Ultrasonic left and right hook-and-loop fastener manufacturing method and paper diaper

Abstract

The invention provides an ultrasonic left-right magic buckle manufacturing method which comprises the following steps: a hook surface manufacturing procedure: selecting a hook surface material, carrying out hot rolling to form a hook surface base material, rolling, and punching salient points on the hook surface base material through ultrasonic dotting equipment to form a hook surface; the ultrasonic dotting equipment comprises a base; the machine table is fixedly installed on the base, and the machine base is arranged in the center of the machine table; the ultrasonic assembly is installed on the machine base and comprises an ultrasonic generator, an energy converter connected with the ultrasonic generator, a welding head connected to the energy converter and capable of moving up and down and a welding base fixed to the machine table and located below the welding head, and a heat conduction cavity used for being filled with cold and heat media periodically is formed in the welding base; when the welding head is pressed down to the welding seat for dotting operation, the heat conduction cavity in the welding seat is filled with a heating medium, and the welding head is lifted up from the welding seat after dotting is completed. The paper diaper is compounded with the hook-and-loop fasteners manufactured through the manufacturing method.

Description

Technical Field

[0001] The invention relates to the technical field of magic tapes, and in particular to a method for manufacturing ultrasonic left-right magic tapes. Background Art

[0002] Velcro is made of a hook surface and a fleece surface that are stuck to the two sides of the object that needs to be fitted in various ways. The two sides of the object can be pulled apart or fitted together by pulling the hook surface and the fleece surface apart.

[0003] At present, the Velcro used in diapers is a velvet surface formed by gluing a mesh woven net on a plastic film. Since the front waist tape of diapers often needs to be repeatedly peeled off, a thicker plastic film or a plastic film composite fiber layer material must be selected to ensure the use effect. However, when the existing left and right Velcro is produced, the hook surface (or needle surface) of the Velcro is made by sizing the dyed embryo belt hook surface and then cutting the nylon monofilament on the surface of the embryo belt evenly and appropriately through an imported hook cutting machine to form a embryo belt with hook adhesion. However, the hook surface produced by this method is very rough, and it is easy to scratch or abrade the baby's skin if it is not used properly, which is uncomfortable to use. Summary of the invention

[0004] Therefore, in order to solve the above problems, the present invention provides a method for manufacturing ultrasonic left and right Velcro fasteners and a diaper.

[0005] In order to solve the above technical problems, the present invention adopts the following solution: an ultrasonic left and right Velcro manufacturing method, comprising a hook surface manufacturing process, selecting a hook surface material for hot rolling to form a hook surface substrate and rolling it up, and punching convex dots on the hook surface substrate through an ultrasonic dotting device to form a hook surface; The ultrasonic spotting device comprises a base; The machine platform is fixedly mounted on the base, and a machine base is arranged at the center thereof; The ultrasonic component is installed on the machine base, including an ultrasonic generator, a transducer connected to the ultrasonic generator, a welding head connected to the transducer and capable of moving up and down, and a welding seat fixed on the machine platform and located below the welding head. A heat-conducting cavity for periodically filling cold and hot media is formed in the welding seat. When the welding head is pressed down to the welding seat for spotting, the heat-conducting cavity in the welding seat is filled with hot media. When the welding head is lifted from the welding seat after spotting is completed, the heat-conducting cavity in the welding seat is filled with cold media.

[0006] A further improvement is that a plurality of convex point pressing holes for forming convex points on the surface of the hook surface substrate are formed on the bottom surface of the welding head.

[0007] Further improvement is that: the ultrasonic dotting equipment also includes a unwinding roller, a winding roller and a driving device, the unwinding roller and the winding roller are respectively arranged on both sides of the ultrasonic component, the hook surface substrate is stretched and extended between the unwinding roller and the winding roller, and the middle section of the hook surface substrate is supported on the welding seat.

[0008] A further improvement is that: a plurality of guide rollers are rotatably arranged on the machine platform, and the hook surface substrate extends between the plurality of guide rollers.

[0009] A further improvement is that the ultrasonic dot marking device also includes two sets of tensioning roller assemblies arranged on both sides of the machine base, and the tensioning roller assembly includes a support rod, an elastic telescopic rod fixedly installed at the end of the support rod and extending vertically downward, and a tensioning roller rotatably installed on the telescopic end of the elastic telescopic rod.

