Wrapping and folding device and wrapping and folding system

Abstract

According to the wrapping and folding device and the wrapping and folding system, a plurality of first adsorption holes are formed in a vacuum plate above a vacuum box, and a plurality of second adsorption holes used for adsorbing the middle part of a sanitary towel body in the conveying process are formed, so that the wrapping and folding precision of protective wings / protective wings and tail wings is improved; the sanitary napkin can be applied to various sanitary napkin products with different thicknesses. Besides, a shaping part in a horizontal state is arranged on the downstream side of the profiling curved surface part of the folding plate, and a gap between the shaping part and a conveying belt used for conveying sanitary towel products is configured to be matched with the thickness of the sanitary towel with the wrapped and folded protection wings / protection wings and tail wings. The folded wings / wings and empennages are prevented from loosening in the direction opposite to the folding direction, and therefore the folding size and precision of the wings / wings and empennages are improved.

Description

Technical Field

[0001] The present application relates to the technical field of disposable sanitary product manufacturing equipment, in particular to the fields of sanitary napkins, mini napkins, sanitary pads, and specifically to a folding device and a folding system. Background Art

[0002] The sanitary napkin in the disposable sanitary product has a pair of wings on both sides along the width direction. When the sanitary napkin is a night-time product, in addition to the pair of wings on both sides of the sanitary napkin, there is also a pair of tail wings. In order to facilitate packaging, the disposable sanitary product manufacturing equipment needs to be equipped with a folding system for folding the wings / wings and tail wings on both sides of the sanitary napkin toward the sanitary napkin body along a predetermined size. In order to be able to fold the wings / wings and tail wings when conveying sanitary napkin products, for example, in the patent application number 202021002891.1, the patent document named "Wing Folding System for Sanitary Napkin Products" discloses that a plurality of rows of waist-shaped holes are arranged on the first plate above the vacuum box, but these waist-shaped holes only correspond to the two sides of the sanitary napkin body along the width direction for adsorption. In the actual conveying and folding process, when the sanitary napkin enters the folding system, since only the two sides of the sanitary napkin body are adsorbed, the middle part of the sanitary napkin body will be warped (or bulged) due to not being adsorbed by negative pressure, resulting in the inability of the sanitary napkin product to be stably conveyed, thereby affecting the folding accuracy of the wings / wings and tail wings.

[0003] In addition, the folding system also has a folding plate for folding the wings / wings and tail toward the main body side. When the folding is completed, there is usually a small gap (usually 2mm to 3mm) between the sanitary napkin product and the folding plate to ensure that the sanitary napkin product passes smoothly. However, since the thickness of the wings / wings and tail is extremely thin (consisting of only two layers of material), the above gap will cause the wings / wings and tail to loosen (i.e., spread out) in the opposite direction of folding. In this case, the folding size will change (e.g., become larger), which will also affect the accuracy of folding the wings / wings and tail.

[0004] Therefore, it is necessary to propose solutions to the problems of the prior art. Utility Model Content

[0005] The present application provides a wrapping and folding device, which is provided with a plurality of first adsorption holes (which are located on both sides of the vacuum plate along the width direction, corresponding to both sides of the sanitary napkin body along the width direction) on the vacuum plate above the vacuum box, and a plurality of second adsorption holes (which are located at least at the entrance and exit of the vacuum plate, and along the width direction, between the plurality of first adsorption holes on both sides of the vacuum plate along the width direction, corresponding to the middle part of the sanitary napkin body) for adsorbing the middle part of the sanitary napkin body during the conveying process, thereby improving the wrapping and folding accuracy of the wing / wing and tail wing, and the wrapping and folding device can be applied to sanitary napkin products of various thicknesses. In addition, a shaping portion in a horizontal state is provided on the downstream side of the contoured curved portion of the folding plate, and the gap between the shaping portion and the conveyor belt for conveying the sanitary napkin product is configured to match the thickness of the sanitary napkin with the folded wing, so as to prevent the folded wing / wing and tail wing from loosening (i.e. spreading) in the opposite direction of the folding, thereby improving the folding size and accuracy of the wing / wing and tail wing. In addition, a wrapping and folding system provided by the present application also has the above-mentioned effects.

[0006] According to one aspect of the present application, an embodiment of the present application provides a folding device, which is applied to the manufacture of a sanitary napkin, wherein the sanitary napkin comprises a body having an absorbent structure and wings arranged on both sides of the body along a width direction, and the folding device comprises:

[0007] The vacuum box has a hollow structure and is connected to the adsorption device;

[0008] A vacuum plate is arranged on the conveying surface of the vacuum box; the vacuum plate comprises a plurality of first adsorption holes arranged along the process direction, and the plurality of first adsorption holes are arranged on both sides of the vacuum plate along the width direction; the vacuum plate further comprises a plurality of second adsorption holes arranged along the process direction; along the process direction, the plurality of second adsorption holes are arranged at least at the inlet of the vacuum plate and at the outlet of the vacuum plate; along the width direction, the plurality of second adsorption holes are located between the plurality of first adsorption holes on both sides of the vacuum plate along the width direction;

[0009] A conveyor belt, arranged above the vacuum plate, the conveyor belt having openings corresponding to the first adsorption holes and the second adsorption holes of the vacuum plate, for conveying the sanitary napkin from an upstream side to a downstream side;

[0010] A pair of folding plates are respectively arranged on both sides of the vacuum box along the width direction, the folding plates include a base and a contoured curved surface portion, the contoured curved surface portion is located on the downstream side of the base, and the contoured curved surface portion protrudes from the base along the height direction; the base is used to at least support the wings of the sanitary napkin; the contoured curved surface portion extends along the flow direction and is gradually folded from the upstream side end to the downstream side end, wherein the width direction is perpendicular to the flow direction, and the width direction is perpendicular to the height direction; the contoured curved surface portion includes a folding portion and a shaping portion respectively arranged on the upstream side and the downstream side, and a shaping portion arranged between the folding portion and the shaping portion, the shaping portion is used to gradually fold at least the wings from both sides of the sanitary napkin along the width direction toward the main body side of the sanitary napkin.

