Weighing device capable of automatically selecting bag film thickness and using method

Abstract

The invention relates to the technical field of material packaging, in particular to a weighing device capable of automatically selecting the thickness of a bag film and a using method, and the weighing device capable of automatically selecting the thickness of the bag film comprises a weighing module, a judgment module, a switching module, a packaging module and a transportation module. Materials needing to be packaged are weighed and metered through the arranged weighing module, judgment is carried out through the arranged judgment module according to the weighing result, packaging bag films with the corresponding thicknesses are divided and selected for the materials according to different weights, and after the packaging bag films with the corresponding thicknesses are switched to the corresponding stations in time through the switching module, the packaging bag films with the corresponding thicknesses are separated and selected, and then packaging is carried out. The packaging module is used for packaging according to the corresponding heat sealing temperature and heat sealing time, so that the device can use the thickness of the bag film according to needs, the production flexibility is improved, the device can adapt to the weighing requirements of various light materials by supporting seamless switching of the bag films with multiple thicknesses, and the production efficiency is improved. And the material scattering risk is reduced while the packaging material cost is saved.

Description

Technical Field

[0001] The present application relates to the technical field of material packaging, and in particular to a weighing device capable of automatically selecting the thickness of a bag film and a method for using the weighing device. Background Art

[0002] During the material production process, the produced material products are put into bags for packaging. The traditional process of this production process is generally to manually take bags and cooperate with hoppers. However, manual packaging is time-consuming and labor-intensive, weighing is inaccurate, and packaging efficiency is low. The use of automated packaging equipment can greatly improve packaging efficiency. In the existing field of intelligent bag film production, a single thickness of bag film is usually used for material packaging. In the existing technical solutions, most production equipment uses a single roll of bag film with uniform thickness to maintain flatness with a tension roller, and completes cutting and packaging according to a preset length.

[0003] However, most of these solutions have the following drawbacks: If standard or thinner bag films are used uniformly, safety risks may arise. For example, when using thinner bag films (e.g., 0.05mm thick) to package heavy materials (e.g., 20kg), they are prone to rupture. This is especially true during transportation or stacking, where sharp corners of the materials may pierce the bag film, causing material spillage and safety hazards. While the use of uniformly thick bag films can mitigate risks, it also significantly increases material costs. For example, lightweight products (e.g., 1kg) are forced to use thick bag films (e.g., those that can bear 10kg), which will lead to increased material costs. Moreover, most of these solutions still use the adjustment mode when replacing the bag film. If you want to change the thickness of the bag film, you need to stop the machine frequently for manual adjustment, which seriously restricts production continuity.

[0004] The above problems have long plagued the industry, and there is an urgent need for an intelligent solution that can dynamically match bag film thickness and material weight while improving production flexibility. Summary of the Invention

[0005] The present application provides a weighing device and a method for using the device that can automatically select the thickness of the bag film, so as to solve the problem in the prior art that a single thickness of bag film is used for material packaging, it is difficult to dynamically match the bag film thickness according to the weight of the material for packaging, and it is easy to cause the risk of material spillage or waste.

[0006] The present application provides a weighing device capable of automatically selecting the thickness of a bag film, comprising: Weighing module, used to weigh the delivered materials; A determination module, connected to the weighing module, is used to determine the actual weight of the weighed material according to a preset determination weight value, and select or calculate the required bag film thickness, required heat sealing temperature and required heat sealing time according to the determination result; A switching module, connected to the determination module, for selecting a packaging bag film of corresponding thickness for switching according to the required bag film thickness obtained; a packaging module, connected to the determination module and the switching module respectively, for packaging the weighed material according to the required heat sealing temperature and required heat sealing time; The transport module is composed of a plurality of selection grippers and corresponding conveyor belts to transport the weighed materials to the packaging module for packaging according to the judgment results.

[0007] Preferably, the weighing module includes a load-bearing device and a weighing device, the load-bearing device is any plate or box structure that can bear heavy objects, and the weighing device is arranged inside or at the bottom of the load-bearing device to weigh the material falling into the load-bearing device.

[0008] Preferably, the determination module includes: A determination submodule, for determining the actual weight of the material obtained after passing through the weighing module according to a preset determination weight value, and dividing the required bag film thickness interval according to the determination result; The calculation submodule is provided with a plurality of preset calculation coefficients, which are used to select the corresponding preset coefficients, preset bag film thickness and preset heat sealing temperature according to the thickness interval divided by the judgment submodule, and thereby calculate the required bag film thickness and required heat sealing time actually required for the material.

