A production equipment for sanitary napkins without plastic paper wrapping

Abstract

The present invention relates to the technical field of sanitary napkin production, and in particular to a plastic-free paper-wrapped sanitary napkin and its production equipment, wherein the plastic-free paper-wrapped sanitary napkin production equipment comprises: a feeding input end, a molding structure, a fixing structure and a packaging output end. The present invention realizes real-time monitoring and control of key parameters and quality in the production process by automatically supplying production raw materials to the molding structure, and arranging multiple quality detection devices in the molding structure and the fixing structure, ensuring that the finished sanitary napkin meets the standard requirements, and according to the primary quality inspection and secondary quality inspection in the production process, ensuring the stability of the performance and quality of the finished sanitary napkin, reducing the defective rate; improving the operation efficiency of the sanitary napkin production line through automatic feeding, primary shaping, secondary fixing and packaging output; ensuring the overall quality of the finished sanitary napkin; realizing the automated production of sanitary napkins, and improving the efficiency and stability of sanitary napkin production.

Description

Technical Field

[0001] The invention relates to the technical field of sanitary napkin production, in particular to a production device for sanitary napkins without plastic paper coating. Background Art

[0002] Ordinary sanitary napkins use plastic films as the bottom coating material. These plastic films are difficult to degrade. Large amounts of plastic films entering the natural environment may cause land and water pollution and affect the balance of the ecosystem. In addition, the use of plastic as the bottom coating material of sanitary napkins makes the sanitary napkins less breathable. During use by women, local moisture may occur, leading to the breeding of bacteria and causing gynecological diseases. In addition, traditional sanitary napkin production equipment requires a large amount of manpower to participate in the production process, including material handling, processing, packaging and other processes, which will increase labor costs, and manual operations may be relatively slow, the production cycle will be lengthened, and it cannot meet the needs of large-scale production. Since quality inspection cannot be carried out during the production process, the product quality is unstable, and highly uniform product quality cannot be achieved, affecting product consistency.

[0003] Chinese patent application publication number CN111685939A discloses a sanitary napkin production device, comprising a No. 1 processing platform (1) and a loading rack (5), wherein the loading rack (5) is mounted on one end of the No. 1 processing platform (1), and is characterized in that: a mounting groove (22) is provided at one end of the No. 1 processing platform (1), a mounting block (23) is fixedly mounted at one end of the loading rack (5), and the mounting block (23) is located inside the mounting groove (22), the mounting block (23) is fixedly connected to the mounting groove (22), and a No. 1 is fixedly mounted on the upper end of the loading rack (5). A material unloading rack (24), a No. 2 material unloading rack (25) is fixedly installed on one side of the loading rack (5), a No. 3 material unloading rack (26) is fixedly installed at the lower end of the loading rack (5), and a loading roller is movably installed at one end of the No. 1 material unloading rack (24), the No. 2 material unloading rack (25) and the No. 3 material unloading rack (26), a glue groove (27) is fixedly installed at the lower end of the No. 3 material unloading rack (26), and the glue groove (27) is located directly below the loading roller, and a control panel is fixedly installed on the outer surface of one side of the No. 1 processing platform (1), and a power cord is fixedly installed on one side of the control panel.

[0004] It can be seen that the current sanitary napkin production equipment cannot ensure the stable performance and quality of the finished sanitary napkin products and has low production efficiency. Summary of the invention

[0005] To this end, the present invention provides a production device for sanitary napkins without plastic paper coating, so as to overcome the problem that the sanitary napkin production equipment in the prior art cannot ensure the stable performance and quality of the finished sanitary napkins and has low production efficiency.

[0006] To achieve the above object, the present invention provides a production device for a sanitary napkin without a plastic paper coating, the production device comprising:

[0007] A material input end, which is used to provide various production materials of the plastic-free paper film sanitary napkin; wherein the various production materials include: the upper layer of water-permeable material, the liquid-absorbing core, the bottom layer of water-impermeable material and the plastic-free paper film;

[0008] A molding structure, which is used to operate the upper water-permeable material, the liquid-absorbing core, the bottom water-impermeable material and the plastic-free paper film according to standard molding specifications to form a sample to be tested, and to perform a quality test on the sample to be tested, and select the sample to be tested that has passed the quality test according to the result of the quality test as the sample to be fixed;

[0009] A fixing structure, which is used to perform a hot pressing process on the sample to be fixed to obtain a fixed sample, and perform a secondary quality inspection on the fixed sample, correct the initial hot pressing time and the initial hot pressing pressure according to the secondary quality inspection result, and select the fixed sample that passes the secondary quality inspection as the sample to be packaged according to the actual hot pressing time and the actual hot pressing pressure obtained after the correction;

[0010] The packaging output end is used to package the sample to be packaged to obtain a finished sanitary napkin.

[0011] Further, the molding structure includes: a stacking device, a first image detector, a collection device and a first control assembly;

[0012] The stacking device is used to stack the upper water-permeable material, the liquid-absorbing core, the bottom water-impermeable material and the plastic-free paper wrapping film in order from bottom to top to form the sample to be tested;

[0013] The first image detector is used to collect an image of the front side of the sample to be detected to obtain a first image;

[0014] The acquisition device is used to perform a gas permeability simulation test on the sample to be tested, and obtain a plurality of input flow rates and a plurality of output flow rates of gas on both sides of the sample to be tested based on the gas permeability simulation test;

[0015] The first control assembly is connected to the stacking device, the first image detector and the acquisition device respectively, and determines whether the shaping position performance of the sample to be detected is qualified according to the first image, and issues a first alarm signal based on the unqualified shaping position performance; and determines whether the air permeability performance of the sample to be detected is qualified according to the air permeability simulation experiment; issues a second alarm signal based on the unqualified air permeability performance; and marks the sample to be detected as the sample to be fixed based on the fact that both the shaping position performance and the air permeability performance are qualified.

