Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H45/00—Folding thin material
  • B65H45/02—Folding limp material without application of pressure to define or form crease lines
  • B65H45/06—Folding webs
  • B65H45/10—Folding webs transversely
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H45/00—Folding thin material
  • B65H45/02—Folding limp material without application of pressure to define or form crease lines
  • B65H45/06—Folding webs
  • B65H45/10—Folding webs transversely
  • B65H45/101—Folding webs transversely in combination with laying, i.e. forming a zig-zag pile
  • B65H45/107—Folding webs transversely in combination with laying, i.e. forming a zig-zag pile by means of swinging or reciprocating guide bars
• • 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
  • D04H1/74—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 orientated, e.g. in parallel (anisotropic fleeces)

Definitions

• the present invention relates to a process for feeding a thin binder impregnated uncured mineral wool web on a receiving con ⁇ veyor and to a device for carrying out the process according to the preamble of claims 1 and 9.
• 2 weight varies in the range of 110 to 450 g/m , preferably 100 to 200 g/m is collected on a collecting conveyor immediately after the defibration.
• the spe of the primary web as well as that of its conveying devices has be high.
• the speed of the primary web is over 100 m/mi however, the basis weight of the primary web being only in the
• the pendulum mechanism usually has comprised an ope ⁇ ration, in which the extreme positions have been highest above the receiving conveyor, and the lower dead point of the pendulum has been closest to the receiving conveyor.
• the out ⁇ put rate of the pendulum conveyors should increase, however this is not feasible with known devices.
• a high speed pendu ⁇ lum conveyor that feeds out a light web and has a high pendulum frequency yields an inexact laying of the primary web.
• a pendulum conveyor driven in a known manner by a connecting rod and oscil ⁇ lating along a circular arc imparts a speed to the output end of the conveyor that is maximal when the pendulum is in the central position and decreases sinusoidally to zero in the extreme posi ⁇ tion, from where a sinusoidal acceleration reoccurs.
• the output end of such a pendulum conveyor must, in its lowest position, be disposed c. 0,2 times the output width, which normally is 2 , above the fed out wool web, in order to allow the primary web to be deposited in an uniform layer on the receiving conveyor withou being stretched.
• the distance between the pendulum and the receiv ing conveyor being that long up to 40 cm and more, the fed out web will get uneven edges.
• the output rate being c.
• the irregularities of the secondary web formed will be c. +/- 5% of the output width. This signifies that the secondary web must b imparted a correspondingly larger width in order to achieve a faultless web of the desired width, since the undesired material has to be cut off. This means a great loss of material .
• Pendulum output mechanisms in which the folding process is car ⁇ ried out by continuously feeding out the primary web at a constan height above the support, at a constant height, are also known.
• a articulation system for maintaining the output end of the pendul mechanism at a constant height above the receiving conveyor is provided, and the to and fro motion is obtained by a chain/con ⁇ necting rod-mechanism.
• the speed profile of the oscillating moti has a constant speed period in the middle and a sinoidal retarda tion and acceleration phase in each end position.
• the pendulum must be rapidly retarded and accelerated in the end positions fo the pendulum motion to correspond to the output amount of the primary web per unit of time, causing great strains in the mecha ical constructions. Consequently, the mechanism is appropriate only at output rates below c. 100 m/min.
• Another drawback of pendulum mechanisms aving a high pendulum frequency is constituted of the strong flows of air generated by the rapid back and fro motion of a pendulum mechanism having large surface. The air flows hamper the depositing of the thin primary web onto the bed.
• the purpose of the present invention is to reduce or totally eliminate these drawbacks, and especially to obtain an exact out laying with even edges and a web with high homogeneity, and this has been achieved by providing a method and a device, of which t main characteristics are presented in claims 1 and 9.
• a prior known drive system is used, imparting to the oscillating pendulum conveyor, called pendulum from now on, a constant rate of motion in the middle of the pendulum motion and a sinusoidally decreasing respectively increasing speed in the extreme positions of the pendulum motion.
• the period having constant speed may be in the range of 30 to 60% of the entire pendulum swing.
• the constant speed of the pendulum in the central area equals totally or nearly totally the output rate of the primary web. This enab ⁇ les the pendulum to be disposed closer to the receiving surface, at about half of the distance allowed by conventional crank drive thus ensuring considerably better the deposit and the fixation of the primary web on the receiving conveyor.
• the pendulum In areas outside the phase having a constant speed the pendulum is driven at a sinusoidal ly decreasing respectively increasing ra te, while the pendulum pursues its pendulum motion. At least during part of the motion at a decreasing respectively increa ⁇ sing rate in the extreme positions of the pendulum swing, the output end of the pendulum is arranged to rise in the final phase of the pendulum motion and to sink in the initial phase. Due to the changing of the height of the pendulum in the retardation re spectively the acceleration phase, potential energy is stocked respectively discharged, resulting in less stress forces on the mechanism than those generated when the output end of the pendulu describes a horizontal path over the entire pendulum swing.
