METHOD FOR MANUFACTURING SCREEN FORMING BODY FOR FIBER STORAGE Drum, AND FIBER STORAGE Drum USING SCREEN FORMING BODY

Abstract

The invention provides a manufacturing method of a screen forming body for a fiber accumulation drum and the fiber accumulation drum with the screen forming body, wherein the screen and a reinforcing member are easily and firmly connected and are high in reliability. The manufacturing method of the screen forming body (200) used for the fiber accumulation drum (100) comprises the steps of preparing a flat-plate-shaped screen (210b) with a plurality of first holes (212); a step for preparing a flat reinforcing member (220b) in which a plurality of second holes (222) are formed; a step for joining and integrating the flat-plate-shaped screen and the flat-plate-shaped reinforcing member surfaces; and a step for bending and forming the integrated screen and reinforcing member into an arc shape.

Description

Technical Field

[0001] The present invention relates to a mesh forming body, and more particularly to a mesh forming body used for a fiber accumulation drum used in the manufacture of an absorbent body. In addition, the present invention relates to a fiber accumulation drum using the mesh forming body. Background Art

[0002] Conventionally, there is known an absorbent manufacturing apparatus using a fiber accumulation drum. The fiber accumulation drum is a rotating drum having a plurality of molding dies for molding the absorbent on its outer peripheral surface. In the absorbent manufacturing apparatus, after the absorbent material to be the raw material of the absorbent is stacked in the molding dies of the fiber accumulation drum, the stacked absorbent material is demolded from the molding dies, thereby manufacturing the absorbent.

[0003] The molding die used for the fiber drum includes a permeable member (screen) disposed at the opening of the outer peripheral surface of the fiber drum. Since the permeable member is subjected to external forces in opposite directions when the absorbent material is stacked and when the absorbent material is demolded, the permeable member may be deformed and fatigued when used alone.

[0004] In this regard, Patent Document 1 (Japanese Invention Patent No. 5210914) describes that in order to suppress the deformation of a breathable component, a plurality of first wires and a plurality of second wires that cross each other are connected at their intersections to form a mesh body, and the mesh body is used as a reinforcing member. In particular, the intersection portion of the high-rigidity first wire and second wire in the mesh body is joined to the breathable component, thereby suppressing the deformation of the breathable component.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent No. 5210914 Summary of the invention

[0008] Problems to be solved by the invention

[0009] However, as described in Patent Document 1 (Japanese Invention Patent No. 5210914), when a mesh body of a first wire and a second wire is used as a reinforcing member and the intersection portion of the first wire and the second wire is joined to a breathable member, the joining portion between the reinforcing member and the breathable member is discontinuous, and therefore, the reinforcing member and the breathable member may not be firmly joined.

[0010] In addition, as described in Patent Document 1 (Japanese Invention Patent No. 5210914), when a grid body composed of a plurality of components (a plurality of first wires and a plurality of second wires) is used as a reinforcing component, there is a possibility that the distribution of the joint between the air-permeable component and the reinforcing component is uneven. If the distribution of the joint between the air-permeable component and the reinforcing component is uneven, the reinforcing component and the air-permeable component may not be firmly joined.

[0011] In addition, although the air-permeable member and the reinforcing member are formed into an arc shape in a manner corresponding to the shape of the outer peripheral surface of the fiber accumulation drum after being joined, if the reinforcing member and the air-permeable member are not firmly joined due to the above-mentioned reasons, undesirable conditions such as the air-permeable member and the reinforcing member becoming detached from the joint may occur during the bending process.

[0012] Means for solving problems

[0013] The method for manufacturing a screen forming body of the present invention is a method for manufacturing a screen forming body for a fiber accumulation drum. The method for manufacturing a screen forming body comprises: a process of preparing a flat screen having a plurality of first holes; a process of preparing a flat reinforcing member having a plurality of second holes; a process of integrating the flat screen and the flat reinforcing member by surface bonding; and a process of bending the integrated screen and reinforcing member into an arc shape.

[0014] The fiber accumulation drum of the present invention comprises a screen forming body, which comprises: a plate-shaped screen having a plurality of first holes formed therein; and a plate-shaped reinforcing member having a plurality of second holes formed therein and integrated with the screen by surface bonding.

