CN108859261B - Online detection device for heat sealing quality of plastic bag longitudinal heat sealing assembly line - Google Patents
Online detection device for heat sealing quality of plastic bag longitudinal heat sealing assembly line Download PDFInfo
- Publication number
- CN108859261B CN108859261B CN201810739829.1A CN201810739829A CN108859261B CN 108859261 B CN108859261 B CN 108859261B CN 201810739829 A CN201810739829 A CN 201810739829A CN 108859261 B CN108859261 B CN 108859261B
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- CN
- China
- Prior art keywords
- heat sealing
- plastic bag
- trigger rod
- trigger
- longitudinal heat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/006—Controlling; Regulating; Measuring; Safety measures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/60—Uniting opposed surfaces or edges; Taping
- B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
Abstract
An on-line detection device for heat sealing quality of a plastic bag longitudinal heat sealing assembly line is characterized in that the detection device senses displacement information of a trigger rod by using a proximity switch and controls the working state of a plastic bag longitudinal heat sealing machine; in the process of upward continuous operation of the plastic bag, the trigger head of the trigger rod applies a transverse outward pushing force to the longitudinal heat sealing seam in the plastic bag, the trigger head and the trigger rod lose resistance and shift outwards in the area of the longitudinal heat sealing seam defect, and the proximity switch which is originally mutually sensed with the trigger rod senses shift information of the trigger rod to act so as to timely control the stop of the longitudinal heat sealing machine of the plastic bag. The invention has the characteristics of simple structure, sensitive action, improved production efficiency and product quality assurance, can effectively replace heavy work of a detection worker, quickly find out the heat sealing quality defect of the plastic bag, and timely control equipment to stop so as to remove unqualified products.
Description
Technical Field
The invention relates to the technical field of plastic machinery, in particular to a heat sealing quality on-line detection device of a plastic bag longitudinal heat sealing production line.
Background
The openings for holding articles in the plastic bag are mostly arranged on the upper surface and the lower surface of the plastic bag. A rectangular plastic bag is characterized in that an opening for containing articles is arranged at one side of the central vertical line of the plastic bag when the rectangular plastic bag is longitudinally used, the heat sealing process of the plastic bag adopts a plastic film continuous longitudinal heat sealing technology and uses a longitudinal heat sealing knife to complete the heat sealing operation, and the opening for containing articles is a continuous slit reserved at one side of the central vertical line of the plastic bag.
The technological process is as follows: firstly, the two longitudinal sides of two layers of continuously moving plastic films are heat-sealed on a longitudinal heat sealing machine, meanwhile, the slit reserved for holding articles is not heat-sealed, and then the two transverse sides are heat-sealed on another device, and a finished product is cut. In the bag making process, the plastic film is always in a heated state and continuously moves from bottom to top, and in the production process, quality defects such as unstable heat sealing, holes in the heat sealing, plastic film scalding, plastic film deformation and the like can be caused due to factors such as tension change of the plastic film, pressure change of a heat sealing knife, movement speed change of the plastic film, material defects and the like. Such quality defective bags are typically identified and rejected by the inspector by manual eye force, thus requiring a high level of attention from the inspector to prevent defective products from passing through. However, the quality defect is identified by manual force, and the unqualified products are removed, so that time and labor are wasted, and the inspection workers consume great effort to pick, but the qualification rate of the products is difficult to ensure.
Disclosure of Invention
The invention aims to solve the technical problem of providing the on-line detection device for the heat sealing quality of the plastic bag longitudinal heat sealing assembly line, which has the characteristics of simple structure, sensitive action, capability of rapidly finding out the heat sealing quality defect, timely controlling equipment shutdown and ensuring the product quality.
In order to solve the technical problems, the invention adopts the following technical scheme:
an on-line detection device for heat sealing quality of a plastic bag longitudinal heat sealing assembly line is characterized in that the detection device senses displacement information of a trigger rod by using a proximity switch and controls the working state of a plastic bag longitudinal heat sealing machine; in the process of upward continuous operation of the plastic bag, the trigger head of the trigger rod applies a transverse outward pushing force to the longitudinal heat sealing seam in the plastic bag, the trigger head and the trigger rod lose resistance and shift outwards in the area of the longitudinal heat sealing seam defect, and the proximity switch which is originally mutually sensed with the trigger rod senses shift information of the trigger rod to act so as to timely control the stop of the longitudinal heat sealing machine of the plastic bag.