• the pendulum motion consisting of a central portion having a constant speed and two extreme portions having retarding and ac ⁇ celerating speeds, is appropriately produced by means of an end ⁇ less drive chain running over two coplanar interspaced chain wheels, whereby a connecting rod connects the pendulum with a carrier on the drive chain.
• the centre distance of the chain wheels corresponds to the portion of the pendulum motion having a constant speed and half the circumference of each wheel corres ⁇ ponds to the pendulum motion having retarding and accelerating speed.
• the pendulum motion consisting of a central portion having constant speed and two extreme portions having retarding and accelerating speed may also be produced by means of a so- called Ferguson gear, in which the rotary motion is transmitted by elliptical gear wheels.
• the output end of the pondulum may be guided to move along diffe rently shaped paths in the course of the pendulum motion.
• the mo simple embodiment is an arched trajectory, whereby the pendulum swings around a stationary point of bearing.
• the pendulum operates with great accuracy at output rates c. 200 m/min. This is allowed by the fact that the output end of the pendulum may strike very close to the receiving conveyor, an closest thereto at the midpoint of the total swing, whereby the fed out primary web may be immediately fixed into the underlying fed out wool web and thus remains undisturbed by the air flows caused by the pendulum motion. In the extreme positions of the pendulum motion the lower end of the pendulum rises c.
• the pendulum may be relatively short, c. 0.7 to 1.0 times the output width, i.e. c. 140 to 200 cm, which results in lower mass-moments of inertia and smaller stresses in the driving device.
• the air flow disturbances are also reduced b a shorter pendulum.
• the pendulum may be adjusted to strike at its closest point only 5 to 10 cm above the receiving conveyor and thus to fix almost immediately the fed out web into the central area of the trajectory. This results in a wool web havin very even edges.
• the pendulum rises c. 12%, i.e. 24 cm, in the extreme positions.
• Another preferred embodiment of the invention is the one in which the pendulum and its output end are made to move horizontally at a constant height above the receiving conveyor in the central zo ⁇ ne of the pendulum swing and to rise above this in the outmost positions.
• the rising motion may be started at any point after the mid point of the pendulum motion, but at the latest during the retardation phase of the pendulum motion, thus allowing for the primary web, which is fed out from the output end of the pendulum at a constan rate, enough space below the output end which then moves at a low er rate than the output rate of the primary web.
• the rising mo ⁇ tion thus starts at the earliest immediately after the mid point of the pendulum motion, the pendulum and its output end then describing a continuous arched line, or at the latest at such a point before the extreme position of the pendulum swing, that enough space is allowed to be formed below the rising pendulum fo the accumulating loop to settle under control and to form an even edge during the reverse motion.
• the path described by the output end may be a linearly rising, circular, progressively arched line or various combinations of these .
• the pendulum or its output end is forced to deviate from the natural pendulum motion having a circular output path. From the moment there is a deviation from the natural pendulum motion, the oscillating point of the pendulu must be vertically movable or the swinging radius of the output end be variable.
• an arm mounted bearings in the pendulum may for instance comprise a lower end that is pivotally mounted on bearings outside the pendulum, thus forcing the pendulum to describe an essentially horizontal path.
• the oscillating point of the pen ⁇ dulum sinks/rises.
• the oscillating point has been disposed so as to reach a stop or else stop in the position in which the pen dulum is to pass into a rising motion in the outmost zone of the pendulum swing respectively sinking motion in the same zone duri the reverse motion.
• the mounting of the arm on bearings in the pendulum is disposed so as to enable the pendulum to oscillate with regard to the arm at this stage, e.g. be means of fork bear ings.
• a spring may appropriately be disposed between the connec ⁇ ting rod top of the pendulum and the arm guiding the height posi tion of the pendulum, whereby the acceleration and retardation forces are partly equilibrated in the extreme positions of the pendul urn.
• the motion of the pendulum may also be guided by for instance a fixed guide disposed symmetrically with regard to the central axis along which a wheel mounted on bearings in the pendulum or sliding body are disposed to move.
• the trajectory of the output end will then correspond to the shape of the guide.
• the height o the guide above the ouptut end is determined by the optimization of geometry and mass forces.
• the oscillating point of the pendulum may alternatively be sta ⁇ tionary while the output end is radially movable in relation to the oscillating point.
• figure 1 presents a schematical representation of the pendulum motion of two preferred embodiments; the motion of the pendulum at a constant speed and subsequently at a retarded and an accele ⁇ rated speed, while the output end of the pendulum describes a cir cular path (case A) respectively the motion of the pendulum at a constant speed and subsequently at a retarded and an accelerated speed while the output end during the constant speed phase moves at a constant height above the receiving conveyor and during the retardation respectively acceleration phase moves along an arched path (case B) ,
• figure 2 shows a preferred embodiment of the pendulum including the associated driving devi.ce and the pendulum shown in three different positions, and
