Hot-pressing shaping equipment and method for three-dimensional leakage-proof partition edges of adult paper diapers

Abstract

The invention discloses a hot-pressing shaping device and method for a three-dimensional leakproof partition edge of an adult paper diaper, and relates to the field of absorption supplies, the shaping method comprises the following steps: S1, equally dividing the leakproof partition edge into a root area, a middle area and an edge area in sequence; s2, the root area is subjected to hot pressing; s3, the middle area is subjected to hot pressing; s4, performing hot pressing on the edge area; s5, directional air cooling is conducted on the root area obtained after hot pressing for 12-20 s; and S6, the hot-pressed middle area and the hot-pressed edge area are subjected to directional air cooling for 22-28 s, and the adult paper diaper three-dimensional leakage-proof partition edge is obtained. By adopting a three-area anisotropic hot-pressing shaping mode, the leakage-proof partition edges are subjected to differentiation treatment, so that the partition edges can dynamically adjust the shape according to leg activities and fit different body shape curves in real time, and compared with the global rigidification problem caused by traditional uniform hot-pressing, gaps during leg activities are effectively reduced, so that the side leakage risk is further reduced.

Description

Technical Field

[0001] This invention relates to the field of absorbent materials technology, and more particularly to diapers, specifically a heat-pressing shaping device and shaping method for three-dimensional leak-proof side panels of adult diapers. Background Technology

[0002] With the aging population and increasing demand for incontinence care, adult diapers, as essential hygiene products, directly impact users' health, safety, and dignity through their leak-proof performance. Leak-proof side panels, a key functional component of diapers, primarily use a three-dimensional structural design to block liquid leakage. Unlike baby diapers, adult users have significantly different body shapes (leg circumference can range from 30 to 70 cm), engage in vigorous daily activities (such as frequent turning over, sitting, and walking), and generally possess physiological characteristics such as fragile skin barriers, subcutaneous tissue atrophy, and poor peripheral blood circulation. Therefore, higher demands are placed on the dynamic fit and structural durability of the leak-proof side panels.

[0003] like Figure 1 As shown, traditional leak-proof barriers are usually made of multiple layers of composite materials, consisting of a skin-friendly non-woven fabric layer 1 (such as polypropylene PP material), an embedded elastic element 11 (such as polyurethane PU elastic cord), and a waterproof barrier layer 12 (such as polyethylene PE microporous membrane) from the inside out. They are bonded together with hot melt adhesive and hot-pressed into one piece.

[0004] In existing technologies, the hot-pressing shaping process for leak-proof partitions generally employs a uniform hot-pressing process across the entire area, using a mold to press and shape the partition material as a whole. For example, traditional processes often use flat or simple patterned molds to hot-press the partition under a single temperature and pressure, followed by natural cooling or air cooling to complete the shaping. While this method can achieve a basic three-dimensional structure, uniform hot pressing easily leads to the rigidity of the partition material across the entire area, with the molecular chains arranged in a uniform and dense manner, resulting in a loss of regional elasticity. When an adult's legs move, the material struggles to adapt to dynamic changes in curvature, generally forming gaps greater than 2mm at the groin creases, thus causing side leakage at night.

[0005] Therefore, it is necessary to improve upon the shortcomings of existing technologies in order to solve the above problems. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and provides a heat-pressing shaping device and shaping method for three-dimensional leak-proof side panels of adult diapers.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Firstly, the present invention provides a heat-pressing method for shaping three-dimensional leak-proof side panels of adult diapers, comprising the following steps: S1. The leak-proof partition is defined as the inner side from the side closest to the diaper core, and is divided into the root area, the middle area and the edge area from the inside to the outside. S2. Maintain the root zone at 115~123 ℃ and a pressure of 0.8~1.2 MPa for 3~6 s; S3. Maintain the central region at 100~105 ℃ and a pressure of 0.5~0.65MPa for 2~4 s; S4. Hold the edge area at 90~97 ℃ with a pressure of 0.35~0.4 MPa for 2~3 s; S5. After hot pressing, the root area is subjected to directional air cooling for 12-20 seconds at a wind speed of 8-10 m / s and a distance of 20-30 cm. S6. After hot pressing, the central and edge areas are subjected to directional air cooling at a wind speed of 1~3 m / s and a distance of 40~50 cm for 22~28 s to obtain the three-dimensional leak-proof side panels of adult diapers.

[0008] In a preferred embodiment of the present invention, the root region is formed by hot pressing using an upper mold and a lower mold with a continuous sawtooth groove structure having a groove depth of 1.6~3.5 mm.

[0009] In a preferred embodiment of the present invention, the central region is hot-pressed and shaped by a shaping upper mold and a shaping lower mold having a shallow, gently wavy groove structure with a groove depth of 0.8 to 2 mm.

[0010] In a preferred embodiment of the present invention, the edge region is hot-pressed and shaped by a shaping upper mold and a shaping lower mold having a smooth micro-arc surface structure with a curvature radius of 1.7~4 mm.

[0011] In a preferred embodiment of the present invention, in step S5, the cooling medium for the directional air cooling of the root region is compressed air at 15-18°C.