[0010] Further improvements are: the ultrasonic dotting equipment also includes a heat exchange component, including a circulation pump, an electric three-way valve, a semiconductor refrigeration plate, a heat exchanger and a number of connecting pipes, the welding seat, the circulation pump, the electric three-way valve, and the first heat exchanger are connected in sequence to form a refrigerant circulation loop; the welding seat, the circulation pump, the electric three-way valve, and the second heat exchanger are connected in sequence to form a heat medium circulation loop, and the first heat exchanger and the second heat exchanger are respectively fixed on the cooling surface and the heating surface of the semiconductor refrigeration plate.

[0011] The present invention also provides a diaper, on which the magic buckle made by the above-mentioned manufacturing method is compounded.

[0012] By adopting the above technical solution, the beneficial effects of the present invention are: The ultrasonic left and right magic buckle manufacturing method of the present invention has a hook surface manufacturing process in which convex dots are punched by ultrasonic dotting equipment to form a hook surface, the formed hook surface surface is smooth and uniform, and no additional burrs are generated, and the composite diapers are suitable for baby skin; a heat-conducting cavity is formed in a welding seat of the ultrasonic dotting equipment, and a refrigerant and a heat medium are intermittently and periodically filled to allow the surface of the welding seat to exchange heat, so that the hook surface substrate supported on the surface of the welding seat can be preheated and quickly cooled according to different stages during the dotting operation cycle, thereby achieving preheating of the substrate before dotting and improving plasticity, and achieving rapid cooling of the convex dots after dotting, so as to achieve rapid forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the ultrasonic spotting device according to an embodiment of the present invention.

[0014] Figure 2 It is a schematic diagram of the structure of a welding seat in an ultrasonic spot marking device according to an embodiment of the present invention.

[0015] Figure 3It is a schematic diagram of the structure of a welding head in an ultrasonic spot marking device according to an embodiment of the present invention.

[0016] In the figure: machine 1, unwinding roller 2, hook surface base material coil 3, guide rollers 4, 5, 6, 7; tensioning roller assembly 8, support rod 9, elastic telescopic rod 10, tensioning roller 11, machine base 12, ultrasonic generator 13, transducer 14, welding head 15, winding roller 16, driving device 17, base 18, circulating pump 19, electric three-way valve 20, semiconductor cooling plate 21, cooling surface 21a, heating surface 21b, heat exchanger 22, 23; conduits 24, 25, 29; welding seat 26, convex point pressing hole 27. DETAILED DESCRIPTION

[0017] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Example

[0018] The Velcro disclosed in the embodiment of the present invention comprises hook surfaces respectively compounded on the left and right sides of the waistline of the diaper and a fleece surface compounded on the abdomen of the diaper. When in use, the diaper is wrapped around the crotch of the baby from front to back, and the hook surfaces compounded on the left and right sides of the waistline of the diaper are passed around the waist from back to front and bonded to the fleece surface on the front abdomen of the diaper, so that the fleece surface and the hook surface can be bonded to each other, thereby realizing the wearing and fixing of the diaper.

[0019] The ultrasonic left-right magic button manufacturing method of the present invention includes a hook surface manufacturing process, and the hook surface manufacturing process specifically includes the following steps: S1: Select thermoplastic synthetic long fibers as hook surface materials, comb the long fibers into a fiber web, and then feed the fiber web into a web laying machine to cross-lay the fiber web into a laid web, the number of the laid web layers is 3, and then pass through a hot rolling mill for hot rolling, and after cooling, form a hook surface substrate of a sheet-shaped Velcro, and then roll up the hook surface substrate; S2: The hook surface substrate obtained in step S1 is dotted by ultrasonic dotting equipment to form a hook surface, and then rolled up for storage.

