CN112319942A - Packaging bag heat sealing detection method and device - Google Patents
Packaging bag heat sealing detection method and device Download PDFInfo
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- CN112319942A CN112319942A CN201910657811.1A CN201910657811A CN112319942A CN 112319942 A CN112319942 A CN 112319942A CN 201910657811 A CN201910657811 A CN 201910657811A CN 112319942 A CN112319942 A CN 112319942A
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- 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
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/3404—Sorting according to other particular properties according to properties of containers or receptacles, e.g. rigidity, leaks, fill-level
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Abstract
The invention discloses a packaging bag heat-sealing detection method and device, which comprises a heat-sealing device and a detection device, wherein the heat-sealing device comprises a heat-sealing part, a pressurizing part and an elastic part between the heat-sealing part and the pressurizing part, the detection device comprises a position sensor and a controller, the position sensor is used for acquiring a position signal of the pressurizing part and sending the position signal to the controller, and the controller is used for judging the heat-sealing quality. The invention judges whether the heat sealing quality is qualified or not by collecting the position signal of the pressurizing part, achieves the aim of identifying the heat sealing quality defect caused by the heat sealing pressure change, and is very accurate and reliable.
Description
Technical Field
The invention relates to the technical field of packaging bag production, in particular to a packaging bag heat-sealing detection method and device.
Background
The packaging bag is seen everywhere in our life, the existing packaging bag making machine comprises a feeding device, a conveying device, a punching device, a heat sealing device and a cutting device, and the working principle is that a tubular double-layer plastic film semi-finished product is processed into a packaging bag finished product. The double-layer plastic film of rolling up on the cylinder is placed on loading attachment at first, then is driven the transportation by conveyer's driving roller, then reaches punching device, and some wrapping bags need punch a hole and then open punching device, and some wrapping bags need not punch a hole and then close punching device. And then the double-layer plastic film enters a heat sealing device for hot-pressing edge sealing, and finally the double-layer plastic film is cut into individual packaging bag finished products by a cutting device.
In the bag making process, quality defects such as poor heat sealing of the packaging bag and the like can be caused due to factors such as tension change of the plastic film, heat sealing pressure change, heat sealing temperature change, movement speed change of the plastic film, material defects and the like. Such quality-defective packages are generally identified and rejected by inspection workers by manual eye force. But the manual labor is used for identifying the defects of the heat sealing quality and rejecting unqualified products, which wastes time, labor and energy and is difficult to ensure the qualification rate of the products.
Disclosure of Invention
The invention aims to provide a packaging bag heat-sealing detection method and device, which can automatically and accurately identify heat-sealing quality defects caused by heat-sealing pressure changes.
In order to achieve the above purpose, the invention adopts the technical scheme that:
the invention discloses a packaging bag heat-sealing detection method, which is characterized in that a heat-sealing device is arranged for carrying out hot-pressing edge sealing on a packaging bag, and the heat-sealing device comprises a heat-sealing part, a pressurizing part and an elastic part between the heat-sealing part and the pressurizing part; a position sensor is arranged to acquire a position signal of the pressurizing part and send the position signal to a controller; the controller judges the heat sealing quality according to the received position signal; and when the controller finds that the heat sealing quality is not qualified, an alarm signal and/or a rejection signal are/is sent out.
As a preferable technical scheme, the position sensor is arranged on the side surface of the heat sealing device and acquires a position signal of the pressurizing component in the horizontal direction; when the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
As a preferable technical scheme, the position sensor is arranged above the heat sealing device and acquires a position signal of the top of the pressurizing part in the vertical direction; when the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
As a preferable technical scheme, the position sensor is installed on the heat sealing component or the pressurizing component, and the position sensor acquires a relative position signal between the pressurizing component and the heat sealing component in the vertical direction; when the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
Preferably, the position signal is a position detection signal or a position distance signal.
Preferably, the position sensor is a touch sensor, a proximity switch or a distance measuring sensor.
The invention also discloses a packaging bag heat-sealing detection device which comprises a heat-sealing device and a detection device, wherein the heat-sealing device comprises a heat-sealing part, a pressurizing part and an elastic part between the heat-sealing part and the pressurizing part, the detection device comprises a position sensor and a controller, the position sensor is used for acquiring the position signal of the pressurizing part and sending the position signal to the controller, and the controller is used for judging the heat-sealing quality.
