JP3477191B1 - Method for producing hollow fiber molded body - Google Patents

Abstract

A hollow fiber having various shapes including a complicated bent shape, a plurality of fiber laminates is firmly integrated, and a hollow fiber molded body having a uniform thickness can be suitably manufactured. To provide a method for producing a molded article. SOLUTION: A papermaking mold 2 in which split dies 21 and 22 are combined to form a cavity 20 having two openings 20a and 20b communicating with the outside, and an expandable and contractible core disposed in the cavity 20 are provided. 3 is a method for producing a hollow fiber molded body used. Before combining the split molds 21 and 22, the split molds 21 and 22 are immersed in a fiber slurry to produce the fiber laminate 10.
a, forming the fiber laminates 10a, 10b
The method includes a step of disposing the core 3 in the cavity 20 and a step of dehydrating and molding the molded body 1 in the papermaking mold 2 while combining the split dies 21 and 22 in which the b is formed.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for manufacturing a hollow fiber molded body, a hollow fiber molded body, and an apparatus for manufacturing a hollow fiber molded body.

[0002]

2. Description of the Related Art As a conventional technique relating to a method for producing a pulp molded body, for example, a technique described in Japanese Patent Publication No. 35-9669 is known. In this technique, a core having an expandable / contractible membrane is inserted into a fiber laminate having an opening formed in a papermaking mold through the opening, and a fluid is supplied into the membrane to form the membrane. While expanding and pressing the molded body to the inner surface of the papermaking mold,
The molded body is dehydrated.

By the way, this method for producing a pulp molded body is suitable for molding a hollow container having an opening which opens upward, but a tubular hollow fiber molded body having a bent portion or a twisted portion is used. Not suitable for manufacturing.

On the other hand, a technique described in Japanese Patent Laid-Open No. 128412/1982 is known as a conventional technique for manufacturing a bent hollow fiber molded body. In this technique, a pair of split molds are combined to form a cavity having two or more openings communicating with the outside, and two cores are inserted through the openings to form a dogleg shape. The body is dehydrated by papermaking. In this technique, since the core is taken in and out through the opening of the cavity, when the cavity has a complicated shape such that the cavity is bent at two or more places, the core may not be inserted into the cavity. there were. Further, this technique is difficult to apply to the production of hollow fiber moldings in which the inner diameter of the open end is smaller than the inner diameter of the intermediate portion or tubular hollow fiber moldings having a twisted portion.

As a method for manufacturing a tubular hollow fiber molded article having a plurality of openings, the technique described in Japanese Patent Application Laid-Open No. 2000-239998 is known. This technique integrates fiber laminates individually made with a plurality of split molds by combining these split molds to produce a tubular molded product having a uniform wall thickness. It has been desired to develop a method for manufacturing a tubular hollow fiber molded body that is more firmly integrated and has a uniform wall thickness.

Therefore, an object of the present invention is to provide a hollow fiber molded article which has a complicated bending configuration and in which the fiber laminate is firmly integrated and has a uniform wall thickness, a suitable manufacturing method and a manufacturing apparatus for the molded article. To do.

[0007]

SUMMARY OF THE INVENTION The present invention provides a papermaking mold in which a pair of split molds are combined to form a cavity having two or more openings communicating with the outside, and an expansion machine provided in the cavity. A method for producing a hollow fiber molded body using a shrinkable core, wherein the split mold is immersed in a fiber slurry before combining the split molds to form a fiber laminate on the formation surface of the cavity. 1 and the fiber laminated body
The fiber slurry before combining the split molds made
On the fiber laminate formed into one of the split molds within
A second step of combining該割type from by disposing a core arranging the core in the cavity, and dried paper making has been said each fiber laminate inflating said core wherein Extract The above object is achieved by providing a method for producing a hollow fiber molded article, which comprises a third step of molding the hollow fiber molded article in a mold.

[0008]

Further, according to the present invention, a pair of split molds are combined to form a cavity, and a fiber laminate formed by each split mold is dehydrated to form a hollow fiber molded product. Core and one of the split molds in the fiber slurry
Core arrangement for arranging the core on the fiber laminate produced
The papermaking mold has two or more openings communicating with the outside, the core is inflatable and contractible, and is bent so that it can be arranged in the cavity between at least two openings. The object is achieved by providing an apparatus for manufacturing a hollow fiber molded body which is flexible.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on its preferred embodiments.

1 to 3 show a first embodiment in which the method for producing a hollow fiber molded body of the present invention is applied to the production of a tubular fiber molded body. In these figures, reference numeral 1
Is a hollow fiber molded body (hereinafter, also simply referred to as a molded body), 1
0 indicates the fiber slurry, and P indicates the pool of the fiber slurry.

As shown in FIG. 2B, in the method for manufacturing a molded body of this embodiment, a pair (one set) of split molds 21 and 22 are combined to have openings 20a and 20b communicating with the outside. In addition, a papermaking mold 2 in which a cavity 20 having a bent portion is formed, and an expandable / contractible core 3 arranged in the cavity 20 are used.

Although not shown in the drawing, in the manufacturing method of this embodiment, the split molds 21 and 22 of the papermaking mold 2 are used.
A manufacturing apparatus is used which includes a vertical movement mechanism for immersing the papermaking slurry in the fiber slurry 10 and pulling it up from the fiber slurry 10, and a mold clamping mechanism for opening and closing the papermaking mold 2 in the fiber slurry and in the air. The vertical movement mechanism is composed of a hydraulic cylinder and enables stable vertical movement of the papermaking mold 2. The mold clamping mechanism employs a hydraulic cylinder mechanism so that split molds can be opened and closed in parallel to the mold opening and closing direction and a predetermined mold clamping force is applied when the papermaking mold 2 is in a closed state.
It enables stable opening and closing of the papermaking mold 2 in the fiber slurry. As the vertical movement mechanism and the mold clamping mechanism, in addition to the hydraulic cylinder mechanism, a link mechanism, an air cylinder mechanism, a servo mechanism, other drive mechanisms, or a combination thereof can be adopted.