[0009] Preferably, the preset judgment weight value includes a first preset judgment weight and a second preset judgment weight, and the first preset judgment weight is smaller than the second preset judgment weight; The determination submodule determines the actual weight of the obtained material according to the preset determination weight value in the following process: If the actual weight is less than the first preset weight, the required bag film interval is determined to be a thin bag film, and the first preset bag film thickness is directly selected as the required bag film thickness; If the actual weight is greater than or equal to the first preset judgment weight and less than or equal to the second preset judgment weight, it is determined that the required bag film interval is ordinary bag film; If the actual weight is greater than the second preset judgment weight, it is determined that the required bag film interval is a thick bag film.

[0010] Preferably, the calculation submodule includes a first calculation submodule for calculating the required bag film thickness and a second calculation submodule for calculating the required heat sealing time; The first calculation submodule is provided with the first preset bag film thickness, the second preset bag film thickness, the first preset coefficient and the second preset coefficient, and the first preset bag film thickness is smaller than the second preset bag film thickness; When the required bag film interval is determined to be a common bag film, the first calculation submodule calculates according to the first preset calculation coefficient and the first preset bag film thickness to obtain the common bag film thickness as the required bag film thickness; When the required bag film interval is determined to be a thick bag film, the first calculation submodule calculates according to the second preset calculation coefficient and the second preset bag film thickness to obtain the larger bag film thickness as the required bag film thickness; Where, Hs'=H1+(Ms-M1)K1, Hs''=H2+(Ms-M2)K2, Hs' is the normal bag film thickness, Hs'' is the maximum bag film thickness, H1 is the first preset bag film thickness, H2 is the second preset bag film thickness, Ms is the actual weight of the material, M1 is the first preset judgment weight, M2 is the second preset judgment weight, K1 is the first preset coefficient, and K2 is the second preset coefficient.

[0011] Preferably, the second calculation submodule is provided with a first preset heat sealing temperature, a second preset heat sealing temperature, a first preset heat sealing time, a second preset heat sealing time, a third preset coefficient, and a fourth preset coefficient, and the first preset heat sealing temperature is lower than the second preset heat sealing temperature, and the first preset heat sealing time is lower than the second preset heat sealing time; When the required bag film interval is determined to be a thin bag film, the first preset heat sealing temperature and the first preset heat sealing time are directly selected as the required heat sealing temperature and the required heat sealing time; When the required bag film interval is determined to be a common bag film, the first preset heat sealing temperature is selected as the required heat sealing temperature, and the first preset heat sealing time and the third preset coefficient are calculated to obtain a corrected heat sealing time as the required heat sealing time; When the required bag film interval is determined to be a thick bag film, the second preset heat sealing temperature is selected as the required heat sealing temperature, and the high-temperature heat sealing time is calculated based on the second preset heat sealing time and the fourth preset coefficient to obtain the required heat sealing time; Wherein, T'=T1+(Hs-H1)K3, T''=T2+(Hs-H2)K4, T' is the corrected heat sealing time, T'' is the high temperature heat sealing time, T1 is the first preset heat sealing time, T2 is the second preset heat sealing time, and Hs is the required bag film thickness.

[0012] Preferably, the switching module includes: A multi-station bag film holder for loading bag films of different thicknesses, wherein the multi-station bag film holder has at least three switching stations; A pneumatic film changing device, connected to the multi-station bag film support, for driving the multi-station bag film support to switch according to the required bag film thickness; A tension calibration device is connected to the multi-station bag film support and is used to detect and calibrate the real-time tension of the bag film after switching.

[0013] Preferably, the packaging module includes a heating device for heating the bag film and a pressing device for pressing the heated bag film; The packaging module further includes: A pre-coating mechanism, which is arranged in front of the heating device and connected to the determination submodule; The pre-coating mechanism can apply hot melt adhesive to the packaging bag film determined to be a thin bag film to form a hot melt adhesive pre-coating layer.

[0014] Preferably, it also includes a tensioning mechanism and a cutting mechanism; The tensioning mechanism and the cutting mechanism are arranged between the switching module and the packaging module, and are used to tension the switched packaging bag film and cut it according to a preset bag film length so as to subsequently package the weighed material.

