Composite device and composite process for non-glue and non-wrinkle urinal pad

Abstract

The invention discloses a compounding device and a compounding process for a non-adhesive and non-wrinkle urinal pad. The compounding device comprises a fixed plate, a sliding plate, a hot melting compounding mechanism and a dynamic extension assembly. The hot melting composite mechanism drives a gap between an insertion cylinder and a sleeve roller to be adjusted (0.1-0.5 mm) through a conical spring, and the temperature is accurately controlled (+ / -2 DEG C) by combining with an electric heating wire, so that glue-free fusion of materials is realized; the dynamic extension assembly drives the elastic stretching belt to periodically stretch the material along the arc-shaped guide groove through the center roller, the protruding structures are meshed with the surface, and the stretching amplitude is 1%-3% of the width of the material. The manufacturing process comprises the following steps: pre-stretching (the frequency is calculated according to f = v / L), hot melting compounding (the pressure is adjusted according to P = 0.8 T + 0.2), and cooling and shaping. According to the scheme, chemical adhesives are abandoned, VOCs emission is zero, the tensile strength of a fusion interface is improved by 37%-48%, the wrinkle elimination rate exceeds 95%, the adaptive production line speed is 1.2 m / s, the productivity reaches 7200 pieces per hour, and the advantages of environmental friendliness, high efficiency and product quality are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of diaper composite technology, and particularly to a composite device and a composite process for a glue-free and wrinkle-free diaper. Background Art

[0003] As a disposable sanitary product, the core of the manufacturing process of diapers lies in achieving efficient composite of material layers and controlling the surface flatness. Traditional diaper composite technology generally relies on chemical adhesives to achieve the bonding of fiber layers. Although this method can ensure a certain bonding strength, it has significant defects:

[0004] Environmental protection and health hazards: The adhesive may contain volatile organic compounds (VOCs), long-term exposure to which may cause allergic reactions, and the adhesive residue of discarded diapers will increase the environmental burden;

[0005] Deterioration of material properties: The curing process of the adhesive may cause the surface layer of the diaper to harden, reducing softness and breathability and affecting the use comfort;

[0006] Insufficient wrinkle control: Diaper materials are mostly thin and flexible fibers. In traditional composite processes, mechanical pressure rollers or tension control systems are difficult to evenly eliminate material wrinkles. Especially during high-speed production, local stress concentration is easily caused by uneven stretching, forming secondary wrinkles.

[0007] In response to the above problems, existing technologies have tried to alleviate the defects by improving the pressing device or introducing a pre-stretching step, but there are still limitations:

[0008] Hot melt pressing technology: Some solutions use hot air or heating wires to heat for glue-free bonding, but the temperature control accuracy is insufficient (usually above ±5°C), which easily leads to an overly brittle fusion interface or weak bonding;

[0009] Wrinkle elimination means: Mechanical pre-stretching devices mostly rely on rigid rollers or complex sensors to adjust the tension. Such designs have poor adaptability to the ductility of materials and are difficult to achieve precise control of a small stretching amplitude (such as 1%-3% of the material width), resulting in over-stretching or wrinkle rebound.

[0010] Therefore, there is an urgent need for an innovative technical solution that can achieve high-strength fusion of diaper materials under glue-free conditions, and at the same time accurately eliminate wrinkles through a dynamic and flexible stretching mechanism, taking into account environmental protection, comfort and production efficiency. Summary of the Invention

[0012] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a composite device and a composite process for a glue-free and wrinkle-free diaper.

[0013] To achieve the above object, the present invention provides a composite device for a glue-free and wrinkle-free urine pad, and its innovation lies in: its structure includes:

[0014] A fixed plate and a sliding plate, the sliding plate is slidably connected to the fixed plate through a horizontal rail to form an adaptive clamping area;

[0015] A hot melt composite mechanism, including a motor, a sleeve roller and an insertion cylinder, the insertion cylinder is internally provided with a heating wire, and the insertion cylinder is driven by a conical spring to extend into the inner cavity of the sleeve roller to achieve glue-free hot melt pressing;

[0016] A dynamic extension component, including a fixed bracket, a center roller, an elastic stretching belt and a return spring, the elastic stretching belt periodically stretches the material to eliminate wrinkles;

[0017] Among them, the hot melt composite mechanism and the dynamic extension component cooperate with each other. During the hot melt pressing process, the elastic stretching belt continuously applies a lateral pulling force to keep the material in a stretched state, and the stretching amplitude is 1%-3% of the width of the material.

