CN102531376A - Method and welding furnace for producing glass base metal - Google Patents
Method and welding furnace for producing glass base metal Download PDFInfo
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- CN102531376A CN102531376A CN2011102769768A CN201110276976A CN102531376A CN 102531376 A CN102531376 A CN 102531376A CN 2011102769768 A CN2011102769768 A CN 2011102769768A CN 201110276976 A CN201110276976 A CN 201110276976A CN 102531376 A CN102531376 A CN 102531376A
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- stacked body
- glass granules
- glass
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/14—Other methods of shaping glass by gas- or vapour- phase reaction processes
- C03B19/1484—Means for supporting, rotating or translating the article being formed
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Abstract
The invention provides a method and welding furnace for producing glass base metal, which is capable of eliminating the non-sintering portion and preventing overheating of the base stick, thereby avoiding stretching. According to the sintering furnace for making glass base metal, a heat shield clamping tool of the lower clamping tool capable of adjusting position is directly fixed to the initial base stick. The lower clamping tool is configured to the neighborhood of the tapered portion at the upper portion of the glass particle laminating body. Therefore, the heat shield can be carried out in a manner of preventing the heat energy generated by the heater from being conducted to the initial base stick, thereby reliably preventing the stretching of the initial base stick. Moreover, the upper portion of the glass particle laminating body can be made to be close to the heater, thereby reducing the non-sintering area at the upper end of the glass particle laminating body. Also, as the position of the lower clamping tool can be adjusted in the length direction of the glass particle laminating body, it does not have to contact with the glass particle laminated body and can carry out the position adjustment of the heat shield board corresponding to each glass particle laminated body.
Description
Technical field
The present invention relates to a kind of with the method for manufacture of glass granules stacked body agglomerating base glass material in process furnace and the sintering oven of making base glass material.
Background technology
Put down in writing the application's agglomerating plant 100 shown in Figure 8 in the TOHKEMY 2000-219519 communique.Agglomerating plant 100 has: stove core barrel 106, and it has and covers 109; And process furnace 105, its be configured in stove core barrel 106 around, have well heater 104.In agglomerating plant 100, will on initial rod 112, pile up glass granules and the porous glass base material that forms 111 inserts in the stove core barrels 106, porous glass base material 111 is descended in rotation, utilize process furnace 105 to carry out sintering.Agglomerating plant 100 has the rare gas element ingress pipe 102 that is used to supply with He gas etc. in the lower end of stove core barrel 106, above stove core barrel 106, have gas barrier 108.
In agglomerating plant 100, top heat shield piece 107 is set above porous glass base material 111, accomplish position 116 at the sintering of porous glass base material 111 and promptly bottom heat shield piece 103 is set.The top heat shield piece placed on the cone 113 of porous glass base material 111 tops in 107 years, and bottom heat shield piece 103 is fixed on the stove core barrel 106.Top heat shield piece 107 and bottom heat shield piece 103 are made up of silica glass, through being arranged on the upper and lower of porous glass base material 111, thereby suppress the photothermal diffusion from cone 113, suppress the temperature inequality and the natural convection of stove core barrel 106.
Porous glass base material 111 is being carried out in the agglomerating operation; Sometimes do not conduct or taken place not sintering of top that diffusion causes porous glass base material 111 well owing to heat; Perhaps on the contrary, owing to causing initial rod 112, superheated is stretched sometimes.If the upper end of porous glass base material 111 is sintering not, then owing to its with sintering portion between different the cracking of contraction, porous glass base material 111 is dropped.In addition, might in the wire-drawing process of subsequent handling, make not that sintering partly is sintered, porous glass base material 111 is crooked in fiber drawing furnace.In addition, also maybe since not the carbon black of sintering portion drop and adhere to sintering portion, so when wire drawing, break.In addition, also there is following problems, that is, and when flame polish, at the boundary of sintering portion and sintering portion not, owing to the difference of coefficient of thermal expansion causes the base glass material fracture and drops.
In addition,, then initial rod 112 is exceedingly heated, initial rod 112 is stretched if make the top superheated of porous glass base material 111.If initial rod 112 is stretched, problem such as then produce the crooked of porous glass base material 111 or drop.In addition, porous glass base material 111 has the tendency of maximization, and it is heavy that weight becomes, and becomes the stretching of initial rod 112 takes place easily.
