EP0921938A1 - Machine et procede de fabrication d'une feuille de carton ondule simple face avec traction en amont - Google Patents
Machine et procede de fabrication d'une feuille de carton ondule simple face avec traction en amontInfo
- Publication number
- EP0921938A1 EP0921938A1 EP97935614A EP97935614A EP0921938A1 EP 0921938 A1 EP0921938 A1 EP 0921938A1 EP 97935614 A EP97935614 A EP 97935614A EP 97935614 A EP97935614 A EP 97935614A EP 0921938 A1 EP0921938 A1 EP 0921938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- cylinder
- cylinders
- speed
- cardboard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
- B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
- B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
- B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
- B31F1/2831—Control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
- B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
- B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
- B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
- B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
Definitions
- the present invention relates to the manufacture of corrugated cardboard and more particularly to a machine for manufacturing a single-sided corrugated cardboard sheet by gluing a corrugated sheet of cardboard onto a flat sheet of cardboard called sheet of
- It also relates to a process for manufacturing sheets of single-sided corrugated cardboard, in particular using a machine of the above type.
- FIG. 1 shows a machine 1 of the prior art in a production line 2 of single-sided corrugated cardboard.
- the chain comprises means 3 and 4 for supplying respectively a flat sheet, a cover sheet, and a flat sheet intended to form the fluted sheet.
- These supply means comprise, in a manner known per se, reels of reels 5 which allow good control of the course and braking necessary for the manufacture of cardboard.
- a preheater 6 for the cover sheet generally consisting of a steel cylinder heated by steam and provided with small rollers called “bar feeders” which are used to vary the contact surface paper / cylinder
- a preconditioner 7 for the fluted sheet which in turn comprises, and in addition, a sheet humidification ramp which promotes the formation of flutes.
- the chain 2 also comprises means 8 for evacuating the single-sided cardboard obtained, constituted by a system of belts in the upper part of the chain.
- FIG. 2 shows more precisely, in cross-section, the single-sided machine 1 of the chain of FIG. 1. It comprises, on the side of the fluted sheet feed, an additional preheater cylinder 9 and a humidifier cylinder 10, and on the side of the cover sheet feed, two rotary preheater cylinders 11.
- the machine 1 also comprises a first cylinder 12, grooved, upper, made of stainless steel. It is hollow and arranged to be heated with steam in a manner known per se.
- the machine 1 also comprises a second cylinder 13, fluted, central, made of stainless steel, with an axis parallel to that of the first cylinder substantially tangent to the latter, and for example of the same diameter. 5
- the second cylinder is for example of the type known under the name "Air Drive", manufactured by the French company MARTIN.
- the chamber has two chambers, namely a central chamber heated by steam and a vacuum chamber 15 connected to a device 16 for evacuating.
- the chamber comprises channels 17 drilled over the entire length of the cylinder and communicating with the peripheral surface grooved by holes.
- the machine 1 comprises a third cylinder 18 ** - lower, of smooth surface, of axis parallel to the first two and for example of the same diameter.
- This cylinder is steam heated in a similar way to the first two and is arranged to compress the cover sheet against the edges of the grooves of the grooved sheet, in contact with the periphery of the central grooved cylinder, as will be seen.
- the machine 1 also comprises means 19 for gluing the ridges of the grooves, known in themselves, comprising a laminating roller 20, a glue tank 21 and a gluing roller 22.
- the sheet 23 is intended to form the fluted sheet.
- gear and / or high pressure drive is replaced by a traction upstream of the cylinders.
- the present invention aims to provide a machine and a method for manufacturing single-sided corrugated cardboard which responds better than those previously known. to the requirements of practice, in particular in that it makes it possible to improve the quality of the corrugated cardboard obtained by minimizing the risks of paper cuts at resonant and / or high speed speeds, that is to say for example higher at 300 m / min, and this for a low cost and easy to implement.
- the present invention starts in particular from the idea of always keeping the paper in constant tension between the positive traction means and the grooved rollers, by using the elastic stretch of the paper.
