A weighing device capable of automatically selecting a bag film thickness and a method of use

Abstract

The application relates to the technical field of material packaging, in particular to a weighing device capable of automatically selecting bag film thickness and a use method, wherein the weighing device capable of automatically selecting bag film thickness comprises a weighing module, a judgment module, a switching module, a packaging module and a transportation module. The weighing module is arranged to weigh and measure the material to be packaged, the judgment module is arranged to judge according to the weighing result, the material is divided into different thicknesses of packaging bag films according to different weights, the switching module is arranged to timely switch the corresponding thickness of the packaging bag film to the corresponding station, and then the packaging module is arranged to package the material according to the corresponding heat sealing temperature and heat sealing time, so that the device can use the bag film thickness as required, the production flexibility is improved, the seamless switching of the bag films with different thicknesses is supported, the weighing demand of the materials with various weights can be met, the packaging material cost is saved, and the material scattering risk is reduced.

Description

Technical Field

[0001] This application relates to the field of material packaging technology, and in particular to a weighing device and method of using a bag film thickness that can automatically select the thickness. Background Technology

[0002] In the material production process, the produced materials are packaged into bags. The traditional process for this production is to manually pick up the bags and use a hopper. However, manual packaging is time-consuming, labor-intensive, inaccurate in weighing, and has low packaging efficiency. 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 existing technical solutions, most production equipment uses a single roll of bag film of uniform thickness to keep it flat with tension rollers and completes cutting and packaging according to a preset length.

[0003] However, most of these solutions have the following drawbacks:

[0004] If ordinary thickness or thinner bags are used uniformly, safety risks may arise. For example, when using thinner bags (such as 0.05mm thick) to package heavy materials (such as 20kg), they are prone to breakage. Especially in transportation or stacking scenarios, the sharp edges of the materials may puncture the bag film, causing spillage and safety hazards.

[0005] While using high-thickness bags can mitigate risks, it also significantly increases material costs. For example, if lightweight products (e.g., 1kg) are forced to use high-thickness bags (e.g., those that can support 10kg), it will lead to increased material costs.

[0006] Furthermore, most of these solutions still rely on adjustment when changing the film, requiring frequent machine shutdowns for manual adjustment to change the film thickness, which severely restricts production continuity.

[0007] The aforementioned problems have long plagued the industry, and there is an urgent need for an intelligent solution that can dynamically match the thickness of the bag film with the weight of the material and improve production flexibility. Summary of the Invention

[0008] This application provides a weighing device and method for automatically selecting the thickness of the bag film, in order to solve the problem that in the prior art, when 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, which easily leads to the risk of spillage or material waste.

[0009] This application provides a weighing device that can automatically select the thickness of the bag film, comprising:

[0010] The weighing module is used to weigh the delivered materials;

[0011] a determination module connected with the weighing module, configured 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, the required heat sealing temperature and the required heat sealing time according to the determination result;

[0012] a switching module connected with the determination module, configured to switch the packaging bag film of the corresponding thickness according to the required bag film thickness obtained;

[0013] a packaging module connected with the determination module and the switching module respectively, configured to package the weighed material according to the required heat sealing temperature and the required heat sealing time obtained;

[0014] a conveying module composed of a plurality of selected grippers and corresponding conveying belts, configured to convey the weighed material to the packaging module for packaging according to the determination result.

[0015] Preferably, the weighing module comprises a load bearing device and a weighing device, the load bearing device being any plate or box structure capable of bearing a load, and the weighing device being arranged inside or at the bottom of the load bearing device to weigh the material falling into the load bearing device.

[0016] Preferably, the determination module comprises:

[0017] a determination submodule configured to determine the actual weight of the material obtained after passing through the weighing module according to a preset determination weight value, and divide the thickness interval of the required bag film according to the determination result;

[0018] a calculation submodule provided with a plurality of preset calculation coefficients, configured to select the corresponding preset coefficient, the preset bag film thickness and the preset heat sealing temperature according to the thickness interval divided by the determination submodule, and calculate the required bag film thickness and the required heat sealing time required by the weighed material.

