US3787195A - Apparatus for the production of sheets or mats from fibers of thermoplastic material - Google Patents

Apparatus for the production of sheets or mats from fibers of thermoplastic material Download PDF

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US3787195A
US3787195A US00136132A US3787195DA US3787195A US 3787195 A US3787195 A US 3787195A US 00136132 A US00136132 A US 00136132A US 3787195D A US3787195D A US 3787195DA US 3787195 A US3787195 A US 3787195A
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fibers
shaping member
conveyor
inlet
outlet end
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J Kirchheim
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Compagnie de Saint Gobain SA
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Compagnie de Saint Gobain SA
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • 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
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/06—Manufacture of glass fibres or filaments by blasting or blowing molten glass, e.g. for making staple fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • D04H1/4226—Glass fibres characterised by the apparatus for manufacturing the glass fleece
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay

Definitions

  • ABSTRACT The invention concerns the production of homogeneous and structurally resistant sheets or mats of thermoplastic fibers, such as glass fibers, issuing from one or more spinnerettes above a travelling conveyor.
  • the fibers are deposited on the conveyor after being blown through a stationary skirt or conduit formed essentially of a pair of large plane surfaces having critically controlled spacings therebetween to attain predetermined cross-sectional areas between the inlet and outlet end of the conduit, as well as adjustable outlines of the outlet.
  • variable and/or adjustable sectional areas serve to control the pattern and area of deposition of the fibers on'the conveyor.
  • a plurality of spinnerettes and guide conduits may be arranged in different patterns and alignments relative to the direction of travel of the conveyor to control the laying-up of the fibers and consequently the physical characteristics of the deposited mat.
  • Additional trapezoidally shaped shaping members also each formed essentially of a pair of large plane surfaces with an inlet and outlet, as well as intermediate sections of predetermined or adjustable areas, may be used in lieu of or in conjunction with the above-mentioned skirts or conduits.
  • shaping members are fitted with openings and/or blowers for air or gaseous currents to afford a convenient control of the entrainment of the dropping fibers passing therethrough, which discharge from the outlet ends of said members, which are spaced a slight distance above the travelling conveyor.
  • the present invention relates to apparatus for, the production of sheets or mats from fibers of thermoplastic materials, particularly glass fibers produced by a drawing plate or spinning nozzles, and which are entrained by gaseous currents onto a perforated conveying member, below which is disposed a suction box.
  • a feeder or bushing with a drawing plate is used, the orifices of which are arranged horizontally and in parallel rows in the direction of movement of the conveying member.
  • a blower is disposed below this drawing plate, in proximity with and parallel thereto, for delivering a gaseous fluid under pressure, such as air or steam, which acts by induction on the filaments of molten material, in order to transform them into fibers by separating and attenuating them.
  • This blower is integrally connected at its lower end with a sleeve having vertical walls of rectangular section, known also as a fixed hood or skirt, which is adapted to channel the gaseous jet and the produced fibers toward the conveyor member.
  • the device described above may be completed advantageously by two rectangular plates located symmetrically on both sides of the jet of fibers in the direction of the conveyor member, each being movable about a horizontal axis, parallel to the direction of the movement of the conveyor, with each axis being also coincident with the upper edge of the respective plate.
  • These plates which may also be designated movable deflectors, are actuated by a synchronized oscillating movement, at a frequency of 240 to 600 pulsations per minute, and with such an angular amplitude that the oscillations transmitted to the jet of fibers effect the distribution of the latter over the entire width of the conveyor.
  • each of the movable deflectors is activated in synchronism, but with a phase lag, in such a way that at each instant the different jets of fibers are combined on the conveyor member.
  • the fiber drawing plate or plates disposed above the conveyor are provided below the level of the blower members, which effect the drawing-out of the fibers, with skirts or conduits comprising two large surfaces of generally flat shape, the planes of which converge in the direction of travel of the gaseous fluid and are symmetrical with respect to the principal axis of said skirts.
  • the latter have an outlet opening of a cross-section at least equal to that of the inlet opening, to channel the gaseous fluid, as well as the air or induced fluid, so as to disperse the entrained fibers and to effect their uniform distribution on the conveyor member.
