WO2009056726A2 - Blocs de reception d'une matiere fondue, notamment du verre, et installation de fibrage pourvue de tels blocs - Google Patents
Blocs de reception d'une matiere fondue, notamment du verre, et installation de fibrage pourvue de tels blocs Download PDFInfo
- Publication number
- WO2009056726A2 WO2009056726A2 PCT/FR2008/051896 FR2008051896W WO2009056726A2 WO 2009056726 A2 WO2009056726 A2 WO 2009056726A2 FR 2008051896 W FR2008051896 W FR 2008051896W WO 2009056726 A2 WO2009056726 A2 WO 2009056726A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- block
- upstream
- inlet
- block according
- Prior art date
Links
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
- C03B7/08—Feeder spouts, e.g. gob feeders
- C03B7/09—Spout blocks
-
- 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
Definitions
- the invention relates to melt-receiving blocks, such as glass, and in particular to the glass-making block and to the intermediate block of a fiber-forming installation delivering filaments, especially glass filaments.
- a fiberizing installation comprises a so-called direct fusion, a glass block (flow block) which receives molten glass from a channel connected to the furnace in which the melting of the glass is obtained, an intermediate block ( bushing block) and a bushing, the intermediate block joining the glass plug block and the die.
- the die is provided in its upper part with a grid which distributes the flow of the glass from the intermediate block and feeding said die, and heat the glass Joule effect, and the bottom of a plate provided with a multitude of orifices from which the molten glass flows to be stretched into a multiplicity of filaments.
- These filaments whose diameter generally varies from 5 to 33 ⁇ m are gathered in at least one sheet which converges to an assembly device to form at least one wick and be for example wound.
- the wick can also be cut (cut son) or projected on a carpet (mats son continuous).
- the products obtained are used mainly in various reinforcement applications.
- a plurality of fiberizing installations are arranged next to each other. Upstream, the molten glass comes from an oven, and flows through a main channel of refractory material to be distributed according to a common type of configuration, in two transverse channels in the manner of a bar of T.
- This T bar is usually referred to as front-body, and under its bottom is arranged the plurality of fiber-drawing facilities.
- the defect observed in such a configuration and therefore such a distribution is the presence of a hot zone at the place where the hottest vein of the glass arrives, that is to say at the intersection of the bar of the T that is called upstream part of the forebody, and therefore at the level of the first two fiber drawing plants arranged on each side of this intersection; and on the contrary, at the ends of the T-bar, of the two downstream sides of the fore-body, the glass vein is cooler, the cooling being accentuated by the end wall of the channel of the fore-body.
- the temperature of the glass arriving in each fiberizing installation is therefore different according to the position of the fiberizing installation under the forebody and according to the geometrical particularity of this forebody.
- the glass plug block 8 comprises a rectangular opening 80 with four rounded corners, a channel 81 whose wall 82 connected to the opening has a slope which is identical over the entire periphery and is inclined at an acute angle with respect to the vertical defined by the outer wall 8a of the block.
- the wall 82 is extended by a vertical wall 83 parallel to the outer wall 8a and whose perimeter reproduces the rectangular rounded-corner geometrical shape of the opening 80.
- the intermediate block 9 has a channel 90 which extends the channel 81 and whose The wall 91 is vertical like the wall 83 and the opposite ends of opening 92 and 93 are also delimited by a rectangular shape with rounded corners.
- the thermal imbalance in the die can be corrected to ensure a homogeneous temperature, in particular by adapting the design and geometry of the forebody, and / or the glass block, and / or intermediate block.
- No. 6,044,666 discloses, for example, a particular arrangement of the interior of the glass plug block. Instead of having a single cavity over the entire length of the glass block and the intermediate block within which the molten material flows, this document discloses the presence of walls forming in place of the cavity, a plurality of inlet orifices and channels of distinct width thus diverting the main flow of glass to better mix when it arrives in the die.
- the invention has chosen to focus on the adaptation of the shape of the glass block and the intermediate block. It therefore aims to provide a particular geometry to these blocks so as to increase the thermal homogeneity of the glass entering the die to ultimately improve the thermal homogeneity of the glass at the exit of the die and therefore its viscosity, and this regardless of the shape of the die.
