Plastic bag edge sealing strength and defect detector

Abstract

The utility model relates to the technical field of plastic bag processing, in particular to a plastic bag edge sealing strength and defect detector which comprises a detection box body, a detection lamp panel is embedded in the top of the detection box body, a lower perspective plate connected with the detection box body is arranged above the detection lamp panel, and pressing rollers capable of moving in a lifting mode are arranged on the two sides of the top of the lower perspective plate. A traction structure is arranged on the outer side of one of the pressing rollers, the traction structure comprises a traction roller and two guide rollers, the two guide rollers are arranged between the traction roller and the detection lamp panel and can integrally rotate in the circumferential direction, the traction roller is located on a rotating track of the two guide rollers, and the traction roller is arranged at the position lower than the top end face of the detection lamp panel; and the two guide rollers are respectively arranged on the upper side and the lower side of the detection lamp panel. According to the utility model, high-precision edge sealing strength and edge sealing defect detection can be conveniently carried out on a long plastic bag at one time.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag processing, in particular to a plastic bag edge sealing strength and defect detector. Background Technique

[0002] Plastic bags are bags mainly made of plastics (common plastics include polypropylene, polyester, nylon, etc.), and are essential items in people's daily lives. The strength of the plastic bag edge sealing is a very important factor determining the length of time for sealing internal items in the plastic bag. Especially for foods with a shelf life, if the sealing strength is insufficient, the food sealed in the plastic bag is prone to spoilage, and thus the required shelf life cannot be achieved. When detecting the edge sealing of existing plastic bags, generally, the edge sealing position of the plastic bag irradiated by the lamp at the bottom is observed from above. The edge sealing strength can be observed by observing the depth of its shadow, and the edge sealing defects can be observed by observing whether there are air bubbles in the shadow. However, during the detection process, it is necessary to manually move the edge sealing of the plastic bag from above the lamp cover and observe at the same time. During the process, if the distance between the edge sealing of the plastic bag and the lamp is prone to fluctuate, and when detected by the human eye, the depth of its shadow is prone to change. At the same time, it is necessary to manually move the plastic bag. For a relatively long plastic bag edge sealing, it is more difficult to ensure the distance from the lamp. Therefore, a plastic bag edge sealing strength and defect detector is designed to facilitate the detection of the edge sealing strength and edge sealing defects of a relatively long plastic bag at one time with high precision. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the utility model provides a plastic bag edge sealing strength and defect detector, which is convenient for detecting the edge sealing strength and edge sealing defects of a relatively long plastic bag at one time with high precision.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the utility model provides the following technical solutions: A plastic bag edge sealing strength and defect detector includes a detection box body. A detection lamp board is embedded and installed at the top of the detection box body. A lower perspective board connected to the detection box body is arranged above the detection lamp board. Pressing rollers that can be lifted and moved are arranged on both sides of the top of the lower perspective board. A traction structure is arranged outside one of the pressing rollers. The traction structure includes a traction roller and two guiding rollers. The two guiding rollers are arranged at the position between the traction roller and the detection lamp board and can rotate circumferentially as a whole. The traction roller is located on the rotation tracks of the two guiding rollers. The traction roller is arranged at a position lower than the top end surface of the detection lamp board. The two guiding rollers are respectively arranged on the upper and lower sides of the detection lamp board.

[0007] Preferably, it further includes a lifting mechanism, which includes two lifting drive cylinders separately installed on both sides of the detection box body. The top ends of the two lifting drive cylinders are fixedly installed with lifting slide bars, and both ends of the two pressure rollers are rotatably connected to the two lifting slide bars respectively.

[0008] Preferably, it further includes a buffer assembly, which is arranged at the rotational connection between the pressure roller and the lifting slide bar. The buffer assembly includes a vertical buffer slot opened on the lifting slide bar, a vertical buffer slider is slidably fitted in the vertical buffer slot, the pressure roller is rotatably connected to the vertical buffer slider, and a compression spring is arranged between the top of the vertical buffer slider and the inner top wall of the vertical buffer slot.