The vertical movement mechanism includes a rotating shaft for rotating the papermaking mold 2 around its longitudinal axis, a drive source for rotating the rotating shaft, and a papermaking mold arranged on the rotating shaft at a predetermined angle. It can also be configured with a support arm. In this case, a set of split dies forming a papermaking die is arranged at the tip of each arm in the horizontal direction with respect to the surface of the fiber slurry, and the papermaking die makes one revolution as the rotary shaft rotates. In the meantime, it is possible to make it possible to carry out dipping of the split mold into the fiber slurry, papermaking of the fiber laminate and dehydration molding of the hollow fiber molded body. Then open the papermaking mold outside the fiber slurry,
The hollow fiber molded body after the dehydration molding is transferred to the drying mold together with the core 3 by a transfer means described later.

Each split mold 21, 22 has a cavity forming surface 21a, 22a and a cavity forming surface 21a, 22a.
Papermaking nets (not shown) that cover the flow passages 21b and 22b that open at 1 and the cavity forming surfaces 21a and 22a.
And are provided respectively.

The flow passages 21b and 22b are connected to a pipe line (not shown) leading to a suction means (not shown) such as a suction pump. Although not shown in the drawing, a flow groove is formed in the cavity forming surfaces 21a and 22a so as to connect the flow passages 21b and 22b, and the liquid content in the fiber slurry during papermaking and dehydration is It is designed to be discharged to the outside through the flow passages 21b and 22b.

The material of the papermaking net is not particularly limited, but for example, natural materials such as vegetable fibers and animal fibers, synthetic resins such as thermoplastic resins, thermosetting resins, regenerated resins and semi-synthetic resins. Examples of the material include metal materials such as stainless steel, copper, and brass.

As shown in FIG. 2 (b), the cavity 20 has two openings 20a and 20b communicating with the outside. The cavity 20 is bent at two places so that the opening 20b cannot be seen through from the opening 20a.

The core 3 is provided with a hollow pressing portion 30 made of a hollow elastic body and capable of expanding and contracting, and pressing portions 31 arranged at both ends of the hollow pressing portion 30.
Is flexibly provided so that it can be arranged between the openings 20a and 20b. The pressing portion 31 is used when it is considered that the hollow pressing portion 30 alone does not sufficiently press the end portion of the hollow fiber molded body, or when the hollow pressing portion 30 is reliably set in the papermaking mold 2 or the drying mold 4. . A fluid passage (not shown) for communicating with the hollow pressing portion 30 is arranged in the pressing portion 31. A pipe line (not shown) leading to a compressor or a suction pump is connected to this flow passage. By supplying a fluid described later into the hollow pressing portion 30 through the conduit or discharging the fluid from the hollow pressing portion 30 through the conduit, the hollow pressing portion 30 expands and contracts.

The tapered tip of the pressing portion 31 is fitted into the tapered openings 1a and 1b of the molded body 1. Since the molded body 1 is sandwiched between the tip portion and the papermaking mold 2 or the drying mold 4 (see FIG. 3), the molded body 1 is uniformly dehydrated up to the corners (corners) of the opening. Or dried.

The tip of the pressing portion 31 is formed to be smaller than the openings of the papermaking mold 2 and the drying mold 4 (see FIG. 3) described later and the openings of the fiber molded body 1, and the length thereof is 1
Longer than the depth of the opening. Thereby, the pressing part 31 can be smoothly taken in and out of the papermaking mold 2 or the drying mold 4 or the molded product, and the molded product 1 and the pressing part 31 can be easily separated from each other. Further, as shown in FIG. 2 (c), due to the pressing force at the time of molding, the openings of the papermaking mold and the drying mold and the molded body 1 are formed.
The contact is made over the corners of the opening so that the pressing force can be reliably transmitted to the molded body 1.

As the material of the hollow pressing portion 30 of the core 3,
There is no particular limitation as long as it is an elastic body, but from the viewpoint of durability, heat resistance, moldability, etc., it is preferable to use synthetic rubber such as urethane, fluorine rubber, silicone rubber or elastomer in addition to natural rubber. . The material of the pressing portion 31 is
In addition to the elastic body, a rigid body such as metal may be used.

In the hollow pressing portion 30 of the core 3, a weight 32 is provided.
(See FIG. 2C), the floating due to the buoyancy of the hollow pressing portion 30 is prevented when the core 3 is arranged on the fiber laminate. On the other hand, the weight 32 may deform the fiber laminated body 10a due to its own weight, and the hollow pressing portion 30 may adhere to the fiber laminated body 10a too much, which may adversely affect the subsequent paper making of the fiber laminated body. . Further, since the conveyance after the dehydration molding may be hindered, it is preferable that the weight has a weight that does not cause these adverse effects. The shape of the weight 32 is not particularly limited, but the hollow pressing portion 3
In view of the fact that it is not partially biased within 0, and that it can be easily placed in and removed from the hollow pressing part 30, the shape of the chain, the string-shaped body, etc. It is preferable that the lead is prevented from coming out from the both ends of the string or the like by passing through a string or the like.