[0018] Further, the above-mentioned motor is fixedly connected to the inner side of the fixed plate, the outer side of its output end is fixedly connected to the sleeve roller, the end face of the output end is fixedly connected to a sleeve, and one end of the sleeve away from the motor is fixedly connected to a conical spring;

[0019] One end of the sleeve roller away from the motor is inserted with an insertion cylinder, and one end of the insertion cylinder away from the sleeve roller is rotatably connected to the inner side of the sliding plate;

[0020] One end of the insertion cylinder away from the sliding plate is provided with a chute, a blocking slider is fixedly connected inside the chute, a slide bar is slidably fitted inside the chute, the outer side of the slide bar is fixedly connected to the conical spring, and the slide bar and the chute are matched by a dovetail groove structure to limit the radial displacement of the slide bar.

[0021] Further, the gap between the above-mentioned insertion cylinder and the sleeve roller is adjustable, and the adjustment range is 0.1-0.5 mm, and the temperature control accuracy of the heating wire is ±2 °C, and the working temperature is 150-220 °C;

[0022] The coordinated action of the gap adjustment and the temperature control satisfies the following relationship: when the gap is reduced to 0.1 mm, the temperature of the heating wire is set to 220 °C, and when the gap is increased to 0.5 mm, the temperature is adjusted to 150 °C to achieve the uniformity of the fusion interface strength.

[0023] Further, the above-mentioned fixed bracket is arranged outside the clamping area, the center roller is rotatably arranged on the fixed bracket, and its rotation is controlled by an independent motor, and the rotation speed range is 10-50 revolutions per minute;

[0024] The side of the fixed bracket is provided with an L-shaped bracket, the long side of the L-shaped bracket is horizontally fixed on the side of the fixed bracket, the short side is vertically located obliquely above the center of the center roller, and the bottom of the short side is provided with a fixed fulcrum;

[0025] One end of the elastic stretching belt is fixed on the surface of the central roller, and the other end is connected to a fixed fulcrum through a return spring. A shock-absorbing gasket is provided at the connection between the fixed fulcrum and the L-shaped bracket. The compression ratio of the shock-absorbing gasket is 30%-50% to reduce the vibration amplitude when the return spring rebounds.

[0026] Furthermore, the above-mentioned elastic stretching belt is made of silica gel or polyurethane, and its tensile strength matches the elastic coefficient of the return spring. The stretching frequency is 10-30 times per minute;

[0027] An arc-shaped guide groove is provided on the surface of the central roller. The transverse length of the arc-shaped guide groove is greater than or equal to the width of the material. The width of the arc-shaped guide groove is greater than the thickness of the elastic stretching belt, and the depth is 2-5 mm. Moreover, the cross-section of the arc-shaped guide groove is trapezoidal. When the elastic stretching belt slides into the arc-shaped guide groove, its two sides contact the inclined surface of the arc-shaped guide groove to prevent it from coming out.

[0028] Furthermore, raised structures are evenly distributed on the surface of the above-mentioned elastic stretching belt, with a density of 5-10 per square centimeter. The raised structures are 1-3 mm higher than the surface of the arc-shaped guide groove;

[0029] When the material passes through the central roller, the raised structures bite the surface of the material, applying a transverse tensile force along the path of the arc-shaped guide groove. The stretching amplitude is 1%-3% of the width of the material, and the stretching amplitude is verified by the following formula:

[0030] , where the single stretching length is 0.1-0.3 m and the material conveying speed is 0.5-1.2 m / s.

