FR2515575A1 - APPARATUS FOR PERFORMING CORRUGATIONS OR GROOVES - Google Patents

Abstract

APPARATUS FOR CONTINUOUSLY CARRYING OUT CORRUGATIONS OR GROOVES ON A ROLL MATERIAL SUCH AS A PLASTIC SHEET, A PAPER SHEET OR A METAL SHEET, FOLLOWING THE LONGITUDINAL DIRECTION OF THE ROLL MATERIAL. THE APPARATUS INCLUDES A PAIR OF ROLLERS 7 COOPERATING FOR REALIZING THE CORRUGATIONS, ROLLERS THAT ARE PROVIDED WITH MEANS INTENDED TO MAKE A PROFILE AND PROVIDED PARALLELY, THESE MEANS EXTENDING AROUND THE PERIPHERY OF ROLLERS AND CONSISTING OF RINGS 14 WHICH ARE LATERALLY BUT THAT ARE FREE TO TURN AROUND THE ROLLERS 7 IN ORDER TO REDUCE THE CONSTRAINTS ON THE MATERIAL AND TO INCREASE THE QUALITY OF THE FINISHED PRODUCT.

Description

251557;

  Device To make corrugations or grooves.

  The invention relates to the production of

  dulations or grooves on a roll material and

  more particularly to an apparatus for performing in con-

  continuous ripples or grooves on materials such

  than a plastic sheet or a metal sheet-

  roll, device according to which the ripples or

  splines are made in the longitudinal direction

  nale of the material in roll and, thus, also according to

  the direction of advance of the roll material.

  When making ripples or cane-

  lures on cardboard or paper to make corrugated cardboard or when making corrugations or grooves on thin sheets for various purposes, the corrugations or grooves are generally made at an angle, usually 900, by in relation to the longitudinal or feed direction of the material and with regard to the continuous production of corrugations or grooves on a roll material, it has only been carried out in the manner described The production

  undulations at a right angle to the di-

  rection in advance of the roll material was quite

  satisfactory in most cases, especially for the manufacture of corrugated cardboard, and

  relatively simple work since the change of dimension

  sions of the material due to the corrugations only has the effect, in this case, of shortening the corrugated material somewhat compared to the initial material When it is desired to manufacture sheets consisting of several layers of corrugated material, for example for using them as an insulating material or as a material for certain types of heat exchangers: in many cases, however, it is not appropriate to use a material

  roll which is only corrugated at right angles to

  bearing in the longitudinal direction, since in such cases it is preferable that the undulations of the adjacent sheets extend at an angle of 900 usually with respect to each other and, thus, the successive layers should be placed in such a way that they cross each other Therefore, the dimensions of the finished sheets are limited by the width of the strip materials and this is particularly troublesome with regard to window insulations where one does not wish to have a joint or for the insulations for walls or walls that are not flat and or the sheets

  must be curved to follow the wall surfaces.

  Sheets of the type mentioned above were also produced by manufacturing the various

  layers of the sheets one by one So the sheets pre-

  cut or similar elements) were placed on a table provided with ribs and a roller provided with grooves

  was used to make the waves

  standing on the leaves Then the leaves

  were arranged on top of each other and were -

  bonded or welded together Such a method does not allow continuous production of such sheets, and therefore requires a lot of time and is not effective, and it follows that it is not satisfactory in terms financial.

  Finally, efforts have been made to

  read ripples or grooves on a material

  in a roll in such a way that the corrugations spread

  tend at an angle other than 900 and usual-

  at an angle of 450 to the direction

  roll material in advance During production

  tion of sheets of the kind described above, which consist of two or more of two corrugated layers, the corrugations of adjacent layers forming an angle with respect to each other, it is possible either to produce the corrugations of each layer according to the same angle to the direction of feed of the rolled material, after which every other layer is

  turned upside down so that the on-

  dulations of successive layers form an angle with each other, that is to realize from the start the undulations at different angles on the adjacent layers in such a way that the undulations of

  these layers form an angle between them from the start.

  A disadvantage of this way of operating resides in the fact that for each layer, it is necessary to use an apparatus for producing the corrugations at an angle relative to the direction of advance of the rolled material and the fact that such a device is relatively complicated and costly compared to conventional rollers to produce the corrugations, the investment costs

  will be high in comparison In addition, it is very diffi-

  to obtain satisfactory formation of corrugations by means of such an apparatus and this is partly due to the fact that the rolled material tends to deviate from the intended path or to deform In order to be able to produce corrugations of a satisfactory quality, it is necessary to work with extreme precision during the manufacture and adjustment of such devices, which

makes them even more expensive.

  The object of the present invention is to provide

  an efficient and relatively inexpensive device for

  continuously read ripples on a rolling material

  water following the direction of advance of the material in roll

  water, device with which the disadvantages mention-

  born above can be overcome.

