WO2023024182A1

WO2023024182A1 - Elastic waistband manufacturing apparatus

Info

Publication number: WO2023024182A1
Application number: PCT/CN2021/118109
Authority: WO
Inventors: 林笛; 黄雨昕
Original assignee: 泉州市汉威机械制造有限公司
Priority date: 2021-08-25
Filing date: 2021-09-14
Publication date: 2023-03-02
Also published as: CN113662751B; CN113662751A

Abstract

An elastic waistband manufacturing apparatus, comprising a rack (1), and an elastic film unwinding mechanism (91), a slow driving roller (92), a fast driving roller (93), a composite station (94), a fastening device (95), an intermediate driving roller (96), a cutting device (97), a tension cushioning mechanism (98) and an output driving roller (99) arranged on the rack (1) along an assembly line. An upper non-woven fabric conveying mechanism and a lower non-woven fabric conveying mechanism are provided at the composite station (94) on the rack (1). A plurality of welding point positions are arranged on the fastening device (95). A partition line (F) is formed by the welding point positions. An included angle (C) between the projection of the partition line (F) on the horizontal plane and the heading direction of the assembly line is 25-35 degrees. A plurality of cutting portions for forming cutting units on a sheet material are arranged on the cutting device (97). The present invention solves the technical problem in the field of existing disposable hygienic products that there is no elastic waistband manufacturing device which can achieve good air permeability and comfort.

Description

An elastic waist manufacturing device

technical field

The invention relates to the field of disposable sanitary products, in particular to an elastic waistline manufacturing device.

Background technique

At present, the application of elastic non-woven fabrics has been widely used, especially in the field of disposable sanitary products. Its structure is such as the composite elastic non-woven fabric structure disclosed in Chinese patent application number: CN201210380277.2 The composite elastic non-woven fabric structure includes an elastic fabric layer and a non-woven fabric layer. The non-woven fabric layer is integrated with the elastic fabric layer. And the manufacturing method of the composite elastic non-woven fabric includes: providing an elastic fabric layer; combining a non-woven fabric layer with the elastic fabric layer; heat pressing the non-woven fabric layer and the elastic fabric layer to make them flat; and cooling the non-woven fabric layer and the elastic fabric layer layer. By virtue of the composite elastic non-woven fabric structure and the manufacturing method thereof of the present invention, properties such as non-woven fabric strength, elastic force, tear strength and elongation can be effectively increased.

In the field of existing disposable sanitary products, the application of this kind of elastic material combined with non-woven fabric is mainly applied to the waist area of diapers. In order to meet the needs of ventilation, holes are usually punched on it. The holes are usually in accordance with It is carried out in a uniform distribution method to achieve a balance of strength and breathability. However, in order to meet the needs of strength, generally speaking, the holes should not be too dense, and it still cannot form a good ventilation effect, and the comfort when wearing is slightly poor. In existing applications, there is no manufacturing device capable of achieving effective breathability and comfortable wearing elastic waist.

Contents of the invention

Therefore, in view of the above problems, the present invention proposes an elastic waist manufacturing device, which solves the technical problem that there is no elastic waist manufacturing device that can achieve good ventilation and comfortable wearing in the field of disposable sanitary products.