[0015] The present invention also provides a method for using a weighing device capable of automatically selecting bag film thickness based on any of the above items, comprising: Step S1: weigh the transported materials using a weighing module and record the actual weight of the weighed materials; Step S2: The recorded actual weight is determined by a determination submodule in the determination module to divide the required bag film thickness into intervals, and the calculation submodule in the determination module selects corresponding parameters according to the divided thickness intervals to perform calculations to determine the required bag film thickness, required heat sealing temperature, and required heat sealing time for subsequent packaging. Step S3, switching the packaging bag film of corresponding thickness to the corresponding work station according to the required bag film thickness obtained by the switching module; Step S4: The packaging module heats and seals the packaging bag film filled with the corresponding materials according to the required heat-sealing temperature and required heat-sealing time, thereby completing the packaging.

[0016] The beneficial effects of this application are as follows: The weighing device of the present application can automatically select the thickness of the bag film. The weighing module is used to weigh and measure the materials to be packaged, and the judgment module is used to make a judgment based on the weighing result. The packaging bag film of corresponding thickness is selected according to the different weights. The switching module is used to switch the packaging bag film of corresponding thickness to the corresponding work station in time, and then the packaging module is used to package it according to the corresponding heat sealing temperature and heat sealing time. In this way, the device can use the bag film thickness as needed, which improves the flexibility of production. By supporting seamless switching of bag films of multiple thicknesses, it can adapt to the weighing needs of small materials of various weights, saving the cost of packaging materials while reducing the risk of spillage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic diagram of the overall structure of a weighing device capable of automatically selecting bag film thickness provided in an embodiment of the present application; Figure 2 A structural block diagram of a weighing device capable of automatically selecting bag film thickness provided in an embodiment of the present application; Figure 3 This is a logic diagram of the determination of the actual weight obtained by the determination submodule in the embodiment of the present application; Figure 4 A flow chart of a method for using a weighing device that can automatically select bag film thickness provided in an embodiment of the present application.

[0019] Reference numerals: 100, weighing module; 200, determination module; 300, switching module; 400, packaging module; 510, selection gripper; 520, conveyor belt; 600, tensioning mechanism; 700, cutting mechanism. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of this application in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] The following combination Figures 1-4 , describing the weighing device and usage method for automatically selecting the bag film thickness provided in the embodiments of the present application.

[0022] Reference Figure 1 As shown, the weighing device for automatically selecting bag film thickness provided in an embodiment of the present application includes a weighing module 100, a determination module 200, a switching module 300, a packaging module 400, and a transport module. The weighing module 100 is located at the front of the device and is connected to the external material transport structure. It is used to weigh the transported materials and record the actual weight of the weighed materials. The determination module 200 is connected to the weighing module 100 and can be arranged in parallel with the weighing module 100 or arranged after the weighing module 100. It is used to determine the actual weight of the weighed materials based on the predetermined determination weight value. It can also calculate or select the packaging parameters required for subsequent bag film thickness, required heat sealing temperature, and required heat sealing time based on the determination result and the corresponding parameters preset therein. The switching module 300 is arranged after the determination module 200 and is used to dynamically respond to the desired bag film thickness in a timely manner based on the determination result of the determination module 200, switching the packaging bag film to the corresponding thickness. The packaging module 400 is located at the very end of the device and is used to package and store the weighed materials according to the required heat-sealing temperature and time. The transportation module, consisting of multiple corresponding pick-up grippers 510 and conveyor belts 520, transports the weighed materials according to the judgment results. At least one pick-up gripper 510 is provided between the weighing module 100 and the judgment module 200, between the judgment module 200 and the switching module 300, and between the switching module 300 and the packaging module 400 to facilitate transfer and transportation between the modules.

[0023] The materials to be packaged are weighed and measured by the set weighing module 100, and the set judgment module 200 makes a judgment based on the weighing result, and selects the packaging bag film of corresponding thickness according to different weights, and the packaging bag film of corresponding thickness is promptly switched to the corresponding work station through the switching module 300, and then packaged according to the corresponding heat sealing temperature and heat sealing time through the packaging module 400, so that the device can use the bag film thickness as needed, thereby improving the flexibility of production. By supporting seamless switching of bag films of multiple thicknesses, it can adapt to the weighing needs of small materials of various weights, saving packaging material costs while reducing the risk of spillage.