  • the skirts are furnished with selective clamping means which permit a modification of the shape of the crosssection of the outlet passage, to control the flow and direction of the gaseous jets entraining the fibers, and consequently the distribution of said fibers on the conveyor member.
  • clamping or tightening means may be constituted by screws or threaded bolts acting separately on the lower part of each large base of the skirt, which are screwed against a stationary part independent of the skirt. For example, if the opening at the outlet of the skirt is reduced to a maximum extent by tightening, with the two large edges of this outlet opening remaining substantially parallel, the resulting jet of fibers is spread out greatly, which at the level of the conveyor, covers a great distance.
  • the clamping is so regulated as to obtain a considerable opening at the parallel edges, it is found that the path of the sheaf or bundle of fibers on the conveyor is much shorter, its length being of the order of that of the drawing-plate itself. If intermediate adjustments are made, such as tightening of the outer screws and loosening of the central screws, a sheaf is obtained having a path on the conveyor which approximates a circular form. In the case where the outer screws are loosened and the central screws are tightened, there results a division of the jet in two, with the fibers separating on the conveyor into two parts. In like manner, by appropriate adjustment of the clamping screws, jets of fibers of different sections and directed toward any part of the conveyor may be obtained.
  • the drawing plate or spinnerette, the blower and the accompanying fixed skirt are placed transversely relative to the direction of movement of the conveyor.
  • the adjustable outlet of the skirt it is possible to spread out the jet of fibers in a uniform manner over the entire width of the conveyor, which operation, combined with the advance of the conveyor, gives rise to the production of homogeneous sheets of fibers. Consequently, the skirts with an adjustable outlet makes possible the elimination of the movable deflectors which are used in known apparatus.
  • each device produces an elemental sheet of the width of the conveyor, the elemental sheets being superposed one on the other without disturbing in the least, the distribution of the fibers. Thereby is eliminated the presence of wicks and tufts of fibers in the finished products.
  • each of the skirts is regulated in such a way that each of the spinnerettes affects only one zone of the conveyor member, so that the assembly of these skirts effects a homogeneous distribution of the fibers over the entire surface of the conveyor.
  • the apparatus may comprise a shaping member discharging in proximity to the conveyor member and having two large surfaces of generally plane shape, converging at least at one portion of their length in the zone near the outlet section.
  • This shaping member may be placed immediately below the level of the blower which effects the drawing-out of the fibers, with the skirts or conduits according to the invention forming an integral part with the two large plane surfaces of this shaping member.
  • the invention also contemplates the positioning of the shaping member immediately below the level of the skirts or conduits in accordance with the invention described above, with air induction being attained inside the shaping member between the outlet of the skirts or conduits and the inlet of said shaping member.
  • control of the regularity, the quantity, as well as the decrease of speed of flow of the gaseous fluid entraining the fibers in the shaping organ is effected by the conjugate action of the variation of the section of this shaping organ and the introduction of additional fluids.
  • the means provided for the introduction of additional fluids are placed and regulated in such a way that the quantity of fluid per unit of area remains substantially constant across all the transverse sections of the shaping member.
