EP2855318A1 - Method for preparation of cores - Google Patents

Method for preparation of cores

Info

Publication number
EP2855318A1
EP2855318A1 EP13797189.1A EP13797189A EP2855318A1 EP 2855318 A1 EP2855318 A1 EP 2855318A1 EP 13797189 A EP13797189 A EP 13797189A EP 2855318 A1 EP2855318 A1 EP 2855318A1
Authority
EP
European Patent Office
Prior art keywords
core
lengthening
cores
machined
cut
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
Application number
EP13797189.1A
Other languages
German (de)
French (fr)
Other versions
EP2855318A4 (en
EP2855318B1 (en
Inventor
Jörgen Jensen
Nils Strandh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Core Link AB
Original Assignee
Core Link AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Core Link AB filed Critical Core Link AB
Publication of EP2855318A1 publication Critical patent/EP2855318A1/en
Publication of EP2855318A4 publication Critical patent/EP2855318A4/en
Application granted granted Critical
Publication of EP2855318B1 publication Critical patent/EP2855318B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/50—Methods of making reels, bobbins, cop tubes, or the like by working an unspecified material, or several materials
    • B65H75/505—Working on cores, reels or the like to permit their reuse, e.g. correcting distortion, replacing parts of the core or reel

Definitions

  • the present invention concerns a method according to the preamble of claim 1.
  • Fig. 1 shows four views of cores during different stages whil carrying out an embodiment of the method according to the present invention.
  • Fig. 2 shows three views of cores during different stages while carrying out an embodiment of the method according to the present invention.
  • Fig. 3 shows three views of cores during different stages while carrying out another embodiment of the method according to the present invention.
  • Fig. 4 shows three views of cores during different stages while carrying out yet an embodiment of the method according to the present invention.
  • Fig. 5 shows a layout of a device for carrying out the method according to the present invention .
  • the method according to the present invention will now be described in connection with the preparation or gluing of large cores, e.g. 2540 mm long and having a diameter of 305 mm, onto which non-self-supporting material is wound, e.g.
  • a used core is cleaned of residual material and glue residues.
  • Such an initial core 1 is shown in Fig. 1, and at both ends of the initial core 1, a core piece 2 and 3 is cut off.
  • the length of the core pieces 2,3 may be 50-100 mm.
  • a lengthening core 4 is machined in one of the ends for forming a joint surface 5, which is internal and conical.
  • One of the ends of the cut off initial core 1 is machined for forming a joint surface 6, which is external and conical.
  • the conicity of the joint surfaces 5 and 6 fits to each other.
  • a suitable glue is put on one of or both joint surfaces 5 and 6.
  • the glue may be a cold-water glue or a combination of a cold- water glue and a hot-melt glue.
  • the initial core 1 is assembled with the lengthening core 4 for compression of the joint surfaces 5 and 6 with each other. Compression is effected for a predetermined period of time, e.g. from a number of seconds (e.g. 30 s) to a number of minutes (20 min) depending on the type of glue.
  • the length of the initial core 1 provided with the lengthening core 4 is adjusted to the correct and desired length. If the lengthening core 4 has a length of the total length of the core pieces 2 and 3 plus the horizontal joint surface length, it may be possible to avoid the adjusting cutting of the new reusable core 1 with the glued-on
  • a combination 7 of an initial core with a glued-on lengthening core is shown. From the combination 7, a core piece 8 and a core piece 9 are cut off. The end of the
  • combination 7 which lacks a lengthening core piece, is machined for forming a joint surface 6, which, as in the preceding embodiment, is external and conical for co-operation with a lengthening core 4 having a corresponding joint surface 5.
  • the combination 7 is assembled with the lengthening core 4 for compression of the joint surfaces 5 and 6 with each other for a predetermined period of time. After confirmation of whether the combination 7 with a new lengthening core 4 has the correct length, it can be reinstalled into the reeling machine.
  • the embodiment shown in Fig. 3 is in principle the same as the embodiment disclosed in connection with Fig. 2 except that the combination 7 is turned or rotated half a turn so that the end, which is provided with the lengthening core 4, points in the opposite direction.
  • FIG. 4 there is shown an embodiment, according to which core pieces 8 and 9 are cut off from a combination 7, and the lengthening core end of the combination 7 is machined for forming a joint surface 6 for assembling with a joint surface surfaces 5 and 6, the parts are pressed together for a
  • FIG. 5 there is shown a layout of a machine for carrying out the method according to the present invention.
  • the lengthening cores are moved by means of the discharger 4 and are placed on a conveyor 6 for lengthening cores by means of a transfer robot 5.
  • This robot 5 also transfers cut off core pieces
  • a transfer robot 7 moves lengthening cores from the conveyor 6 to a processing and gluing unit 11 for forming a joint surface.
  • An end-cut core is moved by the discharger 4 to a table 9 having means for zero line adjustment and further to a feed unit 10, by which the core is fed into the processing and gluing unit 11 for forming a joint surface.
  • glue application the joint surfaces are being pressed together and held pressed together for a predetermined period of time.
  • the core provided with lengthening core is placed on the table 12 for further transfer to the grinding unit 13 and a core cutter 14 for removal of surplus glue and length correction.
  • the machine is controlled from an operator console 15.
  • a suction unit 17 is arranged for dust extraction. Furthermore, the machine is surrounded by a protection fence 18, and in the machine, a number of electric cabinets 16 are also included.