[0009] Preferably, it further includes a circumferential rotation mechanism for adjusting the angles of the two guide rollers. The axial rotation mechanism includes two rotating bars rotatably connected above the outside of the detection box body, the two guide rollers are symmetrically rotatably connected to the two rotating bars, and it further includes an adjustment motor for driving the rotating bars to rotate.

[0010] Preferably, it further includes a traction drive mechanism for driving the traction roller to rotate. The traction drive mechanism includes a support frame bar fixedly installed on one side of the detection box body, the traction roller is rotatably connected to the support frame bar, a traction motor is fixedly installed on the support frame bar, and the output shaft of the traction motor is connected to the traction roller through a synchronous belt.

[0011] Preferably, it further includes an upper perspective plate arranged directly above the lower perspective plate. The upper perspective plate and the lower perspective plate are fixedly connected to the detection box body through a frame. Both ends of the lifting slide bar are slidably and guidingly fitted with the frame, the rotating bar is rotatably connected to the frame, and the adjustment motor is fixedly installed on the frame.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a plastic bag edge sealing strength and defect detector, which has the following beneficial effects:

[0014] The plastic bag edge sealing strength and defect detector can prevent the plastic bag from directly contacting the detection lamp board by setting a lower perspective board above the detection lamp board, and can avoid the plastic bag from changing due to heat generated during long-term use. By setting two pressure rollers that can move up and down, it is convenient to press the plastic bag on the lower perspective board, so as to facilitate the detection of the plastic bag closely attached to the lower perspective board. When the plastic bag is relatively long, one end of the plastic bag can first bypass the lower part of the two pressure rollers and pass through between the two guide rollers, then pass above the traction roller, and then rotate the two guide rollers so that one of the guide rollers above presses the plastic bag against the traction roller. Then, the two pressure rollers press the plastic bag on the lower perspective board. At the same time, the guide roller below rotates to a height higher than the lower perspective board and guides the plastic bag. Then, the traction roller rotates, so that the plastic bag can be continuously pulled, so that the edge of the plastic bag closely adheres to the lower perspective board and continuously passes through. The detection accuracy is high, fast and convenient. The plastic bag edge sealing strength and defect detector is convenient for detecting the edge sealing strength and edge sealing defects of a relatively long plastic bag at one time with high accuracy. Brief Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the overall decomposition of the present invention;

[0016] Figure 2 For the present invention Figure 1 is a partial enlarged structural diagram at A in

[0017] Figure 3 is a schematic structural diagram of the overall of the present invention;

[0018] Figure 4 is a schematic structural diagram of the overall decomposition of the present invention from other perspectives;

[0019] Figure 5 is a schematic structural diagram of the overall of the present invention from other perspectives;

[0020] Figure 6 is a schematic structural diagram of the overall of the present invention from another perspective;

[0021] Figure 7 For the present invention Figure 6 is a partial enlarged structural diagram at B in

[0022] Reference numerals in the drawings: 1, detection box body; 2, detection lamp board; 3, lower perspective board; 4, upper perspective board; 5, frame; 6, pressure roller; 7, lifting slide bar; 8, lifting driving cylinder; 9, vertical buffer card slot; 10, vertical buffer slider; 11, compression spring; 12, guide roller; 13, traction roller; 14, support frame bar; 15, traction motor; 16, synchronous belt; 17, adjustment motor; 18, rotating bar. Detailed Description of the Embodiment

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment:

[0025] Please refer to Figure 1-7 , a plastic bag edge sealing strength and defect detector, including a detection box body 1. A detection lamp board 2 is embedded and installed at the top of the detection box body 1. Above the detection lamp board 2, there is a lower perspective plate 3 fixedly connected to the detection box body 1. On both sides of the top of the lower perspective plate 3, there are pressure rollers 6 that can be lifted and moved. On the outside of one of the pressure rollers 6, there is a traction structure. The traction structure includes a traction roller 13 and two guide rollers 12. The two guide rollers 12 are arranged between the traction roller 13 and the detection lamp board 2 and can rotate circumferentially as a whole. The traction roller 13 is located on the rotation tracks of the two guide rollers 12. The traction roller 13 is arranged at a position lower than the top end surface of the detection lamp board 2. The two guide rollers 12 are respectively arranged on the upper and lower sides of the detection lamp board 2.

