Packing material welding quality detection device
By setting up a detection unit on the detection electrode that can be independently controlled to turn on and off, and using capacitance changes to detect welding quality, the problem of high cost and low accuracy in the welding quality detection of strip packaging bags in the prior art is solved, and a fast and accurate detection effect is achieved.
Patent Information
- Application Number
- CN202423065344.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing technologies for inspecting the welding quality of strip packaging bags are costly, have low precision, and are not accurate enough, so improvements are urgently needed.
The system employs a first and second detection electrode arranged at intervals. Each electrode has a detection section that can be independently controlled to switch on and off. The welding quality is judged by scanning the electrode grid to detect changes in capacitance, and the presence of bulges is determined by the changes in capacitance.
It achieves low-cost, high-precision, and rapid welding quality inspection. The inspection speed is fast and efficient, the structure is simple, mechanical wear is avoided, and the service life of the device is extended.
Smart Images
Figure CN223597582U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to food, medicine packing equipment especially, relate to a kind of package material welding quality detection device. BACKGROUND
[0002] With strip-shaped packing bag (abbreviation strip bag) as example, it is formed by two ends hot melt welding after folding through composite film material, its structure is as shown in Figure 1 As shown in Figure 2 As shown in Figure 3 As shown in
[0003] The method for strip bag welding quality detection currently mainly has X-ray imaging detection and ultrasonic detection, there are defects such as high cost, low detection precision and inaccurate detection, and it is urgent to improve. UTILITY MODEL CONTENT
[0004] The utility model solves the technical problem of overcoming the prior art, and provides a package material welding quality detection device with simple structure, low cost, high detection precision and fast detection speed.
[0005] The utility model further provides a detection method of the above package material welding quality detection device.
[0006] To solve the above technical problem, the utility model adopts the following technical scheme:
[0007] A package material welding quality detection device, comprising first detection electrode and second detection electrode arranged at intervals, detection area is formed between the first detection electrode and the second detection electrode, the first detection electrode is provided with at least two first detection parts that can control on-off respectively, the second detection electrode is provided with at least two second detection parts that can control on-off respectively, the first detection part and the second detection part have overlapping part in the orthographic projection of the detection area.
[0008] As further improvement of the above technical scheme: the first detection part and the second detection part are both strip-shaped parts, and the first detection part and the second detection part are cross-distributed.
[0009] As further improvement of the above technical scheme: each first detection part is arranged in parallel, and each second detection part is arranged in parallel.
[0010] As further improvement of the above technical scheme: the distance between adjacent two first detection parts is equal, and the distance between adjacent two second detection parts is equal.
[0011] As a further improvement of the above technical solution: the first detection part is etched by the first detection electrode, and the second detection part is etched by the second detection electrode.
[0012] As a further improvement of the above technical solution: the first detection electrode and the second detection electrode are copper electrodes.
[0013] As a further improvement of the above technical solution: the first detection electrode and the second detection electrode are arranged in parallel.
[0014] As a further improvement of the above technical solution: the package material welding quality detection device further comprises a first analog multiplexer, a second analog multiplexer and a control module, the first analog multiplexer is electrically connected with each first detection part, the second analog multiplexer is electrically connected with each second detection part, and the first analog multiplexer and the second analog multiplexer are electrically connected with the control module.
[0015] As a further improvement of the above technical solution: the control module is a single-chip microcomputer.
[0016] A detection method of the above package material welding quality detection device, comprising the following steps:
[0017] S1, the welding area of the package material is placed in the detection area between the first detection electrode and the second detection electrode;
[0018] S2, the on-off of each first detection part and each second detection part is controlled respectively, and the welding quality at the corresponding position of each overlapping part is detected one by one; if all the detection capacitances corresponding to the overlapping parts are located in the set interval, it indicates that the welding quality is qualified, and if the detection capacitance of any one overlapping part is not in the set interval, it indicates that the welding quality is unqualified and the detection is directly ended.
[0019] Compared with the prior art, the package material welding quality detection device has the following advantages:
[0020] The package material welding quality detection device disclosed by the utility model, multiple first detection parts and second detection parts are arranged on the first detection electrode and the second detection electrode respectively, each first detection part and second detection part can control on-off respectively, and the orthographic projection of the welding area on the package material has overlapping parts, the size of the capacitance between two detection parts corresponding to the overlapping parts can be detected by scanning the electrode grid to judge whether there is a bulge, so that the small bulge of the welding area of the package material is detected, the detection speed is fast, the detection efficiency is high, the whole device structure is simple, and the cost is much lower than X-ray forming detection and ultrasonic detection.