  • FIG. 1 is a perspective view of a device according to the invention, at the upper portion of the apparatus;
  • FIG. 2 is a vertical sectional view of the skirt and its regulating members, along a longitudinal plane transverse to the axis of the drawing plate;
  • FIG. 3 is a front elevation of the apparatus for producing a sheet of fibers over the entire width of the conveyor;
  • FIG. 3a is a bottom view of the outlet slotofthe skirt
  • FIG. 4 is-an end view of the apparatus showing two devices placed one after the other in the direction movement of the conveyor member;
  • FIG. 5 is a front elevation of the apparatus, so adjusted as to produce a sheet of fibers over half of the width of the conveyor;
  • FIG. 5a is a bottom view of the outlet slot of the skirt shown in FIG. 5; Y
  • FIG. 6 is a front elevation of the apparatus, so ad justed as to produce a sheet of fibers on the other half of the width of the conveyor; 1
  • FIG. 6a is a bottom view of the outlet slot of the skirt shown in FIG. 6;
  • FIG. 7 is an end view showing two successive devices projecting the fibers over one half of the width of the conveyor, and the other half, respectively, in order to obtain a uniform deposit over the entire breadth of the conveyor;
  • FIG. 8 is a front elevation of the apparatus so adjusted as to produce a deposit of fibers of circular form on the conveyor;
  • FIG. 8a is a bottom view of the outlet slot of the skirt shown in FIG. 8;
  • FIG. 9 is an end view showing two successive devices each producing a circular shaped deposit, these devices being staggered transversely in the direction of travel of the conveyor;
  • FIG. 10 is a front elevation of an apparatus producing two distinct jets of fibers
  • FIG. 10a is abottom view of the outlet slot of the skirt shown in FIG. 10;
  • FIG. 11 is an end view showing two devices, one of which produces two distinct jets of fibers, and the other one, a single jet of fibers in the space between the preceding ones;
  • FIGS. 12 to 15, on the first sheet of the drawings, with FIG. I, are schematic plan views of distribution of the devices above the conveyor;
  • FIG. 16 is a schematic front view of another embodiment of the invention.
  • FIG. 17 is a vertical sectional view of FIG. 16 through a plane perpendicular to the axis of the drawing plate;
  • FIG. 18 is a vertical sectional view, similar to FIG. 17, of a variant from the apparatus shown in FIG. 16;
  • FIG. 19 is a perspective view of another embodiment of the invention.
  • FIG. 20 is a vertical sectional view of FIG. 19, through a plane perpendicular to the axis of the drawing plate or spinnerette;
  • FIG. 21 is a front view of still another embodiment of the invention.
  • FIG. 22 is a vertical sectional view of FIG. 21 along a plane perpendicular to the axis of the drawing plate or spinnerette;
  • FIG. 23 is a vertical sectional view, similar to FIG. 22, of a variant of the apparatus shown in FIG. 22;
  • FIG. 24 is a front view of another embodiment of the invention.
  • FIG. 25 is a vertical sectional view of FIG. 24, through a plane perpendicular to the axis of the spinnerette.
  • FIG. 1 of the drawings is shown the body 1 containing a mass of molten glass.
  • a row 3 of spinning nozzle orifices is disposed below the chamber 1.
  • the skirt 4 the upper opening of which is opposite the row of orifices 3 of the spinnerette and which empties into the casing 5 communicating with a source of fluid under pressure.
  • the outlet slot of the skirt is shown at 12.
  • the large surfaces of the skirt are trapezoidal in shape and converge towards the enlarged base of the skirt.
  • Frame supports 6 are affixed to the casing 5, and adjusting screws 10 are mounted on the former for acting on surfaces 11 of the skirt.
  • the mounting details of the regulating screws 10 are shown in FIG. 2.
  • the adjusting screws ll) acting on the lower part of the surfaces 11. of the skirt are regulated so that outlet slot 12 is of constant width.
  • the sheet 13 of projected fibers is deposited on conveyor M along its entire breadth, said conveyor moving continuously in the direction perpendicualr to the rows of orifices of the spinnerette. lBy regulating the screws, slots of greater or smaller width may be obtained, which permits the obtention of sheets of greater or lesser thickness.
  • the fibers from device 15 are projected along a sheet 13 involving only one part of the surface of the conveyor.
  • This regulation can be effected so that the deposit of fibers on conveyor 14 takes place only on half the width of the latter.
  • a second device 115a (FIGS. 6 and 7), may be used, which may be positioned following and in line with the first, and the outlet slot 312a of which has the same shape as that of the preceding device 15, but with its width diminishing in an inverse ratio as indicated in FIG.
  • FIG. 8 illustrates a device 115 with a skirt having regulating screws 10 which may be adjusted in such a way that the outer screws are tightened while the median screw is loosened to form a slot 12 having the shape shown in FIG. 8a. Thereby, a sheaf of fibers 113 is obtained, the projection of which on the conveyor 14 approximates a circular form.
  • FIG. 10 illustrates a device 15 with the skirt having regulating screws 10 which permit the outer screws to be loosened while the median screw is tightened.
