CN110642057B - Sanitary product production system and production method thereof - Google Patents

Sanitary product production system and production method thereof Download PDF

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Publication number
CN110642057B
CN110642057B CN201910902088.9A CN201910902088A CN110642057B CN 110642057 B CN110642057 B CN 110642057B CN 201910902088 A CN201910902088 A CN 201910902088A CN 110642057 B CN110642057 B CN 110642057B
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surface layer
roller
tension
leakage
traction roller
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CN110642057A (en
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凌国富
陈建筑
谢玉榜
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Fujian Hengan Household Life Article Co Ltd
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Fujian Hengan Household Life Article Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00Registering, tensioning, smoothing or guiding webs
    • B65H23/04Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1888Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00Registering, tensioning, smoothing or guiding webs
    • B65H23/04Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00Registering, tensioning, smoothing or guiding webs
    • B65H23/04Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/26Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/10Handled articles or webs
    • B65H2701/19Specific article or web
    • B65H2701/1924Napkins or tissues, e.g. dressings, toweling, serviettes, kitchen paper and compresses

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  • Absorbent Articles And Supports Therefor (AREA)

Abstract

The invention relates to a hygienic product production system which comprises a surface layer conveying mechanism, a leakage-proof edge separating conveying mechanism, a bottom film conveying mechanism and a PLC (programmable logic controller), wherein the surface layer conveying mechanism comprises two surface layer unwinding mechanisms, a surface layer automatic splicing mechanism, a reflection-type color code sensor, a first storage rack, a first traction roller, a first floating roller tension control mechanism, a surface layer tension proportional valve, a second traction roller, a guide roller, a laminating roller, a third traction roller, a first tension detector, a fourth traction roller, a high-speed camera, a second tension detector, a first composite conveying mechanism, a flow guide groove roller, a second composite conveying mechanism, a peripheral sealing roller and a forming cutter roller which are sequentially arranged along the conveying direction of a surface layer, and an encoder is arranged on the forming cutter roller. The invention can control the one-to-one correspondence relationship between the phase of the continuously transmitted surface layer pattern and the phase of the sanitary article, and control the tension among the surface layer, the two side leakage-proof separation edges and the bottom film of the sanitary article to keep stable in the production process.

Description

Sanitary product production system and production method thereof
Technical Field
The invention relates to the technical field of production equipment of disposable hygienic products, in particular to a hygienic product production system and a production method thereof.
Background
Sanitary napkins are disposable sanitary products that are discarded after use. Three-piece sanitary napkins generally have the following structure: the sanitary towel comprises a sanitary towel body and leakage-proof separation edges arranged on two sides of the sanitary towel body, wherein the sanitary towel body comprises a liquid-permeable surface layer (hereinafter called surface layer), a core body and a liquid-impermeable bottom film (hereinafter called bottom film) which are arranged in a laminated manner from top to bottom, and the sanitary towel body and the leakage-proof separation edges on the two sides of the sanitary towel body form a three-piece sanitary towel structure. The core body is used for absorbing and keeping human excretory fluid. The liquid-permeable topsheet is intended to provide a comfortable and dry feeling when in contact with the human skin, while allowing liquid to pass through into the absorbent core layer. The carrier film serves to prevent the passage of liquid from the absorbent core layer. The leakproof isolation boundaries at the two sides of the sanitary towel body are made of water-repellent materials such as leakproof non-woven fabrics.
At present, in the industry, the surface layer of the sanitary towel is a white non-pattern surface layer, only continuous feeding is needed in the production process, and the process is simple. However, with the homogenization of products in the market, the same products are competitive in the market, so that manufacturers need to improve the quality of the products continuously, and also need to enhance the aesthetic degree and the identification degree of the products to improve the competitiveness of the products.
