Classifications

• • 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
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
  • B65B11/008—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material by webs revolving around articles moved along the axis of revolution
• • 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
  • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
  • B65B11/58—Applying two or more wrappers, e.g. in succession
• • 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
  • B65B21/00—Packaging or unpacking of bottles
  • B65B21/24—Enclosing bottles in wrappers
  • B65B21/245—Enclosing bottles in wrappers in flexible wrappers, e.g. foils
• • 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
• • 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
  • B65B61/10—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 using heated wires or cutters

Definitions

• the present invention relates to a cutting method and unit in a packaging machine in extensible film.
• a film made of heat-shrinkable plastic material is currently most commonly used. After being wound around the product or group of products, this film provides that a cutting and welding device separates a single packaging which is subsequently treated in a heat-shrinking oven which stabilizes the packaging so as to stably withhold the products contained therein.
• a further problem is connected to the times for reaching the finished packaging of products as the products or groups of products are spaced in order to be packaged in the manner described above. If, alternatively, a film of extensible plastic material is used, which is spirally wound around the products that are moved forwards according to a horizontal direction, the cutting step is currently always effected with cutting devices of the cutting and welding type indicated above. These cutting devices do not involve rapid intervention times.
• packaging in film of extensible plastic material eliminates the necessity of a heat-shrinking oven and the relative energy costs and also allows the use of a thinner film, the current cutting and welding device is not satisfactory as it considerably slows down the packaging.
• WO 2015/040565 discloses equipment used for the packaging of bottles with a thin film made of extensible plastic material which is spirally wound around the bottles fed consecutively in continuous.
• the equipment has a cutting station on a slide which intervenes to effect cuts on the bundle thus formed.
• the general objective of the present invention is to provide a cutting method and unit in a packaging machine of products in extensible film, that is capable of solving the drawbacks of the known art indicated above in an extremely simple, economical and particularly functional manner.
• a further objective of the present invention is to provide a cutting method and unit in a packaging machine that can eliminate slowdowns in the packaging, increasing the production of finished packagings .
• Another objective of the present invention is to provide a cutting unit in a packaging machine of products in an extensible film that is capable of reducing the costs relating to the packaging material.
• FIG. 1 is a raised side view illustrating a packaging machine of products in extensible film in which a cutting unit according to the invention is provided;
• figure 2 is a plan view from above of the packaging machine of products in extensible film of figure 1 provided with the cutting unit according to the present invention ;
• figure 3 is a perspective view of the cutting unit according to the present invention.
• FIG. 4 is a raised side view showing the whole cutting unit forming part of the machine of figure 1 ;
• figures 5 and 6 are perspective views of part of the cutting unit shown in figure 4 ;
• figure 7 is a plan view from above of the cutting unit of the previous figures 4-6;
• FIGS. 8 and 9 show sectional views in correspondence with the cutting unit with the upper and lower blades and side blades respectively, in an operating position acting on the film of plastic material that is enveloping the products.
• a first observation to be made is that a cutting unit of the invention is particularly useful when the products are fed forwards in continuous juxtaposed one after another.
• said bottles are fed in pairs adjacent to each other and moved forwards on a feed conveyor.
• Said products 11, moreover, are contained, for example, wound in an extensible film in an intersection of layers of film spirally arranged to stabilize the packaging when finished, wherein said layers of film are superimposed and wound according to two opposite rotation directions.
• the film can also be traditionally arranged starting from a centre-folded film with the aid of devices that keep the film stably in a continuous packaging around the products contained therein .
• a packaging machine which comprises an ordering unit 13 that receives two continuous rows of adjacent bottles 11 from a conveyor belt 12 and keeps them thus ordered up to a first ring winding unit 14.
• the first ring winding unit 14 is then followed by a second ring winding unit 15, opposite the first unit 14, which effects a winding in an opposite direction with respect to the first winding unit 14 to produce a continuous packaging or bundle.
• the second winding unit 15 is in turn followed by a cutting unit 16 according to the invention, that separates the continuous packaging into finished groups of products 11, wound in the film of extensible plastic material and forming a final packaging 18.
• a cutting unit 16 must intervene in a packaging machine to separate a series of finished packagings 18 of a predetermined number of products 11 from a continuous packaging or bundle being fed forwards. In the figures, for example, this is effected to separate finished packagings 18, for example six bottles 11 in two adjacent pairs, from a continuous packaging or bundle moving forwards .
• the cutting unit 16 comprises a frame 50 which supports a side cutting device 51 and an upper and lower cutting device 52. According to the invention, in fact, the cutting unit 16 acts on the plastic material of continuous packaging wound around the bottles 11 to effect a transversal cutting of the perimeter of the continuous packaging or bundle that is moving forwards.
• the cutting is composed of four sections of the packaging, two vertical and two horizontal, which in fact form the perimeter of the continuous packaging or bundle .
• the frame 50 carries a slide 53, free to move forwards and backwards, bearing the side cutting device 51 and the upper and lower cutting device 52 on relative guides 67. Said slide 53 moves forwards and backwards beneath a conveyor belt 55 whose upper part is designed for being wound around end pulleys 54.
• the conveyor belt 55 supports the various pairs of bottles 11 previously arranged in the film to form the above- mentioned continuous packaging bundle which arrive wound in two layers of film, arranged spirally crossed while moving forwards.
• the conveyor belt 55 consequently accompanies the various pairs of bottles wound in the single packaging or continuous bundle during the complete cutting step.
• the side cutting device 51 provides a portal 56 containing two vertical side blades 57 movably positioned on horizontal guides 58 for moving forwards and backwards.