[0011] In some embodiments of the present application, the folding device also includes a first roller, a second roller and a driving roller; the first roller is located on the upstream side of the vacuum box, the second roller is located on the downstream side of the vacuum box, and the conveyor belt is annularly wound around the circumference of the first roller, the second roller and the driving roller, wherein the driving roller is used to provide driving force to drive the conveyor belt to perform circular motion.

[0012] In some embodiments of the present application, the sum of the apertures of the multiple second adsorption holes located at the entrance of the vacuum plate along the flow direction is at least greater than or equal to half of the length of the sanitary napkin; the sum of the apertures of the multiple second adsorption holes located at the exit of the vacuum plate along the flow direction is at least greater than or equal to half of the length of the sanitary napkin.

[0013] In some embodiments of the present application, the folding portion is arranged at the entrance of the contoured curved surface portion, for making the sanitary napkin enter a folded state in advance; the shaping portion is arranged at the exit of the contoured curved surface portion, for shaping the folded wings after folding.

[0014] In some embodiments of the present application, the contoured portion is configured to perform an arc-shaped twist from the folding portion arranged parallel to the base to the shaping portion arranged parallel to the base, wherein the relative twisting angle between the folding portion and the shaping portion is 180 degrees in total; after the folding is completed, the side of the wing that is in contact with the supporting surface of the folding portion is pressed by the shaping portion.

[0015] In some embodiments of the present application, the shaping portion and the conveyor belt of the folding device are arranged in parallel, and the spacing between the shaping portion and the conveyor belt in the height direction is a first spacing, and the first spacing is configured to match the thickness of the sanitary napkin with folded wings.

[0016] In some embodiments of the present application, the sanitary napkin also includes a tail wing, which is arranged on both sides of the main body along the width direction; the base is used to support the guard wings and the tail wing; the contoured portion is used to gradually fold the guard wings and the tail wing from both sides of the sanitary napkin along the width direction toward the main body side of the sanitary napkin.

[0017] According to another aspect of the present application, an embodiment of the present application further provides a wrapping and folding system, the wrapping and folding system comprising:

[0018] The folding device described in the above embodiment of the present application is located in the first flow path, and is used to fold at least the wings located on both sides of the sanitary napkin along the width direction toward the main body of the sanitary napkin along a preset size;

[0019] A conveying device and a cutting device are arranged in the second process path; the conveying device is located on the upstream side of the cutting device, and is used to convey the continuous release paper material; the cutting device is used to cut the release paper material into release paper sheets, and convey and at least attach them to the position of the folded wings.

[0020] In some embodiments of the present application, the interior of the conveying device has a vacuum adsorption structure for adsorbing the release paper material under negative pressure and conveying the release paper material to the cutting device.

[0021] In some embodiments of the present application, the cutting device includes a cutting roller and a bottom roller arranged opposite to each other, the outer peripheral surface of the cutting roller has a blade, and the bottom roller is provided with a bottom knife, when the blade of the cutting roller is tangent to the bottom knife of the bottom roller, the release paper material is at least cut into a first release paper sheet; the bottom roller is connected to an adsorption device, the interior of the bottom roller is an adsorption structure, and the outer peripheral surface of the bottom roller has at least a through hole corresponding to the first release paper sheet.

[0022] In some embodiments of the present application, the folding system further includes a gluing device, which is located on the upstream side of the conveying device and is used to glue the release paper material.

[0023] In some embodiments of the present application, the folding system further comprises a pressing roller for pressing the bottom roller of the cutting device so that the release paper sheet is at least attached to the wings of the sanitary napkin.

[0024] In some embodiments of the present application, the folding system further comprises an air blowing device, which is located at the entrance of the contoured curved surface portion and is arranged along the process direction.

[0025] In some embodiments of the present application, the blowing device includes a blowing rod, the outer peripheral surface of which is provided with blowing holes, and the blowing rod is connected to an external air source, and is used to blow air to the wing at least before the wing enters the contoured portion of the contoured curved surface portion, so as to keep the wing flat along the width direction.

[0026] In some embodiments of the present application, the sanitary napkin also includes a tail wing, which is arranged on both sides of the main body along the width direction; the folding device is used to fold the wings and the tail wing located on both sides of the sanitary napkin along the width direction toward the main body of the sanitary napkin along a preset size; the cutting device is used to cut the release paper material into a first release paper sheet and a second release paper sheet, and transport and attach them to the positions of the folded wings and the tail wing accordingly.