In order to achieve the above object, the present invention adopts the following technical solutions: an elastic waist manufacturing device, including a frame and an elastic film unwinding mechanism arranged on the frame according to the assembly line, a slow driving roller, a fast driving roller, and a composite station , fastening device, intermediate driving roller, cutting device, tension buffer mechanism, output driving roller, the frame is located at the composite station with an upper non-woven fabric conveying mechanism and a lower non-woven fabric conveying mechanism, and the upper non-woven fabric conveying mechanism The woven fabric conveying mechanism includes an upper nonwoven fabric unwinding mechanism, an upper nonwoven fabric buffering mechanism, an upper nonwoven fabric driving roller, and an upper nonwoven fabric rectifying mechanism, and the lower nonwoven fabric conveying mechanism includes a lower nonwoven fabric unwinding mechanism , the lower non-woven fabric buffer mechanism, the lower non-woven fabric driving roller, and the lower non-woven fabric rectifying mechanism. The fastening device is provided with a plurality of welding points, and each welding point forms a partition line, and the partition The included angle between the projection of the line on the horizontal plane and the traveling direction of the assembly line is 25-35 degrees. Both the fastening device and the cutting device are ultrasonic welding devices. The cutting device includes a welding head, and the middle part of the welding head is provided with There is a penetrating part, the bonding part is arranged on the peripheral side of the penetrating part on the welding head, the heating roller mechanism is arranged on the front end of the cutting device on the frame, and the rear part of the cutting device is located on the frame There is a cooling roller mechanism at the end, and the cooling roller mechanism includes a fixed speed roller group and a variable speed roller group arranged at intervals. 50% to 150% change in speed.

Further, the cutting device operates synchronously with the fastening device, and when the fastening device forms continuous partition lines with intervals on the sheet, the cutting device forms evenly distributed partition lines between two adjacent partition lines. Multiple cutting units.

Further, a cutting area is formed between two adjacent separation lines, and the connection line of the lower ends of the plurality of cutting units in the same cutting area is a first connection line, and the first connection line is parallel to the separation line.

Further, the distance between the first connecting line and the closest dividing line is 2.2-2.7mm.

Further, the cutting device has a plurality of cutting parts for forming cutting units on the sheet, and the cutting parts include a long strip-shaped upper cutting part arranged along the vertical cutting, and a long upper cutting part arranged along the vertical cutting. The strip-shaped lower cutting part, the left cutting part arranged along the vertical cutting on the left side of the upper cutting part, and the right cutting part arranged along the vertical cutting on the right side of the lower cutting part.

Further, the left cutting part and the right cutting part are cut vertically to form a long strip, and the length of the left cutting part and the right cutting part is shorter than that of the upper cutting part or the lower cutting part.

Further, the upper cutting part, the left cutting part, the lower cutting part and the right cutting part of the same cutting part form a rhombus.

Further, there are more than two left cutting parts, and more than two left cutting parts form an oblique first oblique line with the upper cutting part.

Further, there are more than two right cutting parts, and more than two right cutting parts form a second oblique line with the lower cutting part.

Further, the bonding part and the penetration part have a smooth transition, the bonding part is provided with a heat-insulating paint layer, and the heat-insulating paint layer is used to insulate the temperature of 30-60 °C, and the penetration part The free end is sharp.

By adopting the aforementioned technical solution, the beneficial effects of the present invention are: the setting of this solution can form an elastic waistline composed of upper non-woven fabric, elastic film and lower non-woven fabric. point sticking state, and form welding points, each welding point forms a plurality of interval division lines, and by being provided with a plurality of cutting parts, a plurality of cutting parts form a plurality of gaps between two adjacent division lines. cutting unit. The cutting part includes an upper cutting part, a left cutting part, a lower cutting part and a right cutting part, so that corresponding structures can be formed on the elastic waist. And because the elastic film is in the transversely stretched state, it will make the elastic film form flat air holes at the upper cutting part, the lower cutting part, the left cutting part and the right cutting part. Shape, its size is often related to the vertical cutting length. The vertical length of the upper cutting part and the lower cutting part is generally set to 1.5~5mm, the vertical length of the left cutting part and the right cutting part is generally set to 0.5~2mm, the upper cutting part or the lower cutting part and the left cutting part Or the ratio of the right cutting part is usually 2 to 3:1. As for the width of the upper cutting part, the lower cutting part, the left cutting part and the right cutting part, the smaller the better, the forming method can be cutting or other means, and ultrasonic welding can be used to achieve penetration, which can form better of molding. After ultrasonic welding is used, the upper non-woven fabric and the lower non-woven fabric can also be bonded, that is, welding holes are formed at the positions of the upper cutting part, the lower cutting part, the left cutting part and the right cutting part, so that the ventilation holes It will expand in this position, which will make the ventilation effect better.

