Cutting device for concave leakage-proof bottom layer of paper diaper

Abstract

The utility model provides a paper diaper concave type leakage-proof bottom layer cutting device. The paper diaper concave type leakage-proof bottom layer cutting device comprises a rack, a conveying belt, a cutting assembly and a control system. The conveying belt and the cutting assembly are correspondingly arranged on the machine frame, the cutting assembly comprises a lower supporting plate, a cutting knife, a shaping plate and a telescopic device, the shaping plate and the lower supporting plate can draw close to each other through the telescopic device to clamp and shape cloth on the conveying belt, and protrusions and grooves which can be embedded with each other are correspondingly arranged on the shaping plate and the lower supporting plate respectively. A through groove allowing the protrusion to penetrate through is formed in the middle of the conveying belt, and the cutting knife surrounds the shaping plate and is arranged on the outer side of the shaping plate and can cut the cloth in the pressed state. Due to the fact that the corresponding protrusions and the corresponding grooves are formed in the shaping plate and the lower supporting plate, the problems that leakage-proof cloth on the bottom layer of the paper diaper is still in a plane sheet shape after being cut, a needed concave structure cannot be formed, and the tension force of the cloth is not uniform in the cutting process are solved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a cutting device for the concave leak-proof bottom layer of a diaper. Background Art

[0002] Diapers are mainly made by bonding non-woven fabrics, superabsorbent resins, elastic spandex filaments and other materials with hot melt adhesives. Diapers are divided into surface non-woven fabrics, absorbent cores, breathable membranes, adhesives, magic tapes, waist patch non-woven fabrics, bottom non-woven fabrics, etc. according to the materials of different parts of the diaper; existing diapers all use the bottom layer and the surface layer to wrap the middle core layer. At present, most of the diapers produced in China are in the shape of "I". During production, both the bottom layer and the surface layer fabrics are cut from sheet fabrics. Therefore, when the middle core layer expands, it will cause the bottom layer and the surface layer to bulge at the same time, affecting the wearing comfort. Moreover, when cutting the leak-proof bottom layer, the fabric cannot be tensioned synchronously in the longitudinal and transverse directions, resulting in low precision during fabric cutting.

[0003] The prior art CN202310141061.9 discloses a positioning mechanism for diaper cutting, including a frame. A single-chip microcomputer is fixedly installed on the end face of the frame. A cloth feeding mechanism is installed at the feeding port of the frame. The tail end of the frame is connected to a tensioning frame through two symmetrically arranged tensioning adjustment components. An out-cloth mechanism is installed between the inner surfaces of the tensioning frame. A waste cloth roll roller driven by a winding motor is rotatably connected at a position adjacent to the out-cloth mechanism before the inner surface of the frame. A screw rod distance adjustment module is installed in the middle of the frame. Although this invention can tension the fabric during cutting, there are still the following problems:

[0004] 1. This solution adjusts the tension of the fabric by adjusting the distance between the conveying rollers at both ends of the cutting knife. However, relying solely on adjusting the distance between the conveying rollers to tension the fabric may cause inconsistent tension forces at different positions of the fabric. Especially in the case of wide fabrics or when complex-shaped cutting is required, the difference in tension forces between the edge and the center of the fabric may affect the cutting quality.

[0005] 2. The existing leak-proof fabric of the bottom layer after cutting still belongs to a flat sheet fabric, which means that after cutting, the fabric is still laid flat on the horizontal plane without forming the required concave structure. This not only affects the subsequent assembly process, but also causes it to expand towards the fabric side when the diaper absorbs liquid, affecting the wearing comfort. Summary of the Utility Model

[0006] In view of this, the purpose of the present utility model is to provide a cutting device for the concave leak-proof bottom layer of a diaper. By setting corresponding protrusions and grooves on the shaping plate and the lower support plate, it solves the problems in the prior art that the leak-proof fabric of the bottom layer of the diaper is still in a flat sheet shape after cutting and cannot form the required concave structure, and the tension of the fabric is uneven during the cutting process.

[0007] The technical solution adopted by the present utility model to solve its technical problems is as follows:

[0008] Provide a cutting device for the concave leak-proof bottom layer of a diaper, including: a frame, a conveyor belt, a cutting assembly and a control system; the conveyor belt is arranged on the frame, the cutting assembly is arranged on the frame corresponding to the conveyor belt and can cut the fabric on the conveyor belt, and the control system can control the operation of each component.