- the present invention proposes in particular a machine for manufacturing a sheet of single-sided corrugated cardboard by gluing a corrugated sheet of cardboard onto a flat sheet of cardboard, comprising a set of three cnauffant cylinders, namely a first cylinder fluted, preforming a flat sheet into fluted sheet, a second cylinder, fluted, central, and a third cylinder, smooth, for supplying the flat sheet, called a cover, in contact with the flutes of the fluted sheet to the periphery of the second cylinder, said machine further comprising first positive drive means by pulling the flat sheet intended to be grooved upstream of the set of cylinders, characterized in that said first positive drive means are located directly upstream and close to the first cylinder and comprise motor means arranged to obtain, at the output of said first positive drive means, a constant speed of supply of the cylinders fluted flat sheet always strictly lower than the linear speed of the sheet imposed on the inlet of said fluted cylinders by the speed of rotation of said flute
- the linear speed of movement of the carcon is directly proportional to the speed of rotation of the grooved cylinders corrected by the factor called consumption factor by the skilled person, depending on the type of groove (not , nong, form, etc.)
- positive drive means of a sheet is meant motor means whose relative turning with respect to the sheet is blocked without allowing sliding or practically without allowing sliding, depending in particular on the width of the paper. These means therefore exert on the sheet considered a fully ⁇ ot ⁇ ce tensile force, much greater than the simple friction forces of the sheet on the cylinder, for example more than three times greater.
- the speed of the first positive drive means is less than or equal to around 5%, for example equal to around 3%, relative to the linear speed;
- the machine comprises second positive drive means by pulling the flat cover sheet, directly upstream and near the third cylinder; - the tension between the first and / or second positive drive means and the set of cylinders is greater than 2 kg / cm;
- the positive traction exerted by the first and / or second positive drive means on the flat sheet is greater than about 3.5 N / cm;
- the machine further comprises third positive drive means by pulling the sheet of corrugated cardboard located directly downstream of the path of the corrugated cardboard with respect to the three cylinders and near said cylinders;
- the first and / or second positive drive means are belt means compressing the sheet between them by making it make an S-shaped path, so that no sliding can exist, which allows perfect control the speed of unwinding of the paper relative to the speed of the motor means (it is strictly equal).
- the third positive drive means comprise a sixth cylinder provided with means for applying the cardboard sheet against the external wall of said sixth cylinder, with an axis parallel to the other cylinders, said sixth cylinder being arranged to be in contact with the sheet on an arc corresponding to an angle at the center ⁇ of a third determined value;
- the application means associated with at least one of the fourth, fifth and sixth cylinders are suction means of the cardboard sheet, through holes drilled in the surface of the wall of said cylinder.
- the positive drive means of the fourth cylinder comprise means for actuating the cylinder in rotation arranged to obtain a speed of supply of flat sheet intended to be grooved strictly less than the speed of movement of the cardboard at the outlet of the set of cylinders controlled for example by optical means, for example by an encoder;
- the positive drive means of the fifth cylinder include means for actuating the cylinder in rotation arranged to obtain a speed of supply of a flat sheet of cover strictly lower than the speed of movement of the cardboard at the outlet from the set of cylinders.
- the underspeed of the fourth and / or fifth cylinder or of the other types of drive means is less than around 5%, 3% or even 1% or 0.5 % compared to the speed of movement of the cardboard, which can be the speed, respectively, of the first and / or of the third cylinder in the event of total absence of slipping.
- the fourth and / or fifth heating cylinders are of a larger diameter than the first three heating cylinders, for example 1.5 times larger;
- the positive drive means and the set of three cylinders are arranged to allow the adjustment of the winding angles of the sheets cardboard around the set of three cylinders located downstream of said means.