The device for detecting the heat sealing quality of the plastic bag longitudinal heat sealing assembly line on line comprises a trigger rod, a proximity switch, a trigger rod fixing sliding plate, a sliding seat plate and a sliding seat; the trigger rod fixing sliding plate and the sliding seat plate are sleeved on the sliding seat, and the sliding seat is arranged in front of the heat-sealing plastic bag pulled upwards by the plastic bag longitudinal heat sealing machine; the trigger rod is in a bent shape, one end of the trigger rod is fixed on the trigger rod fixing sliding plate, the other end of the trigger rod is provided with an arc-shaped trigger head, the trigger rod is provided with a reset spring, and the action force of the reset spring enables the trigger head to be elastically pressed at the longitudinal heat sealing joint of the heat sealing plastic bag; the proximity switch is fixed on the slide through the slide plate, one end of the proximity switch is mutually induced with the trigger head, and an electric contact of the proximity switch is connected with a starting switch of the plastic bag longitudinal heat sealing machine through a signal wire.
The on-line detection device for the heat sealing quality of the plastic bag longitudinal heat sealing assembly line is characterized in that the reset spring is a torsion spring.
According to the on-line detection device for heat sealing quality of the plastic bag longitudinal heat sealing assembly line, the section of the sliding seat is rectangular.
The on-line detection device for heat sealing quality of the plastic bag longitudinal heat sealing assembly line is characterized in that the trigger head is in a circular ring shape.
The plastic bag longitudinal heat sealing machine is provided with a trigger rod and an approaching quick-closing device. The right end of the trigger rod and the proximity switch are arranged in front of the heat-sealing plastic bag which is pulled upwards, and the left end of the trigger rod is inserted into the heat-sealing plastic bag from the opening of the heat-sealing plastic bag for containing articles and is contacted with the longitudinal heat-sealing seam in the plastic bag; in the technical scheme, the left end of the trigger rod is disconnected or not firmly shifted outwards in the plastic bag due to the heat sealing seam, and the proximity switch receives shifting information to control the starting switch of the longitudinal heat sealing machine of the plastic bag.
The invention has simple structure and sensitive action, can effectively replace heavy work of a detection worker, can quickly find out the heat sealing quality defect of the plastic bag, timely control equipment to stop, remove unqualified products and ensure the product quality.
Drawings
FIG. 1 is a schematic diagram of the structure of a finished heat-sealed plastic bag according to the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural view of the present invention.
The reference numerals of the components in the drawings are respectively expressed as follows: 1. left side heat seal seam, 2, upper plastic film, 3, the opening that the finished product plastic bag held the article, 4, right side heat seal seam, 5, horizontal heat seal seam, 6, lower floor plastic film, 7, the trigger lever, 8, reset spring, 9, proximity switch, 10, trigger head, 11, parting line between two heat seal plastic bags, 12, slide, 13, right side heat seal plastic bag, 14, middle heat seal plastic bag, 15, left side heat seal plastic bag, 16, trigger lever fixed slide, 17, set screw, 18, slide bedplate, 19, set screw, 20, signal line, 21, heat seal have disconnected left side heat seal seam.
Detailed Description
Referring to fig. 3, the plastic bag making machine adopts a continuous heat sealing technology of a longitudinal heat sealing knife and a plastic film technology. The plastic film is always in a heated state and continuously moves from bottom to top, and the opening 3 for containing articles of the heat-sealing plastic bag is a continuous slit which is longitudinally cut. The proximity switch 9 of the invention adopts SN04-N model, the object which can be detected by the proximity switch must be a metal object, belongs to an inductive proximity switch, and consists of an LC high-frequency oscillator and an amplifying processing circuit.
The trigger head 10 of the trigger lever 7 is inserted into the heat-seal plastic bag from the article holding opening 3 of the heat-seal plastic bag and is contacted with the longitudinal heat seal seam in the bag, and the sensing end of the proximity switch 9 is contacted with the trigger lever 7. If the longitudinal heat seal of the plastic bag on the production line is firm and intact, the trigger head 10 is always blocked in the longitudinal heat seal and does not generate displacement. Once the phenomenon that the heat seal is not firm occurs in the broken area of the heat seal, namely, the phenomenon that the heat seal is not firm is generated, (see the left heat seal 21 that the heat seal above the right heat seal plastic bag 13 is not firm and has broken in fig. 3), the trigger head 10 is pushed by the reset spring 8 in the plastic bag, moves out from the weak part of the heat seal, the proximity switch 9 senses the information of the displacement of the trigger rod 7, the start switch of the plastic bag longitudinal heat sealing machine is controlled, the assembly line is stopped in time, and the plastic bag longitudinal heat sealing machine is started again after unqualified products are removed, and production is continued.