[0015] Effects of the Invention

[0016] In the manufacturing method of the screen forming body of the present invention, since the flat screen is joined to the flat reinforcing member surface, the screen and the reinforcing member can be firmly joined compared to the case where the reinforcing member is joined to the screen at points. Therefore, in the bending process after the screen and the reinforcing member are integrated, the occurrence of undesirable conditions such as the joining of the screen and the reinforcing member falling off can be suppressed.

[0017] Furthermore, in the fiber accumulation drum of the present invention, since a screen forming body in which the screen and the reinforcing member are surface-joined is used, the screen can be firmly supported by the reinforcing member, and the life of the screen can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of an apparatus for manufacturing an absorbent body including a fiber accumulation drum according to one embodiment of the present invention.

[0019] Figure 2It is a schematic exploded perspective view of a fiber accumulation drum according to an embodiment of the present invention.

[0020] Figure 3 yes Figure 2 An exploded perspective view of the forming mold of the fiber accumulation drum.

[0021] Figure 4 yes Figure 3 Schematic diagram of a flat-plate-shaped screen with first holes formed in a screen forming body of a molding die before being joined to a reinforcing member surface.

[0022] Figure 5 yes Figure 3 A schematic diagram of a flat plate-shaped reinforcing member having a second hole formed therein before being joined to the screen surface of a forming die.

[0023] Figure 6 Yes means Figure 3 A manufacturing flow chart of the manufacturing process of the screen forming body of the molding die. DETAILED DESCRIPTION

[0024] Hereinafter, embodiments of a method for manufacturing a screen forming body for a fiber accumulation drum according to the present invention and a fiber accumulation drum using the screen forming body will be described with reference to the drawings.

[0025] In addition, the following embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that various changes may be made to the following embodiments without departing from the spirit and scope of the present invention as described in the claims.

[0026] (1) Apparatus for manufacturing absorbent body

[0027] Reference Figure 1 to Figure 3 Next, a manufacturing apparatus 10 for an absorbent body A including a fiber accumulation drum according to one embodiment of the present invention will be described. Figure 1 1 is a schematic diagram of an apparatus 10 for manufacturing an absorbent body A including a fiber accumulation drum 100 according to an embodiment of the present invention. Figure 2 1 is a schematic exploded perspective view of the fiber accumulation drum 100 . Figure 3 It is an exploded perspective view of the molding die 110 of the fiber accumulation drum 100 .

[0028] The absorber A is used in, for example, disposable diapers or sanitary napkins, and is an article that absorbs body fluids such as urine and menstrual blood. The material of the absorber A is not limited, and is an article formed into a predetermined shape from an absorbent material such as pulp fiber.

[0029] The manufacturing device 10 of the absorbent body A mainly comprises: a fiber accumulation drum 100, a duct 20 and a suction conveyor 30 (see Figure 1 ).

[0030] The fiber accumulation drum 100 is a hollow cylindrical rotating drum. The outer periphery of the fiber accumulation drum 100 rotates in the direction of arrow R around a rotation axis O extending along the center of the cylindrical fiber accumulation drum 100 (see FIG. Figure 1 ).

[0031] The fiber accumulation drum 100 mainly includes a frame 130, a plurality of molding dies 110, and a partition wall 22 (see Figure 1 as well as Figure 2 ).

[0032] like Figure 2 As shown, the frame 130 includes a pair of annular frames 132 and a plurality of axial frames 134. The annular frames 132 are annular frames centered on the rotation axis O of the fiber accumulation drum 100. The pair of annular frames 132 are arranged to be separated from each other in the axial direction of the rotation axis O of the fiber accumulation drum 100. Each axial frame 134 extends in the axial direction of the rotation axis O of the fiber accumulation drum 100 and connects the pair of annular frames 132. An opening Op surrounded by the annular frames 132 and the axial frames 134 is formed in the frame 130. A plurality of molding dies 110 (see FIG. 1 ) are installed circumferentially on the outer peripheral surface of the frame 130 in a manner to block the opening Op. Figure 2 The molding die 110 is mounted on the outer peripheral surface of the frame 130 by welding, for example, but the mounting method of the molding die 110 to the frame 130 is not limited to welding. Figure 2 As shown, each molding die 110 is formed in an arc shape when viewed along the rotation axis O of the fiber accumulation drum 100 .