[0012] In a preferred embodiment of the present invention, in step S6, the cooling medium for directional air cooling in the central region and the edge region is ambient air at 24~30°C.

[0013] Secondly, the present invention provides a shaping device for a heat-pressing shaping method of three-dimensional leak-proof side panels for adult diapers, comprising: a device body, a placement and clamping mechanism disposed on the top of the device body for placing and clamping the diaper, and a plurality of linear guide rails installed on the top of the device body for driving the placement and clamping mechanism to translate in a working position. The top of the device body is fixed with a top plate by several support rods. The top plate is sequentially equipped with a root shaping mechanism, a middle shaping mechanism and an edge shaping mechanism along the direction of diaper travel. Each of the root shaping mechanism, the middle shaping mechanism and the edge shaping mechanism is equipped with an air-cooling component for directional air cooling of the diaper's leak-proof sidewalls on the side facing the direction of diaper travel. The root shaping mechanism, the middle shaping mechanism, and the edge shaping mechanism each include: a pressure block disposed at the bottom of the top plate, a mold support fixed at the bottom of the pressure block on the top of the equipment body, and a plurality of heating strips fixed at the bottom of the pressure block; an upper shaping mold is fixed at the bottom of the heating strips, a lower shaping mold is fixed at the top of the mold support, and a power assembly for driving the pressure block to apply shaping pressure is installed on the top plate; The upper and lower shaping molds have a continuous sawtooth groove in the root shaping mechanism, a gentle wave shallow groove in the middle shaping mechanism, and a smooth micro-arc surface in the edge shaping mechanism.

[0014] In a preferred embodiment of the present invention, the placement and clamping mechanism includes: at least two sets of translation frames; each set of translation frames includes: a plurality of sliders slidably connected to the top of the linear guide rail, a plurality of fixing blocks fixed to the top of the plurality of sliders, and a connecting plate fixed between the plurality of fixing blocks; an electric telescopic rod is installed on one side of the fixing blocks; A pressure strip is installed between the output end of the electric telescopic rod and the output end of the electric telescopic rod in the adjacent translation frame, for clamping the front or back waist area of ​​the diaper.

[0015] In a preferred embodiment of the present invention, the air-cooling assembly includes: an inverted T-shaped tube installed at the bottom of the top plate, a distribution pipe fixed at both ends of the bottom of the inverted T-shaped tube, and a plurality of air outlets fixed at the bottom of the distribution pipes for blowing air toward the root area, middle area, or edge area of ​​the leak-proof partition; a plurality of connecting rods are fixed at the bottom of the top plate, and the bottom of the plurality of connecting rods is fixed to the side of the inverted T-shaped tube; The inverted T-shaped tube is equipped with an air supply head for connecting to an external air supply device at the top of the upper surface of the top plate; the air supply device connected to the root shaping mechanism is used to supply compressed air at 15~18 ℃ to the air supply head; the air supply device connected to the middle shaping mechanism and the edge shaping mechanism is used to supply ambient air at 24~30 ℃ to the air supply head.

[0016] In a preferred embodiment of the present invention, the power assembly includes: a hydraulic cylinder mounted on the top of the top plate, and a translation plate fixed to the output end of the hydraulic rod at the bottom of the top plate; the two sides of the translation plate are slidably connected to the sides of the support rod through sleeves, and the bottom of the translation plate is fixed to the top of the pressure block.

[0017] This invention addresses the shortcomings of the prior art and has the following beneficial effects: (1) This invention provides a heat-pressing shaping device and shaping method for three-dimensional leak-proof side panels of adult diapers. By adopting a three-zone heterogeneous heat-pressing shaping method, the leak-proof side panels are differentiated. The root zone is formed by high temperature and high pressure and continuous sawtooth grooves, which makes the material molecular chains tightly arranged under directional pressure and form permanent plastic deformation, thus establishing a rigid support foundation. The middle zone is formed by medium temperature and medium pressure and gentle wave shallow groove structure, which promotes partial cross-linking of molecular chains to form a flexible hinge that can rebound. The edge zone is formed by low temperature and low pressure and smooth micro-arc surface treatment to maintain the original softness of molecular chains. In this way, the side panels can dynamically adjust their shape according to leg movements and fit different body curves in real time. Compared with the problem of rigidity across the entire area caused by traditional uniform heat pressing, it effectively reduces the gap during leg movements, thereby further reducing the risk of side leakage.

[0018] (2) In this invention, the combination of the continuous sawtooth groove, the gentle wave shallow groove structure and the smooth micro-arc surface structure formed by the mold partition can prevent the root from shifting when the leg moves. The elastic expansion and contraction of the wave shallow groove can compensate for the sudden change in local curvature. The micro-arc surface fits the skin folds and fills the micro gaps. Thus, the partition can dynamically adjust its shape according to the leg movement and fit different body curves in real time. It can work together to reduce the gap when the leg moves, thereby reducing the risk of side leakage.