[0031] The present invention provides a composite process for the above-mentioned composite device, which specifically includes the following steps:

[0032] Step 1: Pre-stretch the material. The material is periodically stretched along the arc-shaped guide groove through the elastic stretching belt, and the stretching amplitude is 1%-3% of the width of the material to eliminate the initial wrinkles;

[0033] Step 2: Hot melt composite. Start the motor to drive the sleeve roller and the insertion cylinder to rotate, heat the heating wire to 150-220 °C, and fuse the surface fibers of the material under a pressure of 0.5-1.5 MPa;

[0034] Step 3: Cooling and shaping. The composite material is quickly cooled to below 40 °C to form a glue-free interface;

[0035] Among them, Step 1 and Step 2 are carried out synchronously, and the elastic stretching belt continuously applies a transverse tensile force during the hot melt process.

[0036] Furthermore, in Step 1, the ratio of the rotation speed of the central roller to the material conveying speed is 1:1 to 1:1.2, and the stretching frequency is calculated by the formula Calculated, where The single - stretch length ranges from 0.1 to 0.3 m, and the relationship between the ratio and the stretching amplitude satisfies: when the ratio is equal to 1:1, the stretching amplitude is 1%; when the ratio = 1:1.2, the stretching amplitude is 3%.

[0037] Further, in step two, the hot - melt composite pressure is dynamically adjusted according to the material thickness, and the adjustment formula is: , where, is the pressure, with the unit of Mpa, is the material thickness, with the unit of mm, and when <0.5 mm, the lower limit of the pressure is 0.5 MPa; when >2 mm, the upper limit of the pressure is 1.8 MPa:

[0038] The beneficial effects of the present invention are:

[0039] 1. Improvement in environmental protection and health safety:

[0040] Glue - free hot - melt technology: The electric heating wire is used to directly fuse the material fibers, completely abandoning chemical adhesives. The VOCs emission is 0 mg / m³ (≥50 mg / m³ for traditional processes), avoiding the risk of allergies and environmental pollution.

[0041] Material compatibility: It is applicable to various environmentally friendly materials such as PE / PP fibers and non - woven fabrics, meeting the standards of medical - grade sanitary products.

[0042] 2. Optimization of material properties and product quality:

[0043] Enhancement of the fusion interface strength: Through the synergistic effect of gap adjustment (0.1 - 0.5 mm) and temperature control (±2℃ accuracy), the tensile strength of the fusion interface reaches 8.5 - 9.2 MPa, which is 37% - 48% higher than that of the traditional adhesive process (6.2 MPa).

[0044] Improvement of surface flatness: The periodic stretching (amplitude 1% - 3%) of the dynamic extension component eliminates wrinkles, and the surface roughness Ra of the material is ≤0.8 μm, which is 47% lower than that of the traditional process (Ra≥1.5 μm).

[0045] 3. Enhancement of production efficiency and stability:

[0046] Adaptability to high - speed production: The central roller is driven by an independent motor (rotation speed 10 - 50 revolutions per minute), combined with shock - absorbing gaskets (vibration amplitude reduced by 90%), supporting a production line speed of 1.2 m / s and an hourly output of 7200 pieces, which is 44% higher than that of the traditional process.

[0047] Precise parameter control: Through formulaic adjustments (such as stretching frequency f = v / L, pressure P = 0.8T + 0.2), the dynamic adaptation of process parameters is achieved, and the scrap rate is reduced from 8% of the traditional process to 2%.

[0048] 4. Reliability brought by structural innovation:

[0049] Anti-offset design: The dovetail groove structure of the chute and the slide bar matches to ensure the positioning accuracy of the heating wire (offset < 0.05mm);

[0050] Anti-disengagement constraint: The trapezoidal cross-section design of the arc-shaped guide groove enables the elastic stretching belt to have zero disengagement during sliding, and the stretching direction error < 1°.

[0051] 5. Wide applicability and scalability:

[0052] Wide coverage of material thickness: It supports the compounding of urine pad materials with a thickness of 0.2 - 2mm. The pressure formula (P = 0.8T + 0.2) automatically adapts to different thicknesses to avoid overpressure or insufficient pressure;

[0053] Process portability: This solution can be extended to the glue-free compound production of flexible materials such as sanitary napkins and medical dressings. Brief description of the drawings

[0055] Figure 1 It is a schematic diagram of the structure between the fixed plate and the sliding plate of the present invention.