The inventor points out that the arrangement of a fixed beat pattern on the surface layer of the sanitary towel needs to control the phase of the continuously transmitted surface layer pattern and the phase of the sanitary towel in a one-to-one correspondence relationship. The production process of the three-piece sanitary towel on the production line comprises the steps of firstly compounding the surface layer with the leakproof isolation edges on the two sides to form a three-piece structure, then compounding the absorption core layer on the three-piece structure, then compounding the bottom film, and finally cutting the bottom film by a forming cutter roller and conveying the bottom film to a subsequent production procedure for folding and packaging. If the tension of the surface layer is different from that of the leakproof isolation edges at two sides and the tension of the surface layer is different from that of the bottom layer in the production process, the produced product is shrunk, and the tension among the surface layer, the leakproof isolation edges at two sides and the bottom film of the sanitary towel body needs to be controlled to be kept stable in the production process.
Disclosure of Invention
Therefore, in order to solve the above problems, the present invention provides a system and a method for producing sanitary products, which controls the phase of a continuously transported surface layer pattern to correspond to the phase of a disposable sanitary product one by one, and controls the tension between the surface layer, the two side leakproof isolation boundaries and the bottom film of the sanitary product to be stable in the production process.
In order to achieve the purpose, the invention adopts the following technical scheme: the sanitary article production system comprises a surface layer conveying mechanism, a leakage-proof edge-separating conveying mechanism, a bottom film conveying mechanism and a PLC (programmable logic controller), wherein the surface layer conveying mechanism, the leakage-proof edge-separating conveying mechanism and the bottom film conveying mechanism are respectively in communication connection with the PLC through communication cables; the surface layer conveying mechanism comprises two surface layer unreeling mechanisms, a surface layer automatic splicing mechanism, a reflection-type color mark sensor, a first storage rack, a first traction roller, a first floating roller tension control mechanism, a second traction roller, a guide roller, a pressing roller, a third traction roller, a first tension detector, a fourth traction roller, a second tension detector, a first composite conveying mechanism, a flow guide groove roller, a second composite conveying mechanism, a peripheral sealing roller and a forming cutter roller which are sequentially arranged along the conveying direction of the surface layer, and further comprises a high-speed camera which is arranged between the fourth traction roller and the second tension detector and used for capturing surface layer patterns, wherein an encoder which synchronously rotates with the forming cutter roller is arranged on the forming cutter roller; the high-speed camera and the code are in communication connection with the PLC through communication cables respectively;
the leakage-proof partition conveying mechanism comprises two leakage-proof partition unreeling mechanisms, a leakage-proof partition automatic splicing mechanism, a second storage frame, a fifth traction roller, a second floating roller tension control mechanism, a right-angle guide rod, a splitting machine and a sixth traction roller which are sequentially arranged along the leakage-proof partition conveying direction, and the leakage-proof partition is guided into the pressing roller by the sixth traction roller to be compounded with the surface layer;
the basement membrane conveying mechanism comprises two basement membrane unreeling mechanisms, a basement membrane automatic splicing mechanism, a third storage rack, a seventh traction roller, a third floating roller tension control mechanism and an eighth traction roller which are sequentially arranged along the basement membrane conveying direction, and the basement membrane is led into a second composite conveying mechanism through the eighth traction roller to be compounded with the surface layer.
Furthermore, the first floating roller tension control mechanism, the second floating roller tension control mechanism and the third floating roller tension control mechanism respectively comprise two fixed rollers, a floating roller mounting seat arranged between the two fixed rollers, a floating roller arranged on the floating roller mounting seat, an air cylinder driving the floating roller to move on the floating roller mounting seat and an electric proportional valve, the air cylinder is electrically connected with the electric proportional valve, and the electric proportional valve is electrically connected with the PLC.
