or through supports under the bushin~ ~ottoms. However, such ~ 1 -, 1C~7~ 5(~
attempts have met with limited success, often being ineffective to extencl the bushing life appreciably without excessive creep or sag resulting. 5uch supports also have tended to interfere with the heat pattern o the bushing bottom or have physically interfered with the attenuation of fibers, resulting in a tendency to disrupt the fiber-forming operation. Still other a-ttempts to reduce sag have required an excessive amount of the extremely expensive alloys of which the bushings are made.
It is, therefore, a principal object of the invention to obviate or omitigate the above disadvantages.
1~71195~
According to -the present invention a bushing comprises a wall structure having upper and lower sections said wall struc-ture being shaped and dim~nsioned to permit the flow therethrough of molten mineral material for attenuation into fibers; supporting means adapted for connection to said lower section, said supporting means comprising a member extending generalLy between an area defined by said wall s-tructure above said lower section thereof and means connecting said member to said lower section.
In the preferred embodiments, the present invention provides an improved bushing support which is highly effective in preventing or greatly reducing sag or creep in a bushing bottom wall. The support also does not interfere with the heat pattern of the bushing or otherwise interfere with the fiber-forming operation. The bushing support includes an elogate, internal member, preferably hollow, which extends between upright walls of the bushing, above the bottom wall thereof.
Connecting members or plates are affixed to the elongate members and to the bushing bottom wall below these members. The elongate members preferably extend between opposite upright side walls transversely to the bushing bottom with the connecting members being affixed to the bushing bottom wall between the rows of bushing tips which extend downwardly therefrom. In a preferred form, rods of highly-refractory ceramic material extend through the hollow, elongate members and beyond the bushing up-right walls to provide additional support.
~7~315~
EmbodimentS of the invention will now be described by way of example only with reference to the accompanying drawings in which: -Figure 1 is a somewhat schematic v:i.ew in elevation,with parts broken away and with parts in section, of overall apparatus for processing glass or other heat~softenable material into fine, continuous filaments;
Figure 2 is a somewhat enlarged, schematic view in transverse cross sect.ion taken along the line 2-2 of Figure l;
Figure 3 is a fragmentary view in cross section taken along the line 3-3 of Figure 2; and Figure 4 is a somewhat schematic side view in elevation of the bushing shown in Figures 1-3.
~07(~S(~
While the invention has particular utility in heat conditioning and processing heat-softenable glass for attenuation into fine, textile filaments, the invention also may be utilized for heat conditioning and processing other mineral materials at ~;
elevated temperatures in a container which is subjected to creep or sag.
Referring particularly to Figure 1, a container and specifically a bushing 10 is arranged to be supplied with and contain heat-softenable material, such as glass, and especially glass suitable for attenuation into fine, continucus filaments suitable for textile uses.
The bushing 10 is located below and in communication ~ ~.
with a forehearth 12 which receives refined, heat-softened or ~:
molten glass from a mel~ing furnace 14. The bushing 10 may also ~ ~
be associated with other glass heating arrangements, including :
spheres or pieces of pre-refined glass melted in a region abov~
the bushing at a rate at which the glass is withdrawn or attenuated from the bushing in a plurality of streams. Streams 16 of glass are attenuated into filaments 18 and are collected into a s-trand 20 by means of a gathering shoe 22 after a suitable binder or the like is applied to the individual filaments 18 by an applicator 24. The strand 20 is then wound upon a tube or sleeve 26 mounted on a mandrel 28 and driven by suitable drive means in a winding machine housing 30. The strand 20 is traversed lengthwise of the tube 26 by a level wind device 32, as is known in the art.
The bushing 10 is mounted in communication with an ~ :
opening 34 in the bottom of the forehearth 12. More specifically, the bushing 10 is mounted in castable refractory bodies 36 and 38 which are supported by frames 40 and 42 suitably affixed to the :;
~o7C)~5(~
forehearth supporting structure. In this instance, the bushing 10 has horizontally-extending flanges 44 and 46 which are located between the castable bodies 36 and 38 and the refractory of the forehearth 12 forrning -the opening 34. Upright side walls 48 and 50 and upright end walls 52 and 54 extend downwardly from the horizontal flanges and terminate at their lower edges in a bottom wall or tip section 56. A multiplicity of fiber-forming tips 58 extend downwardly from the tip section 56 and have suitable orifices or passages 60 (Figure 3) formed therein through which heat-softened material is attenuated into the filaments 18.