[0019] Preferably, the preset determination weight value comprises a first preset determination weight and a second preset determination weight, and the first preset determination weight is smaller than the second preset determination weight;

[0020] The determination process of the determination submodule on the actual weight of the obtained material is as follows:

[0021] If the actual weight is less than the first preset determination weight, it is determined that the required bag film interval is a thin bag film, and the first preset bag film thickness is directly selected as the required bag film thickness;

[0022] If the actual weight is greater than or equal to the first preset determination weight and less than or equal to the second preset determination weight, it is determined that the required bag film interval is an ordinary bag film;

[0023] If the actual weight is greater than the second preset judgment weight, it is determined that the required bag film interval is thick bag film.

[0024] Preferably, the calculation sub-module comprises a first calculation sub-module for calculating the required bag film thickness and a second calculation sub-module for calculating the required heat sealing time.

[0025] The first calculation sub-module 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 less than the second preset bag film thickness.

[0026] When the required bag film interval after determination is ordinary bag film, the first calculation sub-module will calculate according to the first preset calculation coefficient and the first preset bag film thickness to obtain the ordinary bag film thickness as the required bag film thickness thereof.

[0027] When the required bag film interval after determination is thick bag film, the first calculation sub-module will calculate 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 thereof.

[0028] Hs' = H1 + (Ms - M1)K1, Hs'' = H2 + (Ms - M2)K2, Hs' is the ordinary bag film thickness, Hs'' is the larger 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.

[0029] Preferably, the second calculation sub-module is provided with the first preset heat sealing temperature, the second preset heat sealing temperature, the first preset heat sealing time, the second preset heat sealing time, the third preset coefficient and the 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.

[0030] When the required bag film interval after determination is thin bag film, the first preset heat sealing temperature and the first preset heat sealing time will be directly selected as the required heat sealing temperature and the required heat sealing time thereof.

[0031] When the required bag film interval after determination is ordinary bag film, the first preset heat sealing temperature will be selected as the required heat sealing temperature thereof, and a corrected heat sealing time will be obtained by calculating according to the first preset heat sealing time and the third preset coefficient as the required heat sealing time thereof.

[0032] When the required bag film range is determined to be a thick bag film, the second preset heat sealing temperature will be selected as the required heat sealing temperature, and the high temperature heat sealing time will be calculated based on the second preset heat sealing time and the fourth preset coefficient as the required heat sealing time.

[0033] Where 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] Preferably, the switching module includes:

[0035] A multi-station bag film support is used to load bag films of different thicknesses, and the multi-station bag film support has at least three switching stations;

[0036] A pneumatic film changing device is connected to the multi-station bag film support and is used to drive the multi-station bag film support to switch according to the required bag film thickness.

[0037] A tension calibration device, which is connected to the multi-station bag film support, is used to detect and calibrate the real-time tension of the bag film after switching.

[0038] Preferably, the packaging module includes a heating device for heating the bag film and a pressing device for pressing the heated bag film.

[0039] The packaging module further includes:

[0040] A pre-coating mechanism is disposed in front of the heating device and connected to the determination submodule;

[0041] The pre-coating mechanism can apply hot melt adhesive to the packaging film that is determined to be a thin film to form a hot melt adhesive pre-coating layer.

[0042] Preferably, it also includes a tensioning mechanism and a cutting mechanism;

[0043] The tensioning mechanism and the cutting mechanism are located between the switching module and the packaging module, and are used to tension the packaged film after switching and cut it according to the preset film length so that the weighed material can be packaged subsequently.

[0044] The present invention also provides a method of using a weighing device based on any one of the above-mentioned methods, which can automatically select the thickness of the bag film, comprising:

[0045] Step S1: Weigh the materials in the transport vehicle using the weighing module and record the actual weight of the weighed materials.

[0046] Step S2, the actual weight recorded is determined by a determination submodule in the determination module to divide the thickness interval of the required bag film, and the corresponding parameters are selected for calculation by a calculation submodule in the determination module according to the divided thickness interval, so as to determine the required bag film thickness, the required heat sealing temperature and the required heat sealing time for subsequent packaging;

[0047] Step S3, the packaging bag film of the corresponding thickness is switched to the corresponding station by the switching module according to the required bag film thickness obtained;

[0048] Step S4, the packaging bag film filled with the corresponding material is heated and packaged by the packaging module according to the required heat sealing temperature and the required heat sealing time, and the packaging is completed.

