JP2001287284A - Bag making machine with laser machining apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag making machine with a laser beam machining appa ratus capable of forming a cut line in a cross sectional direction of a flow of a laminate and laser machining from any of front and rear surfaces of the laminate. SOLUTION: The bag making machine comprises a sheet feeder 1, a folding unit 3, a longitudinal thermal adhering unit 4, a lateral thermal adhering unit 5 and a cutter 7. In this case, the laminate is intermittently transferred by a positioning sensor 8 and drive rolls 9 to meet a design pitch, and a bag is made. A laser beam machining unit 2 capable of radiating a laser beam from any of front and rear surfaces of the laminate and having a laser generator 11 and a laser scanning unit 12 is installed between the sheet feeder 1 and the folding unit 3. Thus, an out line extended in a cross sectional direction of the flow of the laminate can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag making machine with a laser processing machine for manufacturing a packaging bag having a cut line for opening by laser irradiation.

[0002]

2. Description of the Related Art As a method of forming a score line in at least one layer of a multilayer film having a multilayer structure, as described in US Pat. No. 3,790,744, a laminate including at least one synthetic resin layer is known. A method of forming a linear cut line in at least one layer including a synthetic resin layer of a laminated film in a flow direction of the laminated film by irradiating a laser while the film is along a supporting roll. As described in Japanese Patent No. 24462, by irradiating a laminated film including at least one synthetic resin layer with a laser, a tear line is formed in which the continuous depth in the flow direction of the laminated film alternately becomes shallow. There are known methods.

However, the above-mentioned method is a method of forming a linear or dashed cut line continuous in the flow direction of the laminated film, and intermittently transports the laminated film to form a pattern formed on the laminated film. Since it is not possible to form a score line extending in the direction traversing the flow of the laminated film in register, the laminated film has an opening score line of a predetermined shape in which the laminated film is intermittently transferred and registered with the pattern. There is a disadvantage that it cannot be used by being attached to a bag making machine for making bags. In addition, in the case of a laminated film including a layer that reflects a laser such as an aluminum foil, a laminated film that irradiates a laser depending on whether the laser absorbing layer is laminated on the inner side or the outer side of the aluminum foil. However, there is a drawback that it is impossible to cope with the change in the aspect.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laser processing machine capable of forming a score line in the cross direction of the flow of a laminate and performing laser processing from any surface of the laminate. It is to provide a bag making machine.

[0005]

A sheet feeding section for supplying a laminate having a laser absorbing layer, a bending section for bending the laminate to form a predetermined shape, and a heat bonding section in a flow direction. A vertical thermal bonding portion for forming a thermal bonding portion, a horizontal thermal bonding portion for forming a thermal bonding portion in the cross direction of the flow, and a cut portion for cutting into individual bags, a positioning sensor and In a bag making machine that intermittently transfers the laminate in accordance with the pattern pitch by the drive roll and makes the bag,
A bag making machine with a configuration in which a laser processing unit consisting of a laser generator and a scanning device is installed between the paper feeding unit and the bending unit so that laser irradiation can form a cut line extending in the cross direction of the flow in the laminate. Machine,
An easy-opening bag can be produced in which a cut line for opening is formed in any shape suitable for the shape of the bag to be formed in the cross direction of the flow of the laminate by registering the pattern.

In the above-mentioned bag making machine with a laser processing function, the laser processing section is provided with a laser generator and a scanning device installed on one side of the laminate,
By changing the way of passing the guide rolls of the laminate, the running direction can be reversed, so that laser irradiation can be performed from any surface of the laminate, from any surface of the laminate. Since the cut line can be formed by irradiating the laser, the laser absorbing layer of the laminate is laminated on the inner surface side of the laser reflective layer when forming the cut line in the laminate including the laser reflective layer such as aluminum foil. In this case, a score line can be formed in the laser absorbing layer of the laminate regardless of whether the laminate is laminated on the outer surface side.