[0019] (3) In this invention, the cooling is carried out in zones according to the regional characteristics. The root zone is cooled by forced directional air cooling, which locks the orientation of the molecular chains quickly after high temperature shaping, thus avoiding springback relaxation. The middle and edge zones are cooled by gentle convection, which can slowly release internal stress and maintain the elastic recovery ability of the molecular chains. This ensures that the three-dimensional partition after shaping can maintain its shape stability after wearing, activity and absorption of the core expansion, thus giving it good anti-collapse ability, thereby significantly improving the structural durability of the partition and further ensuring long-term leak-proof function. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the three-dimensional explosion structure of the existing leak-proof edge-sealing technology; Figure 2 This is a three-dimensional structural diagram of the shaping equipment according to a preferred embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the root shaping mechanism according to a preferred embodiment of the present invention; Figure 4This is a three-dimensional structural diagram of the middle shaping mechanism according to a preferred embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the edge shaping mechanism according to a preferred embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the placement and clamping mechanism according to a preferred embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of the air-cooled component according to a preferred embodiment of the present invention; Figure 8 This is a side view of the shaping equipment according to a preferred embodiment of the present invention; In the diagram: 1. Skin-friendly non-woven fabric layer; 11. Embedded elastic element; 12. Waterproof barrier layer; 2. Equipment body; 3. Linear guide rail; 4. Support rod; 5. Top plate; 6. Air-cooled assembly; 61. Inverted T-shaped tube; 62. Diverter pipe; 63. Air outlet; 64. Connecting rod; 65. Air supply head; 7. Pressure block; 71. Mold support; 72. Heating strip; 73. Upper mold; 74. Lower mold; 8. Translation frame; 81. Slider; 82. Fixing block; 83. Connecting plate; 84. Electric telescopic rod; 85. Pressure strip; 9. Hydraulic cylinder; 91. Translation plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0023] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. In the description of this invention, unless otherwise stated, "a number" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "setup," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] A heat-pressing method for shaping three-dimensional leak-proof side panels of adult diapers includes the following steps: S1. The leak-proof partition is defined as the inner side from the side closest to the diaper core, and is divided into the root area, the middle area and the edge area from the inside to the outside. S2. Maintain the root zone at 115~123 ℃ and a pressure of 0.8~1.2 MPa for 3~6 s; S3. Maintain the central region at 100~105 ℃ and a pressure of 0.5~0.65MPa for 2~4 s; S4. Hold the edge area at 90~97 ℃ with a pressure of 0.35~0.4 MPa for 2~3 s; S5. After hot pressing, the root area is subjected to directional air cooling for 12-20 seconds at a wind speed of 8-10 m / s and a distance of 20-30 cm. S6. After hot pressing, the central and edge areas are subjected to directional air cooling at a wind speed of 1~3 m / s and a distance of 40~50 cm for 22~28 s to obtain the three-dimensional leak-proof side panels of adult diapers.

[0026] In some specific embodiments, the root region is hot-pressed and shaped by a shaping upper mold 73 and a shaping lower mold 74 having a continuous sawtooth groove structure with a groove depth of 1.6 to 3.5 mm.

[0027] In some specific embodiments, the central region is hot-pressed and shaped by a shaping upper mold 73 and a shaping lower mold 74 having a shallow, gently wavy groove structure with a groove depth of 0.8 to 2 mm.

[0028] In some specific embodiments, the edge area is hot-pressed and shaped by a shaping upper mold 73 and a shaping lower mold 74 having a smooth micro-arc surface structure with a curvature radius of 1.7~4 mm.

[0029] In some specific implementations, in step S5, the cooling medium for directional air cooling of the root region is compressed air at 15~18°C.

[0030] In some specific implementations, in step S6, the cooling medium for directional air cooling in the central and edge areas is ambient air at 24~30°C.

[0031] To further simplify and make the present invention achieve its objectives and effects, the present invention will be further illustrated in conjunction with the following specific embodiments and comparative examples, but the present invention is not limited to the scope of the embodiments described herein.

[0032] It should be noted that in the embodiments and comparative examples, the length of the leak-proof partition is 15 cm and the width is 6 cm. The material composition is as follows: from the inside to the outside, it is 25 g / m². 2 Polypropylene skin-friendly non-woven fabric, embedded with 0.8 mm diameter polyurethane elastic yarns, 15 μm thick polyethylene breathable microporous membrane, coated with hot melt adhesive (8 g / m²). 2 It is composed of three layers. Example 1

[0033] A heat-pressing method for shaping three-dimensional leak-proof side panels of adult diapers includes the following steps: S1. The leak-proof partition is defined as the inner side from the side closest to the diaper core, and is divided into a root area with a width of 2cm, a middle area with a width of 2cm and an edge area with a width of 2cm from the inside to the outside. S2. The root area is kept at 120 ℃ with a pressure of 1 MPa for 4 s to form a continuous sawtooth groove structure with a groove depth of 2.5 mm. S3. After hot pressing, spray compressed air at 16 °C at a wind speed of 9 m / s and a distance of 25 cm to perform directional air cooling for 15 s. S4. The central area is kept at 103 °C and 0.6 MPa for 3 s to form a shallow, gently wavy groove structure with a groove depth of 1.2 mm. S5. After hot pressing, blow 26 ℃ ambient air into the middle area at a wind speed of 2 m / s and a distance of 40 cm for directional air cooling for 25 s. S6. The edge area is kept at 94 ℃ with a pressure of 0.4 MPa for 3 s to form a smooth micro-arc surface structure with a radius of curvature of 2.5 mm. S7. After hot pressing, the edge area is subjected to the same directional air cooling as in step S5 to obtain the three-dimensional leak-proof side panel of the adult diaper. Example 2