In a preferred embodiment, the position sensor is disposed on a side surface of the heat sealing device, and the position sensor is configured to acquire a position signal of the pressing member in a horizontal direction.
As a preferred technical solution, the position sensor is disposed above the heat sealing device, and the position sensor is used for acquiring a position signal of the top of the pressing member in a vertical direction.
As a preferable technical solution, the position sensor is mounted on the heat-seal member or the pressing member, and the position sensor is used for acquiring a relative position signal between the pressing member and the heat-seal member in a vertical direction.
Preferably, the position sensor is a touch sensor, a proximity switch or a distance measuring sensor.
The device comprises a controller, an alarm device and/or a defective product removing device, wherein the alarm device is used for receiving an alarm signal of the controller, and the defective product removing device is used for receiving a removing signal of the controller.
The invention has the beneficial effects that:
most of the existing heat sealing devices comprise a heat sealing part, a pressurizing part and an elastic part between the heat sealing part and the pressurizing part, when the heat sealing device performs hot-pressing edge sealing action, the heated heat sealing part moves downwards to contact the plastic film, the pressurizing part applies downward pressure, the pressure is transmitted to the heat sealing part through the elastic part, and the edge sealing of the plastic film is completed under the action of temperature and pressure. The change of the heat-sealing pressure can cause the defect of heat-sealing quality, but the heat-sealing pressure is difficult to detect and monitor. The invention finds that the heat sealing pressure is closely related to the pressing position of the pressing part, so that the invention judges whether the heat sealing quality is qualified or not by acquiring the position signal of the pressing part, and further sends out an alarm signal and/or a rejection signal, thereby achieving the purpose of identifying the heat sealing quality defect caused by the heat sealing pressure change, and being very accurate and reliable.
Drawings
FIG. 1 is a schematic view showing the structure of a heat-seal detecting apparatus for a packaging bag according to example 1;
FIG. 2 is a schematic view showing the structure of the heat-seal detecting apparatus for a packaging bag according to embodiment 2;
FIG. 3 is a schematic view showing the structure of the heat-seal detecting apparatus for a packaging bag according to example 3;
FIG. 4 is a schematic view showing the structure of the heat-seal detecting apparatus for a packaging bag according to example 4;
FIG. 5 is a schematic view showing the structure of the heat-seal detecting apparatus for a packaging bag according to example 5;
FIG. 6 is a schematic view showing the structure of a heat-seal detecting apparatus for a packaging bag according to example 6;
fig. 7 is a schematic structural view of the heat-seal detecting apparatus for a packaging bag according to example 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the heat-sealing detection device for a packaging bag of the present embodiment includes a heat-sealing device and a detection device.
The heat sealing device is used for carrying out hot-pressing edge sealing on the packaging bag and comprises a heat sealing part 1, a pressurizing part 2 and an elastic part 3 between the heat sealing part 1 and the pressurizing part 2; in this embodiment, the heat sealing member 1 is further provided with a guide connecting rod 4, and the guide connecting rod 4 penetrates through the pressurizing member 2 and then is connected through a nut 5. When the heat sealing device performs the heat-pressure edge sealing action, the heated heat-sealing member 1 moves downward to contact the plastic film 6, and pressure is applied downward by the pressing member 2, the pressure is transmitted to the heat-sealing member 1 through the elastic member 3 (such as a spring), the guide connecting rod 4 extends out of the top of the pressing member 2, and the plastic film 6 is subjected to the edge sealing action under the action of temperature and pressure.
The detection device comprises a position sensor 7 and a controller, the position sensor 7 is arranged on the side face of the heat sealing device, the position sensor 7 is used for collecting position signals of the pressurizing part 2 in the horizontal direction and sending the position signals to the controller, and the controller is used for judging the heat sealing quality.
In this embodiment, the position sensor 7 is a proximity switch, and the acquired position signal is a position detection signal.
The heat-sealing detection method of the packaging bag of the embodiment is as follows:
the position sensor 7 collects a position signal of the pressing member 2 in the horizontal direction and sends the position signal to the controller.
When the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
In this embodiment, the position sensor 7 is provided at the upper side of the heat sealing apparatus, and the threshold value is set to "no detection signal 0", that is, the pressing member 2 is pressed down to be lower than the plane where the position sensor 7 is located. If the pressing position of the pressing component 2 is not enough, the position signal received by the controller is 'detected signal 1', which indicates that the heat-sealing pressure is insufficient and exceeds the set threshold value, and the controller judges that the heat-sealing quality is not qualified.
