DE2328840A1 - METHOD FOR MANUFACTURING EMBOSSED ACOUSTIC PANELS AND DEVICE FOR CARRYING OUT THIS METHOD - Google Patents

Description

PATENT LAWYERS Dipi.-ing. H. Seiler Dipi.-ing. J. Pfenning Dipi.-Phys. K. H. Meinig

59 / 1-7-B 1 Berlin 19 ^!

Oldenburgallee 10 Tel. 0311/304 55 21 i

304 55 22 i

Wireword: rope defense patent

Postal check. Bln.W.5938;

^Λ . June 1973!

Ka "!

JO ¹ HiS-M \ nviLT,: ·; corporation

21 Kfir.t'K) th Strp.?t, New York, "T. /. · Ϊ́00'ϊ6, USA

Process for the production of embossed acoustic panels and device for Perform this procedure

The invention relates to a method for producing embossed acoustic panels (sound absorbing panels) from individual cut workpieces, with indentations being provided in the plates in addition to the embossing.

More and more recently there is a transition to applying different patterns to acoustic panels, so that the panels no longer show the flat appearance without patterning that was customary in the past. A typical, previously known process for embossing of acoustic, plate-shaped workpieces and for making recesses for the sound absorption process essentially consists from two separate process stages. A big section plate-shaped material is, before it is cut into individual plates, through large press rolls.

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ί directs where one and the same pattern is repeatedly applied to the a surface of the large portion is embossed. The whole roll is usually heated during the pressing process. After this

j the panel section has been cut into individual partial panels

is, these plate parts are in a separate process perforated with indentations. The piercing process is usually carried out by means of a piercing press, which is a

Number of perforated pins.

This procedure will be the main

ι panels obtained with good acoustic properties; kick it however, it has various disadvantages. For example, large rollers are used for embossing patterns in the Plate sections require a considerable amount of space that would otherwise be available. Also require the large rollers have a considerable heat requirement. Another disadvantage is the time-consuming and costly work which is necessary in order to work the special pattern on the rollers that is to be embossed into the plates. Therefore It has become common in individual cases to use an old roller to apply a new pattern by using the removed old patterns from the roller and replaced them with a new one. This saved time and money, on the other hand but excluded the possibility of using the old pattern again: use; rather, it was necessary to revisit an old pattern on the roller.

Another disadvantage of the previously known embossing

, driving consists in the impossibility of accurately arranging the repetitive patterns on the plate section, and

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in such a way that the pattern is in the center of the individual plate after the plate section has been cut into individual plates has been. So it could be found again and again that the individual patterns on the plates with regard to the edge parts had a different position.

The invention is based on the object of providing a sound-absorbing, plate with embossing and sound-absorbing indentations, in which on one side in the embossing and depressions can be produced in a single economical operation, whereby it must be ensured that that the embossing pattern occupies a central position on each plate.

Accordingly, the invention resides in a method of embossing acoustic panels from individual, previously cut Work pieces. The method according to the invention is characterized in that the cut, plate-shaped workpieces be gradually conveyed into a treatment zone in which both punching and embossing are combined is made by means of perforated elements and a stamping plate. Here, hole elements are used on one side of the workpiece a number of sound-absorbing openings pressed into it. Embossing a pattern is done on the same side of the Workpiece carried out simultaneously with the punching process. Finally, the embossing plate is heated at least during the pressing process.

The invention also consists of a device for the deformation of acoustic panels in the embossing process from panel-shaped Work pieces and is characterized by a support

device for receiving a number of plate-shaped workpieces 'in a zone. Furthermore, the system according to the invention has a : second support device above the first mentioned, which consists of a perforated plate, the one provided with embossing Surface has. This plate is between the two carrying devices provided and attached to the top. A plurality of relatively long hole elements are each with one

i
End attached to the second support device and extend

towards the support plate. The hole elements are each aligned with a hole in the die. Furthermore, the invention consists of a device for movement at least one of the two support devices in the direction of the

! others as well as away from her, the embossing surface of the embossing plate penetrates into the plate-shaped workpiece, which is in

ίis located in the named zone. This creates a pattern in the Workpiece embossed, with the free ends of the perforation elements passing through the holes in the embossing plate almost at the same time.

j penetrate and / aas plate-shaped workpiece depressions press once the two support means are moved toward each other \.

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The drawing shows the invention in one embodiment. It shows:

Fig.l is a schematic view of a system for molding embossed, acoustic, plate-shaped fittings according to the present invention,

Fig.2 is a front view of part of the plant according to Fig.l, which shows in particular the combined stamping and punching of a device according to the invention,

FIG. 3 shows a representation corresponding to FIG. 2 during aes embossing and punching process.