[0034] This embodiment is basically the same as embodiment 1, except that the hot pressing and shaping temperature of the root area is different. Specifically, step S2 is: the root area is held at 115 ℃ with a pressure of 1 MPa for 4 s to form a continuous sawtooth groove structure with a groove depth of 2.5 mm. Example 3

[0035] This embodiment is basically the same as embodiment 1, except that the hot pressing and shaping temperature of the root area is different. Specifically, step S2 is: the root area is held at 123 ℃ with a pressure of 1 MPa for 4 s to form a continuous sawtooth groove structure with a groove depth of 2.5 mm. Example 4

[0036] This embodiment is basically the same as embodiment 1, except that the hot pressing and shaping temperature of the middle region is different. Specifically, step S4 is: the middle region is kept at 100 ℃ with a pressure of 0.6 MPa for 3 s to form a gentle wave shallow groove structure with a groove depth of 1.2 mm. Example 5

[0037] This embodiment is basically the same as embodiment 1, except that the hot pressing and shaping temperature of the middle region is different. Specifically, step S4 is: the middle region is kept at 105 ℃ with a pressure of 0.6 MPa for 3 s to form a gentle wave shallow groove structure with a groove depth of 1.2 mm. Example 6

[0038] This embodiment is basically the same as embodiment 1, except that the hot pressing and shaping temperature of the edge area is different. Specifically, step S6 is to hold the edge area at 90 ℃ with a pressure of 0.4 MPa for 3 s to form a smooth micro-arc surface structure with a curvature radius of 2.5 mm. Example 7

[0039] This embodiment is basically the same as embodiment 1, except that the hot pressing and shaping temperature of the edge area is different. Specifically, step S6 is to hold the edge area at 97 ℃ with a pressure of 0.4 MPa for 3 s to form a smooth micro-arc surface structure with a curvature radius of 2.5 mm.

[0040] Comparative Example 1: This comparative example is basically the same as Example 1, except that it does not involve zoned hot pressing, and specifically includes the following steps: S1. Hold the entire leak-proof partition at 120 ℃ with a pressure of 1 MPa for 4 s; S2. After hot pressing, the leak-proof side panel is sprayed with compressed air at 16°C at a wind speed of 9 m / s and a distance of 25 cm for directional air cooling for 15 s to obtain the leak-proof side panel for adult diapers.

[0041] Comparative Example 2: This comparative example is basically the same as Example 1, except that: there is no root area with a continuous sawtooth groove structure, specifically, there are no steps S2 and S3, and step S1 is specifically: the leak-proof partition is defined as the inner side from the side closest to the diaper core, and is divided into a central area with a width of 3 cm and an edge area with a width of 3 cm from the inside to the outside.

[0042] Comparative Example 3: This comparative example is basically the same as Example 1, except that: there is no gentle wave shallow groove structure in the middle area, specifically, there are no steps S4 and S5, and step S1 is specifically: the leak-proof partition is defined as the inner side from the side closer to the diaper core, and is divided into a root area with a width of 3 cm and an edge area with a width of 3 cm from the inside to the outside.

[0043] Comparative Example 4: This comparative example is basically the same as Example 1, except that: there is no smooth micro-arc surface structure in the edge area. Specifically, there are no steps S6 and S7. Step S1 is as follows: the leak-proof partition is defined as the inner side from the side closest to the diaper core, and is divided into a root area with a width of 3 cm and a middle area with a width of 3 cm from the inside to the outside.

[0044] Comparative Example 5: This comparative example is basically the same as Example 1, except that the root area uses the same directional air cooling as the middle and edge areas. Specifically, step S3 involves blowing ambient air at 26°C onto the hot-pressed root area at a wind speed of 2 m / s and a distance of 40 cm for directional air cooling for 25 s.

[0045] Comparative Example 6: This comparative example is basically the same as Example 1, except that the central and edge areas use the same directional air cooling as the root area. Specifically, the hot-pressed central / edge areas are sprayed with compressed air at 16°C at a wind speed of 9 m / s and a distance of 25 cm for directional air cooling for 15 s.

[0046] Performance testing: The leak-proof partitions obtained in Examples 1-7 and Comparative Examples 1-6 were subjected to dynamic bonding and structural durability performance tests in sequence. The results are shown in Table 1.

[0047] Dynamic fit: The adult diaper with composite leak-proof side panels is installed on an adjustable bionic leg mold that simulates the contour of an adult leg (leg circumference adjustment range 30~70 cm, surface covered with 5 mm thick silicone rubber simulated skin). The leg mold is set to flex and extend at a frequency of 0.5 Hz (angle range 15°~90°). At the same time, the gap change between the side panels and the silicone rubber surface is monitored in real time by a laser displacement sensor. The maximum gap value is continuously recorded within 300 movement cycles, and the average value of 10 samples is taken as the final result.