[0049] The beneficial effects of the present application are as follows:

[0050] The weighing device capable of automatically selecting bag film thickness of the present application weighs and measures the material to be packaged by the weighing module, determines the weighing result by the determination module, selects the packaging bag film of the corresponding thickness according to the different weights, switches the packaging bag film of the corresponding thickness to the corresponding station in time by the switching module, and then packages it by the packaging module according to the corresponding heat sealing temperature and heat sealing time, so that the device can use the bag film thickness as needed, improves the flexibility of production, supports seamless switching of bag films of different thicknesses, can adapt to the weighing needs of materials of different weights, saves packaging material costs, and reduces the risk of material scattering. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings without creative labor on the basis of these drawings.

[0052] Figure 1 The overall structure diagram of the weighing device capable of automatically selecting bag film thickness provided in the embodiments of the present application;

[0053] Figure 2 The structure block diagram of the weighing device capable of automatically selecting bag film thickness provided in the embodiments of the present application;

[0054] Figure 3 The determination logic diagram of the determination submodule in the embodiments of the present application for the actual weight obtained;

[0055] Figure 4The flow chart of the use method of the weighing device capable of automatically selecting the thickness of the bag film provided in the embodiments of the present application.

[0056] Reference signs:

[0057] 100, weighing module; 200, determination module; 300, switching module; 400, packaging module; 510, selected gripper; 520, conveying belt; 600, tensioning mechanism; 700, cutting mechanism. DETAILED DESCRIPTION

[0058] The technical solutions of the present application will be clearly and completely described in combination with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0059] The weighing device capable of automatically selecting the thickness of the bag film and the use method provided in the embodiments of the present application will be described in combination with Figures 1-4 .

[0060] Referring to FIG. 1, Figure 1 the weighing device capable of automatically selecting the thickness of the bag film provided in the embodiments of the present application comprises a weighing module 100, a determination module 200, a switching module 300, a packaging module 400 and a conveying module. The weighing module 100 is located at the frontmost position of the device and connected with the material conveying structure outside, for weighing the conveyed material and recording the actual weight of the weighed material. The determination module 200 is connected with the weighing module 100, which can be arranged side by side with the weighing module 100 or arranged behind the weighing module 100, for determining the actual weight of the weighed material according to the preset determination weight value in the determination module 200, and calculating or selecting the required bag film thickness, the required heat sealing temperature and the required heat sealing time and other packaging parameters according to the determination result and the corresponding parameters preset in the determination module 200. The switching module 300 is arranged behind the determination module 200 for dynamically responding to the required bag film thickness according to the result determined by the determination module 200 in time, and switching the packaging bag film of the corresponding thickness. The packaging module 400 is arranged at the endmost position of the device, for packaging and storing the weighed material according to the obtained required heat sealing temperature and required heat sealing time. The conveying module is composed of a plurality of corresponding selected grippers 510 and conveying belts 520, for conveying the weighed material according to the determination result. At least one selected gripper 510 is arranged between the weighing module 100 and the determination module 200, between the determination module 200 and the switching module 300, and between the switching module 300 and the packaging module 400, to facilitate the transfer and conveying between the modules.

[0061] The weighing module 100 is arranged to weigh the material to be packaged, and the determination module 200 is arranged to determine the weight, and according to the different weights, the corresponding thickness of the packaging bag film is selected, and the switching module 300 is arranged to switch the corresponding thickness of the packaging bag film to the corresponding station in time, and then the packaging module 400 is arranged to package the material according to the corresponding heat sealing temperature and heat sealing time, so that the device can use the bag film thickness as needed, improve the flexibility of production, and support seamless switching of multiple thicknesses of bag film, so that it can adapt to the weighing needs of materials of various weights, save packaging material costs, and reduce the risk of material scattering.

[0062] In some 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 support a load. 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. The weighing device can be a sensor system that can display the weight of the object in real time, which is composed of a pressure sensor and an analog-to-digital converter, or it can be a mature device commonly seen on the market, such as an electronic scale or a weighing sensor. This is not limited.

[0063] Please continue to refer to Figure 2 As shown in Figure 2 The structure block diagram of the weighing device provided by the embodiment of the present application, which can automatically select the thickness of the bag film. In this embodiment, the determination module 200 includes:

[0064] a determination submodule and a calculation submodule. The determination submodule is used to determine the actual weight of the material obtained after passing through the weighing module 100 according to the preset determination weight value, and divide the thickness range of the bag film required by the material according to the determination result.