The bushing 10 is heated by current supplied to the walls of the bushing through terminals 62 (Figure 4) located at the ends thereof, as is known in the art.
When the bushing is in operation for a period of time, the bottom wall or tip section 56 tends to creep or ~ag particu-larly in the center, even when made of the highest temperature resistant alloys of platinum and rhodium known in the art. Other alloys exist which are capable of withstanding higher temperatures~
for longer periods of time but such alloys are otherwise unsuitable for use in bushings, such as the bushing 10. These alloys lack certain desirable characteristics, such as the capability of being fabricated into a bushing, have undesirable electrical characteristics, or are too costly.
The length of the life of the bushing 10 when a given alloy is used is influenced by the size of the bottom wall 56, the thickness of it, and the temperature of operation. With the larger number of the tips 58 employed in the making of the finer filaments 18, the area of the bottom wall S6 is larger and the life is correspondingly reduced. While the bottom wall 56 could be made thicker to increase the life and reduce creep or sag, the 7095~
;: :
inc~eased thickness has a deleterious effect upon the temperature pattern of the bushing as influenced by the pattern of the current flowing from one of the terminals 62 to the other. The increased thickness also has an effect upon the fiber-forming operation due to a change in the physical size of the passages 60 and also tends to a~d considerably to the cost of the bushing ;~
due to the increased amount of the metal employed therein. The operating temperature has a very substantial influence on the life of the bushing with higher temperatures substantially reducing ;
life. For example, a bushing operated at a temperature of 2200F.
to produce a given type fiber heretofore had an expected life in the order of nine months beore excess sagging occurred. A
similar bushing operated at a temperature of 2500F. to produce special high-temperature fibers for special purposes had an expected life in the order of only six hours before excess sagging occurred.
In the embodiment of the invention disclosed the bushing tip section or bottom wall 56 is supported, preferably internally, at spaced points to greatly reduce sag and to substantially extend the life of the bushing. The bushing is supported in a manner such that the support does not interfere with the heat pattern of the bushing nor does it interfere with the fiber-forming operation in any manner. Accordingly, a plurality of elongate, high temperature-resistant, metal members, ;~ ;
preferably hollow and in the form of tubes 64, extend between the upright walls 48-54 and specifically between the side walls 4 and 50, as shown. Connecting means extend between the elongate members 64 and the bottom wall 56J being shown in the form of gussets or plates 66 which are affixed to both the lower surface of the elongate members 64 and the upper surface of the bottom ., i ~;.
.", .:, ~ [37~95C9 wall 56. The plates F,6 can be affixed, as by welding, either continuously or in intermittent lengths to the tubes 64, as indicated at 68. The plates 66 preferably are welded to the bottom wall 56 only in intermittent, short lengths, indicated at 70. Solely by way of further illustration, the tubes 64 can be in the order of 9/32 inch in diameter with a wall thick-ness of 0.030 inch while the plates 66 are about 1/2 inch or so high, 0.020 inch thick, and are long enough to extend sub-stantially between the upright walls 48 and 50.
As shown in Figure 3, each of the elongate members 64 is open at both of the walls 48 and 50 to provide a passage 72 which receives an elongate refractory member or rod 74 which can be of ceramic material such as alumina. The rods 74 can be 7/32 inch in diameter and 1/4 inch or so longer than the tubes 64. The length of the rod exceeds the distance between the upright walls 48 and 50 so that the rod 74 extends into both of the castable bodies 36 and 38 for support, the castable material being poured while the rods are held in place. The diameter of the passage 72 preferably exceeds the diameter of the rod 74 but with the upper surface of the rod 74 bearing against the upper inner surface of the passage 72, whereby the rod fully supports the hollow member without having to be closely fit to the diameter of the passage 72 and substantially prevents any tendency for the member 64 to sag. The member 64 provides support for the plate 66 which, in turn, provides transverse support for the bottom wall 56, greatly reducing sag and increasing dimensional s-tability.
As shown in Figure 4, preferably a plurality of the transverse supports are supplied for the l~wer or bottom wall 56, with the supports typically being spaced apart about two .
'' 37~5 ' inches along the longitudinal extent of the bushing. The spacing of the supports, of course, deuends on many factors, including the length and width of the bushing, the opera-ting temperatures, and the physical nature of the bottom wall 56.
Various modifications of the above-described embodi-ment of the invention will be apparent to those skilled in the art, and it is to be understood that such modifications can be made without departing from the scope of the invention, if they are within the s~irit and the tenor of the accompanying claims.
?
