ES2253019B1 - "AUTOMATIC CHANGE SYSTEM OF ROLLS IN THE MANUFACTURE OF CARTON ONDULADO". - Google Patents

Abstract

A system for automatically switching webs in the manufacture of corrugated board. Corrugated board is manufactured with corrugators comprising several machines in line comprising among others the double gluing unit and the drying table, the operator manually carrying out between these two the cutting off and/or the splicing of the corrugated medium webs for the production of the corrugated board web. According to the system of the invention first and second automatic cutting off means and first and second splicing means are arranged between the double gluing unit and the drying machine in order to carry out the cutting off and the splicing of the inner and outer fluted walls, respectively, said system comprising control means for automatically carrying out said cutting off and splicing operations.

Description

Automatic roll change system in the corrugated cardboard manufacturing.

Object of the invention

The present invention aims at a automatic roll change system in cardboard manufacturing corrugated, which allows flexible and versatile performance without interruptions the change of rolls in the production of cardboard Wavy one of several channels.

Field of the Invention

The basic cardboard manufacturing process corrugated is based on the undulation of a paper causing what is Call a wave profile. Subsequently this wave profile is adheres to two roles on both profile crests. This stuck of the papers generates a band of three papers with a thickness equivalent to the wave profile used with the paper it has suffered The ripple process. Therefore, the basic cardboard consists of three roles that can be expanded to five, seven and nine as per Increase the number of wave profiles by gluing the papers together. The corrugated cardboard production line is called corrugator and consists of machines installed in series developing various functions.

At present, in corrugated cardboard there is a  series of different wave profiles, also called channels, The most common examples of wave are: N, M, O, E, F, B, C, A.

Each wave profile or channel has a height of different step so the manufactured cardboard has a final thickness Different depending on each wave and papers used.

Wave profiles can be manufactured in combinations of a wave, called a simple channel; two channel, called double-double cardboard; three channel, called triple wave or triple and even four channels, called quadruple.

Simple face is called a wavy paper glued only by one of its faces with a plain paper forming a band of two papers stuck together. So it has simple face E, B, C, A, N, M, O, F, etc ..., according to the wave profile used for  manufacture for simple face. Hereinafter, it will be used indistinctly the word channel or simple face, or rather single-sided channel, to indicate the band of cardboard that the system must cut or thread.

Examples of splicing for manufacturing corrugated cardboard:

B to BC equivalent to single channel splicing B to double channel BC.

C to BC equivalent to single channel splicing C to double-double BC.

C to B equivalent to single channel splice C  single channel B.

EBC to BC equivalent to triple channel splice EBC to double-double BC.

BC to EBC equivalent to double channel splicing BC to triple EBC.

Currently, the corrugator is a line of production consisting of several machines installed in series. The different functions of these machines allow at the end of the production line you have the cardboard manufactured and stacked in different size plates according to the type of cardboard box a manufacture later.

The machine set of a corrugator is basically divided into two parts. The wet part and the dry part. The wet part consists of the machines necessary to form the paper ripple and the. glued from them. The dry part is It consists of the machines necessary for the transformation of the cardboard band made of cardboard sheets of different measure.

The wet part is composed of following machines:

Bobbin holder or unwinder, splicer, corrugating body, preheater, bridge, double-gluing, drying table.

The dry part is composed of:

Auxiliary cutter, Cutter-Slitter, Cross Cutter, and Stacker.

Currently, in the corrugators there is a situation in the process that interrupts production and continuous operation of the manufacturing line.

Now there are a number of drawbacks with the known corrugators. So, when for reasons of production the manufacturing line must change the type of band cardboard, that is, when it is necessary to change the combination of simple faces at the entrance of the table, then the corrugator has What to stand The change of simple face to manufacture is made between the double-gluing and drying table. In a case, the change of simple face of the manufactured cardboard is done by adding another simple face or channel that is being manufactured up to that moment, in other cases it will be completely changed from simple face, so the one in production will be cut and will enter the Drying table the new simple desired face. In all these changes the manufacturing line or corrugator has to stop until zero speed, or practically zero, cut the simple face in production or threading the new simple face inside the table and restart the entire line until you return to the speed of production cruise In all cases it must be cut or added the corresponding simple faces to make the new paperboard.