  • Slot 12 then has the form shown in FIG. 10a. This shape of slot permits obtaining two jets of fibers 13, 13a diverging from one another and oriented toward the sides of the conveyor.
  • a second device 15a may be associated with this device 15, as indicated in FIG. 11, such as, for example, a device whose screws may be adjusted as shown in FIG. 8a, to produce a jet of fibers 13a directed toward the middle of the conveyor.
  • spray guns or weirs may be provided downstream from the point of formation of the sheet on the conveyor for applying a composition to the fibers.
  • FIGS. 12 to 15 illustrate by way of example, different arrangements for distributing the devices 15 above conveyor 14.
  • the devices 15 are abreast of each other with respect to the direction of movement of the conveyor.
  • the devices are in a quincuncial pattern. With these arrangements the formation of wicks is avoided, while obtaining sheets or pads of large widths.
  • the devices are in a single file or line with respect to the direction of travel of the conveyor. The formation of cores or wicks is avoided, while also multiplying the number of layers formed on the conveyor.
  • the homogeneous distribution of the fibers on the conveyor is obtained by suitable clamping expedients imposed on the skirts, as described above.
  • the devices 15 are disposed abreast of each other with respect to the direction of movement of the conveyor as well as with their large axes parallel to the latter. This arrangement also results in the elimination of wicks and obtaining sheets or mats of large width.
  • the half-angle a at the top of the large trapezoidal surfaces 11, as shown in FIG. 3, may be given a value of about 15.
  • these large surfaces may be toed-in or caused to converge before any regulation; for example, the spacing between these surfaces at the inlet end at the top may be about 7mm., and at the outlet end at the bottom, 5.4mm.
  • FIGS. 16 to 18 a shaping member, designated generally by reference character 17, which discharges in proximity to the conveyor 14.
  • This shaping member 17 comprises two large surfaces 18 and 19 of generally plane shape. In the embodiment illustrated in FIG. 17, these two large plane surfaces 18 and 19 converge along a part of their length located in the zone adjacent to the outlet section. These convergent parts are designated by reference characters 18' and 19.
  • the two large surfaces 18 and 19 of the shaping member are convergent over their entire length.
  • the shaping member, in the embodiments illustrated in FIGS. 16 to 18, is placed immediately below the level of the blower members 5, which effect the drawing-out or attenuation of the fibers, with the skirts or conduits described above constituting an integral part of the two large surfaces 18 and 19 of the shaping member 17.
  • the shaping member 17 is placed immediately below the level of the skirts or conduits described above and indicated schematically at 4.
  • the shaping member is constituted by an elongated skirt whose two large plane surfaces 18 and 19 are trapezoidal in shape. In this embodiment, these two large plane surfaces are convergent over their entire height (FIG. 20)., but, as described above, these two large plane surfaces may converge along only part of their length, namely, along the part near the outlet section 20.
  • clamping means are provided, which may assume the form of screw 21, in engagement with threaded rods 22, which act on the large faces of the shaping member 17 suitable sizing by means of connectors which, in this example, are constituted by angle irons 23.
  • the sheet of fibers projected through the shaping member 17 is deposited on the conveyor member 14, which is moved continuously in the direction perpendicular to the rows of orifices of the spinnerette. An induction of air takes place on the inside of the shaping member, between the outlet of the skirts or conduits 4, and the intake 25 of said shaping member.
  • the control of the regularity, quantity and decrease of speed of flow of the gaseous fluid entraining the fibers is effected by the cooperative action between the variation of the crosssection of the shaping member 17 and the introduction of additional fluids.
  • the introduction of additional fluids was realized in the form of induced air.
  • this introduction is controlled in such a way that the quantity of fluid per unit of surface area remains substantially constant through all the transverse sections of the shaping member.
  • the cross-section of the opening may be varied by operating the clamping means so as to obtain a volume of induced air from eight to times the volume of the gas leaving the skirt conduit.
  • the outlet section 20 and inlet section of the shaping member are also regulated in the same manner so that the area of the outlet section 20 is of the order of one to two times that of the inlet section 25.
  • the speed of the gaseous fluid bearing the fibers at the inlet 25 of the shaping member should advantageously be one to five times that at the outlet 20.