In agglomerating plant 100 during with porous glass base material 111 sintering, before inserting porous glass base material 111 in the stove core barrels 106, must be to major general top heat shield piece 107 penetrate from the top of porous glass base material 111, and year put on cone 113.When this installation exercise, owing to heat shield piece 107 contacts with the soot body, so maybe porous glass base material 111 be scratched.In addition; In agglomerating plant 100; By the be provided with stationkeeping of porous glass base material 111 with heat shield piece 107; Can't carry out heat shield piece 103,107 with respect to the adjustment of the position of heating region to each mother metal, therefore, be difficult to solve fully the such problem of not sintering of upper end of stretching and the porous glass base material 111 of the initial rod 112 when preventing sintering.
Summary of the invention
The objective of the invention is to, a kind of method of manufacture of base glass material and the sintering oven of making base glass material are provided, it can eliminate not sintering portion, and prevents the superheated to female rod, thereby avoids stretching.
In order to realize purpose, the present invention provides a kind of sintering oven of base glass material, it is characterized in that, comprises: (1) stove core barrel, and its glass granules stacked body that forms on initial female rod, piling up glass granules is accommodated; (2) link parts, it is hung the glass granules stacked body in the stove core barrel; (3) process furnace, its at least a portion with the stove core barrel is surrounded, and the glass granules stacked body is carried out heat-agglomerating; And (4) thermoshield anchor clamps, it is configured near the top of taper stack portion on the glass granules stacked body top in the stove core barrel, and the thermoshield anchor clamps can carry out the position adjustment with respect to the glass granules stacked body on the length direction of glass granules stacked body.
Preferred thermoshield clamps is on stove core barrel, binding parts or initial female rod.In addition; In embodiment; The thermoshield anchor clamps comprise upper clamp, heat shield plate and with upper clamp and heat shield plate banded hanging bolt, upper clamp is fixed on and links on parts or the initial female rod, and the interval of upper clamp and heat shield plate can be adjusted.
As other embodiments of the present invention; A kind of method of manufacture of base glass material is provided, in the method, is used to heat from heating region; The glass granules stacked body that forms on initial female rod, piling up glass granules carries out heat-agglomerating; It is characterized in that near the top of the taper stack portion on glass granules stacked body top, the thermoshield anchor clamps of position adjustment can be on the length direction of glass granules stacked body be carried out in configuration with respect to the glass granules stacked body; To from heating region and base glass material in the heat shielding of initial female rod conduction, carry out sintering to the glass granules stacked body.
The effect of invention
According to the method for manufacture of base glass material involved in the present invention and the sintering oven of making base glass material; Be configured near the top of taper stack portion on glass granules stacked body top owing to can carry out the thermoshield anchor clamps of position adjustment, therefore can the thermoshield anchor clamps be adjusted to the optimum position between taper stack portion and the female excellent portion.Therefore; Even female excellent portion is to greatest extent near heating region; Also can utilize the thermoshield anchor clamps can prevent the stretching of female excellent portion reliably reliably, and can reduce the zone of not sintering portion of the upper end of glass granules stacked body to the heat shielding of the excellent portion of mother side conduction.In addition; Because therefore the thermoshield anchor clamps can, needn't contact with the glass granules stacked body in the enterprising line position adjustment of the length direction of glass granules stacked body; Can carry out the position adjustment of thermoshield anchor clamps to each glass granules stacked body, and can prevent the glass granules stacked body is damaged.
Description of drawings
Fig. 1 is the concept map of the 1st embodiment of expression sintering oven involved in the present invention.
Fig. 2 is the enlarged view of the thermoshield anchor clamps periphery in the sintering oven of the 1st embodiment.
The chimeric preceding state of the lower clamp in the thermoshield anchor clamps of Fig. 3 presentation graphs 2 (a) is vertical view, (b) is side-view.
State after lower clamp in the thermoshield anchor clamps of Fig. 4 presentation graphs 2 chimeric (a) is vertical view, (b) is side-view.
The variation of the lower clamp in the thermoshield anchor clamps of Fig. 5 presentation graphs 2 (a) is vertical view before chimeric, (b) is the vertical view after chimeric.
Upper clamp in the thermoshield anchor clamps of Fig. 6 presentation graphs 2 (a) is vertical view, (b) is side-view.
Fig. 7 is the enlarged view of the thermoshield anchor clamps periphery in the 2nd embodiment of sintering oven involved in the present invention.