[0009] The cutting assembly includes a lower support plate, a cutting knife, a shaping plate and a telescopic device. The lower support plate, the cutting knife and the shaping plate are arranged on the frame through the telescopic device. The shaping plate and the lower support plate are respectively arranged on the upper and lower sides of the conveyor belt and can be made to approach each other through the telescopic device to clamp and shape the fabric on the conveyor belt. The cutting knife is arranged outside the shaping plate around the shaping plate through the telescopic device and can cut the fabric in a pressed state. Corresponding protrusions and grooves that can be mutually engaged are respectively arranged on the shaping plate and the lower support plate. A through groove for the protrusion to pass through is opened in the middle of the conveyor belt along the conveying direction.

[0010] It should be noted that the control system is responsible for controlling the operation of the entire device, including but not limited to controlling the actions of the telescopic device to ensure the precise cooperation of the shaping plate and the lower support plate, and the cutting action of the cutting knife; and the length of the through groove of the conveyor belt should be at least equal to the length of the protrusion on the shaping plate plus a certain margin, which can ensure that the protrusion on the shaping plate can smoothly pass through the through groove on the conveyor belt and be mutually engaged with the groove on the lower support plate, so as to clamp and shape the fabric. The shape of the protrusion matches the structure of the absorbent core of the diaper to ensure that the core can be loaded; in this solution, the conveyor belt is fixed by the frame, and the conveyor belt is used to carry and move the fabric to be cut; the cutting assembly includes a lower support plate, a cutting knife, a shaping plate and a telescopic device, among which the shaping plate and the lower support plate can approach each other through the telescopic device, so that the protrusion on the shaping plate is engaged with the groove on the lower support plate, thereby positioning and shaping the fabric; the cutting knife is located outside the shaping plate and can cut the fabric in a pressed state through the telescopic device, improving the shape consistency of the cut fabric.

[0011] Preferably, the telescopic device is a plurality of telescopic cylinders, the control system is a PLC controller, the lower support plate, the cutting knife and the shaping plate are arranged on the frame through the telescopic cylinders, and the operation of the telescopic cylinders can be controlled by the PLC controller to control the mutual engagement of the lower support plate and the shaping plate and the cutting of the cutting knife.

[0012] It should be noted that the number and layout of the telescopic cylinders can be designed according to actual needs to ensure the smooth and coordinated movement of each component. The telescopic cylinders cooperate with the PLC controller to achieve precise movement control of each part of the cutting assembly, ensure uniform cloth tension during the cutting process, and improve the cutting accuracy; in this solution, through the telescopic action of the telescopic cylinders, the shaping plate and the lower support plate can approach each other, and the protrusions on the shaping plate pass through the through grooves on the conveyor belt and engage with the grooves on the lower support plate, so as to clamp and shape the cloth; the cutting knife also moves through the drive of the telescopic cylinder, so as to realize the cutting of the cloth; the control system adopts a PLC (programmable logic controller), and the PLC controller can be pre-programmed to control the operation of the telescopic cylinders according to the preset process parameters, realizing the engagement of the lower support plate and the shaping plate and the cutting of the cutting knife.

[0013] Preferably, a pressure sensor is arranged inside the telescopic cylinder, the pressure sensor is electrically connected to the control system, and the telescopic distance of the telescopic cylinder can be controlled through the data of the pressure sensor.

[0014] It should be noted that the pressure sensor is installed inside the telescopic cylinder, which can real-time monitor the pressure change of the telescopic cylinder and is electrically connected to the control system. When the cylinder acts, the pressure data detected by the pressure sensor will be transmitted to the control system (such as a PLC controller). By real-time monitoring the pressure, the control system can ensure that the pressure when the shaping plate and the lower support plate clamp the cloth is consistent, thereby improving the cutting accuracy, ensuring that the cut cloth has better shape and size consistency, not only enhancing the automation degree of the equipment, but also ensuring uniform cloth tension during the cutting process, thus improving the quality and production efficiency of the final product.

[0015] Preferably, a heating device and a temperature sensor are further included. The heating device and the temperature sensor are arranged on the shaping plate and are electrically connected to the control system, and the temperature sensor can real-time monitor the temperature on the shaping plate and control the heating temperature range of the heating device through the control system.

[0016] It should be noted that the heating device is installed on the shaping plate and is used to heat the fabric, reduce the rigidity of the fabric, thereby improving the shaping effect and making it easier to form the required concave structure. The heating device can be an electric heating element, such as a resistance heating wire or a heating sheet, which can convert electrical energy into heat energy. The temperature sensor is also installed on the shaping plate and is used to monitor the temperature of the shaping plate in real time to ensure that the heating device always operates within the preset temperature range, avoiding overheating or overcooling. The temperature sensor can be a thermocouple, a thermistor, etc., which can convert temperature changes into electrical signals. The control system controls the working state of the heating device according to the preset temperature range and the data feedback by the temperature sensor to maintain the temperature on the shaping plate within a suitable range.