  • the following values have provenpractical:
  • FIGS. 21 to 25 have for their objective the capability of introducing a volume of additional fluids either in the form of a controlled induction of air, or in the form of air or steam introduced by means of blower members in an amount corresponding to the increase in volume in the shaping member.
  • This quantity of additional fluids should correspond to the increased crosssection of the shaping member between the flaring walls of the latter. Thereby is attained, over the entire height of the shaping member, a constant quantity of fluid per unit of surface at each section, and consequently a flow of reduced turbulence.
  • the shaping member is of a design similar to that shown in the preceding figures, but it has openings, arranged here in the form of shutters 27, which are preferably regulatable, and which permit the induction of air.
  • the shutters 27 are placed on each of the large surfaces of the shaping member.
  • blower members 32,33 are provided and arranged in such a way as to introduce additional gaseous fluids into the shaping member.
  • one of these blowers 32 is shown positioned at the upper opening of the shaping member and a second blower 33 discharging over one of the shutters 27 at an intermediate level. It goes without saying that the number, position, and distribution of these blowers will be determined as a function of each particular case, in order to achieve the control conditions of the invention as set forth above.
  • the large surfaces of .the shaping member are convergent only at 34, over a portion of their length near the conveyor 14, while that in FIG. 23, they are convergent over their entire length.
  • the shaping member is constituted by sev-' eral superposed elements, such as 28, 29, between which air is induced. These elements have two large plane surfaces which converge over at least a portion of their length, at the portions thereof adjacent to their outlet. In the arrangement shown in FIG. 25, the large plane surfaces are shown convergent over their entire lengths.
  • the outlet 38 of one of the shaping members is lower than the intake 39 of the following member.
  • the outlet section 40 of each member is at least equal to that of the intake section 39 of the same member.
  • blower members 35 and 36 which are adapted to introduce gaseous fluids into the interior of the shaping member under the same conditions as set forth above.
  • Blower 35 is positioned at the inlet of the shaping member and blower 36 is located between two successive elements at a lower level.
  • blowers similar to 36, may be provided at addtional levels.
  • the devices of the present invention have the particular advantage of avoiding the regrouping of the fibers and of spreading them on the conveyor without forming packs, bundles or nodules. They also make possible an improvement in the resistance of the sheet, for example, in the case of the embodiment shown in FIGS. 24 and 25, by a deformation and/or change of orientation of at least one of the successive elements of the shaping member, which gives rise to a preferential orientation of the fibers on the conveyor.
  • the travelling conveyor 14 is illustrated in the several figures of the drawings only schematically. Its airpermeable characteristics may be realized by the use of perforated or woven sheets of metal, textile or composite fabrics, with preferably a suction box therebelow, as is known in the art.
  • An apparatus for producing mats of thermoplastic material comprising a. a spinnerette for said material in a molten state comprising a chamber for the material with at least one row of nozzles in the bottom thereof wherefrom flow downwardly filaments of the molten material toward a travelling conveyor therebelow and spaced a substantial distance therefrom so that the fibers experience a free drop before deposition on said conveyor,
  • a stationary conduit below said blowing chamber comprising a pair of large plane surfaces of symmetrical outline with respect to the vertical axis of said conduit
  • said shaping member comprising a pair of large plane surfaces of symmetrical outline with respect to the vertical axis of said member, having a slight convergence at least adjacent to the outlet end thereof, while the cross-section of the outlet end is at least as great as that of the inlet end, and
  • said outlet end being disposed in proximity to said travelling conveyor but in spaced relation thereto to disperse the fibers from said outlet end for uniform distribution thereof onto said travelling conveyor.
  • An apparatus as set forth in claim ll including means for introducing additional gaseous fluids into said shaping member on at least one level thereof for controlling the entrainment of the fibers therethrough.