Fig. 8 is the concept map of the existing sintering oven of expression.
Embodiment
Below, with reference to accompanying drawing, embodiment of the present invention is described.Accompanying drawing does not limit scope of invention for the purpose of description.In the accompanying drawings, for fear of the repetition of explanation, identical label is represented same part.Dimension scale in the accompanying drawing is not necessarily accurate.
The 1st embodiment
Fig. 1 is the concept map of the 1st embodiment of expression sintering oven involved in the present invention.Sintering oven 10 as the 1st embodiment of the present invention has: stove core barrel 11, its top are by lid 13 obturations, and the glass granules stacked body 1 that forms on initial female rod 3, piling up glass granules is accommodated; And as the well heater 12 of thermal source, its outer circumferential side at stove core barrel 11 carries out heat-agglomerating to glass granules stacked body 1.
Glass granules stacked body 1 has columned stable stack portion 4, is positioned at taper stack portion 2,5 and the top part of superposed taper stack portion 2 and the female excellent portion 8 of not piling up glass granules of the upper and lower end parts of stablizing stack portion 4, and this glass granules stacked body 1 utilizes and links parts 14 and hang in stove core barrel 11.Have the gas supply part 15 of supplying with rare gas elementes such as He gas in the bottom of stove core barrel 11, have gas discharge section 16 on the top of stove core barrel 11.
Fig. 2 is the enlarged view of thermoshield anchor clamps 20 peripheries in the sintering oven 10.Sintering oven 10 is near the taper stack portion 2 on glass granules stacked body 1 top, and having can be at the thermoshield anchor clamps 20 of the carbon system of the enterprising line position of the length direction of this glass granules stacked body 1 adjustment.Thermoshield anchor clamps 20 by the upper clamp 21 on the prescribed position that is fixed on initial female rod 3, have 22,3 hanging bolts 23 of discoideus lower clamp of thermoshield function and the adjustment nut 26A that screws togather with each hanging bolt 23,26B and constitute.Pars intermedia at initial female rod 3 of fixing upper clamp 21 has the female excellent stage portion 7 with upper clamp 21 engagings.
If the internal diameter of stove core barrel 11 is made as D0, then the D outer diameter 1 with thermoshield anchor clamps 20 is set at the outside dimension in the scope that drops on 0.3D0＜D1＜0.98D0.For example, if inside diameter D 0 is 210mm, then roughly D outer diameter 1 is set in the scope of 63mm～206mm.If the upper end of the initial female rod 3 of the position H0 of lower clamp 22 distance is 300mm for example, then the height H 1 with thermoshield anchor clamps 20 is set at about about 200mm.
Fig. 3 representes the chimeric preceding state of the lower clamp 22 in the thermoshield anchor clamps 20, (a) is vertical view, (b) is side-view.Lower clamp 22 constitutes by the 1st heat shield plate 24 with notch 27 and with the 1st heat shield plate 24 the 2nd chimeric heat shield plates 25.The 1st heat shield plate 24 centre portion therein has the female excellent through hole 28 that female excellent portion 8 is run through, and the 1st heat shield plate 24 has notch of using when in the excellent portion 8 of mother, installing 27 and 3 bolt-through holes 29 that make hanging bolt 23 insertions.Notch 27 is to be used for when in the excellent portion 8 of mother, installing, and through the 2nd heat shield plate 25 is pulled down, thereby from notch 27 the excellent portion 8 of mother is disposed at the part in female excellent through hole 28, the 1st stage portion 24A that has chimeric usefulness at two ora terminalis.
The 2nd heat shield plate 25 forms through and for example fan shape that notch 27 covered chimeric from the top of the notch 27 of the 1st heat shield plate 24.The notch geometry of notch 27 is not limited to fan shape, and for example notch 27 also can be a rectangle (Fig. 5 (a) and (b)) roughly.The 2nd heat shield plate 25 forms wideer than notch 27, places on the both ends of the notch 27 on the 1st heat shield plate 24 to carry, and has the 2nd stage portion 25A at two ora terminalis.The 1st stage portion 24A through making the 2nd stage portion 25A and the 1st heat shield plate 24 is chimeric, thereby the 2nd heat shield plate 25 is fixed on the 1st heat shield plate 24.