- the glass plug block for a fiberizing and melt-receiving installation has a single cavity which has a wall-defined flow channel and an inlet and outlet port. an outlet orifice which are located respectively at the two opposite ends of the channel, the inlet orifice being located at a face which is said upper face, which has two opposite lateral edges and two opposite longitudinal edges, and which presents a median longitudinal plane (P) extending along the widest extension of the face and another median plane (Y) extending in the smallest extension of the face.
- the glass gripping block is characterized in that the inlet orifice has an asymmetrical shape with respect to the median plane (Y) of the block extending in the smallest extension.
- the inlet of generally rectangular shape, is completely symmetrical, the invention allows the asymmetry to otherwise distribute the arrival of the glass in the cavity of the glass block to ensure output better temperature homogeneity.
- the inlet orifice has an upstream part intended to be arranged on the inlet side of the melt and a downstream part opposite to the upstream part with respect to the median plane (Y) extending according to the smaller extension, the upstream part being wider than the downstream part. It is meant throughout the rest of the description, upstream and downstream, the qualifiers that correspond to the upstream flow direction downstream of the melt in the forebody of the fiberizing installation.
- the inlet orifice has a profile along a closed line which has two points corresponding to the two points arranged closest to, respectively, the two longitudinal edges of the upper face of the block, the distance between these points being at least equal to 0.3 x L1, where L1 is the dimension separating the two longitudinal edges, and preferably greater than 0.5 x L1.
- the cavity of the block converges towards the outlet orifice.
- the ratio between the surface of the outlet orifice and the surface of the inlet orifice is less than 0.5.
- the inlet orifice has a profile along a closed line which comprises at least six portions, curved or linear, respectively connecting six points.
- the six points are connected by respectively six imaginary segments, two of which are called upstream lateral sides, are intended to be arranged on the side of the arrival of the flow of the melt, two so-called lateral sides downstream, are located opposite the upstream sides relative to the median plane (Y) extending according to the smallest extension, and two so-called intermediate sides, connect for each respectively an upstream lateral side and a downstream lateral side.
- the upstream lateral sides make an angle ⁇ with the longitudinal median plane (P) which is between 45 and 90 °.
- the downstream lateral sides make an angle ⁇ with the longitudinal median plane (P) which is between 0 and 60 °.
- the intermediate sides at the points of intersection with the upstream lateral sides make an angle ⁇ with the longitudinal median plane (P) which is between 0 and 45 °.
- the intermediate sides starting from the upstream lateral sides converge preferably in the direction of the longitudinal plane (P).
- the inlet orifice advantageously has a profiled line which is curved over its entire perimeter so that the wall of the cavity has a curved shape over the entire periphery without discontinuity, allowing a better flow of the material.
- the wall of the flow channel of the glass plug block has a slope from the inlet which is not uniform over the entire periphery of the wall.
- the wall has at least two different slopes. In particular, it has, on the upstream side of the inlet port a steeper slope than the slope which is located on the side of the downstream portion of the orifice, opposite the upstream portion.
- the invention also relates to the glass block described above and associated with an intermediate block, the two blocks being intended for a fiberizing installation, the intermediate block comprising a single cavity which has an inlet opening contiguous to the outlet port of the glass plug block, a wall and an outlet opening.
- the ratio between the height of the intermediate block and the height of the glass plug block is less than 0.6, and preferably less than 0.45.
- the cavity of the intermediate block has a flared shape in the direction of the outlet opening. If the glass plug block is shaped like a funnel with an asymmetrical section, the intermediate block has a shape in the manner of an inverted funnel, of asymmetrical section, and very collected in height.
- the invention relates to a fiber-drawing installation comprising a glass plug block and an intermediate block as described above, as well as a die provided with an inlet which is abutted at the outlet opening of the block. intermediate and is intended to receive the melt.
- the outlet opening of the intermediate block has a section which coincides with the section of the inlet of the die.
- the die has in known manner an axis of symmetry (X). If in the prior art, the inlet port of the glass plug block is completely symmetrical and has an axis of symmetry corresponding to that of the die, on the contrary in the invention, the midpoint of a segment The imaginary line separating two points farthest from the closed line profile of the inlet orifice of the glass plug block is eccentric with respect to the axis of symmetry (X) of the die. This configuration also contributes to the temperature homogeneity of the material arriving in the die.
- FIG. 1 is an exploded perspective view of a glass plug block and an intermediate block of the prior art intended for a fiber-drawing installation;
- FIG. 2 is a sectional view of the elements of FIG. 1;
- FIG. 3 is a sectional view of a portion of a fiberizing installation comprising the glass plug block and the intermediate block according to an exemplary embodiment of the invention, as well as a usual die;
- FIG. 4 is an exploded perspective view of the glass plug block and the intermediate block of FIG.