[0056] Figure 2 It is a detailed structure diagram of the hot melt compounding mechanism of the present invention.

[0057] Figure 3 It is a structure diagram of the dynamic extension component of the present invention, where the arrow is the conveying direction of the material, and the dotted line is the center position of the center roller.

[0058] Figure 4 It is a front sectional view of the arc-shaped guide groove of the present invention on the center roller.

[0059] Figure 5 It is a flow chart of the compounding process of the present invention. Detailed implementation manners

[0061] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0062] Such as Figures 1 to 4As shown in the figure, the present invention provides a glue - free hot - melt composite device, including:

[0063] Fixed plate 1 and sliding plate 4: They are slidably connected through the cross - rail 3 to form an adaptive clamping area, which can automatically adjust the clamping gap according to the width of the material 100 to ensure the stable conveyance of the material 100.

[0064] Hot - melt composite mechanism 2: Driven by the motor 241, the sleeve roller 242 and the insertion cylinder 245 are used to heat and fuse the surface fibers of the material 100 by the electric heating wire 246 to achieve glue - free bonding.

[0065] Dynamic stretching component 23: Through the coordinated action of the central roller 2312, the elastic stretching belt 2313 and the return spring 2314, the material 100 is periodically stretched to eliminate wrinkles.

[0066] Technical advantages:

[0067] 1. Glue - free hot - melt: The material 100 is directly fused by the electric heating wire 246, avoiding the use of chemical adhesives.

[0068] 2. Dynamic wrinkle elimination: The elastic stretching belt 2313 continuously applies a lateral pulling force during the hot - melt process (the stretching amplitude is 1% - 3% of the width of the material 100) to ensure the flatness of the material 100.

[0069] In the present invention, the specific structure of the hot - melt composite mechanism 2:

[0070] Drive connection: The output end of the motor 241 is respectively connected to the sleeve roller 242 and the sleeve 243. The sleeve 243 drives the insertion cylinder 245 to extend into the inner cavity of the sleeve roller 242 through the conical spring 244.

[0071] Positioning mechanism: The slide bar 248 and the slide groove 247 are matched with a dovetail groove structure to limit the radial displacement of the slide bar and ensure the accurate positioning of the insertion cylinder 245.

[0072] Technical advantages:

[0073] The compression and torsion of the conical spring 244 provide a stable driving force, and the cooperation between the anti - slide block 249 and the slide bar 248 prevents the electric heating wire 246 from shifting.

[0074] In the present invention, the parameters of the hot - melt composite mechanism:

[0075] Clearance adjustment: The clearance between the insertion cylinder 245 and the sleeve roller 242 is 0.1 - 0.5 mm. The smaller the clearance, the higher the heat conduction efficiency.

[0076] Temperature control: The temperature control accuracy of the electric heating wire 246 is ±2℃, and the working temperature is 150 - 220℃. The clearance and temperature are adjusted in coordination (for example, a clearance of 0.1 mm corresponds to a high temperature of 220℃).

[0077] Technical advantages:

[0078] By dynamically matching the gap and temperature, the strength of the fusion interface is ensured to be uniform, avoiding over-melting or poor bonding of the material 100.

[0079] In the present invention, the structure of the dynamic extension component 23:

[0080] Driving method: The central roller 2312 is driven by an independent motor, with a rotational speed of 10 - 50 revolutions per minute, avoiding the instability relying on friction.

[0081] Shock absorption design: A shock absorption gasket 9 is provided at the connection between the fixed fulcrum 7 and the L-shaped bracket 8, with a compression ratio of 30% - 50%, reducing the rebound vibration of the return spring 2314.

[0082] Technical advantages:

[0083] The independent motor drive ensures that the stretching frequency is controllable, and the shock absorption gasket 9 improves the stability of the equipment, suitable for high-speed production.

[0084] In the present invention, the matching design between the central roller 2312 and the elastic stretching belt 2313:

[0085] Arc-shaped guide groove 2312a: The cross-section is trapezoidal, with a depth of 2 - 5 mm and a width greater than the thickness of the elastic stretching belt 2313, preventing the stretching belt from slipping out.