Of course, the stop of the corrugator generates unproductive time, and also forces the operator to enter the machine to thread or cut the simple face, with the consequent risk involved because the corrugator is not disconnected The undulator could mistakenly get in operation at any time and there are high areas temperatures that can cause significant burns to Operators The descent of speed of the corrugator generates in turn a decrease in the quality of the cardboard manufactured since the regime of production temperatures is significantly altered. He cardboard waste generated by channel changes until no regime speed is reached are important.

The system object of the present invention Eliminate the aforementioned inconveniences. This system is used exclusively in the wet part of the corrugator to improve the productivity and increase your operational security. The system of the invention is installed between the double-glue and the drying table The invention allows the change of any combination of simple face of the speed corrugator Production without operator intervention, automatically or manually under the control of the line operator. Saying system cuts and splices any type of simple face and does not matter the size of the wave profile of it.

The automatic channel switching system in the  Manufacture of corrugated cardboard object of the present invention is essentially characterized because between the double-gluing and drying table part wet of the corrugator comprises first cutting means automatic to cut the single face channel exterior / upper and second automatic cutting means for cut at least one single-sided channel interior / intermediate, first means of automatic splicing of the single-channel outer / upper face and seconds automatic splicing means of at least one single-channel inner / intermediate face, and means of control to automatically make the cuts and splices of the single-channel outer / upper face and / or at least one of the channels - simple inner / intermediate faces  of the resulting band of multi-channel corrugated cardboard completed with conventional bottom face paper, which allow make these changes in a versatile way in continuous mode.

According to the invention, the first cutting means  automatic channel-simple face outer / upper basically comprise a blade that acts at guillotine mode presenting the width of the machine and acting on a support that occupies the entire width of the machine, and because the first splicing means comprise pressurized air means that push the cut free end of the single-channel outer / upper face towards the blanket from the top floor of the drying table that follows to make the splice with the channel-simple face adjacent interior / intermediate by means of the tail in the corrugated profile the aforementioned extreme / upper channel.

According to the present invention, in combination with the first means of cutting and the first means of splicing of the single-channel outer / upper face, comprises suspension means of said single-sided channel outside / top when it has been cut, waiting for completion from splice to channel-simple face corresponding interior / intermediate when applicable.

The invention comprises a tube transverse to the machine that is provided with perforations where the pressurized air jets for splicing correspondent.

According to the invention, the second cutting means  automatic single-channel, single-sided interior / intermediate basically comprise a cutting blade rotary that presents the width of the machine, and because the seconds splicing means comprise pressurized air means that push the free end cut from the channel-simple face interior / intermediate to the space between the upper telera and the Conventional bottom side paper drag drum located immediately before the drying table, for splicing of said channel-single inner / intermediate face with the channel-simple outer / upper face by glue in the manner described and with said bottom face paper by the tail that presents the aforementioned single-channel face lower / intermediate in the wavy profile adjacent to the mentioned paper underside.

According to the present invention, in combination with the second cutting means and the second splicing means of the single bottom / middle face channel
day, it comprises means for suspending the single inner / intermediate face channel when it has been cut, waiting for the splicing to the corresponding single outer / upper face channel of the lower face paper when appropriate.

The splicing means consist of a tube transverse to the machine provided with perforations where they leave Pressurized air jets for splicing correspondent.

The control means of the invention consist in a control panel comprising indicators, buttons and selectors, corresponding to activated current indicator, light flashing indication, manual cutting of the Single channel-bottom face, manual cutting of the single-channel upper face, circuit open / closed, manual splice Channel-simple top face, manual splice single channel-bottom face, automatic activation for automatic transmission, selector to operate manually, current channel combination, next channel combination, selector for the interface with the control computer, selector for the interface with the splicer of single channel-bottom face, and selector for the interface with the single-sided channel splicer higher.

The system of the invention comprises means of threading, cross photocells, and brake means of the Simple channel-face on the bridge.

The system of the invention allows to realize Any convenient channel change.

The system basically performs two operations, threading the channel - simple face inside the table Drying and cutting of the simple face.

These operations in the case of two Simple-face channels consist of performing any simple channel change in single-sided channel inferior to double-double threading the single-channel upper face; channel. simple with single-channel face superior to double-double threading the single channel-bottom face; double-double to single channel with the single channel-bottom face; Y double-double to single channel with the single-channel upper face.

The system of the invention allows the use of accumulated channel in the conventional accumulator means of the undulating until it is spliced again.