[0033] like Figure 3 As shown, each molding die 110 mainly includes a mold body 114 on a thick plate and a screen forming body 200. In each molding die 110, the mold body 114 is arranged on the outer side of the screen forming body 200 in the radial direction of the fiber accumulation drum 100. A through hole 114a is formed in the central part of the mold body 114, which penetrates the mold body 114 in the plate thickness direction (radial direction of the fiber accumulation drum 100). By forming the through hole 114a in the mold body 114, a recessed portion 112 (see FIG. 114 ) which is recessed toward the radial inner side of the fiber accumulation drum 100 and has the screen forming body 200 as the bottom is formed in each molding die 110. Figure 2 ). The shape of the recess 112 has a shape corresponding to the absorbent body A formed by the manufacturing device 10. Therefore, as described later, when the absorbent material stacked in the recess 112 is taken out from the recess 112, the taken out absorbent material has the shape of the desired absorbent body A. In addition, in the present embodiment, a single recess 112 is formed in each molding die 110, but it is not limited to this. For example, a plurality of recesses 112 may be formed in each molding die 110. In addition, the shape of the through hole 114a may not be Figure 2 The depicted rectangular shape may also be other shapes.

[0034] like Figure 3 As shown in FIG. 1 , the screen forming body 200 is a structure in which a plate-shaped screen 210 formed in an arc shape and a plate-shaped reinforcing member 220 formed in an arc shape are stacked in the radial direction of the fiber accumulation drum 100 and integrated by surface bonding. In the radial direction of the fiber accumulation drum 100, the screen 210 is arranged outside the reinforcing member 220. In the screen 210, a plurality of first holes 212 (see FIG. 1 ) are formed in a manner that penetrates the plate forming the screen 210. Figure 3 In the reinforcing member 220, a plurality of second holes 222 are formed so as to penetrate the plate forming the reinforcing member 220 (see Figure 3 Since the first hole 212 is formed in the screen 210 and the second hole 222 is formed in the reinforcing member 220, the screen forming body 200 can allow air to pass through in the thickness direction (radial direction of the fiber accumulation drum 100). The details of the screen forming body 200 and the manufacturing method of the screen forming body 200 will be described later.

[0035] By arranging the screen forming body 200 at the bottom of the recess 112 of the forming mold 110, the outside of the fiber accumulation drum 100 (the space outside the forming mold 110) and the inside of the fiber accumulation drum 100 (the space inside the forming mold 110) are connected via the screen forming body 200 at the bottom of the recess 112.

[0036] A plurality of spaces divided by partition walls 22 arranged inside the fiber accumulation drum 100 are formed along the circumferential direction of the fiber accumulation drum 100 (see FIG. Figure 1 As one of the multiple spaces, the suction space Si (refer to Figure 1 ) is a space from which the internal air is sucked out of an opening not shown in the figure, and is a space with a pressure lower than the external pressure of the fiber accumulation drum 100 (negative pressure). The suction space Si sucks air from the external space of the fiber accumulation drum 100 via the screen forming body 200 arranged adjacent to the radial outer side of the suction space Si. The blow-out space So (see Figure 1 ) is a space disposed adjacent to the suction space Si in the circumferential direction of the fiber accumulation drum 100, and in the rotation direction of the fiber accumulation drum 100 (refer to Figure 1 The blow-out space So is a space into which air is blown from an opening not shown in the figure, and is a space with a pressure higher than the external pressure of the fiber accumulation drum 100 (positive pressure). The blow-out space So blows air to the external space of the fiber accumulation drum 100 via the screen forming body 200 arranged adjacent to the radial outer side of the blow-out space So.

[0037] In addition, when the fiber accumulation drum 100 rotates, the frame 130 and the molding die 110 mounted on the frame 130 rotate, but the position of the space inside the fiber accumulation drum 100 does not change. Therefore, the space arranged inside each molding die 110 (on the rotation axis O side of the fiber accumulation drum 100) changes with the rotation of the fiber accumulation drum 100. More specifically, when the fiber accumulation drum 100 rotates, each molding die 110 passes through the outside of the blowing space So after passing through the outside of the suction space Si, and if it rotates further, it passes through the outside of the suction space Si again.

[0038] The duct 20 forms a supply space Sa (see FIG. 1 ) on the radially outer side of the fiber accumulation drum 100, which surrounds at least a portion of the suction space Si inside the fiber accumulation drum 100. Figure 1 ). Air 24 containing absorbent material is supplied to the supply space Sa from an opening not shown in the figure. When the fiber accumulation drum 100 rotates around the rotation axis O and a certain molding die 110 moves in the supply space Sa, the air 24 containing absorbent material supplied to the supply space Sa flows into the recess 112 of the molding die 110 moving in the supply space Sa, and flows into the suction space Si having a lower pressure than the supply space Sa via the screen forming body 200. In addition, as described later, since a first hole 212 with a small diameter is formed in the screen 210 of the screen forming body 200, the absorbent material contained in the air 24 does not flow into the suction space Si. Therefore, the absorbent material contained in the air 24 does not pass through the screen 210, but is layered in the recess 112 of the molding die 110.