[0048] Durable structure: Inject 0.9% sodium chloride solution into the core of the adult diaper until saturated (500 mL per diaper, injected in 5 equal portions, 5 min apart). After saturation, let stand for 30 min. Use a 3D profilometer to measure the three-dimensional height of the sidewalls (measurement points are the midpoint of the root area, the middle area, the edge area, and the two end points, a total of 5 points). Calculate the percentage of the height at each point relative to the initial height, and take the average value as the three-dimensional height retention rate after the core is saturated.

[0049] Table 1: Test results of leak-proof sidewall performance of Examples 1-7 and Comparative Examples 1-6

[0050] As shown in Table 1: A comparison of Examples 1-7 with Comparative Example 1 reveals that: Comparative Example 1 employs traditional uniform hot pressing without differentiated regional treatment, resulting in rigidity across the entire leak-proof edge. The molecular chains are uniformly and densely arranged, losing regional elasticity. In dynamic flexion-extension tests, it cannot adapt to changes in leg curvature, with a maximum gap value of 3.44 mm. Simultaneously, uniform hot pressing causes uneven stress distribution within the material, resulting in a core saturation and a three-dimensional height retention rate of only 68.97%. This invention employs a three-zone heterogeneous hot pressing process. The root zone, heated to 115-123°C and 0.8-1.2 MPa, forms a continuous sawtooth groove. Utilizing a steep geometric locking effect, a rigid anchor point is created in the high-stress area at the leg root, resisting the expansion thrust and pulling force of the core. The middle zone, heated to 100-105°C and 0.5-0.65 MPa, forms a gently wavy shallow groove. This low-curvature corrugated structure provides elastic expansion redundancy and absorbs shear stress during leg flexion and extension through hinge-like deformation. The edge zone, heated to 90-97°C and 0.35-0.4 MPa... The MPa low pressure forms a smooth micro-arc surface, which eliminates hard corners with a gradual curved transition, achieving a passive seal with soft contact with the skin. When the leg moves, the anchoring effect of the serrated groove prevents the overall displacement of the root, the elastic expansion and contraction of the wave shallow groove compensates for local curvature changes, and the micro-arc surface fits the skin folds to fill microscopic gaps. This allows the partition to dynamically adjust its shape according to the leg movement and fit different body curves in real time. Compared with the rigidity problem caused by traditional uniform hot pressing, it effectively reduces the gap during leg movement, thereby further reducing the risk of side leakage.

[0051] A comparison of Example 1 with Comparative Examples 2-4 reveals that: Comparative Example 2, lacking root area shaping, loses the rigid support of the continuous sawtooth groove, leading to easy collapse of the partition root during dynamic bonding, increasing the maximum gap to 2.96 mm and reducing the height retention rate to 76.32%; Comparative Example 3 omits the gently wavy shallow groove structure in the middle area, causing the partition to lose its elastic transition layer, making it unable to buffer stress through the flexible hinge during dynamic bending and stretching, resulting in a maximum gap of 2.78 mm and a height retention rate of 81.54%; Comparative Example 4 lacks the smooth micro-arc surface treatment in the edge area, resulting in excessively rigid edge material, easily causing wrinkles and gaps when bonded to the skin, with a maximum gap of 2.65 mm and a height retention rate of 84.71%; thus, the gradient structure of rigid support, elastic transition, and flexible bonding is destroyed, leading to a decrease in performance.

[0052] A comparison of Example 1 with Comparative Examples 5-6 reveals that: Comparative Example 5 changed the directional air cooling of the root region to the same mild cooling as the middle region, which caused the molecular chains in the root region to fail to lock their orientation quickly after high-temperature shaping, resulting in thermal relaxation. The maximum gap increased to 2.31 mm, and the height retention rate decreased to 87.26%. Comparative Example 6 changed the cooling method of the middle and edge regions to forced directional air cooling of the root region, which caused the molecular chains in the middle and edge regions to be over-locked, the internal stress could not be released slowly, and the elastic recovery ability was lost. The maximum gap was 2.48 mm, and the height retention rate was 85.39%. This disrupted the synergistic mechanism of zoned cooling, resulting in a decrease in the stability of molecular chain orientation or elastic recovery ability, ultimately affecting dynamic bonding and structural durability.

[0053] like Figure 2-5 As shown, the present invention provides a shaping device for a heat-pressing shaping method of three-dimensional leak-proof partitions for adult diapers, comprising: a device body 2, a placement and clamping mechanism disposed on the top of the device body 2 for placing and clamping the diaper, and several linear guide rails 3 installed on the top of the device body 2 for driving the placement and clamping mechanism to translate in the working position; a top plate 5 is fixed to the top of the device body 2 by several support rods 4, and a root shaping mechanism, a middle shaping mechanism, and an edge shaping mechanism are sequentially installed on the top plate 5 along the diaper traveling direction; an air-cooling component 6 for directional air cooling of the leak-proof partitions of the diaper is installed on the side of the root shaping mechanism, the middle shaping mechanism, and the edge shaping mechanism facing the diaper traveling direction; The root shaping mechanism, the middle shaping mechanism, and the edge shaping mechanism all include: a pressure block 7 set at the bottom of the top plate 5, a mold support 71 fixed at the bottom of the pressure block 7 on the top of the equipment body 2, and several heating strips 72 fixed at the bottom of the pressure block 7; a shaping upper mold 73 is fixed at the bottom of the heating strips 72, a shaping lower mold 74 is fixed at the top of the mold support 71, and a power component for driving the pressure block 7 to apply shaping pressure is installed on the top plate 5; the cross-sectional structure of the shaping upper mold 73 and the shaping lower mold 74 in the root shaping mechanism is a continuous sawtooth groove, the cross-sectional structure in the middle shaping mechanism is a gentle wave shallow groove, and the cross-sectional structure in the edge shaping mechanism is a smooth micro-arc surface.