These and other features will come off better than the detailed description that follows, to facilitate which three sheets of drawings are accompanied in which it has been represented a case study that is cited only by way of non-limiting example of the scope of the present invention.

Description of the drawings

In these drawings:

Figure 1 illustrates the exchange system Automatic roll in the manufacture of corrugated cardboard invention, in the case where the corrugated cardboard comprises two outer / upper and inner / intermediate rolls or channels and paper  conventional lower face, when cutting and subsequent splicing of the outer / upper channel.

Figure 2 is a view similar to Figure 1 in which the cutting and subsequent splicing of the channel is carried out indoor / intermediate

Figure 3 is a front view illustrating the  control means comprising a control panel for the automatic change of rolls or channels in the formation of cardboard corrugated, according to an embodiment example.

Detailed description of the embodiment

In accordance with the drawings, the system of automatic change of rolls in the manufacture of corrugated cardboard, according to the invention, it is applicable to corrugating machines Conventional used in the manufacture of corrugated cardboard -no illustrated- in which each corrugator comprises several machines installed in series that is basically divided into a wet part and a dry part, whose wet part comprises the bobbin holder or unwinder, splicer, body corrugating, preheater, bridge, double-glue and drying table, and whose dry part comprises the auxiliary cutter, cutter-splitter, cross cutter and stacker, which manually performs the cutting and / or splicing of rolls corrugated cardboard between the double-gluing machine and the drying table of the wet part in obtaining the band of cardboard of one or several channels that at the end of the dry part cut into plates.

The system of the invention performs automatically, which is done manually by the operator at risk of their physical integrity, in the sense of making the cut and / or splicing of corrugated cardboard rolls between the double glue machine,  with the general reference (DE) in the drawings, and the drying table (MS) of the wet part of the corrugator in question.

To facilitate the understanding of the invention and for simplicity of the drawings, in said figures 1 and 2 it has been the aforementioned double glue (DE) and fragmented illustrated and drying table (MS), and the space between them, in whose space in conventional undulating machines without the system of the present invention, the operator has to work in issue, making the cutting and / or splicing of the rolls of corrugated cardboard, with serious risk of integrity, in addition to significant losses of time and material that cannot be used.

As illustrated in Figures 1 and 2 of the drawings, the system of the present invention between the double-gluing machine (DE) and the drying table (MS) of the  wet part of the corrugator -not illustrated- comprises first automatic cutting means (1) for cutting the single-channel outer / upper face (CES) and second automatic cutting means (2) for cutting at least one channel-single inner / intermediate face (IIC), first automatic splicing means (3) of the single-channel outer / upper face and seconds automatic splicing means (4) of at least one single-channel inner / intermediate face, and means of control (MC) to automatically perform the cuts and splices of the single-channel outer / upper face (CES) and / or of at least one of the simple faces-channels Inner / intermediate (IIC) of the resulting corrugated cardboard strip Multi-channel completed with bottom side paper (PCI) conventional, which allow to make such changes in a way Versatile in continuous mode.

According to the system of the invention, the first automatic single-channel cutting means (1) outer / upper face (CES), illustrated in continuous and thick line in figures 1 and 2, while said simple channel (CES) is continuous during the normal carton formation process wavy that can be called a first phase, before being cut. After cutting, in a second phase mode that illustrated in the dotted line drawings, goes to a third phase of "wait" to be spliced again, in whose phase of waiting is illustrated in dashed lines, whose means of cutting (1) basically comprise a blade (5) that acts as a of guillotine that presents the width of the machine and that acts on a support that occupies the entire width of the machine. For their part, the  first splicing means comprise pressurized air means (3) that push the cut free end (E) of the single-channel outer / upper face (CES) towards the blanket (6) of the upper telera (7) of the drying table (MS), whose Fourth phase of splicing is illustrated in the line and dot drawings alternated, which follows to perform the splicing with the single-channel inner / intermediate face (IIC) adjacent by the tail (CO) that presents in the wavy profile (PO) the aforementioned extreme / upper channel.

The system of the invention comprises in combination with the first cutting means (1) and the first splice means (3) of the single-sided channel exterior / superior (CES), suspension means (8) of said single-channel outer / upper face (CES) when been cut, and in the "wait" phase waiting for the realization of the splice to the single-sided channel corresponding internal / intermediate (IIC) when applicable.