Next, as shown in FIGS. 1A and 1B, a split mold (partial split mold) 21 is immersed in the fiber slurry 10 with its cavity forming surface (papermaking surface) facing upward. By sucking the fiber slurry 10 through the flow passage 21b, a solid content is deposited on the papermaking net to fabricate a substantially semi-circular fiber laminate 10a.

The fiber slurry is preferably composed only of pulp fibers and water. Further, in the fiber slurry, in addition to pulp fibers and water, inorganic substances such as talc and kaolinite, inorganic fibers such as glass fibers and carbon fibers, thermoplastic synthetic resin powders or fibers such as polyolefins, non-wood or plant materials. Ingredients such as fibers and polysaccharides may be included. The blending amount of these components is preferably 1 to 70% by weight, and particularly preferably 5 to 50% by weight based on the total amount of pulp fibers and the components. Further, to the fiber slurry, a dispersant for pulp fibers, a molding aid, a colorant, a coloring aid, a fungicide, etc. can be appropriately added, and further, a sizing agent, a pigment, a fixing agent, etc. are appropriately added. You can also

A material obtained by mixing acrylic fiber in esterified pulp may be mixed with the pulp fiber.
Examples of the esterified pulp include Japanese Patent Application No. 52-5
No. 200 as disclosed in, natural cellulose, derivatives thereof or phosphoric acid obtained synthetic fibers by esterification of such polyvinyl alkenyl alcohol cellulose fibers or phosphate polyvinyl alcohol fibers, and the like.

Further, the fiber slurry may be mixed with a material obtained by mixing acrylic resin into the slurry containing the esterified pulp and beaten it.

Next, as shown in FIG. 2 (a), the core 3 is placed so as to cover the fiber laminate 10a. On the other hand, the split mold 22 (the remaining split mold) is immersed in the fiber slurry to form another semi-circular fiber laminate 10b (see FIG. 2).
(See (b)).

It is preferable to dispose the core 3 on the fiber laminated body 10a in a state where the split mold 21 is disposed just below the water surface of the fiber slurry 10. Here, the state of being arranged immediately below the water surface of the fiber slurry 10 means a state in which the joining surface 21c of the split mold 21 is within 100 mm from the water surface of the fiber slurry 10. 0
It is preferably within 50 mm. If it exceeds 100 mm, it becomes difficult to dispose the core at a predetermined position due to the buoyancy of the hollow core. When the fiber laminated body comes out of the slurry, water is excessively removed from the fiber laminated body by suction or the like, which causes a bonding failure of each fiber laminated body in the next step.

The fiber laminate 10b, except for the downward cavity forming surface 22a of the split mold 2 2, are papermaking in the same manner as the papermaking fiber laminate 10a according to the split mold 21. When the split mold 21 and the split mold 22 are connected by a hinge and one of them is rotated to be combined with the other, the split mold 2 2
The cavity forming surface 22a may face upward.

Next, as shown in FIG. 2 (b), the split dies 21 and 22 on which the fiber laminates 10a and 10b have been formed are combined in the fiber slurry to form a papermaking mold 2. After forming the papermaking mold 2 in the fiber slurry 10, the fiber slurry 10 is sucked again through the flow passages 21b and 22b, and a new fiber laminate (not shown) is provided on the surface of each of the fiber laminates 10a and 10b. Papermaking. Thereby, the seams of the fiber laminates 10a and 10b are hardly left, and the surface property of the inner peripheral surface of the obtained molded body 1 is improved.

Next, the core 3 is expanded in the papermaking mold 2 to dehydrate the molded body 1 in which the fiber molded bodies 10a and 10b are integrated. In this dehydration molding process, the pressing portion 3
1 presses the molded body 1 from both sides to dehydrate the openings 1a and 1b at both ends of the molded body 1, while supplying a fluid into the hollow pressing portion 30 to expand the hollow pressing portion 30 and thereby form the molded body. 1 is pressed against the inner surface of the papermaking mold 2 (the surface on which the cavity of each split mold is formed). Thereafter, the papermaking mold 2 and the core 3 are pulled up from the fiber slurry 10, and the compact 1 is dehydrated while being pressed against the inner surface of the papermaking mold 2 to form the compact 1. In this way, by expanding the hollow pressing portion 30 in the fiber slurry 10, it is possible to eliminate the joints and steps of the obtained molded body 1 and increase the strength. The papermaking mold 2 may be pulled up from the fiber slurry 10 before pressing the molded body 1, or may be pulled up from the fiber slurry 10 while the molded body 1 is pressed.

The fluid used to expand the hollow pressing portion 30 of the core 3 is, for example, air (pressurized air), hot air (heated pressurized air), vapor, gas such as superheated steam, oil (heated). Oil) and other liquids. Especially air, hot air,
It is preferable to use superheated steam from the viewpoint of operability and the like.

The pressure for supplying the fluid into the hollow pressing portion 30 of the core 3 can be appropriately set according to the fiber laminate to be subjected to the dehydration molding, but is 0.01 to 5 MPa, particularly 0.
1-3 MPa is preferable.

In this dehydration molding step, the molded body 1 is pressed against the inner surface of the papermaking mold 2 by the pressing force of the hollow pressing portion 30 and the pressing portion 31, while the moisture of the molded body 1 is sucked through the flow passages 21b and 22b. And remove. In this way, in addition to the pressing by the core 3, the moisture of the molded body 1 is sucked and removed, so that the molded body 1 is uniformly pressed, and the wall thickness of the molded body 1 is made uniform, and its dehydration is promptly performed. Done.

The water content of the molded body 1 after the dehydration molding is preferably 30 to 80% from the viewpoints of preventing damage to the molded body 1 at the time of shifting to the dry molding step, improving drying efficiency, and the like.
˜70% is more preferred.