[0065] The calculation submodule is provided with a plurality of preset calculation coefficients for selecting the corresponding preset coefficient, preset bag film thickness and preset heat sealing temperature according to the thickness range divided by the determination submodule, and calculating the required bag film thickness and required heat sealing time of the weighed material, wherein the preset calculation coefficient includes a plurality of preset coefficients, preset bag film thickness, preset heat sealing temperature and preset heat sealing time.

[0066] Please continue to refer to Figure 3 As shown in Figure 3 The determination logic diagram of the determination submodule in the embodiment of the present application for the actual weight obtained. 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.

[0067] The determination sub-module determines the actual weight of the obtained material according to the preset determination weight value, and the determination process is as follows:

[0068] If the actual weight is less than the first preset determination weight, it is determined that the required bag film interval is a thin bag film, and a first preset bag film thickness is directly selected as the required bag film thickness.

[0069] If the actual weight is greater than or equal to the first preset determination weight and less than or equal to the second preset determination weight, it is determined that the required bag film interval is a normal bag film.

[0070] If the actual weight is greater than the second preset determination weight, it is determined that the required bag film interval is a thick bag film.

[0071] In some embodiments, the calculation sub-module includes a first calculation sub-module for calculating the required bag film thickness and a second calculation sub-module for calculating the required heat sealing time.

[0072] The first calculation sub-module 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 less than the second preset bag film thickness.

[0073] When the required bag film interval after determination is a normal bag film, the first calculation sub-module calculates according to the first preset calculation coefficient and the first preset bag film thickness to obtain a normal bag film thickness as the required bag film thickness.

[0074] When the required bag film interval after determination is a thick bag film, the first calculation sub-module calculates according to the second preset calculation coefficient and the second preset bag film thickness to obtain a larger bag film thickness as the required bag film thickness.

[0075] Hs' = H1 + (Ms - M1)K1, Hs'' = H2 + (Ms - M2)K2, Hs' is the normal bag film thickness, Hs'' is the larger 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 determination weight, M2 is the second preset determination weight, K1 is the first preset coefficient, and K2 is the second preset coefficient.

[0076] In this embodiment, the first preset bag film thickness H1, the second preset bag film thickness H2, the first preset coefficient K1, and the second preset coefficient K2 should be set according to the casting material and the actual number of layers of the selected bag film.

[0077] For example, when the selected bag film material is a single-layer PE film, the following table provides a bag film thickness and bearing capacity correspondence table when the bag film material is a single-layer PE film:

[0078] Table 1. Bag film thickness and corresponding load capacity table.

[0079]

[0080] According to the corresponding data in Table 1, when the bag film thickness is between 0.04mm and 0.08mm, the change relationship between the maximum load in the load range and the bag film thickness is in direct proportion, that is, each increase of 0.01mm in thickness can increase the maximum load by 5kg. Since the load capacity starts to decrease significantly at 0.03mm, in order to prevent the selected bag film from being too thin to cause the material to spill out, and to avoid the bag film 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 the bag film with a thickness of 0.03mm is used to package materials below 2kg. At this time, the first preset coefficient K1 can be calculated as K1=0.01mm / 5kg=0.002mm / kg;

[0081] When the bag film thickness is greater than 0.08mm, the proportion between the maximum load and the bag film thickness still changes in direct proportion, but as can be seen from the table below, the load range at 0.08mm has a significant jump layer, so the preset bag film thickness participating in the calculation still needs to be selected to ensure the calculation accuracy. Therefore, 0.08mm can be selected as the second preset bag film thickness, that is, H2=0.08mm. Since the change relationship between the maximum load and the bag film thickness remains the same, the second preset coefficient can be set as K2=K1=0.02mm / kg. When the selected bag film material is other materials, K1 and K2 should still be recalculated according to the actual change relationship.

[0082] The selection of the first preset determination weight and the second preset determination weight should be based on the 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, M1=2kg and M2=20kg can be selected correspondingly.

[0083] In some embodiments, the second calculation sub-module 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.