The aforementioned means of pressurized air (3) which push the cut free end (E) of the channel (CES) comprise a transverse tube to the machine - not illustrated in detail - that it is provided with perforations where the air jets leave at  pressure (CH) to perform the described splice.

According to the system of the invention, the seconds automatic cutting means (2) of at least one single-channel inner / intermediate face (IIC) they basically comprise a rotating cutting blade (9) that It presents the width of the machine. For its part, the second means of splicing comprise pressurized air means (4) that push the free end cut (E ') of the channel-simple face interior / intermediate (IIC) towards the space between the telera (7) upper and lower side paper (PCI) paper drag drum (10) conventional located immediately before the drying table (MS), to perform the splicing of said single-channel inner / intermediate face (IIC) with the single-channel outer / upper face (CES) by glue (CO ') in the manner described and with said bottom side paper by means of the queue presented by the said simple-channel  lower / intermediate face (IIC) in the wavy profile (PO ') adjacent to the aforementioned bottom side paper (PCI).

The system of the invention comprises in combination with the second cutting means (2) and the second splice means (4) of the single-sided channel lower / intermediate (IIC), which is illustrated as in Figure 1, in a continuous and thick line in this first phase species, which once cut as a second phase illustrated in points, and is arranged by means of suspension (11) of the single-channel inner / intermediate face (IIC) when has been cut, remaining in a third phase mode of "wait" waiting for the splicing to the single-channel outer / upper face (CES) corresponding lower side paper (PCI) when applicable, which is illustrated in dashed lines.

The aforementioned means of pressurized air (4) which push the free cut end (E ') of the channel (IIC) to the machine in a fourth phase illustrated in alternate stroke and dot, which constitute the splicing means, consist of a transverse tube to the machine - not illustrated in detail - which is provided with perforations where the pressurized air jets (CH) come out to make the corresponding splice.

The control means (MC) of the system invention, consist of a control panel (15 ') for change Automatic roll (or outer / lower anal e interior / intermediate), which includes indicators, buttons and selectors, corresponding to activated current indicator (1 '), flashing indicator light (2 '), manual cutting of the Single channel bottom face (3 '), manual cutting The single-channel upper face (4 ') circuit open / closed (5 '), manual splice single-channel upper face (6 '), splice manual Single channel bottom face (7 '), automatic activation for automatic transmission (8 '), selector to operate in manual (9 '), current channel combination (10'), next combination of channels (11 '), selector for the interface with the control computer (12 '), selector for the interface with the single channel splice bottom face (13 '), and selector for the interface with the single-sided channel splicer upper (14 ').

The system of the invention comprises means of threading, cross photocells, brake means single-channel face on the bridge -not illustrated with detail-. This system allows any change of channels conveniently. Also, it basically performs two operations, threading the channel-simple face inside the drying table and cutting the Simple face-channel.

In the case of two simple channels expensive, these operations consist of making any change of single channel in simple channel-face inferior to double-double threading the single-channel upper face; simple channel with single-channel face superior to double-double threading the single channel-bottom face; double-double to single channel with the single channel-bottom face; Y double-double to single channel with the single-channel upper face.

The system of the invention allows the use of accumulated channel in the conventional accumulator means of the undulating until it is spliced again.

The invention, within its essentiality, can be put into practice in other embodiments that differ only in detail from that indicated solely by way of example, which will also achieve the protection that collect. This automatic change system can be carried out of rolls in the manufacture of corrugated cardboard with the media, most suitable components and accessories, being able to elements components be replaced by other technically equivalent ones, to be all included within the claims.

Claims (15)