Next, the split molds 21 and 22 are opened, and they are separated from the papermaking mold 2 while the core 3 is placed in the dehydrated molded body 1. And FIG. 3 (a)
These are transferred to the dry molding process, as shown in FIG.

To shift from the dehydration molding to the dry molding process,
A transfer means (not shown) such as a handling robot that holds the pressing portion 31 and moves the core 3 together with the hollow fiber molded body 1 to the drying mold 4 is used.

As shown in FIG. 3B, a set of split molds 4 is provided.
The core 3 and the hollow fiber molded body 1 are placed in the drying mold 4 in which the cavities 40 having the openings 40a and 40b are formed by combining 1, 42, and the molded body 1 is dehydrated and dried to be molded.

The drying mold 4 used for dry molding is a split mold 4.
1, 42, and is provided with a heating means (not shown) such as a heater. Split dies 41 and 42 are split dies 2 of the papermaking die 2.
Cavity forming surfaces 41 a, 42 a,
The flow passages 41b and 42b that open at the cavity forming surfaces 41a and 42a are provided.

Next, the drying mold 4 is heated by the heating means and kept at a predetermined temperature. The temperature of the drying mold 4 is the same as that of the compact 1.
From the viewpoints of preventing charring and drying efficiency, 100 to 250 ° C is preferable, and 120 to 220 ° C is more preferable. It is preferable that the drying die 4 is heated and kept at a predetermined temperature before the hollow fiber molded body 1 is placed in the drying die 4.

Then, as shown in FIG. 3 (c), the molded body 1 is pressed from both sides by the pressing portions 31 to dry the opening portions 1a and 1b at both ends of the molded body 1, while the hollow pressing portion 30 is filled. A fluid is supplied, the hollow pressing portion 30 is expanded to press the molded body 1 against the inner surface of the drying mold 4 (the surface where the cavities of each split mold are formed), and the molded body 1 is dehydrated and dried while being pressed from the inside.

The pressure of the fluid at the time of supplying the fluid into the hollow pressing portion 30 can be appropriately set depending on the molded product to be dried, but is 0.01 to 5 MPa, particularly 0.1 to 10.
3 MPa is preferable. As the fluid used to expand the hollow pressing portion 30, the fluid used in the dehydration step can be used.

In the dry molding step, as in the dehydration molding, the molding 1 is pressed against the inner surface of the drying mold 4 by the pressing force of the hollow pressing portion 30 and the pressing portion 31, while the flow passage 41 is formed.
Moisture in the molded body 1 is removed by suction through b and 42b. In this way, in addition to the pressing by the core 3, the moisture of the molded body 1 is sucked and removed, so that the molded body 1 is uniformly pressed, and the wall thickness of the molded body 1 is made uniform and the drying thereof is promptly performed. Done.

When the molded body 1 is dried to a predetermined water content, the suction through the flow passages 41b and 42b is stopped, and the fluid in the hollow pressing portion 30 is discharged to shrink the hollow pressing portion 30. .

Then, the split molds 41 and 42 are opened, and as shown in FIG.
As shown in (d), the molded body 1 is taken out from the drying mold 4, one end of the hollow pressing portion 30 is removed from the pressing portion 31, the core 3 is pulled out from the molded body 1, and the dehydration / dry molding step is completed. To do.

The molded body 1 molded in this way includes:
If necessary, various treatments such as trimming treatment, attachment of another member, coating treatment with a resin layer on the inner and outer surfaces, printing treatment, water repellency treatment and the like can be performed. Especially after dry molding,
By providing the sodium silicate layer and / or the silicone resin layer on the surface of the molded body 1, the heat resistance and water resistance of the molded body 1 can be improved.

As described above, according to the method for manufacturing the molded body of this embodiment, the fiber laminate 10 is formed on the surface of the split mold 21.
After stacking a, the split mold 21 is placed immediately below the water surface of the fiber slurry 10 and the core 3 is placed on the fiber laminate 10a.
After the split die 21 and the split die 22 for making the fiber laminated body 10b are combined to form a papermaking die 2, the shaped article 1 is dehydrated by the core 3. Therefore, it is possible to efficiently manufacture a molded product which is seamless, has a thin wall, is light in weight, has a uniform thickness, and has a high bending strength and a twisted shape.
Since the obtained molded body 1 has a high sound absorbing property, it is also excellent in the sound deadening effect of the sound generated when a solid, a gas or the like flows therein.

Further, in the method for manufacturing a hollow fiber molded body of the present embodiment, after the split mold is combined in the fiber slurry to form the papermaking mold 2, the split mold is pulled up from the fiber slurry.
The core 3 presses the fiber laminate from the inside to dehydrate the molded body 1. Therefore, the wet fiber laminates are dehydrated and integrated to form the seamless molded body 1 having a uniform wall thickness.

Further, since the papermaking mold 2 is formed by combining the split molds 21 and 22, it is possible to form a cavity shape having a complicated bending or twisting shape, and a hollow fiber molding having various complicated shapes. The body can be manufactured.

Further, pressing portions 31 are provided on both sides of the hollow pressing portion 30.
Since the pressing openings 31 are used to form the tapered openings 1a and 1b of the molded body 1, the corners of the openings are also excellent in molding accuracy.

Further, since the core 3 used in the dehydration molding step is used as it is in the dry molding step, the transition from the dehydration molding step to the dry molding step is smooth and the production efficiency of the molded body is improved.