- FIG. 5 is a top view of the glass plug block of Figure 4.
- FIGS. 6 and 7 are top views of the glass plug block according to two other exemplary embodiments of the invention.
- Figure 8 shows a top view of a die grid indicating the temperature measurement points.
- Figure 3 is schematically illustrated a portion of a fiberizing installation 1a.
- the forebody 1b receives molten material such as glass flowing in the direction of the arrow F from upstream to downstream.
- the installation comprises a glass block 1 according to the invention, which receives from the channel of the forehearth the melt, an intermediate block 2 according to the invention in which flows the melt from the glass block 1, and a usual die 3 in which the glass arrives.
- the invention can of course apply to all types of melted material capable of being fiber, including thermoplastic material.
- the die 3 comprises in known manner and according to the arrival of the glass from top to bottom, a grid 30 on the upper face and a bottom 31 on its opposite face.
- the gate 30 is provided with openings not shown and ensures a slowing of the flow of glass delivered in the die.
- the grid also provides glass heating by Joule effect.
- the bottom 31 is provided with a plurality of orifices or pierced nipples 32 which extend over the almost total surface of the bottom to ensure the delivery of glass filaments to the outside of the die.
- FIG. 4 shows an exploded perspective view of the glass taking blocks 1 and 2 according to the invention. These blocks are made of refractory materials that resist thermal degradation, corrosion and erosion due to the flow of molten material.
- a ceramic material is generally used, which may be, for example, in the known manner, for example, alumina, silicon nitride, zirconia, or an alloy ODS (Oxide Dispersion Strengthened) based on nickel, or iron or titanium, or refractory alloy type including tungsten, or molybdenum or niobium.
- ODS Oxide Dispersion Strengthened
- Blocks 1 and 2 which are contiguous to each other, each comprise a single cavity 10 and 20 respectively in which the glass flows.
- the solution of making the blocks with a single cavity generates less wear than a plurality of channels as disclosed in the aforementioned prior art US 6,044,666.
- the blocks are preferably symmetrical with respect to the median plane P, which is vertical in the direction of casting of the glass from top to bottom, and extending parallel to the largest extension of the blocks.
- the invention has focused only on the shape of the cavities 10 and 20 of the blocks, the outer shape and the overall dimensions of the two blocks are those of the prior art.
- the blocks have parallelepipedal external shapes, and generally have external dimensions of the order of 0.3 to 2.5 m in length and 0.1 to 1 m in width.
- the cavity 10 of the glass plug block 1 has a flow channel 11 which is delimited by a wall 11a, an inlet orifice 12 which is located at the top face 14 of the block, coplanar with the bottom of the channel of the front body 1b in which the glass arrives, and an outlet opening 13 in the lower part which is situated at the opposite end of the inlet orifice 12, at the junction with the cavity 20 of the block intermediate.
- the cavity 20 of the intermediate block 2 has a flow channel 21 which is delimited by a wall 21a, an inlet opening 22 which is abutted at the outlet orifice 13 of the intermediate block, and an outlet opening 23 which is located at the junction with the die 3 by opening on the gate 30.
- the upper face 14 of the glass plug block is located, in the mounted position of the block in the fiberizing installation, in the plane of the bottom of the channel of the forebody 1b.
- the face 14 has, according to its small extension, two lateral edges which are opposite with respect to a median plane Y extending along the smallest extension of the block, and two longitudinal edges which are opposed with respect to the longitudinal median plane P.
- the face 14 here has a rectangular shape.
- the lateral edges are of width L1.
- the shape of the cavity 10 can be likened to a funnel shape whose inlet section 12 is asymmetrical, has an upstream portion P1 wider than its downstream part P2, and whose slope p6 of the wall 11a of the upstream side is steeper than the slope p3 of the downstream side.
- the cavity and therefore the inlet 12 have an asymmetrical shape with respect to the median plane Y extending along the smallest extension of the block.
- the inlet orifice 12 has an upstream portion P1 which is arranged on the inlet side of the melt and a downstream portion P2 opposite the upstream portion P1 with respect to the median plane Y.
- the upstream portion P1 is wider. than the downstream part P2.