1. Automatic roll change system in the manufacture of corrugated cardboard, by means of a corrugator comprising several machines installed in series that is basically divided into a wet part and a dry part, whose wet part comprises the bobbin holder or unwinder, splicer , corrugating body, preheater, bridge, double-gluing and drying table, and whose dry part comprises the auxiliary cutter, cutter-splitter, transverse cutter and stacker, which manually performs the cutting and / or splicing of corrugated cardboard rolls between the double-gluing machine and the drying table of the wet part in obtaining the cardboard strip of one or several channels that at the end of the dry part is cut into plates, characterized in that between the double-gluing machine (DE) and The drying table (MS) of the wet part of the corrugator comprises first automatic cutting means (1) for effecting the. cutting of the single-outer / upper face channel (CES) and second automatic cutting means (2) for cutting at least one single-inner / intermediate face channel (IIC), first automatic splicing means (3) of the single-channel outer / upper face and second automatic splicing means (4) of at least one single-channel inner / intermediate face, and control means (MC) for automatically cutting and splicing the single-channel outer face / upper and / or at least one of the channels - simple inner / intermediate faces. of the resulting band of multi-channel corrugated cardboard completed with the conventional lower side paper (PCI), which allow these changes to be made in a versatile manner in continuous mode. 2. System according to claim 1, characterized in that the first automatic cutting means (1) of the single-outer / upper-side channel (CES) basically comprises a blade (5) acting as a guillotine that has the width of the machine and acting on a support that occupies the entire width of the machine, and because the first splicing means comprise pressurized air means (3) that push the free cut end (E) of the channel-single outer face / upper (CES) towards the blanket (6) of the upper telera (7) of the drying table (MS) that follows to make the connection with the channel-simple inner / intermediate face (CII) adjacent by means of the tail (CO) which presents the aforementioned extreme / upper channel in the corrugated profile (PO). 3. System, according to claim 2, characterized in that in combination with the first cutting means (1) and the first splicing means (3) of the outer / upper single face channel (CES), it comprises suspension means (8 ) of said single-outer / upper face channel (CES) when it has been cut, waiting for the splicing to the corresponding single-inner / intermediate face channel (IIC) when appropriate. 4. System, according to claim 2, characterized in that it comprises a tube transverse to the machine which is provided with perforations through which the jets of pressurized air (CH) leave to perform the corresponding splicing. 5. System according to claim 1, characterized in that the second automatic cutting means (2) of at least one single-channel inner face /
intermediate (CII) basically comprise a rotary cutting blade (9) that has the width of the machine, and because the second splicing means comprise pressurized air means (4) that push the free cut end (E ') of the single-channel inner / intermediate face (IIC) towards the space between the upper telera (7) and the conventional lower-side paper (PCI) drive drum (10) located immediately before the drying table (MS), to effect the splicing of said single-inner / intermediate face channel (IIC) with the single outer / upper face channel (CES) by means of a tail (CO ') in the manner described and with said lower face paper by means of the tail provided by said channel -Simple lower / intermediate face in the corrugated profile (PO ') adjacent to the mentioned lower face paper (PCI). 6. System according to claim 5, characterized in that in combination with the second cutting means (2) and the second splicing means (4) of the channel- wall / single face intermediate. (CII), comprises means of suspension (11) of the single-inner / intermediate face channel (CII) when it has been cut, waiting for the splicing to be made to the corresponding single-outer / upper face channel (CES) of the lower side paper (PCI) when applicable. System according to claim 5, characterized in that the splicing means consist of a tube transverse to the machine provided with perforations through which the jets of pressurized air (CH) leave to perform the corresponding splicing. System according to claim 1, characterized in that the control means (MC) consists of a control panel (15 ') comprising indicators, buttons and selectors, corresponding to activated current indicator (1'), flashing light of indication (2 '), manual cut-off channel - single lower face (3'), manual cut-off channel - single upper face (4 '), open / closed circuit (5'), manual splice single-channel upper face (6 '), manual splicing of the single-lower face (7'), automatic activation for automatic switching (8 '), selector to operate in manual (9'), current channel combination (10 '), next combination of channels (11'), selector for the interface with the control computer (12 '), selector for the interface with the single-side bottom splicer (13'), and selector for the interfere with the single-face top splicer splicer (14 '). 9. System according to claim 1, characterized in that it comprises threading means. 10. System according to claim 1, characterized in that it comprises crossed photocells. 11. System according to claim 1, characterized in that it comprises single-channel brake means on the bridge. 12. System, according to the preceding claims, characterized in that it allows to make any change of channels conveniently. 13. System, according to claim 1, characterized in that it basically performs two operations, threading the single-sided channel into the drying table and cutting the single-sided channel. 14. System, according to claim 13, characterized in that in the case of two single-sided channels (CES; CII), said operations consist of making any single channel change in single-sided channel to double-double side threading the channel- simple upper face; single channel with single-channel upper side to double-double threading the single-channel lower face; double-double to single channel with the
single channel-bottom face; and double-double to single channel with the single-channel upper face. 15. System, according to the preceding claims, characterized in that it allows to use the accumulated channel in the conventional accumulator means of the corrugator until it is again spliced.