JP2001008966A - Processing device for sheet type material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet type material processing device and its manufacturing method of joining, cutting and drilling sheet type material certainly. SOLUTION: A processing device for sheet type material has the first pressing member 11, which has a convex cemented carbide part 15 made by spraying cemented carbide, and a convex part, which is the same shape to the convex cemented carbide part 15 or not the same, or a hollow part, which is fixed to the convex cemented carbide part 15, or the second pressing member 12, which has smooth surface. Then it has a pressing joining part, a pressing cutting part, or a pressing drilling part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-like material processing apparatus and a method for manufacturing the same. The present invention also relates to a method for manufacturing an article suitably used for manufacturing an absorbent article such as a sanitary napkin or a disposable diaper.

[0002]

2. Description of the Related Art In the manufacture of absorbent articles such as sanitary napkins and disposable diapers, for example, in order to improve the fit of the absorbent article to the body of a wearer, a sheet-like material is used. A step of forming a groove of a predetermined shape by bonding the surface material and the absorbent body by crimping,
There is a step of cutting the joint between the front surface material and the back surface material made of a sheet material by trimming to obtain a final product shape.
For these joining and cutting, generally, a convex roll having a convex portion and a convex portion having the same or different shape as the convex portion or a concave portion capable of fitting with the convex portion, or a smooth receiving roll. A method is used in which an absorbent article is interposed between the two rolls and pressure bonding or pressure cutting is performed by both rolls with or without heating.

However, when the rolls are used, there is a limit to increasing the nip pressure between the two rolls depending on the material of the rolls due to a problem of hardness, and the joining cannot be performed reliably or the cutting cannot be performed. There is. Further, depending on the material of the roll, the thermal conductivity is low, and large energy may be required when joining or cutting under heating. In addition, if used repeatedly, the protruding portions may be worn, so that bonding may not be performed reliably or the cutting may not be performed. If the convex part is worn, it is impossible to restore it, it is necessary to make a new roll,
Manufacturing costs increase.

Accordingly, the present invention provides a method for joining sheet-like materials,
An object of the present invention is to provide a sheet-like material processing apparatus capable of reliably performing cutting or punching, and a method for manufacturing the apparatus. It is another object of the present invention to provide a sheet-like material processing apparatus which can easily restore even if a portion where the joining, cutting or piercing is performed is worn, and a method of manufacturing the apparatus. Also,
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing various articles, particularly articles that can reliably perform joining, cutting, or perforation of a material constituting an absorbent article.

[0005]

According to the present invention, there is provided a first pressing member having a convex carbide portion formed by spraying a cemented carbide, and a first pressing member disposed at a position facing the first member; A pressing joint having a second pressing member having a convex portion having the same shape or a different shape as the convex carbide portion or a concave portion capable of being fitted with the convex carbide portion, or having a smooth surface. The above object has been achieved by providing a sheet-like material processing apparatus having a press cutting section or a press punching section.

Further, the present invention provides a first pressing member having a convex carbide part, a convex part having the same or different shape as the convex carbide part, or a concave part capable of fitting with the convex carbide part. Or a method for manufacturing a sheet-like material processing apparatus having a press-joining portion having a second pressing member having a smooth surface, a press-cutting portion or a press-piercing portion, wherein the first pressing member has A sheet comprising a step of spraying a cemented carbide on a base material and processing a portion where the cemented carbide is sprayed into a desired convex shape to produce the first pressing member having the convex cemented carbide portion. An object of the present invention is to provide a method for manufacturing a shape material processing apparatus.

[0007] The present invention also provides a first pressing member having a convex carbide part formed by spraying a cemented carbide, a convex part having the same shape as or a shape different from the convex carbide part, or the convex part. An article constituting material to be joined between the cemented carbide portion and a second pressing member having a concave portion capable of fitting or having a smooth surface.
It is an object of the present invention to provide a method of manufacturing an article including a step of pressing, joining, cutting or punching the material with both members by interposing an article constituting material to be cut or an article constituting material to be perforated.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. In the present embodiment, a method for manufacturing a sanitary napkin, which is one of the absorbent articles, and a processing device used for the method will be described.

FIG. 1 is a plan view of a sanitary napkin 1 manufactured in the present embodiment. The sanitary napkin 1 includes a liquid-permeable surface material 2, a liquid-impermeable back material 3, and an absorber 4 interposed between the surface material 2 and the back material 3. The surface material 2 covers the upper surface of the absorber 4, and extends from both left and right sides of the absorber 4 to extend therethrough.
, And cover the left and right sides of the lower surface of the absorber 4. The back material 3 is joined to the absorber 4 and the surface material 2 folded on the lower surface side of the absorber 4 by hot melt or the like on the lower surface of the absorber 4. The front surface member 2 and the back surface member 3 extend from the front and rear ends of the absorber 4, and are joined and fixed to each other at the extending portions by heat sealing or the like.