In this solution, the elastic film can be stretched effectively through the setting of the slow driving roller and the fast driving roller, and the stretching ratio can be adjusted by the speed ratio of the slow driving roller and the fast driving roller. Then after compounding, the fastening device is used for point bonding, and cutting is performed after point bonding, so as to effectively realize the formation of air holes on the elastic film. The cutting is carried out in a specific way, so that the air holes on the elastic film It is stretched under the action of elasticity to form a flat shape, so that the breathable effect is good, and because it is cut in a stretched state, the stretching after cutting is basically in a relatively limit state, that is to say, after cutting The maintenance state is basically equal to the state when wearing it. With such a setting, it is more convenient to set the parameters, so that the molding accuracy of the elastic waistline is higher and the molding effect is better.

Further, each cutting unit has two left cutting parts and two right cutting parts, and the ventilation holes at the upper cutting part, lower cutting part, left cutting part and right cutting part form a better ventilation structure. Furthermore, the setting of the first oblique line and the second oblique line can form a better arrangement, realize better arrangement of the cutting units, and thus realize effective ventilation. Furthermore, the partition line is inclined, which can form a better distribution effect. When stretching horizontally, through such oblique restriction, better stability can be achieved. Through the parallelism of the first connecting line and the partitioning line, each air hole can exhibit a better stretch state. Such an arrangement can effectively control the stretching of each vent hole. The included angle between the partition line and the horizontal plane is 25-35 degrees, and the distance between the first connecting line and the closest partition line is 2.2-2.7 mm. Such numerical setting is a preferable range , a reasonable interval distribution can be formed. The upper cutting part, the left cutting part, the lower cutting part and the right cutting part of a cutting unit form a rhombus, which is also for realizing effective distribution. The upper non-woven fabric and the lower non-woven fabric are non-woven fabric materials, which can achieve better ventilation effect and have good elastic expansion and contraction performance in conjunction with the upper elastic film. Since it is a disposable hygienic product, its life expectancy is not high, and the destructive operation of cutting the elastic film will not cause a bad situation.

Further, the setting of the heating roller mechanism and the cooling roller mechanism aims to preheat the elastic film before cutting, so that the efficiency of ultrasonic welding can be higher, and the effect of penetration and bonding can be better. Then cooling is carried out, so that the bonding portion formed by the upper non-woven fabric and the lower non-woven fabric realizes better combination, is not easy to be separated, and the air-permeable through-hole can also maintain a better structure. Moreover, the elastic membrane can be basically restored to its original state, and the influence on the elastic membrane can be reduced. Moreover, through the setting of the heating roller mechanism and the cooling roller mechanism, effective clamping stability can be formed, and the sudden stretching of the elastic film after cutting can be avoided. The heating roller mechanism and the cooling roller mechanism should be installed as close as possible to the cutting device, so that the elastic film will not have a large change in elasticity after being cut, making the cutting more stable and the cutting position more accurate.

In addition, the cooling roller mechanism includes a fixed speed roller group and a variable speed roller group arranged at intervals, the fixed speed roller group and the heating roller mechanism run synchronously, and the speed variable roller group operates at 50% to 50% of the speed of the fixed speed roller group. 150% change. The purpose of this setting is to effectively reduce the incomplete cutting during cutting. Through differential conveying, the elastic film will be stretched, so that the air holes will be stretched again, thereby reducing the contact between the elastic film and the upper non-woven fabric. Or the situation where the non-woven fabric is sticky. The speed change of the variable-speed roller group is periodic, so that the frequency of its conveying material is basically consistent with that of the fixed-speed roller group. The deviation generated here will be eliminated by the tension buffer mechanism and the output drive roller mechanism.

Description of drawings

Fig. 1 is the structural representation of the elastic waistline that the present invention produces;

Fig. 2 is a cross-sectional view at A-A in Fig. 1;

Fig. 3 is a display state diagram of Fig. 1;

Fig. 4 is the reference figure of technique of the present invention;

Fig. 5 is a structural representation of the present invention;

Fig. 6 is a structural schematic diagram of the cooperation of the heating roller mechanism, the cooling roller mechanism and the cutting device;

Fig. 7 is a structural schematic diagram of the welding head.