[0054] It should be noted that the linear guide rails 3 are preferably two in number and symmetrically distributed on both sides of the mold support 71; the heating strip 72 is heated by either heat conduction or heat radiation, the outer shell of the heating strip 72 is made of a material with a high conductivity, the heating strip 72 in the root shaping mechanism has a higher power than the heating strip 72 in the middle shaping mechanism and the edge shaping mechanism, and the power of a single strip is 300~500 W; the heating strip 72, the upper shaping mold 73 and the lower shaping mold 74 are preferably two in number and symmetrically distributed, and are used to correspond to the leak-proof partitions on both sides of the diaper respectively.

[0055] Specifically, the device body 2 is driven by the linear guide rail 3 to move the placement and clamping mechanism, so that the diaper passes through the root, middle and edge shaping mechanisms in sequence. The upper shaping mold 73 of each mechanism is pushed by the power component to close with the lower shaping mold 74. The heating strip 72 performs zoned hot pressing on the partition material, and at the same time, it cooperates with the subsequent air cooling component 6 to complete gradient cooling. In this way, through the three-zone irregular mold and step-by-step hot pressing, the functional gradient distribution of rigid support, elastic transition and flexible fit of the leak-proof partition from the root to the edge can be achieved, thereby solving the problem of rigidity throughout the entire area caused by traditional uniform hot pressing, so that the partition can adapt to the dynamic changes of leg circumference after wearing and eliminate gaps.

[0056] Optionally, in order to achieve the effect of translational retrieval of the driving placement clamping mechanism of the linear guide rail 3 in the working position, a power structure can be set between the translation frame 8 and the linear guide rail 3 or between the translation frame 8 and the equipment body 2. The power structure includes at least: a power source located on the translation frame 8, and a transmission component located between the translation frame 8 and the linear guide rail 3 or between the translation frame 8 and the equipment body 2. The power source has a specific structure that can output rotational motion (such as a servo motor) in the prior art, and the transmission component has a specific structure that can transmit rotational motion and convert it into linear motion (such as a gear and rack) in the prior art. Both are common knowledge in the field, so this application will not explain the control method and structure in detail, and will not elaborate on them here.

[0057] It is understood that the shaping equipment can achieve fully automated operation of the linkage of various components and the anti-leakage edge hot pressing shaping through the control system. The control method of the control system is automatic control through a programmable controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Therefore, this application document will not explain the control method, modules and circuit connections in detail, and will not elaborate on them here.

[0058] like Figure 6 As shown, in some embodiments, the clamping mechanism includes: at least two sets of translation frames 8; each set of translation frames 8 includes: a plurality of sliders 81 slidably connected to the top of the linear guide rail 3, a plurality of fixing blocks 82 fixed to the top of the plurality of sliders 81, and a connecting plate 83 fixed between the plurality of fixing blocks 82; an electric telescopic rod 84 is installed on one side of the fixing block 82; a pressure strip 85 is installed between the output end of the electric telescopic rod 84 and the output end of the electric telescopic rod 84 in the adjacent translation frame 8 for clamping the front waist area or the back waist area of ​​the diaper.

[0059] It should be noted that the number of translation frames 8 is preferably two. The two translation frames 8 are controlled synchronously by electronic gears through PLC to ensure that the hot pressing positions of the left and right sides are kept highly symmetrical. The top surface of the fixing block 82 is at least 20 mm higher than the horizontal plane of the shaping lower mold 74 to ensure that there is no risk of collision during translation and to avoid interference between the two movements when retrieving. The bottom of the pressure strip 85 is fixed with a rubber strip to prevent slipping and to avoid damage that may be caused by the rigid clamping of the diaper. The electric telescopic rod 84 has a built-in pressure sensor to dynamically adjust the clamping force (range 0.5~3N) to prevent the material in the waist area of ​​the diaper from being crushed.

[0060] Specifically, the clamping mechanism is slidably connected to the linear guide rail 3 via the slider 81. When the electric telescopic rod 84 retracts, it drives the pressure strip 85 to clamp the front / back waist area of ​​the diaper downwards. The rubber strip contacts to avoid damaging the material. The top surface of the fixing block 82 is higher than the shaping lower mold 74 to prevent interference. The double translation frame 8 coordinates to control the diaper's travel trajectory, so that the leak-proof partitions on both sides are accurately aligned with the three sets of shaping molds. The flexible clamping ensures that the diaper is wrinkle-free and deformed during transportation, and prevents the elastic material in the waist area from relaxing due to mechanical stress. This ensures that the product is not pre-deformed when it enters the hot pressing station, providing a precision basis for zoned hot pressing and avoiding shaping misalignment caused by slippage.

