阅读说明：本技术 卫生用品生产系统及其生产方法 (Sanitary product production system and production method thereof ) 是由 凌国富 陈建筑 谢玉榜 于 2019-09-24 设计创作，主要内容包括：本发明涉及卫生用品生产系统,包括面层输送机构、防漏隔边输送机构、底膜输送机构和PLC控制器,面层输送机构包括沿面层传送方向依次设置的两个面层放卷机构、面层自动拼接机构、反射型色标传感器、第一储料架、第一牵引辊、第一浮动辊张力控制机构、面层张力比例阀、第二牵引辊、导向辊、压合辊、第三牵引辊、第一张力检测器、第四牵引辊、高速摄像头、第二张力检测器、第一复合输送机构、导流槽辊、第二复合输送机构、周封辊、成型切刀辊,成型切刀辊上设有编码器。本发明能够控制连续传输的面层图案的相位与卫生用品的相位一一对应关系,并且控制卫生用品的面层、两侧防漏隔边和底膜之间的张力在生产过程中保持稳定。(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.)

1. Health supplies production system, its characterized in that: the anti-leakage floor film conveying device comprises a surface layer conveying mechanism, an anti-leakage edge-separating conveying mechanism, a bottom film conveying mechanism and a PLC (programmable logic controller), wherein the surface layer conveying mechanism, the anti-leakage 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.

2. The hygienic device production system as defined in claim 1, wherein: 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 fixing rolls, a floating roll mounting seat arranged between the two fixing 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, the air cylinder is electrically connected with the electric proportional valve, and the electric proportional valve is electrically connected with the PLC.

3. A method for producing sanitary product, which is applied to the system for producing sanitary product according to claim 2, comprising the 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 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 (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 valves of the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism_V1＝Kp*(TV1-BV)/(MaxV-MinV), the electric proportional valve operating voltage execution value SV of the first dancer roll tension control mechanism, the second dancer roll tension control mechanism, and the third dancer roll tension control mechanism is PB- Δ_V1；

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 mechanism_V2Kp (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.

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 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 (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 valves of the first floating roll tension control mechanism, the second floating roll tension control mechanism and the third floating roll tension control mechanism_V1Kp (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 mechanism_V1；

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 tension control mechanism of the first floating roll and the tension of the second floating rollElectric proportional valve working voltage compensation value delta of force control mechanism and third floating roll tension control mechanism_V2Kp (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- Δ_V1(ii) a By adjusting the tension of the first dancer roll, the second dancerThe working voltage execution values of the electric proportional valves of the roller tension control mechanism and the third floating roller tension control mechanism are consistent, so that the tensions of the surface layer, the leakage-proof separation edge and the bottom film are kept 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- Δ_V2(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.