[0017] Preferably, a waste separation device is further included. The waste separation device is arranged on the rack at the discharge end of the conveyor belt and can collect the cut fabric.

[0018] It should be noted that the waste separation device is installed at the discharge end of the conveyor belt, that is, the outlet position where the fabric is cut, and can automatically collect the waste generated during the cutting process, reducing the workload of manual waste collection.

[0019] Preferably, the waste separation device includes a guiding roller and a coiling device. The coiling device is arranged on the rack at the discharge end of the conveyor belt, and the guiding roller is arranged on the rack between the coiling device and the cutting group and can guide the waste into the coiling device for coiling.

[0020] It should be noted that the guiding roller is installed on the rack between the coiling device and the cutting assembly and is used to guide the cut waste to the coiling device. The guiding roller can be fixed or adjustable to adapt to the passage of waste with different thicknesses. The coiling device is usually a roller driven by a motor and is used to roll up and collect the waste. When the cutting is completed, the waste is guided by the guiding roller to the coiling device for coiling, while the cut leak-proof bottom layer continues to be conveyed along with the conveyor belt.

[0021] Preferably, the cross-section of the cutting knife is integrally V-shaped, and one side of it can be attached to the outer wall of the shaping plate.

[0022] It should be noted that the cross-section of the cutting knife is designed to be V-shaped. Such a design makes the two side edges of the cutting knife sharper, enabling it to cut into the fabric better and ensuring the cutting accuracy. Moreover, one side of the cutting knife is designed to be able to closely adhere to the outer wall of the shaping plate. The V-shaped design enables the cutting knife to more stably adhere to the outer wall of the shaping plate during the cutting process. In this way, during the cutting process, the cutting knife can cut along the contour of the shaping plate. Through the close adhesion between the cutting knife and the shaping plate, it can ensure that the edge of the cut fabric is neater and smoother.

[0023] The beneficial effects of the present utility model:

[0024] A cutting device for the concave leak-proof bottom layer of a disposable diaper provided by the present utility model, through the design of protrusions and grooves on the shaping plate and the lower support plate, enables the fabric to be effectively shaped before cutting, thereby improving the cutting accuracy. In addition, the pressure sensor in the telescopic cylinder monitors the pressure during the cutting process in real time to ensure uniform stress on the fabric during cutting, further improving the cutting quality; the application of the heating device makes the fabric softer and easier to shape after heating. Combining with the function of the shaping plate, the cut fabric can form the required concave structure, thus improving the protrusion problem caused by the expansion of the core layer during the use of the disposable diaper and enhancing the comfort of the wearer; the application of a control system (such as a PLC controller) realizes the automatic control of the cutting process. By using automatic control components such as pressure sensors, heating devices, and temperature sensors, real-time monitoring and adjustment of key parameters (such as pressure and temperature) during the cutting process are achieved, further improving the automation level of the equipment, reducing human operation errors, and improving production efficiency. At the same time, the cross-section of the cutting knife is designed as a V shape, making the cutting knife sharper and able to fit tightly with the shaping plate, ensuring the cutting quality; the addition of a waste separation device reduces the need for manual waste handling and further improves the automation level of the production line. Description of the Drawings

[0025] Figure 1 It is a three-dimensional schematic diagram of a cutting device for the concave leak-proof bottom layer of a disposable diaper according to Embodiment 1 of the present utility model.

[0026] Figure 2 It is a structural schematic diagram of the cutting assembly according to Embodiment 1 of the present utility model.

[0027] Figure 3 It is a structural schematic diagram of the shaping plate and the support plate according to Embodiment 1 of the present utility model.

[0028] Figure 4 It is a structural schematic diagram of the cutting knife according to Embodiment 1 of the present utility model.

[0029] Figure 5 It is a structural schematic diagram of the shaping plate according to Embodiment 1 of the present utility model.

[0030] Figure 6 It is a cross-sectional view of the driving cylinder according to Embodiment 1 of the present utility model.

[0031] In the figure: 1, frame; 2, conveyor belt; 21, through groove; 3, cutting assembly; 31, support plate; 311, groove; 32, cutting knife; 33, shaping plate; 331, protrusion; 34, telescopic device; 341, telescopic cylinder; 4, control system; 5, pressure sensor; 6, heating device; 7, temperature sensor; 8, waste separation device; 81, guide roller; 82, coiling device.