The shape of the trigger rod 7 can also be arc-shaped, one end of the arc-shaped trigger rod is fixed on the sliding seat plate 18, and the other end extends into the opening 3 for containing articles to prop against the heat sealing seam, so that the same function can be realized.
Claims (4)
1. A plastic bag longitudinal heat seal assembly line heat sealing quality on-line measuring device which characterized in that: the detection device senses displacement information of the trigger rod (7) by using the proximity switch (9) and controls the working state of the plastic bag longitudinal heat sealing machine; in the process of upward continuous running of the plastic bag, a trigger head (10) of a trigger rod (7) applies a transverse outward pushing force to a longitudinal heat sealing seam in the plastic bag, the trigger head (10) and the trigger rod (7) lose resistance and shift outwards in a region of the longitudinal heat sealing seam defect, and a proximity switch (9) which is originally mutually sensed with the trigger rod senses shift information of the trigger rod (7) to act so as to timely control the shutdown of a longitudinal heat sealing machine of the plastic bag;
the detection device comprises a trigger rod (7), a proximity switch (9), a trigger rod fixing sliding plate (16), a sliding seat plate (18) and a sliding seat (12); the trigger rod fixing sliding plate (16) and the sliding seat plate (18) are sleeved on the sliding seat (12), and the sliding seat (12) is arranged in front of an upward-pulled heat-sealing plastic bag of the plastic bag longitudinal heat sealing machine; the trigger rod (7) is in a bent shape, one end of the trigger rod is fixed on the trigger rod fixing sliding plate (16), the other end of the trigger rod is provided with an arc-shaped trigger head (10), the trigger rod (7) is provided with a reset spring (8), and the action force of the reset spring enables the trigger head (10) to be elastically pressed at a longitudinal heat sealing seam of the heat sealing plastic bag; the proximity switch (9) is fixed on the sliding seat (12) through the sliding seat plate (18), one end of the proximity switch (9) is mutually induced with the trigger head (10), and an electric contact of the proximity switch (9) is connected with a starting switch of the plastic bag longitudinal heat sealing machine through a signal wire (20).
2. The on-line detection device for heat sealing quality of plastic bag longitudinal heat sealing production line according to claim 1, wherein: the return spring (8) is a torsion spring.
3. The on-line detection device for heat sealing quality of plastic bag longitudinal heat sealing production line according to claim 2, wherein: the cross section of the sliding seat (12) is rectangular.
4. The on-line detection device for heat sealing quality of plastic bag longitudinal heat sealing production line according to claim 3, wherein: the trigger head (10) is in a circular ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810739829.1A CN108859261B (en) | 2018-07-06 | 2018-07-06 | Online detection device for heat sealing quality of plastic bag longitudinal heat sealing assembly line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810739829.1A CN108859261B (en) | 2018-07-06 | 2018-07-06 | Online detection device for heat sealing quality of plastic bag longitudinal heat sealing assembly line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108859261A CN108859261A (en) | 2018-11-23 |
| CN108859261B true CN108859261B (en) | 2023-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810739829.1A Active CN108859261B (en) | 2018-07-06 | 2018-07-06 | Online detection device for heat sealing quality of plastic bag longitudinal heat sealing assembly line |
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| CN (1) | CN108859261B (en) |
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| WO2015147857A1 (en) * | 2014-03-28 | 2015-10-01 | The Glad Products Company | Improved seals for stretchable films |
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| JP2005067062A (en) * | 2003-08-26 | 2005-03-17 | Toppan Printing Co Ltd | Heat-sealing bag making machine |
| JP2005088947A (en) * | 2003-09-18 | 2005-04-07 | Pigeon Corp | Packaging apparatus |
| CN2849699Y (en) * | 2005-10-09 | 2006-12-20 | 上海现代药物制剂工程研究中心有限公司 | Puncture tester for soft packed plastic infusion bag |
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| CN102706752A (en) * | 2012-07-04 | 2012-10-03 | 楚天科技股份有限公司 | On-line soft infusion bag heat-seal strength detection device and soft infusion bag production line |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108859261A (en) | 2018-11-23 |
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Address after: 051130 No.405 Yuanshi street, Yuanshi County, Shijiazhuang City, Hebei Province Applicant after: Hebei Fangda New Materials Co.,Ltd. Address before: 051130 No.405 Yuanshi street, Yuanshi County, Shijiazhuang City, Hebei Province Applicant before: HEBEI FANGDA PACKAGING CO.,LTD. |
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