[0027] The folding device and folding system of the present application are provided with a plurality of first adsorption holes (which are located on both sides of the vacuum plate along the width direction, corresponding to both sides of the sanitary napkin body along the width direction) on the vacuum plate above the vacuum box, and a plurality of second adsorption holes (which are located at least at the entrance and exit of the vacuum plate, and along the width direction, between the plurality of first adsorption holes on both sides of the vacuum plate along the width direction, corresponding to the middle part of the sanitary napkin body) for adsorbing the middle part of the sanitary napkin body during the conveying process, thereby improving the folding accuracy of the wing / wing and tail wing, and the folding device and folding system can be applied to sanitary napkin products of various thicknesses. In addition, a shaping portion in a horizontal state is provided on the downstream side of the contoured curved portion of the folding plate, and the gap between the shaping portion and the conveyor belt for conveying the sanitary napkin product is configured to match the thickness of the sanitary napkin with the folded wing, so as to prevent the folded wing / wing and tail wing from loosening (i.e., spreading) in the opposite direction of the folding, thereby improving the folding size and accuracy of the wing / wing and tail wing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the folding of a sanitary napkin is shown, wherein the folding of the sanitary napkin is completed by a wrapping and folding system provided in an embodiment of the present application.

[0030] Figure 2 A schematic diagram of the folding of another sanitary napkin is shown, wherein the folding of the sanitary napkin is completed by the folding system provided in the embodiment of the present application.

[0031] Figure 3 A schematic diagram of the structure of the wrapping and folding system provided in an embodiment of the present application.

[0032] Figure 4 It is a side view of the folded sanitary napkin, and shows the positional relationship between the vacuum box and the folding plate.

[0033] Figure 5 for Figure 3 An example diagram of a vacuum panel is shown, and a hole opening method of the vacuum panel is shown.

[0034] Figure 6 for Figure 3 An example diagram of a vacuum panel is shown, and another opening method of the vacuum panel is shown.

[0035] Figure 7 A schematic diagram of the process of wrapping a sanitary napkin product with a folding plate in the wrapping and folding system provided in an embodiment of the present application.

[0036] Figure 8 An exemplary stereoscopic view of a folding plate in the folding system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0038] The embodiment of the present application provides a wrapping and folding device, which is used for the manufacture of sanitary napkins. The sanitary napkin includes a body with an absorbent structure and wings arranged on both sides of the body along the width direction. The wrapping and folding device includes: a vacuum box, which has a hollow structure and is connected to an adsorption device; a vacuum plate, which is arranged on the conveying surface of the vacuum box; the vacuum plate includes a plurality of first adsorption holes arranged along the process direction, and the plurality of first adsorption holes are arranged on both sides of the vacuum plate along the width direction; the vacuum plate also includes a plurality of second adsorption holes arranged along the process direction; along the process direction, the plurality of second adsorption holes are arranged at least at the inlet of the vacuum plate and at the outlet of the vacuum plate, and along the width direction, the plurality of second adsorption holes are located between the plurality of first adsorption holes on both sides of the vacuum plate along the width direction; a conveyor belt, which is arranged above the vacuum plate, and the conveyor belt has openings corresponding to the first adsorption holes and the second adsorption holes of the vacuum plate, which are used to transport the sanitary napkin from the upstream side to the downstream side; in this way, it can be ensured that the sanitary napkin on the conveyor belt is not only adsorbed by the first adsorption holes corresponding to the two sides of the sanitary napkin body along the width direction during the conveying process, but also by the first adsorption holes arranged on both sides of the sanitary napkin body along the width direction. , and is also adsorbed by the second adsorption hole correspondingly arranged in the middle part of the sanitary napkin body to improve the folding accuracy of the wings, which is particularly suitable for sanitary napkin products of different thicknesses; the folding device also includes a pair of folding plates, which are respectively arranged on both sides of the vacuum box along the width direction, the folding plate includes a base and a contoured curved surface portion, the contoured curved surface portion is located on the downstream side of the base, and the contoured curved surface portion protrudes from the base along the height direction; the base is used to at least support the wings of the sanitary napkin; the contoured curved surface portion extends along the process direction and is gradually folded from the upstream side end to the downstream side end, wherein the width direction is perpendicular to the process direction, and the width direction is perpendicular to the height direction; the contoured curved surface portion includes a folding portion and a shaping portion respectively arranged on the upstream side and the downstream side, and a shaping portion arranged between the folding portion and the shaping portion, the shaping portion is used to at least gradually fold the wings from both sides of the sanitary napkin along the width direction toward the main body side of the sanitary napkin.

[0039] It should be noted that the wrapping and folding device provided in the embodiment of the present application can be applied to the manufacture of sanitary napkins. The sanitary napkins can be daily sanitary napkins or night sanitary napkins. Daily sanitary napkins refer to sanitary napkins without tail wings but with wings, which can be obtained by folding the wings by the wrapping and folding device provided in the embodiment of the present application. Figure 1 A nighttime sanitary napkin is a sanitary napkin with both wings and tail wings, wherein the tail wings are fan-shaped, and the sanitary napkin can be obtained by folding the wings and tail wings by the folding device provided in this embodiment, which can be referred to in Figure 2 shown.

[0040] In some embodiments, the folding device also includes a first roller, a second roller and a driving roller; the first roller is located on the upstream side of the vacuum box, the second roller is located on the downstream side of the vacuum box, and the conveyor belt is annularly wound around the circumference of the first roller, the second roller and the driving roller, wherein the driving roller is used to provide driving force to drive the conveyor belt to perform circular motion.

[0041] In some embodiments of the present application, the sum of the apertures of the plurality of second adsorption holes at the entrance of the vacuum plate along the flow direction is at least greater than or equal to half the length of the sanitary napkin; the sum of the apertures of the plurality of second adsorption holes at the exit of the vacuum plate along the flow direction is at least greater than or equal to half the length of the sanitary napkin. This is more conducive to solving the warping phenomenon of the sanitary napkin body existing in the prior art, thereby ensuring the stable transmission of the sanitary napkin product, and further improving the folding accuracy of the wings / wings and tail wings. It should be noted that the wings / wings and tail wings in this article refer to two situations where only wings exist or wings and tail wings exist at the same time.