The production method of the sanitary product is applied to the production system of the sanitary product and comprises the following steps:
the method comprises the following steps that firstly, a PLC (programmable logic controller) presets a preset value BV of post-tension after the surface layer and the leakage-proof separation edge are compounded, a maximum value MaxV of post-tension after the surface layer and the leakage-proof separation edge are compounded, and a minimum value MinV of post-tension after the surface layer and the leakage-proof separation edge are compounded;
when the tension value of the first tension detector is a tension preset value BV after the surface layer and the leakage-proof separation edge are compounded, the working voltage of an electric proportional valve corresponding to the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism is PB; when the tension value of the first tension detector is detected to be the maximum value MaxV of the tension of the surface layer after the surface layer and the leakage-proof separation edge are compounded, the working voltage of the electric proportional valve corresponding to the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism is V1; when the tension value of the first tension detector is detected to be the minimum value MinV of the tension of the surface layer after the surface layer and the leakage-proof separation edge are compounded, the working voltage of the electric proportional valve corresponding to the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism is V2; the proportionality coefficient Kp is (V1-V2) 4000;
the forming cutter roller and the encoder rotate synchronously, the forming cutter roller rotates for a circle to correspond to a production period of a piece of sanitary product, the circumferential length of the forming cutter roller rotating for a circle is equally divided into 360 parts, a color code positioning point is arranged on each layer of the surface layer at intervals of the length of a piece of sanitary product, the circumferential angle of the encoder rotating for a circle is equally divided into 360 degrees, the angle of the encoder corresponds to the length of a piece of sanitary product, when the encoder rotates to 180 degrees, the high-speed camera is triggered to shoot an image and is sent to the PLC, the pixel of the high-speed camera is NxM, an image coordinate (the X axis is N, the Y axis is M) is established, the PLC detects the Y axis coordinate position B of the pixel of the color code positioning point in the image, and calculates the position of the color code positioning point in the image and converts the position into angle data A which is 180X B/M;
if A is more than or equal to 170 and less than or equal to 190, entering the second step; if 170 is greater than A, entering step three; if A is more than 190, entering a fourth step;
secondly, the PLC controls the surface layer conveying mechanism, the leakage-proof edge-separating conveying mechanism and the bottom film conveying mechanism to keep running according to the current production speed;
step three, the PLC controls the surface layer unreeling mechanism, the first traction roller, the second traction roller, the laminating roller, the third traction roller, the fourth traction roller, the leakage-proof edge-separating unreeling mechanism, the fifth traction roller, the splitting machine and the sixth traction roller to increase the speed, and because the surface layer unreeling mechanism, the first traction roller, the second traction roller, the laminating roller, the third traction roller and the fourth traction roller increase the speed, the tension of the surface layer and the leakage-proof edge-separating changes,
the first tension detector detects a tension value TV1 after the surface layer and the leakage-proof separation edge are compounded, and the PLC calculates a first floating roll tension control mechanism, a second floating roll tension control mechanism and a third floating roll tension control machineConstructed electric proportional valve working voltage compensation value deltaV1Kp (TV1-BV)/(MaxV-MinV), and PB- Δ as electric proportional valve operating voltage execution values SV of the first dancing roll tension control mechanism, the second dancing roll tension control mechanism, and the third dancing roll tension control mechanismV1
Until A is 180, the PLC controller controls the surface layer conveying mechanism and the leakage-proof edge-separating conveying mechanism to return to normal speed operation, and the operation returns to the step two;
step four, the PLC controls the surface layer unreeling mechanism, the first traction roller, the second traction roller, the laminating roller, the third traction roller, the fourth traction roller, the leakage-proof edge-separating unreeling mechanism, the fifth traction roller, the splitting machine and the sixth traction roller to reduce the speed, and because the surface layer unreeling mechanism, the first traction roller, the second traction roller, the laminating roller, the third traction roller and the fourth traction roller reduce the speed, the surface layer and the leakage-proof edge-separating tension are changed,
the second tension detector detects the tension value TV2 before the surface layer and the bottom film are compounded, and the PLC calculates the working voltage compensation value delta of the electric proportional valve of the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanismV2Kp (TV2-BV)/(MaxV-MinV), and PB-Delta (electric proportional valve operation execution voltage SV of the first, second and third dancer roll tension control mechanisms)V2
And (4) until A is 180, the PLC controls the surface layer conveying mechanism and the leakage-proof edge separating conveying mechanism to operate at normal speed again, and the step two is returned.