Landscapes

  • Replacement Of Web Rolls (AREA)

Abstract

The present invention concerns a method for preparation of cores primarily for non-self-supporting materials, particularly tissue and the like, after removal of material residues and glue residues for allowing re-use of the cores in the same way as new and unused cores a number of times, wherein the ends of an essentially empty core are cut off while retaining the overall length of the core, wherein at least one end of the empty and end-cut core is prepared for joining with a lengthening core prepared for joining for restoration of the core to the original length and for positioning the joint or splice between the core and the lengthening core as near the end of the core joined with the lengthening core as possible, wherein the end of the lengthening core is machined to conical shape, and wherein the clean cut core end is machined to the corresponding conical shape to fit on or in the lengthening core.

Description

METHOD FOR PREPARATION OF CORES
The present invention concerns a method according to the preamble of claim 1.
Particularly in the tissue industry, large cores are used having a length of several metres and an inner diameter of, for instance, 250 to 600 mm. For economical reasons, and not the least environmental reasons, it is a large advantage if such large cores can be re-used as many times as possible. In order to be re-usable, the cores do not only have to have a clean and undamaged envelope surface, but it is in addition necessary to restore the ends to essentially the original state. Thus, there is a need of a method or a methodology for restoration or preparation of the ends of the empty cores for allowing re-use in the machine.
The object of providing a method that meets the above- mentioned need forms the basis of the present invention.
This object is realised by the present invention in the metho mentioned by way of introduction by it being given the characterizing features of the claims.
In the following, the present invention will be described in more detail, reference being made to the appended drawings. Fig. 1 shows four views of cores during different stages whil carrying out an embodiment of the method according to the present invention. Fig. 2 shows three views of cores during different stages while carrying out an embodiment of the method according to the present invention. Fig. 3 shows three views of cores during different stages while carrying out another embodiment of the method according to the present invention. Fig. 4 shows three views of cores during different stages while carrying out yet an embodiment of the method according to the present invention. Fig. 5 shows a layout of a device for carrying out the method according to the present invention . The method according to the present invention will now be described in connection with the preparation or gluing of large cores, e.g. 2540 mm long and having a diameter of 305 mm, onto which non-self-supporting material is wound, e.g.
tissue, so that re-use of identical core lengths is allowed. A used core is cleaned of residual material and glue residues.
Such an initial core 1 is shown in Fig. 1, and at both ends of the initial core 1, a core piece 2 and 3 is cut off. The length of the core pieces 2,3 may be 50-100 mm. A lengthening core 4 is machined in one of the ends for forming a joint surface 5, which is internal and conical. One of the ends of the cut off initial core 1 is machined for forming a joint surface 6, which is external and conical. The conicity of the joint surfaces 5 and 6 fits to each other. A suitable glue is put on one of or both joint surfaces 5 and 6. The glue may be a cold-water glue or a combination of a cold- water glue and a hot-melt glue. After the glue application, the initial core 1 is assembled with the lengthening core 4 for compression of the joint surfaces 5 and 6 with each other. Compression is effected for a predetermined period of time, e.g. from a number of seconds (e.g. 30 s) to a number of minutes (20 min) depending on the type of glue.
After the compression, surplus glue is removed on the outside and on the inside. It is of particular importance that surplus glue is removed on the inside, since the core most often is located on an expanded shaft during the winding of the