[0042] In some embodiments of the present application, the folding portion is arranged at the entrance of the contoured curved surface portion, for making the sanitary napkin enter a folded state in advance; the shaping portion is arranged at the exit of the contoured curved surface portion, for shaping the folded wings after folding.

[0043] In some embodiments of the present application, the profiling portion is configured to perform arc twisting from the folding portion arranged parallel to the base to the shaping portion arranged parallel to the base, wherein the relative twisting angle between the folding portion and the shaping portion is 180 degrees in total; after the folding is completed, the side of the wing that contacts the supporting surface of the folding portion is pressed by the shaping portion. In this way, it can be achieved that within the region of the profiling portion along the process direction, a pair of wings (or a pair of wings and a pair of tail wings) of the sanitary napkin are gradually folded from both sides of the sanitary napkin along the width direction toward one side of the sanitary napkin body. In other words, the profiling portion at least plays a role of gradual folding. The folding portion of the profiling portion is set to prepare in advance the wings (or wings and tail wings) to be folded, and the shaping portion of the profiling portion is set to shape the folded wings (or wings and tail wings) after folding.

[0044] In some embodiments of the present application, the shaping part is arranged in parallel with the conveyor belt of the folding device, and the spacing between the shaping part and the conveyor belt in the height direction is a first spacing, and the first spacing is configured to match the thickness of the sanitary napkin with folded wings. Such a configuration can prevent the folded wings (or wings and tail wings) from loosening (i.e., spreading out) in the opposite direction of folding, thereby improving the folding size and accuracy of the wings (or wings and tail wings).

[0045] In some embodiments of the present application, the sanitary napkin also includes a tail wing, which is arranged on both sides of the main body along the width direction; the base is used to support the guard wings and the tail wing; the contoured portion is used to gradually fold the guard wings and the tail wing from both sides of the sanitary napkin along the width direction toward the main body side of the sanitary napkin.

[0046] The embodiment of the present application also provides a folding system, which includes: the folding device described in the above embodiment of the present application, which is located in the first process path and is used to fold at least the wings located on both sides of the sanitary napkin along the width direction toward the main body of the sanitary napkin along a preset size; a conveying device and a cutting device, which are arranged in the second process path; the conveying device is located on the upstream side of the cutting device and is used to convey continuous release paper material; the cutting device is used to cut the release paper material into release paper sheets, and convey and at least attach them to the position of the folded wings.

[0047] In some embodiments of the present application, the interior of the conveying device has a vacuum adsorption structure for adsorbing the release paper material under negative pressure and conveying the release paper material to the cutting device.

[0048] In some embodiments of the present application, the cutting device includes a cutting roller and a bottom roller arranged opposite to each other, the outer peripheral surface of the cutting roller has a blade, and the bottom roller is provided with a bottom knife, when the blade of the cutting roller is tangent to the bottom knife of the bottom roller, the release paper material is at least cut into a first release paper sheet; the bottom roller is connected to an adsorption device, the interior of the bottom roller is an adsorption structure, and the outer peripheral surface of the bottom roller has at least a through hole corresponding to the first release paper sheet.

[0049] In some embodiments of the present application, the folding system further includes a gluing device, which is located on the upstream side of the conveying device and is used to glue the release paper material.

[0050] In some embodiments of the present application, the folding system further comprises a pressing roller for pressing the bottom roller of the cutting device so that the release paper sheet is at least attached to the wings of the sanitary napkin.

[0051] In some embodiments of the present application, the folding system further comprises an air blowing device, which is located at the entrance of the contoured curved surface portion and is arranged along the process direction.

[0052] In some embodiments of the present application, the blowing device includes a blowing rod, the outer peripheral surface of which is provided with blowing holes, and the blowing rod is connected to an external air source, and is used to blow air to the wing at least before the wing enters the contoured portion of the contoured curved surface portion, so as to keep the wing flat along the width direction.

[0053] In some embodiments of the present application, the sanitary napkin also includes a tail wing, which is arranged on both sides of the main body along the width direction; the folding device is used to fold the wings and the tail wing located on both sides of the sanitary napkin along the width direction toward the main body of the sanitary napkin along a preset size; the cutting device is used to cut the release paper material into a first release paper sheet and a second release paper sheet, and transport and attach them to the positions of the folded wings and the tail wing accordingly.

[0054] The following will describe in detail a folding device and a folding system having the folding device provided in the embodiments of the present application. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0055] An embodiment of the present application provides a folding device and a folding system having the folding device, which can be used to fold the wings / wings and tail wings of a sanitary napkin.

[0056] like Figure 1 As shown, the sanitary napkin W formed by the upstream side moves toward the downstream side along the process direction. Figure 1 In the illustrated embodiment, the flow direction is from right to left. Of course, in other embodiments, the flow direction may be from left to right, depending on the actual situation.