- Such an arrangement makes it possible to adjust the heating of the corrugated cardboard formed as a function of the running speed, which in particular makes it possible to avoid cooking the cardboard, for example at the start of manufacture or at the end of manufacture of the corrugated cardboard;
- the fourth and / or fifth cylinders are arranged to allow adjustment of the winding angle of the cardboard sheet on the fourth and / or fifth cylinder;
- the machine further comprises at least one smooth cylinder of small diameter, of axis parallel to the axis of the heating cylinders, located upstream of the cylinders on the path of the corrugated board and below the horizontal plane tangent to the generator upper of the fourth and / or fifth cylinder;
- the determined value of the winding angle on the fourth and / or fifth cylinder is greater than on the order of 30 °, and advantageously greater than 90 °, for example 100 °;
- the determined value of the winding angle corresponds to an arc dimension on the surface of the second cylinder greater than of the order of 50 mm;
- the machine includes means for adjusting the pressure exerted on the corrugated cardboard sheet at the second cylinder, by the third smooth cylinder, below a determined threshold value of 3 kg / cm;
- the machine comprises means for adjusting the distance between the surfaces of the second and third cylinders, said means being arranged to remove any pressure from the third cylinder on the fluted and planar sheets for covering the corrugated sheet, in contact with the second cylinder , during operation of the machine. No contact therefore exists between second and third cylinders.
- the adjustment means are for example spacing means between the periphery of the cylinder, known in themselves. Such a system indeed gives excellent results at unrolling speeds of the cardboard greater than 300 m / min.
- the flat sheet is pressed on the fourth or fifth heating cylinder on the side where the glue is applied by the means for gluing the grooves.
- the machine comprises automatic means for adjusting the relative speeds of the fourth, fifth and / or sixth cylinders with respect to the speed of movement of the cardboard, for example measured optically or via the speed of rotation of a cylinder of the set of three cylinders.
- the invention also provides a method for manufacturing a sheet of simple corrugated cardboard. face, using a machine as described above.
- the traction exerted on the cover sheet and / or the flat sheet intended to be fluted is greater than of the order of 5 N / cm; - The cover sheet and / or the flat sheet intended to be grooved simultaneously with traction is heated; - at the same time as the positive upstream traction, the face of the cover sheet intended to be fluted is heated on the side of the face where it is glued.
- the invention is particularly applicable to the manufacture of a single-sided corrugated cardboard sheet from a fluted cardboard sheet having type B, C or E flutes, and from a flat sheet of cardboard, called a cover sheet. , by gluing one on the other, said sheets being made from paper of grammage less than 140 g, advantageously less than 100 g and / or advantageously between around 80 g and around 130 g.
- the speed of movement of the cardboard during said manufacture is greater than 250 m / min, advantageously greater than 350 m / min, preferably greater than 400 m / min and even more preferably greater than 450 m / min, or even 500 m / min.
- the splines of types B, C and E correspond to the French standard NF Q 12-008. They are defined in particular as follows, e being the overall thickness of the corrugated board in mm:
- FIG. 4 is a side view of an embodiment of the invention.
- FIG. 5 is a longitudinal sectional view along V-V, partly cut away of the cylinders of Figure 4, including the fourth and fifth cylinders according to the invention.
- FIG. 6 is a partial sectional view on a larger scale, schematically showing the cylinders of FIG. 4.
- Each of these cylinders is smooth, cnauffant, provided with a suction application system which will be described later for a single cylinder. The same description is therefore also perfectly applicable to the others.
- the cylinder 26 is heated with steam in a similar manner to the other cylinders, for example to reach a skin temperature of the cylinder of between 160 ° C. and 200 ° C.
- It consists of a hollow stainless steel tube and has for example an external diameter identical to the others.
- MARTIN and known under the reference M 260. It comprises two ends 29 and 30, mounted on bearings 31, and a cylindrical body 32, provided with a central cylindrical recess 33 supplied with steam at 34 by one of its ends 30. A channel 35 condensate drain is also provided at this end
- the other end 29 of the cylinder 26 comprises means 36 for driving in rotation, by motor at a nominal operating speed fixed with respect to the speed of the first roller of the single-sided machine, for example strictly less than the latter, or with a tolerance of ⁇ 2%, as long as the sheet feeding speed is flat is lower than the speed of movement of the cardboard at the exit of the set of cylinders.
- the surface 37 of the periphery of the cylindrical body 32 is smooth.
- the term “smooth surface” should be understood to mean a flat cylindrical non-grooved surface, which however may have slight indentations or lunules 38, for example in the form of rectangular slots 40 mm long by 2.5 mm wide and the bottom of which is in the shape of a cylinder portion with a large radius of curvature.
