EP3621884B1 - Device for applying pre-glued sheets of paper to paper or cardboard boxes - Google Patents
Device for applying pre-glued sheets of paper to paper or cardboard boxes Download PDFInfo
- Publication number
- EP3621884B1 EP3621884B1 EP18730850.7A EP18730850A EP3621884B1 EP 3621884 B1 EP3621884 B1 EP 3621884B1 EP 18730850 A EP18730850 A EP 18730850A EP 3621884 B1 EP3621884 B1 EP 3621884B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- box
- rotating brush
- support
- walls
- 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
Links
- 239000000123 paper Substances 0.000 title claims description 36
- 239000011111 cardboard Substances 0.000 title claims description 19
- 239000011087 paperboard Substances 0.000 title claims description 18
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000012937 correction Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- B65B49/00—Devices for folding or bending wrappers around contents
- B65B49/08—Reciprocating or oscillating folders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/26—Folding sheets, blanks or webs
- B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2120/00—Construction of rigid or semi-rigid containers
- B31B2120/50—Construction of rigid or semi-rigid containers covered or externally reinforced
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Description
- The invention refers to a device for applying sheets of pre-glued paper to paper or cardboard boxes, in particular a system to allow the application of pre-glued paper to the side or bottom walls of the box, which prevents the formation of air bubbles.
- Traditionally, the sequence of application of sheets of pre-glued paper to paper or cardboard boxes, called "wrapping", provides for a single pressing step designed only to make the wrapped paper adhere to the box.
- This may cause entrapment of air bubbles below the coating paper.
- A similar defect may also occur on the coated bottom of the box, caused by a low pressure force of the "under mould" pump against the box itself.
- The standard configuration of the heads of the coating machine provides for the anchoring of the sheet spreading brushes directly on the head itself rather than on its base, thus linking the vertical movement of one to the that of the other, and thus fixing the distance that separates the "wrapping" assembly from the brush itself, thus forcing the rod, even for low boxes, to descend beyond what is necessary to reach the press and the strip, resulting in the loss of productivity of the machine.
- Moreover, in the case of boxes with more than one height, the heads, in fact, must be at different heights but, in this case, the brushes will also be forced to follow this configuration, which is not optimal for "rolling up".
- In fact, at the state of the art there are numerous systems known for the forming paper or cardboard boxes, and in particular for covering the box with sheets of pre-glued paper
- In particular,
WO2015079342 describes a machine and a method for covering paper or cardboard boxes comprising a vertical movable plane supporting the sheet and the box, means for folding the sheet on the box and the contact plates positioned outside the box, to prevent the sides of the box and the sheet pressing elements on the walls of the box from moving outwards, the sheet pressing elements being movable with respect to the plates so as to allow, in contrast with the contact plates, the folding and adhesion of the sheet of paper to the box. - From
WO2013098682 it also known a device for applying sheets of pre-glued paper to cardboard boxes in which a rotating brush is provided for folding the vertical outer flaps of the sheet beyond the walls of a box, and a support for a horizontal strip is provided for folding the horizontal outer flaps. In order to cover the box walls, an horizontal presser is configured to apply the pre-glued sheets to the walls of the box, while a top holder is vertically movable to insert a counter-mould in the box and to wrap the external flaps of the folded sheet on the internal walls of the box - However, there is no way of preventing bubbles from forming and, in particular, the method utilized does not prevent it.
- It is therefore felt the need for a device for applying sheets of pre-glued paper to paper or cardboard boxes, in particular a system to allow the application of pre-glued paper to the side or bottom walls of the box, which prevents the formation of air bubbles.
- These objects have been achieved by developing a device according to one or more of the appended claims.
- A first advantage is that the lack of mechanical connection elements in the system, between the press and the strip, allows wrapping sequences to remove the presence of bubbles below the paper coating, this is possible by performing a series of successive pressing of the wrapping paper, from top to bottom.