[0057] The sanitary napkin W in this embodiment comprises a body W1 with an absorbent structure and a pair of wings W2 arranged on both sides of the body W1 in the width direction, wherein the body W1 with an absorbent structure is used to absorb excrement, and along the thickness direction, the sanitary napkin body W1 is composed of structures such as a liquid-permeable surface layer, a conductive layer and an absorbent core (the above arrangement sequence is carried out along the direction from the skin side to the non-skin side), which is not shown in the figure. Among them, the absorbent core can be mixed with fluff pulp fibers and highly absorbent resin particles, or a composite core structure can be used. Therefore, the body W1 of the sanitary napkin W usually has a certain thickness. The wings W2 of the sanitary napkin W include a leakproof material layer and a liquid-impermeable bottom layer, wherein the leakproof material layer is generally a water-repellent non-woven fabric, and the liquid-impermeable bottom layer is generally a waterproof film, therefore, the wings W2 can be composed of two layers of material, so that the thickness of the wings W2 is relatively thin (relative to the thickness of the body W1). Such a sanitary napkin is usually called a daily sanitary napkin. In this embodiment, by using a folding system, a pair of wings W2 located on both sides of the sanitary napkin W along the width direction can be folded along a predetermined size toward one side of the sanitary napkin body W1 (the middle part of the sanitary napkin body W1) along the process direction, and then the continuous release paper material is cut into a first release paper sheet S1 (which is also called a wing release paper sheet) and transported and attached to the position of the folded wings W2 accordingly.

[0058] Another embodiment of the present application provides a folding device and a folding system having the folding device, which can also be used to fold the wings and tail wings of a sanitary napkin.

[0059] like Figure 2 As shown, the sanitary napkin W formed by the upstream side moves toward the downstream side along the process direction. Figure 2 In the illustrated embodiment, the flow direction is from right to left.

[0060] The sanitary napkin W in this embodiment includes a body W1 with an absorbent structure and a pair of wings W2 and a pair of tail wings W3 arranged on both sides of the body W1 along the width direction, wherein the tail wings W3 are fan-shaped, and the length of this type of sanitary napkin is relatively long. Such sanitary napkins are usually called night sanitary napkins. In this embodiment, by using a wrapping and folding system, along the process direction, a pair of wings W2 and a pair of tail wings W3 located on both sides of the sanitary napkin W along the width direction can be wrapped and folded along a predetermined size toward one side of the sanitary napkin body W1 (i.e., the middle part of the sanitary napkin body), and then the continuous release paper material is cut into a first release paper sheet S1 (which is also called a wing release paper sheet) and a second release paper sheet S2 (which is also called a tail release paper sheet), and are transported and attached to the positions of the folded wings W2 and tail wings W3 accordingly.

[0061] An embodiment of the present application provides a folding system 1000, such as Figure 3As shown, the folding system 1000 includes a folding device 1, a conveying device 2, a cutting device 3, a gluing device 4, a pressing roller 5 and an air blowing device 6. Figure 1 The pair of wings W2 of the sanitary napkin W (i.e., daily sanitary napkin) shown in the figure performs the wrapping and folding operation, and can also be used as Figure 2 The pair of wings W2 and the pair of tail wings W3 of the sanitary napkin W with fan-shaped tail wings (ie, night-time sanitary napkin) shown in the figure are wrapped and folded. In this embodiment, the wrapping and folding of the wings W2 and the tail wings W3 of the sanitary napkin W for night-time use will be described.

[0062] Specifically, the folding device 1 is located in the first process path (i.e., the main process path), and is used to fold the wings W2 and the tail wing located on both sides of the sanitary napkin W along the width direction toward one side of the body W1 of the sanitary napkin W along a predetermined size. The conveying device 2 and the cutting device 3 are arranged in the second process path (i.e., the secondary process path). Among them, the conveying device 2 is located on the upstream side of the cutting device 3. The conveying device 2 is used to convey the continuously pulled release paper material S. The cutting device 3 is used to cut the continuous release paper material S into a first release paper sheet S1 (i.e., the wing release paper sheet) and a second release paper sheet S2 (i.e., the tail wing release paper sheet) according to a predetermined size, and transfer them to the positions of the folded wings W2 and the tail wing W3 accordingly to complete the attachment operation.

[0063] like Figure 3 , Figure 4 and Figure 5 As shown, the wrapping and folding device 1 includes a vacuum box 11 with a hollow structure, a first roller 12, a second roller 13, a driving roller 14, a vacuum plate 15, a conveyor belt 16 and a folding plate 17.

[0064] Specifically, the vacuum box 11 is connected to an adsorption device, which is a negative pressure device, so that the interior of the vacuum box 11 is filled with negative pressure gas. The vacuum plate 15 is arranged on the conveying surface of the vacuum box 11. In this embodiment, the conveying surface of the vacuum box 11 is the upper surface of the vacuum box 11. The first roller 12 is located on the upstream side of the vacuum box 11, and the second roller 13 is located on the downstream side of the vacuum box 11. The conveyor belt 16 is annularly wound around the outer circumference of the first roller 12, the second roller 13 and the driving roller 14, wherein the driving roller 14 is used to provide a driving force to drive the conveyor belt 16 to do a circular motion, thereby completing the conveying operation of the sanitary napkin W. Further, in this embodiment, the vacuum box 11 is arranged inside the conveyor belt 16, the conveyor belt 16 is arranged above the vacuum plate 15 and attached to the conveying surface of the vacuum plate 15, and the conveyor belt 16 is used to convey the sanitary napkin W from the upstream side to the downstream side.