  According to the invention, an apparatus for continuously producing corrugations on a roll material, such as a sheet of plastic material, paper or

  of metal, in the longitudinal direction of the material

  tière, by means of a pair of rollers which cooperate to produce the corrugations, is characterized in that the rollers for producing the corrugations are

  provided with means for producing a profile, arranged parallel

  which extend around the periphery of the roads

  leaux and by the fact that these means to achieve a pro-

  wire consist of rings which are laterally wound

  and which are free to rotate on the rollers.

  Advantageously, the rings are slidably mounted in grooves provided on the rollers, and the rings and / or the grooves are provided with a plastic coating, reducing the friction known under the

trade term "Teflon".

  The invention consists, apart from the arrangements

  tions set out above, in certain other provisions which will be more explicitly discussed below in connection with a particular embodiment described in detail with

  reference to the attached drawings, but which is not null-

limitative.

  Figure 1 of these drawings is a schematic side view of an apparatus according to the invention inserted in an installation for the manufacture of insulating sheets composed of three layers, only parts of the production line being shown; Figure 2 is a view, in the direction of advance, of the apparatus according to the invention; Figure 3 is a cross section along line 3-3 in Figure 2; Figure 4, finally, schematically illustrates an enlarged part of the apparatus according to Figure 3, along a cross section along the line 4-4 Figure 3. As it is clear from Figure 1, the invention described and illustrated relates to an apparatus inserted into a production line for producing insulating sheets composed of three layers, but it is obvious that the invention is not in any way limited to use in such an environment and that the apparatus conforms to the invention. The invention can be used as is or in combination with other manufacturing facilities. According to FIG. 1, the device 1, in accordance with the invention, for producing corrugations is inserted into an installation for the production of insulating sheets in three layers, installation in which

  upper, middle and lower feed rollers

  2, 3 and 4 respectively for the three layers of roll material are provided on a frame 5 From the upper and lower feed rollers 2 and 4 respectively, the roll material is guided, on guide rollers 2 1 , 2 2, 2 3, 2 4 and 4 1, 4 2,

  4.3.4 4 respectively which are mounted in a semi-

  connectable to the frame, and on guide rollers 2 5, 2.6, and 4 5, 4 6 respectively which are mounted on a

  second frame 6, in direction-of pairs of class rollers-

  sics to achieve corrugations 2 7, 2 8 and 4 7, 4 8 respectively which, in a similar manner are mounted on the frame 6: these rollers are provided with nmur means to produce a profile which extend in the longitudinal direction of the rolls, to make undulations of the corresponding roll material at a right angle to the direction of advance of the material From

  the middle feed roller 3, the material in

  the water is guided on guide rollers 3 1, 3 2, 3 3, 3 4,3 5 and 3 6 which are mounted on the frame 5, and in the apparatus 1, according to the invention, to produce

appear

  ripples This / will now be described in more detail.

  The apparatus 1 basically consists of a pair of rollers 7 for producing corrugations which are mounted on the frame 6 and which are provided with means for producing a profile which extend parallel to each other

  around the periphery of the rollers to form the on-

  dulations in the roll material in the direction of advance, as described in more detail below From the rollers 2 7, 2 8, 7 and 4 7, 4 8 to produce undulations, at least two of the strips of material are guided through means 10 for applying a

  adhesive and the three strips of material are then attached

  born together on guide rollers 11 and in a section 12 where agglomeration occurs Finally, the material is directed to conventional drying stations,

  cutting and others (not shown).

  The basic problem existing in connection with the realization of corrugations on a material in roll according to its direction of advance, resides in the fact that if one used an apparatus for producing corrugations built according to the principles applied for the formation of corrugations described above. above, at a right angle

  in relation to the direction of advance of the material, that is

  that is to say comprising rollers having rings, for

  read a profile, fixed, parallel, extending

  around the periphery of the rollers, the material would be

  subject to significant and very likely constraints

  blablely it would be torn to shreds by the means intended to carry out the undulations In any case, it would not be possible to carry out undulations

  uniform and high quality in such a device can

  that the peripheral speed at the end of the means for producing a profile, provided on the rollers, would be higher than the peripheral speed at the base of these means for producing a profile, which also leads

  to the exercise of constraint E on the matter.

  Referring to Figures 1 and 2, we see that this problem is overcome, according to the invention, using

  an apparatus 1, for producing undulations, which

  takes two rollers 7 to produce corrugations which are rotatably mounted on the frame 6 and between which the material 9 is corrugated Preferably, one of the rollers, the lower roller 7 in the exemplary embodiment

  shown, is driven by an electric motor 13.

  The particular arrangement of the rollers 7 for

  realize the corrugations is illustrated in figure 4.