[0016] Further, the fixing structure includes: a hot pressing device, a second image detector, a third image detector and a second control assembly;

[0017] The hot pressing device is used to perform hot pressing compression and hot pressing bonding on the raw materials of the sample to be fixed to obtain the fixed sample;

[0018] The second image detector is used to collect an image of the front side of the fixed sample to obtain a second image;

[0019] The third image detector is used to collect images of the side surface of the fixed sample to obtain a third image;

[0020] The second control assembly is connected to the hot pressing device, the second image detector and the third image detector respectively, and determines whether the fixing position performance and the edge bonding condition of the fixed sample are qualified according to the second image, and sends a first pressure adjustment signal based on the unqualified fixing position performance; determines the abnormal bonding level of the edge bonding condition based on the unqualified edge bonding condition; determines whether the adsorption performance and the surface flatness of the fixed sample are qualified according to the third image, and determines the abnormal adsorption level based on the unqualified adsorption performance; determines the abnormal wrinkle level based on the unqualified edge bonding condition; and marks the fixed sample as the sample to be packaged based on the fact that the fixing position performance, the adsorption performance, the edge bonding condition and the surface flatness are all qualified.

[0021] Furthermore, the first control assembly recognizes the first image to obtain each actual overlap degree; determines whether the molding position of each production raw material is qualified according to each actual overlap degree combined with a set standard overlap degree;

[0022] For any production material, if the absolute value of the difference between the actual overlap corresponding to the production material and the standard overlap is greater than the set standard position evaluation value and the actual overlap is less than the standard overlap; then the first control assembly determines that the standard position of the production material is unqualified; and determines that the production material meets the single alarm condition.

[0023] Further, the first control assembly determines that the performance of the stereotyped position is qualified according to the number of items that do not meet the single alarm condition, or issues the first alarm signal;

[0024] If all production materials do not meet the single alarm condition, the first control assembly determines that the performance of the fixed position of the sample to be tested is qualified;

[0025] If the number of items that do not meet the single alarm condition in each production raw material is less than three, the first control assembly determines that the molding position performance of the sample to be tested is unqualified and issues the first alarm signal.

[0026] Further, the first control assembly obtains an input overall flow rate value and an output overall flow rate value according to each input flow rate and each output flow rate; and determines that the air permeability is qualified according to the fourth difference absolute value combined with a set air permeability evaluation value, or issues the second alarm signal;

[0027] The fourth difference absolute value is the absolute value of the difference between the input overall flow rate value and the output overall flow rate value.

[0028] Further, the second control assembly recognizes the second image to obtain an actual contour area and a pixel point contour circle; determines that the fixed position performance is qualified according to the size and shape of the actual contour area and the plastic-free paper film, or issues the first pressure adjustment signal;

[0029] Determining the edge bonding condition according to the number of discontinuity points of the pixel point contour circle;

[0030] If there is no discontinuity point, the second control assembly determines that the edge bonding condition is qualified;

[0031] If the discontinuity point exists and is unique, the second control assembly determines that the edge bonding condition is unqualified, determines that the abnormal bonding level is level one, and issues a first time adjustment signal;

[0032] If the discontinuity point exists and is not unique, the second control assembly determines that the edge bonding condition is unqualified, determines that the abnormal bonding level is level 2, and issues a second pressure adjustment signal.

[0033] Furthermore, the second control assembly identifies the third image to obtain raised pixel points and actual side thickness; and determines the abnormal wrinkle level according to the number of raised pixel points;

[0034] If the raised pixel number is 0, the second control assembly determines that the surface flatness is qualified;

[0035] If the raised pixel point is unique, the second control assembly determines that the surface flatness is unqualified, determines that the abnormal wrinkle level is level one, and sends a second time adjustment signal;

[0036] If the raised pixel point is not unique, the second control assembly determines that the surface flatness is unqualified, determines that the abnormal wrinkle level is level two, and sends a third pressure adjustment signal.

[0037] Further, the second control assembly determines that the adsorption performance is qualified according to the actual side thickness in combination with a set thickness specification interval, or determines the abnormal adsorption level;

[0038] If the actual side thickness is less than or equal to the minimum critical value of the thickness specification range, the second control assembly determines that the adsorption performance is unqualified, determines that the abnormal adsorption level is level one, and issues a fourth pressure adjustment signal;

[0039] If the actual side thickness is greater than or equal to the maximum critical value of the thickness specification range, the second control assembly determines that the adsorption performance is unqualified, determines that the abnormal adsorption level is level 2, and issues a fifth pressure adjustment signal;

[0040] If the actual side thickness is greater than the minimum critical value and less than the set standard thickness, the second control assembly determines that the adsorption performance is qualified and sends a fourth time adjustment signal;

[0041] If the actual side thickness is greater than the standard thickness and less than the maximum critical value, the second control assembly determines that the adsorption performance is qualified and sends a third time adjustment signal.

[0042] Compared with the prior art, the beneficial effects of the present invention are that the present invention enables automatic supply of production raw materials through the first supply device, the second supply device, the third supply device and the fourth supply device, thereby improving production efficiency and reducing labor costs; through the quality inspection devices in the molding structure and the fixed structure, the key parameters and quality in the production process can be monitored and controlled in real time to ensure that the products meet the standard requirements, and a primary quality inspection and a secondary quality inspection are performed during the production process to ensure that the performance and quality of the products are stable and the defective rate is reduced; through automatic feeding, primary shaping, secondary fixing and packaging output, the operating links in the entire production process are relatively independent, which can improve the operation efficiency of the production line; through hot pressing treatment and quality inspection in the fixed structure, the structural stability and consistency of the product can be ensured, and the overall quality of the product can be improved; the automated production of sanitary napkins is realized, and the quality is strictly controlled, which helps to improve the efficiency of sanitary napkin production and product quality, and can meet the needs of mass production.