[0086] Characteristics of the material 100: The elastic stretching belt 2313 is made of silicone or polyurethane, and the tensile strength matches the elastic coefficient of the return spring 2314.

[0087] Technical advantages: The inclined surface contact design of the trapezoidal arc-shaped guide groove provides constraints on the movement trajectory, ensuring the accuracy of the stretching direction.

[0088] In the present invention, the raised structure 2313a of the elastic stretching belt 2313 is defined:

[0089] Raised structure 2313a: The density is 5 - 10 per square centimeter, and it is 1 - 3 mm higher than the surface of the arc-shaped guide groove, biting the surface of the material 100 to apply a lateral tensile force.

[0090] Tensile amplitude formula: Through the formula Verify the tensile amplitude (1% - 3%).

[0091] Technical advantages:

[0092] The raised structure enhances the biting force of the material 100, and the formulaic parameters ensure the accuracy and controllability of the tensile amplitude.

[0093] As Figure 5 shown, the present invention provides a composite process,

[0094] Step 1 (Pre-stretching): The elastic stretching belt 2313 periodically stretches the material 100 along the arc-shaped guide groove 2312a to eliminate the initial wrinkles.

[0095] Step 2 (Hot melting): The heating wire 246 is heated to 150 - 220 °C, and the sleeve roller 242 fuses the material (100) under a pressure of 0.5 - 1.5 MPa.

[0096] Step 3 (Cooling): Rapidly cool to below 40 °C to form a glue-free interface.

[0097] Synergistic effect:

[0098] The pre-stretching and hot melting are carried out synchronously, and the tensile force continuously acts on the fusion interface to improve the bonding uniformity.

[0099] In the present invention, the pre-stretching parameters:

[0100] Speed ratio: The ratio of the rotation speed of the central roller 2312 to the conveying speed of the material 100 is 1:1 to 1:1.2.

[0101] Formulated control: Tensile frequency , where is the single tensile length, with a range of 0.1 - 0.3 m, and the relationship between the ratio and the tensile amplitude satisfies: when the ratio is equal to 1:1, the tensile amplitude is 1%; when the ratio = 1:1.2, the tensile amplitude is 3%

[0102] Technical advantages:

[0103] Through the matching of the speed ratio and the formula, the dynamic adjustment of the tensile amplitude is realized.

[0104] In the present invention, the hot melting pressure adjustment formula: , where, is the pressure, with the unit of Mpa, is the thickness of the material 100, with the unit of mm, and when < 0.5 mm, the lower limit of the pressure is 0.5 MPa; when > 2 mm, the upper limit of the pressure is 1.8 MPa.

[0105] Technical advantages: The formulated pressure adjustment adapts to different thicknesses of the material 100, avoiding overpressure or insufficient pressure.

[0106] Example 1: Optimization of the device structure and hot melting parameters

[0107] 1. Device structure:

[0108] Fixed plate and sliding plate:

[0109] The fixed plate 1 and the sliding plate 4 are slidably connected through the cross rail 3, and the self - adaptive adjustment range of the gap in the clamping area is 0.5 - 3 mm, which is suitable for urine pad materials 100 with different thicknesses (0.2 - 2 mm).

[0110] Experimental data: Five materials 100 with thicknesses of 0.3 mm, 0.5 mm, 1 mm, 1.5 mm, and 2 mm were tested. The time taken for the automatic adjustment of the clamping area was ≤ 0.5 seconds, and the offset of the material 100 was < 0.1 mm.

[0111] 2. Hot - melt composite mechanism:

[0112] The motor 241 drives the sleeve roller 242 and the insertion cylinder 245. The temperature of the heating wire 246 is set at 180 °C (gap 0.3 mm), and the fusion pressure is 1.0 MPa.

[0113] Linkage between the anti - slide block and the chute: When the conical spring 244 is compressed to the limit, the slide bar 248 contacts the anti - slide block 249, and the heating wire 246 is accurately positioned with an offset < 0.05 mm.

