EP3566834B1 - Container cutting die - Google Patents

Container cutting die Download PDF

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Publication number
EP3566834B1
EP3566834B1 EP19000208.9A EP19000208A EP3566834B1 EP 3566834 B1 EP3566834 B1 EP 3566834B1 EP 19000208 A EP19000208 A EP 19000208A EP 3566834 B1 EP3566834 B1 EP 3566834B1
Authority
EP
European Patent Office
Prior art keywords
blades
blade holder
punch
die
housing
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.)
Active
Application number
EP19000208.9A
Other languages
German (de)
French (fr)
Other versions
EP3566834A1 (en
Inventor
Roman Ollé
Manuel González
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.)
Industrias Tecnologicas de Mecanizacion y Automatizacion SA
Original Assignee
Industrias Tecnologicas de Mecanizacion y Automatizacion SA
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
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Application filed by Industrias Tecnologicas de Mecanizacion y Automatizacion SA filed Critical Industrias Tecnologicas de Mecanizacion y Automatizacion SA
Priority to PL19000208T priority Critical patent/PL3566834T3/en
Publication of EP3566834A1 publication Critical patent/EP3566834A1/en
Application granted granted Critical
Publication of EP3566834B1 publication Critical patent/EP3566834B1/en
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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
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member
    • 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
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
    • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
    • 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
    • B26F2001/4463—Methods and devices for rule setting, fixation, preparing cutting dies

Definitions

  • the object of the present invention is a container cutting die, which has features suitable for making a cut in plastic materials for example PLA, PET, PPtype materials and other complex films of different structures and thicknesses, particularly applicable in the manufacture of packages for food use; with the guiding and shapes of punch holders, punches and blades with an opening of less than 10 millimetres.
  • This invention is applicable in machines for cutting containers and preferably, though not in a limiting manner, of containers intended for the food industry.
  • cutting dies provided with a die plate and a punch and blade holder plate, enabled for relative movement with respect to the die plate between: an inoperative or open position, and an operative closed position in which the blades and punches make the cut and/or precut on the material of the containers.
  • the forward positioning of the blades with respect to the punch and blade holder plate is 20 to 25 millimetres; with this length and given that the cross section of the blades is smaller than the cross section of the punches, said blades are very sensitive to lateral forces produced during cutting or precutting operations of the containers, so there is a risk of interference of the blades with the die plate during the forward movement thereof towards the closed position, which causes accelerated deterioration of the cutting edge of the blades and a low quality of the cut made by said blades.
  • FR3022818 discloses a device for cutting multiple objects from a sheet material by means of a press: comprising a matrix with cutting edges with openings arranged at regular intervals and grooves located between the openings and connecting the openings; comprising a set of punches with cutting edges and knives, arranged in a geometry conjugated with that of the matrix with a cutting clearance between the cutting edges of the knives and punches and those of the matrix; allowing a linear relative movement of the knives and punches towards the die and ensuring the cutting and pre-cutting of several objects by penetration of the edges of the punches and knives into the die, all in a single cutting operation.
  • FR2636256 refers to a device which makes it possible to fix elements such as punches 4, the cross-section or material of which does not permit the insertion of screws suitable for fixing them. It consists of two complementary blocks 1 and 2 forming a straight parallelepiped contained in a housing (b) adjacent to housing (a) which receives the punch 4 to be fixed, and at least one screw 5 capable of driving the movable block 1 along its inclined face, thus causing the punch 4 to be blocked by pinching.
  • the cutting die object of the present invention comprising a die plate and a punch and blade holder plate, has improved features in relation to the blades of the punch holder plate, aimed at preventing the bending of the cutting blades and possible interferences with the die plate; and accordingly increasing cutting duration and precision.
  • Another objective of the invention is to provide the blades with a shape that ensures better guiding and especially a perfect housing in the punch plate and the blades.
  • Another objective of the invention is to increase the service life and reliability of the precuts made by the blades in the containers.
  • the cutting blades have a body with a non-circular cross section housed in a tight manner and fixed in a housing having a cross section coinciding in shape and dimensions with the cross section of the body of the blades; such that the front end of the blades projects a distance of less than 10 millimetres from the punch and blade holder plate.
  • the forward positioning of the blades by a distance of less than 10 millimetres, instead of the 20 to 25 millimetres observed in dies existing on the market, prevents said blades from being able to laterally bend due to the lateral forces which are produced during cutting or precutting of the containers, thereby preventing the risk of interference of the edge of the blades with the die plate, so a very long service life of the blades and a much higher quality of the cut container or product are assured.
  • the housing of the punch and blade holder plate and the body of the blades have a rectangular cross section, ensuring better guiding and particularly a perfect housing of the blades by performing at the same time and in the same machine of the punch and blade holder plate other machining for columns and fasteners of the punch and blade holder plate.
  • the mentioned rectangular cross section of the blades and of the housings of the punch and blade holder plate provides a very high precision in the positioning of the blades.
  • the cutting die for containers comprises a die plate (1) and a punch and blade holder plate (2) enabled for relative movement between an inoperative or open position, depicted in Figure 1 , in which the blades (3) and the punches (4) of the plate (2) are spaced from the die plate (1), and an operative closed position, depicted in Figure 2 , in which the blades (3) and the punches (4) make, in combination with the die plate (1), cuts and/or precuts in the containers (not depicted) previously positioned in the die plate (1).
  • the blades (3) have a body (31) with a non-circular cross section, in this specific case rectangular cross section, housed in a tight manner and fixed with the possibility of being extracted in a housing (21) of the punch and blade holder plate (2) such that in the assembly position, shown in Figures 1 and 4 , the front end (32) of the blades (3) projects a distance of less than 10 millimetres from the punch and blade holder plate (2).
  • the mentioned front end (32) of the blades (3) projects 7 millimetres from the punch and blade holder plate (2), this length being sufficient to assure correct operation of the die, making the cut or precut in the material of the container and preventing the lateral bending or deviation of the blades, and the deterioration of their cutting edge, due to the lateral stresses produced during cutting or precutting of the containers.
  • the blades (3) are fixed at their rear end by a removable clamping element (5), depicted by a screw which passes through a separator (51) and is screwed onto the rear end of the corresponding blade (3).
  • the assembly of the clamping element or screw (5) and of the separator element is done at the upper part of the punch and blade holder plate (2) by contacting the mentioned separator (51) in the front portion with a step acting as a stop defined in the mentioned punch and blade holder plate (2).
  • the blades (3) are manufactured in high mechanical strength metal carbide for the purpose of assuring the durability of the cutting edge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