When the controller finds that the heat sealing quality is unqualified, an alarm signal and/or a rejection signal are sent out, and the alarm device is controlled to perform an alarm action and/or the defective product rejection device is controlled to perform a rejection action.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that: the position sensor 8 is arranged at the lower part of the side surface of the heat sealing device, and the set threshold value is 'detected signal 1', namely, the pressure component 2 is pressed down to the plane of the position sensor 8. If the pressing position of the pressing member 2 is not enough, the position signal received by the controller is 'no detection signal 0', which indicates that the heat-sealing pressure is insufficient and exceeds the set threshold value, and the controller judges that the heat-sealing quality is not qualified.
Example 3
As shown in fig. 3, the present embodiment is different from embodiment 1 in that: the two position sensors are respectively arranged at the upper part and the lower part of the side surface of the heat sealing device.
The threshold value set by the upper position sensor 9 is "no detection signal 0", that is, the pressing member 2 is pressed down to be lower than the plane on which the upper position sensor 9 is located. If the pressing position of the pressing component 2 is not enough, the position signal received by the controller is 'detected signal 1', which indicates that the heat-sealing pressure is insufficient and exceeds the set threshold value, and the controller judges that the heat-sealing quality is not qualified.
The threshold value set by the lower position sensor 10 is "no detection signal 0", that is, the pressing member is pressed down to be higher than the plane on which the lower position sensor 10 is located. If the pressing position of the pressing part is too low, the controller receives a position signal of 'detected signal 1', which indicates that the heat-sealing pressure is too high (for some packaging bags, the heat-sealing pressure is too high and may cause defects), and therefore, the controller judges that the heat-sealing quality is not qualified.
Example 4
As shown in fig. 4, the heat-sealing detection device for the packaging bag of the present embodiment includes a heat-sealing device and a detection device.
The heat-sealing apparatus of this example was the same as that of example 1.
The detection device comprises a position sensor 11 and a controller, the position sensor 11 is arranged above the heat sealing device, the position sensor 11 is used for acquiring position signals of the top of the pressurizing part 2 in the vertical direction and sending the position signals to the controller, and the controller is used for judging the heat sealing quality.
In this embodiment, the position sensor 11 is a proximity switch, and the collected position signal is a position detection signal.
The heat-sealing detection method of the packaging bag of the embodiment is as follows:
the position sensor 11 collects a position signal of the top of the pressing member 2 in the vertical direction and sends the position signal to the controller.
When the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
In the present embodiment, the threshold value is set to "no detection signal 0", that is, the distance from the position sensor 11 to which the pressing member 2 is pressed. If the pressing position of the pressing component 2 is not enough, the position signal received by the controller is 'detected signal 1', which indicates that the heat-sealing pressure is insufficient and exceeds the set threshold value, and the controller judges that the heat-sealing quality is not qualified.
When the controller finds that the heat sealing quality is unqualified, an alarm signal and/or a rejection signal are sent out, and the alarm device is controlled to perform an alarm action and/or the defective product rejection device is controlled to perform a rejection action.
Example 5
As shown in fig. 5, the present embodiment is different from embodiment 4 in that: the position sensor 12 is used for acquiring a position signal of the top of the pressurizing part 2 in the vertical direction, the position sensor 12 is a distance measuring sensor, and the acquired position signal is a position distance signal.
In this embodiment, the position distance signal value acquired by the position sensor 12 under the predetermined qualified heat sealing pressure is, for example, 5 to 5.5cm, that is, the set threshold value is "5 to 5.5 cm". If the pressing position of the pressing member 2 is not enough, for example, the position signal received by the controller is "4.5 cm", which indicates that the heat-sealing pressure is insufficient and thus exceeds the set threshold, the controller judges that the heat-sealing quality is not good at this time. If the pressing position of the pressing member 2 is too low, for example, the controller receives a position signal of "6 cm", which indicates that the heat-sealing pressure is too high (for some packaging bags, the heat-sealing pressure may cause defects), and therefore exceeds a set threshold, the controller judges that the heat-sealing quality is not good.
Example 6
As shown in fig. 6, the heat-seal detection device for the packaging bag of the present embodiment includes a heat-seal device and a detection device.
The heat-sealing apparatus of this example was the same as that of example 1.