[0065] The vacuum plate 15 is evenly provided with a plurality of first adsorption holes 151 on both sides along the width direction, and the vacuum plate 15 further includes a plurality of second adsorption holes 152 along the flow direction. Along the flow direction, the plurality of second adsorption holes 152 are at least provided at the inlet of the vacuum plate 15 and at the outlet of the vacuum plate 15, and along the width direction, the plurality of second adsorption holes 152 are located between the plurality of first adsorption holes 151 on both sides of the vacuum plate 15 along the width direction. Figure 5 and Figure 6 As shown, the arrangement of the first adsorption holes 151 and the second adsorption holes 152 matches the shape of the body W1 of the sanitary napkin W, and the conveyor belt 16 is provided with openings (not shown) matching the plurality of first adsorption holes 151 and the plurality of second adsorption holes 152. Negative pressure gas flows from the inside of the vacuum box 11 through the vacuum plate 15 and the conveyor belt 16, thereby adsorbing the body W1 of the sanitary napkin W on the conveyor belt 16 and conveying it.

[0066] Figure 5 It is an example diagram of the vacuum plate 15, and shows a hole-opening method of the vacuum plate 15. In this embodiment, a plurality of second adsorption holes 152 are only provided at the inlet T1 of the vacuum plate 15 and the outlet T2 of the vacuum plate 15. The inlet T1 of the vacuum plate 15 here refers to the upstream side position where the sanitary napkin W enters the wrapping and folding device 1. The sum of the apertures of the plurality of second adsorption holes 152 located at the inlet T1 of the vacuum plate 15 along the flow direction is at least greater than or equal to half of the length of the sanitary napkin W, and the sum of the apertures of the plurality of second adsorption holes 152 located at the outlet T2 of the vacuum plate 15 along the flow direction is at least greater than or equal to half of the length of the sanitary napkin W. In this way, it can be effectively ensured that the middle part of the body W1 of the sanitary napkin W is stably adsorbed during the inlet and outlet transmission process, thereby ensuring the stability of the transmission. The outlet T2 of the vacuum plate 15 here refers to the downstream position after the wing W2 of the sanitary napkin W is folded, that is, along the process direction, extending from the shaping part 1723 (described below) of the folding plate 17 to the downstream side, which can effectively ensure that the middle part of the main body W1 of the sanitary napkin W is stably adsorbed when it is conveyed to the outlet position, thereby ensuring the stability of the conveyance.

[0067] Figure 6 1 is another example diagram of the vacuum plate 15, and shows another opening method of the vacuum plate 15. In this embodiment, in addition to setting a plurality of second adsorption holes 152 at the inlet and outlet of the vacuum plate 15, a plurality of second adsorption holes 152 are evenly set on the entire vacuum plate 15 along the process direction, thereby effectively ensuring that the middle part of the body W1 of the sanitary napkin W is adsorbed during the entire conveying process, thereby ensuring the stability of the conveying.

[0068] Return to Reference Figure 3 and Figure 4 , and combined with Figure 7As shown, the folding plates 17 in the folding system 1000 are a pair, which are respectively located on both sides of the vacuum box 11 along the width direction. Specifically, the folding plate 17 includes a base 171 and a contoured curved surface 172, the contoured curved surface 172 is located on the downstream side of the base 171, and the contoured curved surface 172 protrudes from the base 171 along the height direction. Among them, the base 171 is used to support the guard wing W2 and the tail wing W3 to facilitate subsequent folding. The contoured curved surface 172 extends along the process direction, and is gradually folded from the upstream side end to the downstream side end. It should be noted that the process direction, the width direction and the height direction (or the thickness direction) are orthogonal to each other, that is, perpendicular to each other.

[0069] Further, the contoured curved surface portion 172 includes a folding portion 1721 disposed on the upstream side and a shaping portion 1723 disposed on the downstream side, and a contouring portion 1722 disposed between the folding portion 1721 and the shaping portion 1723. In this embodiment, the folding portion 1721 is disposed horizontally, and the shaping portion 1723 is also disposed horizontally. The contouring portion 1722 is used to perform arc twisting from the folding portion 1721 to the shaping portion 1723. Figure 4 As shown, the folding portion 1721 in a horizontal state is twisted outward to the shaping portion 1723 in a horizontal state, so that the profiling portion 1722 realizes an arc-shaped twisting transition from one horizontal state to another horizontal state. When the positive direction of the X-axis is defined as -90°, the negative direction of the X-axis is defined as +90°, and the positive direction of the Y-axis is defined as 0°, the folding portion 1721 in -90° is twisted outward to the shaping portion 1723 in 90°, so that the profiling portion 1722 realizes an arc-shaped twisting transition from -90° to +90°, and the relative twisting angle between the folding portion 1721 and the shaping portion 1723 is 180° in total, so that the pair of wings W2 and the pair of tail wings W3 of the sanitary napkin W are gradually folded from both sides of the sanitary napkin W in the width direction toward one side of the body W1 of the sanitary napkin W (i.e., the middle part of the sanitary napkin body W1) in the area of ​​the profiling portion 1722 along the flow direction. In other words, the contoured portion 1722 at least plays a role of gradual folding.

[0070] Figure 8 This is an exemplary three-dimensional diagram of the folding plate 17 in the wrapping and folding system provided in the embodiment of the present application. The folding plate 17 shown in this figure is only an example. It is worth noting that it is not necessarily exactly the same as the folding plate 17 shown in other figures. Figure 8 As shown, the folding portion 1721 is the entrance T1 of the contoured curved surface portion 172, and the shaping portion 1723 is the exit T2 of the contoured curved surface portion 172. The folding portion 1721 is used to make the sanitary napkin W enter the folded state in advance (i.e., folding preparation), and the shaping portion 1723 is used to shape the folded wings W2 and tail wings W3 after folding (i.e., fix them after folding).