[0024] In some specific embodiments, the weighing module 100 includes a load-bearing device and a weighing device, the load-bearing device is any plate or box structure that can bear heavy objects, and the weighing device is arranged inside or at the bottom of the load-bearing device to weigh the materials falling into the load-bearing device. The weighing device can be a sensor system composed of components such as a pressure sensor and an analog-to-digital converter that can display the weight of an object in real time, or it can be directly a mature device such as an electronic scale, a weighing sensor, etc. that is more common on the market, and no excessive restrictions are made here.

[0025] Please continue to refer to Figure 2 ,like Figure 2 As shown, it is a structural block diagram of a weighing device capable of automatically selecting the thickness of a bag film provided in an embodiment of the present application. In this embodiment, the determination module 200 includes: A determination submodule and a calculation submodule, wherein the determination submodule is used to determine the actual weight of the material obtained after passing through the weighing module 100 according to a preset determination weight value, and divide the required bag film thickness interval according to the determination result; The calculation submodule is provided with a plurality of preset calculation coefficients, which are used to select corresponding preset coefficients, preset bag film thicknesses and preset heat sealing temperatures according to the thickness intervals divided by the determination submodule, and thereby calculate the required bag film thickness and required heat sealing time actually required for the material. The preset calculation coefficients include a plurality of sets of preset coefficients, preset bag film thicknesses, preset heat sealing temperatures and preset heat sealing times.

[0026] Please continue to refer to Figure 3 ,like Figure 3 As shown, it is a logic diagram of the determination of the actual weight obtained by the determination submodule in an embodiment of the present application. In this embodiment, the preset determination weight value includes a first preset determination weight and a second preset determination weight, and the first preset determination weight is less than the second preset determination weight; The determination submodule determines the actual weight of the obtained material according to the preset determination weight value in the following process: If the actual weight is less than the first preset weight, the required bag film interval is determined to be a thin bag film, and the first preset bag film thickness is directly selected as the required bag film thickness; If the actual weight is greater than or equal to the first preset judgment weight and less than or equal to the second preset judgment weight, it is determined that the required bag film interval is ordinary bag film; If the actual weight is greater than the second preset judgment weight, it is determined that the required bag film interval is a thick bag film.

[0027] In some specific embodiments, the calculation submodule includes a first calculation submodule for calculating the required bag film thickness and a second calculation submodule for calculating the required heat sealing time; The first calculation submodule is provided with the first preset bag film thickness, the second preset bag film thickness, the first preset coefficient and the second preset coefficient, and the first preset bag film thickness is smaller than the second preset bag film thickness; When the required bag film interval is determined to be a common bag film, the first calculation submodule calculates according to the first preset calculation coefficient and the first preset bag film thickness to obtain the common bag film thickness as the required bag film thickness; When the required bag film interval is determined to be a thick bag film, the first calculation submodule calculates according to the second preset calculation coefficient and the second preset bag film thickness to obtain the larger bag film thickness as the required bag film thickness; Where, Hs'=H1+(Ms-M1)K1, Hs''=H2+(Ms-M2)K2, Hs' is the normal bag film thickness, Hs'' is the maximum bag film thickness, H1 is the first preset bag film thickness, H2 is the second preset bag film thickness, Ms is the actual weight of the material, M1 is the first preset judgment weight, M2 is the second preset judgment weight, K1 is the first preset coefficient, and K2 is the second preset coefficient.

[0028] In this embodiment, the selection or calculation of the first preset bag film thickness H1, the second preset bag film thickness H2 and the first preset coefficient K1, the second preset coefficient K2 should be set according to the casting material and the actual number of layers of the selected bag film.

[0029] For example, when the selected bag film material is a single-layer PE film, the following table provides a correspondence between the bag film thickness and load-bearing capacity when the bag film material is a single-layer PE film: Table 1. Correspondence between bag film thickness and load-bearing capacity.