- the inlet port 12 has a profile along a closed line which consists of linear or curved portions. Preferably, the profile is curved over the entire perimeter so as to provide for the cavity a wall of curved shape over the entire periphery without discontinuity.
- the profile comprises at least six portions 10a, 10b, 10c, 10d, 10e, 10f which respectively connect six points A1, A2, A3, A4, A5, A6.
- the segments D1 and D6 are called upstream lateral sides because they are arranged closest to the upstream side of the orifice.
- the segments D3 and D4 are called downstream lateral sides because they are located opposite the upstream sides with respect to the median plane Y.
- the segments D2 and D5 they each connect the upstream lateral side D1 and the downstream lateral side D3, and respectively the upstream lateral side D6 and the downstream lateral side D4.
- downstream lateral sides D3 and D4 which are here symmetrical along the longitudinal median plane P, form an angle ⁇ with said plane P which is between 0 and 60 °.
- the intermediate sides D2 and D5 which are here symmetrical along the longitudinal median plane P, are starting from the upstream lateral sides D1 and D6 convergent respectively towards the longitudinal plane P, thus ensuring that the downstream part P2 is smaller. than the upstream part P1.
- the intermediate sides D2 and D5 at the points of intersection A1, and respectively A5, with the upstream lateral sides D1, and respectively D6, make an angle ⁇ with the longitudinal median plane P which is between 0 and 45 °.
- the inlet orifice 12 is particularly large with respect to the width of the glass gripping block and therefore to the width of the channel of the front body, at the level of the upstream part P1, so that the two points A1 and A5 which correspond to the two points arranged closest to, respectively, the two longitudinal edges of the upper face 14, are distant by a length at least equal to 0.3 x L1, where L1 is the dimension separating the two longitudinal edges, and preferably greater than 0.5 x L1.
- the cavity 10 is convergent towards the outlet orifice 13, the surface S2 of the outlet orifice 13 being smaller than the surface S1 of the inlet orifice 12.
- the shrinkage is sufficiently large and is such that the ratio of the surfaces S2 / S1 is less than 0.5.
- the wall 11a of the flow channel 11 of the glass plug block has a slope which, starting from the line of the inlet orifice 12, is not uniform over the entire periphery of the wall .
- the slope of the wall changes at each of the six points A1, A2, A3, A4, A5, and A6. Because of the symmetry of the cavity relative to the plane P, only four slopes are distinct at the points A6, A1, A2, and A3 ( Figure 4). According to the invention, the slope p6 located at the most upstream end of the cavity, that is to say at point A6, is steeper than the slope p3 located at the downstream end of the cavity. cavity, that is to say at point A3.
- the intermediate block 2 has a flared shape in the direction of the outlet opening 23, the section of the inlet opening 22 corresponding to the narrowed section of the outlet orifice 13 of the glass plug block, while that the outlet opening 23 corresponds to the surface of the grid 30 of the die.
- this sudden widening of the section between the inlet opening 22 and the outlet opening 23 is made at a very small height.
- the intermediate block 2 has in the vertical a height much smaller than that of the glass plug block.
- H1 the height of the glass block 1 and the height H2 of the intermediate block
- the ratio H2 / H1 is less than 0.6, and preferably less than 0.45.
- Figures 6 and 7 illustrate other profiles of the opening 12 of the glass plug block.
- the thermal homogeneity was measured by taking a few temperature points at identical locations at the die gate for a reference fiberizing installation with glass and intermediate plug blocks according to the prior art, as described. in FIGS. 1 and 2, and for embodiment examples of the shape of the blocks according to the invention.
- the grid presents for the example a rectangular surface.
- the chosen points are distributed at a diagonal of the die according to its greatest extension.