[0039] The suction conveyor 30 is disposed adjacent to the blowing space So inside the fiber accumulation drum 100 via the molding die 110 (see Figure 1 The suction conveyor 30 is arranged on the downstream side of the duct 20 (see arrow R) in the rotation direction of the fiber accumulation drum 100. Figure 1 ).like Figure 1 As shown by the middle arrow, the suction conveyor 30 is a conveyor that sucks air from the conveyor surface (conveying surface). The suction conveyor 30 sucks the absorbent material (absorbent body A) stacked on the concave portion 112 of the forming mold 110 when the forming mold 110 moves in the supply space Sa, demolds the absorbent body A from the concave portion 112 of the forming mold 110, and conveys the demolded absorbent body A. The absorbent body A conveyed by the suction conveyor 30 is conveyed to the subsequent process and used for disposable diapers, sanitary napkins, etc.

[0040] (2) Screen forming body

[0041] As described above, the mesh forming body 200 is a structure in which the arc-shaped plate-shaped mesh 210 and the arc-shaped plate-shaped reinforcement member 220 are radially layered and integrated by surface bonding.

[0042] Here, refer to Figures 4 to 6 , a method for manufacturing the mesh forming body 200, a manufacturing process of the mesh forming body 200, and the structure and shape of the mesh and the reinforcing member in the mesh forming body 200 as a finished product are described. Figure 4 1 is a schematic diagram of a flat-plate-shaped mesh 210 b (before bending) in which first holes 212 are formed, before the mesh forming body 200 is surface-joined with the reinforcing member 220 . Figure 5 1 is a schematic diagram of a flat plate-shaped reinforcing member 220 b (before bending) in which second holes 222 are formed, before being surface-joined with the mesh 210 of the mesh forming body 200 . Figure 6 1 is a manufacturing flow chart showing the manufacturing process of the screen forming body 200 .

[0043] like Figure 6 As shown, the manufacturing method of the screen forming body 200 mainly comprises: a process of preparing a flat screen 210b having a plurality of first holes 212 (step S1); a process of preparing a flat reinforcing member 220b having a plurality of second holes 222 (step S2); a process of integrating the flat screen 210b and the flat reinforcing member 220b by surface bonding (step S3); and a process of bending the integrated screen 210b and the reinforcing member 220b to form an arc shape (step S4). These steps S1 to S4 are described below.

[0044] In addition, here, step S1 and step S2 are described in the order of step S1 and step S2, but the order of these steps S1 and S2 may be reversed or they may be performed simultaneously.

[0045] <Step S1>

[0046] The step of preparing the flat-plate-shaped mesh 210 b having a plurality of first holes 212 formed therein (step S1 ) will be described.

[0047] The flat plate-shaped mesh 210b having the first holes 212 is manufactured from the flat plate-shaped member 210a having no first holes 212. The flat plate-shaped member 210a is a rectangular member. Although the material is not limited, the flat plate-shaped member 210a is, for example, a member made of SUS.

[0048] Step S1 includes a process of forming a first hole 212 in the flat plate-shaped member 210 a .

[0049] As mentioned in the description of the manufacturing apparatus 10 of the absorbent body A, the first holes 212 are holes provided to allow air to pass without allowing the absorbent material to pass therethrough.

[0050] Therefore, the first hole 212 is formed small enough to prevent the absorbent material from passing through. For example, the first hole 212 is a circular hole with a diameter of 1 mm or less, more preferably about 0.2 to 0.5 mm. In addition, the shape of the first hole 212 is not limited to a circle, and may be other shapes.

[0051] In addition, in order to guide a sufficient amount of absorbent material to the concave portion 112 of the molding die 110, it is preferred to increase the opening ratio relative to the flat plate-shaped member 210a (the ratio of the total area of ​​the first holes 212 formed in the flat plate-shaped screen 210b to the area of ​​the flat plate-shaped member 210a). In other words, it is preferred to form a plurality of first holes 212 in the flat plate-shaped member 210a. In other words, it is preferred to form a plurality of first holes 212 as close to each other as possible on the flat plate-shaped member 210a.