On the surface material side of the napkin 1, a position facing the excretion site of the wearer when the napkin 1 is worn,
A pair of curved grooves 5, 5 are formed. Grooves 5, 5
Are formed along the longitudinal direction of the napkin 1 and curved toward the center line in the width direction with the center line in the width direction as a symmetry axis. The grooves 5, 5 are formed by joining the surface material 2 and the absorber 4 by pressure bonding under heating.

FIG. 2 shows a groove forming apparatus in the napkin 1 manufacturing apparatus. The groove forming device 10 is a device suitably used for processing a long sheet material, and includes a first roll 11 as a first pressing member and a second pressing member disposed at a position facing the first roll 11. A second roll 12 is provided as a member. Both rolls 11 and 12
It is rotatable in different directions (directions indicated by arrows in FIG. 2). FIG. 3 shows a state in which the first roll 11 is viewed from the peripheral surface direction. 1st roll 1
Reference numeral 1 denotes a pressure-bonding roll having a pair of ridges 13, 13 formed on its circumferential surface along the rotation direction of the roll. FIG. 3 shows only one of the two ridges, and the other ridge is formed at a position opposite to the ridge shown in the figure. I have. Each pair of protrusions 13 has a shape corresponding to the shape of the groove 5 in the napkin 1 shown in FIG.

As shown in FIG. 2, a large number of holes are formed along the axial direction of the roll at a position slightly near the center from the peripheral surface of the first roll 11, and this hole has an electric heating portion. A heating element 14 such as a heater and a sensor are fitted. Then, the first roll 11 can be heated by causing the heating element 14 to generate heat.

Second Roll 1 in Groove Forming Apparatus 10
Numeral 2 is used as a receiving roll of the first roll 11 as a pressure roll, and its peripheral surface is smooth. As a constituent material of the second roll, a material having a hardness equal to or smaller than the convex superhard portion 15 described later is used. Various metals, rubber, urethane, resin, and the like are used as the material having a hardness smaller than that of the convex superhard portion 15.

In the present embodiment, as shown in FIG. 4, the ridges 1 on the first roll of the groove forming device 10 are used.
At the tip of 3, a cemented carbide portion is formed by spraying a cemented carbide and processing it into a predetermined convex shape, for example, by grinding.
have. Since the cemented carbide is extremely harder than ordinary metals or alloys, such a cemented carbide part 15
When the first roll 11 having the above and the second roll are used to press-join or press-cut the constituent material of the napkin 1, the pressing pressure (nip pressure) can be increased,
Joining or cutting can be performed reliably. Further, since the hardness difference between the second roll and the second roll is easily made clear, the second roll, which is less expensive to manufacture than the first roll 11, can be obtained.
Of the first roll 1 easily.
1 can be extended and the operating cost of the apparatus can be reduced.

Further, since the cemented carbide has a high thermal conductivity, when joining, cutting or perforating the constituent material of the napkin 1 while the first roll 11 is heated, the heat joining is efficiently performed with little energy. Heat cutting or heat perforation can be performed. Further, when the shape of the ridge 13 is complicated, the temperature tends to vary, but when the tip is formed of a cemented carbide, there is an advantage that the temperature tends to be uniform.

Further, since the cemented carbide has high wear resistance, even if the first roll 11 is used for a long period of time, the convex cemented carbide 1
5 has little wear, and the joining, cutting or perforation can be sufficiently performed over a long period of time. Also, even if the convex cemented carbide part 15 is worn and the joining, cutting, or perforation becomes insufficient, the convex cemented carbide part 15 is removed, and the cemented carbide is sprayed again thereon. Since it is only necessary to restore the convex superhard portion 15, there is no need to make a new roll from scratch, and manufacturing costs can be reduced.

As described above, the convex carbide portion 15 is formed by spraying and working (for example, grinding) a cemented carbide. Conventionally, when a cemented carbide part made of cemented carbide is incorporated into a pressure roll, the cemented carbide powder is formed into a predetermined shape, which is then sintered and processed, and then incorporated into a separate system, resulting in manufacturing costs. However, by using thermal spraying instead of this, the manufacturing cost of the first roll 11 can be reduced.

As the cemented carbide, conventionally known ones, for example, those having a high melting point metal carbide such as tungsten carbide as a main component can be used without any particular limitation. In particular, when the cemented carbide contains 50 to 90% by weight of W, 5 to 48% by weight of Co, and 2 to 10% by weight of C, and the balance is composed of unavoidable impurities, a cemented carbide with high wear resistance is obtained. It is preferable because it can be performed. Further, it is preferable to replace a part or all of Co constituting the cemented carbide with Ni because corrosion resistance is improved. Further, it is preferable that a part of W constituting the cemented carbide is replaced by Cr ₃ C ₂ because corrosion resistance is improved, and when one or both of TiC and TaC are replaced, wear resistance is improved. Is preferred.