  • An apparatus for producing mats of thermoplastic material comprising a. a spinnerette for said material in a molten state comprising a chamber for the material with at least one row of nozzles in the bottom thereof wherefrom flow downwardly filaments of the molten material toward a travelling conveyor therebelow and spaced a substantial distance therefrom so that the fibers experience a free drop before deposition on said conveyor,
  • a stationary conduit below said blowing chamber comprising a pair of large plane surfaces of symmetrical outline with respect to the vertical axis of said conduit
  • said shaping member comprising a pair of large plane surfaces of symmetrical outline with respect to the vertical axis of said member, having a slight convergence at least adjacent to the outlet end thereof, while the cross-section of the outlet end is at least as great as that of the inlet end, and
  • said outlet end being disposed in proximity to said travelling conveyor but in spaced relation thereto to disperse the fibers from said outlet end for uniform distribution thereof onto said travelling conveyor.
  • An apparatus for producing mats of thermoplastic material comprising a. a spinnerette for said material in a molten state comprising a chamber for the material with at least one row of nozzles in the bottom thereof wherefrom flow downwardly filaments of the molten material toward a travelling conveyor therebelow and spaced a substantial distance therefrom so that the fibers experience a free drop before deposition on said conveyor,
  • a stationary conduit below said blowing chamber comprising a pair of large plane surfaces of symmetrical outline with respect to the vertical axis of said conduit
  • said shaping member comprising a pair of large plane surfaces of symmetrical outline with respect to the vertical axis of said member, having a slight convergence at least adjacent to the outlet end thereof, while the cross-section of the outlet end is at least as great as that of the inlet end,
  • said outlet end being disposed in proximity to said travelling conveyor but in spaced relation thereto to disperse the fibers from said outlet end for uniform distribution thereof onto said travelling conveyor, and
  • said shaping member being constituted by a plurality of superposed elements spaced from each other by spacing gaps, said last-mentioned gaps providing passages for the entry of air into said shaping member.
  • An apparatus for producing mats of thermoplastic material comprising a. a spinnerette for said material in a molten state comprising a chamber for the material with at least one row of nozzles in the bottom thereof wherefrom flow downwardly filaments of the molten material toward a travelling conveyor therebelow and spaced a substantial distance therefrom so that the fibers experience a free drop before deposition on said conveyor,
  • a stationary conduit below said blowing chamber comprising a pair of large plane surfaces of symmetrical outline with respect to the vertical axis of said conduit
  • said shaping member comprising a pair of large plane surfaces of symmetrical outline with respect to the vertical axis of said member, having a slight convergence at least adjacent to the outlet end thereof, while the cross-section of the outlet end is at least as great as that of the inlet end, and
  • said outlet end being disposed in proximity to said travelling conveyor but in spaced relation thereto to disperse the fibers from said outlet end for unifonn distribution thereof onto said travelling conveyor.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
US00136132A 1970-04-29 1971-04-21 Apparatus for the production of sheets or mats from fibers of thermoplastic material Expired - Lifetime US3787195A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7015678A FR2085525B1 (de) 1970-04-29 1970-04-29
FR7033876A FR2108162B2 (de) 1970-04-29 1970-09-18

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JP (1) JPS5145704B1 (de)