[0043] In particular, by identifying and calculating the real-time overlapping areas of the bottom layer of non-permeable material, the absorbent core and the upper layer of permeable material, it is ensured that the monitoring of the fixed position is real-time, and abnormal situations can be discovered and handled in time; through image recognition and calculation, automatic detection and comparison of the overlapping areas are realized, which reduces manual intervention and improves production efficiency; describing the actual overlap in percentage can more accurately reflect the fixed position of the bottom layer of non-permeable material, the absorbent core and the upper layer of permeable material, and avoid errors caused by subjective factors; by making multiple comparisons between the actual overlap of each part and the standard overlap to determine whether the fixed position of each part is qualified, the misjudgment rate can be effectively reduced to ensure product quality; according to the comparison results of the actual overlap of each part and the standard overlap, an alarm signal can be automatically issued to remind relevant personnel to handle it in time to ensure the normal progress of production; in summary, it has the advantages of real-time, automation, accuracy, multiple comparison and alarm functions, and can effectively improve production efficiency and product quality.

[0044] In particular, by calculating the overall input and output flow rates, the overall calculated value can be obtained to more accurately evaluate the air permeability performance; by calculating the absolute value of the fourth difference, it is intuitively judged whether the air permeability of the sample to be tested is qualified, and the automatic judgment and alarm functions are effectively realized, and the air permeability performance evaluation value can be set according to the conditions of the simulation test to avoid the influence of factors such as humidity and temperature on the test results, thereby improving the accuracy of the test results; marking the samples that have passed the fixed position performance and air permeability performance tests as samples to be fixed can realize the tracking and management of qualified samples.

[0045] In particular, by recognizing the image, the contour area and edge adhesion of the sample can be quickly and accurately obtained, saving the time and cost of manual operation; by comparing with the size and shape of the plastic-free paper packaging, the eligibility of the fixed position performance can be effectively judged, avoiding the inconvenience or hygiene problems caused by the unstable fixed position; by judging the pixel contour circle, the eligibility of the edge adhesion can be detected, and the abnormal adhesion level can be judged according to the number and position of the discontinuity points, thereby improving the accuracy of the edge adhesion; by detecting the raised pixel points and measuring the actual side thickness, the surface flatness and adsorption performance of the sample can be judged, and the abnormality can be judged according to the difference between the actual side thickness and the standard thickness. The normal adsorption level realizes the accurate evaluation of adsorption performance; by setting the standard thickness and the range of thickness that can be increased, the suitable specification range can be customized according to different types of sanitary napkins to meet the needs of different user groups; by calculating the difference between the actual side thickness and the standard thickness, it can be judged whether the adsorption performance of the sanitary napkin meets the requirements, and the corresponding time adjustment signal can be issued to adjust the production process in time to improve product quality; dividing the adsorption level into different levels can help production personnel understand the severity of the problem more clearly, and take corresponding measures to adjust and improve it; through the judgment and adjustment of the automatic control system, the subjectivity and instability of manual operation are reduced, and the production efficiency and consistency of product quality are improved.

[0046] In particular, by making real-time corrections to the initial hot-pressing pressure through the pressure adjustment signal, the pressure stability during the hot-pressing process can be ensured, and the situation in which the sample is not firmly fixed or damaged due to insufficient or excessive pressure can be avoided; by making real-time corrections to the initial hot-pressing time through the time adjustment signal, the accuracy and consistency of the hot-pressing time can be ensured, and product quality problems caused by too long or too short hot-pressing time can be avoided; by performing secondary hot-pressing treatment according to the actual hot-pressing pressure and the actual hot-pressing time, the quality inspection qualification of the fixed sample can be ensured, and the stability and reliability of the product can be further improved; by recording the fixed samples that have passed the secondary quality inspection as samples to be packaged, the qualified samples can be tracked. and management to ensure that only samples that meet the requirements are packaged into final sanitary napkin products; by packaging the samples to be packaged, the samples can be protected from the influence of the external environment, ensuring the hygiene and use effect of the final sanitary napkin products; through the automatic adjustment of the hot pressing device, the influence of human factors on the hot pressing quality can be reduced, and the stability and consistency of the production process can be improved; through real-time correction of the hot pressing pressure and hot pressing time, adjustments can be made according to actual conditions to ensure the quality of fixed samples to the greatest extent and reduce the defective rate of products; through the automated packaging output end, the packaging efficiency and consistency can be improved, the time and labor intensity of manual operation can be reduced, and production efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural diagram of a production device for sanitary napkins without plastic paper coating according to an embodiment of the present invention;

[0048] Figure 2 It is a structural diagram of a hot pressing device in a production device for sanitary napkins without plastic paper coating according to an embodiment of the present invention;

[0049] Figure 3 It is a logic diagram for judging the qualified performance of the fixed position in the production equipment of the sanitary napkin without plastic paper coating in the embodiment of the present invention;

[0050] Figure 4 It is a logic diagram for determining the abnormal wrinkle level in the production equipment of sanitary napkins without plastic paper coating in an embodiment of the present invention;

[0051] The figure includes: a feeding input end 1, a molding structure 2, a fixing structure 3, a packaging output end 4, a hot pressing groove 31, a hot pressing head 32, an air pump 33 and a telescopic rod 34. DETAILED DESCRIPTION

[0052] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0054] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0055] See also Figure 1-Figure 4 As shown, Figure 1 It is a structural diagram of a production device for sanitary napkins without plastic paper coating according to an embodiment of the present invention; Figure 2 It is a structural diagram of a hot pressing device in a production device for sanitary napkins without plastic paper coating according to an embodiment of the present invention; Figure 3 It is a logic diagram for judging the qualified performance of the fixed position in the production equipment of the sanitary napkin without plastic paper coating in the embodiment of the present invention; Figure 4 This is a logic diagram for determining abnormal wrinkle levels in a production device for sanitary napkins without plastic paper wrapping in an embodiment of the present invention.