[0026] Specifically, it further includes a lifting mechanism. The lifting mechanism includes two lifting drive cylinders 8 respectively installed on both sides of the detection box body 1. The tops of the two lifting drive cylinders 8 are fixedly installed with lifting slide bars 7. The two ends of the two pressure rollers 6 are respectively rotatably connected to the two lifting slide bars 7. By the two lifting drive cylinders 8 and the two lifting slide bars 7, the output shafts of the two lifting drive cylinders 8 can be simultaneously telescoped and extended, so as to adjust the heights of the two lifting slide bars 7 and the heights of the two pressure rollers 6, thereby facilitating the adjustment of the height of the two pressure rollers 6 from the lower perspective plate 3.

[0027] Specifically, it further includes a buffer assembly. The buffer assembly is arranged at the rotational connection between the pressure roller 6 and the lifting slide bar 7. The buffer assembly includes a vertical buffer slot 9 opened on the lifting slide bar 7. A vertical buffer slider 10 is slidably fitted in the vertical buffer slot 9. The pressure roller 6 is rotatably connected to the vertical buffer slider 10. A compression spring 11 is arranged between the top of the vertical buffer slider 10 and the inner top wall of the vertical buffer slot 9. Through the buffer assembly, it is convenient to buffer the pressure of the pressure roller 6 on the plastic bag, avoiding the situation that the friction force between the plastic bag between the lower perspective plate 3 and the pressure roller 6 is too large due to excessive pressure, resulting in the plastic bag being pulled and deformed. Through the cooperation of the vertical buffer slot 9, the vertical buffer slider 10 and the compression spring 11, it is convenient to perform vertical buffering on the pressure roller 6, thereby facilitating the normal rotation of the pressure roller 6 and ensuring the positive guiding of the pressure roller 6 on the plastic bag.

[0028] Specifically, it also includes a circumferential rotation mechanism for adjusting the angles of the two guide rollers 12, the axial rotation mechanism includes two rotating bars 18 rotatably connected to the upper outer side of the detection box body 1, the two guide rollers 12 are symmetrically connected to the two rotating bars 18, and also includes an adjustment motor 17 for driving the rotating bar 18 to rotate. The adjustment motor 17 is started to make the output shaft of the adjustment motor 17 rotate clockwise or counterclockwise, so as to drive the two guide rollers 12 to rotate clockwise and counterclockwise as a whole. When rotating clockwise, it is convenient to make the upper guide roller 12 abut against the traction roller 13, and make the lower guide roller 12 rotate to the upper part and above the lower perspective plate 3.

[0029] Specifically, it also includes a traction drive mechanism for driving the traction roller 13 to rotate, and the traction drive mechanism includes a support frame bar 14 fixedly installed on one side of the detection box body 1, and the traction roller 13 is rotatably connected to the support frame bar 14, and a traction motor 15 is fixedly installed on the support frame bar 14. The output shaft of the traction motor 15 is connected to the traction roller 13 through a synchronous belt 16. When the traction motor 15 is started, it is convenient to drive the traction roller 13 to rotate through the synchronous belt 16, thereby facilitating the cooperation with the guide roller 12 that presses the plastic bag against the traction roller 13 to pull the plastic bag.

[0030] Specifically, it also includes an upper perspective plate 4 arranged just above the lower perspective plate 3. The upper perspective plate 4 and the lower perspective plate 3 are fixedly connected to the detection box 1 through a frame 5. Both ends of the lifting slide bar 7 are slidingly matched with the frame 5 guides. The rotating bar 18 is rotatably connected to the frame 5. The adjustment motor 17 is fixedly installed on the frame 5. By setting the upper perspective plate 4, a part of the light is filtered out to protect the eyes of the operator and avoid the light that passes through the plastic bag from causing damage to the operator. Through the frame 5, it is convenient to install the frame 5 and the lower perspective plate 3, and it plays a supporting role for the rotating bar 18.