- A further advantage is that the system allows trapped air on the bottom to escape as it includes a "under mould" pump, a single or multistage telescopic cylinder, that is in contrast to the mould and pushed down by it in its work cycle; during this step, the valve that controls the air inlet and outlet from the pump is never unloaded, so as to compress the air inside the cylinder, thus increasing its pressure and, therefore, the force against the box, so as to allow the trapped air to escape.
- Advantageously, in addition to increasing the force that the pump exerts on the box, the pressure produced is fed back into the machine circuit, producing a boost-pressure throughout the circuit so as to increase the overall performance of all pneumatic actuators.
- A further advantage is that the system allows the independent adjustment of the pressing height of each head allowing, in turn, to realize boxes with multiple heights independent of the orientation of the sheet on the mat, this is because the high brush is supported by a structure anchored to the base of the head itself, and this allows it to remain at the optimum height (that of the mat) despite the head is free to move vertically.
- A further advantage is that the system provides a mechanical bond that connects the rotating brushes to the heads and then, in addition to keeping them at the optimum level, allows to control its movement depending on the type of product being processed, so that, for example, by means of appropriate interpolations, countersunk boxes having walls not perpendicular to the base can be realized.
- These and other advantages will be better understood by anyone skilled in the art from the following description and the accompanying drawings, given as a non-limiting example, wherein:
-
fig. 1 shows an overview of the device; -
fig.1a shows a detail in side view of the device offig.1 ; -
fig.2a shows the beginning of the sequence of covering the box operated by the device infig. 1 with the pre-glued sheet of paper placed under the paper or cardboard box; -
fig.2b shows the first step of the covering sequence of the box operated by the device infig. 1 with the pre-glued sheet of paper adhering to the walls of the paper or cardboard box; -
fig.2c shows the second step of the covering sequence of the box operated by the device infig. 1 with the pre-glued sheet of paper adhering to the upper edges of the paper or cardboard box; -
fig.2d shows the last step of the covering sequence of the box operated by the device infig. 1 with the pre-glued sheet of paper adhering to the internal edges of the paper or cardboard box; -
fig.2e shows the formation of a vertical bubble between the sheet of pre-glued paper and the box of paper or cardboard; -
fig.2f shows the formation of a horizontal bubble between the pre-glued sheet of paper and the paper or cardboard box. -
fig. 3 shows a general scheme of a wrapping device of the known type. -
fig.4a, 4b show respectively a perspective and side view of an embodiment of the invention. - With reference to the attached drawings, a preferred embodiment of a device for applying sheets of pre-glued paper to paper or cardboard boxes is described, in particular a system to allow the application of pre-glued paper to the side or bottom walls of the box, which prevents the formation of air bubbles according to the invention.