In addition, through forming recess 24B in the part of the 1st stage portion 24A, the 2nd stage portion 25A form protuberance 25B with the corresponding position of recess 24B, thereby can be when chimeric with the 2nd stage portion 25A fixing and can not make its landing with the 2nd heat shield plate 25.Recess 24B, protuberance 25B can be positioned at the end (Fig. 3 (a)) of notch 27, also can be positioned near the central part (Fig. 5 (a) and (b)) of notch 27.If be positioned near the central part, then on fore-and-aft direction, also can be fixed, therefore can fix more firmly.At notch 27 is under the situation of fan shape; The otch angle θ 1 of the notch 27 of the 1st heat shield plate 24 for example is about 130 °, and the center angle θ 2 of the 2nd heat shield plate 25 is set in for example 135 °～140 ° the scope than otch angle θ 1 big (02＞θ 1).
Fig. 4 representes the state after lower clamp 22 chimeric in the thermoshield anchor clamps 20, (a) is vertical view, (b) is side-view.Making under the chimeric state to the 1st heat shield plate 24 of the 2nd heat shield plate 25, form circular female excellent through hole 28, notch 27 is covered fully.The D outer diameter 2 of lower clamp 22 equates with the D outer diameter 1 of thermoshield anchor clamps 20, will be set in the scope of 1.25＜D2/D3＜5 preferred 3≤D2/D3≤4 with the ratio D2/D3 of the inside diameter D 3 of the excellent through hole 28 of mother.For example, if D outer diameter 2 is 200mm, then the inside diameter D 3 with the excellent through hole 28 of mother is set in the scope of about 50mm～66mm.
Fig. 6 representes the upper clamp 21 in the thermoshield anchor clamps 20, (a) is vertical view, (b) is side-view.Upper clamp 21 has: 3 link piece 31, and it is to 3 directions extensions and near each leading section, have bolt-through hole 33; And open hole 32, it is positioned at and is used for and initial female rod 3 direct fixed centers.Form thermodiffusion space (Fig. 6 (a)) in the both sides of each link piece 31, heat can not be trapped near female excellent portion 8, from the heat of well heater 12 to the diffusion of the top of stove core barrel 11.It is path and the downside open hole stage portion 34 (Fig. 6 (b)) for big footpath that open hole 32 has upside, through the female excellent stage portion 7 of open hole stage portion 34 with initial female rod 3 engage, thereby thermoshield anchor clamps 20 is fixed on initial mother's excellent 3 prescribed position.
Below, explain and use thermoshield anchor clamps 20 to carry out the agglomerating method of glass granules stacked body 1.
The assembling of thermoshield anchor clamps
At first, the lower side from the 1st heat shield plate 24 of lower clamp 22 penetrates 3 hanging bolts 23.Then, the 1st adjustment nut 26A and each hanging bolt 23 are screwed togather, hanging bolt 23 is penetrated in the bolt-through hole 33 of upper clamp 21.Then, the 2nd adjustment nut 26B and each hanging bolt 23 are screwed togather.The position that screws togather of adjustment nut 26A, 26B is confirmed as, and, the 1st heat shield plate 24 of lower end is configured near the top of taper stack portion 2 on glass granules stacked body 1 top when initial female excellent 3 engage at thermoshield anchor clamps 20.
The thermoshield anchor clamps are to the installation of glass granules stacked body
Below, the thermoshield anchor clamps 20 that assemble are lifted, under the state that the 2nd heat shield plate 25 is pulled down, the upper end 6 of the excellent portion 8 of mother is inserted the open hole 32 of upper clamp 21 from lower side.Because glass granules stacked body 1 is heavier; So when it is provided with on linking parts 14; Must keep female excellent portion 8 to be provided with on one side by static organ on one side; At this moment, the notch 27 that makes the 1st heat shield plate 24 is towards the excellent portion of mother 8 sides, and the mode that does not contact with glass granules stacked body 1 with the 1st heat shield plate 24 is to the excellent portion of mother 8 side shiftings.Thus, even keeping also can the excellent portion 8 of mother being disposed in the excellent through hole 28 of mother from the notch 27 of the 1st heat shield plate 24 under the state of glass granules stacked body 1 by static organ below the excellent portion 8 of mother.Then, thermoshield anchor clamps 20 are descended to glass granules stacked body 1 side, until upper clamp 21 with till initial female female excellent stage portion 7 of excellent 3 engages.