The present invention relates to a new, advantageous method for the simultaneous embossing and punching of cut, plate-shaped workpieces to obtain acoustic panels that have an embossed pattern and a number of sound-absorbing elements Have depressions. For this purpose, a device is used that is used for combined embossing and punching, and which is arranged above a deformation zone and performs reciprocating movements in the direction of this zone. The reciprocating movement of this device becomes synchronous with the stepwise movement of the plate-shaped workpieces provided in the direction of the deformation zone, the device acts on the workpiece each time it is in the lowest position of the oscillating movement.

In order to ensure that the cut, plate-shaped workpieces are embossed when they enter the deformation zone have reached, the oscillating device has an embossing plate, which by means of springs at a suitable distance from a support plate is arranged. In addition, the facility

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device on a plurality of pierced pins, which are also attached to the support plate, and which extend in the direction of the deformation zone between the embossing plate on the one hand and the Tragi plate on the other hand. If the establishment is at your

¹ oscillating movement approaches the lowest position, the embossing plate engages in the side of the plate-shaped workpiece facing it, which is located in the deformation zone and is thereby moved upwards against the support plate. This upward movement causes the perforated pins to enter the aligned openings which are provided in the embossing plate. When the combined device has reached the lower point of the oscillating movement, the perforated pins j have moved completely through the openings and have penetrated the plate-shaped workpiece in such a way that depressions for sound absorption are created. At the same time, the embossing plate exerts a pressure against the side of the plate-shaped workpiece provided with depressions j and thus impresses a pattern. The embossing plate is preferably heated to a certain temperature in order to facilitate the embossing process. It can be seen from the foregoing that the embossing plate is used instead of the typical rollers that have been customary up to now, which are used to emboss the plate-shaped workpieces. The embossing plate is preferably the same size and shape as the cut,

plate-shaped workpiece. This has the advantage that the plate can be heated more economically, for example by the electric current. It is also an advantage to be in an economic Replace the existing plate with another one with a different embossing pattern with less expenditure of time

can, which is not easy when using aer customary embossing rollers is possible.

The use of the aforementioned embossing rollers allows the embossing of a large, not cut, plate-shaped section in a faster operation than this
of the present invention is the case by individually embossing previously cut, plate-shaped workpieces. It has been shown, however, that the embossing of a larger number of embossing patterns on a larger, not cut, plate-shaped workpiece leads to a poor arrangement of the individual patterns. For example, the arrangement of an embossed flower
Required in the middle of each individual plate-shaped workpiece, this arrangement is difficult to achieve when using rollers as an embossing tool. In contrast, the present invention makes it possible to achieve the central arrangement of such a pattern in a more precise and simple manner. if
Even according to the present invention, embossing cannot be carried out as quickly as when using embossing rollers
was possible, the present invention has the advantage that
simultaneous perforation and embossing of the workpieces is possible
is. In this way, the loss of time is compensated in multiple ways and a faster production is achieved than with a single embossing of previously cut workpieces. In the end result, advantages are therefore achieved by the invention,
without wasting valuable time.

Both the aforementioned features of the invention as
further characteristics are also explained on the basis of the detailed historical description. Same parts as described

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Devices are provided with the same reference numbers in the various figures. With reference to Fig.l it should be mentioned ^; that in it a system 10 is shown, which essentially I for the simultaneous punching and embossing cut, plat-

! ten-shaped workpieces 12, which are made of wood fibers, mineral wool

• Ie or another suitable, sound-absorbing or sound-absorbing building material. The plant comprises a combination tion ¹ of the embossing and perforation means of a device IU. j The device is in accordance with the present invention ^! is constructed and is located above a fixed

! the platform 16. As described in detail below,

[which should be, a device IU is swinging in the vertical direction

! device moved by means of a drive 17. This device 14 is arranged at such a distance above the platform 16 that it then approaches the platform 16 particularly closely, when it has reached its lowest position during the swinging movement. As shown in FIG. 1, the platform 16 a horizontally extending and upwardly directed support surface 16, part of which is immediately below the device 14 is located. This part is with the reference number 20 has been provided in the drawing and will be referred to below as a deformation section or deformation zone. Due to the oscillating movement, one side of the plate-shaped workpiece 12 is shaped by the device is in each case in the deformation zone 20; It is punched in many places on the embossing side at the same time.