[0020] See also Figure 1 , Figure 1The schematic diagram of the structure of the ultrasonic dotting device used in the ultrasonic left and right magic buckle manufacturing method of the present invention is shown. The dotting device forms a heat-conducting cavity in the welding seat 26, and intermittently and periodically fills the cold and heat medium to make the surface of the welding seat 26 exchange heat and cold. The cold and hot cycle is set in this way. When the welding head 15 is pressed down to the welding seat 26 to perform the dotting operation, the heat-conducting cavity in the welding seat 26 is filled with heat medium, which is used to preheat the hook surface substrate supported on the surface of the welding seat 26 before dotting to improve its plasticity; when the welding head 15 is lifted from the welding seat 26 after the dotting is completed, the heat-conducting cavity in the welding seat 26 is filled with cold medium, which is used to make the hook surface formed by the high-frequency vibration of the welding head 15 and the dotting be completed quickly cool down on the welding seat 26, so that the convex points formed on the hook surface are quickly formed.

[0021] like Figure 1 As shown, the ultrasonic dotting equipment includes a base 18, a machine 1 installed on the base 18, an ultrasonic component assembled on a central machine base 12 of the machine 1, a reel 2 and a reel 16 installed on the machine 1 and located at the feed end and the discharge end of the ultrasonic component, and a heat exchange component arranged in the machine base 12, and the heat exchange component is connected to the welding seat 26 on the ultrasonic component to realize the periodic heat exchange of the heat-conducting cavity in the welding seat 26.

[0022] The ultrasonic assembly includes an ultrasonic generator 13 fixedly mounted on a machine base 12, the ultrasonic generator 13 is used to generate ultrasonic energy; a transducer 14 connected to the ultrasonic generator 13, used to convert the ultrasonic energy generated by the ultrasonic generator 13 into high-frequency mechanical vibration, and transmit the mechanical vibration to the welding head 15; a welding head 15 that can be telescopically arranged up and down, the welding head 15 is connected to the output end of the transducer 14, and can move up and down to complete the lifting and pressing actions, the transducer 14 receives the ultrasonic energy generated by the ultrasonic generator 13, and converts it into mechanical vibration and outputs it to the welding head 15, so that the welding head 15 generates high-frequency vibration; a welding seat 26 fixed on the machine 1 and located directly below the welding head 15, the welding seat 26 is used to support the hook surface substrate to be dotted, and cooperates with the welding head 15 to generate extrusion force, and frictionally melts the hook surface substrate supported on the welding seat 26 to convex dots under the high-frequency vibration state of the welding head 15.

[0023] Figure 3The bottom schematic diagram of the welding head 15 is shown. The bottom surface of the welding head 15 is formed with a plurality of convex point pressing holes 27 for forming convex points on the surface of the hook surface substrate. The convex point pressing holes 27 are formed as circular blind holes extending upward from the bottom surface of the welding head 15. The convex point pressing holes 27 are arranged in a rectangular array on the bottom surface of the welding head 15 to achieve continuous convex point punching of the hook surface substrate. During operation, the welding head 15 is pressed downward on the welding seat 26, and the frictional high temperature generated by its high-frequency vibration melts the upper surface of the hook surface substrate, wherein a part of the substrate enters the convex point pressing hole 27 of the welding head 15, and the rest is pressed downward, and the part entering the convex point pressing hole 27 eventually forms a convex point on the hook surface.

[0024] See also Figure 2 , Figure 2 The cross-sectional view of the welding seat 26 is shown. The welding seat 26 is made of a rigid heat-conducting material with good pressure resistance and thermal conductivity. For example, a metal welding seat 26 is used, and a heat-conducting cavity for filling a refrigerant or a heat medium is formed inside the welding seat 26. Through the periodic filling of the refrigerant and the heat medium, the welding seat 26 is subjected to periodic heat exchange, thereby preheating or cooling down the hook surface substrate at different stages to achieve the purpose of rapid forming. Specifically, when the welding head 15 is pressed down to the welding seat 26 to perform the dotting operation, the heat-conducting cavity in the welding seat 26 is filled with a heat medium, and the hook surface substrate supported on the surface of the welding seat 26 is preheated before the dotting to improve its plasticity; when the welding head 15 is lifted from the welding seat 26 after the dotting is completed, the heat-conducting cavity in the welding seat 26 is filled with a refrigerant, and its function is that the hook surface formed after the high-frequency vibration of the welding head 15 and the dotting is completed is quickly cooled down on the welding seat 26, so that the convex points formed on the hook surface are quickly formed.