The detection device comprises a position sensor 13 and a controller, wherein the position sensor 13 is installed on the pressurizing part 2, the position sensor 13 is used for acquiring a relative position signal in the vertical direction between the pressurizing part 2 and the heat-sealing part 1 (in the embodiment, the relative position represents the distance between the position sensor 13 connected to the pressurizing part 2 and the top of the guide connecting rod 4 connected to the heat-sealing part 1), and sending the position signal to the controller, and the controller is used for judging the heat-sealing quality.
In this embodiment, the position sensor 13 is a proximity switch, and the collected position signal is a position detection signal.
The heat-sealing detection method of the packaging bag of the embodiment is as follows:
the position sensor 13 collects a relative position signal in the vertical direction between the pressing member 2 and the heat-seal member 1, and sends the position signal to the controller.
When the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
In the present embodiment, the threshold value is set to "there is a detection signal 1", that is, the relative distance in the vertical direction between the pressing member 2 and the heat-seal member 1 reaches the detection distance of the position sensor 13. If the pressing position of the pressing member 2 is insufficient and the detected distance of the position sensor 13 is not reached, the position signal received by the controller is "no detected signal 0", which indicates that the heat-seal pressure is insufficient and exceeds the set threshold, and the controller judges that the heat-seal quality is not good.
When the controller finds that the heat sealing quality is unqualified, an alarm signal and/or a rejection signal are sent out, and the alarm device is controlled to perform an alarm action and/or the defective product rejection device is controlled to perform a rejection action.
Example 7
As shown in fig. 7, the present embodiment is different from embodiment 6 in that: the position sensor 14 acquires a relative position signal between the pressurizing member 2 and the heat-sealing member 1 in the vertical direction, the position sensor 14 is a distance measuring sensor, and the acquired position signal is a position distance signal.
In this embodiment, the position distance signal value acquired by the position sensor 14, for example, 1 to 1.5cm, is determined to be "1 to 1.5 cm" in advance under the qualified heat sealing pressure. If the pressing position of the pressing member 2 is not enough, for example, the position signal received by the controller is "1.7 cm", which indicates that the heat-sealing pressure is insufficient and thus exceeds the set threshold, the controller judges that the heat-sealing quality is not good at this time. If the pressing position of the pressing member 2 is too low, for example, the controller receives a position signal of "0.8 cm", which indicates that the heat-seal pressure is too high (for some packaging bags, the heat-seal pressure may cause defects), and therefore exceeds the set threshold, the controller judges that the heat-seal quality is not good.
The invention only identifies the heat sealing quality defect caused by the heat sealing pressure change, and the skilled person should understand that the heat sealing quality defect can be caused by other factors such as the heat sealing temperature change. Therefore, when the heat-seal pressure is judged to be unqualified by using the invention, the heat-seal quality is unqualified; when the invention is used for judging that the heat sealing pressure is qualified, the heat sealing quality is not always qualified, and other judgment factors such as temperature and the like are also needed.
The invention is not limited to the heat sealing device of the above embodiment, and for other structural forms of heat sealing devices, when the position sensor needs to be installed on the heat sealing device, the position sensor can be selectively installed on the heat sealing component or the pressurizing component according to a specific structure, so that the acquisition of the relative position signal between the pressurizing component and the heat sealing component in the vertical direction can be achieved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (12)
1. A packaging bag heat-sealing detection method is characterized in that:
arranging a heat sealing device for carrying out hot-pressing edge sealing on the packaging bag, wherein the heat sealing device comprises a heat sealing part, a pressurizing part and an elastic part between the heat sealing part and the pressurizing part;
a position sensor is arranged to acquire a position signal of the pressurizing part and send the position signal to a controller;
the controller judges the heat sealing quality according to the received position signal;
and when the controller finds that the heat sealing quality is not qualified, an alarm signal and/or a rejection signal are/is sent out.
2. The heat-seal inspection method for a packaging bag according to claim 1, characterized in that: the position sensor is arranged on the side surface of the heat sealing device and used for acquiring a position signal of the pressurizing component in the horizontal direction; when the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
3. The heat-seal inspection method for a packaging bag according to claim 1, characterized in that: the position sensor is arranged above the heat sealing device and used for acquiring a position signal of the top of the pressurizing part in the vertical direction; when the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
4. The heat-seal inspection method for a packaging bag according to claim 1, characterized in that: the position sensor is arranged on the heat-sealing component or the pressurizing component and acquires a relative position signal between the pressurizing component and the heat-sealing component in the vertical direction; when the heat sealing device executes the hot-pressing edge sealing action, the position signal received by the controller exceeds a set threshold value, and the controller judges that the heat sealing quality is unqualified.