In the above bag making machine with a laser processing function, the laser processing section comprises a laser generator, two scanning devices, a fixed reflector and a movable reflector.
Each scanning device is installed on both sides of the running laminate, and the laser from the laser generator can be sent to any of the scanning devices by moving the movable reflector. In this way, a laser beam can be irradiated from any surface of the laminate to form a score line.When forming a score line in a laminate including a laser reflection layer such as an aluminum foil, the laser absorption layer is Even if it is laminated on the inner surface side of the reflective layer or on the outer surface side,
A score line can be formed in the laser absorbing layer of the laminate.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a state in which a cut line is formed by irradiating a laser from the inner surface side of the laminate in the first embodiment, and FIG. 2 is a diagram showing a state in which a laser is irradiated from the outer surface side of the laminate in the first embodiment. FIG. 3 is a schematic diagram showing a state in which a line is formed, FIG. 3 is a schematic diagram showing a state in which a laser is irradiated from the inner surface side of the laminate in the second embodiment to form a cut line, and FIG. FIG. 5 is a schematic view showing a state in which a cut line is formed by irradiating a laser from the outer surface side of FIG. 5, FIG. 5 is a plan view showing a laminate in which the cut line is formed, and FIG. 6 is a bag made from the laminate shown in FIG. A perspective view showing
FIG. 7 is a cross-sectional view showing a laminate in which a cut line is formed by irradiating laser from the inner surface side, and FIG. 8 is a cross-sectional view showing a laminate in which a cut line is formed by irradiating laser from the outer surface side.
Is a paper feeding section, 2, 2 'is a laser processing section, 3 is a bending section,
4 is a vertical thermal bonding part, 5 is a horizontal thermal bonding part, 6
Is a notch forming part, 7 is a cutting part, 8 is a positioning sensor, 9
Is a drive roll, 11 is a laser generator, 12, 12a and 12b are scanning devices, 13a and 13b are fixed reflectors, 14 is a movable reflector, 15, 16a, 16b, 17, and 18 are guide rolls, and 21 is an outer layer , 22, 24, and 26 are adhesive layers, 23 is an aluminum foil layer, 25 is a laser absorbing layer, 27 is a thermoadhesive resin layer, 31 is a score line, 32
Denotes a notch, 33 denotes a vertical heat bonding portion, 33 ′ denotes a vertical heat bonding region, 34 denotes a horizontal heat bonding portion, 34 ′ denotes a horizontal heat bonding region, and 35 denotes a cut line.

A bag making machine with a laser processing function according to a first embodiment of the present invention is a bag making machine for making gusset pillow type bags as shown in FIGS. The laser processing section 2 includes a laser processing section 2, a bending section 3, a vertical thermal bonding section 4, a horizontal thermal bonding section 5, a cut forming section 6, a cutting section 7, a positioning sensor 8, and a driving roll 9. In part 2, a laser generator 11 and a laser scanning device 12 are installed, and in order to be able to irradiate a laser from any surface of the laminate, the laser irradiation unit reverses the running direction of the laminate. Guide roll 15 and guide roll 16a and guide roll 16b
, A guide roll 17 and a guide roll 18 are arranged.

In order to form a cut line by irradiating a laser from the inner surface side of the laminate, as shown in FIG. 1, the laminate is fed from a paper feed unit 1 with the inner surface facing upward, and the laser is fed. Guide roll 15 and guide roll arranged in processing section 2
16b, the guide roll 17 and the drive roll 9 are sequentially moved to the bending section 3. In the laser processing unit 2, the laminated body is registered intermittently at a predetermined position by registering the pattern of the laminated body with the positioning sensor 8 and the driving roll 9, and the laminated body is moved downward through the guide roll 15. In the flowing state, the laser from the laser generator 11 is scanned by the scanning device 12 on the inner surface side of the laminate,
A cut line having a predetermined shape including a direction crossing the flow is formed at a predetermined position registered with the pattern formed on the laminate. After the score line is formed, the bag is formed through the bent forming section 3, the vertical thermal bonding processing section 4, the horizontal thermal bonding processing section 5, the cut forming section 6, and the cutting section 7.

In order to form a cut line by irradiating a laser from the outer surface side of the laminate, as shown in FIG. 2, the laminate is fed from a paper feed unit 1 with the inner surface facing upward, and laser processing is performed. The guide roll 16a, the guide roll 15, the guide row 18, the guide row 17, and the drive roll 9 arranged in the section 2 are sequentially moved to the bending section 3. In the laser processing unit 2, the laminate is registered intermittently at a predetermined position by registering the pattern with the positioning sensor 8 and the drive roll 9, and the laminate is moved upward through the guide roll 16a. On the outer surface of the laser, the laser from the laser generator 11 is scanned by the scanning device 12,
A cut line having a predetermined shape is formed at a predetermined position. After the score line is formed, the bag is formed through the bent forming section 3, the vertical thermal bonding processing section 4, the horizontal thermal bonding processing section 5, the cut forming section 6, and the cutting section 7.