_ g ~ ~
~' : ' . '" ' ' : . . . : .
This ~nyent~on relates to ~upport~ ~or conta~ners for heat-so~tena~le ~ater~al and more ~peci~ically to internal supports ~or bus~ings ~rom ~hich ~lass ;e~bers are at~enuated.
There has been a trend in recent years toward making textile glass ~ilaments or ~ibers o~ smaller diameter, which smaller ~laments have a nu~er o~ advantages well recognized in the art. As the ~iber diameter decreases, it i5 advantageous to attenuate more filaments from each bushing to maintain glass through-put of the bushing at reasonable rates. This has re-sulted in larger bushings with correspondingly larger tipsections or bottom walls to accommodate the larger number of tips from which the filaments are attenuated. The larger bottom walls are subjected to a greater o~erall load and tend to sag or creep sooner than bottom walls of smaller areas.
Also in recent years, there has been a need for filaments made of more highly refractory material so that such filaments can be used in environments at more highly elevated temperatures. Such filaments must be attenuated at higher temperatures with the heat-so~tenable material from which they 20 are made correspondingly being softened or melted in the ~ ;
bushing at higher temperatures. Such temperatures have a marked tendency to cause the bushing bottom wall to sag or creep at even greater rates, depending upon the temperatures involved. This is true even through the bushing is made of the most h;gh temperature resistant metal alloys known from which ~ushings can be fabricated.
Attempts have been made heretofore to overcome this problem o~ creep or sag through special bushing designs or through supports under the bushin~ ~ottoms. However, such ~ 1 -, 1C~7~ 5(~
attempts have met with limited success, often being ineffective to extencl the bushing life appreciably without excessive creep or sag resulting. 5uch supports also have tended to interfere with the heat pattern o the bushing bottom or have physically interfered with the attenuation of fibers, resulting in a tendency to disrupt the fiber-forming operation. Still other a-ttempts to reduce sag have required an excessive amount of the extremely expensive alloys of which the bushings are made.
It is, therefore, a principal object of the invention to obviate or omitigate the above disadvantages.
1~71195~
According to -the present invention a bushing comprises a wall structure having upper and lower sections said wall struc-ture being shaped and dim~nsioned to permit the flow therethrough of molten mineral material for attenuation into fibers; supporting means adapted for connection to said lower section, said supporting means comprising a member extending generalLy between an area defined by said wall s-tructure above said lower section thereof and means connecting said member to said lower section.
In the preferred embodiments, the present invention provides an improved bushing support which is highly effective in preventing or greatly reducing sag or creep in a bushing bottom wall. The support also does not interfere with the heat pattern of the bushing or otherwise interfere with the fiber-forming operation. The bushing support includes an elogate, internal member, preferably hollow, which extends between upright walls of the bushing, above the bottom wall thereof.
Connecting members or plates are affixed to the elongate members and to the bushing bottom wall below these members. The elongate members preferably extend between opposite upright side walls transversely to the bushing bottom with the connecting members being affixed to the bushing bottom wall between the rows of bushing tips which extend downwardly therefrom. In a preferred form, rods of highly-refractory ceramic material extend through the hollow, elongate members and beyond the bushing up-right walls to provide additional support.
~7~315~
EmbodimentS of the invention will now be described by way of example only with reference to the accompanying drawings in which: -Figure 1 is a somewhat schematic v:i.ew in elevation,with parts broken away and with parts in section, of overall apparatus for processing glass or other heat~softenable material into fine, continuous filaments;
Figure 2 is a somewhat enlarged, schematic view in transverse cross sect.ion taken along the line 2-2 of Figure l;
Figure 3 is a fragmentary view in cross section taken along the line 3-3 of Figure 2; and Figure 4 is a somewhat schematic side view in elevation of the bushing shown in Figures 1-3.
~07(~S(~
While the invention has particular utility in heat conditioning and processing heat-softenable glass for attenuation into fine, textile filaments, the invention also may be utilized for heat conditioning and processing other mineral materials at ~;
elevated temperatures in a container which is subjected to creep or sag.
Referring particularly to Figure 1, a container and specifically a bushing 10 is arranged to be supplied with and contain heat-softenable material, such as glass, and especially glass suitable for attenuation into fine, continucus filaments suitable for textile uses.