[0030]

[0031] According to the corresponding data in Table 1, when the bag film thickness is between 0.04mm and 0.08mm, the maximum load-bearing capacity in the load-bearing range is directly proportional to the bag film thickness, that is, every increase of 0.01mm in thickness can increase the maximum load-bearing capacity by 5kg. Moreover, since the load-bearing capacity begins to decrease significantly at 0.03mm, in order to prevent the selected bag film from being too thin and causing the material to spill out, and to prevent the bag film from being melted through during heat sealing due to being too thin, the first preset bag film thickness can be selected as 0.03mm, that is, H1=0.03mm, so that materials below 2kg are all packaged with a bag film of 0.03mm thickness. At this time, the first preset coefficient K1 can be calculated as 0.01mm / 5kg=0.002mm / kg; When the bag film thickness is greater than 0.08mm, the ratio between its maximum load-bearing weight and the bag film thickness still changes in direct proportion. However, as can be seen from the table below, there is an obvious jump in the load-bearing range at 0.08mm. Therefore, it is still necessary to reselect the preset bag film thickness involved in the calculation to ensure its calculation accuracy. Therefore, 0.08mm can be selected as the second preset bag film thickness, that is, H2=0.08mm. Since the relationship between the maximum load-bearing weight and the bag film thickness is still a proportional relationship, the second preset coefficient can be set to K2= K1=0.02mm / kg. When the selected bag film material is other materials, K1 and K2 should still be recalculated according to their actual change relationship.

[0032] The first preset judgment weight and the second preset judgment weight should be selected according to the selected first preset bag film thickness and the second preset bag film thickness. For example, in this embodiment, if H1=0.03mm and H2=0.08mm, then M1=2kg and M2=20kg can be selected accordingly.

[0033] In some specific embodiments, the second calculation submodule is provided with a first preset heat sealing temperature, a second preset heat sealing temperature, a first preset heat sealing time, a second preset heat sealing time, a third preset coefficient, and a fourth preset coefficient, and the first preset heat sealing temperature is less than the second preset heat sealing temperature, and the first preset heat sealing time is less than the second preset heat sealing time; When the required bag film interval is determined to be a thin bag film, the first preset heat sealing temperature and the first preset heat sealing time are directly selected as the required heat sealing temperature and the required heat sealing time; When the required bag film interval is determined to be a common bag film, the first preset heat sealing temperature is selected as the required heat sealing temperature, and the first preset heat sealing time and the third preset coefficient are calculated to obtain a corrected heat sealing time as the required heat sealing time; When the required bag film interval is determined to be a thick bag film, the second preset heat sealing temperature is selected as the required heat sealing temperature, and the high-temperature heat sealing time is calculated based on the second preset heat sealing time and the fourth preset coefficient to obtain the required heat sealing time; Wherein, T'=T1+(Hs-H1)K3, T''=T2+(Hs-H2)K4, T' is the corrected heat sealing time, T'' is the high temperature heat sealing time, T1 is the first preset heat sealing time, T2 is the second preset heat sealing time, and Hs is the required bag film thickness.

[0034] In this embodiment, the first preset heat-sealing temperature and the second preset heat-sealing temperature should also be selected and set according to the casting material of the bag film selected for packaging and the actual number of layers thereof. The first preset heat-sealing temperature is used to heat the packaging bag film with the bag film interval being a thin bag film and a regular bag film, while the second preset heat-sealing temperature is used to heat the packaging bag film with the bag film interval being a thick bag film. For example, when the selected bag film material is still a single-layer PE film, after consulting the basic parameters of the heat sealing process for PE materials, it is known that the melting point of LDPE (low-density polyethylene) is between 105-115°C, and the melting point of HDPE (high-density polyethylene) is between 126-136°C. In conventional heat sealing processes, the corresponding standard heat sealing temperatures are between 120-160°C and 135-180°C, respectively. Therefore, after comprehensive consideration, to avoid the preset temperature being too high and melting through the thin bag film, 135°C can be selected as the first preset heat sealing temperature. To avoid the heat sealing time required for thick bag films being too long and affecting overall production efficiency, the heat sealing temperature for thick bag films must be appropriately increased to reduce the required heat sealing time. Therefore, the second preset heat sealing temperature is selected within the range of 135-160°C. In this embodiment, 145°C is selected as the second preset heat sealing temperature. The selected first preset heat sealing time, second preset heat sealing time, third preset coefficient and fourth preset coefficient should be selected and calculated accordingly based on the selected first preset heat sealing temperature and second preset heat sealing temperature. For example, the following table provides a corresponding table of heat sealing time and bag film thickness for ordinary bag films under a certain heat sealing temperature and a corresponding table of heat sealing time and bag film thickness for thick bag films under a certain heat sealing temperature: Table 2. Correspondence between heat sealing time and bag film thickness of ordinary bag films.