- the recesses On a cylinder such as the "Air Drive” cylinder of the MARTIN company, the recesses generally occupy less than 5% of the surface of the cylinder, for example 2.8% and are connected to means 39 of evacuation via two chambers in an arc 41 connected to peripheral longitudinal channels 42 angularly distributed and regularly connected to the lunules 38 via small radial channels 43.
- the chambers 41 belong respectively to two fixed crowns 44 of distribution provided on either side of the cylinder 26 with which they cooperate in rotation, with friction, in a substantially sealed manner, by their side wall.
- a vacuum breaker 45 and / or takeoff device for the carton 46 by injecting compressed air 47 into the channels 42, opposite point 40, is also advantageously provided in a manner known per se.
- the traction on the cardboard sheet is ensured by the speed of the suction cylinder 26, on which is plated the cover sheet of the corrugated cardboard without possibility or practically without possibility of sliding.
- the space between the grooved cylinder 13, central, and the third cylinder 18, smooth, at the point of contact or junction of the two sheets, is greater than the maximum thickness of one sheet of corrugated cardboard to be treated, so that the pressure is zero whatever the papers.
- An empty breaker and / or takeoff device for the cardboard (not shown) which is known per se, is also provided in a similar manner to the takeoff point for the sheet of corrugated cardboard.
- V being the speed of movement of the cardboard
- VI the external speed VI of the cylinders 26 and 27 is for example equal to 0.95V nominal, or 0.99V.
- the cylinders 26 and 27 have axes 26 ′, 27 ′ situated correspondingly to the plane tangent to the point of contact with the first or third adjacent cylinder.
- the axes of the cylinders 12 and 26 are therefore located on the same side of the plane tangent to these two cylinders and the axes of the cylinders 18 and 27, on either side of the corresponding tangent plane.
- Small non-heating rollers 51 and 52, smooth and full, of a type known per se, are for example provided to allow adequate windings at angles ⁇ and ⁇ , by presenting lower generators 53, 54 located below the planes tangent to the upper generatrix 55, 56 of the corresponding cylinders.
- the position is adjustable to allow the winding angles to be modified.
- sufficient distances between the side walls of the cylinders are provided to allow the cardboard sheet to run smoothly.
- the sheet intended to be grooved by the first heating cylinder 12 is pulled by the fourth cylinder 26 at a slightly lower speed to that of cardboard, which is measured nearby by an encoder.
- the cylinder 26 therefore completely relieves the cylinder 12 of this work.
- the sheet is sucked by this fourth cylinder at an angle ⁇ between 90 ° and 180 °.
- the flat cover sheet is in turn pulled by the roller 27, a speed slightly lower than that of the cardboard measured nearby by encoder, which relieves at least partially, or even entirely the means of traction which may also exist. downstream as we will see with cylinder 28.
- the traction is carried out here again and for example by suction of the roller over an angle for example of 100 °, before traveling a small distance, for example ⁇ Ocm without any contact with a cylinder to reach the surface of the third cylinder 18.
- the corrugated sheet formed by the corrugated sheet previously glued and the flat sheet remains in contact with the heating cylinder 13 up to point 57, where the release of the sheet is favored by a jet of compressed air.
- the sheet of corrugated cardboard is then taken up by the sixth cylinder 28, smooth, heating and for example suction, the cover sheet being on the side of the surface of said cylinder, moreover actuated at a speed slightly higher than that of the second cylinder. It then constitutes the positive drive means by traction on said sheet of corrugated cardboard downstream, for example with a tensile force of between 1 and 2 N / cm, for example greater than 1.5 N / cm.
- the sheet is sucked through the holes in the surface of the cylinder 28, for example over 180 °, before separation by blowing jet as described above, then deflection by the roller 52 and evacuation.
- the cylinder 28 is not suction, but simply smooth and heating on an arc of a circle ⁇ , which makes it possible to complete the heating of the adhesive. The additional provisions then remain identical to what is described above, if applicable.
- the tensile force exerted on the corrugated cardboard by the positive drive means constituted by the fourth and fifth cylinders is greater than around 4 N / cm, for example around 5 N / cm or around 8 N / cm.
- the fourth, fifth and sixth cylinders have their speed of rotation automatically controlled by programmable automatic means 58 (in phantom in the figure) at the speed of movement of the cardboard, for example obtained by encoder, in a manner known in itself.