The bushing 10 is located below and in communication ~ ~.
with a forehearth 12 which receives refined, heat-softened or ~:
molten glass from a mel~ing furnace 14. The bushing 10 may also ~ ~
be associated with other glass heating arrangements, including :
spheres or pieces of pre-refined glass melted in a region abov~
the bushing at a rate at which the glass is withdrawn or attenuated from the bushing in a plurality of streams. Streams 16 of glass are attenuated into filaments 18 and are collected into a s-trand 20 by means of a gathering shoe 22 after a suitable binder or the like is applied to the individual filaments 18 by an applicator 24. The strand 20 is then wound upon a tube or sleeve 26 mounted on a mandrel 28 and driven by suitable drive means in a winding machine housing 30. The strand 20 is traversed lengthwise of the tube 26 by a level wind device 32, as is known in the art.
The bushing 10 is mounted in communication with an ~ :
opening 34 in the bottom of the forehearth 12. More specifically, the bushing 10 is mounted in castable refractory bodies 36 and 38 which are supported by frames 40 and 42 suitably affixed to the :;
~o7C)~5(~
forehearth supporting structure. In this instance, the bushing 10 has horizontally-extending flanges 44 and 46 which are located between the castable bodies 36 and 38 and the refractory of the forehearth 12 forrning -the opening 34. Upright side walls 48 and 50 and upright end walls 52 and 54 extend downwardly from the horizontal flanges and terminate at their lower edges in a bottom wall or tip section 56. A multiplicity of fiber-forming tips 58 extend downwardly from the tip section 56 and have suitable orifices or passages 60 (Figure 3) formed therein through which heat-softened material is attenuated into the filaments 18.
The bushing 10 is heated by current supplied to the walls of the bushing through terminals 62 (Figure 4) located at the ends thereof, as is known in the art.
When the bushing is in operation for a period of time, the bottom wall or tip section 56 tends to creep or ~ag particu-larly in the center, even when made of the highest temperature resistant alloys of platinum and rhodium known in the art. Other alloys exist which are capable of withstanding higher temperatures~
for longer periods of time but such alloys are otherwise unsuitable for use in bushings, such as the bushing 10. These alloys lack certain desirable characteristics, such as the capability of being fabricated into a bushing, have undesirable electrical characteristics, or are too costly.
The length of the life of the bushing 10 when a given alloy is used is influenced by the size of the bottom wall 56, the thickness of it, and the temperature of operation. With the larger number of the tips 58 employed in the making of the finer filaments 18, the area of the bottom wall S6 is larger and the life is correspondingly reduced. While the bottom wall 56 could be made thicker to increase the life and reduce creep or sag, the 7095~
;: :
inc~eased thickness has a deleterious effect upon the temperature pattern of the bushing as influenced by the pattern of the current flowing from one of the terminals 62 to the other. The increased thickness also has an effect upon the fiber-forming operation due to a change in the physical size of the passages 60 and also tends to a~d considerably to the cost of the bushing ;~
due to the increased amount of the metal employed therein. The operating temperature has a very substantial influence on the life of the bushing with higher temperatures substantially reducing ;
life. For example, a bushing operated at a temperature of 2200F.
to produce a given type fiber heretofore had an expected life in the order of nine months beore excess sagging occurred. A
similar bushing operated at a temperature of 2500F. to produce special high-temperature fibers for special purposes had an expected life in the order of only six hours before excess sagging occurred.
In the embodiment of the invention disclosed the bushing tip section or bottom wall 56 is supported, preferably internally, at spaced points to greatly reduce sag and to substantially extend the life of the bushing. The bushing is supported in a manner such that the support does not interfere with the heat pattern of the bushing nor does it interfere with the fiber-forming operation in any manner. Accordingly, a plurality of elongate, high temperature-resistant, metal members, ;~ ;
preferably hollow and in the form of tubes 64, extend between the upright walls 48-54 and specifically between the side walls 4 and 50, as shown. Connecting means extend between the elongate members 64 and the bottom wall 56J being shown in the form of gussets or plates 66 which are affixed to both the lower surface of the elongate members 64 and the upper surface of the bottom ., i ~;.
.", .:, ~ [37~95C9 wall 56. The plates F,6 can be affixed, as by welding, either continuously or in intermittent lengths to the tubes 64, as indicated at 68. The plates 66 preferably are welded to the bottom wall 56 only in intermittent, short lengths, indicated at 70. Solely by way of further illustration, the tubes 64 can be in the order of 9/32 inch in diameter with a wall thick-ness of 0.030 inch while the plates 66 are about 1/2 inch or so high, 0.020 inch thick, and are long enough to extend sub-stantially between the upright walls 48 and 50.