[0025] In this embodiment, the unwinding roller 2 is installed on the feeding end side of the ultrasonic component ( Figure 1 The unwinding roller 2 can rotate along its own axis, and the hook surface substrate coil 3 is fixed on the unwinding roller 2 to achieve unwinding. The rewinding roller 16 is installed on the side of the discharge end of the ultrasonic component ( Figure 1 The winding roller 16 can also rotate along its own axis, and the hook surface coil formed after the convex point is wound on the winding roller 16, and the winding roller 16 is also connected to the driving device 17 to drive it to rotate. The hook surface base material is stretched and extended between the unwinding roller 2 and the winding roller 16, and the middle section of the hook surface base material is supported on the welding seat 26 for the convex point operation.

[0026] In this embodiment, in order to achieve continuous extension of the hook surface substrate between the unwinding roller 2 and the winding roller 16, and the middle section of the hook surface substrate is supported on the welding seat 26, guide rollers 4, 5, 6, and 7 are also rotatably arranged on the machine 1, wherein the guide rollers 4 and 5 are located between the unwinding roller 2 and the ultrasonic component; the guide rollers 6 and 7 are located between the winding roller 16 and the ultrasonic component, the hook surface substrate continuously extends between the guide rollers 4, 5, 6, and 7, and a section of the hook surface substrate between the guide rollers 5 and 6 is supported on the welding seat 26.

[0027] Furthermore, two sets of tensioning roller assemblies 8 are respectively arranged on both sides of the machine base 12, and their function is to tension the hook surface base material, including a support rod 9 fixedly mounted on the machine base 12, an elastic telescopic rod 10 fixedly mounted at the end of the support rod 9 and extending vertically downward, the elastic telescopic rod 10 has a telescopic end that can move up and down, and the telescopic end is subjected to an upward pulling force under the action of an elastic member (not shown in the figure); and a tensioning roller 11 rotatably mounted on the telescopic end of the elastic telescopic rod 10. The hook surface base material bypasses the bottom of the guide roller 4 and extends to the top of the tensioning roller 11, and then bypasses the bottom of the guide roller 5 to enter the welding seat 26. The tensioning roller assembly 8 on the other side adopts the same winding method, which will not be repeated here. During the winding process, the hook surface base material is subjected to an elastic pulling force upward by the tensioning roller 11, thereby achieving tension and ensuring that the hook surface base material remains in a straight state.

[0028] Combination Figure 1 , 2 The heat exchange component is assembled in the base 12, which is connected to the welding seat 26 on the ultrasonic component to realize the periodic heat exchange of the heat-conducting cavity in the welding seat 26, including a circulation pump 19, an electric three-way valve 20, a semiconductor refrigeration plate 21, a heat exchanger and a plurality of connecting conduits. The bottom liquid outlet of the welding seat 26 is connected to the liquid inlet end of the circulation pump 19 through a conduit 29. The electric three-way valve 20 has three ports, the common end of which is connected to the liquid outlet end of the circulation pump 19, and the first branch end of the electric three-way valve 20 is connected to the heat exchanger 22, and the heat exchanger 22 is connected to the liquid return port of the welding seat 26 through a conduit 24. The above arrangement enables the welding seat 26, the circulation pump 19, the electric three-way valve 20, and the heat exchanger 22 to be connected in sequence and form a refrigerant circulation loop. The second branch end of the electric three-way valve 20 is connected to the heat exchanger 23, and the heat exchanger 23 is connected to the liquid return port of the welding seat 26 through a conduit 25. The above arrangement enables the welding seat 26, the circulation pump 19, the electric three-way valve 20, and the heat exchanger 23 to be connected in sequence to form a heat medium circulation loop. The refrigerant circulation loop and the heat medium circulation loop are filled with a fluid heat exchange agent.

[0029] The semiconductor refrigeration sheet 21 serves as both a cold source and a heat source. When the semiconductor refrigeration sheet 21 is powered on, a large temperature difference is formed on its two sides. The low-temperature side forms a cooling surface 21a, and the high-temperature side forms a heating surface 21b. The cooling surface 21a and the heating surface 21b are respectively fixed with heat exchangers 22 and 23 to achieve cooling and heating of the fluid heat exchanger.