  Di referring to it, it clearly appears that the means for producing a profile are nr Avus on the rollers in the form of rings 14 which are arranged in recesses or grooves 15 in such a way that they are guided laterally but are free to rotate in a sliding manner around the periphery of the rollers In order to further reduce the friction between the rings 14 and the bottom of the grooves 15, these grooves and, optionally, the rings also, can be provided with a layer

  16 of antifriction material including plas-

  tick known under the commercial term "Teflon" At their outer ends, which are opposite the roller

  opposite, the rings 14 are shaped in a suitable manner.

  suitable for the desired undulations, that is to say in the form of teeth or the like Between each of the grooves receiving the rings 14, a groove 17 is further provided on the surface of the roller, and in this groove a ring 18 made of material elastomer is inserted, which ring will cooperate with the end of a ring 14

  of the roller opposite The rings 18 in elastic material-

  are intended to facilitate the advance of the material

  in roll 9 since this advance is also assured

  r Ae using rollers 7 to make the waves

  apart from the fact that they favor the advance of

  the material, the rings or inserts 18 of elastic material

  mother also prevent damage simultaneously

  material when it is engaged between the rollers.

  It should be noted, moreover, that according to FIG. 4, the cons-

  truction of the rollers to realize the corrugations is 3 t, for the sake of clarity represented only in a very schematic manner '<and as an example of this, it can be noted that the distance between the rings is, in reality, significantly more

  weak than that shown in the figure.

  It is also clear from Figures 1, 2 and 3 that the device has two

  cylinders of elastomeric material 19, each of these cylinders

  dres being in contact with one of the rollers 7 intended for the production of corrugations, and that the cylinders made of elastomeric material come into contact with the rings 14 - to produce a pro Pf il, / rollers, along the entire length thereof Although the "Teflon" layers are provided between the rings 14 and the grooves 15, it is not possible to guarantee that the friction between the different rings and grooves will be exactly the same and this is due to manufacturing and other tolerances similar factors; the purpose of the cylinders 19 in elastomeric material is therefore to establish contact with

  all 14 rings with light pressure to ensure

  note that the rings 14 also slide freely

in the grooves 15.

  Appropriate heating means 8 are further provided directly in the vicinity of the rollers 7

  intended to realize the ripples and in front of them

  ci, and according to a preferred embodiment, these heating means consist of an infrared heating which is placed at a certain distance above the strip

  of material and which is directed towards the rollers 7 intended

  born to realize the ripples in such a way that

  the rollers are heated to a suitable temperature

  required for producing the corrugations When the means intended to produce a profile, provided on the rollers, have given the material its final shape, the material is cooled by its contact with the ambient air and it results therefrom that the corrugations are frozen

in their final form.

  The rollers 7 intended to produce the corrugations

  tions, constructed as described above, act from

  such that when the heated material is introduced

  pick between the heated rollers, the difference between the peripheral speeds at the end and at the base of the means for producing the profile, which difference is harmful for the formation of the corrugations, is compensated for by the fact that the rings 14 for producing the

  profile can slide on the roller and adjust to them

  same so that the constraints on the material

  are not too high, and it is thus possible to

  avoid tearing of the material or an irregular advance

  lière of this Tests have shown that such an agency-

  allows very good waves to be obtained

  that the aims set out in the introduction are

  qrace damage to the device according to the invention.

  Although the invention has been described with reference

  rence to a particular embodiment, it is clear that many modifications can be made

  without departing from the scope of the invention.

Claims (6)

  1 Device for making corrugations or fluting -   res on a roll material, such as a plastic sheet, a sheet of paper or a metallic sheet, in the longitudinal direction of the sheet, by means of a pair of rollers which cooperate to produce the corrugations, characterized by the fact that the rollers (7) for producing the corrugations are provided with means for producing a profile, arranged in parallel, which extend around the periphery of the rollers and by the fact that these means for producing a profile consist of rings (14 ) which are laterally guided and which are   free to turn on the rollers (7).   2 Apparatus according to claim 1, characterized in that the rings (14) are slidably mounted in grooves (15) provided on the rollers and in that the rings and / or the grooves (15) are provided with a layer (16) of a plastic material known by the commercial term   "Teflon" which reduces friction.   3 Apparatus according to claim 1 or 2, characterized in that the advance of the material is ensured by means of the rollers (7) to produce the corrugations, rollers of which at least one is driven, for this purpose, by a motor electric (13).   4 Apparatus according to claim 3, characterized in that the rollers (7) for producing corrugations are provided, between the rings (14) to produce a profile,   inserts (18) of elastomeric material to promote the comes from the material.   5 Apparatus according to any one of claims   previous, characterized in that the rings (14) -   to produce a profile, provided on the rollers (7) to produce the corrugations, have the shape of teeth at their   ends cooperating with the opposite roller.   6 Apparatus according to any one of claims   above, characterized in that it comprises a pair of cylinders (19) made of elastomeric material, each of these cylinders being in contact with one of the rollers (7) intended for producing undulations, along the entire length of this roller, the cylinders (19) giving the rings (14) the same possibility of rotating freely, sliding around the rollers (7).