Detailed ways

The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

Referring to Figures 1 to 4, the present embodiment provides an elastic waist, including an upper non-woven fabric 1, a lower non-woven fabric 2, and an elastic film 3 sandwiched between the upper non-woven fabric 1 and the lower non-woven fabric 2, The upper non-woven fabric 1 and the lower non-woven fabric 2 are air-permeable sheets, and non-woven fabric materials are selected in this scheme. The upper non-woven fabric 1, the elastic film 3, and the lower non-woven fabric 2 are fixed through a plurality of connecting parts to form fastening points 4, and each fastening point 4 is distributed to form a plurality of partition lines F, and each partition line F is along the Horizontally spaced, two adjacent partition lines F form a partition area 5, there is at least one cutting unit 6 in the adjacent two partition lines, and each cutting unit 6 includes a long strip-shaped upper cutting portion arranged along the vertical cutting 61. The elongated lower cutting part 62 arranged along the vertical cutting, the left cutting part 63 arranged along the vertical cutting on the left side of the upper cutting part 61, the left cutting part 63 arranged along the vertical cutting on the right side of the lower cutting part 62 Right cutting part 64, described left cutting part 63, right cutting part 64 are arranged to form elongated state along vertical cutting, and the length of described left cutting part 63, right cutting part 64 is less than upper cutting part 61 or lower cutting part 62, The upper cutting part 61, the lower cutting part 62, the left cutting part 63 and the right cutting part 64 respectively cut the upper non-woven fabric 1, the lower non-woven fabric 2 and the elastic film 3, and when the upper non-woven fabric 1 and the lower non-woven fabric 2 is in a flat state, and the elastic film 3 is in a transversely stretched state.

When the elastic film 3 is stretched, flat air holes 7 are formed at the upper cutting portion 61 , the lower cutting portion 62 , the left cutting portion 63 and the right cutting portion 64 .

In the vertical direction, the ventilation holes formed by the left cutting portion 63 and the right cutting portion 64 are respectively located between the ventilation holes formed by the upper cutting portion 61 and the lower cutting portion 62 . There are more than two left cutting portions 63 , in this solution, there are two. The two left cutting portions 63 and the upper cutting portion 61 form a first oblique line D in an oblique direction. There are more than two right cutting parts 64, and there are two right cutting parts 64 and the lower cutting part 62 to form an oblique second oblique line E. The first oblique line D is parallel to the second oblique line E, which results in a better, more uniform shape. The connecting line connecting the lower ends of the lower cutting portions 62 of two adjacent cutting units 6 is a first connecting line G, and the first connecting line G is parallel to each partition line F. The included angle C between the partition line F and the horizontal plane is 25-35 degrees. The distance between the first connecting line G and the closest dividing line F is 2.2-2.7 mm. The upper cutting portion 61 , the left cutting portion 63 , the lower cutting portion 62 and the right cutting portion 64 of one cutting unit 6 form a rhombus H. The length of the fastening point 4 along the longitudinal direction is greater than the length along the transverse direction, the ratio is 2-3:1.

In this solution, the upper cutting portion 61, the lower cutting portion 62, the left cutting portion 63, and the right cutting portion 64 are formed by ultrasonic welding, air holes are formed at the elastic film, and the upper non-woven fabric and the lower The non-woven fabric forms a bond, and a ventilating through hole 8 is formed at the bond site. In this solution, the upper cutting portion 61 , the lower cutting portion 62 , the left cutting portion 63 and the right cutting portion 64 may also be formed by cutting with a blade. The stretch ratio of the elastic film is generally 1.5-4, of course, it can also be larger or smaller, and the thickness of the elastic film is selected between 0.2-1mm.