• the two vertical side blades 57 can be moved towards and away from the tubular plastic material wound around the bottles 11 to effect a cutting on two vertical sections of said continuous packaging on opposite sides of said continuous packaging or bundle.
• the vertical blades 57 are operatively subjected to potential difference and heated by the current which is consequently generated and passes through them thus operating with a hot cut or in any case with alternative systems such as ultrasounds, etc.
• the portal 56 is positioned astride on the continuous packaging or bundle of products 11 that moves forwards inside said cutting unit.
• the two vertical blades 57 are driven in this movement by a double crank mechanism 59, 59' , upper and lower, actuated by a single motor 60.
• the upper and lower cutting device 52 also provides a portal 61 containing two upper 62 and lower 62' horizontal blades movably positioned on horizontal guides 63 for moving forwards and backwards on a vertical plane.
• the two horizontal blades 62, 62' can be moved towards and away from the continuous packaging or bundle comprising two layers of film wound in an opposite direction around the products 11 to effect a cutting on two horizontal sections of said continuous packaging on opposite sides of the continuous packaging or bundle.
• the two horizontal blades 62, 62' are operatively subjected to potential difference and heated by the current which is consequently generated and passes through them therefore operating with a hot cut or in any case with alternative systems such as ultrasounds, etc.
• the two horizontal blades 62, 62' are driven in this movement by a double crank mechanism 64, 64', upper and lower, actuated by a single motor 65.
• the lower blade 62' in its forward and backward, upward and downward movement moves in an omega-shaped loop 66 formed in the belt 55, wherein said omega-shaped loop can be moved together with a slide 53 and with the upper and lower cutting device 52.
• Figures 8 and 9 respectively show sectional views in correspondence with the upper and lower cutting device 52 of the cutting unit 16 with the upper 62 and lower 62' horizontal blades and the side cutting device 51 with the vertical side blades 57 in an operational position acting on the film of plastic material that is being wound around the products.
• the reciprocal distance d between the two portals 56 and 61 of the two side 51 and upper and lower 52 cutting devices is variable and adjustable in the setting phase with both a variation in the dimensions of the bottles 11 or other products being packaged above all in the quantity of bottles 11 or products required in the final packaging to be obtained.
• adjustable struts/rods 68 connect the two portals 56 and 61 of the two cutting devices 51 and 52 so that the reciprocal distance can be varied and regulated.
• This new cutting method in a packaging machine of products 11 in extensible film fed forwards in continuous comprises a phase of feeding products wound in a continuous packaging or bundle of products to a cutting unit and cutting the continuous packaging, by means of the cutting unit, into finished groups of products 11 arranged in the above-mentioned extensible film.
• This method comprises the step of cutting the above-mentioned continuous packaging or bundle of products with at least one movable cutting device which is moved forwards at the same advance rate as the continuous packaging or bundle of products to be cut.
• the cutting step is implemented by effecting, in a new and original manner, with the at least one movable cutting device in movement, a transversal perimetric cutting of the continuous packaging or bundle of products that is moving forwards. This is followed by the step of bringing the movable cutting device back with respect to the continuous packaging or bundle of products that is moving forwards and effecting a new step analogous to the previous one.
• the method naturally comprises repeating these last two steps for the whole continuous packaging or bundle of products that is moving forwards for the number of times necessary for completing the packaging of all the desired products.
• the products such as bottles, are preferably ordered in two continuous rows of adjacent products 11.
• the perimetric cutting step is preferably implemented by effecting a cutting on four sections of the continuous packaging, two vertical and two horizontal, which form the perimeter of the continuous packaging .
• the complete perimetric cutting on the packaging or bundle is effected in two consecutive steps.
• Each step for cutting the continuous packaging or bundle of products that is moving forwards is effected simultaneously in two points of the packaging or bundle.
• the two points are arranged at the above-mentioned distance d from each other, that is equal to a finished packaging 18.
• the cutting is effected of two vertical sections and two horizontal sections are cut in a second point of the packaging or bundle so that by consecutively repeating this step of cutting the continuous packaging or bundle of products simultaneously in these two points, a finished packaging is created.
• the conveyor belt 55 of the cutting unit 16 supports and accompanies the continuous packaging or bundle during the complete cutting step.
• the slide 53 containing the two side 51 and upper and lower 52 cutting devices moves to correlate with the advance rate of the continuous bundle on the conveyor belt 55.
• the cutting is effected by the two devices when the relative rate between the slide 53 and bundle containing the bottles 11 is zero.
• the vertical side blades 57 of the side cutting device 51 act on a section of the continuous packaging or bundle, whereas the two upper 62 and lower 62' horizontal blades of the upper and lower cutting device 52 act on a different section of the continuous packaging or bundle.
• the completion and separation of the finished packaging is effected when, as the continuous bundle continues to move forwards, the slide 53 has brought the cutting devices 51 and 52 back, which in the meantime have become disengaged from the packaging.
• the slide is then reactivated in the advance direction of the continuous bundle returning to the same advance rate as the continuous bundle. It is in this situation, in fact, that the two cutting devices 51 and 52 re- operate and effect the respective perimetric vertical and horizontal cuts on the bundle in those sections where cuts had previously been effected in a different direction.
• the cutting of these further perimetric horizontal and vertical sections completes the perimetric cutting of the continuous packaging, separating the single packaging.
• the correct cutting of the continuous packaging to form finished packagings having the desired and required size is therefore effected by means of two repeated consecutive steps on the continuous packaging at a longitudinal distance equal to that of a finished packaging containing the desired number of products.
• a cutting method and unit are in fact provided with particularly reduced intervention times. Both the cutting method and the cutting unit advantageously use an extensible film which is particularly resistant and light with a considerable saving of material.
• One or more cutting units can also be provided, for example, within a packaging machine, with an increase in the hourly productivity.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Control Of Cutting Processes (AREA)
• Basic Packing Technique (AREA)
• Control And Other Processes For Unpacking Of Materials (AREA)
• Packages (AREA)