[0032] It should be noted that these drawings and text descriptions do not in any way limit the scope of the concept of the present utility model, but illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] Embodiment 1

[0035] As Figures 1-6 shown, a concave leak-proof bottom layer cutting device for disposable diapers includes: a frame 1, a conveyor belt 2, a cutting assembly 3, and a control system 4; the conveyor belt 2 is arranged on the frame 1, the cutting assembly 3 is correspondingly arranged on the frame 1 corresponding to the conveyor belt 2 and can cut the fabric on the conveyor belt 2, and the control system 4 can control the operation of each component.

[0036] The cutting assembly 3 includes a lower support plate 31, a cutting knife 32, a shaping plate 33, and a telescopic device 34. The lower support plate 31, the cutting knife 32, and the shaping plate 33 are arranged on the frame 1 through the telescopic device 34. The shaping plate 33 and the lower support plate 31 are respectively arranged on the upper and lower sides of the conveyor belt 2 and can be mutually approximated through the telescopic device 34 to clamp and shape the fabric on the conveyor belt 2. The cutting knife 32 is arranged outside the shaping plate 33 around the shaping plate 33 through the telescopic device 34 and can cut the fabric in a pressed state. Corresponding protrusions 331 and grooves 311 that can be mutually engaged are respectively arranged on the shaping plate 33 and the lower support plate 31. A through groove 21 for the protrusion 331 to pass through is formed in the middle of the conveyor belt 2 along the conveying direction.

[0037] The telescopic device 34 is a plurality of telescopic cylinders 341, the control system 4 is a PLC controller, and the lower support plate 31, the cutting knife 32 and the shaping plate 33 are arranged on the frame 1 through the telescopic cylinders 341, and the operation of the telescopic cylinders 341 can be controlled by the PLC controller to control the mutual engagement of the lower support plate 31 and the shaping plate 33 and the cutting by the cutting knife 32.

[0038] A pressure sensor 5 is arranged in the telescopic cylinder 341. The pressure sensor 5 is electrically connected to the control system 4, and the telescopic distance of the telescopic cylinder 341 can be controlled through the data of the pressure sensor 5.

[0039] It further includes a heating device 6 and a temperature sensor 7. The heating device 6 and the temperature sensor 7 are arranged on the shaping plate 33 and are electrically connected to the control system 4. The temperature sensor 7 can monitor the temperature on the shaping plate 33 in real time, and the heating temperature range of the heating device 6 can be controlled through the control system 4.

[0040] It further includes a waste separation device 8. The waste separation device 8 is arranged on the frame 1 at the discharging end of the conveyor belt 2 and can collect the cut fabric.

[0041] The waste separation device 8 includes a guide roller 81 and a coiling device 82. The coiling device 82 is arranged on the frame 1 at the discharging end of the conveyor belt 2, and the guide roller 81 is arranged on the frame 1 between the coiling device 82 and the cutting group and can guide the waste into the coiling device 82 for coiling.

[0042] The cross section of the cutting knife 32 is integrally V-shaped, and one side thereof can be attached to the outer side wall of the shaping plate 33.

[0043] The working principle and usage method of a concave leak-proof bottom layer cutting device for disposable diapers in this embodiment:

[0044] A concave leak-proof bottom cutting device for diapers provided in this embodiment places the fabric on the conveyor belt 2. After the conveyor belt 2 starts, the fabric is conveyed along the conveyor belt 2. As the fabric advances, the shaping plate 33 and the lower support plate 31 approach each other under the action of the telescopic cylinder 341. The protrusion 331 on the shaping plate 33 passes through the through groove 21 on the conveyor belt 2 and fits into the groove 311 on the lower support plate 31 to clamp and shape the fabric into the required concave structure. The heating device 6 heats the fabric by heating the shaping plate 33 to reduce the rigidity of the fabric and improve the shaping effect. The temperature sensor 7 monitors the temperature on the shaping plate 33 in real time and feeds it back to the control system 4 to ensure that the working temperature of the heating device 6 remains within the preset range. The cutting knife 32 is driven by the telescopic cylinder 341 to cut along the outer contour of the shaping plate 33. The V-shaped design of the cutting knife 32 ensures the accuracy of cutting and the neatness of the edge. The pressure sensor 5 in the telescopic cylinder 341 monitors and feeds back the pressure data to the control system 4 in real time to ensure the uniform tension of the fabric during cutting and improve the cutting accuracy. After cutting, the waste is guided by the guide roller 81 to the coiling device 82 for coiling, and the cut leak-proof bottom continues to move with the conveyor belt 2 to complete subsequent processing.