A method for manufacturing an elastic waistline based on the same inventive concept, comprising the following steps:

The first step is to unwind the elastic film, pass through the slow driving roller and then pass through the fast driving roller to form a differential conveying, so as to realize the stretching of the elastic film;

In the second step, the upper non-woven fabric and the lower non-woven fabric are combined on the upper surface and the lower surface of the elastic film to form a sheet, and then fixed by a fastening device, so that the upper non-woven fabric, the elastic film and the lower non-woven fabric are connected. Fastening points are formed, each fastening point is distributed to form a plurality of partition lines, and each partition line is arranged at intervals along the transverse direction;

The third step is to achieve smoothness through the middle driving roller rolling;

The fourth step is to use a cutting device to cut the sheet, so that there is at least one cutting unit in the two partition lines on the adjacent sheet, and each cutting unit includes a long strip-shaped upper cutting portion arranged along the vertical cutting, The elongated lower cutting part arranged vertically, the left cutting part positioned along the vertical cutting on the left side of the upper cutting part, the right cutting part arranged along the vertical cutting on the right side of the lower cutting part, the left The cutting part and the right cutting part are arranged along the vertical cutting to form a strip state. The length of the left cutting part and the right cutting part is smaller than the upper cutting part or the lower cutting part. The upper cutting part, the lower cutting part, the left cutting part, The right cutting part cuts the upper non-woven fabric, the lower non-woven fabric and the elastic film respectively. After cutting, the elastic film is located at the upper cutting part, the lower cutting part, the left cutting part and the right cutting part under the action of transverse tension to form a breathable The width of each ventilation hole in the horizontal direction is greater than the length in the vertical direction, forming a flat shape;

In the fifth step, the sheet passes through the tension buffer mechanism, and then is driven out by the output drive roller.

With reference to Fig. 5, present embodiment also provides a kind of elastic waistline manufacturing device, comprises frame 1 and is arranged on frame according to the elastic film unwinding mechanism 91 of assembly line, slow speed driving roller 92, fast driving roller 93, composite station 94. Fastening device 95, intermediate driving roller 96, cutting device 97, tension buffer mechanism 98, output driving roller 99, the frame is located at the composite station 94 and connected to the upper non-woven fabric conveying mechanism and the lower non-woven fabric The conveying mechanism can realize the compounding of the upper non-woven fabric, the elastic film and the lower non-woven fabric. The upper non-woven fabric conveying mechanism includes an upper non-woven fabric unwinding mechanism 910, an upper non-woven fabric buffer mechanism 911, and an upper non-woven fabric driving mechanism. The roller 912, the upper non-woven fabric correction mechanism 913, the lower non-woven fabric conveying mechanism includes the lower non-woven fabric unwinding mechanism 914, the lower non-woven fabric buffer mechanism 915, the lower non-woven fabric driving roller 916, and the lower non-woven fabric correction mechanism 917 .

The above-mentioned mechanisms are conventional mechanisms in the field, and the specific structures have been disclosed, and the relevant patents of the applicant can be referred to. Only the fastening device 95 and the cutting device 97 need to have a specific arrangement of points. Both the fastening device 95 and the cutting device 97 are ultrasonic welding devices, wherein the cutting device 97 can form a plurality of cutting units on the sheet at one time, as shown in FIG. 3 , between two adjacent partition lines Multiple cutting units in the cutting area form the most basic welding unit, and the distribution of welding heads can also refer to Figure 3. Multiple cutting units in the cutting area between two adjacent division lines form a One standard cutting unit, multiple standard cutting units are evenly distributed on the roll surface of the upper cutting roll. The upper cutting portion 61, the lower cutting portion 62, the left cutting portion 63, and the right cutting portion 64 of the cutting unit 6 are the upper cutting portion, the lower cutting portion, the left cutting portion, and the right cutting portion of the cutting device 97. The representation of the welding head distribution can be better shown in Figure 3.