At this moment, so that the 1st heat shield plate 24 horizontal arrangement in the taper stack portion 2 on glass granules stacked body 1 top and the mode of the boundary member between female excellent portion 8, are carried out inching and location to 3 groups of adjustment nut 26A, 26B.At last, through the 2nd heat shield plate 25 is chimeric to the 1st heat shield plate 24, thus the installation of completion thermoshield anchor clamps 20.
The sintering circuit of glass granules stacked body
Glass granules stacked body that thermoshield anchor clamps 20 are installed 1 and binding parts 14 are linked, and hang in sintering oven 10.Then, through utilize well heater 12 with stove core barrel 11 internal heating to about 1600 ℃, thereby with glass granules stacked body 1 sintering and transparence.At this moment, the lower clamp 22 of thermoshield anchor clamps 20 is configured in the taper glass granules stack portion 2 on glass granules stacked body 1 top and the boundary member between female excellent portion 8.Thus, will from well heater 12 and by the base glass material of transparence etc. in the heat shielding of the excellent portion of mother 8 conduction, with glass granules stacked body 1 sintering.
Thus, the stretching of initial female rod 3 that can prevent reliably to cause by the heat of well heater 12, and can reduce the zone of the not sintering portion on glass granules stacked body 1 top.In addition; The lower clamp 22 of thermoshield anchor clamps 20 can utilize adjustment nut 26 in the enterprising line position adjustment of the length direction of glass granules stacked body 1; Therefore needn't contact with glass granules stacked body 1, can carry out the position adjustment of lower clamp 22 respectively to each glass granules stacked body 1.
As stated; According to the method for manufacture of the base glass material of this embodiment and the sintering oven of making base glass material; The thermoshield anchor clamps 20 that will have the lower clamp 22 that can carry out position adjustment directly are fixed in female excellent portion 8, lower clamp 22 are configured near the top of taper glass granules stack portion 2 on glass granules stacked body 1 top.Thus, can carry out thermoshield, conduct to the excellent portion 8 of mother, therefore, can prevent the stretching of female excellent portion 8 reliably can not make heat towards the upper side of lower clamp 22 from well heater 12.In addition, in the lower side of lower clamp 22, the top that can make taper stack portion 2 is near heating region, therefore, can reduce the zone of not sintering portion of the upper end of glass granules stacked body 1.
In addition, because therefore lower clamp 22 can, needn't contact with glass granules stacked body 1 in the enterprising line position adjustment of the length direction of glass granules stacked body 1, can carry out the position adjustment of heat shield plate to the position of the best to each glass granules stacked body 1.
The 2nd embodiment
Fig. 7 is the enlarged view of thermoshield anchor clamps 50 peripheries in the 2nd embodiment of sintering oven of manufacturing base glass material involved in the present invention.In addition, the assembling of thermoshield anchor clamps is identical with the 1st embodiment with sintering circuit, therefore omits explanation.
The installation of thermoshield anchor clamps
Be that as the sintering oven 40 of the 2nd embodiment of the present invention and the difference of the 1st embodiment thermoshield anchor clamps 50 are fixed on the binding parts 41 that connect initial female rod 3.Before in will linking parts 41 insertion stove core barrels 11, thermoshield anchor clamps 50 predetermined fixed are being linked on the parts 41.Upper clamp 51 constitutes, and is except open hole 52 is not have the straight hole this point of stage portion, identical with the 1st embodiment.Link parts 41 and have fastener 42 50 engagings of thermoshield anchor clamps.The open hole 52 of upper clamp 51 engages with fastener 42 from the top that links parts 41.
The installation of glass granules stacked body
For sintering oven 40,, glass granules stacked body 1 is hung in stove core barrel 11 in advance thermoshield anchor clamps 50 being fixed under the state that links on the parts 41.That is, the 2nd heat shield plate 25 of lower clamp 22 is pulled down, will be attached at the glass granules stacked body 1 of excellent 3 one of initial mother on the binding parts 41, and hang in stove core barrel 11.
At this moment, with the taper stack portion 2 on glass granules stacked body 1 top and the boundary member between female excellent portion 8, be configured near the notch 27 that is fastened on the 1st heat shield plate 24 in the stove core barrel 11 in advance.Utilize 3 groups of adjustment nut 26A, 26B to carry out the position adjustment, so that the 1st heat shield plate 24 does not contact and be configured in exactly the boundary portion office with glass granules stacked body 1.At last, the 2nd heat shield plate 25 is entrenched on the 1st heat shield plate 24, accomplishes the installation of the preceding glass granules stacked body 1 of sintering.(when glass granules stacked body 1 is pulled down,, therefore can under the state that thermoshield anchor clamps 50 are installed, glass granules stacked body 1 be pulled down from linking parts 41 owing to can the 2nd heat shield plate 25 be pulled down.)