[0056] The present invention provides a production device for a sanitary napkin without a plastic paper coating, the production device comprising:

[0057] The material input end 1 is used to provide various production materials of the plastic-free paper film sanitary napkin; it includes: a first supply device, a second supply device, a third supply device and a fourth supply device; wherein each production material includes: the upper layer water-permeable material, the liquid-absorbing core, the bottom layer water-impermeable material and the plastic-free paper film;

[0058] The first supply device is used to provide an upper layer of water-permeable material;

[0059] The second supply device is used to provide a liquid-absorbing core;

[0060] The third supply device is used to provide a bottom layer of impermeable material;

[0061] The fourth supply device is used to provide plastic-free paper packaging film;

[0062] The molding structure 2 is used to operate the upper water-permeable material, the liquid-absorbing core, the bottom water-impermeable material and the plastic-free paper film according to the standard molding specifications to form a sample to be tested, and to perform a quality inspection on the sample to be tested, and select the sample to be tested that has passed the quality inspection according to the result of the quality inspection as the sample to be fixed; it includes: a stacking device, a first image detector, a collection device and a first control assembly; wherein the standard molding specification is to stack the plastic-free paper film, the bottom water-impermeable material, the liquid-absorbing core and the upper water-permeable material in order from bottom to top; the one-time quality inspection includes: a fixed position performance inspection of the sample to be tested and a gas permeability inspection of the sample to be tested;

[0063] The stacking device is used to stack the upper water-permeable material, the liquid-absorbing core, the bottom water-impermeable material and the plastic-free paper film according to the standard forming specifications to form the sample to be tested;

[0064] The stacking device described in this embodiment adopts an automatic palletizer. Of course, other automatic stacking devices can also be used, which is not limited in this embodiment;

[0065] The automatic palletizer comprises: a mechanical arm and a positioning drive end;

[0066] The positioning drive end is used to drive the mechanical arm to transport each production raw material from each raw material point to each target point; a tray base is provided at the end of the mechanical arm, and the tray base is used to place each production raw material; wherein each raw material point includes: a first raw material point, a second raw material point, a third raw material point and a fourth raw material point; the first raw material point is a storage point for the upper layer of water-permeable material; the second raw material point is a storage point for the absorbent core; the third raw material point is a storage point for the bottom layer of non-water-permeable material; the fourth raw material point is a storage point for the non-plastic paper packaging;

[0067] The first image detector is used to collect an image of the front side of the sample to be detected to obtain a first image;

[0068] The acquisition device is used to perform a gas permeability simulation test on the sample to be tested, and obtain the input flow rate and the output flow rate of the gas on both sides of the sample to be tested based on the gas permeability simulation test;

[0069] The collection device described in this embodiment uses a gas flow rate detector. Of course, other collection instruments may also be used, such as a gas sensor, a gas pressure gauge, etc., which are not specifically limited in this embodiment;

[0070] The gas flow rate detector comprises: a plurality of gas input ends, a plurality of input gas flow rate meters and a plurality of output gas flow rate meters;

[0071] Each gas input end is evenly distributed on one side of the sample to be detected, so as to deliver gas to the sample to be detected; each input gas flow meter is evenly distributed on one side of the sample to be detected, so as to detect the actual flow rate of the input gas at each position on one side of the sample to be detected, so as to obtain the corresponding input flow rate; each output gas flow meter is evenly distributed on the other side of the sample to be detected, so as to detect the actual flow rate of the output gas at each position on the other side of the sample to be detected, so as to obtain the corresponding output flow rate;

[0072] The first control assembly is connected to the stacking device, the first image detector and the acquisition device respectively, and judges whether the fixed position performance of the sample to be tested is qualified according to the first image, and issues a first alarm signal if the fixed position performance is unqualified; and judges whether the air permeability performance of the sample to be tested is qualified according to the air permeability simulation experiment; issues a second alarm signal if the air permeability performance is unqualified; and marks the sample to be tested as the sample to be fixed if both the fixed position performance and the air permeability performance are qualified;

[0073] The fixing structure 3 is used for subjecting the sample to be fixed to hot pressing treatment to obtain a fixed sample, and performing secondary quality inspection on the fixed sample, and selecting the fixed sample that has passed the secondary quality inspection as the sample to be packaged according to the result of the secondary quality inspection; it comprises: a hot pressing device, a second image detector, a third image detector and a second control assembly; wherein the secondary quality inspection comprises: a fixed position performance inspection of the fixed sample, an adsorption performance inspection of the fixed sample, an edge bonding condition inspection of the fixed sample and a surface flatness inspection of the fixed sample;

[0074] The hot pressing device is used to perform hot pressing compression and hot pressing bonding on the raw materials of each layer of the sample to be fixed to obtain the fixed sample;

[0075] The hot pressing device described in this embodiment adopts a hot pressing tablet press. Of course, other hot pressing devices can also be used, which is not limited in this embodiment;

[0076] The hot pressing tablet press comprises: a hot pressing head 32, a hot pressing groove 31, an air pump 33 and a telescopic rod 34;

[0077] The air pump 33 is used to drive the telescopic rod 34 to extend and retract, so that the telescopic rod 34 drives the hot pressing head 32 to perform hot pressing treatment on the sample to be fixed placed in the hot pressing groove 31; wherein the shape of the hot pressing head 32 is consistent with the shape of the finished sanitary napkin, and the hot pressing head 32 includes: an edge pressing head and a non-edge pressing head; the edge part is used to perform hot pressing and bonding on the sample to be fixed; the non-edge pressing head is used to perform hot pressing and compression on the sample to be fixed;

[0078] The second image detector is used to collect an image of the front side of the fixed sample to obtain a second image;

[0079] The third image detector is used to collect images of the side surface of the fixed sample to obtain a third image;

[0080] The second control assembly is connected to the hot pressing device, the second image detector and the third image detector respectively, and judges whether the fixing position performance and the edge bonding condition of the fixed sample are qualified according to the second image, and sends a first pressure adjustment signal based on the unqualified fixing position performance; determines the abnormal bonding level of the edge bonding condition based on the unqualified edge bonding condition; judges whether the adsorption performance and the surface flatness of the fixed sample are qualified according to the third image, and determines the abnormal adsorption level based on the unqualified adsorption performance; determines the abnormal wrinkle level based on the unqualified edge bonding condition; and marks the fixed sample as the sample to be packaged based on the fact that the fixing position performance, the adsorption performance, the edge bonding condition and the surface flatness are all qualified;

[0081] A packaging output terminal 4 is used to package the sample to be packaged to obtain the finished sanitary napkin;

[0082] The packaging output end described in this embodiment adopts a packaging machine. Of course, other automated packaging mechanical equipment, such as a sealing machine, etc., can also be adopted, and this embodiment does not make specific limitations.