    Object of the invention
  • The object of the present invention is a container cutting die, which has features suitable for making a cut in plastic materials for example PLA, PET, PPtype materials and other complex films of different structures and thicknesses, particularly applicable in the manufacture of packages for food use; with the guiding and shapes of punch holders, punches and blades with an opening of less than 10 millimetres.
    • Field of application of the invention
  • This invention is applicable in machines for cutting containers and preferably, though not in a limiting manner, of containers intended for the food industry.
    • State of the art
  • In the manufacture of containers and in particular of containers for the food industry, it is common to use cutting dies provided with a die plate and a punch and blade holder plate, enabled for relative movement with respect to the die plate between: an inoperative or open position, and an operative closed position in which the blades and punches make the cut and/or precut on the material of the containers.
  • In dies used today for performing these cutting operations, the forward positioning of the blades with respect to the punch and blade holder plate is 20 to 25 millimetres; with this length and given that the cross section of the blades is smaller than the cross section of the punches, said blades are very sensitive to lateral forces produced during cutting or precutting operations of the containers, so there is a risk of interference of the blades with the die plate during the forward movement thereof towards the closed position, which causes accelerated deterioration of the cutting edge of the blades and a low quality of the cut made by said blades.
  • In this sense, it should be mentioned that the deterioration of the edge of the blades causes filaments and irregular ridges in the container cutting areas to be formed, and these are the main concerns of manufacturers and consumers of packaged products.
  • FR3022818 discloses a device for cutting multiple objects from a sheet material by means of a press: comprising a matrix with cutting edges with openings arranged at regular intervals and grooves located between the openings and connecting the openings; comprising a set of punches with cutting edges and knives, arranged in a geometry conjugated with that of the matrix with a cutting clearance between the cutting edges of the knives and punches and those of the matrix; allowing a linear relative movement of the knives and punches towards the die and ensuring the cutting and pre-cutting of several objects by penetration of the edges of the punches and knives into the die, all in a single cutting operation.
  • FR2636256 refers to a device which makes it possible to fix elements such as punches 4, the cross-section or material of which does not permit the insertion of screws suitable for fixing them. It consists of two complementary blocks 1 and 2 forming a straight parallelepiped contained in a housing (b) adjacent to housing (a) which receives the punch 4 to be fixed, and at least one screw 5 capable of driving the movable block 1 along its inclined face, thus causing the punch 4 to be blocked by pinching.
  • Therefore, the technical problem that is considered is introducing improvements in these cutting dies in relation to the blades, which improvements allow the problems set forth above to be solved in a satisfactory manner.
    • Description of the invention
  • The cutting die object of the present invention, comprising a die plate and a punch and blade holder plate, has improved features in relation to the blades of the punch holder plate, aimed at preventing the bending of the cutting blades and possible interferences with the die plate; and accordingly increasing cutting duration and precision.
  • Another objective of the invention is to provide the blades with a shape that ensures better guiding and especially a perfect housing in the punch plate and the blades.
  • Another objective of the invention is to increase the service life and reliability of the precuts made by the blades in the containers.
  • To achieve the proposed objectives, the cutting blades have a body with a non-circular cross section housed in a tight manner and fixed in a housing having a cross section coinciding in shape and dimensions with the cross section of the body of the blades; such that the front end of the blades projects a distance of less than 10 millimetres from the punch and blade holder plate.
  • The forward positioning of the blades by a distance of less than 10 millimetres, instead of the 20 to 25 millimetres observed in dies existing on the market, prevents said blades from being able to laterally bend due to the lateral forces which are produced during cutting or precutting of the containers, thereby preventing the risk of interference of the edge of the blades with the die plate, so a very long service life of the blades and a much higher quality of the cut container or product are assured.