As a method of spraying a cemented carbide, a method of spraying the cemented carbide as fine particles in a molten state onto a base material, that is, the upper surface of the ridge portion 13 in this embodiment, or the like can be used. As the base material, the deformation of the base material during heating or use is small, and the adhesion strength with the cemented carbide is improved.
It is preferable to use 45C, SCM, SNCM, SKD, SKH and the like.

The sprayed thickness T of the convex carbide part 15 (see FIG. 4)
Is preferably 10 mm or less, particularly 0.1 to 10 mm, particularly preferably 0.1 to 1.0 mm, from the viewpoint of improving the adhesion strength to the base material, that is, in the present embodiment, the ridge 13.

Next, a method of manufacturing the sanitary napkin 1 using the above-described groove forming apparatus as an example of the sheet-like material processing apparatus will be described. First, the sheet material is unwound at a predetermined speed from a raw material on which a liquid-permeable long belt-like sheet material constituting the surface material 2 is wound, and an adhesive such as hot melt is placed on one surface thereof. Is applied in a predetermined pattern. Absorber 4 made of absorbent paper or a mixture of pulp and superabsorbent polymer is arranged at predetermined intervals. Then, the liquid-permeable sheet-like material extending from the left and right sides of the absorber 4 is rolled up and overlapped on the left and right sides of the upper surface of the absorber 4. In this way, a long strip of liquid-permeable long strip-shaped sheet material and a plurality of absorbers 4 arranged at predetermined intervals on the sheet-shaped material is obtained. Next, as shown in FIG. 2, the elongated material 16 is passed between the first roll 11 and the second roll 12 described above, and the elongated material 16 is pressed by the two rolls 11 and 12. The state of this pressing is shown in FIG.

As shown in FIG. 5, in the long object 16, the liquid-permeable sheet material 17 side faces the first roll 11, and the absorber 4 faces the second roll 12. Pass between the two rolls. When the long object 16 passes through both rolls, the ridge 1 formed on the first roll 11 is formed.
3 and 13 push the liquid-permeable sheet material 17 into the absorber 4 side. In this case, since the first roll 11 is heated to a predetermined temperature, the liquid-permeable sheet material 17 is heat-pressed to the absorber 4 in a state of being softened or melted, and the liquid-permeable sheet material is heated. The material 17 and the absorber 4 are pressed and joined. As a result, the grooves 5 and 5 having the shape shown in FIG. In this pressure joining, since the first roll 11 having the convex superhard portion 15 is used as described above, the pressure of the pressing can be made higher than usual, and the pressure joining can be reliably performed. . As shown in FIG. 3, a large number of small grooves are formed on the upper surface of the convex carbide part 15, so that the pressure-bonding between the liquid-permeable sheet material 17 and the absorber 4 can be performed more reliably. It has been made to be done.

Next, the sheet material is unwound at a predetermined speed from the raw material on which the liquid-impermeable long belt-shaped sheet material constituting the back material 3 is wound, and the hot material is placed on one surface thereof. An adhesive such as melt is applied in a predetermined pattern. The adhesive-applied surface of the sheet-like material is joined to the absorbent body 4 side of the elongated member 16 in which the groove 5 is formed. Then, the liquid-permeable sheet-like material 17 and the liquid-impermeable sheet-like material extending from the front and rear ends of the absorbing portion 4 are joined by heat sealing, and the joined portion is cut into a predetermined shape. 1
The sanitary napkin 1 shown in FIG.

The present invention is not limited to the above embodiment, and various modifications are possible. For example, the processing apparatus of the present invention
If it is a sheet material, it is not limited to the constituent material of the absorbent article, and can be used for processing other materials. Also,
The processing apparatus of the present invention can be used for press cutting, press punching, as well as press joining of sheet materials. The press cutting and the press punching can be performed with or without heating the first roll 11 similarly to the press bonding.

The method for producing an article of the present invention is not limited to the production of an absorbent article, but can be applied to a method for producing other articles.

In place of the smooth roll, the second roll 12 can be fitted with a convex portion having the same or different shape as the convex carbide portion 15 of the first roll 11 or with the convex carbide portion 15. A roll having a concave portion may be used. Also, a cemented carbide portion formed by spraying a cemented carbide is formed on the smooth surface of the second roll 12 or the surface of the second roll 12 on which the convex portion or the concave portion is formed. May be.