Referring to Fig. 7, the cutting device 97 includes a welding head 974, the middle of the welding head 974 is provided with a penetration portion 9741, and the welding head 974 is provided with an adhesive portion 9742 on the peripheral side of the penetration portion 9741 , the bonding part 9742 and the penetrating part 9741 have a smooth transition, the bonding part 9742 is provided with a heat-insulating paint layer 9743, and the heat-insulating paint layer 9743 is used to insulate the temperature of 30-60 °C, and the temperature is passed through Insulation can make the forming efficiency of this part deteriorate during ultrasonic vibration, so that penetration cannot be formed, but adhesion will be formed. Moreover, due to the smooth transition, which is actually an arc transition, there will be no abutting fit, and no penetration will be formed during ultrasonic welding. The free end of the penetrating portion 9741 is sharp.

Referring again to FIG. 6 , the front end of the cutting device 97 is provided with a heating roller mechanism 971 on the frame, and the cooling roller mechanism is provided at the rear end of the cutting device 97 on the frame. The cooling roller mechanism includes a fixed speed roller group 972 and a variable speed roller group 973 arranged at intervals. The fixed speed roller group 972 runs synchronously with the heating roller mechanism 971. 50% ~ 150% change. The heating roller mechanism 971, the fixed-speed roller group 972 and the variable-speed roller group 973 in this program are all conventional structures with two upper and lower rollers, which are conventional technical means. Purpose.

The arrangement of this scheme can form an elastic waistline composed of upper non-woven fabric, elastic film and lower non-woven fabric, and its compounding is carried out by a fastening device, forming a point-bonded state on the elastic waistline, and forming welding points, each welding point A plurality of interval division lines are formed, and by providing a plurality of cutting parts, the plurality of cutting parts form a plurality of cutting units between two adjacent division lines. The cutting part includes an upper cutting part, a left cutting part, a lower cutting part and a right cutting part, so that corresponding structures can be formed on the elastic waist. And because the elastic film is in the transversely stretched state, it will make the elastic film form flat air holes at the upper cutting part, the lower cutting part, the left cutting part and the right cutting part. Shape, its size is often related to the vertical cutting length. The vertical length of the upper cutting part and the lower cutting part is generally set to 1.5~5mm, the vertical length of the left cutting part and the right cutting part is generally set to 0.5~2mm, the upper cutting part or the lower cutting part and the left cutting part Or the ratio of the right cutting part is usually 2 to 3:1. As for the width of the upper cutting part, the lower cutting part, the left cutting part and the right cutting part, the smaller the better, the forming method can be cutting or other means, using ultrasonic welding, and achieving penetration, can form better of molding. After ultrasonic welding, the upper non-woven fabric and the lower non-woven fabric can also be bonded, that is, welding holes are formed at the positions of the upper cutting part, the lower cutting part, the left cutting part and the right cutting part, so that the ventilation holes It will expand in this position, which will make the ventilation effect better.

Further, each cutting unit has two left cutting parts and two right cutting parts, and the ventilation holes at the upper cutting part, lower cutting part, left cutting part and right cutting part form a better ventilation structure. Furthermore, the setting of the first oblique line and the second oblique line can form a better arrangement, realize better arrangement of the cutting units, and thus realize effective ventilation. Furthermore, the partition line is inclined, which can form a better distribution effect. When stretching horizontally, through such oblique restriction, better stability can be achieved. Through the parallelism of the first connecting line and the partitioning line, each air hole can exhibit a better stretch state. Such setting can effectively control the stretching of each vent hole. The included angle between the partition line and the horizontal plane is 25-35 degrees, and the distance between the first connecting line and the closest partition line is 2.2-2.7 mm. Such numerical setting is a preferable range , a reasonable interval distribution can be formed. The upper cutting part, the left cutting part, the lower cutting part and the right cutting part of a cutting unit form a rhombus, which is also for realizing effective distribution. The upper non-woven fabric and the lower non-woven fabric are made of non-woven fabric materials, combined with the upper elastic film, so as to achieve better ventilation effect and have good elastic stretching performance. Since it is a disposable hygienic product, its life expectancy is not high, and the destructive operation of cutting the elastic film will not cause a bad situation.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be directly connected or indirectly connected through an intermediary, it can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined by the appended claims. Making various changes is within the protection scope of the present invention.