[0045] When in use, first ensure that all components are correctly installed and the power connection is normal. Then turn on the power and set various parameters in the control system 4, including the heating temperature, cutting position, etc. Place the fabric roll to be cut at the starting position of the conveyor belt 2; start the conveyor belt 2 to let the fabric start to move. Automatic cutting: After the fabric reaches the cutting area, the device automatically completes a series of actions such as shaping, heating, and cutting; the waste generated during cutting is sent into the coiling device 82 through the guide roller 81 for automatic collection. After completing a batch of cutting tasks, turn off the device and clean the waste separation device 8 to prepare for the next batch of production.

[0046] Finally, it should be noted that the above are only the preferred embodiments of the present utility model, which are only used to illustrate the technical solutions of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

[0047] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "upper end", "lower end", "upper surface", "lower surface", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0048] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage" and "setting" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A concave leak-proof bottom layer cutting device for disposable diapers, comprising: A frame (1), a conveyor belt (2), a cutting assembly (3) and a control system (4); the conveyor belt (2) is arranged on the frame (1), the cutting assembly (3) is arranged on the frame (1) corresponding to the conveyor belt (2) and can cut the fabric on the conveyor belt (2), and the control system (4) can control the operation of each component. It is characterized in that: The cutting assembly (3) includes a lower support plate (31), a cutting knife (32), a shaping plate (33) and a telescopic device (34). The lower support plate (31), the cutting knife (32) and the shaping plate (33) are arranged on the frame (1) through the telescopic device (34). The shaping plate (33) and the lower support plate (31) are respectively arranged on the upper and lower sides of the conveyor belt (2) and can be made to approach each other through the telescopic device (34) to clamp and shape the fabric on the conveyor belt (2). The cutting knife (32) is arranged outside the shaping plate (33) around the shaping plate (33) through the telescopic device (34) and can cut the fabric in a pressed state. Corresponding protrusions (331) and grooves (311) that can be mutually engaged are respectively arranged on the shaping plate (33) and the lower support plate (31), and a through groove (21) for the protrusion (331) to pass through is opened in the middle of the conveyor belt (2) along the conveying direction.

2. The concave leakage-proof bottom layer cutting device for disposable diapers according to claim 1, characterized in that: The telescopic device (34) is a plurality of telescopic cylinders (341), the control system (4) is a PLC controller, the lower support plate (31), the cutting knife (32) and the shaping plate (33) are arranged on the frame (1) through the telescopic cylinders (341), and the operation of the telescopic cylinders (341) can be controlled through the PLC controller to control the mutual engagement of the lower support plate (31) and the shaping plate (33) and the cutting knife (32) to perform cutting.

3. The concave leakage-proof bottom layer cutting device for disposable diapers according to claim 2, wherein: A pressure sensor (5) is arranged inside the telescopic cylinder (341), the pressure sensor (5) is electrically connected to the control system (4), and the telescopic distance of the telescopic cylinder (341) can be controlled through the data of the pressure sensor (5).

4. A concave leak-proof bottom layer cutting device for disposable diapers according to claim 1, characterized in that: It further includes a heating device (6) and a temperature sensor (7). The heating device (6) and the temperature sensor (7) are arranged on the shaping plate (33) and are electrically connected to the control system (4), and the temperature sensor (7) can monitor the temperature on the shaping plate (33) in real time and control the heating temperature range of the heating device (6) through the control system (4).

5. The concave leakage-proof bottom layer cutting device for a disposable diaper according to claim 1, wherein: It further includes a waste separation device (8). The waste separation device (8) is arranged on the frame (1) at the discharging end of the conveyor belt (2) and can collect the cut fabric.

6. A concave leakage-preventing bottom layer cutting device for disposable diapers according to claim 5, characterized in that: The waste separation device (8) includes a guiding roller (81) and a coiling device (82). The coiling device (82) is arranged on the frame (1) at the discharging end of the conveyor belt (2), and the guiding roller (81) is arranged on the frame (1) between the coiling device (82) and the cutting group and can guide the waste into the coiling device (82) for coiling.

7. A concave leakage-proof bottom layer cutting device for disposable diapers according to claim 1, characterized in that: The cross-section of the cutting knife (32) is integrally V-shaped, and one side of it can be attached to the outer wall of the shaping plate (33).

Images