By adopting the technical scheme, the invention has the beneficial effects that: this health supplies production system is through being used for catching the high-speed camera of surface course pattern between fourth carry over pinch rolls and second tension detector, and be provided with the encoder with shaping cutter roll synchronous revolution on shaping cutter roll, the interval sets up the color code setpoint on the surface course, trigger high-speed camera when shaping cutter roll rotates a certain angle and shoot the pattern, Y axle coordinate position through the color code setpoint in the analysis pattern, can judge that it is leading or lagging at the surface course transmission, if the surface course transmission is leading, then reduce surface course conveying mechanism, leak protection separates limit conveying mechanism, basement membrane conveying mechanism's conveying speed. If the surface layer transmission is delayed, the conveying speeds of the surface layer conveying mechanism, the leakage-proof edge separating conveying mechanism and the bottom film conveying mechanism are increased.
The tension of the surface layer, the leakage-proof separation edges and the bottom film is changed in the transmission process no matter the transmission speed of the surface layer conveying mechanism, the leakage-proof separation edge conveying mechanism and the bottom film conveying mechanism is reduced or improved, once the tension of the surface layer, the leakage-proof separation edges and the bottom film is changed in the transmission process, the shrinkage of the sanitary product is caused, and the defective rate is high. Therefore, the tension of the surface layer, the leakproof isolation edge and the bottom film in the transmission process needs to be adjusted in real time. Specifically, if the surface layer transport lag is 170 > a, the first tension detector detects the pre-lamination tension value TV1 of the surface layer and the base film, and finally calculates the electric proportional valve operating voltage execution value SV of the first dancing roller tension control mechanism, the second dancing roller tension control mechanism, and the third dancing roller tension control mechanism to be PB- ΔV1(ii) a The tension of the surface layer, the leakproof isolation edge and the bottom film are kept consistent by adjusting the working voltage execution values of the electric proportional valves of the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism to be consistent; similarly, if the surface layer is advanced in transport, i.e. a > 190, the second tension detector detects the tension value TV2 before the surface layer and the bottom film are compounded, and finally calculates the electric proportional valve operating voltage execution value SV of the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism to be PB- ΔV2(ii) a The tensions of the surface layer, the leakage-proof separation edges and the bottom film are kept consistent by adjusting the working voltage execution values of the electric proportional valves of the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism to be consistent.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a dancing roll tension control mechanism according to an embodiment of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
The first embodiment is as follows:
referring to fig. 1 and 2, a hygienic product producing system according to the first embodiment includes a surface layer conveying mechanism, a leakproof edge-separating conveying mechanism, a bottom film conveying mechanism, and a PLC controller (not shown in the figure), where the surface layer conveying mechanism includes two surface layer unwinding mechanisms 1, an automatic surface layer splicing mechanism 2, a reflective color scale sensor 3, a first storage rack 4, a first pull roll 5, a first floating roll tension control mechanism 6, a second pull roll 7, a guide roll 8, a press roll 9, a third pull roll 10, a first tension detector 11, a fourth pull roll 12, a second tension detector 13, a first composite conveying mechanism 14, a guide groove roll 15, a second composite conveying mechanism 16, a peripheral sealing roll 17, and a forming cutter roll 18, and a high-speed camera 19 for capturing a surface layer pattern is further disposed between the fourth pull roll 12 and the second tension detector 13, the form cutter roll 18 is provided with an encoder (not shown) which rotates in synchronization with the form cutter roll 18.
The leakage-proof edge-separating conveying mechanism comprises two leakage-proof edge-separating unwinding mechanisms 21, a leakage-proof edge-separating automatic splicing mechanism 22, a second storage frame 23, a fifth traction roller 24, a second floating roller tension control mechanism 25, a right-angle guide rod 26, a splitting machine 27 and a sixth traction roller 28, wherein the leakage-proof edge-separating automatic splicing mechanism is sequentially arranged along the leakage-proof edge-separating conveying direction, and the leakage-proof edge-separating guiding pressing roller 9 is combined with a surface layer through the sixth traction roller 28.
The basement membrane conveying mechanism comprises two basement membrane unreeling mechanisms 29, an automatic basement membrane splicing mechanism 30, a third storage rack 31, a seventh drawing roller 32, a third floating roller tension control mechanism 33 and an eighth drawing roller 34 which are sequentially arranged along the basement membrane conveying direction, and the basement membrane is guided into the second composite conveying mechanism 16 by the eighth drawing roller 34.