[0083] The embodiment of the present invention enables the production raw materials to be automatically supplied through the first supply device, the second supply device, the third supply device and the fourth supply device, thereby improving production efficiency and reducing labor costs; through the quality inspection devices in the molding structure and the fixed structure, the key parameters and quality in the production process can be monitored and controlled in real time to ensure that the products meet the standard requirements, and a primary quality inspection and a secondary quality inspection are performed during the production process to ensure the stability of product performance and quality and reduce the defective rate; through automatic feeding, primary shaping, secondary fixing and packaging output, the operation links in the entire production process are relatively independent, which can improve the operation efficiency of the production line; through hot pressing treatment and quality inspection in the fixed structure, the structural stability and consistency of the product can be ensured, and the overall quality of the product can be improved; the automated production of sanitary napkins is realized, and the quality is strictly controlled, which helps to improve the efficiency of sanitary napkin production and product quality, and can meet the needs of mass production.

[0084] Specifically, in this embodiment, the first control assembly recognizes the first image to obtain a first actual overlap area, a second actual overlap area, and a third actual overlap area;

[0085] The first actual overlap degree is the percentage of the real-time overlap area of ​​the bottom layer impermeable material falling into the first standard area to the area of ​​the first standard area;

[0086] The second actual overlap degree is the percentage of the real-time overlap area of ​​the absorbent core falling into the second standard area to the area of ​​the second standard area;

[0087] The third actual overlap degree is the percentage of the real-time overlap area of ​​the upper layer of water-permeable material falling into the third standard area to the area of ​​the third standard area;

[0088] Wherein, the first standard area is the orthographic projection of the bottom layer impermeable material on the plastic-free paper film when the standard geometric center point of the plastic-free paper film coincides with the first geometric midpoint of the bottom layer impermeable material;

[0089] The second standard area is the orthographic projection of the absorbent core on the plastic-free paper film when the standard geometric center point of the plastic-free paper film coincides with the second geometric midpoint of the absorbent core;

[0090] The third standard area is the orthographic projection of the upper layer of water-permeable material on the plastic-free paper film when the standard geometric center point of the plastic-free paper film coincides with the third geometric midpoint of the upper layer of water-permeable material;

[0091] The first control assembly calculates a first difference absolute value S1 according to the first actual overlap degree D1 and the standard overlap degree D0, where S1=|D1-D0|;

[0092] If S1≤S0, the first control assembly determines that the first fixed position of the bottom layer impermeable material is qualified;

[0093] If S1>S0 and D1>D0, the first control assembly determines that the first shaping position of the bottom layer impermeable material is qualified;

[0094] If S1>S0 and D1<D0, the first control assembly determines that the first shaping position of the bottom layer impermeable material is unqualified;

[0095] Wherein, the standard overlap degree D0 and the fixed position evaluation value S0 are set in the first control assembly;

[0096] In the specific implementation process, the standard overlap degree D0 is set to 89%, and the stereotyped position evaluation value S0 is set to 5%. The specific settings are also affected by the actual production process indicators. In this embodiment, the actual production process indicators are that the sanitary napkin products that meet the requirements must reach more than 95% within one production cycle. The actual production process indicators are set according to the operation time of the production equipment and the degree of equipment aging. For example, when the production equipment has been working continuously for more than 50 hours and the equipment service life is four years, the actual production process indicator at this time is 93%, the standard overlap degree D0 should be set to 88%, and the stereotyped position evaluation value S0 should be set to 6%;

[0097] If the first fixed position is unqualified, it is determined that the bottom layer of impermeable material meets the single alarm condition;

[0098] If the first fixed position is qualified, it is determined that the bottom layer of impermeable material does not meet the single alarm condition;

[0099] The first control assembly calculates a second absolute difference value S2 according to the second actual overlap degree D2 and the standard overlap degree D0, where S2=|D2-D0|;

[0100] If S2≤S0, the first control assembly determines that the second fixed position of the liquid absorbent core is qualified;

[0101] If S2>S0 and D2>D0, the first control assembly determines that the second fixed position of the liquid absorbent core is qualified;

[0102] If S2>S0 and D2<D0, the first control assembly determines that the second shaping position of the absorbent core is unqualified;

[0103] If the second fixed-shape position is unqualified, it is determined that the wick meets the single alarm condition;

[0104] If the second fixed-shape position is qualified, it is determined that the wick does not meet the single alarm condition;

[0105] The first control assembly calculates a third difference absolute value S3 according to the third actual overlap degree D3 and the standard overlap degree D0, where S3=|D3-D0|;

[0106] If S3≤S0, the first control assembly determines that the third fixed position of the upper layer of water-permeable material is qualified;

[0107] If S3>S0 and D3>D0, the first control assembly determines that the third shaping position of the upper layer of water-permeable material is qualified;

[0108] If S3>S0 and D3<D0, the first control assembly determines that the third shaping position of the upper water-permeable material is unqualified;

[0109] If the third fixed position is unqualified, it is determined that the upper layer of water-permeable material meets the single alarm condition;

[0110] If the third fixed position is qualified, it is determined that the upper layer of water-permeable material does not meet the single alarm condition;

[0111] If the bottom layer of water-impermeable material, the wick and the upper layer of water-permeable material all fail to meet the single alarm condition, the first control assembly determines that the stereotyped position performance of the sample to be tested is qualified;

[0112] If the number of items that do not meet the single alarm condition among the bottom layer impermeable material, the absorbent core and the upper layer permeable material is less than three, the first control assembly determines that the shaping position performance of the sample to be tested is unqualified and issues the first alarm signal.