• figure 3 shows another preferred embodiment of the pendulum in ⁇ cluding the associated driving device and showing the pendulum in three different positions.
• the right side of the figure shows the case (A), in which the pendulum both during the period at a constant speed and the period at a retarded and an accelerated speed oscillates around the point P, which is stationary in this case, and the output end describes a circular arc.
• the pendulum is driven by the guide device D by means of a chain having constant speed.
• a connecting rod V is mounted on bearings on a carrier to the drive chain at the point T and to the pendulum mechanism at the point K .
• the points 1 to 12 have been mark-
• a dulum with regard to the drive device D more or less geometrica assymmetry is achieved, i.e. the points 3 and 5 respectively 2 a 6 deviate somewhat from each other, which appears from the rough drawing.
• the pendulum rises in the extreme position 4 c. 24 cm, which also appears from the figure drawn in the scale 1:10, and forms a controlled loop of the primary web at the turning point. Owing to the smaller distance of the output end to the receiving conveyor S and the synchronization between the output rate and the oscillating rate of the output end, the fed out primary web rapidly fixed to the bed, which also appears from the rough draw ing.
• the motion of the pendulum from the point 7 to 1 is the re ⁇ verse image of the motion between the points 1 and 7, however no represented.
• the left side of figure 1 shows the case (B) in which the output end of the pendulum during, the period of constant speed moves at constant height above the receiving conveyor S and during the
• Figures 2 and 3 show the pendulum part of a machine for producing mineral wool web and the associated drive mechanism.
• the recei ⁇ ving conveyor of the primary web is marked with 1, the associated pendulum conveyor with 2, the two opposite conveyors with 2a and 2b and the conducting rollers in the output end with 3a and 3b.
• the receiving conveyor has been marked with -4, the drive mechanis with 5, the two wheels of the drive mechanism with 5a and 5b and the connecting rod with 6.
• the parts 1 to 6 correspond mutually in the figures 2 and 3 and have thus been marked with the same numbers.
• the wheel that conducts the pendulum motion in a guide device has been marked with 7 and the axis of the wheel fi ⁇ xed on the pendulum conveyor with 7a.
• the guide along which the wheel 7 has been arranged to run and which determines the tra ⁇ jectory of the output end has been marked with 9.
• the output end of the pendulum conveyor has been marked with 10.
• the primary web When producing a mineral wool web, the primary web is fed out on its receiving conveyor 1 and runs further between the conveyors 2a and 2b into the pendulum mechanism 2, and is fed out at the output end 10.
• the pendulum swings to and fro while the primary web is being fed out between the conducting rollers 3a and 3b.
• the wheel 7 gains a constant rate of motion and simultaneously moves over the plane portion of the guide 9, whe ⁇ reby the conducting rolls 3a and 3b cover the distance B at a constant height above the receiving conveyor.
• the connecting rod moves along the circumference of the drive wheels, equalling the distances b , the wheel 7 moves over the upwards bended end
• the guide 9 is determined by the desired kinetic geometry.
• the oscillating point 22 of the pendulum is displacable along the li of the central pendulum motion and the receiving conveyor 1 of t primary web is mounted on bearings by articulation in order to b able to vertically follow the motion of the input end of the pendul urn.
• Figure 3 shows another preferred embodiment of the pendulum of t invention.
• the lower end of ⁇ an arm 20 is fixed on -bearings outsi de the pendulum on the central line of the oscillating motion, a its upper end is mounted on fork-bearings to the bearing point 8 of the connecting rod 6 on the pendulum.
• the bearing point 8 is disposed to run in the fork 21 at the upper end of the arm.
• the oscillating point 22 of the pendulum is vertically displacable along the central line of the motion and the receiving conveyor of the primary web is mounted on bearings by articulation in or ⁇ der to be able to follow the movements of the pendulum verticall likewise as in the preceding case.
• the pendulum As the connecting rod moves over the horizontal area between the drive wheels the pendulum i drawn into an angular position while the oscillating point moves downwards until its reaches a stop 23 at the end of the constant speed period.
• the stop prevents the oscillating point from being further dispaced downwards and the pendulum is forced to swing around the oscillating point P fixed by now.
• the fastening point 8 is displaced upwards in the fork 21 and thus does not prevent the pendulum from rising along an arched line.
• the pendulum swings down and the output end 10 descri ⁇ bes the same arched line, while the fastening point 8 simulta ⁇ neously is displaced towards the bottom of the fork 21. The same motion is repeated in the opposite direction.
• inventions of figures 2 and 3 each show a pendulum motion composed so that the horizontal or essentially horizontal output motion coincides with the phase having a constant speed and the rising respectively sinking motion coincides with the phase havin retarded respectively accelerated speed.
• the controlled trajector of the output end, deviating from the arched trajectory may of course be adjusted to start at any point during the period of constant speed b or the period of retarding or accelerating motion b . 2
• the retardation and acceleration forces are less than in prior used methods, partly due to the rising motion at the sides of the output and partly due to a smaller pendulum ha ⁇ ving less mass.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Treatment Of Fiber Materials (AREA)
• Advancing Webs (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Jigging Conveyors (AREA)
• Paper (AREA)
• Structure Of Belt Conveyors (AREA)
• Reinforced Plastic Materials (AREA)