[0071] Furthermore, the shaping portion 1723 is horizontally arranged, and is arranged parallel to the conveyor belt 16 of the folding device 1, and the distance between the two in the height direction is a first distance α, such as Figure 4 As shown, the first spacing α is configured to match the thickness of the sanitary napkin W with the folded wings W2. It should be noted that the shaping portion 1723 is parallel to the base 171 of the folding plate 17, and the base 171 of the folding plate 17 is parallel to the conveyor belt 16, so the shaping portion 1723 is parallel to the conveyor belt 16. Since the first spacing α is configured to match the thickness of the sanitary napkin W with the folded wings W2 and the tail wing W3, it is possible to prevent the folded wings W2 and the tail wing W3 from loosening (i.e., spreading out) in the opposite direction of the folding, thereby effectively improving the folding size and accuracy of the wings W2 and the tail wing W3. It is worth noting that in this embodiment, a sanitary napkin W with wings W2 and tail wing W3 (i.e., a night sanitary napkin) is used as an example for explanation. Similarly, the folding system 1000 provided in the embodiment of the present application can also be applied to a sanitary napkin W with only wings W2 (i.e., a daily sanitary napkin), and the above-mentioned effect can also be obtained.

[0072] Return to Reference Figure 3 As shown, in this embodiment, the interior of the conveying device 2 has a vacuum adsorption structure for adsorbing the continuously pulled release paper material S under the action of negative pressure to perform the conveying operation and convey the release paper material S to the cutting device 3.

[0073] Furthermore, the folding system 1000 also includes a gluing device 4, which is located on the upstream side of the conveying device 2 and is used to glue the release paper material S. In this embodiment, since the wings W2 and the tail wing W3 need to be attached, the gluing device 4 can be set with two gluing sizes according to the distance between the two workstations corresponding to the wings W2 and the tail wing W3. The workstation corresponding to the wings W2 here can be used to perform the operation of attaching the wings W2, and the workstation corresponding to the tail wing W3 can be used to perform the operation of attaching the tail wing W3. Of course, in some other embodiments, two gluing devices 4 can also be set at the two workstations corresponding to the wings W2 and the tail wing W3, respectively.

[0074] Continue reading Figure 3As shown, the cutting device 3 includes a cutting roller 31 and a bottom roller 32 which are arranged opposite to each other. Specifically, the outer peripheral surface of the cutting roller 31 has a blade (not shown in the figure), and the bottom roller 32 is provided with a bottom knife (not shown in the figure). When the blade of the cutting roller 31 is tangent to the bottom knife of the bottom roller 32, the release paper material S is cut into a first release paper sheet S1 (i.e., a wing release paper sheet) and a second release paper sheet S2 (i.e., a tail wing release paper sheet). The blade of the cutting roller 31 and the bottom knife of the bottom roller 32 need to be set according to the sizes of the above two workstations. The bottom roller 32 is connected to an adsorption device (not shown in the figure), the interior of the bottom roller 32 is an adsorption structure, and the outer peripheral surface of the bottom roller 32 has through holes corresponding to the first release paper sheet S1 and the second release paper sheet S2. After the release paper material S is cut into the first release paper sheet S1 and the second release paper sheet S2, the first release paper sheet S1 and the second release paper sheet S2 are respectively adsorbed on the surface of the bottom roller 32, and rotate with the bottom roller 32 to the positions corresponding to the wings W2 and the tail wings W3 of the folded sanitary napkin W.

[0075] In order to better fix the first release paper sheet S1 and the second release paper sheet S2 on the wings W2 and the tail wing W3 of the sanitary napkin W, respectively, the folding system 1000 provided in the embodiment of the present application further includes a pressing roller 5. When the outer surface of the pressing roller 5 is tangent to the outer surface of the bottom roller 32 of the cutting device 3, the pressing roller 5 is used to press the bottom roller 32 so that the first release paper sheet S1 and the second release paper sheet S2 coated with glue are correspondingly attached to the wings W2 and the tail wing W3 of the folded sanitary napkin W.

[0076] In addition, in order to better wrap and fold the wings W2 and the tail wing W3, the wrapping and folding system 1000 provided in the embodiment of the present application also includes a blowing device 6, which is located at the entrance T1 of the contoured curved surface portion 172 and is arranged along the process direction. Specifically, the blowing device 6 includes a blowing rod, and the outer peripheral surface of the blowing rod is provided with a blowing hole. The blowing rod is connected to an external air source (not shown in the figure), and the blowing rod is used to blow air to a pair of wings W2 and a pair of tail wings W3 of the sanitary napkin W before the wings W2 and the tail wing W3 enter the contoured portion 1722 of the contoured curved surface portion 172, so that the wings W2 and the tail wing W3 remain flat along the width direction without corner folding, so as to enter the wrapping and folding state in a better state.