material onto the same. If required, the length of the initial core 1 provided with the lengthening core 4 is adjusted to the correct and desired length. If the lengthening core 4 has a length of the total length of the core pieces 2 and 3 plus the horizontal joint surface length, it may be possible to avoid the adjusting cutting of the new reusable core 1 with the glued-on
lengthening core 4. After confirmation of whether the core 1 with the lengthening core 4 has the correct length, it can be reinstalled into the reeling machine.
In Fig. 2, a combination 7 of an initial core with a glued-on lengthening core is shown. From the combination 7, a core piece 8 and a core piece 9 are cut off. The end of the
combination 7, which lacks a lengthening core piece, is machined for forming a joint surface 6, which, as in the preceding embodiment, is external and conical for co-operation with a lengthening core 4 having a corresponding joint surface 5. After application of glue, the combination 7 is assembled with the lengthening core 4 for compression of the joint surfaces 5 and 6 with each other for a predetermined period of time. After confirmation of whether the combination 7 with a new lengthening core 4 has the correct length, it can be reinstalled into the reeling machine. The embodiment shown in Fig. 3 is in principle the same as the embodiment disclosed in connection with Fig. 2 except that the combination 7 is turned or rotated half a turn so that the end, which is provided with the lengthening core 4, points in the opposite direction.
In Fig. 4, there is shown an embodiment, according to which core pieces 8 and 9 are cut off from a combination 7, and the lengthening core end of the combination 7 is machined for forming a joint surface 6 for assembling with a joint surface surfaces 5 and 6, the parts are pressed together for a
predetermined period of time.
Even if the embodiment in Fig. 4 is fully functional, it is, however, preferred to place the lengthening core 4 every second time on every second end of the core combination. This would entail that, in the embodiment according to Fig. 4, the lengthening core 4 would be placed on the right end, as shown in Fig. 4, of the combination 7. This provides optimum
strength by the fact that the central part of the core
combination always will be seamless, that is unjointed, which is of advantage, since the central part of the core is
subjected to the greatest stresses. After placement of a lengthening core 4 on both ends of a core 1, it is not
critical with the selection of end of the core 1 for the placement of a lengthening core 4, although a regularity is preferable .
In Fig. 5, there is shown a layout of a machine for carrying out the method according to the present invention. A magazine 1 with cores, from which tissue residues and glue residues have been removed and which thereby may be said to be empty, is connected to a feeder 2 for feeding one core at a time to a core cutter 3, in which core pieces 2,3,8, and 9 can be cut off from a core and in which an entire core may, if required, be cut into a number of lengthening cores. The lengthening cores are moved by means of the discharger 4 and are placed on a conveyor 6 for lengthening cores by means of a transfer robot 5. This robot 5 also transfers cut off core pieces
2,3,8, and 9 to a conveyor 8, which may lead to a scrap container. A transfer robot 7 moves lengthening cores from the conveyor 6 to a processing and gluing unit 11 for forming a joint surface. An end-cut core is moved by the discharger 4 to a table 9 having means for zero line adjustment and further to a feed unit 10, by which the core is fed into the processing and gluing unit 11 for forming a joint surface. After glue application, the joint surfaces are being pressed together and held pressed together for a predetermined period of time. The core provided with lengthening core is placed on the table 12 for further transfer to the grinding unit 13 and a core cutter 14 for removal of surplus glue and length correction. The machine is controlled from an operator console 15. A suction unit 17 is arranged for dust extraction. Furthermore, the machine is surrounded by a protection fence 18, and in the machine, a number of electric cabinets 16 are also included.
Numerous modifications of the embodiments according to the present invention described above are naturally possible within the scope of the general idea of the invention defined in the subsequent claims.