[0114] Experimental data: By comparing the fusion strengths at different gaps (0.1 mm, 0.3 mm, 0.5 mm), the results show that the interfacial tensile strength is the highest (8.5 MPa) at a gap of 0.3 mm, which is 37% higher than that of the traditional adhesive process (6.2 MPa).

[0115] 3. Dynamic extension component:

[0116] The central roller 2312 is driven by an independent motor at a speed of 30 revolutions per minute. The elastic stretching belt 2313 has a stretching frequency of 20 times per minute and a stretching amplitude of 2% (width of the material 100).

[0117] Constraint of the arc - shaped guide groove: The arc - shaped guide groove 2312a with a trapezoidal cross - section has a depth of 3 mm. After the elastic stretching belt 2313 is embedded, the two side inclined planes are in contact, and there is no record of detachment.

[0118] Experimental data: When the arc - shaped guide groove is not used, the offset rate of the stretching belt is 15%; after using the arc - shaped guide groove, the offset rate drops to 0.5%.

[0119] 3. Co - regulation of temperature and gap

[0120] When the set gap is 0.1 mm, the temperature of the heating wire is 220 °C, and the interfacial tensile strength of the fusion is 9.2 MPa;

[0121] When the gap is 0.5 mm, the temperature is 150 °C, and the tensile strength is 7.0 MPa.

[0122] Conclusion: The gap and temperature are adjusted in the opposite direction to ensure the stability of the fusion strength (± 10%) for different thicknesses of the material 100.

[0123] Example 2: Implementation of the composite process and parameter verification

[0124] Process steps:

[0125] Pre-stretching of Material 100:

[0126] The density of the surface protrusion structure 2313a on the elastic stretching belt 2313 is 8 per square centimeter, 2 mm higher than the surface of the arc-shaped guide groove, and a lateral tensile force is applied.

[0127] Tensile amplitude control: Through the formula , the actually measured tensile amplitude is 1.9% - 2.1%.

[0128] Experimental data: When the tensile amplitude is 1%, the wrinkle residue rate is 25%; when it is 2%, it drops to 5%; when it is 3%, the fracture risk of Material 100 increases to 10%.

[0129] Hot melt compounding:

[0130] When the thickness of Material 100 is 1.0 mm, the pressure is set according to the formula P = 0.8×1.0 + 0.2 = 1.0 MPa, and the temperature of the heating wire is 180°C.

[0131] Verification of the synergistic effect: Compared with the traditional process (without dynamic stretching), the uniformity of the fusion interface in this solution is improved by 40%, and there are no wrinkles in the fusion area under the tensile state.

[0132] Cooling and shaping:

[0133] The composite material (100) is cooled to 35°C by the cold air system (wind speed 10 m / s), and the surface roughness Ra of the non-adhesive interface ≤ 0.8 μm (Ra ≥ 1.5 μm for the traditional process).

[0134] Example 3: Verification of the performance of the shock-absorbing gasket:

[0135] Test conditions:

[0136] Experimental purpose

[0137] Verify the shock-absorbing effect of the shock-absorbing gasket 9 during the rebound of the return spring 2314 to ensure the stability of the dynamic extension component 23.

[0138] Experimental design

[0139] Test conditions:

[0140] Rotational speed of the central roller 2312: 30 revolutions per minute;

[0141] Elastic coefficient of the return spring 2314: 50 N / m;

[0142] Compression rate of the shock-absorbing gasket 9: 30%, 40%, 50% (three groups of controls).

[0143] Measuring parameters:

[0144] The vibration amplitude (peak displacement) when the reset spring rebounds;

[0145] The operating noise level (dB) of the equipment

[0146] Experimental results

[0147] Compression ratio of shock-absorbing gasket Vibration amplitude (mm) Noise level (dB) Shock-absorbing gasket not used 5.0 75 30% 1.2 65 40% 0.5 60 50% 0.8 62

[0148] Conclusion:

[0149] When the compression ratio is 40%, the vibration amplitude is reduced by 90% (from 5.0 mm to 0.5 mm), and the noise is reduced by 15 dB;

[0150] When the compression ratio is too high (50%), the rigidity of the gasket increases, and the shock absorption effect decreases slightly, verifying the rationality of the compression ratio of 30% - 50%.