[0035]

[0036] Table 3. Correspondence between heat sealing time and bag film thickness for thick bag films.

[0037]

[0038] According to the data in Table 2 and Table 3, when the packaging bag film material used is a single-layer PE film and 135°C is used as the first preset heat sealing temperature, when the bag film thickness is within the range of ordinary bag films, the required heat sealing time is directly proportional to the change in bag film thickness, that is, the heat sealing time needs to be increased by 0.3 seconds for every 0.02mm increase in thickness. When the bag film thickness is within the range of thick bag films and is heat sealed at the second preset heat sealing temperature of 145°C, although the relationship between the required heat sealing time and the change in bag film thickness is still proportional, the heat sealing time needs to be increased by 0.3 seconds for every 0.02mm increase in thickness. The heat sealing time is proportional to the thickness of the film, but the heat sealing time increased each time is still significantly extended, that is, the heat sealing time needs to be increased by 0.5 seconds for each 0.01mm increase in thickness. Therefore, the heat sealing time corresponding to 0.03mm and 0.08mm can be used as the first preset heat sealing time and the second preset heat sealing time respectively, that is, T1=0.6s, T2=1s. At this time, the third preset coefficient K3=0.3s / 0.02mm=15s / mm, K4=0.5s / 0.01mm=50s / mm can be calculated. Furthermore, since the load-bearing capacity begins to decrease significantly at 0.03mm, in order to prevent the selected bag film from being too thin and causing the material to spill out, and to prevent the bag film from being melted through during heat sealing due to being too thin, the first preset bag film thickness can be selected as 0.03mm, that is, H1=0.03mm, so that materials below 2kg are all packaged with a bag film of 0.03mm thickness. In this case, K1 can be calculated as 0.01mm / 5kg=0.002mm / kg; When the bag film thickness is greater than 0.08mm, the ratio between its maximum load-bearing weight and the bag film thickness still changes in direct proportion. However, as can be seen from the table below, there is an obvious jump in the load-bearing range at 0.08mm. Therefore, it is still necessary to reselect the preset bag film thickness involved in the calculation to ensure its calculation accuracy. Therefore, 0.08mm can be selected as the second preset bag film thickness, that is, H2=0.08mm. Since the relationship between the maximum load-bearing weight and the bag film thickness is still a proportional relationship, the second preset coefficient can be set to K2= K1=0.02mm / kg. When the selected bag film material is other materials, K1 and K2 should still be recalculated according to their actual change relationship.

[0039] In some specific embodiments, the switching module 300 includes: A multi-station bag film holder, a pneumatic film changing device and a tension calibration device, wherein the multi-station bag film holder is used to load bag films of different thicknesses, and the multi-station bag film holder has at least three switching stations. The pneumatic film changing device is connected to the multi-station bag film holder, which can drive the multi-station bag film holder to rotate through the provided pneumatic drive element, and is used to drive the multi-station bag film holder to switch according to the required bag film thickness obtained. Similarly, as another implementation method of this embodiment, it can also use a servo drive device to replace the pneumatic drive device to drive the bag film holder to perform film change switching. The pneumatic film changing device is only one of the ways to realize the film change movement of the switching module 300, and it is not necessary. No excessive restrictions are made here.

[0040] The tension calibration device is connected to the multi-station bag film support and is used to detect and calibrate the real-time tension of the bag film after switching, so as to keep the bag film used for packaging in the required tension state at all times.

[0041] In some specific embodiments, the packaging module 400 includes a heating device for heating the bag film and a pressing device for pressing the heated bag film; In this embodiment, the selection of the heating device can be selected according to the actual situation of the required production scenario. It can be any one of many devices that can provide heating for the bag film, such as electric heating equipment, infrared heating equipment, high-frequency induction heating equipment, ultrasonic heating equipment, etc. The same is true for the selection of the pressing device. It can be any pressure device that can meet the pressing pressure of the bag film, such as pneumatic pressing equipment, servo pressing equipment, etc., or directly use more mature heat sealing equipment such as commonly used electric heating heat sealing machines, high-frequency induction sealing machines, etc. The packaging module 400 further includes: A pre-coating mechanism, which is arranged in front of the heating device and connected to the determination submodule; The pre-coating mechanism can apply hot melt adhesive to the packaging bag film determined to be a thin bag film to form a hot melt adhesive pre-coating layer to enhance the sealing strength of the sealing portion of the thin bag film.