5. The heat-seal inspection method for the packaging bag according to any one of claims 1 to 4, characterized in that: the position signal is a position detection signal or a position distance signal.
6. The heat-seal inspection method for the packaging bag according to claim 5, characterized in that: the position sensor is a contact sensor, a proximity switch or a distance measuring sensor.
7. The utility model provides a wrapping bag heat-seal detection device which characterized in that: the heat sealing device comprises a heat sealing device and a detection device, wherein the heat sealing device comprises a heat sealing part, a pressurizing part and an elastic part between the heat sealing part and the pressurizing part, the detection device comprises a position sensor and a controller, the position sensor is used for acquiring a position signal of the pressurizing part and sending the position signal to the controller, and the controller is used for judging the heat sealing quality.
8. The packaging bag heat-seal detecting device according to claim 7, characterized in that: the position sensor is arranged on the side surface of the heat sealing device and used for acquiring a position signal of the pressurizing component in the horizontal direction.
9. The packaging bag heat-seal detecting device according to claim 7, characterized in that: the position sensor is arranged above the heat sealing device and used for acquiring a position signal of the top of the pressurizing part in the vertical direction.
10. The packaging bag heat-seal detecting device according to claim 7, characterized in that: the position sensor is arranged on the heat sealing component or the pressurizing component and is used for acquiring relative position signals between the pressurizing component and the heat sealing component in the vertical direction.
11. The packaging bag heat-seal detecting device according to any one of claims 7 to 10, characterized in that: the position sensor is a contact sensor, a proximity switch or a distance measuring sensor.
12. The packaging bag heat-seal detecting device according to claim 11, characterized in that: the device further comprises an alarm device and/or a defective product removing device, wherein the alarm device is used for receiving an alarm signal of the controller, and the defective product removing device is used for receiving a removing signal of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910657811.1A CN112319942A (en) | 2019-07-20 | 2019-07-20 | Packaging bag heat sealing detection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910657811.1A CN112319942A (en) | 2019-07-20 | 2019-07-20 | Packaging bag heat sealing detection method and device |
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| CN112319942A true CN112319942A (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910657811.1A Pending CN112319942A (en) | 2019-07-20 | 2019-07-20 | Packaging bag heat sealing detection method and device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004268932A (en) * | 2003-03-05 | 2004-09-30 | Dainippon Printing Co Ltd | Sealing device and seal control method |
| JP2005088947A (en) * | 2003-09-18 | 2005-04-07 | Pigeon Corp | Packaging apparatus |
| CN104169067A (en) * | 2012-01-17 | 2014-11-26 | 奇佩克有限公司 | Device and method for detecting defects during sealing of a package comprising a foil |
| JP2017030788A (en) * | 2015-07-31 | 2017-02-09 | 大日本印刷株式会社 | Seal device for packaging bag, seal inspection method of packaging bag, and manufacturing method of packaging product |
| CN206645116U (en) * | 2017-03-31 | 2017-11-17 | 东莞大伟成记玩具有限公司 | A kind of automatic sealing |
| CN208647283U (en) * | 2018-07-06 | 2019-03-26 | 河北方大包装股份有限公司 | A kind of polybag longitudinal direction heat seal quality on-line measuring device |
-
2019
- 2019-07-20 CN CN201910657811.1A patent/CN112319942A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004268932A (en) * | 2003-03-05 | 2004-09-30 | Dainippon Printing Co Ltd | Sealing device and seal control method |
| JP2005088947A (en) * | 2003-09-18 | 2005-04-07 | Pigeon Corp | Packaging apparatus |
| CN104169067A (en) * | 2012-01-17 | 2014-11-26 | 奇佩克有限公司 | Device and method for detecting defects during sealing of a package comprising a foil |
| JP2017030788A (en) * | 2015-07-31 | 2017-02-09 | 大日本印刷株式会社 | Seal device for packaging bag, seal inspection method of packaging bag, and manufacturing method of packaging product |
| CN206645116U (en) * | 2017-03-31 | 2017-11-17 | 东莞大伟成记玩具有限公司 | A kind of automatic sealing |
| CN208647283U (en) * | 2018-07-06 | 2019-03-26 | 河北方大包装股份有限公司 | A kind of polybag longitudinal direction heat seal quality on-line measuring device |
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