Priority Applications (8)

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Publications (1)

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ID=8523427

Family Applications (1)

Country Status (13)

Cited By (8)

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Citations (2)

Family Cites Families (1)

• 1986
  • 1986-10-31 FI FI864452A patent/FI83674C/fi not_active IP Right Cessation
• 1987
  • 1987-10-28 CN CN87107553A patent/CN1009911B/zh not_active Expired
  • 1987-10-29 PL PL1987268494A patent/PL158611B1/pl unknown
  • 1987-10-29 JP JP62506643A patent/JPH02500737A/ja active Pending
  • 1987-10-29 AU AU81745/87A patent/AU607169B2/en not_active Ceased
  • 1987-10-29 HU HU875772A patent/HUT49826A/hu unknown
  • 1987-10-29 KR KR1019880700767A patent/KR890700106A/ko not_active Application Discontinuation
  • 1987-10-29 WO PCT/FI1987/000143 patent/WO1988003121A1/en active IP Right Grant
  • 1987-10-29 RO RO139506A patent/RO104627B1/ro unknown
  • 1987-10-29 EP EP87907241A patent/EP0329686B1/en not_active Expired - Lifetime
  • 1987-10-30 CA CA000550646A patent/CA1289981C/en not_active Expired - Fee Related
• 1989
  • 1989-04-26 BG BG088260A patent/BG50603A3/xx unknown
  • 1989-04-28 RU SU894614045A patent/RU1831533C/ru active

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