[0084] When the required bag film interval after determination is 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;

[0085] When the required bag film interval after determination is a normal bag film, the first preset heat sealing temperature is selected as the required heat sealing temperature, and the high-temperature heat sealing time is obtained by calculation according to the first preset heat sealing time and the third preset coefficient as the required heat sealing time;

[0086] When the required bag film interval after determination is 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 obtained by calculation according to the second preset heat sealing time and the fourth preset coefficient as the required heat sealing time;

[0087] 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.

[0088] In the embodiment, the selected 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 selected bag film used for packaging and the actual number of layers thereof, wherein the first preset heat sealing temperature is used for heating the packaging bag film with a bag film interval of a thin bag film and a normal bag film, and the second preset heat sealing temperature is used for heating the packaging bag film with a bag film interval of a thick bag film.

[0089] For example, when the selected bag film material is still a single-layer PE film, after inquiring the heat sealing process basic parameters of the PE material, it is known that the melting point temperature of LDPE (low-density polyethylene) is between 105-115℃, and the melting point temperature of HDPE (high-density polyethylene) is between 126-136℃, and in the conventional heat sealing process, the standard heat sealing temperature corresponding to the two is 120-160℃ and 135-180℃, respectively. Therefore, by comprehensively considering, in order to avoid the preset temperature being too high to melt the thinner bag film, 135℃ can be selected as the first preset heat sealing temperature, and in order to avoid the required heat sealing time being too long due to the bag film being too thick to affect the overall production efficiency, the heat sealing temperature for the thick bag film should be appropriately increased to reduce the required heat sealing time, so the second preset heat sealing temperature is selected in the range of 135-160℃, and 145℃ is selected as the second preset heat sealing temperature in the embodiment.

[0090] The selected first preset heat sealing time, second preset heat sealing time, third preset coefficient and fourth preset coefficient should be selected and calculated according to the selected first preset heat sealing temperature and second preset heat sealing temperature, for example, the following tables respectively provide the corresponding tables of normal bag film heat sealing time and bag film thickness under heat sealing temperature determination and the corresponding tables of thick bag film heat sealing time and bag film thickness under heat sealing temperature determination:

[0091] Table 2. Common bag film heat sealing time and bag film thickness corresponding table.

[0092]

[0093] Table 3. Thick bag film heat sealing time and bag film thickness corresponding table.

[0094]

[0095] According to the data in Table 2 and Table 3, when the packaging bag film material is a single-layer PE film and the first preset heat sealing temperature is 135°C, when the bag film thickness is in the common bag film interval, the change relationship between the required heat sealing time and the bag film thickness is proportional, that is, each increase of 0.02mm in thickness requires an increase of 0.3 seconds in heat sealing time, and when the bag film thickness is in the thick bag film interval and the second preset heat sealing temperature is 145°C, although the change relationship between the required heat sealing time and the bag film thickness is still proportional, the heat sealing time is significantly prolonged each time, that is, each increase of 0.01mm in thickness requires an increase of 0.5 seconds in heat sealing time, so at this time, the heat sealing time corresponding to 0.03mm and 0.08mm can be taken as the corresponding first preset heat sealing time and second preset heat sealing time, 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;

[0096] And since the load-bearing capacity starts 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 avoid the bag film 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 bag films with a thickness of 0.03mm are used to package materials weighing less than 2kg, at this time, K1=0.01mm / 5kg=0.002mm / kg can be calculated.

[0097] And when the bag film thickness is greater than 0.08mm, the proportion between the maximum load and the bag film thickness still changes proportionally, but as can be seen from the table below, the load range at 0.08mm has a significant jump, so the preset bag film thickness participating in the calculation still needs to be selected to ensure the calculation accuracy, so 0.08mm can be selected as the second preset bag film thickness, that is, H2=0.08mm, and since the change relationship between the maximum load and the bag film thickness remains unchanged, the second preset coefficient can be set as K2=K1=0.02mm / kg, and when the selected bag film material is other materials, K1 and K2 should still be recalculated according to the actual change relationship.