The first floating roller tension control mechanism 6, the second floating roller tension control mechanism 25 and the third floating roller tension control mechanism 33 each include two fixed rollers 100, a floating roller mounting seat 200 disposed between the two fixed rollers 100, a floating roller 300 disposed on the floating roller mounting seat 200, an air cylinder (not shown in the figure) for driving the floating roller 300 to move on the floating roller mounting seat 200, and an electric proportional valve 400, wherein the air cylinder is electrically connected with the electric proportional valve 400, and the electric proportional valve 400 is electrically connected with a PLC controller. The above-described connection structure between the fixed roll 100, the dancer mounting 200, the dancer 300, and the cylinder is a prior art. The floating roll is controlled to move on the floating roll mounting seat 200 by adjusting the working voltage of the air cylinder, which is controlled by the electric proportional valve 400.
The two surface layer unwinding mechanisms 1, the surface layer automatic splicing mechanism 2, the reflection-type color mark sensor 3, the first storage rack 4, the first traction roller 5, the first floating roller tension control mechanism 6, the surface layer tension proportional valve 7, the second traction roller 7, the guide roller 8, the laminating roller 9, the third traction roller 10, the first tension detector 11, the fourth traction roller 12, the second tension detector 13, the first composite conveying mechanism 14, the guide groove roller 15, the second composite conveying mechanism 16, the peripheral sealing roller 17, the forming cutter roller 18, the high-speed camera 19, the encoder, the two leakage-proof edge separation unwinding mechanisms 21, the leakage-proof edge separation automatic splicing mechanism 22, the second storage rack 23, the fifth traction roller 24, the second floating roller tension control mechanism 25, the right-angle guide rod 16, the splitting machine 27, the sixth traction roller 28, the two basement membrane unwinding mechanisms 29, the basement membrane automatic splicing mechanism 30, the third storage rack 31, the first traction roller 5, the first floating roller tension control mechanism 6, the surface layer tension proportional valve, The seventh drawing roll 32, the third floating roll tension control mechanism 33 and the eighth drawing roll 34 are respectively connected with a PLC controller. All the above devices are existing devices.
Color code positioning points are arranged on the surface layer at intervals. When a roll of material (assumed as a roll of material a) being transported on the surface layer unwinding mechanism 1 is about to run out and another roll of material (assumed as B roll of material) needs to be spliced, the following operations are performed: and (3) manually guiding the roll B into the automatic splicing mechanism 2, and when an ultrasonic outer diameter sensor (not shown in the figure) on the surface layer unreeling mechanism 1 senses that the outer diameter of the used roll A reaches the alarm range of the ultrasonic outer diameter sensor, the PLC counts the time of the countdown X (X is less than or equal to 60) seconds, and meanwhile, the first storage rack 4 starts to store the surface layer. When the PLC counts the time and has the Y (Y is less than or equal to 5) seconds, the material storage frame 4 starts to release the materials, meanwhile, the PLC controls the speed of the surface layer unwinding mechanism 1 to be reduced, the reflection-type color mark sensor 3 starts to work after the PLC counts the time and finishes, the automatic splicing mechanism 2 splices the roll B materials to the roll A materials in operation when the radiation-type color mark sensor 3 detects a color mark locating point, and cuts off the residual pattern materials of the roll A being conveyed, namely, the automatic splicing is finished, the material storage frame 4 is gradually restored to the original state after the splicing is finished, and the surface layer unwinding mechanism 1 is gradually accelerated to be consistent with the speed of the surface layer conveying mechanism production line.