[0151] Example 4: Comparison of environmental friendliness and production efficiency

[0152] Environmental friendliness:

[0153] The VOCs emission of the glue - free hot - melt process in this solution is 0 mg / m³, while the VOCs of the traditional adhesive process is ≥50 mg / m³.

[0154] Production efficiency:

[0155] When the production line speed is 1.2 m / s, the hourly output of this solution is 7200 pieces, while the output of the traditional process is only 5000 pieces due to the extended cooling time.

[0156] Example 5: Biting force test of the convex structure

[0157] The convex heights are 1 mm, 2 mm, and 3 mm, and the material 100 is non - woven fabric (thickness 0.5 mm).

[0158] Result: When the height is 2 mm, the biting force is 0.8 N / cm², and the stretching efficiency is increased by 50% compared with the structure without convexity.

[0159] Conclusion: The convex structure with a height of 1 - 3 mm has technical criticality.

[0160] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the internal communication of two components. It can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0161] Secondly: In the accompanying drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0162] Finally: The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A composite device of a non-glue and non-wrinkle urine pad, characterized in that: Its structure includes: A fixed plate (1) and a sliding plate (4), wherein the sliding plate (4) is slidably connected to the fixed plate (1) via a cross rail (3) to form an adaptive clamping area; A hot melt laminating mechanism (2) comprises a motor (241), a sleeve roller (242) and an insert cylinder (245); the insert cylinder (245) has a built-in electric heating wire (246), and the insert cylinder (245) is driven by a conical spring (244) to extend into the inner cavity of the sleeve roller (242), thereby achieving glue-free hot melt laminating; A dynamic stretching assembly (23), comprising a fixed support (2311), a central roller (2312), an elastic stretching belt (2313) and a return spring (2314), wherein the elastic stretching belt (2313) periodically stretches the material (100) to eliminate wrinkles; The hot-melt composite structure (2) and the dynamic stretching component (23) work together, and during the hot-melt pressing process, the elastic stretching belt (2313) continuously applies a lateral pulling force to keep the material (100) in a stretched state, and the stretching amplitude is 1%-3% of the width of the material (100).

2. A composite device of a glue-free and wrinkle-free urine pad according to claim 1, characterized in that: The motor (241) is fixedly connected to the inner side of the fixed plate (1), the outer side of the output end is fixedly connected to the sleeve roller (242), the end surface of the output end is fixedly connected to the sleeve (243), and the end of the sleeve (243) away from the motor (241) is fixedly connected to the conical spring (244); An inserting sleeve (245) is inserted into one end of the sleeve roller (242) away from the motor (241), and one end of the inserting sleeve (245) away from the sleeve roller (242) is rotatably connected to the inner side of the sliding plate (4); A slide groove (247) is provided at one end of the insert cylinder (245) away from the sliding plate (4); a resistance sliding block (249) is fixedly connected inside the slide groove (247); a slide bar (248) is slidably adapted inside the slide groove (247); the outer side of the slide bar (248) is fixedly connected to the conical spring (244); and the slide bar (248) and the slide groove (247) are matched with a dovetail groove structure to limit the radial displacement of the slide bar (248).

3. The composite device of the adhesive-free and wrinkle-free urine pad according to claim 2, characterized in that: The gap between the insert cylinder (245) and the sleeve roller (242) is adjustable within a range of 0.1-0.5 mm, and the temperature control accuracy of the heating wire (246) is ±2° C., and the operating temperature is 150-220° C.; The synergistic effect of gap adjustment and temperature control satisfies the following relationship: when the gap is reduced to 0.1 mm, the temperature of the heating wire (246) is set to 220°C, and when the gap is increased to 0.5 mm, the temperature is adjusted to 150°C to achieve uniformity of fusion interface strength.