[0098] In some embodiments, the switching module 300 comprises:

[0099] The multi-station bag film support, the pneumatic film changing device, and the tension calibration device, wherein the multi-station bag film support is used to load bag films of different thicknesses, the switching station of the multi-station bag film support is at least three, the pneumatic film changing device is connected to the multi-station bag film support, and the multi-station bag film support can be driven to rotate by the set pneumatic driving element, which is used to drive the multi-station bag film support to switch according to the required bag film thickness. Similarly, as another embodiment of the present embodiment, a servo driving device can also be used to replace the pneumatic driving device to drive the bag film support to switch the film. The pneumatic film changing device is only one of the ways to realize the film switching movement of the switching module 300, and it is not the only way. Therefore, it is not limited here.

[0100] The tension calibration device is connected to the multi-station bag film support, which is used to detect and calibrate the real-time tension of the switched bag film, so that the bag film used for packaging can always be in the required tension state.

[0101] In some embodiments, the packaging module 400 comprises a heating device for heating the bag film and a pressing device for pressing the heated bag film;

[0102] In the present embodiment, the heating device can be selected according to the actual situation of the required production scene. It can be any one of a plurality of heating devices that can provide heating to the bag film, such as an electric heating device, an infrared heating device, a high-frequency induction heating device, and an ultrasonic heating device. Similarly, the selection of the pressing device is also the same. It can be any pressure facility that can meet the pressing pressure of the bag film, such as a pneumatic pressing device, a servo pressing device, or a mature heat sealing device commonly used on the market, such as an electric heating heat sealing machine and a high-frequency induction sealing machine.

[0103] The packaging module 400 further comprises:

[0104] The pre-coating mechanism is provided in front of the heating device and is connected to the determination sub-module.

[0105] The pre-coating mechanism can coat the packaging bag film determined as a thin bag film with hot melt adhesive to form a hot melt adhesive pre-coating layer, so as to enhance the sealing strength of the sealing part of the thin bag film.

[0106] Please refer to the figure again, 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.

[0107] The tensioning mechanism 600 and the cutting mechanism 700 are arranged between the switching module 300 and the packaging module 400, and are used for tensioning the packaging bag film after switching and cutting the packaging bag film according to a preset bag film length, so as to package the material after weighing.

[0108] Please continue to refer to Figure 4 As Figure 4 As shown in the flowchart of the use method of the weighing device capable of automatically selecting the bag film thickness provided by the embodiment of the present application, in particular, the embodiment further provides a use method of the weighing device capable of automatically selecting the bag film thickness based on any one of the above, comprising:

[0109] In step S1, the material transported by the conveying device is weighed by the weighing module 100, and the actual weight of the weighed material is recorded;

[0110] In step S2, the recorded actual weight is determined by the determination sub-module in the determination module 200, so as to divide the thickness interval of the required bag film, and the corresponding parameters are selected and calculated by the calculation sub-module in the determination module 200 according to the divided thickness interval, so as to determine the required bag film thickness, the required heat sealing temperature and the required heat sealing time for subsequent packaging;

[0111] In step S3, the packaging bag film with the corresponding thickness is switched to the corresponding station by the switching module 300 according to the required bag film thickness obtained;

[0112] In step S4, the packaging bag film loaded with the corresponding material is heated and packaged by the packaging module 400 according to the required heat sealing temperature and the required heat sealing time obtained, and the packaging is completed.

[0113] In particular, the weighing device capable of automatically selecting the bag film thickness provided by the embodiment of the present application can achieve the same technical effect by executing the above use method, which will not be described here.