Claims

1. Method for preparation of cores primarily for non-self- supporting materials, particularly tissue and the like, after removal of material residues and glue residues for allowing re-use of the cores in the same way as new and unused cores a number of times, characterized in that the ends of an
essentially empty core are cut off while retaining the overall length of the core, that at least one end of the empty and end-cut core is prepared for joining with a lengthening core prepared for joining for restoration of the core to the original length and for positioning the joint or splice between the core and the lengthening core near the end of the core joined with the lengthening core, that the end of the lengthening core is machined to conical shape, and that the clean cut core end is machined to the corresponding conical shape to fit on or in the lengthening core.
2. Method according to claim 1, characterized in that the core is joined with a lengthening core having a sufficient length to allow, after the joining, restoration of the original length of the core by cutting the lengthening core end and/or the end of the core opposite the lengthening core.
3. Method according to claim 2, characterized in that the end of the lengthening core is machined internally, and that the end of the core is machined externally.
4. Method according to claim 3, characterized in that one or more glue strings are applied to at least one of the machined surfaces, and that the lengthening core and the core are being pressed together and held pressed together for a predetermined period of time.
5. Method according to claim 4, characterized in that surplus glue is removed on the inside and/or the outside.
6. Method according to claim 1, characterized in that an empty core is cut off to suitably long lengthening cores, and that one of the ends of a selected lengthening core is machined to a suitable joining surface.
7. Method according to any one of the preceding claims,
characterized in that an empty core with a lengthening core in one of the ends is turned so that the end without lengthening core is machined for joining with a lengthening core.
8. Method according to claim 7, characterized in that empty cores with a lengthening core in both ends are end-switched so that different ends of the core are provided with lengthening core from time to time.
9. Method according to claim 7 or 8, characterized in that the length of the lengthening core is varied.
EP13797189.1A 2012-05-29 2013-05-16 Method for preparation of cores Active EP2855318B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1200332A SE536896C2 (en) 2012-05-29 2012-05-29 Ways of preparing sleeves
PCT/SE2013/000075 WO2013180614A1 (en) 2012-05-29 2013-05-16 Method for preparation of cores

Publications (3)

Publication Number Publication Date
EP2855318A1 true EP2855318A1 (en) 2015-04-08
EP2855318A4 EP2855318A4 (en) 2015-07-15
EP2855318B1 EP2855318B1 (en) 2018-08-08

Family

ID=49673691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13797189.1A Active EP2855318B1 (en) 2012-05-29 2013-05-16 Method for preparation of cores

Country Status (3)

Country Link
EP (1) EP2855318B1 (en)
SE (1) SE536896C2 (en)
WO (1) WO2013180614A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CL2023000180A1 (en) * 2023-01-19 2023-02-24 Romualdo Gallardo Angulo Juan A cutting and beveling machine for cardboard coils, for its recovery.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE470442B (en) 1993-02-18 1994-03-28 Uno Johansson Ways to joint bobbin sections and plant for this
US5845871A (en) * 1996-04-29 1998-12-08 Csi Core Specialties Inc. Recycled core for winding paper
FI104551B (en) * 1998-07-15 2000-02-29 A P E Trading Oy Method and apparatus for attaching paper roll cores end to end
SE0102452L (en) * 2001-07-05 2003-01-06 Core Link Ab Method and device for jointing
SE525100C2 (en) * 2003-04-01 2004-11-30 Core Link Ab Device for applying a sheet of material
FI20041609A0 (en) * 2004-12-15 2004-12-15 Ari Piispanen Recycling process
US8444794B2 (en) * 2009-10-14 2013-05-21 Automatic Handling International Core joiner and cutter apparatus

Also Published As

Publication number Publication date
EP2855318A4 (en) 2015-07-15
SE536896C2 (en) 2014-10-21
EP2855318B1 (en) 2018-08-08
WO2013180614A1 (en) 2013-12-05
SE1200332A1 (en) 2013-11-30

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