[0113] The embodiment of the present invention ensures that the monitoring of the fixed position is real-time by identifying and calculating the real-time overlap area of ​​the bottom layer non-permeable material, the liquid absorbent core and the upper layer permeable material, and can timely discover and handle abnormal situations; through image recognition and calculation, automatic detection and comparison of the overlap area are realized, manual intervention is reduced, and production efficiency is improved; the actual overlap is described in percentage form, which can more accurately reflect the fixed position of the bottom layer non-permeable material, the liquid absorbent core and the upper layer permeable material, and avoid errors caused by subjective factors; by performing multiple comparisons between the actual overlap of each part and the standard overlap to determine whether the fixed position of each part is qualified, the misjudgment rate can be effectively reduced and the product quality can be ensured; according to the comparison results of the actual overlap of each part and the standard overlap, an alarm signal can be automatically issued to remind relevant personnel to handle in time to ensure the normal progress of production; in summary, it has the advantages of real-time, automation, accuracy, multiple comparison and alarm functions, and can effectively improve production efficiency and product quality.

[0114] Specifically, in this embodiment, each input flow rate is obtained according to each input gas flow meter, including: a first input flow rate A1, a second input flow rate A2, ..., and an nth input flow rate An; each output flow rate is obtained according to each output gas flow meter, including: a first output flow rate B1, a second output flow rate B2, ..., and an nth output flow rate Bn;

[0115] The first control assembly calculates an input overall flow rate value Z1 according to each input flow rate; and calculates an output overall flow rate value Z2 according to each output flow rate;

[0116] Z1=(A1+A2+……+An) / n;

[0117] Z2=(B1+B2+……+Bn) / n;

[0118] Calculate a fourth difference absolute value S4=|Z1=Z2| according to the input overall flow rate value Z1 and the output overall flow rate value Z2;

[0119] If S4≤S40, the first control assembly determines that the air permeability of the sample to be tested is qualified;

[0120] If S4>S40, the first control assembly determines that the air permeability of the sample to be tested is unqualified, and issues the second alarm signal;

[0121] Wherein, S40 is the air permeability performance evaluation value set in the first control assembly;

[0122] In the specific implementation process, the specific setting of the air permeability evaluation value is affected by the simulation conditions in the air permeability simulation test, and the simulation conditions include: external temperature and external humidity; for example, if the external temperature is suitable and the external humidity is dry during the air permeability simulation test, the air permeability evaluation value should be set to a smaller value to avoid inaccurate testing caused by the influence of humidity and temperature during the actual use of the sanitary napkin;

[0123] Based on the fact that both the shaping position performance and the air permeability performance are qualified, the first control assembly marks the sample to be tested as the sample to be fixed.

[0124] The embodiment of the present invention can obtain an overall calculated value by calculating the overall input and output flow rates, and more accurately evaluate the air permeability performance; by calculating the fourth difference absolute value, it is intuitively judged whether the air permeability of the sample to be tested is qualified, and the automatic judgment and alarm functions are effectively realized, and the air permeability performance evaluation value can be set according to the conditions of the simulation test to avoid the influence of factors such as humidity and temperature on the test results, thereby improving the accuracy of the test results; the samples that have passed the fixed position performance and air permeability performance tests are marked as samples to be fixed, and the tracking and management of qualified samples can be realized.

[0125] Specifically, in this embodiment, the second control assembly recognizes the second image to obtain an actual contour area and a pixel point contour circle;

[0126] If the actual contour area is consistent with the size and shape of the plastic-free paper film, the second control assembly determines that the fixed position performance is qualified;

[0127] If the actual contour area is inconsistent with the size and shape of the plastic-free paper film, the second control assembly determines that the fixed position performance is unqualified and sends a first pressure adjustment signal;

[0128] If the pixel point contour circle has no discontinuities, the second control assembly determines that the edge bonding condition is qualified;

[0129] If the pixel point contour circle has a discontinuity point and the discontinuity point is unique, the second control assembly determines that the edge bonding condition is unqualified, determines that the abnormal bonding level is level one, and sends a first time adjustment signal;

[0130] If the pixel point contour circle has discontinuities and the discontinuities are not unique, the second control assembly determines that the edge bonding condition is unqualified, determines that the abnormal bonding level is level 2, and issues a second pressure adjustment signal;

[0131] The second control assembly recognizes the third image to obtain the raised pixel points and the actual side thickness of the fixed sample;

[0132] If the raised pixel number is 0, the second control assembly determines that the surface flatness is qualified;

[0133] If the raised pixel point is unique, the second control assembly determines that the surface flatness is unqualified, determines that the abnormal wrinkle level is level one, and sends a second time adjustment signal;

[0134] If the raised pixel point is not unique, the second control assembly determines that the surface flatness is unqualified, determines that the abnormal wrinkle level is level 2, and issues a third pressure adjustment signal;

[0135] The second control assembly is provided with a standard thickness H0 of the finished sanitary napkin, and determines a thickness specification interval [H0-H', H0+H'] of the finished sanitary napkin according to the standard thickness; H0-H' is the minimum critical value of the thickness specification interval, and H0+H' is the maximum critical value of the thickness specification interval;

[0136] If the actual side thickness H≤H0-H', the second control assembly determines that the adsorption performance is unqualified, determines that the abnormal adsorption level is level one, and issues a fourth pressure adjustment signal;

[0137] If the actual side thickness H≥H0+H', the second control assembly determines that the adsorption performance is unqualified, determines that the abnormal adsorption level is level 2, and issues a fifth pressure adjustment signal;

[0138] If the actual side thickness H0-H'<H<H0+H', the second control assembly determines that the adsorption performance is qualified;

[0139] Wherein, H' is the increaseable thickness set in the second control assembly;