The system also has a device 22 for receiving cut, plate-shaped workpieces 12 and a

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Facility for the gradual advancement of the same. As a result, the workpieces are pushed into the deformation zone 20 in such a way that that the side of the workpieces to be embossed and punched faces the embossing and punching device 14 when the Workpiece has reached zone 20. As shown, the device 22 has a vertically arranged container 24, the is too open towards both opposite ends, and which is located directly above the surface 18 of the deformation zone 20 connects. The container 24 has essentially the same cross section as the plate-shaped workpieces 12, but is slightly larger than the workpieces. The container is used to hold a number of plate-shaped workpieces in a vertical stacking arrangement. The lower open end of the container 2 4 is opposite the surface 18 at a distance that is slightly is greater than the thickness of the plate-shaped workpieces, but on the other hand somewhat smaller than the thickness of two superimposed workpieces Work pieces is. This ensures that the lowest plate in the vertical stack of plates passes directly through the platform 16 and is thus located below and outside of the container 24. With that there is this special one plate-shaped workpiece in the position in which it can be moved into zone 20.

A stepping device 26 represents part of the device 22 and has a plunger 28 which is arranged on the outwardly protruding end of an oscillating drive 30 and can thus impart a reciprocating, horizontal movement to the plunger. This drive has, for example, a piston and a cylinder. As shown in Fig.l,

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: the stepping device is horizontal and on that side of the container 24, which lies opposite the deformation zone 20 opposite-I. The device is not in one of the drawings attached manner shown in more detail.

: The plunger 28 is in its retracted position

j Position on one face of the lowest lying workpiece 12, which is located directly below the container 24. After switching on the device 30, the electrical, pneumatic I or can be driven hydraulically, the plunger 28

from its retracted position to its extended position

! ment moves so that the plunger is at a sufficient distance below

of the container 24 and gradually moves the lowermost workpiece into the zone 20. The plunger 28 is then moved back into its initial position via the oscillating drive 30, with another workpiece falling under the action of gravity onto the surface 18 directly below the container.

The mode of operation of the device is described in more detail below. First there are cut, plate-shaped Workpieces 12 are filled into the container 24. This can

either by hand or by means of a conveyor belt 34. For this purpose, guide rails (not shown) can be used, for example, in order to ensure a precise vertical staggering of the workpieces within the container 24. The lowermost workpiece is moved into the deformation zone 20 in the sense of a step switch by a step switch device 26 of the device 14, in which the workpiece is punched and embossed , as will be described in detail below . Then a second workpiece is loaded into zone 20

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moves away and here the previous workpiece on a second Conveyor belt 36 pushed, from which it can be removed for further processing or for packaging. A liquid, such as water, can be added to the plates before they have reached the deformation zone in order to facilitate punching and embossing in this way.

The process described above is repeated uninterruptedly, so that the workpieces one after the other into the deformation zone 20 arrive, from which they are pushed onto the conveyor belt 36 after stamping and punching. To this end, will the movement of the device 14 for the combined punching and embossing is synchronized with that of the indexing device 26, in such a way that a new workpiece 'step-by-step into the deformation zone 20 after each lifting movement of the device 14 arrives. The synchronization can take place by means known per se and is therefore only shown in the drawing indicated by a dashed line 38. In addition, however, what is not indicated in the drawing, the feed conveyor belt 3 4 with the stepping device and the device IU will be synchronized to an overfill in this way of the container 24 with workpieces to avoid. The establishment and the ram 28 are driven so that they perform, for example, 90 strokes per minute. This achieves that through the system can punch and stamp 90 workpieces per minute.

Reference is now made to FIG. 2, which relates to the combined embossing and punching by means of the device 14 relates. This device has a plunger 40 arranged vertically

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and a horizontally extending support plate 4 2, which is attached to the lower free end of the punch 40. According to the present invention, the device 14 also has an 'embossing plate 44, which is also horizontally arranged directly below I and at a certain distance from the support plate 42 ^: net. In this position, the embossing plate 44 is fastened to the support plate 42 by a plurality of vertically extending springs 45 which are provided on opposite sides of the support plate 42 on the one hand and on the embossing plate 44 on the other. the

The die 44 is preferably approximately the same size

: and shape like the cut, plate-shaped workpieces 12 and has various protruding embossments 48 on its lower surface representing the desired pattern shown in FIG ! the workpiece is to be embossed.

. The device 14 also has a number vertical

directed, at a certain distance from each other arranged perforated pins 15, with their upper ends at the bottom of the

I attached to the support plate 42 and facing the embossing plate 44.