As shown in Figure 3, each of the elongate members 64 is open at both of the walls 48 and 50 to provide a passage 72 which receives an elongate refractory member or rod 74 which can be of ceramic material such as alumina. The rods 74 can be 7/32 inch in diameter and 1/4 inch or so longer than the tubes 64. The length of the rod exceeds the distance between the upright walls 48 and 50 so that the rod 74 extends into both of the castable bodies 36 and 38 for support, the castable material being poured while the rods are held in place. The diameter of the passage 72 preferably exceeds the diameter of the rod 74 but with the upper surface of the rod 74 bearing against the upper inner surface of the passage 72, whereby the rod fully supports the hollow member without having to be closely fit to the diameter of the passage 72 and substantially prevents any tendency for the member 64 to sag. The member 64 provides support for the plate 66 which, in turn, provides transverse support for the bottom wall 56, greatly reducing sag and increasing dimensional s-tability.
As shown in Figure 4, preferably a plurality of the transverse supports are supplied for the l~wer or bottom wall 56, with the supports typically being spaced apart about two .
'' 37~5 ' inches along the longitudinal extent of the bushing. The spacing of the supports, of course, deuends on many factors, including the length and width of the bushing, the opera-ting temperatures, and the physical nature of the bottom wall 56.
Various modifications of the above-described embodi-ment of the invention will be apparent to those skilled in the art, and it is to be understood that such modifications can be made without departing from the scope of the invention, if they are within the s~irit and the tenor of the accompanying claims.
?
_ g ~ ~
~' : ' . '" ' ' : . . . : .
Claims (21)
1. A bushing comprising a wall structure having upper and lower sections said wall structure being shaped and dimensioned to permit the flow therethrough of molten mineral material for attenuation into fibres; supporting means adapted for connection to said lower section, said supporting means comprising a member extending generally between an area defined by said wall structure above said lower section thereof, and means connecting said member to said lower section.
2. A bushing for containing molten mineral from which fibres can be attenuated, said bushing comprising a wall structure having a generally upwardly extending wall section and a lower wall section disposed therebeneath, said lower wall section having a plurality of orifices formed therein, supporting means adapted for connection to said lower wall section, said supporting means comprising a member extending generally between an area defined by said upwardly extending wall section and above said lower wall section and means connecting said member to said lower wall section.
3. A bushing for containing molten mineral material from which fibers can be attenuated, said bushing comprising upright walls and a bottom wall extending between said upright walls, said bottom wall having a plurality of orifices through which molten mineral material can flow for attenuation into fibers and supporting means connected to said bottom wall to provide support for said bottom wall in order to increase the dimensional stability thereof and reduce creep or sag over a period of time, said supporting means comprising an elongate member extending between two upright walls above said bottom wall, and means con-necting said elongate member to said bottom wall.
4. A bushing according to claim 2 wherein said supporting means comprises tubular metal members extending through the interior of the bushing.
5. A bushing according to claim 4 wherein a ceramic rod extends through each of said tubular members and beyond the corresponding upright walls.
6. A bushing for containing molten mineral material and for heat softening the material until fibers can be attenuated therefron, said bushing comprising generally upwardly extending walls and a bottom wall connecting said upright walls, said bottom wall having a plurality of orifices shaped and dimensioned to permit the flow of molten mineral material there-through for attenuation into fibers; means for supplying current through said walls to heat the same, said upwardly extending and bottom walls being structured of a high-temperature resistant metal; supporting means connected in spaced relationship to said bottom wall by connecting means, said supporting means comprising a plurality of members positioned transversely of said bottom wall and spaced therealong.
7. A bushing as claimed in claim 6 wherein said connecting means are affixed to said members and to spaced transversely extending portions of said bottom wall.
8. A bushing as defined in claim 6 wherein said members are elongate.
9. A bushing as defined in claim 6 or 8 wherein said members are hollow.
10. A bushing as defined in claim 8 wherein said members are hollow and a rod extends therethrough.
11. A bushing as defined in claim 10 wherein said rod extends beyond both ends of each of said elongate hollow members.
12. A bushing as defined in claim 11 wherein castable refractory material embeds both ends of said rod beyond each of said elongate hollow members.
13. A bushing as defined in claim 12 wherein said rods are made of a ceramic material.
14. A bushing as defined in claim 6, 7 or 8 wherein said supporting means includes castable refractory material em-bedding the ends of said members.