In the dry-molding step, the molded body 1 is dehydrated and dried by pressing the molded body 1 from the inner side to the inner surface of the drying mold 4 by the core 3, so that the molded body 1 can be efficiently dehydrated and dried, and the thickness is increased. It is possible to manufacture a molded product having a uniform thickness, a thin wall and a high strength.

FIG. 4 shows an embodiment in which the hollow fiber molded body of the present invention is applied to a tubular molded body having a bent portion. In FIG. 4, reference numeral 1 indicates a tubular molded body (hereinafter, also simply referred to as a molded body).

The molded body 1 shown in FIG. 4 is formed by integrating two fiber laminated bodies. The molded body 1 has two openings 1a and 1b, and a bent portion 11 between them.
The opening 1a cannot be seen through the opening 1a of the molded body 1. Further, the molded body 1 is formed with flange portions 1c and 1d for protecting the openings 1a and 1b. The flange portions 1c and 1d curl outward, respectively, and when the molded body 1 is joined to another tubular molded body or the like, damage to the opening is prevented.

The molded body 1 is preferably composed only of pulp fibers. In addition to pulp fibers, the molded body 1 includes inorganic substances such as talc and kaolinite, inorganic fibers such as glass fibers and carbon fibers, thermoplastic synthetic resin powders or fibers such as polyolefins, non-wood or vegetable fibers, and polysaccharides. You may contain the component. The blending amount of these components is 1 to 70% by weight, particularly 5 to 70% by weight based on the total amount of pulp fibers and the components.
50% by weight is preferred. In addition, a molding aid, a colorant, a coloring aid, a fungicide, a sizing agent, a pigment, a fixing agent and the like can be appropriately added to the molded body 1.

The molded body 1 may be mixed with the above-mentioned esterified pulp mixed with acrylic fiber.

[0058] Also, the molded body 1 is preferably provided with a sodium silicate layer, or / and silicon co <br/> down resin layer from the viewpoint of imparting and high water resistance high heat resistance.

Next, one embodiment of the hollow fiber molded body manufacturing apparatus of the present invention will be described with reference to the drawings. Figure 5 (a)
As shown in FIG. 2, the manufacturing apparatus 100 of the present embodiment has a cavity 2 in which a pair of split molds 21 and 22 are combined and bent.
For forming the hollow fiber molded body 1 by dehydrating the papermaking mold 2 in which 0 is formed and the fiber laminates 10a and 10b formed by the split molds 21 and 22 as shown in FIG. 5 (b). Child 3
It has and.

As shown in FIG. 5A, the split molds 21 and 22 have cavity forming surfaces 21a and 22a and a forming surface 21.
flow passages 21b and 22b opening at a and 22a,
A papermaking net (liquid permeable material, not shown) that covers the forming surfaces 21a and 22a, respectively. Split mold 21,
The joint surface (only 21c is shown) of 22 is formed on substantially one plane.

The flow passages 21b and 22b are divided into molds 21 and 22.
Are integrated into one flow passage (only 22d is shown in the figure), and the openings of these flow passages are connected to a pipe line (not shown) that leads to a suction means (not shown) such as a suction pump. There is. A flow groove (not shown) that connects the flow passages 21b and 22b is formed on the cavity forming surfaces 21a and 22a, and the liquid in the fiber slurry passes through the flow passages 21b and 22b during papermaking and dehydration. It is discharged smoothly to the outside.

The cavity 20 has two openings 20a and 20b communicating with the outside. Since the cavity 20 is bent at two places, the opening 20a cannot be seen through from the opening 20a.

The core 3 has a tubular shape made of a hollow elastic body, is expandable and contractible, and is bendable so that it can be arranged between the two openings 20a and 20b of the cavity 2. Is.

Both ends of the core 3 are detachably attached to the head 33. Each head 33 has a conduit (not shown) leading to a compressor, a suction pump, or the like.
Are connected. When the core 3 is attached to the head 33, the inside of the core 3 and the pipe line communicate with each other. Then, a fluid described later is supplied to the inside of the core 3 or discharged from the inside of the core 3 by a compressor, a suction pump, or the like.

The manufacturing apparatus 100 is immersed in the fiber slurry in association with the vertical movement mechanism of the papermaking mold, which will be described later, and the core 3 is formed on one or both of the cavity forming surfaces 21c and 22c of the split molds 21 and 22. A core disposing mechanism for disposing is provided. In this embodiment, this core disposing mechanism is shown in FIG.
As shown in FIG. 3, a gutter-shaped guide cover 34 bent corresponding to the bent shape of the cavity forming surface 21c of the split mold 21 on one side, and the core 3 arranged on the cavity forming surface according to the position of the split mold 21. This guide cover 34 so that it can be installed
Is provided in the opening / closing direction of the split mold 21, and a drive mechanism (not shown) for moving the guide cover 34 to a position where there is no hindrance after the core 3 is arranged. Inside the guide cover 34, a suction means (for example, a vacuum pad) for sucking and holding the core 3 is provided, and the core 3 is kept in a bent state in conformity with the shape of the curved cavity forming surface of the split mold 21. Be done. The drive mechanism is composed of a hydraulic or pneumatic cylinder, other general drive means, and a transmission mechanism such as a link and a gear. A plurality of core disposing mechanisms may be disposed for one split mold. Also, a plurality of cores can be arranged by one core arrangement mechanism.

The manufacturing apparatus 100 of this embodiment is shown in FIG.
As shown in (a), a drying mold 4 for drying the hollow fiber molded body 1 and a transfer means (not shown) for transferring the core 3 to the drying mold 4 together with the dehydrated hollow fiber molded body 1.
It has and.