[0140] In the specific implementation process, the standard thickness H0 is set to 2.5mm, and the thickness that can be increased H' is set to 0.5mm; the specific setting is also affected by the actual production specifications. The actual production specifications in this embodiment are that the thickness specifications of the sanitary napkins produced must be between [2mm, 3mm]. The actual production specifications are related to the type of sanitary napkins produced. For example, for ultra-thin sanitary napkins suitable for mild to moderate menstrual periods, the standard thickness H0 of the ultra-thin sanitary napkins should be set to 2.0mm, and the thickness that can be increased H' should be set to 0.2mm; for night-time sanitary napkins suitable for moderate to severe menstrual periods or for nighttime use and long-term non-replacement, the standard thickness H0 of the night-time sanitary napkins should be set to 3.0mm, and the thickness that can be increased H' should be set to 0.7mm;

[0141] When the adsorption performance of the fixed sample is appropriate, the second control assembly calculates a fifth difference S5 between the actual side thickness H and the standard thickness H0, where S5=H-H0;

[0142] If S5>0, the second control assembly sends a third time adjustment signal;

[0143] If S5<0, the second control assembly sends a fourth time adjustment signal;

[0144] If S5=0, the second control assembly determines that the adsorption performance is qualified and the adsorption level is excellent.

[0145] The embodiment of the present invention can quickly and accurately obtain the contour area and edge adhesion of the sample by recognizing the image, saving the time and cost of manual operation; by comparing with the size and shape of the plastic-free paper packaging, the eligibility of the fixed position performance can be effectively judged, avoiding the inconvenience or hygiene problems caused by the unstable fixed position; by judging the pixel point contour circle, the eligibility of the edge adhesion can be detected, and the abnormal adhesion level can be judged according to the number and position of the discontinuity points, thereby improving the accuracy of the edge adhesion; by detecting the raised pixel points and measuring the actual side thickness, the surface flatness and adsorption performance of the sample can be judged, and the difference between the actual side thickness and the standard thickness can be used to judge the eligibility of the sample. By determining the abnormal adsorption level, an accurate evaluation of the adsorption performance can be achieved; by setting the standard thickness and the range of thickness that can be increased, suitable specification ranges can be customized according to different types of sanitary napkins to meet the needs of different user groups; by calculating the difference between the actual side thickness and the standard thickness, it can be determined whether the adsorption performance of the sanitary napkin meets the requirements, and the corresponding time adjustment signal can be issued to adjust the production process in time to improve product quality; dividing the adsorption level into different levels can help production personnel understand the severity of the problem more clearly, and take corresponding measures to adjust and improve it; through the judgment and adjustment of the automatic control system, the subjectivity and instability of manual operation are reduced, and the production efficiency and consistency of product quality are improved.

[0146] Specifically, the hot pressing device in this embodiment performs hot pressing treatment on the sample to be fixed at an initial hot pressing time t0 and an initial hot pressing pressure F0;

[0147] The hot pressing device corrects the initial hot pressing pressure F0 in real time according to each pressure adjustment signal to obtain an actual hot pressing pressure F1;

[0148] The hot pressing device corrects the initial hot pressing time t0 in real time according to each time adjustment signal to obtain the actual hot pressing time t1;

[0149] The hot pressing device performs hot pressing treatment on the sample to be fixed with the actual hot pressing pressure F1 and the actual hot pressing time t1 to obtain the fixed sample that passes the secondary quality inspection, and the second control assembly records it as the sample to be packaged; the packaging output end 4 packages the sample to be packaged to obtain the finished sanitary napkin.

[0150] The embodiment of the present invention can ensure the pressure stability during the hot pressing process by correcting the initial hot pressing pressure in real time through the pressure adjustment signal, and avoid the situation where the sample is not firmly fixed or damaged due to insufficient or excessive pressure; the initial hot pressing time can be corrected in real time through the time adjustment signal, and the accuracy and consistency of the hot pressing time can be ensured, and the product quality problems caused by too long or too short hot pressing time can be avoided; by performing a secondary hot pressing process according to the actual hot pressing pressure and the actual hot pressing time, the quality inspection qualification of the fixed sample can be ensured, and the stability and reliability of the product can be further improved; by recording the fixed sample that has passed the secondary quality inspection as the sample to be packaged, the qualified sample can be checked. Tracking and management ensure that only samples that meet the requirements are packaged into final sanitary napkin products; by packaging the samples to be packaged, the samples can be protected from the influence of the external environment, ensuring the hygiene and use effect of the final sanitary napkin products; through the automatic adjustment of the hot pressing device, the influence of human factors on the hot pressing quality can be reduced, and the stability and consistency of the production process can be improved; through real-time correction of hot pressing pressure and hot pressing time, adjustments can be made according to actual conditions to ensure the quality of fixed samples to the greatest extent and reduce the defective rate of products; through the automated packaging output end, the packaging efficiency and consistency can be improved, the time and labor intensity of manual operation can be reduced, and production efficiency can be improved.

[0151] The calculation compensation parameters and the calculation adjustment parameters described in the present invention have two functions: one is to balance the left and right dimensions of the formula, and the other is to adjust the numerical results. No specific assignment is performed in this embodiment. In addition, the calculation formulas in this embodiment are used to intuitively reflect the adjustment relationship between the numerical values, such as positive correlation and negative correlation. Unless otherwise specified, the parameter values ​​that are not specifically limited to numerical values ​​are all positive.