BE (1) BE766432A (de)
BR (1) BR7102534D0 (de)
CA (1) CA931756A (de)
CH (1) CH548472A (de)
CS (1) CS164887B2 (de)
DK (1) DK141400B (de)
ES (1) ES390691A1 (de)
FI (1) FI52967C (de)
FR (2) FR2085525B1 (de)
GB (2) GB1359003A (de)
HU (1) HU166151B (de)
NL (1) NL166290C (de)
NO (1) NO129342B (de)
RO (1) RO63891A (de)
SE (1) SE370384B (de)
TR (1) TR18705A (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001357A (en) * 1972-08-02 1977-01-04 Alfred Walz Process for the manufacture of fibers from fusible materials
US4058385A (en) * 1974-06-10 1977-11-15 Owens-Corning Fiberglas Corporation Method for transporting glass fibers
US4168959A (en) * 1977-02-16 1979-09-25 Johns-Manville Corporation Method and apparatus for distribution of glass fibers
US4337074A (en) * 1980-04-25 1982-06-29 Bayer Aktiengesellschaft Process for production of mineral wool fibers
US4414010A (en) * 1982-06-21 1983-11-08 Manville Service Corporation Apparatus for attenuating mineral fibers
US4487622A (en) * 1981-12-28 1984-12-11 Isover Saint-Gobain Method and apparatus for forming fiber webs
US4489462A (en) * 1983-03-17 1984-12-25 E. I. Du Pont De Nemours And Company Air flow control apparatus for a fiber air-lay machine
US4567078A (en) * 1984-07-03 1986-01-28 Fiberglas Canada Inc. Process and apparatus to crimp fibres
US4692106A (en) * 1985-02-05 1987-09-08 Reifenhauser Gmbh & Co. Maschinenfabrik Apparatus for stretching the individual strands of a bundle of fibers or threads
US4812112A (en) * 1987-04-25 1989-03-14 Reifenhauser Gmbh & Co. Maschinenfabrik Apparatus for making a spun fleece from endless synthetic-resin filament
US4813864A (en) * 1987-04-25 1989-03-21 Reifenhauser Gmbh & Co. Maschinenfabrik Apparatus for making a spun-filament fleece
US4820459A (en) * 1987-04-25 1989-04-11 Reifenhauser Gmbh & Co. Maschinenfabrik Process for making spun-filament fleece from endless synthetic resin filament
US4838774A (en) * 1987-01-21 1989-06-13 Reifenhauser Gmbh & Co Maschinenfabrik Apparatus for making a spun-filament fleece
US4861362A (en) * 1988-05-25 1989-08-29 Denniston Donald W Method and apparatus for forming fibers from thermoplastic materials
US4889546A (en) * 1988-05-25 1989-12-26 Denniston Donald W Method and apparatus for forming fibers from thermoplastic materials
US5296013A (en) * 1991-12-17 1994-03-22 Grunzweig & Hartmann Ag Process and apparatus for the continuous production of mineral wool nonwovens
US5591335A (en) * 1995-05-02 1997-01-07 Memtec America Corporation Filter cartridges having nonwoven melt blown filtration media with integral co-located support and filtration

Citations (4)

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US2230270A (en) * 1936-12-24 1941-02-04 Owens Corning Fiberglass Corp Apparatus for forming webs of fibrous material
US2881471A (en) * 1954-12-28 1959-04-14 Owens Corning Fiberglass Corp Apparatus for forming and treating fibers
US3220812A (en) * 1961-10-17 1965-11-30 Owens Corning Fiberglass Corp Apparatus for forming and collecting fibers
US3532479A (en) * 1969-07-15 1970-10-06 Owens Corning Fiberglass Corp Apparatus for producing glass fibers

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US2565941A (en) * 1946-06-17 1951-08-28 Reconstruction Finance Corp Method and apparatus for producing laminated materials
FR965048A (de) * 1947-04-28 1950-08-31
FR1031448A (de) * 1951-01-26 1953-06-19
NL264233A (de) * 1960-05-05
US3302237A (en) * 1965-01-15 1967-02-07 Du Pont Forwarding jet
US3334161A (en) * 1965-02-10 1967-08-01 Du Pont Filament forwarding jet device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230270A (en) * 1936-12-24 1941-02-04 Owens Corning Fiberglass Corp Apparatus for forming webs of fibrous material
US2881471A (en) * 1954-12-28 1959-04-14 Owens Corning Fiberglass Corp Apparatus for forming and treating fibers
US3220812A (en) * 1961-10-17 1965-11-30 Owens Corning Fiberglass Corp Apparatus for forming and collecting fibers