The drying mold 4 is provided with a pair of split molds 41 and 42. The split molds 41 and 42 include heating means 41e and 42e such as heaters. Dry mold 4 split molds 41, 42
Is a cavity forming surface 41a, 42a similar to the split dies 21, 22 of the papermaking mold 2, flow passages 41b, 42b opening at the forming surface 41a, 42a, joining surfaces 41c, 42c,
It has a plurality of flow passages (only 42d is shown) which consolidate the flow passages 41b and 42b and communicate with the outside.

As the transfer means, a handling robot or the like for holding the head 33 and transferring the hollow fiber molded body 1 together with the core 3 to the drying mold 4 is used. It is preferable that the handling robot is equipped with a take-out jig or the like having a shape corresponding to the outer shape of the molded body from the viewpoint of preventing damage to the molded body when the molded body is transferred to the dry mold.

Although not shown in the drawing, the manufacturing apparatus 1
00 is the papermaking mold 2 immersed in a fiber slurry,
A vertical movement mechanism for pulling up from the fiber slurry,
A mold clamping mechanism (mold opening / closing mechanism) for opening / closing the papermaking mold 2 in the fiber slurry and in the air is provided. The vertical movement mechanism is composed of a hydraulic cylinder mechanism, and the hydraulic cylinder mechanism can stably move the papermaking mold 2 up and down. For the mold clamping mechanism, a hydraulic cylinder mechanism and a link mechanism are used together so that the split molds are opened and closed in parallel to the mold opening and closing direction and a predetermined mold clamping force is applied when the papermaking mold 2 is in the closed state. The configuration is adopted. The mold clamping mechanism can stably open and close the papermaking mold 2 in the fiber slurry. As the vertical movement mechanism and the mold clamping mechanism, an air cylinder mechanism, a servo mechanism and other drive mechanisms can be adopted in addition to the hydraulic cylinder mechanism.

The structure and operation of the vertical movement mechanism are the same as those described above.

Next, a second embodiment of the method for manufacturing a hollow fiber molded body of the present invention will be described based on an embodiment applied to a method for manufacturing the molded body 1 using the manufacturing apparatus 100. It should be noted that the description of the common points with the manufacturing method of the first embodiment is omitted. Therefore, the description in the first embodiment is appropriately applied to points that are not particularly described.

FIGS. 5 (a) to 5 (d) are papermaking / dewatering steps (first to third steps) in the manufacturing process of the molded body 1.
3 schematically shows the procedure of.

First, in the first step, the split molds 21 and 22 are dipped in a pool (not shown) of fiber slurry to suck the fiber slurry, and as shown in FIG. Fibers are deposited on the substrate to form fiber laminates 10a and 10b having a substantially semi-circular cross section.

In the second step, the fiber laminates 10a, 10
While the split molds 21 and 22 having b formed therein are combined in the fiber slurry, the core 3 is formed in the cavity 20 formed by combining the split molds 21 and 22.
To arrange.

The core 3 is placed on the fiber laminated body 10a of the split mold 21 on one side before the split molds 21 and 22 are combined. When arranging the core 3, as shown in FIG.
The core 3 is disposed inside the guide cover 34 having a shape corresponding to the cavity forming surface 21a, and the fiber laminate 1 is formed.
Place it on 0a. After placing the core 3, the guide cover 34
Is separated from the core 3 and taken out of the cavity.

Then, as shown in FIG. 5C, the split mold 2
1, 22 are combined on the joint surface, and the papermaking mold 2 is closed. When the papermaking mold 2 is closed, the fiber slurry is sucked and another fiber is deposited inside the fiber laminates 10a and 10b. The molded body thus obtained has high strength without seams or steps.

After arranging the core 3 in the cavity, a dehydration step (third step) is carried out. The dehydration is performed by pulling up the papermaking mold 2 and the core 3 in the state of FIG. 5 (c) from the fiber slurry, but it can also be performed before the papermaking mold 2 and the core 3 are pulled up from the fiber slurry. In this dehydration step, a fluid is supplied to the core 3, the core 3 is swollen to press the fiber laminates 10a and 10b against the inner surface of the papermaking mold 2, and then the papermaking mold 2 and the core 3 are fiber-slurried. Pulled up from
By continuing the pressing by the core 3, the fiber laminated body 10 is obtained.
The a and 10b are dehydrated to form the molded body 1. In this way, by bulging the core 3 in the fiber slurry in the pool, the obtained molded body can be made to have high strength without seams or steps.

The pressure of the fluid when the fluid is supplied into the core 3 can be appropriately set according to the fiber laminate to be dehydrated, but is 0.01 to 5 MPa, particularly 0.1 to 3 MPa.
a is preferred.

In the dehydration step, while the core 3 is pressed, the fiber laminate 1 is passed through the flow passages 21b, 22b and the like.
Aspirate water of 0a and 10b. By performing the pressing in this way, the molded body 1 to be formed is uniformly pressed,
The molded body 1 is quickly dehydrated while the wall thickness is made uniform.

When the molded body 1 is dehydrated to a predetermined water content, suction through the flow passages 21b, 22b and the like is stopped, and the fluid in the core 3 is discharged to shrink the core 3. Then, as shown in FIG.
2 is opened to separate the wet molded body 1 and the core 3 from the papermaking mold 2.

The water content of the molded article 1 after the dehydration step is 30 to 70% from the viewpoints of preventing damage to the molded article 1 at the time of shifting to the drying step, drying efficiency in the next drying step, and the like. Preferably, it is more preferably 40 to 60%.

The wet molded body 1 and the core 3 which have been dehydrated are moved between the split molds 41 and 42 of the drying mold 4 by the transfer means (not shown) as shown in FIG. 6A. The dehydration / drying step (fourth step) is started.