Also, instead of forming the cemented carbide portion made of cemented carbide only on the upper surface of the ridge 13 of the first roll 11 as shown in FIG. 4, as shown in FIG. It may be formed over the entire surface of the first roll 11. Also, the convex shape of the super hard portion formed on the upper surface of the ridge portion 13 is made to have a triangular or trapezoidal longitudinal section as shown in FIG. The shape may be suitable for cutting.

As a processing method for forming the shape of the convex superhard portion of the first roll 11, it is preferable to use polishing, end milling, etc. in addition to the above-mentioned grinding, and furthermore, etching, blasting, and the like. , Electric discharge machining or the like may be used.

Further, in order to further improve the adhesion strength between the base material and the hard portion made of a hard metal, the surface of the base material on which the hard portion is formed may be subjected to unevenness processing.

Further, as the first and second pressing members, flat pressing members may be used instead of the first and second rolls 11 and 12.

These embodiments can be replaced with each other as appropriate.

[0032]

According to the present invention, joining of sheet-like materials,
Provided is a sheet-like material processing apparatus capable of performing cutting or punching at a high pressure, and reliably performing the joining, cutting or punching, and a method of manufacturing the same. Further, according to the present invention, there is provided a sheet-like material processing apparatus capable of uniformly heating a convex portion for performing the joining, cutting, or punching when the joining, cutting, or punching is performed under heating, and a method of manufacturing the same. Is done. Further, according to the present invention, there is provided a sheet-like material processing apparatus and a method for manufacturing the same, which can easily recover even if the convex portion for performing the joining, cutting or perforation is worn. Further, according to the present invention, various articles, particularly joining of materials constituting the absorbent article,
A method for manufacturing an article capable of reliably performing cutting or perforation is provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a sanitary napkin manufactured in one embodiment of the present invention.

FIG. 2 is a schematic view showing a groove forming device in the sanitary napkin manufacturing apparatus shown in FIG.

FIG. 3 is a schematic view showing a first roll in the groove forming apparatus shown in FIG. 2;

FIG. 4 is an enlarged schematic view showing a main part of a first roll.

FIG. 5 is a schematic view showing a state in which a groove is formed.

FIG. 6 is a schematic view (an equivalent view of FIG. 4) showing another form of the convex superhard portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Groove forming apparatus 11 1st roll 12 2nd roll 13 Ridge 15 Convex superhard part 16 Elongate thing 17 Liquid permeable sheet material

Continuing on the front page (72) Inventor Nobuyuki Kamioiri 2606 Akabane, Kaigamachi, Haga-gun, Tochigi Prefecture Inside Kao Research Institute (72) Inventor Eiji Sato 2-17-10 Shimomaruko, Ota-ku, Tokyo Fuji Die Co., Ltd.

Claims (8)

[Claims] 1. A first pressing member having a convex carbide portion formed by spraying a cemented carbide, and a first pressing member disposed at a position facing the first member and having the same shape as the convex carbide portion. Alternatively, a pressing joint, a pressing cutting part or a pressing punching part having a deformed convex part or a concave part capable of fitting with the convex carbide part or having a second pressing member having a smooth surface is provided. Material processing equipment having. 2. The sheet-like material processing apparatus according to claim 1, wherein the thickness of the sprayed superhard portion is 10 mm or less. 3. The cemented carbide contains 50 to 90% by weight of W, 5 to 48% by weight of Co, and 2 to 10% by weight of C,
The sheet-like material processing apparatus according to claim 1 or 2, wherein the remaining part is made of unavoidable impurities. 4. A part of the metal constituting the cemented carbide is C
_{r 3 C 2, Ni, TiC} , sheet material processing apparatus according to claim 1 which is substituted by one of TaC or two or more. 5. The sheet-like material processing apparatus according to claim 1, wherein said first pressing member is heatable. 6. A first pressing member having a convex superhard portion,
A pressing joint having a second pressing member having a convex portion having the same or different shape as the convex carbide portion or a concave portion capable of fitting with the convex carbide portion or having a smooth surface; A method for manufacturing a sheet-like material processing apparatus having a press cutting portion or a press punching portion, wherein a hard metal is sprayed on a base material of the first pressing member, and a portion where the hard metal is sprayed is desired. A method of manufacturing a sheet-like material processing apparatus, comprising: manufacturing the first pressing member having the convex superhard portion by processing into a convex shape. 7. A first pressing member having a projecting cemented portion formed by spraying a cemented carbide, a projecting portion having the same shape as or a shape different from the projecting cemented portion, or the projecting cemented portion. And a second pressing member having a concave portion capable of fitting or having a smooth surface, with an article constituting material to be joined, an article constituting material to be cut or an article constituting material to be perforated interposed therebetween. ,
A method for producing an article, comprising a step of press-joining, press-cutting or press-piercing the material with both members. 8. The method according to claim 7, wherein the article is an absorbent article.