-
Figure 3 shows in general the structure of a coating machine provided with a device of the type described later in greater detail, and which includes abase 13 supporting a coating sheet F, supported by a upright 6 and vertically movable between operating heads R provided with brushes that apply the sheet on the walls of the box, and vertical and horizontal blades for folding the edges of the sheet protruding sideways the box. - In the illustrated scheme, which is a traditional type per se, the sheet is rolled up onto the internal walls of the box by means of a counter-mould C moved vertically by an upper shaft A that enters the box S, resting on
plane 13, dragging the flaps of the sheet folded inwards by the horizontal folding blades. - The device comprise at least one operating unit or head R, preferably at least two, each provided with,
- a
brush 1, horizontally movable, supported by a brush support 7 fixed in relation to thebrush 1, - means 2a and 2b for folding the vertical outer flaps of the sheet beyond the box walls,
- a
support 3 for ahorizontal strip 14 for folding the horizontal outer flaps, - a presser 4 horizontally movable and configured to exert pressure on box S for adhesion of the pre-glued sheet of paper F to the walls of the paper or cardboard box,
- a top mould holder shaft A vertically movable configured to insert a counter-mould C in the said box S and to wrap the external flaps of the folded sheet on the internal walls of the box,
- a plate supporting the
sheet 13 vertically movable to act against the counter-mould C. - According to the invention, the device includes a height-adjustable presser holding head 5 independent of said brush support 7 and of said
support 3 for saidhorizontal strip 14, in order to allow the independent adjustment of the pressing height of the head 5 independent of the height of the rotatingbrushes 1 and to allow the coating of boxes with multiple heights. - In a preferred embodiment, the support 7 of the
brush 1 is anchored to abase 20 of said presser holding head 5, so that it can remain at an optimum work height and head 5 is free to move vertically independently. - In addition, the
brush 1 can be conveniently carried by amovable arm 15, which in turn is attached to support 3, provided with a movement axis (a) inclined at an angle (alpha), preferably 45°, to the vertical, in order to adapt and press at a favourable angle on the sides of the box S both vertically and horizontally. - Preferably, the
plate 13 is supported below by a single or multistage telescopic cylinder 6 configured to be against to the counter-mould C in order to allow wrapping sequences suitable for removing the presence of bubbles below the coating paper. - In order to be able to cover also countersunk or curved boxes i.e. having walls not perpendicular to the base, it is possible to provide a
motor 21 of the support 7 of thebrush 1 and means 22 for controlling themotor 21 configured to control its movement according to the type of box being processed. - Preferably, the device is provided with several operating units R, each with
motors 21 independent of the others, and acontrol unit 22 for their management. - Advantageously, the lack of mechanical connecting elements between presser 4 and
strip 14 allows for wrapping sequences to remove the presence ofbubbles 10, 12 below the coating paper. - This is achieved by a series of successive presses of the wrapping paper from top to bottom.
- The pressing sequence is illustrated in
Fig.2a, 2b, 2c and 2d with the subsequent folding of the pre-glued sheet of paper from a flat position to a first adhesion on the walls made bybrush 1, and a subsequent folding towards the inside of the box, made by the horizontal blades. - Another mechanism to remove
air bubbles 10,12 is that of the "under mould" pump 6, single or multistage telescopic cylinder, which is put against to the mould and thrust down by it in its working cycle. - During this step, the valve that controls the air inlet and outlet from the "under mould" pump 6 is never unloaded, so as to compress the air inside the cylinder, thus increasing the pressure and, therefore, the force against the box, so as to allow the
trapped air 10,12 to escape. - The
high brush 1 is supported by a structure anchored to the base of the head itself, so as to allow it to remain at the optimum level, that of the mat, despite the head is free to move vertically. - This allows the independent adjustment of the pressing height of each single head allowing, in turn, to realize boxes with multiple heights regardless of the orientation of the sheet on the mat.
- The mechanical constraint that connects the rotating
brushes 1 to the heads, in addition to keeping them at the optimum height, allows to control its movement depending on the type of product being processed, so that, for example, by means of appropriate interpolations, countersunk boxes having walls not perpendicular to the base can be realized. - According to an advantageous aspect of the invention, the wrapping heads R are moved in an integrated way with the processing process, in order to adapt to the shape and size of the box to be produced.
- In particular, the position of the wrapping heads is continuously recalculated dynamically, in order to be able to make changes in real time of all corrections applied to the on-going processing, i.e., to be able to make precise changes to the theoretically calculated operating parameters.
- More generally, according to the invention, the actuators responsible for the moving axes of the machine during the work process act themselves to adapt in real time the position and movements of the operating heads according to the format of the product to be worked and the working step, thus making any change of format during the same process in progress and moving the work components (such as the moving brushes horizontally and the moving press vertically) in accordance with the new format to be worked and the work step in progress, without interruption and machine downtime.
- The displacements of the actuators are calculated cycle by cycle to ensure that the machine can adapt in real time to the needs of production, while eliminating machine downtime due to adjustment operations and reducing the waste due to the delay in the correction intervention compared to the identification of the problem.