[0052] Although the processing method is not limited, in order to form the first holes 212 of small diameter close to each other, the first holes 212 are formed on the flat member 210a by, for example, etching. When the first holes 212 are formed on the flat member 210a by etching, first, the area of ​​the flat member 210a corresponding to the area where the first holes 212 are not formed is masked with an anticorrosive agent, and then only the area corresponding to the first hole 212 is corroded by a chemical, thereby forming the first hole 212.

[0053] In addition, when the first hole 212 is formed by etching, it is difficult to form the first hole 212 in a flat plate-shaped member with a large plate thickness due to the characteristics of the processing method. Therefore, the thickness of the flat plate-shaped member 210a is preferably less than 1 mm, and more preferably 0.3 mm to 0.6 mm. In this way, when the screen 210 is formed with a thin flat plate-shaped member 210a, the screen 210 is easily deformed and may be fatigue-damaged. Therefore, here, the screen 210 is used as a screen forming body 200 combined with a reinforcing member 220.

[0054] <Step S2>

[0055] The step of preparing the flat plate-shaped reinforcing member 220 b in which the plurality of first holes 212 are formed (step S2 ) will be described.

[0056] The flat plate-shaped reinforcing member 220b having the second hole 222 is manufactured from the flat plate-shaped member 220a having no second hole 222. The flat plate-shaped member 220a is a rectangular member. Although the material is not limited, the flat plate-shaped member 220a is a member made of SUS, for example. The flat plate-shaped member 220a is a member for the purpose of reinforcing the screen 210, and therefore, the plate thickness of the flat plate-shaped member 220a is about several mm (for example, 3 to 5 mm), which is thicker than the flat plate-shaped member 210a.

[0057] Step S2 includes a process of forming the second hole 222 in the flat plate-shaped member 220 a .

[0058] Since the purpose of the second hole 222 is not to inhibit the passage of absorbent material, the second hole 222 is formed larger than the first hole 212. For example, although the numerical value is not limited, the second hole 222 is a rectangular hole with a length of 10 to 15 mm and a width of about 5 to 10 mm. In addition, here, the size of the second hole 222 in the circumferential extension direction of the fiber accumulation drum 100 when finally used in the screen forming body 200 is referred to as the width, and the size of the second hole 222 in the axial extension direction of the fiber accumulation drum 100 when finally used in the screen forming body 200 is referred to as the length. In addition, preferably, among the plurality of second holes 222, the width W1 of the second hole 222 (refer to Figure 5 ) are the same size. If the width W1 of the second hole 222 is made the same in the flat reinforcing member 220b, the widths of the plurality of second holes 222 in the reinforcing member 220 after the bending process are substantially the same. By making the widths of the second holes 222 the same, the ventilation resistance of the mesh forming body 200 can be easily made the same regardless of the location, and it becomes easy to manufacture an absorbent body of the same thickness using the fiber accumulation drum 100.

[0059] In addition, within the range that the flat reinforcing member 220b (actually, the reinforcing member 220 after bending) can meet the purpose of supporting the screen 210, the total area occupied by the second hole 222 of the flat reinforcing member 220b (in other words, the opening rate in the flat reinforcing member 220b) is preferably as high as possible.

[0060] In addition, the shape of the second hole 222 is not limited to the above-mentioned rectangular shape, and can also be a polygonal shape such as a triangle, a pentagon, or a hexagon. In addition, the shape of the second hole 222 can also be a circle, an ellipse, etc. In addition, in the case where the shape of the second hole 222 is other than a rectangular shape, within the range that the flat reinforcing member 220b can meet the purpose of supporting the screen 210, the opening rate in the flat reinforcing member 220b is preferably as high as possible.

[0061] Furthermore, in order to suppress the adverse effect of the presence of the reinforcing member 220 on the passage of air in the mesh forming body 200, the distance between adjacent second holes 222 is preferably as small as possible within the range that does not impair the purpose of supporting the mesh 210. For example, the distance d between adjacent second holes 222 (in other words, the width of the portion supporting the mesh 210, see Figure 5) is preferably about 0.3 to 0.7 mm. By setting the distance between adjacent second holes 222 to this value, the opening rate of the reinforcing member 220 (the ratio of the total area of ​​the second holes 222 formed in the flat reinforcing member 220b to the area of ​​the flat member 220a) can be increased, and when the fiber is accumulated on the fiber accumulation drum 100, the reinforcing member 220 can be prevented from causing a large ventilation resistance. On the other hand, since the distance between the second holes 222 formed in the flat reinforcing member 220b is ensured to be at least 0.3 mm, the screen 210 can be firmly supported by the reinforcing member 220.