[0152] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0153] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A production equipment for sanitary napkins without plastic paper coating, characterized in that: include: A material input end, which is used to provide various production materials of the sanitary napkin without plastic paper film; wherein the various production materials include: an upper layer of water-permeable material, a liquid-absorbing core, a bottom layer of non-water-permeable material and a non-plastic paper film; A molding structure, which is used to operate the upper water-permeable material, the liquid-absorbing core, the bottom water-impermeable material and the plastic-free paper film according to standard molding specifications to form a sample to be tested, and to perform a quality test on the sample to be tested, and select the sample to be tested that has passed the quality test according to the result of the quality test as the sample to be fixed; A fixing structure, which is used to perform a hot pressing process on the sample to be fixed to obtain a fixed sample, and perform a secondary quality inspection on the fixed sample, correct the initial hot pressing time and the initial hot pressing pressure according to the secondary quality inspection result, and select the fixed sample that passes the secondary quality inspection as the sample to be packaged according to the actual hot pressing time and the actual hot pressing pressure obtained after the correction; A packaging output end, used to package the sample to be packaged to obtain a finished sanitary napkin; The forming structure comprises: a stacking device, a first image detector, a collection device and a first control assembly; The stacking device is used to stack the upper water-permeable material, the liquid-absorbing core, the bottom water-impermeable material and the plastic-free paper wrapping film in order from bottom to top to form the sample to be tested; The first image detector is used to collect an image of the front side of the sample to be detected to obtain a first image; The acquisition device is used to perform a gas permeability simulation test on the sample to be tested, and obtain a plurality of input flow rates and a plurality of output flow rates of gas on both sides of the sample to be tested based on the gas permeability simulation test; The first control assembly is connected to the stacking device, the first image detector and the acquisition device respectively, and judges whether the fixed position performance of the sample to be tested is qualified according to the first image, and issues a first alarm signal if the fixed position performance is unqualified; and judges whether the air permeability performance of the sample to be tested is qualified according to the air permeability simulation test; issues a second alarm signal if the air permeability performance is unqualified; and marks the sample to be tested as the sample to be fixed if both the fixed position performance and the air permeability performance are qualified; The fixing structure includes: a hot pressing device, a second image detector, a third image detector and a second control assembly; The hot pressing device is used to perform hot pressing compression and hot pressing bonding on the raw materials of the sample to be fixed to obtain the fixed sample; The second image detector is used to collect an image of the front side of the fixed sample to obtain a second image; The third image detector is used to collect images of the side surface of the fixed sample to obtain a third image; The second control assembly is connected to the hot pressing device, the second image detector and the third image detector respectively, and judges whether the fixing position performance and edge bonding condition of the fixed sample are qualified according to the second image, and sends a first pressure adjustment signal based on the unqualified fixing position performance; determines the abnormal bonding level of the edge bonding condition based on the unqualified edge bonding condition; judges whether the adsorption performance and surface flatness of the fixed sample are qualified according to the third image, and determines the abnormal adsorption level based on the unqualified adsorption performance; determines the abnormal wrinkle level based on the unqualified edge bonding condition; and marks the fixed sample as the sample to be packaged based on the qualified fixing position performance, adsorption performance, edge bonding condition and surface flatness; The first control assembly recognizes the first image to obtain each actual overlap degree; determines whether the molding position of each production raw material is qualified according to each actual overlap degree combined with a set standard overlap degree; For any production material, if the absolute value of the difference between the actual overlap corresponding to the production material and the standard overlap is greater than the set setting position evaluation value and the actual overlap is less than the standard overlap; the first control assembly determines that the setting position of the production material is unqualified; and determines that the production material meets the single alarm condition; The first control assembly determines that the performance of the stereotyped position is qualified according to the number of items that do not meet the single alarm condition, or issues the first alarm signal; If all production materials do not meet the single alarm condition, the first control assembly determines that the fixed position performance of the sample to be tested is qualified; If the number of items that do not meet the single alarm condition in each production raw material is less than three, the first control assembly determines that the molding position performance of the sample to be tested is unqualified and issues the first alarm signal.

2. The production equipment of plastic-free paper-wrapped sanitary napkins according to claim 1, characterized in that: The first control assembly obtains an input overall flow rate value and an output overall flow rate value according to each input flow rate and each output flow rate; and determines that the air permeability is qualified according to the fourth difference absolute value combined with the set air permeability evaluation value, or issues the second alarm signal; The fourth difference absolute value is the absolute value of the difference between the input overall flow rate value and the output overall flow rate value.

3. The production equipment of plastic-free paper-wrapped sanitary napkins according to claim 2, characterized in that: The second control assembly recognizes the second image to obtain an actual contour area and a pixel contour circle; determines that the fixing position performance is qualified according to the size and shape of the actual contour area and the plastic-free paper packaging film, or issues the first pressure adjustment signal; Determining edge bonding conditions according to the number of discontinuities of the pixel point contour circle; If there is no discontinuity point, the second control assembly determines that the edge bonding condition is qualified; If the discontinuity point exists and is unique, the second control assembly determines that the edge bonding condition is unqualified, determines that the abnormal bonding level is level one, and issues a first time adjustment signal; If the discontinuity point exists and is not unique, the second control assembly determines that the edge bonding condition is unqualified, determines that the abnormal bonding level is level 2, and issues a second pressure adjustment signal.

4. The production equipment of plastic-free paper-wrapped sanitary napkins according to claim 3, characterized in that: The second control assembly identifies the third image to obtain raised pixel points and actual side thickness; and determines the abnormal wrinkle level according to the number of raised pixel points; If the raised pixel number is 0, the second control assembly determines that the surface flatness is qualified; If the raised pixel point is unique, the second control assembly determines that the surface flatness is unqualified, determines that the abnormal wrinkle level is level one, and sends a second time adjustment signal; If the raised pixel point is not unique, the second control assembly determines that the surface flatness is unqualified, determines that the abnormal wrinkle level is level two, and sends a third pressure adjustment signal.

5. The production equipment of plastic-free paper-wrapped sanitary napkins according to claim 4, characterized in that: The second control assembly determines whether the adsorption performance is qualified according to the actual side thickness and the set thickness specification range, or determines the abnormal adsorption level; If the actual side thickness is less than or equal to the minimum critical value of the thickness specification range, the second control assembly determines that the adsorption performance is unqualified, determines that the abnormal adsorption level is level one, and issues a fourth pressure adjustment signal; If the actual side thickness is greater than or equal to the maximum critical value of the thickness specification range, the second control assembly determines that the adsorption performance is unqualified, determines that the abnormal adsorption level is level 2, and issues a fifth pressure adjustment signal; If the actual side thickness is greater than the minimum critical value and less than the set standard thickness, the second control assembly determines that the adsorption performance is qualified and sends a fourth time adjustment signal; If the actual side thickness is greater than the standard thickness and less than the maximum critical value, the second control assembly determines that the adsorption performance is qualified and sends a third time adjustment signal.

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