Example two:
the second embodiment provides a production method using the system for producing a sanitary product in the first embodiment, which includes the following steps:
the method comprises the following steps that firstly, a PLC (programmable logic controller) presets a preset value BV of post-tension after the surface layer and the leakage-proof separation edge are compounded, a maximum value MaxV of post-tension after the surface layer and the leakage-proof separation edge are compounded, and a minimum value MinV of post-tension after the surface layer and the leakage-proof separation edge are compounded;
when the tension value detected by the first tension detector 11 after the surface layer and the leakage-proof separation edge are compounded is a tension preset value BV, the working voltage of an electric proportional valve corresponding to the first floating roll tension control mechanism 6, the second floating roll tension control mechanism 25 and the third floating roll tension control mechanism 33 is PB; when the first tension detector 11 detects that the tension value of the composite surface layer and the leakage-proof separation edge is the maximum value MaxV of the surface layer tension, the working voltage of the electric proportional valve corresponding to the first floating roll tension control mechanism 6, the second floating roll tension control mechanism 25 and the third floating roll tension control mechanism 33 is V1; when the tension value detected by the first tension detector 11 after the surface layer and the leakage-proof separation edge are compounded is the minimum value MinV of the surface layer tension, the working voltage of the electric proportional valve corresponding to the first floating roll tension control mechanism 6, the second floating roll tension control mechanism 25 and the third floating roll tension control mechanism 33 is V2; the proportionality coefficient Kp is (V1-V2) 4000;
the forming cutter roller 18 and the encoder rotate synchronously, the forming cutter roller 18 rotates for a circle to correspond to a production period of a piece of sanitary product, the circumferential length of the forming cutter roller 18 rotating for a circle is equally divided into 360 parts, a color code positioning point is arranged on each surface layer at intervals of the length of a piece of sanitary product, the circumferential angle of the encoder rotating for a circle is equally divided into 360 degrees, the angle of the encoder corresponds to the length of a piece of sanitary product, when the encoder rotates to 180 degrees, the high-speed camera 19 is triggered to shoot an image and is sent to the PLC, the pixel of the high-speed camera 19 is N multiplied by M, an image coordinate (the X axis is N, the Y axis is M) is established, the PLC detects the Y axis coordinate position B of the pixel of the color code positioning point in the image, and calculates the position of the color code positioning point in the image and converts the position into angle data A is 180 multiplied by B/M;
if A is more than or equal to 170 and less than or equal to 190, entering the second step; if 170 is greater than A, entering step three; if A is more than 190, entering a fourth step;
secondly, the PLC controls the surface layer conveying mechanism, the leakage-proof edge-separating conveying mechanism and the bottom film conveying mechanism to keep running according to the current production speed;
step three, the PLC controller controls the surface layer unreeling mechanism 1, the first traction roller 5, the second traction roller 7, the laminating roller 9, the third traction roller 10, the fourth traction roller 12, the leakage-proof edge-separating unreeling mechanism 21, the fifth traction roller 24, the splitting machine 27 and the sixth traction roller 28 to increase the speed, and because the surface layer unreeling mechanism, the first traction roller 5, the second traction roller 6, the laminating roller 9, the third traction roller 10, the fourth traction roller 12, the leakage-proof edge-separating unreeling mechanism 21, the fifth traction roller 24, the splitting machine 27 and the sixth traction roller 28 increase the speed, the tension of the surface layer and the leakage-proof edge-separating changes,
the first tension detector 11 detects the composite tension value TV1 of the surface layer and the leakage-proof separating edge, and the PLC calculates the working voltage compensation value delta of the electric proportional valve of the first floating roll tension control mechanism 6, the second floating roll tension control mechanism 25 and the third floating roll tension control mechanism 33V1Kp (TV1-BV)/(MaxV-MinV), and PB- Δ as electric proportional valve operating voltage execution values SV of the first dancing roll tension control mechanism, the second dancing roll tension control mechanism, and the third dancing roll tension control mechanismV1(ii) a The tensions of the surface layer, the leakage-proof separation edge and the bottom film are kept consistent by adjusting the operating voltage execution values of the electric proportional valves of the first floating roll tension control mechanism 6, the second floating roll tension control mechanism 25 and the third floating roll tension control mechanism 33 to be consistent;
until A is 180, the PLC controller controls the surface layer conveying mechanism and the leakage-proof edge-separating conveying mechanism to return to normal speed operation, and the operation returns to the step two;