US3532479A (en) * 1969-07-15 1970-10-06 Owens Corning Fiberglass Corp Apparatus for producing glass fibers

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001357A (en) * 1972-08-02 1977-01-04 Alfred Walz Process for the manufacture of fibers from fusible materials
US4058385A (en) * 1974-06-10 1977-11-15 Owens-Corning Fiberglas Corporation Method for transporting glass fibers
US4168959A (en) * 1977-02-16 1979-09-25 Johns-Manville Corporation Method and apparatus for distribution of glass fibers
US4337074A (en) * 1980-04-25 1982-06-29 Bayer Aktiengesellschaft Process for production of mineral wool fibers
US4419117A (en) * 1980-04-25 1983-12-06 Bayer Aktiengesellschaft Apparatus for production of mineral wool fibers
US4487622A (en) * 1981-12-28 1984-12-11 Isover Saint-Gobain Method and apparatus for forming fiber webs
US4414010A (en) * 1982-06-21 1983-11-08 Manville Service Corporation Apparatus for attenuating mineral fibers
US4489462A (en) * 1983-03-17 1984-12-25 E. I. Du Pont De Nemours And Company Air flow control apparatus for a fiber air-lay machine
US4567078A (en) * 1984-07-03 1986-01-28 Fiberglas Canada Inc. Process and apparatus to crimp fibres
US4692106A (en) * 1985-02-05 1987-09-08 Reifenhauser Gmbh & Co. Maschinenfabrik Apparatus for stretching the individual strands of a bundle of fibers or threads
US4838774A (en) * 1987-01-21 1989-06-13 Reifenhauser Gmbh & Co Maschinenfabrik Apparatus for making a spun-filament fleece
US5028375A (en) * 1987-01-21 1991-07-02 Reifenhauser Gmbh & Co. Maschinenfabrik Process for making a spun-filament fleece
US4812112A (en) * 1987-04-25 1989-03-14 Reifenhauser Gmbh & Co. Maschinenfabrik Apparatus for making a spun fleece from endless synthetic-resin filament
US4820459A (en) * 1987-04-25 1989-04-11 Reifenhauser Gmbh & Co. Maschinenfabrik Process for making spun-filament fleece from endless synthetic resin filament
US4851179A (en) * 1987-04-25 1989-07-25 Reifenhauser Gmbh & Co. Maschinenfabrik Method of operating a fleece-making apparatus
US4813864A (en) * 1987-04-25 1989-03-21 Reifenhauser Gmbh & Co. Maschinenfabrik Apparatus for making a spun-filament fleece
US4861362A (en) * 1988-05-25 1989-08-29 Denniston Donald W Method and apparatus for forming fibers from thermoplastic materials
US4889546A (en) * 1988-05-25 1989-12-26 Denniston Donald W Method and apparatus for forming fibers from thermoplastic materials
US5296013A (en) * 1991-12-17 1994-03-22 Grunzweig & Hartmann Ag Process and apparatus for the continuous production of mineral wool nonwovens
US5368623A (en) * 1991-12-17 1994-11-29 Grunzweig & Hartmann Ag Process and apparatus for the continuous production of mineral wool nonwovens
US5591335A (en) * 1995-05-02 1997-01-07 Memtec America Corporation Filter cartridges having nonwoven melt blown filtration media with integral co-located support and filtration
US5681469A (en) * 1995-05-02 1997-10-28 Memtec America Corporation Melt-blown filtration media having integrally co-located support and filtration fibers
US5733581A (en) * 1995-05-02 1998-03-31 Memtec America Corporation Apparatus for making melt-blown filtration media having integrally co-located support and filtration fibers

Also Published As

Publication number Publication date
TR18705A (tr) 1977-08-10
NL166290B (nl) 1981-02-16
FR2085525B1 (de) 1975-01-10
JPS5145704B1 (de) 1976-12-04
ES390691A1 (es) 1973-07-01
GB1359003A (en) 1974-07-03
BE766432A (fr) 1971-10-28
CH548472A (fr) 1974-04-30
FI52967C (de) 1978-01-10
NL7105438A (de) 1971-11-02
CA931756A (en) 1973-08-14
DE2118081A1 (de) 1971-11-11
FR2108162A2 (de) 1972-05-19
FI52967B (de) 1977-09-30
RO63891A (fr) 1979-05-15
HU166151B (de) 1975-01-28
CS164887B2 (de) 1975-11-28
DE2118081B2 (de) 1975-11-27
DK141400C (de) 1980-09-01
GB1359001A (en) 1974-07-03
FR2108162B2 (de) 1975-01-10
BR7102534D0 (pt) 1973-03-29
NO129342B (de) 1974-04-01
DK141400B (da) 1980-03-10
NL166290C (nl) 1981-07-15
SE370384B (de) 1974-10-14
FR2085525A1 (de) 1971-12-24

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