A bag making machine with a laser processing function according to a second embodiment of the present invention is a bag making machine for making gusset pillow type bags as shown in FIGS. A laser processing section 2 ′, a bending section 3, a vertical thermal bonding section 4, a horizontal thermal bonding section 5, a cut forming section 6, a cutting section 7, a positioning sensor 8, and a driving roll 9; The processing section 2 'includes a laser generator 11, two scanning devices 12a and a scanning device 12b, and two fixed reflectors.
13a, a fixed reflector 13b, and a movable reflector 14 are provided, and guide rolls 16, 15, 15, 18, and 17 are provided.

In the second embodiment, in order to form a cut line by irradiating a laser from the inner surface side of the laminated body, as shown in FIG. 3, the laminated body is supplied from the paper feeding unit 1 so that the inner surface faces upward. The paper is transported to the bending section 3 by passing through the guide roll 16, the guide roll 15, the guide roll 18, the guide row 17, and the drive roll 9 in this order. In the laser processing section 2 ', the laminate is intermittently stopped at a predetermined position by registering the pattern of the laminate with the positioning sensor 8 and the drive roll 9 so that the laminate moves between the guide roll 15 and the guide roll 18. In the state of flowing horizontally, the inner surface side of the laminate is irradiated with laser by the scanning device 12a installed at the top, and the cut line of the predetermined shape including the direction crossing the flow is at the predetermined position aligned with the pattern It is formed. In the laser processing section 2 ′, the laser from the laser generator 11 is reflected by the fixed reflector 13a and the fixed reflector 13b and sent to the scanning device 12a installed above. At that time, the movable reflecting plate 14 has been moved to a position outside the laser path. In a state where the laminate is horizontally flowing between the guide rolls 15 and the guide rolls 18, a laser beam is scanned and irradiated by the upper scanning device 12a to form a score line from the inner surface side of the laminate.

In the second embodiment, a method of forming a cut line by irradiating a laser from the outer surface side of the laminate is as shown in FIG. 4, and forming a cut line by irradiating the laser from the inner surface side of the laminate. In the same manner as in the case where the laminate is horizontally flowing between the guide roll 15 and the guide roll 18, the laser is irradiated by the scanning device 12b installed at the lower portion, and the flow of the laminate from the outer surface side of the laminate is performed. Is formed in a predetermined shape including a direction crossing the line. in this case,
In the laser processing section 2 ′, the laser from the laser generator 11 is reflected by the fixed reflector 13 a and the movable reflector 14 and sent to the lower scanning device 12 b, so that the movable reflector 14 is positioned in the laser path. Has been moved to.

FIG. 5 is a plan view of an example of a laminated film in which a score line is formed in a laser processing portion of the bag making machine with a laser processing function according to the embodiment. This embodiment is for making a gusset pillow type bag shown in FIG. 6, and both sides of a continuous laminated body are respectively formed as vertical heat bonding areas 33 'having a predetermined width, and the length of the bag in the vertical direction is set. A cut line 35 is provided at a position corresponding to the cut line 35, and both sides of the cut line 35 are defined as a horizontal heat bonding area 34 'having a predetermined width. Line 31 that projects upward at the center in the direction crossing
Are formed.

The laminated body in which the cut line 31 shown in FIG. 5 is formed in the laser processing section is formed by the bent forming section 3, the vertical thermal bonding processing section 4 and the horizontal thermal bonding processing section 5, and After the cut 32 is formed at the edge of the laminate where the cut line 31 is formed in the cut forming section 6, the cut is cut at the position of the cut line 35 in the cutting section 7, as shown in FIG. A gusset pillow having a configuration in which notch lines 31 extending to both sides from a cut 32 formed at a side end of the vertical heat bonding portion 33 are formed while being thermally bonded at the vertical heat bonding portion 33 and the horizontal heat bonding portion 34. It becomes a type bag. The gusset pillow type bag shown in FIG. 6 can be easily opened by tearing the laminate along the cut line 31 by grasping and pulling both sides of the cut 32 at the side end of the vertical heat bonding portion 33. is there.

The laminated body with the score lines shown in FIG. 5 is for making a gusset pillow type bag. Regarding the shape of the bag to be made, a flat pillow type bag other than the gusset pillow type bag is used. A side seal bag, a four side seal bag, and a self-supporting bag can also be used. In this case, a score line can be formed in an arbitrary shape at an arbitrary position necessary to cut and open the bag. .