First, as shown in FIG. 6B, the split mold 4
1 and 42 are combined at the joint surface, and the molded body 1 and the core 3 are arranged in the cavity of the drying mold 4.

Next, the drying mold 4 is heated by the heating means 41e and 42e and kept at a predetermined temperature. The temperature of the drying mold 4 is 10 from the viewpoint of preventing charring of the molded body 1 and drying efficiency.
0-250 degreeC is preferable and 150-220 degreeC is more preferable.

A fluid is supplied to the core 3 to swell the core 3, and the compact 1 is pressed against the inner surface of the drying mold 4 to dehydrate and dry the compact 1. The pressure of the fluid at the time of supplying the fluid into the core 3 can be appropriately set according to the molded body to be dried, but is 0.01 to 5 MPa, particularly 0.1 to 3 MPa.
Is preferred. The fluid used in the dehydration step can be used for the bulging of the core 3.

In the drying step, in addition to the pressing by the core 3, the moisture of the molded body 1 is sucked through the flow passages 41b, 42b and the like. Thereby, the molded body 1 is pressed uniformly from the inside,
The drying is performed quickly while the wall thickness is made uniform.

When the molded body 1 can be dried to a predetermined water content, suction through the flow passages 41b, 42b and the like is stopped, and the fluid in the core 3 is discharged to shrink the core 3.

After the lapse of a predetermined time, as shown in FIG. 6C, the split dies 41 and 42 are opened, and the molded body 1 is taken out from the drying die 4. Further, one end of the core 3 is removed from the head 33, and the core 3 is pulled out from the molded body 1 to complete the dehydration / drying step. Note that one end of the core 3 may be removed from the head 33 before opening the split molds 41 and 42.

After the drying step is completed, the ends of the openings 1a and 1b of the molded body 1 are pressed against the grooves of a mold (not shown) having ring-shaped grooves having a predetermined curvature. And the end portion is curled outward so that the flange portion 1
c, 1d are formed.

If necessary, the molded body 1 can be subjected to various treatments such as trimming treatment, attachment of another member, coating treatment with a resin layer on the inner and outer surfaces, printing treatment, water repellent treatment and the like. In particular, by providing a sodium silicate layer and / or a silicone resin layer on the surface of the molded body 1, heat resistance and water resistance of the molded body can be improved.

The molded body 1 of the present embodiment manufactured in this manner has a complicated bending shape in which it is bent at two places, has no seam, is thin and lightweight, has a uniform thickness, and has high strength. Since the end portion of the molded body 1 is protected by the flange portions 1c and 1d, damage to the end portion can be prevented. Further, since the molded body 1 has a high sound absorbing property, it has an effect of reducing the sound intensity due to the solid or gas flowing inside the molded body 1.

In the method for manufacturing the hollow fiber molded body of the present embodiment using the manufacturing apparatus 100, the split molds 21, 22 are combined in the fiber slurry to form the papermaking mold 2, and then the split molds 21, 22 are made into fibers. Since the fiber laminates 10a, 10b are pulled out from the slurry and dehydrated by pressing the fiber laminates 10a, 10b with the core 3, the wet fiber laminates 10a, 10b are integrated while being dehydrated and have a seamless and uniform wall thickness. 1
Can be formed.

Further, when the core 3 is arranged in the cavity, the guide cover 34 having a shape corresponding to the bending of the cavity forming surface 21a is used.
Since the split molds 21 and 22 can be closed after arranging the core 3 on the fiber laminate 10a, it is possible to maintain a shape that matches the bending shape of the forming surface 21a of 0, so that even if the bending shape is complicated, The child 3 can be arranged in the cavity.

Further, since the papermaking mold 2 is divided into the split molds 21 and 22, it is possible to form a complicated cavity shape, and it is possible to manufacture hollow fiber molded bodies having various complicated shapes.

Further, the core 3 used in the papermaking process is used as the molded body 1
Since the process proceeds to the dehydration / drying process while being kept inside, the transition from the papermaking process to the dehydration / drying process becomes smooth in a short time.
Further, in the dehydration / drying step, since the molded body 1 is dried while being pressed against the inner surface of the drying mold 4 by the core 3, the molded body 1 can be efficiently dried, and the thickness is uniform and thin and high. It is possible to produce a strong molded body.

The present invention is not limited to the above-mentioned embodiments, and within the scope of the gist of the present invention,
It can be changed appropriately.

According to the present invention, as in the manufacturing methods of the first and second embodiments, a pair of substantially semi-circular fiber laminates are made into paper, and these are joined and integrated to dehydrate the hollow fiber molded body. Although it is preferable to mold the fiber laminates, for example, as shown in FIG. 7A, a pair of semi-arcuate fiber laminates 10a, 10 having a shape having flanges 10c, 10d on both sides of the joint.
A hollow fiber molded body 1 having a flange portion 1c obtained by making b into a paper and joining and integrating these as shown in FIG. 7 ( d ).
Can also be dehydrated and molded.

When it is desired to form a mounting flange portion on the hollow fiber molded body to be molded, as shown in FIGS. 7 ( b ) and 7 ( c ), the flange portion 1 corresponding to the mounting flange portion is formed.
The fiber laminates 10a and 10b provided with 0e were made into paper, and as shown in FIG.
As shown in (e) and (f), the hollow fiber molded body 1 having the mounting flange portion 1d can be dehydrated and molded by joining and integrating the respective fiber laminated bodies.