The size of thermoshield anchor clamps 50 is confirmed by sintering oven 40 and glass granules stacked body 1.For example, if the upper end 300mm of the initial female rod 3 of the position H0 of lower clamp 22 distance, then the height H 1 of thermoshield anchor clamps 50 is about about 400mm.In addition size is identical with the 1st embodiment, therefore omits explanation.
As stated; According to the method for manufacture of the base glass material of the 2nd embodiment and the sintering oven of making base glass material; The thermoshield anchor clamps 50 that will have the lower clamp 22 that can carry out position adjustment are fixed on and link on the parts 41, lower clamp 22 are configured near the top of taper stack portion 2 on glass granules stacked body 1 top.Thus, can carry out thermoshield, conduct to the excellent portion 8 of mother, therefore can prevent the stretching of female excellent portion 8 reliably can not make heat towards the upper side of lower clamp 22 from well heater 12.In addition, in the lower side of lower clamp 22, the top that can make glass granules stacked body 1 is near heating region, therefore can reduce the zone of not sintering portion of the upper end of glass granules stacked body 1.In addition, therefore lower clamp 22 can, needn't contact with glass granules stacked body 1 in the enterprising line position adjustment of the length direction of glass granules stacked body 1, can be directed against each glass granules stacked body 1, carries out the position adjustment of lower clamp 22 to the position of the best.
In addition, the present invention is not limited by each above-mentioned embodiment, can suitably freely be out of shape, improvement etc.In addition, for the material of each integrant in the above-mentioned embodiment, shape, size, numerical value, mode, quantity, configuration position etc.,, then can be arbitrarily as long as can realize the present invention, do not limit.For example, in the above-described embodiment, be illustrated, but also be suitable for for the fiber drawing furnace in the wire-drawing process to sintering circuit.In addition, the installation site of thermoshield anchor clamps except initial female rod with the binding parts, also can be the stove core barrel or the lid of sintering oven.Because the thermoshield anchor clamps can not contact with glass granules stacked body itself, therefore can prevent reliably the glass granules stacked body is damaged.
Embodiment
In inside diameter D 0 is in the sintering oven of 210mm, to carry out the sintering that external diameter is the glass granules stacked body of 180mm (sintering temperature: 1600 ℃) in one month by a definite date.In an embodiment; In that being installed, the thermoshield anchor clamps (directly are fixed on the carbon system type thermoshield anchor clamps (the 1st embodiment of the present invention) on initial female rod; D outer diameter 1 is 200mm, and height H 1 is 220mm, and the position H0 of lower clamp is the upper end 320mm of the initial female rod of distance; The D outer diameter 2 of lower clamp is 200mm, inside diameter D 3:55mm) state under carry out sintering.In Comparative Examples, under the state that the thermoshield anchor clamps are not installed, carry out sintering.To embodiment and Comparative Examples, the frequency that unfavorable condition (mother metal drops, the mother metal upper end is eccentric, optical fiber broken string, mother metal crackle) takes place when sintering, wire drawing and the flame polish is added up to.In result shown in the table.
Table
It is as shown in the table, and in an embodiment, mother metal drops and the mother metal crackle does not take place fully.In addition, mother metal upper end off-centre and optical fiber broken string also can be suppressed lowlyer.Can infer that its reason is; In the lower side of the lower clamp of thermoshield anchor clamps, through lower clamp being adjusted to best position, thereby make the upper end of glass granules stacked body carry out sintering reliably; In addition; Owing to be directed against thermal conduction to the upper side of lower clamp, utilize the thermoshield anchor clamps to shield, therefore can suppress the stretching of female excellent portion.In addition, under the situation of the thermoshield anchor clamps that use the 2nd embodiment to put down in writing, also can obtain roughly identical result with it.
Relative therewith, in Comparative Examples, can know following situation, that is, taken place that mother metal drops and the mother metal crackle, the generation frequency of mother metal upper end off-centre and optical fiber broken string is compared with embodiment and is exceeded more than or equal to 10 times.Therefore, can confirm to obtain significant effect through the thermoshield anchor clamps are installed.