  • According to the invention, the housing of the punch and blade holder plate and the body of the blades have a rectangular cross section, ensuring better guiding and particularly a perfect housing of the blades by performing at the same time and in the same machine of the punch and blade holder plate other machining for columns and fasteners of the punch and blade holder plate.
  • The mentioned rectangular cross section of the blades and of the housings of the punch and blade holder plate provides a very high precision in the positioning of the blades.
  • The use of specific metal carbide has also been envisaged in this invention for the purpose of increasing the service life and reliability of the precutting of the containers, which is a very important parameter for the subsequent separation of the containers in the case of the manufacture of product packs, for example yogurt packs.
    • Description of the figures
  • As a complement to the description provided herein, and for the purpose of helping to make the characteristics of the invention more readily understandable, the present specification is accompanied by a set of drawings which, by way of illustration and not limitation, represent the following:
    • Figure 1 shows a schematic elevation view of a container cutting die, according to the invention, in an inoperative open position.
    • Figure 2 shows a view similar to the preceding one, in which the die is depicted in an operative cutting position.
    • Figure 3 shows an elevation view of an embodiment of the punch and blade holder plate partially sectioned by one of the housings of one of the blades, and in which the corresponding blade is depicted in an exploded view and aligned with said housing.
    • Figure 4 shows a view similar to the preceding one in which the blade is depicted assembled in the corresponding housing of the punch and blade holder plate.
    Preferred embodiment of the invention
  • As can be observed in Figures 1 and 2, the cutting die for containers comprises a die plate (1) and a punch and blade holder plate (2) enabled for relative movement between an inoperative or open position, depicted in Figure 1, in which the blades (3) and the punches (4) of the plate (2) are spaced from the die plate (1), and an operative closed position, depicted in Figure 2, in which the blades (3) and the punches (4) make, in combination with the die plate (1), cuts and/or precuts in the containers (not depicted) previously positioned in the die plate (1).
  • In Figures 3 and 4 it can be observed that the blades (3) have a body (31) with a non-circular cross section, in this specific case rectangular cross section, housed in a tight manner and fixed with the possibility of being extracted in a housing (21) of the punch and blade holder plate (2) such that in the assembly position, shown in Figures 1 and 4, the front end (32) of the blades (3) projects a distance of less than 10 millimetres from the punch and blade holder plate (2).
  • In a preferred embodiment, the mentioned front end (32) of the blades (3) projects 7 millimetres from the punch and blade holder plate (2), this length being sufficient to assure correct operation of the die, making the cut or precut in the material of the container and preventing the lateral bending or deviation of the blades, and the deterioration of their cutting edge, due to the lateral stresses produced during cutting or precutting of the containers.
  • In the embodiment shown in Figures, and as can be observed with greater clarity in the exploded view of Figure 3, the blades (3) are fixed at their rear end by a removable clamping element (5), depicted by a screw which passes through a separator (51) and is screwed onto the rear end of the corresponding blade (3).
  • The assembly of the clamping element or screw (5) and of the separator element is done at the upper part of the punch and blade holder plate (2) by contacting the mentioned separator (51) in the front portion with a step acting as a stop defined in the mentioned punch and blade holder plate (2).
  • In this specific embodiment, the blades (3) are manufactured in high mechanical strength metal carbide for the purpose of assuring the durability of the cutting edge.
  • Having sufficiently described the nature of the invention, in addition to a preferred exemplary embodiment, it is hereby stated for the relevant purposes that the materials, shape, size and layout of the described elements may be modified, provided that it does not imply altering the essential characteristics of the invention claimed below.