4. The composite device of the adhesive-free and wrinkle-free urine pad according to claim 1, characterized in that: The fixed support (2311) is arranged outside the clamping area, and the central roller (2312) is rotatably arranged on the fixed support (2311), and its rotation is controlled by an independent motor, and the rotation speed range is 10-50 revolutions per minute; An L-shaped bracket (8) is provided on the side of the fixed bracket (2311), the long side of the L-shaped bracket (8) is horizontally fixed to the side of the fixed bracket (2311), the short side is vertically located obliquely above the center of the center roller (2312), and a fixed fulcrum (7) is provided at the bottom of the short side; One end of the elastic stretching belt (2313) is fixed to the surface of the central roller (2312), and the other end is connected to the fixed fulcrum (7) via a return spring (2314). A shock-absorbing gasket (9) is provided at the connection between the fixed fulcrum (7) and the L-shaped bracket (8). The compression rate of the shock-absorbing gasket (9) is 30%-50%, and is used to reduce the vibration amplitude of the return spring (2314) when it rebounds.

5. The composite device of the adhesive-free and wrinkle-free urine pad according to claim 4, characterized in that: The elastic stretching band (2313) is made of silicone or polyurethane, and its tensile strength matches the elastic coefficient of the return spring (2314), and the stretching frequency is 10-30 times / minute; The surface of the center roller (2312) is provided with an arc-shaped guide groove (2312a), the lateral length of the arc-shaped guide groove (2312a) is greater than or equal to the width of the material (100), the width of the arc-shaped guide groove (2312a) is greater than the thickness of the elastic stretch band (2313), the depth is 2-5 mm, and the cross-section of the arc-shaped guide groove (2312a) is trapezoidal. When the elastic stretch band (2313) is embedded in the arc-shaped guide groove and slides, its two sides are in contact with the inclined surface of the arc-shaped guide groove (2312a) to prevent it from falling out.

6. The composite device of the adhesive-free and wrinkle-free urine pad according to claim 5, characterized in that: The surface of the elastic stretch band (2313) is evenly distributed with protruding structures (2313a) at a density of 5-10 per square centimeter, and the protruding structures (2313a) are 1-3 mm higher than the surface of the arc-shaped guide groove (2312a); When the material (100) passes through the center roller (2312), the protruding structure (2313a) bites the surface of the material (100) and applies a transverse tensile force along the path of the arc-shaped guide groove (2312a). The stretching amplitude is 1%-3% of the width of the material (100), and the stretching amplitude is verified by the following formula: , wherein the single stretching length is 0.1-0.3 m and the material (100) conveying speed is 0.5-1.2 m / s.

7. The composite process of the composite device according to any one of claims 1 to 6, characterized in that: The specific steps include: Step 1: pre-stretching the material (100), the material (100) is periodically stretched along the arc-shaped guide groove (2312a) by an elastic stretching belt (2313), and the stretching amplitude is 1%-3% of the width of the material (100), so as to eliminate initial wrinkles; Step 2: hot melt lamination, starting the motor (241) to drive the sleeve roller (242) and the insert cylinder (245) to rotate, heating the electric heating wire (246) to 150-220° C., and fusing the surface fibers of the material (100) at a pressure of 0.5-1.5 MPa; Step 3: Cooling and shaping, the composite material (100) is rapidly cooled to below 40° C. to form a glue-free interface; Wherein, step one and step two are performed simultaneously, and the elastic stretch band (2313) continuously applies lateral tension during the hot melting process.

8. A composite process according to claim 7, characterized in that: In the step 1, the ratio of the rotation speed of the center roller (2312) to the conveying speed of the material (100) is 1:1 to 1:1.2, and the stretching frequency is calculated by the formula Calculate, where It is the single stretching length, ranging from 0.1-0.3m, and the relationship between the ratio and the stretching amplitude satisfies: when the ratio is equal to 1:1, the stretching amplitude is 1%; when the ratio = 1:1.2, the stretching amplitude is 3%.

9. A composite process according to claim 7, characterized in that: In the step 2, the hot melt lamination pressure is dynamically adjusted according to the thickness of the material (100), and the adjustment formula is: ,in, is the pressure, the unit is MPa, is the material (100) thickness in mm, and when When <0.5mm, the lower limit of pressure is 0.5MPa; when When the diameter is greater than 2mm, the upper limit of pressure is 1.8MPa.

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