As shown in FIG. 7, for example, as shown in FIG. 7, an outer layer 21, an adhesive layer 22, an aluminum foil layer 23, an adhesive layer 24, a laser Absorbing layer 25, adhesive layer 26, and thermal adhesive resin layer 27
Are laminated, and a carbon dioxide laser absorption layer 25 is laminated on the inner surface side of the aluminum foil layer 23. In the case of this laminate, a cut line 31 is formed in the carbon dioxide gas laser absorbing layer 25 laminated on the inner surface side of the aluminum foil layer 23 by irradiating a laser from the inner surface side of the laminate. Even when a laser is irradiated from the inner surface side of the laminate, the adhesive layer 24, the adhesive layer 26, and the heat-adhesive resin layer 27 are layers made of a polyolefin resin and hardly absorb the laser, so that no cut line is formed. In the laminated body shown in FIG.
Even if 31 is formed, since the laser absorbing layer 25 is on the inner surface side of the aluminum foil layer 23, the cut line 31 is not conspicuous from the outer surface of the laminated body and does not impair the design.

As shown in FIG. 8, for example, as shown in FIG. 8, an outer layer 21, an adhesive layer 22, a laser absorbing layer 25, an adhesive layer
24, aluminum foil layer 23, adhesive layer 26, and thermo-adhesive resin layer 27
Are stacked. In this case, a laser beam is irradiated from the outer surface side of the laminate to form a score line 31 in the carbon dioxide laser absorption layer 25 laminated on the outer surface side of the aluminum foil layer 23. By forming the outer surface layer 21 and the adhesive layer 22 with a polyolefin-based resin, even if a laser beam is irradiated from the outer surface side of the laminate, the laser beam is hardly absorbed, so that no cut line is formed.

As the laser absorbing layer of the laminate, biaxially stretched polyethylene terephthalate, biaxially stretched nylon,
Axial stretching polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polycarbonate and the like can be used. As a laser, a carbon dioxide gas laser having a wavelength of 10.6 μm is generally used. However, the above-mentioned resin easily absorbs the carbon dioxide gas laser, condenses the carbon dioxide gas laser and irradiates the film surface with the light. Thereby, the irradiated portion of the film is removed by being heated, melted, decomposed and removed, so that a score line can be formed. As the heat-adhesive resin layer, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer and the like can be used. Also, as the adhesive layer, urethane-based adhesive, polyethylene,
An ethylene-acrylic acid copolymer or the like can be used. Since these resins have a property of transmitting a carbon dioxide laser without absorbing them, no cut line is formed. As the outer layer, biaxially oriented polypropylene can be used when irradiating laser from the outer side, and biaxially oriented polypropylene, biaxially oriented polyethylene terephthalate, biaxially oriented nylon, etc. when irradiating laser from the inner side. Can be used.

As a structure of the laminate forming a score line from the inner surface side, for example, biaxially stretched polyethylene terephthalate (PET) 12 μm / dry lamination (DL)
/ Aluminum foil (AL) 7 μm / Extruded polyethylene (EC) 30 μm / PET 12 μm / Linear low density polyethylene (LLDPE) 40 μm, PET 12 μm / EC
15μm / AL7μm / EC20μm / biaxially stretched nylon
(ON) 15 μm / LLDPE 40 μm , PET12
μm / EC15μm / AL7μm / EC20μm / PE
T12μm / polypropylene 30μm, PET12μm
/ EC15μm / AL7μm / EC20μm / ON15
μm / DL / polypropylene 30 μm. Also,
As a configuration of a laminate forming a score line from the outer surface side,
For example, OPP20μm / EC20μm / PET12μ
m / EC20μm / AL7μm / EC20μm / LLD
PE 40 μm, OPP 20 μm / DL / ON 15 μm /
EC20μm / AL7μm / EC20μm / LLDPE
40 μm, PET 12 μm / EC 20 μm / AL7 μm
/ EC 20 μm / LLDPE 40 μm. A cut line is formed by a carbon dioxide gas laser on the underlined layer of the laminate.

The conditions for forming a cut line by irradiating a laser beam on the laser absorption layer of the laminate having the above-mentioned structure are as follows: a carbon dioxide laser having a wavelength of 10.6 μm, an output of 50 W, a pulse duration of 50 μsec, a repetition of 200 μsec, a pulse Width 5
A cut line can be formed under the conditions of 0 μsec and a scan speed of 1000 to 1500 mm / sec.

[0023]

According to the present invention, a sheet feeding section for supplying a laminate having a laser absorbing layer, a bent section for bending the laminate to form a predetermined shape, and a heat bonding section in a flow direction are formed. A vertical thermal bonding section, a horizontal thermal bonding section for forming a thermal bonding section in the cross direction of the flow, and a cut section for cutting into individual bags. In a bag making machine that intermittently transports the laminated body according to the pitch and forms a bag, a laser processing unit consisting of a laser generator and a scanning device is installed between the paper feeding unit and the bending unit, and the laser is laminated by laser irradiation A bag making machine having a configuration in which a score line extending in the transverse direction of the flow can be formed on the body is suitable for the shape of the bag to be made in the transverse direction of the flow of the laminated body in register with the pattern. Of any shape It can be manufactured easily openable bag forming a score line for sealing.

In the above-mentioned bag making machine with a laser processing function, the laser processing section is provided with a laser generator and a scanning device installed on one side of the laminate,
By changing the way of passing the guide rolls of the laminate, the running direction can be reversed, so that laser irradiation can be performed from any surface of the laminate, from any surface of the laminate. Since the cut line can be formed by irradiating the laser, the laser absorbing layer of the laminate is laminated on the inner surface side of the laser reflective layer when forming the cut line in the laminate including the laser reflective layer such as aluminum foil. In this case, a score line can be formed in the laser absorbing layer of the laminate regardless of whether the laminate is laminated on the outer surface side.

In the above-described bag making machine with a laser processing function, the laser processing section comprises a laser generator, two scanning devices, a fixed reflector and a movable reflector.
Each scanning device is installed on both sides of the running laminate, and the laser from the laser generator can be sent to any of the scanning devices by moving the movable reflector. In this way, a laser beam can be irradiated from any surface of the laminate to form a score line.When forming a score line in a laminate including a laser reflection layer such as an aluminum foil, the laser absorption layer is Even if it is laminated on the inner surface side of the reflective layer or on the outer surface side,
A score line can be formed in the laser absorbing layer of the laminate.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state in which a laser beam is irradiated from the inner surface side of a laminate to form a score line in a first embodiment.

FIG. 2 is a schematic view showing a state in which a laser beam is irradiated from the outer surface side of the laminate to form a cut line in the first embodiment.

FIG. 3 is a schematic view showing a state in which a laser beam is irradiated from the inner surface side of the laminate to form a cut line in the second embodiment.

FIG. 4 is a schematic view showing a state in which a laser beam is irradiated from the outer surface side of the laminate to form a cut line in the second embodiment.

FIG. 5 is a plan view showing a laminate in which a score line is formed.

FIG. 6 is a perspective view showing a bag made from the laminate shown in FIG. 5;

FIG. 7 is a cross-sectional view showing a laminate in which a cut line is formed by irradiating a laser from the inner surface side.

FIG. 8 is a cross-sectional view showing a laminate in which a cut line is formed by irradiating a laser from the outer surface side.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 paper feed section 2, 2 ′ laser processing section 3 bending section 4 vertical thermal bonding section 5 horizontal thermal bonding section 6 cut forming section 7 cutting section 8 positioning sensor 9 drive roll 11 laser generator 12 12a, 12b Scanning device 13a, 13b Fixed reflector 14 Movable reflector 15, 16a, 16b, 17, 18 Guide roll 21 Outer surface layer 22, 24, 26 Adhesive layer 23 Aluminum foil layer 25 Laser absorption layer 27 Thermal adhesive resin layer 31 Cut line 32 Cut 33 Vertical thermal bonding area 33 'Vertical thermal bonding area 34 Horizontal thermal bonding area 34' Horizontal thermal bonding area 35 Cut line

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B31B 23/14 B31B 23/14 F-term (Reference) 3E075 BA42 BA70 CA02 DB19 DD13 DD42 DD45 GA02 4E068 AE00 CA09 CD11 CE02 CF03 DB14

Claims (3)

[Claims] 1. A sheet feeding section for supplying a laminate having a laser absorbing layer, a bent section for folding the laminate to form a predetermined shape, and a heat bonding section in a flow direction. A vertical thermal bonding section, a horizontal thermal bonding section for forming a thermal bonding section in the cross direction of the flow, and a cut section for cutting into individual bags. In a bag making machine that intermittently transports a laminate in accordance with a pitch to form a bag, a laser processing unit including a laser generator and a scanning device is installed between the paper feeding unit and the bending unit, and laser irradiation is performed. A bag making machine with a laser processing machine, characterized in that a cut line extending in the cross direction of the flow can be formed in the laminate by using the above method. 2. The running direction can be reversed by installing a laser processing device and a scanning device on one of the surfaces of the laminate, and changing a guide roll of the laminate. 2. The bag making machine with a laser processing machine according to claim 1, wherein the laser irradiation can be performed from any surface of the laminate. 3. The laser processing part comprises a laser generator, two scanning devices, a fixed reflector and a movable reflector, and is installed on both sides of the laminate running on the two scanning devices. 2. A bag making machine with a laser processing machine according to claim 1, wherein the laser beam from the laser generator can be sent to any of the scanning devices by moving the movable reflector. Machine.