Priority Applications (11)

Applications Claiming Priority (2)

Publications (1)

Family

ID=55969270

Family Applications (1)

Country Status (14)

Cited By (1)

Families Citing this family (1)

Citations (7)

Family Cites Families (14)

• 2016
  • 2016-02-09 IT ITUB2016A000599A patent/ITUB20160599A1/it unknown
• 2017
  • 2017-02-07 CA CA3011648A patent/CA3011648C/en active Active
  • 2017-02-07 JP JP2018541631A patent/JP6912099B2/ja not_active Expired - Fee Related
  • 2017-02-07 CN CN201780010533.XA patent/CN108698726B/zh not_active Expired - Fee Related
  • 2017-02-07 TR TR2019/09294T patent/TR201909294T4/tr unknown
  • 2017-02-07 RS RS20190808A patent/RS59041B1/sr unknown
  • 2017-02-07 EP EP17706422.7A patent/EP3221222B1/en active Active
  • 2017-02-07 SI SI201730067T patent/SI3221222T1/sl unknown
  • 2017-02-07 WO PCT/EP2017/052663 patent/WO2017137403A1/en not_active Ceased
  • 2017-02-07 PL PL17706422T patent/PL3221222T3/pl unknown
  • 2017-02-07 BR BR112018015168-8A patent/BR112018015168B1/pt active IP Right Grant
  • 2017-02-07 US US16/067,038 patent/US10934043B2/en active Active
  • 2017-02-07 ES ES17706422T patent/ES2735214T3/es active Active
  • 2017-02-07 RU RU2018128953A patent/RU2725845C2/ru active

Patent Citations (7)

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