[0021] The detection method of the packaging material welding quality detection device disclosed by the utility model judges whether there is a bulge by scanning the electrode grid, detecting the capacitance size between the two detection parts corresponding to the overlapping part, is fast in detection speed, is high in detection efficiency, and is electric scanning detection without mechanical abrasion, which is beneficial to prolong the service life of the device.
[0022] Other features and advantages of the utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 Is the structural schematic diagram of the strip-shaped packaging bag, a is the front view, and b is the sectional view.
[0024] Figure 2 Is the structural schematic diagram of the composite film material for manufacturing the strip-shaped packaging bag.
[0025] Figure 3 Is the structural schematic diagram after welding of the composite film material, a is the state of good welding, and b is the state of unqualified welding.
[0026] Figure 4 Is the detection structural schematic diagram of the utility model.
[0027] Figure 5 Is Figure 4 The simplified schematic diagram.
[0028] Figure 6 Is the detection principle schematic diagram of the utility model
[0029] Figure 7 Is the structural schematic diagram of the packaging material welding quality detection device of the utility model.
[0030] Figure 8 Is the three-dimensional structural schematic diagram of the first detection electrode and the second detection electrode in the utility model.
[0031] Figure 9 Is the front projection structural schematic diagram of the first detection electrode and the second detection electrode in the utility model in the welding area.
[0032] The various reference numerals in the drawing represent:
[0033] 1, first detection electrode, 11, first detection part, 2, second detection electrode, 21, second detection part, 3, packaging material, 31, welding area, 3a, aluminum film, 3b, PVC film, 4, overlapping part, 51, first analog multiplexer, 52, second analog multiplexer, 53, control module. DETAILED DESCRIPTION
[0034] In the description of the utility model, it is understood that the directions or position relations of the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the utility model.
[0035] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
[0036] In the utility model, unless otherwise specified and limited, the terms "assembly", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication or interaction relationship between two elements. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.
[0037] The utility model will be further described in detail below in combination with the drawings and specific embodiments.
[0038] Embodiment one
[0039] Figures 4 to 9 An embodiment of the package material welding quality detection device of the utility model is shown, the package material welding quality detection device of the embodiment comprises first detection electrode 1 and second detection electrode 2 that are spaced apart, and the first detection electrode 1 and the second detection electrode 2 form a detection zone between them, the first detection electrode 1 is provided with at least two first detection parts 11 that can control on-off respectively, the second detection electrode 2 is provided with at least two second detection parts 21 that can control on-off respectively, and the first detection part 11 and the second detection part 21 have an overlapping portion 4 in the orthographic projection of the detection zone.
[0040] Specific reference is made to Figure 4, when detecting, the welding area 31 of the package material 3 is arranged between the detection area formed by the first detection electrode 1 and the second detection electrode 2. Since the package material 3 is folded by the composite film and welded at both ends, the two layers of aluminum film 3a at the interface of the package material 3 are electrically conductive, and the PVC film 3b has little effect on the capacitance size between the first detection electrode 1 and the second detection electrode 2, which can be ignored, so Figure 4 It can be simplified as Figure 5 .
[0041] Specifically refer to Figure 5 , the first detection electrode 1, the second detection electrode 2 and the aluminum film 3a form two series capacitors. When the thickness of the aluminum film 3a changes, the capacitance of the capacitor changes, which becomes the key of detection.
[0042] According to the calculation formula of the capacitor: C=ε*ε0*S / d;
[0043] Wherein ε0 is a constant, and in the embodiment, the value is 8.86*10 -12 F / M, S is the opposite area of the electrode, and d is the distance between the electrodes.
[0044] Specifically refer to Figure 6 , then C1=ε*ε0*S1 / d1, C2=ε*ε0*S 2 / d2;
[0045] Wherein d1 and d2 are the distances between the first detection electrode 1, the second detection electrode 2 and the aluminum film 3a, respectively;
[0046] The total capacitance C=C1*C2 / (C1+C2)=ε*ε0*S1 / (d1+d2);
[0047] Current I=U*2*Pi*f*C=2*Pi*f*ε*ε0*S1*U / (d1+d2);
[0048] Wherein U is the voltage of the power supply, and f is the frequency of the power supply;
[0049] It can be seen that the total capacitance is only related to the electrode area S1 and d1+d2, and has nothing to do with the position of the aluminum film 3a between the first detection electrode 1 and the second detection electrode 2. When the welding part exists bulge, it is equivalent to Figure 6 The thickness of the aluminum film 3a changes, and the corresponding d1+d2 changes, specifically, the value of d1+d2 becomes smaller.