[0062] Although the processing method is not limited, in order to form such a second hole 222, for example, the second hole 222 is formed in the flat plate-shaped member 220a by laser processing. By using laser processing, the reinforcing member 220 can be formed with good precision. As a result, as described later, when the screen 210 and the reinforcing member 220 are surface-joined, the screen 210 and the reinforcing member 220 will not be partially joined, and it is easy to suppress the occurrence of undesirable conditions such as the reduction of the joining strength of the portion.

[0063] In addition, laser processing is only an example of a processing method, and the second hole 222 may be formed by a processing method other than laser processing (e.g., stamping). However, for example, in stamping, burrs may be generated at the stamping portion. Therefore, compared with stamping, laser processing is easier to form the reinforcing member 220 with good accuracy.

[0064] <Step S3>

[0065] When the flat-plate mesh 210b is prepared in step S1 and the flat-plate reinforcing member 220b is prepared in step S2, the flat-plate mesh 210b and the flat-plate reinforcing member 220b are integrated (step S3).

[0066] In addition, although only a part of the reinforcing member 220b may be joined to the mesh 210b for integration, in such a structure, there is a possibility that the flat mesh 210b and the flat reinforcing member 220b may not be firmly joined.

[0067] Therefore, in the present disclosure, the flat mesh 210b and the flat reinforcement member 220b are integrated by surface bonding. In other words, the surface of the mesh reinforcement member 220b facing the mesh 210b is substantially entirely bonded to the mesh 210b.

[0068] Although the joining method is not limited, the flat screen 210b and the flat reinforcing member 220b are joined by diffusion joining, for example. Diffusion joining refers to a method of joining by utilizing the diffusion of atoms generated on the joining surface, by making the base materials close to each other and applying pressure to a degree that plastic deformation is minimized at a temperature below the melting point of the base materials. In addition, the surface joining method may also be normal temperature pressure joining, ultrasonic joining, forging, and the like.

[0069] <Step S4>

[0070] In step S3, after the flat screen 210b and the flat reinforcing member 220b are integrated, in step S4, the integrated flat screen 210b and the flat reinforcing member 220b are formed into an arc shape corresponding to the outer peripheral surface of the fiber accumulation drum 100 (the outer peripheral surface of the annular frame 132). Specifically, in step S4, the integrated flat screen 210b and the flat reinforcing member 220b are bent so that the shape of the surface of the reinforcing member 220 that does not contact the screen 210 matches the shape of the outer peripheral surface of the annular frame 132 of the fiber accumulation drum 100. For example, Figure 6 As depicted, this process forms the flat mesh 210b and the flat reinforcement member 220b into an arc shape by sandwiching the integrated flat mesh 210b and the flat reinforcement member 220b between a male die and a female die.

[0071] (3) Features

[0072] (3-1)

[0073] The method for manufacturing the screen forming body 200 of the above-mentioned embodiment is a method for manufacturing the screen forming body 200 for the fiber accumulation drum 100. The method for manufacturing the screen forming body 200 comprises: a process of preparing a flat screen 210b having a plurality of first holes 212 formed therein; a process of preparing a flat reinforcing member 220b having a plurality of second holes 222 formed therein; a process of integrating the flat screen 210b and the flat reinforcing member 220b by surface bonding; and a process of bending the integrated screen 210b and the reinforcing member 220b into an arc shape.

[0074] In the method for manufacturing the screen forming body 200, since the flat screen 210b is surface-joined with the flat reinforcing member 220b, the screen 210 and the reinforcing member 220 can be firmly joined compared to the case where the reinforcing member 220 is point-joined to the screen 210. Therefore, in the bending process after the flat screen 210b and the flat reinforcing member 220b are integrated, the occurrence of undesirable conditions such as the joining of the screen 210 and the reinforcing member 220 falling off can be suppressed.

[0075] (3-2)

[0076] In the method of manufacturing the mesh forming body 200 of the above embodiment, in the step of integrating the flat mesh 210b and the flat reinforcement member 220b, the flat mesh 210b and the flat reinforcement member 220b are diffusion-bonded.

[0077] In the method for manufacturing the mesh forming body 200 of the above-described embodiment, high bonding strength can be obtained in the bonding portion between the mesh 210 and the reinforcing member 220 by diffusion bonding.