- Two points T1 and T2 are located near the longitudinal edges of the die, one point T3 corresponds to the middle of the die and two other points T4 and T5 are located on either side of the point T3, midway from the middle of the die. the die and an angle of the die.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08845978A EP2209748A2 (fr) | 2007-10-29 | 2008-10-21 | Blocs de reception d'une matiere fondue, notamment du verre, et installation de fibrage pourvue de tels blocs |
US12/740,572 US20110036125A1 (en) | 2007-10-29 | 2008-10-21 | Blocks for receiving a molten material, especially glass, and fiberizing installation provided with such blocks |
MX2010004638A MX2010004638A (es) | 2007-10-29 | 2008-10-21 | Bloques para recibir un material fundido, especialmente vidrio, e instalacion de fibrado que se proporciona con estos bloques. |
CN2008801234235A CN101918332A (zh) | 2007-10-29 | 2008-10-21 | 接收熔融物质特别是玻璃的块体和设有这种块体的成纤设备 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0758641A FR2922884B1 (fr) | 2007-10-29 | 2007-10-29 | Blocs de reception d'une matiere fondue, notamment du verre, et installation de fibrage pourvue de tels blocs |
FR0758641 | 2007-10-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009056726A2 true WO2009056726A2 (fr) | 2009-05-07 |
WO2009056726A3 WO2009056726A3 (fr) | 2009-08-06 |
Family
ID=39327249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2008/051896 WO2009056726A2 (fr) | 2007-10-29 | 2008-10-21 | Blocs de reception d'une matiere fondue, notamment du verre, et installation de fibrage pourvue de tels blocs |
Country Status (7)
Country | Link |
---|---|
US (1) | US20110036125A1 (fr) |
EP (1) | EP2209748A2 (fr) |
CN (1) | CN101918332A (fr) |
FR (1) | FR2922884B1 (fr) |
MX (1) | MX2010004638A (fr) |
TW (1) | TW200936522A (fr) |
WO (1) | WO2009056726A2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2676937A1 (fr) * | 2012-06-21 | 2013-12-25 | 3B-Fibreglass SPRL | Module de plaque d'extrémité polygonale et ensemble filière comprenant de tels modules |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3837823A (en) * | 1973-12-13 | 1974-09-24 | Ppg Industries Inc | Bushing block assembly and screen |
WO1996009258A1 (fr) * | 1994-09-21 | 1996-03-28 | Owens-Corning | Systeme d'apport de verre a deux composants |
US6044666A (en) * | 1998-05-12 | 2000-04-04 | Ppg Industries Ohio, Inc. | Insulating flow and bushing blocks, bushing assemblies, fiber forming apparatus and method for forming fibers |
WO2005113462A1 (fr) * | 2004-05-14 | 2005-12-01 | Saint-Gobain Vetrotex France S.A | Filiere pour la fabrication de filaments notamment de verre et son installation de fibrage |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3539318A (en) * | 1967-11-24 | 1970-11-10 | Owens Corning Fiberglass Corp | Apparatus for producing fibers |
DE10344205B4 (de) * | 2003-09-22 | 2005-09-08 | Schott Ag | Vorrichtung und Verfahren zum Herstellen von Glasfasern |
-
2007
- 2007-10-29 FR FR0758641A patent/FR2922884B1/fr not_active Expired - Fee Related
-
2008
- 2008-10-21 EP EP08845978A patent/EP2209748A2/fr not_active Withdrawn
- 2008-10-21 US US12/740,572 patent/US20110036125A1/en not_active Abandoned
- 2008-10-21 WO PCT/FR2008/051896 patent/WO2009056726A2/fr active Application Filing
- 2008-10-21 CN CN2008801234235A patent/CN101918332A/zh active Pending
- 2008-10-21 MX MX2010004638A patent/MX2010004638A/es unknown
- 2008-10-23 TW TW097140663A patent/TW200936522A/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3837823A (en) * | 1973-12-13 | 1974-09-24 | Ppg Industries Inc | Bushing block assembly and screen |
WO1996009258A1 (fr) * | 1994-09-21 | 1996-03-28 | Owens-Corning | Systeme d'apport de verre a deux composants |
US6044666A (en) * | 1998-05-12 | 2000-04-04 | Ppg Industries Ohio, Inc. | Insulating flow and bushing blocks, bushing assemblies, fiber forming apparatus and method for forming fibers |
WO2005113462A1 (fr) * | 2004-05-14 | 2005-12-01 | Saint-Gobain Vetrotex France S.A | Filiere pour la fabrication de filaments notamment de verre et son installation de fibrage |
Also Published As
Publication number | Publication date |
---|---|
WO2009056726A3 (fr) | 2009-08-06 |
FR2922884B1 (fr) | 2011-11-25 |
EP2209748A2 (fr) | 2010-07-28 |
FR2922884A1 (fr) | 2009-05-01 |
US20110036125A1 (en) | 2011-02-17 |
TW200936522A (en) | 2009-09-01 |
CN101918332A (zh) | 2010-12-15 |
MX2010004638A (es) | 2010-05-13 |
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