[0050] The thickness of the welding site is generally the thickness of the two-layer composite film, about 50 um, plus the uneven factors such as the indentation of the film welding site, the distance between the first detection electrode 1 and the second detection electrode 2 of the capacitor is preferably ≥500 um, assuming d0=500 um, the current I change of the current detection level is 2%, which can be detected, then the detection accuracy is equal to 500*2% =10 um, which means that the thickness change caused by the void can be detected. Of course, this refers to the accuracy of detecting thickness change, if the area of the electrode is 1mm 2 , then 1mm 2 can be detected when the electrode area is 10 um, which is a conservative estimate. The precision can be further improved by using electrode scanning and signal digital processing. At the same time, it takes about 10 ms to detect a 20mm*60mm area, which can fully match the previous detection of the strip bag filling machine.
[0051] The package material welding quality detection device of the embodiment is provided with a plurality of first detection parts 11 and second detection parts 21 on the first detection electrode 1 and the second detection electrode 2 respectively, each first detection part 11 and second detection part 21 can be controlled to turn on and off, and the orthographic projection of the welding area 31 on the package material 3 has an overlapping part 4, the size of the capacitance between the two detection parts corresponding to the overlapping part 4 can be detected by scanning the electrode grid, to determine whether there is a bulge, so as to realize the detection of the small bulge of the welding area 31 of the package material 3, and the detection speed is fast, the detection efficiency is high, the whole device structure is simple, and the cost is much lower than that of X-ray forming detection and ultrasonic detection.
[0052] For details Figures 7 to 9 , as a preferred embodiment, the first detection part 11 and the second detection part 21 are both strip-shaped parts, and the first detection part 11 and the second detection part 21 are vertically distributed, so as to form a plurality of regular rectangular overlapping parts 4 in the welding area 31 of the package material 3, or in other words, the welding area 31 is divided into a plurality of rectangular detection positions. For example, the first detection part 11 and the second detection part 21 are both 30, and the width is 1mm, so as to form 900 square overlapping parts 4 of 1mm*1mm. The more the number of overlapping parts 4, the wider the distribution range, and the smaller the area of a single overlapping part 4, the more conducive to improving the accuracy and comprehensiveness of detection. Of course, in other embodiments, the first detection part 11 and the second detection part 21 can also adopt other forms, and the angle of intersection can also be adjusted.
[0053] As a preferred embodiment, each first detection part 11 is arranged in parallel, and each second detection part 21 is arranged in parallel, which is convenient for forming regular overlapping parts 4 in the welding area 31.
[0054] As a preferred embodiment, the distance between two adjacent first detection parts 11 is equal, and the distance between two adjacent second detection parts 21 is equal, that is, the first detection parts 11 and the second detection parts 21 are uniformly distributed on the first detection electrode 1 and the second detection electrode 2, which is conducive to realizing the uniform distribution of the overlapping parts 4 in the welding area 31 and ensuring the uniformity and comprehensiveness of the detection position.
[0055] As a preferred embodiment, the first detection part 11 is etched by the first detection electrode 1, and the second detection part 21 is etched by the second detection electrode 2, which is conducive to improving the machining precision of the first detection part 11 and the second detection part 21, especially in the case of a large number of first detection parts 11 and second detection parts 21 with narrow width, thereby improving the detection precision. Of course, in other embodiments, the first detection part 11 and the second detection part 21 can also be machined by other means.
[0056] As a preferred embodiment, the first detection electrode 1 and the second detection electrode 2 are copper electrodes. The copper electrode has good conductivity and is easy to process a plurality of first detection parts 11 and second detection parts 21. Of course, in other embodiments, the first detection electrode 1 and the second detection electrode 2 can also use other conductive materials, such as aluminum, etc.
[0057] As a preferred embodiment, the first detection electrode 1 and the second detection electrode 2 are arranged in parallel. Specifically, the first detection electrode 1 is located above the second detection electrode 2, the first detection part 11 is arranged on the lower surface of the first detection electrode 1, and the second detection part 21 is arranged on the upper surface of the second detection electrode 2. Since the first detection electrode 1 and the second detection electrode 2 are arranged in parallel, the distance between the first detection electrode 1 and the second detection electrode 2 is equal in the case of qualified welding quality of the packaging material 3, which is conducive to reducing the detection difficulty. For details, see Figure 8 , when detecting, the welding area 31 of the packaging material 3 is placed parallel between the first detection electrode 1 and the second detection electrode 2, which is conducive to ensuring the accuracy of the detection result.