15. A bushing for containing heat-softenable glass from which fibers can be attenuated, said bushing comprising upright walls and a bottom wall extending between said upright walls, said bottom wall having a plurality of orifices through which glass can flow for attenuation into fibers, means for heating said bushing, and supporting means connected to said bottom wall to provide support for said bottom wall in order to increase the dimensional stability thereof and reduce creep or sag over a period of time, said supporting means comprising an elongate, tubular member located in spaced supporting relationship with respect to said bottom wall, connecting means affixed to said tubular member and said bottom wall, and refractory means located in said tubular member and effective to aid in supporting same.
16. A bushing as defined in claim 15 wherein said refractory means extends substantially the full length of said tubular member.
17. A bushing as defined in claim 15 wherein said refractory means is a refractory rod.
18. A bushing as defined in claim 17 wherein said refractory rod comprises alumina.
19. A bushing as defined in claim 17 wherein said refractory rod extends beyond both ends of said tubular member.
20. A bushing as defined by claim 19 wherein means are provided for supporting both ends of said refractory rod.
21. A bushing for containing molten mineral material and for heat softening the material until fibers can be attenuated therefrom, said bushing comprising upright walls and a bottom wall connecting said upright walls, said bottom wall having a plurality of orifices through which molten mineral material can flow for attenuation into fibers, means for supplying current through said walls to heat the same, said upright and bottom walls being made of a high-temperature resistant metal, internal supporting means connected to said bottom wall at spaced longi-tudinal portions thereof to provide support for said bottom wall in order to increase the dimensional stability thereof and reduce creep or sag over a period of time, said supporting means comprising a plurality of elongate members positioned transversely of said bottom wall and spaced therealong, and connecting means affixed to said elongate members and to spaced transversely-extending portions of said bottom wall.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US514524A US3920430A (en) | 1973-10-09 | 1974-10-15 | Support for bushing for containing molten mineral material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1070950A true CA1070950A (en) | 1980-02-05 |
Family
ID=24047562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA235,931A Expired CA1070950A (en) | 1974-10-15 | 1975-09-19 | Support for bushing for containing heat-softenable material |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5945614B2 (en) |
| BE (1) | BE834496A (en) |
| CA (1) | CA1070950A (en) |
| DE (1) | DE2545525C2 (en) |
| FR (1) | FR2288067A1 (en) |
| IT (1) | IT1043339B (en) |
| LU (1) | LU73577A1 (en) |
| NL (1) | NL177912C (en) |
| SE (1) | SE412899B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS536626A (en) * | 1976-07-07 | 1978-01-21 | Nitto Boseki Co Ltd | Bushings for spinning glass fibers |
| US6779366B2 (en) | 2001-11-09 | 2004-08-24 | Owens Corning Fiberglas Technology, Inc. | Bushing assembly/support structure arrangement |
| FR2850964B1 (en) * | 2003-02-12 | 2006-06-02 | Saint Gobain Vetrotex | REINFORCING DEVICE FOR A CHAIN DELIVERING FILAMENTS IN PARTICULAR GLASS |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL131324C (en) * | 1964-03-13 |
-
1975
- 1975-09-19 CA CA235,931A patent/CA1070950A/en not_active Expired
- 1975-10-09 NL NL7511847A patent/NL177912C/en not_active IP Right Cessation
- 1975-10-10 DE DE19752545525 patent/DE2545525C2/en not_active Expired
- 1975-10-14 BE BE160925A patent/BE834496A/en unknown
- 1975-10-14 LU LU73577A patent/LU73577A1/xx unknown
- 1975-10-14 FR FR7531404A patent/FR2288067A1/en active Granted
- 1975-10-14 IT IT2824775A patent/IT1043339B/en active
- 1975-10-14 SE SE7511462A patent/SE412899B/en not_active IP Right Cessation
- 1975-10-15 JP JP12422975A patent/JPS5945614B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1043339B (en) | 1980-02-20 |
| SE7511462L (en) | 1976-04-20 |
| FR2288067B1 (en) | 1980-01-11 |
| DE2545525C2 (en) | 1984-07-19 |
| JPS5945614B2 (en) | 1984-11-07 |
| NL7511847A (en) | 1976-04-21 |
| JPS5164024A (en) | 1976-06-03 |
| DE2545525A1 (en) | 1976-04-29 |
| NL177912B (en) | 1985-07-16 |
| SE412899B (en) | 1980-03-24 |
| BE834496A (en) | 1976-02-02 |
| LU73577A1 (en) | 1976-06-11 |
| FR2288067A1 (en) | 1976-05-14 |
| NL177912C (en) | 1985-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |