KR20230167940A - Laser marking machine and marking method of packaging material using the same - Google Patents

Abstract

The laser marking machine of the present invention includes a coating part that forms a coating surface on the packaging material, a packaging part that packages the contents in the packaging material on which the coating surface is formed, and a marking section that marks the packaging material in which the contents are packaged, and the packaging material has a coating surface on an outer portion. It is formed, and the coating surface is marked with a laser.

Description

Laser marking machine and packaging material marking method using the same {LASER MARKING MACHINE AND MARKING METHOD OF PACKAGING MATERIAL USING THE SAME}

The present invention relates to a laser marking machine and a method of marking packaging materials using the same. More specifically, it relates to a laser marking machine capable of clearly laser marking product information on the outer surface of packaging materials and a method of marking packaging materials using the same.

In general, packaging is necessary to produce a product and store or transport it, and basic information such as production date, expiration date, and country of origin of the packaged product is written on the product packaging material to record the product's history, such as production, management, and distribution. We are making it possible to manage.

Korean registered patent 10-0927981 discloses pocket thermal printer technology for printing labels. In the above registered patent, product information was printed using a printer that prints data on a label, and a sticker was manually attached to the completed packaging material. However, as the product information is not printed directly on the packaging but is attached manually using stickers, problems such as stickers being attached to other packaging materials or stickers being damaged or lost during storage or transportation of the product often occur. there was.

Korean Patent No. 10-1336573 discloses automatic bag printing device technology. In the above registered patent, information about the product is printed directly on the packaging containing the product by lowering the printing plate. The above printing device technology does not mark properly when the packaging material is very curved because the size or shape of the contents inside the packaging material is not constant, so the marked letters, numbers, barcodes, and QR codes do not appear clearly, thereby obtaining accurate information about the product. There was a problem that made it difficult to do.

In addition, the product (fabric) that makes up the packaging material is woven with thick wefts and warps like hemp bag, and if force is applied while the contents are inside (due to the contents being tilted when lifting the packaging material or moving the packaging material), a part of the packaging material may break. As the product stretched or spread, the marked letters, numbers, barcodes, and QR codes did not appear clearly, making it difficult to obtain accurate information about the product.

Additionally, because the product information was marked on the packaging, visibility was lacking, which resulted in a delay in finding product information.

Additionally, when marking using ink, there was a problem in that the marking was erased or smeared depending on the material of the packaging material or the working environment.

KR 10-0927981 B KR 10-1336573 B

The present invention relates to a laser marking machine that partially coats packaging materials and marks product information on the coated surface, thereby clearly marking the packaging materials, and a method for marking packaging materials using the same.

In addition, the present invention relates to a laser marking machine that partially coats a portion of a packaging material in a different color from the packaging material and marks product information on the coated surface so that the marking is visible, and a method of marking packaging materials using the same.

In order to achieve the above object, a laser marking machine according to an embodiment of the present invention includes a coating part that forms a coating surface on an outer part of the packaging material, and a packaging part that inserts and packages the contents into the packaging material on which the coating surface is formed in the coating part, The packaging unit includes a marking unit for laser marking content information on the coating surface of the packaging material, and the coating surface of the packaging material is thicker than other parts of the packaging material, so that the coating surface is gently curved after the contents are placed in the packaging material. It can be formed so that there is little deformation of the laser marking.

The coating unit forms a coating surface by curing the coating film fused in the coating forming unit and the coating forming unit that fuses the coating film to the coating area designated by the coating area setting unit and the coating area setting unit that designates a portion of the outer side of the packaging as the coating area. It may be formed to include a coating hardening portion and a synthetic resin coating film fused to the outside of the packaging material at the coating forming portion.

The marking unit includes a detection sensor that detects packaging material entering the conveyor belt and transmits the detected data to the control unit, a camera that scans the packaging material detected by the detection sensor and transmits the scanned data to the control unit, and a camera that transmits the scanned data to the control unit. Marking data is formed by emitting light in the marking area of the packaging material calculated by the control unit using the data. At this time, the focal length is changed in response to the curvature of the marking area of the packaging material, and the marking laser head, the camera, and the laser head are connected to the fixing unit. It is connected to the Shanghai East part, which moves up and down on the fixture according to the scanning position of the camera or the marking area of the laser head, and displays information related to the laser marking in progress. A screen that can modify the displayed information and the packaging material The speed of the conveyor belt is adjusted using data transmitted from the detection sensor and a database that stores preliminary information such as the marking data to be marked, the shape of the existing packaging material, and the location where the marking data will be formed according to the shape, and the data transmitted from the camera is used. It may be characterized by including a control unit that calculates the marking area coordinates and marking area focal length by comparing them with prior information in the DB and transmits them to the laser head.

The marking unit further includes an RF tag attacher that attaches an electronic tag (RFID tag) containing content information, and an RF tag reader that recognizes information on the RF tag attacher, according to packaging material information scanned by the RF tag reader. It can be characterized in that the speed and direction of movement of the conveyor belt are controlled by the control unit and the conveyor belt is transferred to an automatic sorter without stopping the operation.

The coated surface may be formed in a different color from the packaging material.

In the marking section, the contents information is marked on the coated surface, and the used packaging material is re-coated on the top of the coated surface in the coating section so that the marking data is not visible, and new contents are added to the packaging material on which the re-coated side is formed in the coating section. It may be formed to include a packaging unit for inserting and packaging, and a marking unit for laser marking information on the newly packaged contents on the recoated surface of the packaging material in which the new contents are packaged in the packaging unit.

A method of marking packaging materials using a laser marking machine according to an embodiment of the present invention to achieve the above object includes a coating step of forming a coating surface on an outer portion of the packaging material, inserting contents into the packaging material on which the coating surface is formed in the coating step, and It may be characterized as comprising a packaging step of packaging and a marking step of laser marking content information on the coating surface of the packaging material in which the contents are packaged in the packaging unit.

The coating step includes a first step of inserting the packaging material to be coated into the coating area setting portion, a second step of designating a coating area on an outer part of the packaging material inserted in the first step, and a coating area designated in the second step. A third step of installing a coating film made of a synthetic resin material that is different from the color of the packaging material on the coating forming part accordingly, a fourth step of seating the coating film mounted in the third step on the coating area of the packaging material, and the fourth step A fifth step of lowering the heating plate on the coating film seated in the step to heat and fuse it to the packaging material, and a sixth step of cooling the coating film fused in the fifth step in the coating forming section to form a coating surface on the outer surface of the packaging material. and a seventh step of taking out the packaging material on which the coating surface was formed in the sixth step.

The packaging step includes an eighth step of mounting the packaging material coated in the coating step to the sorter, a ninth step of inserting the contents of agricultural products or boxes sorted in the sorter into the packaging material mounted in the eighth step, and the ninth step. It may be characterized by comprising a tenth step of sealing the open upper part of the packaging material into which the contents are inserted, and an eleventh step of moving the packaging material sealed in the tenth step to a conveyor belt for marking.

The marking step is a twelfth step in which preliminary information such as marking data and the shape of the packaging material and the location where the marking data will be formed according to the shape is input into the DB, and a detection sensor detects and detects the packaging material moved to the conveyor belt in the packaging step. A 13th step of transmitting data to the control unit, and a 14th step of the control unit checking the gap between packaging materials using the data transmitted in the 13th step and adjusting the speed of the conveyor belt if the gap between packaging materials is close and there is insufficient time for marking. In the 15th step, the camera scans the packaging material detected in the 13th step and transmits it to the control unit, and the control unit compares the data transmitted from the camera in the 15th step with the prior information data in the DB to calculate coordinates to mark the packaging material. , a 16th step of calculating the focal length data by measuring the distance and inclination of the coordinate to be marked with data transmitted from the camera, and transmitting the coordinate to be marked, focal length data, and marking data calculated in the 16th step to the laser head. In the 17th step and the 18th step of changing the position of the laser head so that it can mark the coordinates to be marked transmitted in the 17th step, the laser head whose position has been changed in the 18th step is placed on the coated surface of the packaging material in the 17th step. A 19th step of forming marking data by changing the focal length according to the transmitted focal length data and emitting light, and a 20th step of moving the packaging material on which the marking data was formed in the 19th step along a conveyor belt. can be formed.

After using the packaging material on which the marking data was formed in the marking step, re-coating is performed on the upper portion of the coating surface of the packaging material on which the coating surface is formed, so that the previously formed marking data is not visible (S100'), and the re-coating step A repackaging step (S200') in which new contents are inserted and packaged into the packaging material on which the re-coated side is formed, and a re-marking step in which information on the newly packaged contents is laser marked on the re-coated side of the packaging material in which the new contents were packaged in the re-packaging step. It may be formed to include a step (S300').

According to the laser marking machine of the present invention and the packaging material marking method using the same, the outside of the packaging material is partially coated to form a coated surface, and the coating surface is marked with a laser to ensure clear marking.

In addition, the present invention has the effect of increasing the visibility of the marking by forming a coated surface in a different color from the packaging material.

1 is a configuration diagram of a laser marking machine according to an embodiment of the present invention.
FIG. 2 is a diagram briefly illustrating the configuration of the coating portion of FIG. 1.
Figure 3 is a perspective view showing the packaging material on which the coating surface is formed in Figure 2.
Figure 4 is a diagram briefly illustrating the configuration of the packaging part of Figure 1.
Figure 5 is a perspective view showing the packaging material in Figure 4 in a packaged state.
FIG. 6 is a diagram briefly illustrating the configuration of the marking portion of FIG. 1.
Figure 7 is a block diagram showing the configuration of Figure 6.
Figure 8 is a perspective view showing a state in which contents information is marked on the packaging material of Figure 5.
Figure 9 shows a flow chart of the packaging material marking method using the laser marking machine of the present invention.
Figure 10 shows a flowchart of the coating step for showing the coating surface on the packaging material in Figure 9.
Figure 11 shows a flow chart of the packaging step of inserting the contents into the packaging material on which the coating surface is formed in Figure 9 and then packaging it.
Figure 12 shows a flowchart of the marking step for recording product information on the packaging material packaged in Figure 9.
Figure 13 shows a flow chart of another embodiment of the packaging material marking method using the laser marking machine of the present invention.

Hereinafter, the present invention will be described with reference to the attached drawings. However, the present invention may be implemented in various different forms and, therefore, is not limited to the embodiments described herein.

Throughout the specification, when a part is said to be "connected (connected, contacted, combined)" with another part, this means not only "directly connected" but also "indirectly connected" with another member in between. "Includes cases where it is. Additionally, when a part is said to “include” a certain component, this does not mean that other components are excluded, but that other components can be added, unless specifically stated to the contrary.

The terms used herein are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Preferred embodiments of the present invention will be described in detail along with the drawings so that a person skilled in the art can easily carry out the invention.

FIG. 1 is a configuration diagram of a laser marking machine according to an embodiment of the present invention, FIG. 2 is a diagram briefly showing the configuration of the coating portion of FIG. 1, and FIG. 3 is a perspective view showing the packaging material on which the coating surface in FIG. 2 is formed. In the following description, the packaging material 101 before the coating surface 105 is formed and the packaging material 103 on which the coating surface 105 is formed will be described separately.

The laser marking machine 100 of the present invention includes a coating portion 110, a packaging portion 130, and a marking portion 150. The laser marking machine 100 of the present invention attaches a coating film 114 to the outer part of the packaging material 101 in the coating unit 110 to form a coating surface 105, and forms a coating surface 105 in the packaging unit 130. ) After inserting and sealing the contents, the marking part 150 marks the coating surface 105 so that product information can be clearly laser marked on the outer surface of the packaging material. In addition, the laser marking machine 100 of the present invention is characterized in that the coating surface 105 is formed in a different color from the packaging material 103, so that the marking data 109 marked on the coating surface 105 has high visibility.

The coating portion 110 includes a coating area setting portion 111, a coating forming portion 112, a coating curing portion 113, and a coating film 114. The coating portion 110 designates a portion to be coated on the outside of the packaging material 101, attaches a coating film 114 to the designated portion, and cures the attached coating film 114 to form a coating surface on the packaging material 103 ( 105).

The coating surface 105 formed in the coating portion 110 is smooth, allowing clear marking. In addition, since the coating surface 105 of the packaging material 103 is thicker than other parts of the packaging material 103, the curve that appears when the contents are placed is gently formed, so that marking is clearly done and the information about the contents is kept even after marking. There is little variation in the marking data 109 included, so the marking data 109 can be accurately obtained.

The packaging material 101 may be a PP gunny packaging material made of various synthetic resin materials such as polyethylene (PE) or polypropylene (PP), or various packaging materials made of synthetic fiber knitted fabric, paper, etc.

The coating area setting unit 111 designates a portion of the outer side of the inserted packaging material 101 as a coating area.

The coating forming unit 112 seats the coating film 114 on the coating area of the packaging material 101 designated by the coating area setting unit 111, and a heating plate (not shown) inside the coating forming unit 112 is lowered. The coating film 114 is heated and fused to the packaging material 101. The coating forming portion 112 has been described as forming the coating surface 105 using a heat fusion method. However, the method of forming the coating surface 105 includes ultrasonic fusion or applying a coating solution to the packaging material 101. method can be used.

The coating hardening part 113 has an internal cooling plate (not shown) lowered to cool the coating film 114 fused in the coating forming part 112 to form a coating surface 105 on the outside of the packaging material 103. .

The coating film 114 is coated by selecting a synthetic resin film such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), and polyethylene terephthalate (PET). The coating film 114 is characterized by having a color distinct from the packaging material 101. The coated surface 105 formed by attaching the coating film 114 has a different color from the packaging material 103, so it has high visibility, and information about the contents marked on the coated surface 105 can be easily found.

In Figure 3, the coating surface 105 is shown as being formed long in the longitudinal direction on the outer surface of the packaging material 103. However, the coating surface 105 may be formed in various positions, sizes, and shapes on the packaging material 103 depending on the section that the laser marking machine can mark or the shape of the packaging material during marking.

Figure 4 is a diagram briefly showing the configuration of the packaging part of Figure 1, and Figure 5 is a perspective view showing the packaging material in Figure 4 in a packed state.

The packaging unit 130 is packaged by inserting the contents into the packaging material 103 on which the coating surface 105 is formed in the coating unit 110. The packaging unit 130 mounts the packaging material 103 on the sorter 131 and puts contents such as agricultural products falling from the sorter 131 or cargo classified according to destination into the packaging material 103. When the packaging material 103 is filled with contents, the open upper part 107 is sealed and then moved on the conveyor belt 151 to the marking unit 150 to mark the contents information.

The packaging material 103 filled with contents in the packaging unit 130 has many curves on the outside depending on the shape of the contents. In particular, when the packaging material 103 is filled with contents that are hard and have edges, the shape of the contents appears on the outside of the packaging material 103. At this time, the coating surface 105 of the packaging material 103 is thicker than other parts, so the curves that appear when the contents are contained are gently formed.

FIG. 6 is a diagram briefly showing the configuration of the marking portion of FIG. 1, FIG. 7 is a block diagram showing the configuration of FIG. 6, and FIG. 8 is a perspective view showing a state in which content information is marked on the packaging material of FIG. 5.

The marking unit 150 includes a detection sensor 152, Shanghai East 154, camera 155, laser head 156, screen 157, control unit 158, and DB 159. The marking unit 150 scans the packaging material 103 coming from the packaging unit 130 to recognize the shape of the packaging material 103, and compares the shape of the recognized packaging material with the shape of the packaging stored in the DB to mark the packaging material ( Find the marking area (103) and mark it with a laser to generate marking data (109). The marking area of the packaging material 103 is located on the coating surface 105. The marking part 150 is characterized by changing the focal length in response to the curve formed in the marking area of the packaging material 103. The marking data 109 may be date information such as production date and expiration date, content name, and content information such as barcode and QR code.

The detection sensor 152 detects the packaging material 103 entering and moving on the conveyor belt 151. The detection sensor 152 transmits the detection data to the control unit 158, and the control unit 158 checks the distance between the packaging materials 103 using the detection data and determines the speed of the conveyor belt 151 and the gap between the packaging materials 103 and The speed of the conveyor belt 151 can be adjusted by calculating the time for laser marking.

The upper portion 154 is formed on one side of the fixing part 153 in the width direction, and connects the fixing part 153 with the camera 155 and the laser head 156. The Shanghai East part 154 can move up and down on the fixing part 153 depending on the scanning position of the camera 155 or the marking area of the laser head 156.

The camera 155 scans the shape of the packaging material 103 moving on the conveyor belt 151 and transmits it to the control unit 158. The control unit 158 compares the scan data with the shape and marking area of the packaging material 103 stored in the DB 159 and calculates the coordinates of the marking area of the packaging material 103 moving on the conveyor belt 151. Additionally, the control unit 158 calculates focal length data by measuring the distance and inclination of the marking area using data transmitted from the camera.

The laser head 156 marks marking data 109 containing information on the contents of the packaging material 103 moving on the conveyor belt 151. The laser head 156 receives marking area coordinates from the control unit 158 and adjusts its height. The laser head 156 receives the marking data 109 from the control unit 158 and emits light to the marking area of the packaging material 103 to mark the marking data 109, and the marking area is coated with the packaging material 103. It is characterized by being a surface (105). At this time, the laser head 156 receives focal length data from the control unit 158 and marks by changing the focal length in response to the curvature of the marking area of the packaging material 103.

The screen 157 is formed on the other side of the fixing part 153 in the width direction, marking data 109 including information on the contents, the shape of the packaging material transmitted from the camera 155, the coordinates of the marking position, the focal length, and Information related to the laser marking in progress, such as the speed of the conveyor belt, is displayed. Additionally, the screen 157 can directly input marking data 109 including content information or modify the information displayed on the screen 157.

The DB 159 determines the location where marking data 109 containing information on the contents of the inserted packaging material 103 will be formed according to the shape and shape of the existing packaging material and the packaging material 103 currently moving on the conveyor belt 151. ), prior information such as marking data 109 to be marked is stored.

In addition, the marking unit further includes an RF tag attacher (not shown) that attaches an electronic tag (RFID tag) containing content information, and an RF tag reader (not shown) that recognizes information on the RF tag attacher. The control unit 158 controls the speed and direction of the conveyor belt according to the packaging material information scanned by the RF tag reader (not shown) and transfers the conveyor belt to the automatic sorter without stopping the operation.

In the present invention, the packaging material 103 with marking data 109 formed on the coated surface 105 can be reused. In the coating unit 100, the coating surface 105 on which the marking data 109 is formed is designated as a coating area, and a coating film is fused on the coating surface 105 to form a new coating surface, so that the existing marking data 109 is This can be done by changing it so that it is not visible.

Figure 9 shows a flow chart of the method of marking packaging materials using the laser marking machine of the present invention, Figure 10 shows a flow chart of the coating step for showing the coating surface on the packaging material in Figure 9, and Figure 11 shows the coating surface formed in Figure 9. It shows a flowchart of the packaging step of packaging after inserting the contents into the packaging material, and FIG. 12 shows a flowchart of the marking step for recording product information on the packaging material packaged in FIG. 9.

The method of marking packaging materials using a laser marking machine according to the present invention includes a coating step (S100) of coating a portion of the outer side of the packaging material 101 to form a coated surface 105, and a coating step (S100) of forming a coated surface 105 on the packaging material 103 on which the coating surface 105 is formed in the coating step. It includes a packaging step (S200) of packaging the contents and a marking step (S300) of marking the coated surface 105 of the packaging material 103 packaged in the packaging step with a laser.

The coating step (S100) includes a first step (S110) of inserting the packaging material 101 to be coated into the coating area setting unit 111, and a step of designating a coating area on the packaging material 101 inserted in the first step. In the second step (S120), a coating film 114 made of a synthetic resin material that is different from the color of the packaging material is mounted on the coating formation portion 112 according to the coating area designated in the second step (S130). At this time, in the second step, the coating area becomes a part of the outside of the packaging material.

The fourth step (S140) in which the coating film 114 mounted in the third step is seated on the coating area of the packaging material 101, and the heating plate is lowered on the coating film 114 mounted in the fourth step and the packaging material ( The fifth step (S150) of heating and fusing to 101), and cooling the coating film 114 fused in the fifth step in the coating forming part 112 to form a coating surface 105 on the outer surface of the packaging material 103. It includes a sixth step (S160) of forming and a seventh step (S170) of taking out the packaging material 103 on which the coating surface 105 was formed in the sixth step.

The packaging step (S200) includes an eighth step (S210) of mounting the packaging material 103 coated in the coating step (S100) on the sorter 131, and a sorter 131 on the packaging material 103 mounted in the eighth step. ), a 9th step (S230) of inserting the contents of agricultural products or boxes classified in ), and a 10th step (S250) of sealing the open upper part 107 of the packaging material 103 into which the contents were inserted in the 9th step. and an 11th step (S270) of moving the packaging material 103 sealed in the 10th step to the conveyor belt 151 for marking.

The marking step (S300) is a process in which preliminary information such as marking data 109 including information on the contents and the position where marking data 109 will be formed according to the shape and shape of the packaging material 103 are input into the DB 171. A 12th step (S310), and a 13th step (S320) in which the detection sensor 155 detects the packaging material 103 moved to the conveyor belt 151 in the 11th step and transmits the detection data to the control unit 158. , the control unit 158 checks the gap between the packaging materials 103 using the data transmitted in the 13th step, and if the gap between the packaging materials 103 is close and there is insufficient time for marking, the control unit 158 adjusts the speed of the conveyor belt 151. Step (S330), and a 15th step (S340) in which the camera 155 scans the packaging material 103 moving on the conveyor belt 151 detected in the 13th step and transmits it to the control unit. The control unit 158 compares the data transmitted from the camera 155 with the prior information data of the DB 159 to calculate the coordinates to be marked on the packaging material 103, and determines the coordinates to be marked with the data transmitted from the camera 155. A 16th step (S350) of calculating focal length data by measuring the distance and inclination, and a step of transmitting the marking coordinates, focal length data, and marking data 109 calculated in the 16th step to the laser head 156. A 17th step (S360), an 18th step (S370) of changing the position of the laser head 156 so that it can mark the coordinates to be marked transmitted in the 17th step, and the laser head whose position has been changed in the 18th step A 19th step (S380) in which (156) emits light to the coated surface 105 of the packaging material 103 while changing the focal length according to the focal length data transmitted in the 17th step to form marking data 109. , and a 20th step (S390) in which the packaging material 103 on which the marking data 109 is formed in the 19th step moves along the conveyor belt 151.

Figure 13 shows a flow chart of another embodiment of the packaging material marking method using the laser marking machine of the present invention.

Another embodiment of the method of marking packaging materials using a laser marking machine of the present invention includes a method that allows reuse after using the packaging material 103 marked in the marking step (S300).

The marked packaging material 103 undergoes a coating step (S100) of coating a portion of the outer side of the packaging material 101 to form a coating surface 105, and the contents are applied to the packaging material 103 on which the coating surface 105 is formed in the coating step. It refers to a packaging material that has been used once, including a packaging step (S200) and a marking step (S300) of marking the coated surface 105 of the packaging material 103 packaged in the packaging step with a laser.

In order to reuse the marked packaging material 103, re-coating is performed on the upper portion of the coating surface of the packaging material on which the coating surface is formed, and the previously formed marking data is not visible in the re-coating step (S100') and the re-coating step in the re-coating step. A repackaging step (S200') in which new contents are inserted and packaged into the packaging material on which the coated surface is formed, and a remarking step ( S300').

In addition, the description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. You will be able to. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as single may be implemented in a distributed or divided form, and similarly, components described as distributed or divided may also be implemented in a combined form within the range understood by a person skilled in the art. there is.

The scope of the present invention is indicated by the patent claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

100: Method of marking packaging materials using a laser marking machine
101: packaging material 103: packaging material
105: Coated surface 109: Marking data
110: coating section 111: coating area setting section
112: Coating forming part 113: Coating hardening part
114: coating film 130: packaging unit
150: Marking part 151: Conveyor belt
152: Detection sensor 154: Eastern Shanghai
155: camera 156: laser head
157: screen 158: control unit
159 : DB

Claims (10)

A coating portion forming a coating surface on an outer portion of the packaging material;
A packaging unit that inserts and packages the contents into the packaging material on which the coating surface is formed in the coating unit;
It includes a marking unit that laser marks contents information on the coating surface of the packaging material in which the contents are packaged in the packaging unit,
Since the coating surface of the packaging material is thicker than other parts of the packaging material, the coating surface is gently curved after the contents are immersed, so that the deformation of the laser marking is small.
According to clause 1,
The coating part
A coating area setting unit that designates a portion of the outer side of the packaging material as a coating area;
A coating forming unit that fuses a coating film of a different color from the packaging material to the coating area designated in the coating area setting unit;
A coating curing unit that forms a coating surface by curing the coating film fused in the coating forming unit;
A laser marking machine comprising a synthetic resin coating film fused to the outside of the packaging material at the coating formation portion.
According to clause 1,
The marking part
A detection sensor that detects packaging material entering the conveyor belt and transmits the detected data to the control unit;
a camera that scans the packaging material detected by the detection sensor and transmits the scanned data to a control unit;
A laser head that emits light in the marking area of the packaging material calculated by the control unit using the data scanned from the camera to form marking data, and marks by changing the focal length in response to the curvature of the marking area of the packaging material;
A Shanghai East unit connects the camera and the laser head to the fixed part and moves the fixed part up and down depending on the scanning position of the camera or the marking area of the laser head;
A screen connected to the fixture and displaying information related to laser marking in progress, and allowing the displayed information to be modified;
A DB that stores preliminary information such as marking data, which is information on the contents to be marked on the packaging material, the shape of the existing packaging material, and the location where the marking data will be formed according to the shape;
A control unit that controls the speed of the conveyor belt with the data transmitted from the detection sensor, calculates the marking area coordinates and marking area focal length by comparing the data transmitted from the camera with the preliminary information in the DB, and transmits them to the laser head; A laser marking machine characterized in that.
According to claim 3,
The marking unit includes an RF tag attacher that attaches an electronic tag (RFID tag) containing content information; and
It further includes an RF tag reader that recognizes information from the RF tag attacher,
A laser marking machine characterized in that the speed and direction of the conveyor belt are controlled by the control unit according to the packaging material information scanned by the RF tag reader, and the conveyor belt is transferred to the automatic sorter without stopping the operation.
According to clause 1,
A laser marking machine characterized in that the packaging material used in the marking section is re-coated on the upper portion of the coating surface in the coating section so that the marking data is not visible.
A coating step of forming a coating surface on an outer portion of the packaging material;
A packaging step of inserting and packaging the contents into the packaging material on which the coating surface is formed in the coating step;
A method of marking packaging materials using a laser marking machine, including a marking step of laser marking content information on the coating surface of the packaging material in which the contents are packaged in the packaging unit.
According to clause 6,
The coating step includes a first step of inserting the packaging material to be coated into the coating area setting portion;
A second step of designating a coating area on an outer portion of the packaging material inserted in the first step;
A third step of installing a coating film made of synthetic resin material that is different from the color of the packaging material on the coating forming part according to the coating area designated in the second step;
A fourth step in which the coating film mounted in the third step is seated on the coating area of the packaging material;
A fifth step of heating and fusing the coating film placed in the fourth step by lowering the heating plate to the packaging material;
A sixth step of cooling the coating film fused in the fifth step in the coating forming portion to form a coating surface on the outer surface of the packaging material;
A method for marking packaging materials using a laser marking machine, including a seventh step of taking out the packaging material on which the coating surface was formed in the sixth step.
According to clause 6,
The packaging step includes an eighth step of mounting the packaging material coated in the coating step on a sorter;
A ninth step of inserting the contents of the agricultural products or boxes sorted by the sorter into the packaging material installed in the eighth step;
A tenth step of sealing the open upper part of the packaging material into which the contents were inserted in the ninth step;
An 11th step of moving the packaging material sealed in the 10th step to a conveyor belt for marking. A packaging material marking method using a laser marking machine including a.
According to clause 6,
The marking step includes a twelfth step in which preliminary information such as marking data and the shape of the packaging material and the location where the marking data will be formed according to the shape are input into the DB;
A 13th step in which a sensor detects the packaging material moved to the conveyor belt in the packaging step and transmits the detection data to the control unit;
A 14th step in which the control unit checks the gap between packaging materials using the data transmitted in the 13th step and adjusts the speed of the conveyor belt if the gap between packaging materials is close and there is insufficient time for marking;
A 15th step in which a camera scans the packaging material detected in the 13th step and transmits it to a control unit;
In the 15th step, the control unit compares the data transmitted from the camera with the prior information data in the DB to calculate the coordinates to be marked on the packaging material, and measures the distance and inclination of the coordinates to be marked with the data transmitted from the camera to provide focal length data. Step 16 of calculating;
A 17th step of transmitting the marking coordinates, focal length data, and marking data calculated in the 16th step to the laser head;
An 18th step of changing the position of the laser head so that it can mark the coordinates to be marked transmitted in the 17th step;
A 19th step in which the laser head whose position has been changed in the 18th step emits light on the coating surface of the packaging material while changing the focal length according to the focal length data transmitted in the 17th step to form marking data;
A 20th step of moving the packaging material on which marking data is formed in the 19th step along a conveyor belt. A packaging material marking method using a laser marking machine including a.
In clause 6
After using the packaging material on which the marking data was formed in the marking step, re-coating is performed on the upper portion of the coating surface of the packaging material on which the coating surface is formed, so that the previously formed marking data is not visible (S100');
A repackaging step (S200') of inserting and packaging new contents into the packaging material on which the recoating surface was formed in the recoating step; and
A remarking step (S300') of laser marking the newly packaged content information on the recoated surface of the packaging material in which the new content was packaged in the repackaging step (S300'). A packaging material marking method using a laser marking machine including a.

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