[0061] like Figure 7 As shown, in some embodiments, the air-cooled assembly 6 includes: an inverted T-shaped tube 61 installed at the bottom of the top plate 5, a diversion tube 62 fixed at both ends of the bottom of the inverted T-shaped tube 61, and a plurality of air outlets 63 fixed at the bottom of the diversion tube 62 for blowing air toward the root area, middle area or edge area of ​​the leak-proof partition; a plurality of connecting rods 64 are fixed at the bottom of the top plate 5, and the bottom of the plurality of connecting rods 64 is fixed to the side of the inverted T-shaped tube 61. An inverted T-shaped tube 61 is mounted at the top of the upper surface of the top plate 5 with an air supply head 65 for connecting to an external air supply device; an external air supply device located on the side of the root shaping mechanism is used to supply compressed air at 15~18 ℃ to the air supply head 65; an external air supply device located on the side of the middle shaping mechanism and the edge shaping mechanism is used to supply ambient air at 24~30 ℃ to the air supply head 65.

[0062] It should be noted that several air outlets 63 are evenly distributed in a linear array at the bottom of the diversion pipe 62. The distance between the bottom of the air outlet 63 located on the root shaping mechanism side and the leak-proof partition is 20~30 cm, and the distance between the bottom of the air outlet 63 located on the middle and edge shaping mechanisms side and the leak-proof partition is 40~50 cm.

[0063] Specifically, the external gas supply equipment delivers compressed air at 15~18℃ or ambient air at 24~30℃ to the gas supply head 65. The gas is then split through the inverted T-shaped pipe 61 and further split through the splitting pipe 62. The gas is then blown by several air outlets 63 to the root, middle, or edge areas of the leak-proof partition to achieve shaping and cooling after hot pressing. Directional air cooling enables the molecular chains in the root area of ​​the leak-proof partition to lock quickly, avoiding shaping failure caused by thermal relaxation. Gradient air velocity reduces stress concentration in the middle area of ​​the leak-proof partition, and soft air cooling in the edge area maintains the flexibility of the material, thereby improving the structural retention effect after hot pressing.

[0064] For example, the air supply equipment connected to the root shaping mechanism can be a combination of a screw air compressor, a refrigerated dryer and a filtration system. Specifically, the air is compressed by the screw air compressor, dehydrated by the refrigerated dryer and purified by multi-stage filtration, and then the temperature is adjusted to 15~18 ℃ by the electric heating module to achieve the delivery of compressed air at 15~18 ℃. The air supply equipment connected to the middle and edge shaping mechanism can be a combination of a blower, a high-efficiency filter and an airflow pressure stabilization system. Specifically, the blower draws in ambient air, removes impurities through primary and secondary filters, and after being stabilized in the static pressure box, the temperature is adjusted to 24~30 ℃ by the temperature compensation module to achieve the supply of ambient air at 24~30 ℃.

[0065] like Figure 8 As shown, in some embodiments, the power assembly includes: a hydraulic cylinder 9 mounted on the top of the top plate 5, and a translation plate 91 fixed to the output end of the hydraulic rod at the bottom of the top plate 5; the two sides of the translation plate 91 are slidably connected to the sides of the support rod 4 through sleeves, and the bottom of the translation plate 91 is fixed to the top of the pressure block 7.

[0066] It should be noted that the hydraulic cylinder 9 is controlled by an external hydraulic control system. The hydraulic control system is based on an electric motor, uses a hydraulic pump to convert mechanical energy into pressure, drives hydraulic oil, controls various valves to change the flow direction of hydraulic oil, thereby driving the hydraulic cylinder 9 to make different strokes and different directions of movement. The specific structure is a general standard part or a component known to those skilled in the art, and will not be described in detail here.

[0067] Specifically, the power unit drives the translation plate 91 to rise and fall vertically along the support rod 4 via the hydraulic cylinder 9, which in turn drives the pressure block 7 at the bottom of the translation plate 91 and the upper mold 73 to press down. The hydraulic control system adjusts the pressure and stroke according to preset parameters, so that the upper mold 73 can be pressed precisely with the set pressure, thereby achieving differentiated hot pressing of the leak-proof partition.

[0068] The above description is based on the preferred embodiments of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description, and all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0069] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat-pressing method for shaping three-dimensional leak-proof side panels of adult diapers, characterized in that, Includes the following steps: S1. The leak-proof partition is defined as the inner side from the side closest to the diaper core, and is divided into the root area, the middle area and the edge area from the inside to the outside. S2. Maintain the root zone at 115~123 ℃ and a pressure of 0.8~1.2 MPa for 3~6 s; S3. Maintain the central region at 100~105 ℃ and a pressure of 0.5~0.65MPa for 2~4 s; S4. Hold the edge area at 90~97 ℃ with a pressure of 0.35~0.4 MPa for 2~3 s; S5. After hot pressing, the root area is subjected to directional air cooling for 12-20 seconds at a wind speed of 8-10 m / s and a distance of 20-30 cm. S6. After hot pressing, the central and edge areas are subjected to directional air cooling at a wind speed of 1~3 m / s and a distance of 40~50 cm for 22~28 s to obtain the three-dimensional leak-proof side panels of adult diapers.