Claims (3)

  1. A container cutting die; comprising a die plate (1) and a punch and blade holder plate (2) enabled for relative movement between an inoperative or open position in which the blades (3) and the punches (4) of the punch and blade holder plate (2) are spaced from the die plate (1), and an operative closed position in which the blades (3) and the punches (4) make, in combination with the die plate (1), cuts and/or pre-cuts in the containers, the blades being housed in a tight manner and fixed in a housing (21) of the blade holder plate (2) characterised in that
    - the blades (3) have a body (31) with a non-circular cross section coinciding in shape and dimensions with the cross section of the housing (21),
    - the blades are fixed by means of a clamping element (5) in the housing (21); and
    - the front end (32) of the blades projects a distance of less than 10 millimetres from the blade holder plate (2),
    wherein the clamping element (5) is a screw which passes through a separator (51), resting on a step of the housing (21,) the clamping element (5) being screwed onto the rear end of the body (31) of the blades (3).
  2. The die according to claim 1, characterised in that the housing (21) of the punch and blade holder plate (2) and the body (31) of the blades (3) have a rectangular cross section.
  3. The die according to claim 1, characterised in that the blades (3) are manufactured in a high mechanical strength metal carbide.
EP19000208.9A 2018-05-07 2019-04-30 Container cutting die Active EP3566834B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19000208T PL3566834T3 (en) 2018-05-07 2019-04-30 Container cutting die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201830444A ES2730121B2 (en) 2018-05-07 2018-05-07 PACKAGING CUTTING MATRIX

Publications (2)

Publication Number Publication Date
EP3566834A1 EP3566834A1 (en) 2019-11-13
EP3566834B1 true EP3566834B1 (en) 2021-04-07

Family

ID=66554092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19000208.9A Active EP3566834B1 (en) 2018-05-07 2019-04-30 Container cutting die

Country Status (4)