[0078] (3-3)

[0079] In the method for manufacturing the mesh forming body 200 of the above embodiment, the step of preparing the flat reinforcing member 220 b includes the step of forming the second hole 222 by laser processing in the flat member 220 a before the second hole 222 is formed.

[0080] In the manufacturing method of the mesh forming body 200 of the above embodiment, the reinforcing member 220 can be formed with good precision by using laser processing. As a result, in the surface bonding of the flat mesh 210b and the flat reinforcing member 220b, the mesh 210b and the reinforcing member 220b will not be partially bonded, and it is easy to suppress the occurrence of undesirable conditions such as reduced bonding strength in the portion.

[0081] (3-4)

[0082] In the method for manufacturing the mesh forming body 200 of the above embodiment, the distance between adjacent second holes 222 is 0.3 mm or more and 0.7 mm or less.

[0083] In the method for manufacturing the mesh forming body 200 of the above embodiment, since the distance between the second holes 222 formed in the reinforcing member 220 is narrow and equal to or less than 0.7 mm, the opening rate of the reinforcing member 220 can be increased, and the reinforcing member 220 can be prevented from becoming a large ventilation resistance when the fiber is accumulated on the fiber accumulation drum 100. On the other hand, in the method for manufacturing the mesh forming body 200 of the above embodiment, since the distance between the second holes 222 formed in the reinforcing member 220 is ensured to be at least 0.3 mm, the mesh can be firmly supported by the reinforcing member 220.

[0084] (3-5)

[0085] In the method of manufacturing the mesh forming body 200 of the above embodiment, among the plurality of second holes 222 , the width dimensions along the circumferential direction of the second holes 222 when formed into the arc shape are the same.

[0086] In the manufacturing method of the mesh forming body 200 of the above embodiment, since the width dimension of the second holes 222 in the reinforcing member 220 along the circumferential direction when formed into an arc shape is the same, the ventilation resistance of the mesh forming body 200 is easily uniform regardless of the location when fiber is accumulated on the fiber accumulation drum 100. Therefore, it is easy to manufacture an absorbent body with uniform thickness using the fiber accumulation drum 100.

[0087] (3-6)

[0088] The method for manufacturing the mesh forming body 200 of the above embodiment includes a step of forming the first holes 212 by etching the flat plate-shaped member 210 a before the first holes 212 are formed.

[0089] (3-7)

[0090] The fiber accumulation drum 100 of the above embodiment includes a screen forming body 200. The screen forming body 200 includes a plate-like screen 210 having a plurality of first holes 212 formed therein and a plate-like reinforcing member 220 having a plurality of second holes 222 formed therein and integrated with the screen 210 by surface bonding.

[0091] Furthermore, in the fiber accumulation drum 100 according to the seventh aspect of the present invention, since the mesh forming body 200 in which the mesh 210 and the reinforcing member 220 are surface-joined is used, the mesh 210 can be firmly supported by the reinforcing member 220, and the life of the mesh can be extended.

[0092] Finally, the technical ideas that can be grasped from the above-mentioned embodiments are reviewed below.

[0093] The first aspect of the present invention is a method for manufacturing a screen forming body for a fiber accumulation drum. The method for manufacturing a screen forming body comprises: a step of preparing a flat screen having a plurality of first holes; a step of preparing a flat reinforcing member having a plurality of second holes; a step of integrating the flat screen and the flat reinforcing member by surface bonding; and a step of bending the integrated screen and reinforcing member into an arc shape.

[0094] In the manufacturing method of the screen forming body of the first aspect, since the flat screen is joined to the flat reinforcing member surface, the screen and the reinforcing member can be firmly joined compared to the case where the reinforcing member is joined to the screen at points. Therefore, in the bending process after the flat screen and the flat reinforcing member are integrated, the occurrence of undesirable conditions such as the screen and the reinforcing member falling off can be suppressed.

[0095] A second method of manufacturing a mesh forming body according to the present invention is the method of manufacturing a mesh forming body according to the first method, wherein in the step of integrating the flat mesh and the flat reinforcement member, the flat mesh and the flat reinforcement member are diffusion-bonded.

[0096] In the method for manufacturing the mesh formed body according to the second aspect, high joining strength can be obtained in the joining portion between the mesh and the reinforcing member by diffusion bonding.