Claims (4)
1. the sintering oven of a base glass material is characterized in that, comprises:
The stove core barrel, its glass granules stacked body that forms on initial female rod, piling up glass granules is accommodated;
Link parts, it is hung said glass granules stacked body in said stove core barrel;
Process furnace, its at least a portion with said stove core barrel is surrounded, and said glass granules stacked body is carried out heat-agglomerating; And
The thermoshield anchor clamps, it is configured near the top of taper stack portion on the said glass granules stacked body top in the said stove core barrel,
Said thermoshield anchor clamps can carry out the position adjustment with respect to said glass granules stacked body on the length direction of said glass granules stacked body.
2. the sintering oven of base glass material according to claim 1 is characterized in that,
Said thermoshield clamps is on said stove core barrel, said binding parts or said initial female rod.
3. the sintering oven of base glass material according to claim 1 is characterized in that,
Said thermoshield anchor clamps comprise upper clamp, heat shield plate and with said upper clamp and said heat shield plate banded hanging bolt; Said upper clamp is fixed on said binding parts or the said initial female rod, and the interval of said upper clamp and said heat shield plate can be adjusted.
4. the method for manufacture of a base glass material in the method, is used to the heat from heating region, and the glass granules stacked body that forms on initial female rod, piling up glass granules carries out heat-agglomerating,
It is characterized in that,
Near the top of the taper stack portion on said glass granules stacked body top; Configuration can be carried out the thermoshield anchor clamps that the position is adjusted with respect to said glass granules stacked body on the length direction of said glass granules stacked body; To from said heating region and said base glass material in the heat shielding of said initial female rod conduction, carry out sintering to said glass granules stacked body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2010207967 | 2010-09-16 | ||
| JP2010-207967 | 2010-09-16 |
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| CN103350445A (en) * | 2013-07-20 | 2013-10-16 | 李涛 | Fixture and method for manufacturing ceramic fiber honeycomb blank |
| CN108129017A (en) * | 2018-01-25 | 2018-06-08 | 江苏通鼎光棒有限公司 | It is a kind of to improve OVD sintering efficiency and extend the device and method for drawing bar service life |
| CN113548795A (en) * | 2020-04-24 | 2021-10-26 | 株式会社藤仓 | Sintering device for porous glass body |
| CN114415287A (en) * | 2022-01-24 | 2022-04-29 | 武汉理工大学 | Hydrogen-resistant carbon-coated fiber grating string and preparation method and preparation device thereof |
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| WO2023248836A1 (en) * | 2022-06-22 | 2023-12-28 | 住友電気工業株式会社 | Manufacturing method of optical fiber preform, and optical fiber preform |
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| JPH07223833A (en) * | 1994-02-15 | 1995-08-22 | Fujikura Ltd | Production in optical fiber preform |
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| CN1108623A (en) * | 1993-06-08 | 1995-09-20 | 住友电气工业株式会社 | Apparatus for vitrifying soot preform for optical fiber |
| JP2000219519A (en) * | 1999-01-28 | 2000-08-08 | Shin Etsu Chem Co Ltd | Porous glass preform sintering device |
| CN1531511A (en) * | 2001-06-14 | 2004-09-22 | ס�ѵ�����ҵ��ʽ���� | Device and method for producing stack of fine glass particles |
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|---|---|---|---|---|
| CN103350445A (en) * | 2013-07-20 | 2013-10-16 | 李涛 | Fixture and method for manufacturing ceramic fiber honeycomb blank |
| CN103350445B (en) * | 2013-07-20 | 2016-04-27 | 李涛 | Ceramic fiber honeycomb stock prepare fixture and preparation method |
| CN108129017A (en) * | 2018-01-25 | 2018-06-08 | 江苏通鼎光棒有限公司 | It is a kind of to improve OVD sintering efficiency and extend the device and method for drawing bar service life |
| CN113548795A (en) * | 2020-04-24 | 2021-10-26 | 株式会社藤仓 | Sintering device for porous glass body |
| CN114415287A (en) * | 2022-01-24 | 2022-04-29 | 武汉理工大学 | Hydrogen-resistant carbon-coated fiber grating string and preparation method and preparation device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5821443B2 (en) | 2015-11-24 |
| JP2012082127A (en) | 2012-04-26 |
| CN102531376B (en) | 2015-11-25 |
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