EP3507067A1 - Cardboard-cutting tool equipped with a compressible ejection element, and cutting machine equipped with such a tool - Google Patents
Cardboard-cutting tool equipped with a compressible ejection element, and cutting machine equipped with such a toolInfo
- Publication number
- EP3507067A1 EP3507067A1 EP17768839.7A EP17768839A EP3507067A1 EP 3507067 A1 EP3507067 A1 EP 3507067A1 EP 17768839 A EP17768839 A EP 17768839A EP 3507067 A1 EP3507067 A1 EP 3507067A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- compressible
- ejection element
- tool
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1818—Means for removing cut-out material or waste by pushing out
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/384—Cutting-out; Stamping-out using rotating drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
Definitions
- the present invention relates to the field of flat or rotary press type cardboard cutting machines and more specifically to the field of cardboard cutting tools for such machines, such tools comprising means for ejecting the cardboard.
- the invention relates particularly to these cardboard ejection means present on the tool.
- Carton cutting tools implemented on carton cutting machines are well known to those skilled in the art.
- such a tool comprises at least one blade, also called cutter, which defines a shape corresponding to the shape of the cut to be made on the sheet of cardboard.
- This at least one blade is mounted on a base, also called a "wood".
- This base can be flat in the case of a flat press, or circular in the case of a rotary press.
- the blade During the cutting operation by a translational movement or rotation of the cutting tool, the blade enters the cardboard sheet and then leaves the latter, showing the cut. During the extraction of the cardboard blade, it can hang on the blade.
- a compressible ejection element consisting of a block of foam glued to the base near the blade.
- the foam block is compressed and during the release of the blade, said foam block relaxes and pushes the cardboard to eject the blade.
- a disadvantage of such foam blocks is their rapid delamination with use, requiring frequent replacement (about every three months) of the foam blocks on the cutting tools.
- This delamination can be slowed down by using more efficient foam, "high-end", which however considerably increases the cost of the cutting tool.
- This delamination of the foam imposes a rigor of control and replacement of foam blocks in certain areas, for example in the food industry, because it is essential to prevent delaminated foam pieces from being found on the chain. of production.
- the cutting of the cardboard also generates a lot of cardboard dust which penetrates the pores of the foam and the mouths, which greatly reduces the dynamism of the foam blocks, they losing all their effectiveness. This makes it more difficult to clear the board from the blade.
- the present invention aims to overcome the aforementioned drawbacks.
- the invention firstly relates to a compressible element for ejecting a cutting tool for a carton cutting machine of the flat press or rotary press type.
- the invention also relates to a carton cutting tool equipped with one or such compressible ejection elements, and a cardboard cutting machine equipped with one or such cutting tools.
- the tool according to the invention comprises at least one blade, also called cutting net, which defines a shape of the cardboard to be cut. However, it is possible to envisage several blades defining several shapes, or even several blades defining in combination a single shape.
- the tool comprises at least one compressible ejection element which is arranged near the blade and configured to push the carton after cutting by the blade.
- the compressible ejection element comprises a multilayer structure comprising at least one compressible foam base and a protective film coming into contact with the carton during the cutting operation.
- the foam base provides the compressible ejection element with its dynamism allowing it to properly resume its shape after cessation of compression, that is to say during the clearance of the blade that has just cut the cardboard.
- the protective film covering the foam base prevents direct contact of this foam base with the cardboard during cutting where said foam base is compressed, which greatly reduces the delamination of the latter.
- the protective film prevents the penetration of dust into the compressible foam base, which allows the latter to maintain its initial dynamism for a good ejection of the cardboard during the release of the tool.
- the foam base is made of an elastomer material of the ethylene-vinyl acetate (EVA), chloroprene (CR), styrene-butadiene (SBR) type. or ethylene-propylene-diene monomer (EPDM).
- EVA ethylene-vinyl acetate
- CR chloroprene
- SBR styrene-butadiene
- EPDM ethylene-propylene-diene monomer
- the choice of the foam will depend in particular on the price of the tooling retained, which will have an impact on its performances and its longevity, although it is optimized by the presence of the protective film, an SBR foam being less robust than EPDM foam, itself less robust than an EVA foam.
- the type of cardboard to be cut may also affect the choice of foam.
- the protective film is made of a polyester material, which ensures a good resistance to contact with the cardboard during cutting, allows to properly retain the dust of cardboard to prevent its infiltration into the pores of the foam base, and allows easy cleaning of its outer face with a damp cloth for the removal of dust, without risk of moisture infiltration into the foam base during cleaning.