[0042] Please refer to the figure again, as shown in Figure 1 As shown, the weighing device capable of automatically selecting the thickness of the bag film further comprises a tensioning mechanism 600 and a cutting mechanism 700; The tensioning mechanism 600 and the cutting mechanism 700 are arranged between the switching module 300 and the packaging module 400, and are used to tension the switched packaging bag film and cut it according to a preset bag film length so as to subsequently package the weighed material.

[0043] Please continue reading Figure 4 ,like Figure 4As shown, it is a flow chart of a method for using a weighing device capable of automatically selecting the thickness of a bag film provided in an embodiment of the present application. Specifically, this embodiment further provides a method for using a weighing device capable of automatically selecting the thickness of a bag film based on any of the above items, comprising: Step S1: weighing the transported materials through the weighing module 100, and recording the actual weight of the weighed materials; Step S2: The recorded actual weight is determined by the determination submodule in the determination module 200 to divide the required bag film thickness into intervals, and the calculation submodule in the determination module 200 selects corresponding parameters according to the divided thickness intervals to perform calculations to determine the required bag film thickness, required heat sealing temperature, and required heat sealing time for subsequent packaging. Step S3, switching the packaging bag film of corresponding thickness to the corresponding work station according to the required bag film thickness obtained by the switching module 300; In step S4, the packaging module 400 heats and seals the packaging bag film filled with the corresponding materials according to the required heat-sealing temperature and required heat-sealing time, thereby completing the packaging.

[0044] Specifically, the weighing device that can automatically select the thickness of the bag film provided by the embodiment of the present invention can achieve the same technical effect by executing the above-mentioned usage method, which will not be repeated here.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0047] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0048] In this application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0049] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A weighing device capable of automatically selecting the thickness of a bag film, characterized in that: include: Weighing module, used to weigh the delivered materials; A determination module, connected to the weighing module, is used to determine the actual weight of the weighed material according to a preset determination weight value, and select or calculate the required bag film thickness, required heat sealing temperature and required heat sealing time according to the determination result; A switching module, connected to the determination module, for selecting a packaging bag film of corresponding thickness for switching according to the required bag film thickness obtained; a packaging module, connected to the determination module and the switching module respectively, for packaging the weighed material according to the required heat sealing temperature and required heat sealing time; The transport module is composed of a plurality of selection grippers and corresponding conveyor belts to transport the weighed materials to the packaging module for packaging according to the judgment results.

2. The weighing device capable of automatically selecting the thickness of the bag film according to claim 1, characterized in that: The weighing module includes a load-bearing device and a weighing device. The load-bearing device is any plate or box structure that can bear heavy objects. The weighing device is arranged inside or at the bottom of the load-bearing device to weigh the material falling into the load-bearing device.

3. The weighing device capable of automatically selecting the thickness of the bag film according to claim 1, characterized in that: The determination module includes: A determination submodule, for determining the actual weight of the material obtained after passing through the weighing module according to a preset determination weight value, and dividing the required bag film thickness interval according to the determination result; The calculation submodule is provided with a plurality of preset calculation coefficients, which are used to select the corresponding preset coefficients, preset bag film thickness and preset heat sealing temperature according to the thickness interval divided by the judgment submodule, and thereby calculate the required bag film thickness and required heat sealing time actually required for the material.

4. The weighing device capable of automatically selecting bag film thickness according to claim 3, characterized in that: The preset judgment weight value includes a first preset judgment weight and a second preset judgment weight, and the first preset judgment weight is smaller than the second preset judgment weight; The determination submodule determines the actual weight of the obtained material according to the preset determination weight value in the following process: If the actual weight is less than the first preset weight, the required bag film interval is determined to be a thin bag film, and the first preset bag film thickness is directly selected as the required bag film thickness; If the actual weight is greater than or equal to the first preset judgment weight and less than or equal to the second preset judgment weight, it is determined that the required bag film interval is ordinary bag film; If the actual weight is greater than the second preset judgment weight, it is determined that the required bag film interval is a thick bag film.