[0058] For details, see Figure 7 In this embodiment, the packaging material welding quality detection device further comprises a first analog multiplexer 51, a second analog multiplexer 52, and a control module 53. The first analog multiplexer 51 is electrically connected with each first detection part 11, the second analog multiplexer 52 is electrically connected with each second detection part 21, and the first analog multiplexer 51 and the second analog multiplexer 52 are electrically connected with the control module 53. As a preferred embodiment, the control module 53 is a single-chip microcomputer. That is, in this embodiment, the first analog multiplexer 51, the second analog multiplexer 52, and the control module 53 are used to control the on-off of each first detection part 11 and second detection part 21 respectively, and the electrode scanning of 900 square overlapping parts 4 is completed in turn, which is faster and lower in cost compared with X-ray forming detection and ultrasonic detection.
[0059] Embodiment two
[0060] The detection method of the package material welding quality detection device of the embodiment comprises the following steps:
[0061] S1, the welding area 31 of the package material 3 is placed in the detection area between the first detection electrode 1 and the second detection electrode 2;
[0062] S2, the on-off electricity of each first detection part 11 and each second detection part 21 is controlled respectively, and the welding quality at the corresponding position of each overlapping part 4 is detected one by one; if all the detection capacitances corresponding to the overlapping parts 4 are located in the set interval, it indicates that the welding quality is qualified, and if the detection capacitance of any one overlapping part 4 is not in the set interval, it indicates that the welding quality is unqualified and the detection is directly ended.
[0063] The detection method of the package material welding quality detection device of the embodiment detects the capacitance size between the two detection parts corresponding to the overlapping part 4 by scanning the electrode grid, to judge whether there is a bulge, the detection speed is fast, the detection efficiency is high, and the electric scanning detection has no mechanical wear, which is beneficial to prolong the service life of the device.
[0064] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model. Any skilled person in the art can make many possible changes and modifications to the utility model technical scheme by using the disclosed technical content, or modify equivalent embodiments with equivalent changes without departing from the scope of the utility model technical scheme. Therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model technical scheme should fall within the scope of the utility model technical scheme protection.
Claims
1. A package material welding quality detection device characterized by comprising: The application relates to a detection electrode, which comprises first detection electrodes (1) and second detection electrodes (2) arranged at intervals, a detection area being formed between the first detection electrodes (1) and the second detection electrodes (2), the first detection electrodes (1) being provided with at least two first detection parts (11) capable of being controlled to turn on and off electricity respectively, the second detection electrodes (2) being provided with at least two second detection parts (21) capable of being controlled to turn on and off electricity respectively, and the first detection parts (11) and the second detection parts (21) having an overlapping part (4) in the orthographic projection of the detection area.
2. The package material weld quality detection apparatus according to claim 1, characterized by: The first detection parts (11) and the second detection parts (21) are strip-shaped parts, and the first detection parts (11) and the second detection parts (21) are cross-distributed.
3. The package material weld quality detection apparatus according to claim 2, characterized by: The first detection parts (11) are arranged in parallel, and the second detection parts (21) are arranged in parallel.
4. The package material weld quality detection apparatus according to claim 3, characterized by: The distance between two adjacent first detection parts (11) is equal, and the distance between two adjacent second detection parts (21) is equal.
5. The package material weld quality detection apparatus according to any one of claims 1 to 4, characterized by: The first detection parts (11) are etched by the first detection electrodes (1), and the second detection parts (21) are etched by the second detection electrodes (2).
6. The package material weld quality detection apparatus of claim 5, wherein: The first detection electrodes (1) and the second detection electrodes (2) are copper electrodes.
7. The package material weld quality detection apparatus according to any one of claims 1 to 4, characterized by: The first detection electrodes (1) and the second detection electrodes (2) are arranged in parallel.
8. The package material weld quality detection apparatus according to any one of claims 1 to 4, characterized by: The application further comprises a first analog multiplexing switch (51), a second analog multiplexing switch (52) and a control module (53), the first analog multiplexing switch (51) being electrically connected with the first detection parts (11), the second analog multiplexing switch (52) being electrically connected with the second detection parts (21), and the first analog multiplexing switch (51) and the second analog multiplexing switch (52) being electrically connected with the control module (53).
9. The package material weld quality detection apparatus of claim 8, wherein: The control module (53) is a single-chip microcomputer.