[0030] The working mode of the present invention is as follows: The hook surface substrate coil 3 is passed through and fixed on the unwinding roller 2, and its end portion passes through the guide roller 4, the tensioning roller 1111, and the guide roller 5 in turn, and enters the ultrasonic component from the feeding end and is tightly supported on the welding seat 26, and then is led out from the discharging end, passes through the guide roller 6, another tensioning roller 11, and the guide roller 7 in turn, and is wound on the winding roller 16. The driving device 17 drives the winding roller 16 to wind up, and a section of the hook surface substrate between the guide rollers 5 and 6 is tightly supported on the welding seat 26. During the cooling stage, the common end and the first branch end of the electric three-way valve 20 are connected, and the fluid heat exchanger circulates in the above-mentioned refrigerant circulation circuit. The welding head 15 is in the pressing stage and is about to perform dotting. Before dotting, the undotted hook surface substrate is preheated under the heating effect of the welding seat 26, thereby increasing the plasticity and preparing for dotting.

[0031] This embodiment also provides a diaper on which the magic buckle made by the above-mentioned manufacturing method is compounded.

[0032] Although the above embodiments have been described, once those skilled in the art know the basic creative concepts, they can make additional changes and modifications to these embodiments. Therefore, the above description is only an embodiment of the present invention and does not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for making ultrasonic left and right magic buttons, including a hook surface making process, characterized in that: Selecting hook surface materials for hot rolling to form hook surface base materials and rolling them up, and punching convex dots on the hook surface base materials through ultrasonic dotting equipment to form hook surfaces; The ultrasonic spotting device comprises a base; The machine platform is fixedly mounted on the base, and a machine base is arranged at the center thereof; The ultrasonic component is installed on the machine base, including an ultrasonic generator, a transducer connected to the ultrasonic generator, a welding head connected to the transducer and capable of moving up and down, and a welding seat fixed on the machine platform and located below the welding head. A heat-conducting cavity for periodically filling cold and hot media is formed in the welding seat. When the welding head is pressed down to the welding seat for spotting, the heat-conducting cavity in the welding seat is filled with hot media. When the welding head is lifted from the welding seat after spotting is completed, the heat-conducting cavity in the welding seat is filled with cold media.

2. The method for making ultrasonic left and right magic buttons according to claim 1, characterized in that: A plurality of convex point pressing holes are formed on the bottom surface of the welding head for forming convex points on the surface of the hook surface substrate.

3. The method for making ultrasonic left and right magic buttons according to claim 1, characterized in that: The ultrasonic dotting equipment also includes a unwinding roller, a winding roller and a driving device. The unwinding roller and the winding roller are respectively arranged on both sides of the ultrasonic component. The hook surface substrate is stretched and extended between the unwinding roller and the winding roller. The middle section of the hook surface substrate is supported on the welding seat.

4. The method for making ultrasonic left and right magic buttons according to claim 3, characterized in that: The machine platform is also rotatably provided with a plurality of guide rollers, and the hook surface substrate extends between the plurality of guide rollers.

5. The method for making ultrasonic left and right magic buttons according to claim 4, characterized in that: The ultrasonic dotting device also includes two sets of tensioning roller assemblies arranged on both sides of the machine base, and the tensioning roller assembly includes a support rod, an elastic telescopic rod fixedly installed at the end of the support rod and extending vertically downward, and a tensioning roller rotatably installed on the telescopic end of the elastic telescopic rod.

6. The method for making ultrasonic left and right magic buttons according to claim 1, characterized in that: The ultrasonic dotting equipment also includes a heat exchange component, including a circulation pump, an electric three-way valve, a semiconductor refrigeration plate, a heat exchanger and a plurality of connecting pipes. The welding seat, the circulation pump, the electric three-way valve and the first heat exchanger are connected in sequence to form a refrigerant circulation loop; the welding seat, the circulation pump, the electric three-way valve and the second heat exchanger are connected in sequence to form a heat medium circulation loop. The first heat exchanger and the second heat exchanger are respectively fixed on the cooling surface and the heating surface of the semiconductor refrigeration plate.

7. A diaper, characterized in that: The diaper is compounded with a magic buckle made by the manufacturing method of any one of claims 1-6.

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