- With reference to
Figure 4a, 4b , a preferred embodiment of the device of the invention is illustrated. - In order to help the tensioning of the coating paper F along the external vertical walls of the box S, at the top of each wrapping head, aligned with the rotating
brush 1, apneumatic suction cup 25 was inserted operating with the Bernoulli's principle, as shown in figure attached 4. - This suction cup, activated in an appropriate way during the working cycle, emits an
air flow 26 that pretensions the covering paper F in such a way that it perfectly follows the path of the rotating brush 1 (pre-aligned) on the box S, preventing the imperfections of the covering (e.g. bubbles) thanks to the progressive and controlled application of the paper along the walls. In an advantageous way, thesuction cup 25 works without direct contact with the paper and therefore without causing scratches on the coating sheet F itself. - In different embodiments, the
suction cup 25 can be a separable component or a component integral with the operating head. - The present invention has been described according to preferred embodiments, however equivalent variants can be conceived without departing from the scope of the present invention.
Claims (9)
- Device for applying sheets (F) of pre-glued paper to the walls of paper or cardboard boxes (S), comprising- at least one operating unit (R) provided with,a rotating brush (1), supported by a brush support (7) fixed in relation to the rotating brush,means (2a) and (2b) for folding the vertical outer flaps of the sheet beyond the box walls,a support (3) for a horizontal strip (14) for folding the horizontal outer flaps,a presser (4) horizontally movable and configured to exert pressure on the box (S) for adhesion of the pre-glued sheet of paper (F) to the walls of the paper or cardboard box,- a top mould holder shaft (A) vertically movable configured to insert a counter-mould (C) in the said box (S) and to wrap the external flaps of the folded sheet on the internal walls of the box,- a plate supporting the sheet (13) vertically movable to act against the mould (C)characterized in that is comprisesa horizontal motor (21) of the support (7) of an horizontally movable, rotating brush (1),means (22) for controlling the motor (21),a height-adjustable presser holding head (5) independent of said brush support (7) and of said support (3) for said horizontal strip (14), in order to allow the independent adjustment of the pressing height of the head (5) independent of the height of the rotating brushe (1) and to allow the coating of boxes with multiple heights.
- Device according to claim 1, in which said support (3) of the rotating brush (1) is anchored to a base (20) of said presser holding head (5), so that it can remain at an optimum working height and the head (5) is free to move vertically independently.
- Device as defined in claim 1 or 2, comprising a single or multistage telescopic cylinder (6) supporting said plate (13), configured to be put against the counter-mould (C) in order to allow wrapping sequences to remove the presence of bubbles below the wrapping paper, said cylinder (6) never being unloaded when the mould is descending, so that the pressure produced is fed back into the machine circuit, producing a boost-pressure throughout the pneumatic circuit, in order to increase the efficiency of all the pneumatic actuators connected to the circuit.
- Device according to one of the previous claims, in which said rotating brush (1) is carried by a movable arm (15) of an axis (a) inclined by an angle (α), preferably 45°, with respect to the vertical, in order to press at a favourable angle on the sides of the box (S) both vertically and horizontally.
- Device according to one of the previous claims, comprising a motor (21) of the support (7) of the rotating brush (1) and means (22) for controlling the motor (21) configured to control its movement according to the type of box being processed, in order to cover also countersunk or curved boxes, with walls not perpendicular to the base.
- Device according to one of the previous claims, comprising a pneumatic suction cup (25) placed in a position aligned with the rotating brush (1) to emit an air flow (26) which pretensions the covering paper (F) so that it follows the path of the rotating brush (1).