- the choice of polyester makes it possible to produce a protective film of very small thickness, which makes it possible to work with great precision. This also makes it possible to preserve a substantial foam base thickness without modifying the height of the compressible ejection element, compared to that of the traditional foam blocks, so that said compressible ejection element retains a suitable dynamism and that the dimensions standard cutting tools are preserved.
- an adhesive coating is implemented between an inner face of the protective film and an outer face of the foam base, so as to allow the bonding of the protective film with the foam base.
- the coating is deposited on the inner face of the protective film, then the protective film is adhered to the outer face of the foam base during the design of the compressible ejection element.
- an adhesive coating is placed on the foam base for bonding said compressible ejection element on the cutting tool.
- the adhesive coating is deposited on the inner face of the foam base and then provisionally coated with a sheet of paper before bonding the compressible ejection element on the base.
- the cutting tool object of the invention comprises a base also called "a wood".
- This base is provided with an outer face of which extend the at least one blade and the at least one compressible ejection element.
- the base is flat and the at least one blade and the at least one compressible ejection element extend perpendicularly to said plane.
- the base is circular and the at least one blade and the at least one compressible ejection element extend radially to said base.
- the compressible ejection element is adhered to the external face of the base by means of an adhesive coating, in particular the adhesive coating implemented between the internal face of the base in question. foam, as mentioned above.
- an adhesive coating in particular the adhesive coating implemented between the internal face of the base in question. foam, as mentioned above.
- the cutting tool object of the invention comprises at least two compressible ejection elements respectively arranged on each side of the at least one blade. This allows to clear appropriately the cut cardboard shape as the cardboard rebus, obtained after cutting the cardboard sheet by the blade. The expulsion of the board from the blade is done in a balanced manner, which avoids bursting on the edges of the cardboard cut during its expulsion from the blade.
- the protective film is implemented in a light color so as to distinguish more easily the presence of dust on this compressible ejection element, which allows to perform frequent visual checks to clean the protective film when necessary.
- the cutting tool object of the invention further comprises at least one creasing element that allows for a groove on the carton defining a fold line.
- the tool comprises at least one compressible ejection element arranged close to said creasing element, said compressible ejection element comprising the aforementioned characteristics of the invention.
- two compressible ejection elements are arranged respectively on each side of the creasing element, in the vicinity thereof, which allows an expulsion of the cardboard homogeneously.
- the invention also relates to a carton cutting machine comprising at least one cutting tool that has at least the aforementioned essential characteristics on the compressible ejection element or elements, implementing the invention.
- This cutting machine can be of the flat press type.
- the machine comprises a planar matrix on which is arranged the cutting tool which has a base of flat shape.
- This cutting machine can instead be of the rotary press type.
- the die is a roll on which is arranged the cutting tool which has a circular base.
- FIG. 1 shows schematically in side view a cutting tool implemented on a plane flat press die, showing in particular a blade and a compressible element
- FIG. 2 schematizes in side view a cutting tool implemented on a rotating rotary die
- Figure 3 shows schematically in enlarged view a compressible ejection element
- Figure 4 shows schematically in front view a cutting tool, according to an alternative embodiment
- FIG. 5 is a diagrammatic view in side view of a cutting tool implemented on a plane flat press die, showing in particular a creasing element and two compressible ejection elements.
- the carton cutting tool is named “the tool” and the carton cutting machine is called “the machine”.
- Figure 1 is illustrated a tool which is mounted on a flat die 2 arranged on a machine 3 of the flat press type, the tool 1 moving in a translational movement back and forth illustrated by the double-arrow 4.
- the tool 1 comprises a base 5 on which is mounted a blade 6 which defines an open or closed shape, according to the cutting of the cardboard to be produced. It is possible to envisage several blades 6 defining in combination a shape or several shapes on the base 5. By way of example, in FIG. 4, the blade 6 defines a shape 7 which is closed on the base 5.
- the tool 1 comprises also a compressible ejection element 8 of rectangular shape for pushing the cardboard on a side 9 of the blade 6 adjacent to said compressible ejection element 8, so as to prevent the cardboard remains gripping said side 9 during the ascent of the blade 6 from cutting the carton (not shown).
- the external face 10 of the compressible ejection element 8 extends beyond the end 11 of the blade 6, under normal conditions where said compressible ejection element 8 is not stressed, that is, that is to say outside a cutting phase of the cardboard.
- the matrix 2 consists of a roll (or cylinder), the base 5 is circular and the excremental compressible element 8 preferably has a circular portion shape.
- the compressible ejection element 8 comprises a foam base 12 and a protective film 13.