[0097] The method for manufacturing a mesh forming body according to a third aspect of the present invention is based on the method for manufacturing a mesh forming body according to the first or second aspect, and includes, in the step of preparing a reinforcing member, a step of forming the second hole in the flat plate-like member by laser processing before forming the second hole.

[0098] In the manufacturing method of the screen forming body of the embodiment of the third aspect, the reinforcing member can be formed with good precision by using laser processing. As a result, in the surface joining of the flat screen and the flat reinforcing member, the screen and the reinforcing member will not be partially joined, which can easily suppress the occurrence of undesirable conditions such as reduced joining strength of the part.

[0099] A method for manufacturing a mesh formation according to a fourth aspect of the present invention is the method for manufacturing a mesh formation according to any one of the first to third aspects, wherein a distance between adjacent second holes is 0.3 mm to 0.7 mm.

[0100] In the manufacturing method of the screen forming body of the fourth aspect, since the distance between the second holes formed by the reinforcing member is narrow and is less than 0.7 mm, the opening rate of the reinforcing member can be increased, and when the fiber is accumulated on the fiber accumulation drum, the reinforcing member can be prevented from becoming a large ventilation resistance. On the other hand, in the manufacturing method of the screen forming body of the fourth aspect, since the distance between the second holes formed by the reinforcing member is ensured to be at least 0.3 mm, the screen can be firmly supported by the reinforcing member.

[0101] A fifth aspect of the present invention is a method for manufacturing a mesh forming body according to any one of the first to fourth aspects, wherein the width dimensions of the plurality of second holes along the circumferential direction when the second holes are formed into an arc shape are the same.

[0102] In the manufacturing method of the mesh forming body of the fifth aspect, since the width dimension of the second hole in the reinforcing member along the circumferential direction when formed into an arc shape is the same, when fiber is accumulated on a fiber accumulation drum, the ventilation resistance of the mesh forming body is easily uniform regardless of the location. Therefore, it is easy to manufacture an absorbent body with uniform thickness using a fiber accumulation drum.

[0103] A sixth aspect of the present invention is the method for manufacturing a mesh formation body according to any one of the first to fifth aspects, and further includes forming the first holes by etching the flat plate member before forming the first holes.

[0104] A fiber accumulation drum according to a seventh aspect of the present invention includes a screen forming body including a plate-like screen having a plurality of first holes and a plate-like reinforcing member having a plurality of second holes and being integrated with the screen by surface bonding.

[0105] In the fiber stacking drum according to the seventh aspect of the present invention, since the screen forming body in which the screen and the reinforcing member are surface-joined is used, the screen can be firmly supported by the reinforcing member, and the life of the screen can be extended.

[0106] Explanation of symbols

[0107] 100 fiber drum

[0108] 200 screen forming body

[0109] 210 (bent) screen

[0110] 210a Flat plate member

[0111] 210b Flat screen

[0112] 212 First Hole

[0113] 220 (after bending) reinforcement member

[0114] 220a Flat plate member

[0115] 220b Flat plate reinforcement member

[0116] 222 second hole.

Claims

1. A method for manufacturing a screen forming body for a fiber accumulation drum, comprising: A step of preparing a flat screen having a plurality of first holes; a step of preparing a flat reinforcing member having a plurality of second holes formed therein; The step of integrating the flat plate-shaped screen and the flat plate-shaped reinforcing member by surface bonding; and a step of bending the integrated screen and the reinforcing member into an arc shape. 2 . The method for manufacturing a mesh forming body according to claim 1 , wherein in the step of integrating the flat mesh and the flat reinforcement member, the flat mesh and the flat reinforcement member are diffusion-bonded. 3 . The method for manufacturing a mesh forming body according to claim 1 , wherein the step of preparing the reinforcing member includes a step of forming the second holes by laser processing in the flat plate-shaped member before the second holes are formed. 4 . The method for producing a mesh formed body according to claim 1 , wherein a distance between adjacent second holes is 0.3 mm to 0.7 mm. 5 . The method for manufacturing a mesh forming body according to claim 1 , wherein among the plurality of second holes, the second holes have the same width dimension along the circumferential direction when formed into an arc shape. 6 . The method for manufacturing a mesh formed body according to claim 1 , wherein the step of preparing the mesh includes forming the first holes by etching a flat plate-like member before forming the first holes. 7.Fiber accumulation drum, equipped with screen forming body, The screen forming body comprises: A plate-shaped screen is formed with a plurality of first holes; The plate-shaped reinforcing member is formed with a plurality of second holes and is integrated with the screen by surface bonding.

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