step four, the PLC controller controls the speed reduction of the surface layer unwinding mechanism 1, the first traction roller 5, the second traction roller 7, the laminating roller 9, the third traction roller 10, the fourth traction roller 12, the leakage-proof edge-separating unwinding mechanism 21, the fifth traction roller 24, the splitting machine 27 and the sixth traction roller 28, and because the speed reduction of the surface layer unwinding mechanism, the first traction roller 5, the second traction roller 6, the laminating roller 9, the third traction roller 10, the fourth traction roller 12, the leakage-proof edge-separating unwinding mechanism 21, the fifth traction roller 24, the splitting machine 27 and the sixth traction roller 28 causes the tension of the surface layer and the leakage-proof edge to change,
the second tension detector 13 detects the composite front tension value TV2 of the surface layer and the bottom film, and the PLC calculates the working voltage compensation value delta of the electric proportional valve of the first floating roll tension control mechanism 6, the second floating roll tension control mechanism 25 and the third floating roll tension control mechanism 33V2Kp (TV2-BV)/(MaxV-MinV), and PB-Delta (electric proportional valve operation execution voltage SV of the first, second and third dancer roll tension control mechanisms)V2(ii) a The tensions of the surface layer, the leakage-proof separation edge and the bottom film are kept consistent by adjusting the operating voltage execution values of the electric proportional valves of the first floating roll tension control mechanism 6, the second floating roll tension control mechanism 25 and the third floating roll tension control mechanism 33 to be consistent;
and (4) until A is 180, the PLC controls the surface layer conveying mechanism and the leakage-proof edge separating conveying mechanism to operate at normal speed again, and the step two is returned.
The production method of the sanitary article can control the tension among the surface layer, the two side leakage-proof separation edges and the bottom film of the sanitary article to keep stable in the production process.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (1)

1. The production method of the sanitary product is applied to a sanitary product production system, the sanitary product production system comprises a surface layer conveying mechanism, a leakage-proof edge-separating conveying mechanism, a bottom film conveying mechanism and a PLC (programmable logic controller), and the surface layer conveying mechanism, the leakage-proof edge-separating conveying mechanism and the bottom film conveying mechanism are respectively in communication connection with the PLC through communication cables; the surface layer conveying mechanism comprises two surface layer unreeling mechanisms, a surface layer automatic splicing mechanism, a reflection-type color mark sensor, a first storage rack, a first traction roller, a first floating roller tension control mechanism, a second traction roller, a guide roller, a pressing roller, a third traction roller, a first tension detector, a fourth traction roller, a second tension detector, a first composite conveying mechanism, a flow guide groove roller, a second composite conveying mechanism, a peripheral sealing roller and a forming cutter roller which are sequentially arranged along the conveying direction of the surface layer, and further comprises a high-speed camera which is arranged between the fourth traction roller and the second tension detector and used for capturing surface layer patterns, wherein an encoder which synchronously rotates with the forming cutter roller is arranged on the forming cutter roller; the high-speed camera and the code are in communication connection with the PLC through communication cables respectively;
the leakage-proof partition conveying mechanism comprises two leakage-proof partition unreeling mechanisms, a leakage-proof partition automatic splicing mechanism, a second storage frame, a fifth traction roller, a second floating roller tension control mechanism, a right-angle guide rod, a splitting machine and a sixth traction roller which are sequentially arranged along the leakage-proof partition conveying direction, and the leakage-proof partition is guided into the pressing roller by the sixth traction roller to be compounded with the surface layer;
the bottom film conveying mechanism comprises two bottom film unwinding mechanisms, a bottom film automatic splicing mechanism, a third storage rack, a seventh drawing roller, a third floating roller tension control mechanism and an eighth drawing roller which are sequentially arranged along the conveying direction of the bottom film, and the bottom film is guided into the second composite conveying mechanism through the eighth drawing roller to be compounded with the surface layer;
the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism respectively comprise two fixed rolls, a floating roll mounting seat arranged between the two fixed rolls, a floating roll arranged on the floating roll mounting seat, an air cylinder driving the floating roll to move on the floating roll mounting seat and an electric proportional valve, wherein the air cylinder is electrically connected with the electric proportional valve, and the electric proportional valve is electrically connected with a PLC (programmable logic controller), and the hygienic product production method of the hygienic product production system is characterized by comprising the following steps of:
the method comprises the following steps that firstly, a PLC (programmable logic controller) presets a preset value BV of post-tension after the surface layer and the leakage-proof separation edge are compounded, a maximum value MaxV of post-tension after the surface layer and the leakage-proof separation edge are compounded, and a minimum value MinV of post-tension after the surface layer and the leakage-proof separation edge are compounded;
when the tension value of the first tension detector is a tension preset value BV after the surface layer and the leakage-proof separation edge are compounded, the working voltage of an electric proportional valve corresponding to the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism is PB; when the tension value of the first tension detector is detected to be the maximum value MaxV of the tension of the surface layer after the surface layer and the leakage-proof separation edge are compounded, the working voltage of the electric proportional valve corresponding to the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism is V1; when the tension value of the first tension detector is detected to be the minimum value MinV of the tension of the surface layer after the surface layer and the leakage-proof separation edge are compounded, the working voltage of the electric proportional valve corresponding to the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism is V2; the proportionality coefficient Kp is (V1-V2) 4000;
the forming cutter roller and the encoder rotate synchronously, the forming cutter roller rotates for a circle to correspond to a production period of a piece of sanitary product, the circumferential length of the forming cutter roller rotating for a circle is equally divided into 360 parts, a color code positioning point is arranged on each layer of the surface layer at intervals of the length of a piece of sanitary product, the circumferential angle of the encoder rotating for a circle is equally divided into 360 degrees, the angle of the encoder corresponds to the length of a piece of sanitary product, when the encoder rotates to 180 degrees, the high-speed camera is triggered to shoot an image and is sent to the PLC, the pixel of the high-speed camera is NxM, an image coordinate (the X axis is N, the Y axis is M) is established, the PLC detects the Y axis coordinate position B of the pixel of the color code positioning point in the image, and calculates the position of the color code positioning point in the image and converts the position into angle data A which is 180X B/M;
if A is more than or equal to 170 and less than or equal to 190, entering the second step; if 170 is greater than A, entering step three; if A is more than 190, entering a fourth step;
secondly, the PLC controls the surface layer conveying mechanism, the leakage-proof edge-separating conveying mechanism and the bottom film conveying mechanism to keep running according to the current production speed;
step three, the PLC controls the surface layer unreeling mechanism, the first traction roller, the second traction roller, the laminating roller, the third traction roller, the fourth traction roller, the leakage-proof edge-separating unreeling mechanism, the fifth traction roller, the splitting machine and the sixth traction roller to increase the speed, and because the surface layer unreeling mechanism, the first traction roller, the second traction roller, the laminating roller, the third traction roller and the fourth traction roller increase the speed, the tension of the surface layer and the leakage-proof edge-separating changes,
the first tension detector detects a tension value TV1 after the surface layer and the leakage-proof separation edge are compounded, and the PLC calculates the working voltage compensation value delta of the electric proportional valve of the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanismV1Kp (TV1-BV)/(MaxV-MinV), and PB- Δ as electric proportional valve operating voltage execution values SV of the first dancing roll tension control mechanism, the second dancing roll tension control mechanism, and the third dancing roll tension control mechanismV1
Until A is 180, the PLC controller controls the surface layer conveying mechanism and the leakage-proof edge-separating conveying mechanism to return to normal speed operation, and the operation returns to the step two;
step four, the PLC controls the surface layer unreeling mechanism, the first traction roller, the second traction roller, the laminating roller, the third traction roller, the fourth traction roller, the leakage-proof edge-separating unreeling mechanism, the fifth traction roller, the splitting machine and the sixth traction roller to reduce the speed, and because the surface layer unreeling mechanism, the first traction roller, the second traction roller, the laminating roller, the third traction roller and the fourth traction roller reduce the speed, the surface layer and the leakage-proof edge-separating tension are changed,
the second tension detector detects the tension value TV2 before the surface layer and the bottom film are compounded, and the PLC calculates the working voltage compensation value delta of the electric proportional valve of the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanismV2Kp (TV2-BV)/(MaxV-MinV), and PB-Delta (electric proportional valve operation execution voltage SV of the first, second and third dancer roll tension control mechanisms)V2
And (4) until A is 180, the PLC controls the surface layer conveying mechanism and the leakage-proof edge separating conveying mechanism to operate at normal speed again, and the step two is returned.
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