[0031] When in use, one end of the plastic bag is passed around the bottom of the two pressure rollers 6, then passes through the two guide rollers 12, and then passes over the traction roller 13, and then the two pressure rollers 6 are moved downward to press the plastic belt on the lower perspective plate 3, and then the two guide rollers 12 are rotated so that the upper guide roller 12 presses the plastic bag against the traction roller 13, so that the lower guide roller 12 lifts the plastic bag to avoid contact with the ridges of the lower perspective plate 3, and then the traction roller 13 is rotated, and the plastic bag is pulled with the cooperation of the guide roller 12. While pulling, the depth of the shadow of the edge seal of the plastic bag passing through the two pressure rollers 6 and whether there are bubbles in the shadow can be observed. If the shadow becomes lighter, it means that the strength is insufficient, and if there are white spots in the shadow, it means that there are bubbles, that is, the edge seal is not tight and has defects.

[0032] It should be noted that terms such as "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when describing a specific feature, structure or characteristic in combination with an embodiment, implementing such a feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described, is within the knowledge scope of those skilled in the art.

[0033] It should be easily understood that the terms "on", "above", and "over" in the present disclosure should be interpreted in the broadest manner, such that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only include the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0034] In addition, for ease of description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatial relative descriptive terms used in the text may be interpreted accordingly.

[0035] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A plastic bag edge sealing strength and defect detector, characterized by: The invention comprises a detection box (1), wherein a detection light board (2) is embedded in the top of the detection box (1), a lower perspective board (3) connected to the detection box (1) is arranged above the detection light board (2), pressure rollers (6) that can be raised and lowered are arranged on both sides of the top of the lower perspective board (3), a traction structure is arranged on the outer side of one of the pressure rollers (6), the traction structure comprises a traction roller (13) and two guide rollers (12), the two guide rollers (12) are arranged between the traction roller (13) and the detection light board (2) and can rotate circumferentially as a whole, the traction roller (13) is located on the rotation track of the two guide rollers (12), the traction roller (13) is arranged at a position lower than the top end surface of the detection light board (2), and the two guide rollers (12) are arranged on the upper and lower sides of the detection light board (2).

2. The plastic bag edge sealing strength and defect detector according to claim 1, characterized in that: It also includes a lifting mechanism, which includes two lifting drive cylinders (8) respectively installed on both sides of the detection box (1), and the tops of the two lifting drive cylinders (8) are fixedly installed with lifting slides (7), and the two ends of the two pressure rollers (6) are respectively rotatably connected to the two lifting slides (7).

3. The plastic bag edge sealing strength and defect detector according to claim 2, characterized in that: The utility model also comprises a buffer component, wherein the buffer component is arranged at the rotation connection between the pressure roller (6) and the lifting slide bar (7), the buffer component comprises a vertical buffer slot (9) provided on the lifting slide bar (7), a vertical buffer slider (10) is slidably fitted in the vertical buffer slot (9), the pressure roller (6) is rotationally connected to the vertical buffer slider (10), and a compression spring (11) is arranged between the top of the vertical buffer slider (10) and the inner top wall of the vertical buffer slot (9).

4. The plastic bag edge sealing strength and defect detector according to claim 3, characterized in that: The invention also comprises a circumferential rotation mechanism for adjusting the angles of the two guide rollers (12), the circumferential rotation mechanism comprising two rotating bars (18) rotatably connected to the upper outer side of the detection box (1), the two guide rollers (12) being symmetrically rotatably connected to the two rotating bars (18), and an adjustment motor (17) for driving the rotating bars (18) to rotate.

5. The plastic bag edge sealing strength and defect detector according to claim 4, characterized in that: The invention also comprises a traction drive mechanism for driving the traction roller (13) to rotate, the traction drive mechanism comprising a support frame bar (14) fixedly mounted on one side of the detection box (1), the traction roller (13) being rotatably connected to the support frame bar (14), a traction motor (15) being fixedly mounted on the support frame bar (14), and an output shaft of the traction motor (15) being connected to the traction roller (13) by a synchronous belt (16).

6. The plastic bag edge sealing strength and defect detector according to claim 5, characterized in that: It also includes an upper perspective plate (4) arranged directly above the lower perspective plate (3); the upper perspective plate (4) and the lower perspective plate (3) are fixedly connected to the detection box (1) through a frame (5); both ends of the lifting slide bar (7) are slidably matched with the frame (5); the rotating bar (18) is rotatably connected to the frame (5); and the adjusting motor (17) is fixedly installed on the frame (5).

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