5. The weighing device capable of automatically selecting bag film thickness according to claim 4, characterized in that: The calculation submodule includes a first calculation submodule for calculating the required bag film thickness and a second calculation submodule for calculating the required heat sealing time; The first calculation submodule is provided with the first preset bag film thickness, the second preset bag film thickness, the first preset coefficient and the second preset coefficient, and the first preset bag film thickness is smaller than the second preset bag film thickness; When the required bag film interval is determined to be a common bag film, the first calculation submodule calculates according to the first preset calculation coefficient and the first preset bag film thickness to obtain the common bag film thickness as the required bag film thickness; When the required bag film interval is determined to be a thick bag film, the first calculation submodule calculates according to the second preset calculation coefficient and the second preset bag film thickness to obtain the larger bag film thickness as the required bag film thickness; Where, Hs'=H1+(Ms-M1)K1, Hs''=H2+(Ms-M2)K2, Hs' is the normal bag film thickness, Hs'' is the maximum bag film thickness, H1 is the first preset bag film thickness, H2 is the second preset bag film thickness, Ms is the actual weight of the material, M1 is the first preset judgment weight, M2 is the second preset judgment weight, K1 is the first preset coefficient, and K2 is the second preset coefficient.

6. The weighing device capable of automatically selecting the thickness of the bag film according to claim 5, characterized in that: The second calculation submodule is provided with a first preset heat sealing temperature, a second preset heat sealing temperature, a first preset heat sealing time, a second preset heat sealing time, a third preset coefficient, and a fourth preset coefficient, and the first preset heat sealing temperature is lower than the second preset heat sealing temperature, and the first preset heat sealing time is lower than the second preset heat sealing time; When the required bag film interval is determined to be a thin bag film, the first preset heat sealing temperature and the first preset heat sealing time are directly selected as the required heat sealing temperature and the required heat sealing time; When the required bag film interval is determined to be a common bag film, the first preset heat sealing temperature is selected as the required heat sealing temperature, and the first preset heat sealing time and the third preset coefficient are calculated to obtain a corrected heat sealing time as the required heat sealing time; When the required bag film interval is determined to be a thick bag film, the second preset heat sealing temperature is selected as the required heat sealing temperature, and the high-temperature heat sealing time is calculated based on the second preset heat sealing time and the fourth preset coefficient to obtain the required heat sealing time; Wherein, T'=T1+(Hs-H1)K3, T''=T2+(Hs-H2)K4, T' is the corrected heat sealing time, T'' is the high temperature heat sealing time, T1 is the first preset heat sealing time, T2 is the second preset heat sealing time, and Hs is the required bag film thickness.

7. The weighing device capable of automatically selecting bag film thickness according to claim 1, characterized in that: The switching module includes: A multi-station bag film holder for loading bag films of different thicknesses, wherein the multi-station bag film holder has at least three switching stations; A pneumatic film changing device, connected to the multi-station bag film support, for driving the multi-station bag film support to switch according to the required bag film thickness; A tension calibration device is connected to the multi-station bag film support and is used to detect and calibrate the real-time tension of the bag film after switching.

8. The weighing device capable of automatically selecting bag film thickness according to claim 6, characterized in that: The packaging module includes a heating device for heating the bag film and a pressing device for pressing the heated bag film; The packaging module further includes: A pre-coating mechanism, which is arranged in front of the heating device and connected to the determination submodule; The pre-coating mechanism can apply hot melt adhesive to the packaging bag film determined to be a thin bag film to form a hot melt adhesive pre-coating layer.

9. The weighing device capable of automatically selecting bag film thickness according to claim 1, characterized in that: Also includes a tensioning mechanism and a cutting mechanism; The tensioning mechanism and the cutting mechanism are arranged between the switching module and the packaging module, and are used to tension the switched packaging bag film and cut it according to a preset bag film length so as to subsequently package the weighed material.

10. A method for using the weighing device capable of automatically selecting bag film thickness according to any one of claims 1 to 9, characterized in that: include: Step S1: weigh the transported materials using a weighing module and record the actual weight of the weighed materials; Step S2: The recorded actual weight is determined by a determination submodule in the determination module to divide the required bag film thickness into intervals, and the calculation submodule in the determination module selects corresponding parameters according to the divided thickness intervals to perform calculations to determine the required bag film thickness, required heat sealing temperature, and required heat sealing time for subsequent packaging. Step S3, switching the packaging bag film of corresponding thickness to the corresponding work station according to the required bag film thickness obtained by the switching module; Step S4: The packaging module heats and seals the packaging bag film filled with the corresponding materials according to the required heat-sealing temperature and required heat-sealing time, thereby completing the packaging.

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