Claims

An elastic waist manufacturing device is characterized in that it includes a frame and an elastic film unwinding mechanism arranged on the frame according to the assembly line, a slow driving roller, a fast driving roller, a composite station, a fastening device, an intermediate driving roller, Cutting device, tension buffer mechanism, and output driving roller. The frame is located at the compound station and is provided with an upper non-woven fabric conveying mechanism and a lower non-woven fabric conveying mechanism. The upper non-woven fabric conveying mechanism includes an upper non-woven fabric Unwinding mechanism, upper non-woven fabric buffer mechanism, upper non-woven fabric driving roller, upper non-woven fabric correction mechanism, the lower non-woven fabric conveying mechanism includes lower non-woven fabric unwinding mechanism, lower non-woven fabric buffer mechanism, lower The non-woven fabric drive roller, the lower non-woven fabric correction mechanism, the fastening device is provided with a plurality of welding points, and each welding point forms a partition line, and the projection of the partition line on the horizontal plane is the same as that of the assembly line. The included angle in the direction of travel is 25-35 degrees. Both the fastening device and the cutting device are ultrasonic welding devices. The cutting device includes a welding head, and the middle part of the welding head is provided with a penetration part. A bonding part is provided on the peripheral side of the penetration part, a heating roller mechanism is provided on the front end of the cutting device on the frame, and a cooling roller mechanism is provided on the rear end of the cutting device on the frame. The cooling roller mechanism includes a fixed speed roller group and a variable speed roller group arranged at intervals, the fixed speed roller group and the heating roller mechanism run synchronously, and the variable speed roller group changes at 50% to 150% of the running speed of the fixed speed roller group.
An elastic waistline manufacturing device according to claim 1, wherein the cutting device and the fastening device operate synchronously, and when the fastening device forms continuous dividing lines with intervals on the sheet, the cutting device A plurality of cutting units are evenly distributed between two adjacent partition lines.
An elastic waistline manufacturing device according to claim 2, characterized in that: a cutting area is formed between two adjacent dividing lines, and the connecting line of the lower ends of the multiple cutting units in the same cutting area is the first connecting line. line, the first connecting line is parallel to the partition line.
An elastic waistline manufacturing device according to claim 3, characterized in that the distance between the first connecting line and the closest dividing line is 2.2-2.7mm.
According to an elastic waistline manufacturing device according to any one of claims 1 to 4, it is characterized in that: the cutting device has a plurality of cutting parts for forming cutting units on the sheet, and the cutting parts include The elongated upper cutting part arranged along the vertical cutting, the elongated lower cutting part arranged along the vertical cutting, the left cutting part arranged along the vertical cutting on the left side of the upper cutting part, the left cutting part located on the right side of the lower cutting part The right cut part of the side is set along the vertical cut.
An elastic waistline manufacturing device according to claim 5, characterized in that: the left cutting part and the right cutting part are cut vertically to form a long strip, and the lengths of the left cutting part and the right cutting part are shorter than the upper Cut or undercut.
The elastic waistline manufacturing device according to claim 5, characterized in that: the upper cutting part, the left cutting part, the lower cutting part and the right cutting part of the same cutting part form a rhombus.
The elastic waistline manufacturing device according to claim 5, characterized in that there are more than two left cutting parts, and more than two left cutting parts form a first oblique line with the upper cutting part.
The elastic waistline manufacturing device according to claim 5, characterized in that: there are more than two right cutting parts, and the more than two right cutting parts and the lower cutting part form a second oblique line.
An elastic waistline manufacturing device according to any one of claims 1 to 4, characterized in that: the bonding part and the penetrating part have a smooth transition, and the bonding part is provided with a heat-insulating paint layer, so The heat-insulating paint layer is used to insulate the temperature of 30-60°C, and the end of the penetration part is sharp.