[0114] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0115] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0116] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "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 or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0117] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions 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 appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0118] 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 limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A weighing device that can automatically select a bag film thickness, characterized by, The application relates to a bag film packaging system. The system comprises: a weighing module for weighing the delivered materials; a judging module connected with the weighing module for judging the actual weight of the weighed materials according to preset judging weight values and selecting or calculating the required bag film thickness, the required heat sealing temperature and the required heat sealing time according to the judging result; a switching module connected with the judging module for selecting the packaging bag film with the corresponding thickness according to the required bag film thickness; a packaging module connected with the judging module and the switching module for packaging the weighed materials according to the required heat sealing temperature and the required heat sealing time; a conveying module composed of multiple selected grippers and corresponding conveying belts for conveying the weighed materials to the packaging module for packaging according to the judging result; the weighing module comprises a bearing device and a weighing device, the bearing device is a plate or a box body structure capable of bearing any weight, and the weighing device is arranged in or at the bottom of the bearing device to weigh the materials falling into the bearing device; the judging module comprises: a judging submodule for judging the actual weight of the materials obtained after passing through the weighing module according to preset judging weight values and dividing the thickness interval of the required bag film according to the judging result; a calculating submodule provided with multiple preset calculation coefficients for selecting the corresponding preset coefficient, the preset bag film thickness and the preset heat sealing temperature according to the thickness interval divided by the judging submodule and calculating the required bag film thickness and the required heat sealing time of the weighed materials according to the above parameters; the preset judging weight values comprise a first preset judging weight and a second preset judging weight, and the first preset judging weight is smaller than the second preset judging weight; the judging process of the judging submodule for the actual weight of the obtained materials is as follows: if the actual weight is smaller than the first preset judging weight, the required bag film interval is determined as 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 judging weight and smaller than or equal to the second preset judging weight, the required bag film interval is determined as an ordinary bag film; 2. A scale apparatus that automatically selects a bag film thickness according to claim 1, characterized by: if the actual weight is greater than the second preset judging weight, the required bag film interval is determined as a thick bag film. the calculating submodule comprises a first calculating submodule for calculating the required bag film thickness and a second calculating submodule for calculating the required heat sealing time; the first calculating 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 after judging is an ordinary bag film, the first calculating submodule calculates according to the first preset coefficient and the first preset bag film thickness to obtain the ordinary bag film thickness as the required bag film thickness; when the required bag film interval after judging is a thick bag film, the first calculating submodule calculates according to the second preset coefficient and the second preset bag film thickness to obtain the larger bag film thickness as the required bag film thickness. Hs' = H1 + (Ms - M1)K1, Hs'' = H2 + (Ms - M2)K2, Hs' is the normal bag film thickness, Hs'' is the larger 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.

3. A weighing device with automatic selection of the bag film thickness according to claim 2, characterized in that The second calculation sub-module 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 after judgment is 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 thereof; When the required bag film interval after judgment is a normal bag film, the first preset heat sealing temperature is selected as the required heat sealing temperature thereof, and a corrected heat sealing time is obtained as the required heat sealing time thereof by calculation according to the first preset heat sealing time and the third preset coefficient; When the required bag film interval after judgment is a thick bag film, the second preset heat sealing temperature is selected as the required heat sealing temperature thereof, and a high-temperature heat sealing time is obtained as the required heat sealing time thereof by calculation according to the second preset heat sealing time and the fourth preset coefficient. 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.

4. The automatically selectable bag film thickness weighing apparatus of claim 1, wherein: The switching module comprises: A multi-station bag film support is used to load bag films of different thicknesses, and the switching stations of the multi-station bag film support are at least three; A pneumatic film changing device is connected with the multi-station bag film support and is used to drive the multi-station bag film support to switch according to the required bag film thickness obtained; A tension calibration device is connected with the multi-station bag film support and is used to detect and calibrate the real-time tension of the switched bag film.

5. The automatically selectable bag film thickness weighing apparatus of claim 3, wherein: The packaging module comprises a heating device for heating the bag film and a pressing device for pressing the heated bag film; The packaging module further comprises: A pre-coating mechanism is arranged in front of the heating device and is connected with the judgment sub-module; The pre-coating mechanism can coat the packaging bag film judged as a thin bag film with hot melt adhesive to form a hot melt adhesive pre-coating layer.

6. The automatically selectable bag film thickness weighing apparatus of claim 1, wherein: Further comprising 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 package the weighed material subsequently.

7. A method of using a weighing device capable of automatically selecting the bag film thickness according to any one of claims 1-6, characterized in that, It comprises: Step S1: weighing the transported material by the weighing module and recording the actual weight of the weighed material; Step S2, the actual weight recorded is determined by a determination submodule in the determination module to divide the thickness interval of the required bag film, and the corresponding parameters are selected for calculation by a calculation submodule in the determination module according to the divided thickness interval to determine the required bag film thickness, the required heat sealing temperature and the required heat sealing time for subsequent packaging; Step S3, the packaging bag film of the corresponding thickness is switched to the corresponding station by the switching module according to the required bag film thickness obtained; Step S4, the packaging bag film filled with the corresponding material is heated and packaged by the packaging module according to the required heat sealing temperature and the required heat sealing time obtained, and the packaging is completed.

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