Country Link
EP (1) EP3566834B1 (en)
DK (1) DK3566834T3 (en)
ES (2) ES2730121B2 (en)
PL (1) PL3566834T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112108565A (en) * 2020-09-04 2020-12-22 江苏艾锐博精密金属科技有限公司 Bidirectional flattening product structure and flattening process thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2636256A1 (en) 1988-09-13 1990-03-16 Pignon Guy DEVICE FOR FASTENING PRESS TOOL ELEMENTS IN THEIR SUPPORT
FR2661341A2 (en) 1988-09-13 1991-10-31 Pignon Guy Device for fixing press-tool elements into their supports
DE4304951A1 (en) 1993-02-18 1994-08-25 Wachsmuth & Co Werkzeugbau Tool for punching single and multiple containers made of plastic film
DE19521604C1 (en) 1995-06-14 1997-04-17 Wachsmuth & Co Werkzeugbau Blades adjusting device for multi-compartment stamping installation
DE10017042A1 (en) 2000-04-05 2001-11-08 Illig Maschinenbau Adolf Method of manufacturing a container from a thermoplastic film u. Combined forming / punching tool to carry out the process
EP2255901A1 (en) 2009-05-27 2010-12-01 CIP-Centrum für Innovative-Produktionssysteme GmbH I.G. Punching tool and method for manufacturing the same
EP1889696B1 (en) 2006-08-14 2012-07-25 Blumer Maschinenbau Ag Punching apparatus and method for using it
FR3022818A1 (en) 2014-06-30 2016-01-01 Sogameca Sas IMPROVEMENT TO TOOLS FOR GROOVED MATRIX CUTTING OF MULTIPLE OBJECTS IN SHEET MATERIAL
CH712805A2 (en) 2016-08-12 2018-02-15 Huber Daniela Holding device for receiving at least one tool, tool for this holding device and method for grinding and positioning of this tool.
EP2690189B1 (en) 2011-03-25 2020-05-06 Nippon Steel Nisshin Co., Ltd. Steel plate with excellent durability for band-shaped die-cutting blade, and band-shaped die-cutting blade

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697462A1 (en) * 1992-11-04 1994-05-06 Multivac France Cutter for rigid plastics films - has support bar containing prismatic shaped blade
DE19929477A1 (en) * 1999-06-26 2000-12-28 Walter Engels Cutting knife has facet facing flank, basic body to which is fixed cutting strip with cutting section and edge, insertion end, groove and thrust piece
DE502004006058D1 (en) * 2004-10-22 2008-03-13 Wachsmuth & Co Werkzeugbau Tool for punching single and multiple containers made of plastic film

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2636256A1 (en) 1988-09-13 1990-03-16 Pignon Guy DEVICE FOR FASTENING PRESS TOOL ELEMENTS IN THEIR SUPPORT
FR2661341A2 (en) 1988-09-13 1991-10-31 Pignon Guy Device for fixing press-tool elements into their supports
DE4304951A1 (en) 1993-02-18 1994-08-25 Wachsmuth & Co Werkzeugbau Tool for punching single and multiple containers made of plastic film
DE19521604C1 (en) 1995-06-14 1997-04-17 Wachsmuth & Co Werkzeugbau Blades adjusting device for multi-compartment stamping installation
DE10017042A1 (en) 2000-04-05 2001-11-08 Illig Maschinenbau Adolf Method of manufacturing a container from a thermoplastic film u. Combined forming / punching tool to carry out the process
EP1889696B1 (en) 2006-08-14 2012-07-25 Blumer Maschinenbau Ag Punching apparatus and method for using it
EP2255901A1 (en) 2009-05-27 2010-12-01 CIP-Centrum für Innovative-Produktionssysteme GmbH I.G. Punching tool and method for manufacturing the same
EP2690189B1 (en) 2011-03-25 2020-05-06 Nippon Steel Nisshin Co., Ltd. Steel plate with excellent durability for band-shaped die-cutting blade, and band-shaped die-cutting blade
FR3022818A1 (en) 2014-06-30 2016-01-01 Sogameca Sas IMPROVEMENT TO TOOLS FOR GROOVED MATRIX CUTTING OF MULTIPLE OBJECTS IN SHEET MATERIAL
CH712805A2 (en) 2016-08-12 2018-02-15 Huber Daniela Holding device for receiving at least one tool, tool for this holding device and method for grinding and positioning of this tool.

Also Published As

Publication number Publication date
DK3566834T3 (en) 2021-05-25
ES2876975T3 (en) 2021-11-15
ES2730121A1 (en) 2019-11-08
EP3566834A1 (en) 2019-11-13
PL3566834T3 (en) 2021-08-09
ES2730121B2 (en) 2021-03-18

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