[0077] The folding device 1 and the folding system 1000 provided by the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A folding device, used in the manufacture of sanitary napkins, the sanitary napkin comprising a body with an absorbent structure and wings arranged on both sides of the body along the width direction, characterized in that: The wrapping and folding device comprises: The vacuum box has a hollow structure and is connected to the adsorption device; A vacuum plate is arranged on the conveying surface of the vacuum box; the vacuum plate comprises a plurality of first adsorption holes arranged along the process direction, and the plurality of first adsorption holes are arranged on both sides of the vacuum plate along the width direction; the vacuum plate further comprises a plurality of second adsorption holes arranged along the process direction; along the process direction, the plurality of second adsorption holes are arranged at least at the inlet of the vacuum plate and at the outlet of the vacuum plate; along the width direction, the plurality of second adsorption holes are located between the plurality of first adsorption holes on both sides of the vacuum plate along the width direction; A conveyor belt, arranged above the vacuum plate, the conveyor belt having openings corresponding to the first adsorption holes and the second adsorption holes of the vacuum plate, for conveying the sanitary napkin from an upstream side to a downstream side; A pair of folding plates are respectively arranged on both sides of the vacuum box along the width direction, the folding plates include a base and a contoured curved surface portion, the contoured curved surface portion is located on the downstream side of the base, and the contoured curved surface portion protrudes from the base along the height direction; the base is used to at least support the wings of the sanitary napkin; the contoured curved surface portion extends along the flow direction and is gradually folded from the upstream side end to the downstream side end, wherein the width direction is perpendicular to the flow direction, and the width direction is perpendicular to the height direction; the contoured curved surface portion includes a folding portion and a shaping portion respectively arranged on the upstream side and the downstream side, and a shaping portion arranged between the folding portion and the shaping portion, the shaping portion is used to gradually fold at least the wings from both sides of the sanitary napkin along the width direction toward the main body side of the sanitary napkin.

2. The folding device according to claim 1, characterized in that: The folding device also includes a first roller, a second roller and a driving roller; the first roller is located on the upstream side of the vacuum box, the second roller is located on the downstream side of the vacuum box, and the conveyor belt is annularly wound around the circumference of the first roller, the second roller and the driving roller, wherein the driving roller is used to provide driving force to drive the conveyor belt to perform circular motion.

3. The folding device according to claim 1, characterized in that: The sum of the apertures of the multiple second adsorption holes located at the entrance of the vacuum plate along the flow direction is at least greater than or equal to half of the length of the sanitary napkin; the sum of the apertures of the multiple second adsorption holes located at the exit of the vacuum plate along the flow direction is at least greater than or equal to half of the length of the sanitary napkin.

4. The folding device according to claim 1, characterized in that: The folding portion is arranged at the entrance of the contoured curved surface portion, and is used to make the sanitary napkin enter the folded state in advance; the shaping portion is arranged at the exit of the contoured curved surface portion, and is used to shape the folded wings after folding.

5. The folding device according to claim 4, characterized in that: The contoured portion is configured to perform an arc-shaped twist from the folding portion arranged parallel to the base to the shaping portion arranged parallel to the base, wherein the relative twisting angle between the folding portion and the shaping portion is 180 degrees in total; after the folding is completed, the side of the wing that is in contact with the supporting surface of the folding portion is pressed by the shaping portion.

6. The folding device according to claim 1, characterized in that: The shaping portion and the conveyor belt of the folding device are arranged in parallel, and the spacing between the shaping portion and the conveyor belt in the height direction is a first spacing, and the first spacing is configured to match the thickness of the sanitary napkin with folded wings.

7. The folding device according to claim 1, characterized in that: The sanitary napkin also includes a tail wing, which is arranged on both sides of the main body along the width direction; the base is used to support the wings and the tail wing; the contoured portion is used to gradually fold the wings and the tail wing from both sides of the sanitary napkin along the width direction toward the main body side of the sanitary napkin.

8. A wrapping and folding system, characterized in that: include: The folding device according to claim 1, wherein the folding device is located in the first flow path and is used to fold at least the wings located on both sides of the sanitary napkin along the width direction toward the main body of the sanitary napkin along a preset size; A conveying device and a cutting device are arranged in the second process path; the conveying device is located on the upstream side of the cutting device, and is used to convey the continuous release paper material; the cutting device is used to cut the release paper material into release paper sheets, and convey and at least attach them to the position of the folded wings.

9. The folding system according to claim 8, characterized in that: The conveying device has a vacuum adsorption structure inside, which is used to adsorb the release paper material under the action of negative pressure and convey the release paper material to the cutting device.

10. The folding system according to claim 8, characterized in that: The cutting device comprises a cutting roller and a bottom roller which are arranged opposite to each other, the outer peripheral surface of the cutting roller has a blade, and the bottom roller is provided with a bottom knife, when the blade of the cutting roller is tangent to the bottom knife of the bottom roller, the release paper material is at least cut into a first release paper sheet; the bottom roller is connected to an adsorption device, the interior of the bottom roller is an adsorption structure, and the outer peripheral surface of the bottom roller has at least a through hole corresponding to the first release paper sheet.

11. The folding system according to claim 8, characterized in that: The folding system further comprises a gluing device, which is located at the upstream side of the conveying device and is used for gluing the release paper material.

12. The folding system according to claim 8, characterized in that: The folding system further comprises a pressing roller for pressing the bottom roller of the cutting device so that the release paper sheet is at least attached to the wings of the sanitary napkin.

13. The folding system according to claim 8, characterized in that: The wrapping and folding system further comprises an air blowing device, which is located at the entrance of the contoured curved surface portion and is arranged along the process direction.

14. The folding system according to claim 13, characterized in that: The blowing device includes a blowing rod, the outer peripheral surface of which is provided with blowing holes. The blowing rod is connected to an external air source and is used to blow air to the wing at least before the wing enters the contoured portion of the contoured curved surface portion so as to keep the wing flat along the width direction.

15. The folding system according to claim 8, characterized in that: The sanitary napkin also includes a tail wing, which is arranged on both sides of the main body along the width direction; the folding device is used to fold the wings and the tail wing located on both sides of the sanitary napkin along the width direction toward the main body of the sanitary napkin along a preset size; the cutting device is used to cut the release paper material into a first release paper sheet and a second release paper sheet, and transport and attach them to the positions of the folded wings and the tail wing accordingly.

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