2. The heat-pressing and shaping method for a three-dimensional leak-proof side panel of an adult diaper according to claim 1, characterized in that: The root region is formed by hot pressing using an upper mold and a lower mold with a continuous serrated groove structure having a groove depth of 1.6~3.5 mm.

3. The heat-pressing and shaping method for a three-dimensional leak-proof side panel of an adult diaper according to claim 1, characterized in that: The central area is formed by hot pressing using an upper mold and a lower mold with a shallow, gently wavy groove structure having a groove depth of 0.8 to 2 mm.

4. The heat-pressing and shaping method for a three-dimensional leak-proof side panel of an adult diaper according to claim 1, characterized in that: The edge area is formed by hot pressing using a shaping upper mold and a shaping lower mold with a smooth micro-arc surface structure having a curvature radius of 1.7~4 mm.

5. The heat-pressing and shaping method for a three-dimensional leak-proof side panel of an adult diaper according to claim 1, characterized in that: In step S5, the cooling medium for the directional air cooling of the root region is compressed air at 15-18°C.

6. The heat-pressing and shaping method for a three-dimensional leak-proof side panel of an adult diaper according to claim 1, characterized in that: In step S6, the cooling medium for directional air cooling in the central and edge regions is ambient air at 24-30°C.

7. A shaping device for a heat-pressing shaping method for three-dimensional leak-proof side panels of adult diapers according to any one of claims 1-6, characterized in that, include: The device body includes a placement and clamping mechanism located on the top of the device body for placing and clamping diapers, and several linear guide rails installed on the top of the device body for driving the placement and clamping mechanism to translate in the working position. The top of the device body is fixed with a top plate by several support rods. The top plate is sequentially equipped with a root shaping mechanism, a middle shaping mechanism and an edge shaping mechanism along the direction of diaper travel. Each of the root shaping mechanism, the middle shaping mechanism and the edge shaping mechanism is equipped with an air-cooling component for directional air cooling of the diaper's leak-proof sidewalls on the side facing the direction of diaper travel. The root shaping mechanism, the middle shaping mechanism, and the edge shaping mechanism each include: a pressure block disposed at the bottom of the top plate, a mold support fixed at the bottom of the pressure block on the top of the equipment body, and a plurality of heating strips fixed at the bottom of the pressure block; an upper shaping mold is fixed at the bottom of the heating strips, a lower shaping mold is fixed at the top of the mold support, and a power assembly for driving the pressure block to apply shaping pressure is installed on the top plate; The upper and lower shaping molds have a continuous sawtooth groove in the root shaping mechanism, a gentle wave shallow groove in the middle shaping mechanism, and a smooth micro-arc surface in the edge shaping mechanism.

8. The shaping equipment for the heat-pressing shaping method of the three-dimensional leak-proof side panel of adult diapers according to claim 7, characterized in that: The placement and clamping mechanism includes: at least two sets of translation frames; each set of translation frames includes: a plurality of sliders slidably connected to the top of the linear guide rail, a plurality of fixing blocks fixed to the top of the plurality of sliders, and a connecting plate fixed between the plurality of fixing blocks; an electric telescopic rod is installed on one side of the fixing blocks; A pressure strip is installed between the output end of the electric telescopic rod and the output end of the electric telescopic rod in the adjacent translation frame, for clamping the front or back waist area of ​​the diaper.

9. The shaping equipment for the heat-pressing shaping method of the three-dimensional leak-proof side panel of an adult diaper according to claim 7, characterized in that: The air-cooled assembly includes: an inverted T-shaped tube installed at the bottom of the top plate, a distribution pipe fixed at both ends of the bottom of the inverted T-shaped tube, and a plurality of air outlets fixed at the bottom of the distribution pipes for blowing air toward the root area, middle area, or edge area of ​​the leak-proof partition; a plurality of connecting rods are fixed at the bottom of the top plate, and the bottom of the plurality of connecting rods is fixed to the side of the inverted T-shaped tube. The inverted T-shaped tube is equipped with an air supply head for connecting to an external air supply device at the top of the upper surface of the top plate; the air supply device connected to the root shaping mechanism is used to supply compressed air at 15~18 ℃ to the air supply head; the air supply device connected to the middle shaping mechanism and the edge shaping mechanism is used to supply ambient air at 24~30 ℃ to the air supply head.

10. The shaping equipment for the heat-pressing shaping method of the three-dimensional leak-proof side panel of an adult diaper according to claim 7, characterized in that: The power assembly includes: a hydraulic cylinder mounted on the top of the top plate, and a translation plate fixed to the output end of the hydraulic rod at the bottom of the top plate; the two sides of the translation plate are slidably connected to the sides of the support rod through sleeves, and the bottom of the translation plate is fixed to the top of the pressure block.

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