- the foam base 12 is made of a styrene-butadiene elastomer material (SBR ) which will preferably be retained in order to reduce the manufacturing cost of the tool 1.
- SBR styrene-butadiene elastomer material
- the protective film 13 is preferably made of a white-colored polyester material or any other light color in order to easily display the cardboard dust deposits generated during the cutting of the cardboard.
- the outer face 14 of the protective film 13 constitutes the outer face 10 of the compressible ejection element 8, coming into contact with the carton during the cutting and ejecting operation.
- the inner face 15 of the protective film 13 receives an adhesive coating 16 for bonding said film to the outer face 17 of the foam base 12.
- the inner face 18 of the foam base 12 receives an adhesive coating 19 allowing bonding said base to the outer face 20 of the base 5.
- the adhesive coating 19 will preferably be protected by a strip of paper before bonding the compressible ejection element 8 on the base 5.
- FIG. 4 is a schematic representation of a variant of the tool 1 showing in particular the possibility of positioning compressible ejection elements 8, 8 'on each side of the blade 6, for each portion of said blade 6 defining the shape 7.
- the lengths of the compressible ejection elements 8, 8 ' will depend in particular on the lengths of the portions of the blade 6.
- FIG. 5 shows a tool 1 corresponding for example to that of FIG. 1, the tool 1 moving in a reciprocating movement illustrated by the double-arrow 4 on the machine 3.
- the Tool 1 of Figure 5 will implement the same or similar characteristics to those described above for Figures 1 to 4, according to whether it is a machine 3 type flat press or rotary press.
- the tool 1 comprises a creasing element 21 which makes it possible to make a groove in the carton during the actuation of the tool, this groove defining a fold line on the carton instead of a cut as in the case of the blade 6 previously described.
- This creasing element 21 is mounted on the base 5.
- the tool 1 also comprises two compressible ejection elements 22, 22 'of rectangular shape for pushing the cardboard on both sides 23, 23' of the blade 6 adjacent to said element compressible ejection 22, 22 ', so as to homogeneously expel the cardboard during the ascent of the creasing element 21.
- the design of these two compressible ejection elements 22, 22' is identical to that described above for the compressible ejection elements 8, 8 '.
- the end 24 of the creasing element 21 extends slightly beyond the external faces 25, 25 'of the compressible ejection elements 22, 22', as shown in FIG. remains possible, however.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1670489A FR3055567B1 (en) | 2016-09-05 | 2016-09-05 | CARDBOARD CUTTING TOOL EQUIPPED WITH COMPRESSIBLE EJECTION ELEMENT AND CUTTING MACHINE EQUIPPED WITH SUCH A TOOL |
PCT/FR2017/052319 WO2018042134A1 (en) | 2016-09-05 | 2017-09-01 | Cardboard-cutting tool equipped with a compressible ejection element, and cutting machine equipped with such a tool |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3507067A1 true EP3507067A1 (en) | 2019-07-10 |
Family
ID=57349071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17768839.7A Withdrawn EP3507067A1 (en) | 2016-09-05 | 2017-09-01 | Cardboard-cutting tool equipped with a compressible ejection element, and cutting machine equipped with such a tool |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3507067A1 (en) |
FR (1) | FR3055567B1 (en) |
MA (1) | MA46097A (en) |
WO (1) | WO2018042134A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2024081B (en) * | 1978-06-28 | 1982-02-03 | Mitsubishi Heavy Ind Ltd | Scrap removal means for rotary punching machines |
US4499802A (en) * | 1982-09-29 | 1985-02-19 | Container Graphics Corporation | Rotary cutting die with scrap ejection |
JPH0790514B2 (en) * | 1989-02-20 | 1995-10-04 | 日本ダイスチール株式会社 | Wooden mold used for punching equipment |
CH684187A5 (en) * | 1990-04-26 | 1994-07-29 | Bobst Sa | movable upper tool for a waste stripping station in a cutting machine of sheets for the production of packaging. |
-
2016
- 2016-09-05 FR FR1670489A patent/FR3055567B1/en not_active Expired - Fee Related
-
2017
- 2017-09-01 WO PCT/FR2017/052319 patent/WO2018042134A1/en unknown
- 2017-09-01 MA MA046097A patent/MA46097A/en unknown
- 2017-09-01 EP EP17768839.7A patent/EP3507067A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2018042134A1 (en) | 2018-03-08 |
MA46097A (en) | 2019-07-10 |
FR3055567B1 (en) | 2018-08-17 |
FR3055567A1 (en) | 2018-03-09 |
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Legal Events
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