; The embossing plate 44 has vertically extending in the same arrangement Holes 52 which completely penetrate the plate. Each

: Hole 52 is in the vertical direction with the associated pin 50 aligned and dimensioned so that the hole pins 50 move freely in these holes 5 2 when the support plate 42 moves downward can. If the device 14 reaches its lowest oscillating position during the working process, the embossing plate engages 44 into the surface of the workpiece 12, which is located in the zone 20. This causes the die 44 to be the

j to approach support plate 42 so that the compression springs 4 6 together ^ e-

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be pressed. By this movement of the die 44 are the Cuts piercing pins 50 into holes 52. As soon as the pressing device has reached its lowest oscillation phase, As FIG. 3 shows, the embossing plate 44 is pressed sufficiently against the support plate 42 so that the free ends are caß of the perforated pins 50 have moved completely through the openings 5 2 and their tips have penetrated the workpiece are. The hole pins 50 are dimensioned so that they have formed sufficiently deep and wide openings in the workpiece, whereby the sound absorption of the acoustic panel, which is specially designed for extensive sound insulation, is increased.

While the pins 50 penetrate into the plate-shaped workpiece 12, the stamping plate 44 is simultaneously against the perforated The surface of the workpiece is pressed so that the special pattern is imprinted by the protruding parts 48 is marked on the surface of the embossing plate. After a short period of contact, maintained by the device 17 the device 14 is moved upwards and leaves the deformation zone 20. At this time the compression springs expand 46 and push the die 44 back into its starting position. The perforated and embossed plate is thereby moved away from the perforated pins 50.

The embossing plate is preferably heated to a temperature, for example, 700 ⁰ F is, thereby facilitating the coining process. The heating is preferably done electrically. The embossing plate is made from an electrically heated ί
! Material, for example made of nickel, and carries a heating element, which is provided with the reference number 56 in the drawing

is. As shown, the heating element 56 is connected to one side of the embossing plate via a line 5 8 and on the opposite side anchored in a suitable manner, not shown. The embossing plate is electrically and thermally from the

! Support plate 42 insulated.

From what has been described so far it can be seen that the plat- : ten-shaped workpieces are gradually moved into zone 20, wherein the embossing plate can easily be brought into a position opposite the workpiece, which has a central arrangement of the

'' guarantees the pattern to be embossed in the workpiece. Furthermore it is it is important that the embossing plate takes into account its

ring size in relation to the known embossing rollers economically are heated and can also be replaced in a simple manner by another plate having a different pattern ι can.

Claims (1)

Claims 1. Process for the production of embossed acoustic panels (sound absorbing panels) from individually cut workpieces, characterized in that the cut, plate-shaped Workpieces are gradually fed into a zone in which they are simultaneously subjected to perforation and embossing in such a way that that one side of the surface is provided with a plurality of sound-absorbing openings and an embossed pattern at the same time, wherein the embossing plate is heated at least during the pressing process. 2. The method according to claim 1, characterized in that the material is a liquid before the stamping and punching process is fed to at least that side of the surface that is subjected to the embossing and perforation. 3 »Method according to claim 1 or 2, characterized in that each workpiece under the device for punching and embossing is ejected after the punching and embossing process is finished. 4. The method according to any one of claims 1 to 3, characterized in that the phase of perforation and embossing with the phase the step-by-step feeding of the workpiece into the machining zone is synchronized. 5. Device for performing ües method according to one of claims 1 to 4, characterized by a first Trageinricritung (16) for detecting a plurality of plate-shaped 3O9bbO / OBA 3 Workpieces (12) and one above the first support device (16) arranged second support device (42), also marked by an embossing plate (44) provided with holes (52), j which is equipped with an embossing surface, and the between ! the first support device (16) and the second support device ; (42) is arranged and attached to it, further identified by a number of perforation elements (50), each of which ! respective ends arranged on the support device (42), directed towards the plate (44) and opposite one plate hole (52) S are arranged and finally characterized by a direction of movement of at least one of the support devices i
'(16,42) in the direction of the other towards or away from her. ! 6. The device according to claim 5, characterized by a heating device for heating the embossing plate (44) to a loading j correct temperature. j 7. Apparatus according to claim 5 or 6, characterized by a resilient, pressure-dependent, in particular resilient ! Connection between the support plate (42) on the one hand and the embossing plate (44) on the other hand. 8. The device according to claim 7, characterized in that the connection of several, preferably at the edges | of the plates (42, 44) provided compression springs, in particular helical compression springs (46) or the like. consists. 9 _t device according to one of claims 5 to 8, marked I.
characterized by a step switching device for the automatic, successive step movement of a plurality of plate-shaped workpieces from the delivery to the punching and embossing zone. 309bbÜ / ü543 10. Device according to one of claims S to 9, characterized A vibratory drive for the movement of the punching and embossing device. 11. Device according to one of claims 5 to 10, characterized by a synchronization device for synchronization the movements of the vibratory drive with the drive for the stepping device. 12. Acoustic panel, produced by the method according to any one of claims 1 to 4, characterized in that as Raw material for the plate-shaped workpieces wood fiber, mineral wool or another sound-absorbing or sound-absorbing material is used. 309850 / UbAJ Blank page