- Method for applying sheets (F) of pre-glued paper to the walls of paper or cardboard boxes (S) by means of a device of the type comprisingat least one operating unit (R) provided with a rotating brush (1), horizontally movable, supported by a brush support (7) fixed in relation to the rotating brush (1),at least one presser (4), horizontally and vertically movable, and configured to apply pressure to the box (S) to adhere the pre-glued sheet of paper (F) to the walls of the paper or cardboard box,characterized by the fact that the device further comprisea horizontal motor (21) of the support (7) of an horizontally movable rotating brush (1), andmeans (22) for controlling the motor (21),and by the fact that horizontal movement of the rotating brush (1) is controlled by means of interpolations, depending on the size of the box being processed, a height-adjustable presser holding head (5) independent of said brush support (7) and of said support (3) for said horizontal strip (14) being provided in order to allow the independent adjustment of the pressing height of the head (5) independent of the height of the rotating brush (1) and to allow the coating of boxes with multiple heights.
- Method according to claim 7, in which the position of the rotating brushe (1) is continuously recalculated dynamically in order to make precise changes to theoretically calculated operating parameters.
- Method according to claim 7, in which at least the horizontal movement of the rotating brush (1) and the vertical movement of the presser (4) are controlled independently to adapt in real time the position and the movements of the rotating brush and the presser according to the size of the product to be processed, during the same process in progress, in accordance with a new format to be processed, so as to operate each format change, without interruption and machine downtime.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102017000049325A IT201700049325A1 (en) | 2017-05-08 | 2017-05-08 | DEVICE FOR THE APPLICATION OF SHEETS OF PRE-GLUED PAPER WITH BOXES OF PAPER OR CARDBOARD. |
PCT/IB2018/053184 WO2018207089A1 (en) | 2017-05-08 | 2018-05-08 | Device for applying pre-glued sheets of paper to paper or cardboard boxes |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3621884A1 EP3621884A1 (en) | 2020-03-18 |
EP3621884B1 true EP3621884B1 (en) | 2023-08-30 |
EP3621884C0 EP3621884C0 (en) | 2023-08-30 |
Family
ID=59811997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18730850.7A Active EP3621884B1 (en) | 2017-05-08 | 2018-05-08 | Device for applying pre-glued sheets of paper to paper or cardboard boxes |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3621884B1 (en) |
IT (1) | IT201700049325A1 (en) |
WO (1) | WO2018207089A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109318533B (en) * | 2018-11-27 | 2024-02-27 | 广东高义包装科技股份有限公司 | Automatic internal connection paper pasting device for gift box |
CN112677561A (en) * | 2020-12-01 | 2021-04-20 | 周春龙 | Wine box bubble pressing mechanism and bubble pressing method |
CN113459589B (en) * | 2021-07-21 | 2022-12-06 | 哈尔滨和鑫彩色印刷有限公司 | Packaging carton manufacturing and processing method |
CN114379873A (en) * | 2022-03-02 | 2022-04-22 | 上海微松工业自动化有限公司 | Foam folding packaging mechanism for packaging core sheet material disc |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITBO20040408A1 (en) * | 2004-06-29 | 2004-09-29 | Emmeci S R L | COATING MACHINE FOR PACKAGING BOXES |
ES1060860Y (en) * | 2005-07-29 | 2006-03-01 | Olmos Telesforo Gonzalez | PRESSING DEVICE OF EARS OR SHEETS OF CARTON BOXES. |
ITBO20110770A1 (en) * | 2011-12-29 | 2013-06-30 | Emmeci Spa | PROCEDURE AND EQUIPMENT FOR COATING A BOX |
-
2017
- 2017-05-08 IT IT102017000049325A patent/IT201700049325A1/en unknown
-
2018
- 2018-05-08 EP EP18730850.7A patent/EP3621884B1/en active Active
- 2018-05-08 WO PCT/IB2018/053184 patent/WO2018207089A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP3621884A1 (en) | 2020-03-18 |
IT201700049325A1 (en) | 2018-11-08 |
EP3621884C0 (en) | 2023-08-30 |
WO2018207089A1 (en) | 2018-11-15 |
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