- the present invention is not limited to the embodiment more particularly described. It also relates in particular to the cases where the positive drive means exerting traction are clamping means between rollers of elastic material, belt drive means bearing on a flat or cylindrical sheet, or on another belt, cases where there are additional heating means, for example constituted by a heating table or by an electric dryer or an infrared dryer.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9609250A FR2751584B1 (fr) | 1996-07-23 | 1996-07-23 | Machine et procede de fabrication d'une feuille de carton ondule simple face avec traction en amont |
FR9609250 | 1996-07-23 | ||
PCT/FR1997/001379 WO1998003331A1 (fr) | 1996-07-23 | 1997-07-23 | Machine et procede de fabrication d'une feuille de carton ondule simple face avec traction en amont |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0921938A1 true EP0921938A1 (fr) | 1999-06-16 |
EP0921938B1 EP0921938B1 (fr) | 2000-04-12 |
Family
ID=9494373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97935614A Expired - Lifetime EP0921938B1 (fr) | 1996-07-23 | 1997-07-23 | Machine et procede de fabrication d'une feuille de carton ondule simple face avec traction en amont |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0921938B1 (fr) |
JP (1) | JP2000514740A (fr) |
AU (1) | AU3853897A (fr) |
DE (1) | DE69701704T2 (fr) |
FR (1) | FR2751584B1 (fr) |
WO (1) | WO1998003331A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU1107201A (en) * | 1999-10-12 | 2001-04-23 | James Warren Gere | Single face packaging material |
CN102310592A (zh) * | 2011-09-01 | 2012-01-11 | 湖南益晟机械科技有限公司 | 一种单面瓦楞机的瓦楞辊安装结构 |
CN105818451B (zh) * | 2016-05-23 | 2018-06-26 | 佛山市富利包装机械有限公司 | 一种单面瓦楞机的面纸与芯纸的粘合机构 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1052659A (fr) * | 1900-01-01 | |||
US2742079A (en) * | 1952-12-05 | 1956-04-17 | Molins Machine Co Ltd | Machines for corrugating paper and like materials |
US3189507A (en) * | 1962-03-05 | 1965-06-15 | Container Corp | Feed mechanism for medium fluter |
US3479240A (en) * | 1964-08-03 | 1969-11-18 | Harris Intertype Corp | Prefeeder mechanism for single facer machines |
FR2479871A1 (fr) * | 1980-04-04 | 1981-10-09 | Martin Sa | Machine pour la fabrication de carton ondule simple face |
JPH05138776A (ja) * | 1991-11-18 | 1993-06-08 | Mitsubishi Heavy Ind Ltd | 紙の段成形装置 |
ES2053377B1 (es) * | 1992-03-02 | 1996-01-16 | Torres Martinez M | Sistema para la fabricacion de carton ondulado. |
FR2719521B1 (fr) * | 1994-05-06 | 1996-07-19 | Otor Sa | Machine et procédé de fabrication d'une feuille de carton ondulé simple face par encollage sous traction. |
GB2304125A (en) * | 1995-08-11 | 1997-03-12 | Isowa Kk | Corrugator:single facer:material bonding |
-
1996
- 1996-07-23 FR FR9609250A patent/FR2751584B1/fr not_active Expired - Fee Related
-
1997
- 1997-07-23 WO PCT/FR1997/001379 patent/WO1998003331A1/fr active IP Right Grant
- 1997-07-23 AU AU38538/97A patent/AU3853897A/en not_active Abandoned
- 1997-07-23 DE DE69701704T patent/DE69701704T2/de not_active Expired - Fee Related
- 1997-07-23 EP EP97935614A patent/EP0921938B1/fr not_active Expired - Lifetime
- 1997-07-23 JP JP10506664A patent/JP2000514740A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9803331A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2000514740A (ja) | 2000-11-07 |
FR2751584B1 (fr) | 1998-12-24 |
EP0921938B1 (fr) | 2000-04-12 |
WO1998003331A1 (fr) | 1998-01-29 |
DE69701704T2 (de) | 2000-08-10 |
AU3853897A (en) | 1998-02-10 |
DE69701704D1 (de) | 2000-05-18 |
FR2751584A1 (fr) | 1998-01-30 |
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