According to the present invention, as in the manufacturing methods of the first and second embodiments, the core 3 is used to press the fiber laminated body against the inner surface of the papermaking mold 2 and the fiber laminated body is passed through the flow passages 21b and 22b. It is preferable to suction the water contained in the body to dehydrate and mold the molded body, but the dehydration method in the dehydration molding step is not limited to this. For example, after the pressure dehydration due to the expansion of the core and the suction dehydration through the flow passage, the fluid is extracted from the core, and the blow dehydration for blowing the dehydration fluid into the void between the core and the surface of the fiber laminate is performed. May be. In addition, a plurality of dehydration methods can be combined appropriately.

According to the present invention, as in the manufacturing methods of the first and second embodiments, the fiber laminate is integrated at the time of dehydration to form the molded body 1, and then the molded body 1 is further placed in the drying mold 4. It is preferable to dehydrate and dry while pressing from the inside, but after the dehydration step is finished, the wet molded body 1 and the core 3 are separated, and only the molded body 1 is dehydrated and dried by various tunnel type dryers. You can also

In the manufacturing methods of the first and second embodiments, the fiber laminates 10a and 10b are integrated to form the molded body 1 having the two openings 1a and 1b. The fiber laminate may be integrated to form a molded product having one end opened and the other end closed, and then the other end may be cut to form a molded product having two openings.

The present invention also provides a hollow fiber molded body that is dehydrated and molded as in the manufacturing methods of the first and second embodiments.
It is preferable to shift to the drying mold by the transition means together with the core, between the papermaking mold and the drying mold split mold using a suction or the like of the molded body 1 to split mold shifts the shaped body directly You can also For example, first, the split mold and the core 3 are moved together while the compact 1 is sucked by the split mold through the flow passage of one of the split molds. Then, a dry type split mold is arranged so as to face the split mold, both split molds are combined, and then the molded body 1 is sucked through the flow path of the dry split mold while the split mold of the papermaking mold is being sucked. Compressed air is jetted from the flow path of the mold to separate the molded body 1 from the split mold of the papermaking mold. After that, instead of the split mold of the papermaking mold, a corresponding split mold of the dry mold is provided, and both split molds of the dry mold are combined to form a molded product 1.
Both the core 3 and the core 3 are placed in a dry mold cavity. This method is particularly suitable for the transfer of long molded products and thin molded products.

Further, in the manufacturing methods of the first and second embodiments, a papermaking mold and a drying mold composed of two split molds are used.
It is also possible to use a papermaking mold or a drying mold in which a cavity having a predetermined shape is formed by combining three or more split molds according to the shape of the molded body to be manufactured. Further, although the pair of fiber laminated bodies are integrated to form the molded body, the fiber laminated body divided into three or more may be integrated to form the molded body.

Further, the joint surfaces of each split mold are the same as the first and second
Although it is preferable to make the surfaces flush with each other as in the manufacturing method of the embodiment, in the case of a certain specific molded body, the joint surface is not flush (for example, a curved surface) so that the molded body can be taken out easily.
Can also be

The shapes of the cavities of the papermaking mold and the drying mold are preferably almost the same as in the manufacturing methods of the first and second embodiments, but the cavities of the papermaking mold and the drying mold are preferably the same. It is also possible to impart a bend or twist to the molded body 1 by making the molded body 1 different in shape and pressing the molded body 1 against the inner surface of the drying mold 4 by the core 3 in the dry molding process.

The method for manufacturing a hollow fiber molded body of the present invention is particularly suitable for manufacturing a hollow fiber molded body having two openings as described in the first and second embodiments. However, it can also be applied to the production of hollow fiber moldings having three or more openings.

The cavity of the papermaking mold or dry mold used in the present invention may be two-dimensionally bent or three-dimensionally bent.

Further, in the present invention, it is preferable to use a split mold provided with a papermaking net for covering the surface on which the cavity is formed, as in the manufacturing methods of the first and second embodiments. However, in addition to the papermaking net, a nonwoven fabric is used. The surface on which the cavity is formed can be covered with another liquid-permeable material. Alternatively, the papermaking mold may be a split mold made of a porous material, and the liquid permeable material may be omitted.

Further, although one core is used in the first and second embodiments, a plurality of cores may be used depending on the shape of the hollow fiber molded body to be obtained.

In the present invention, as in the second embodiment, it is preferable to dispose the core 3 in the cavity using the guide cover 34 in the fiber slurry.
May be placed in the cavity outside the fiber slurry.

Further, in the second embodiment, the opening end is rounded to form the flange after the drying step. However, the flange is previously formed on the forming surface of the cavity of the split mold constituting the papermaking mold. It is also possible to form a concave portion corresponding to the above and form the flange portion at the time of papermaking. Further, without forming the flange portion, it is possible to attach the flange member to the end portion of the molded body after forming the tubular molded body.

The present invention can also be applied to the production of a hollow fiber molded product having a twisted portion in addition to the bent portion, and a hollow fiber molded product having a twisted portion and a bent portion.

Further, the cross-sectional shape of the fiber molding produced in the present invention can be appropriately changed according to the shape of the bent portion or the twisted portion. Further, for example, the caliber of the body and the end of the molded body may be different from each other so that they can be connected by insertion fitting, or the end of the molded body can be tapered.

[0114] Applications of the hollow fiber molded article of the present invention is not particularly limited, for example, it can be preferably used for the hollow molded body such as a hollow container such as a small aperture or different shapes.

[0115]

EFFECTS OF THE INVENTION According to the present invention, a hollow structure having various shapes including a complicated bending shape in which it is bent at two or more places and a plurality of fiber laminated bodies are firmly integrated and have a uniform wall thickness. Provided are a fiber molded body, a method for manufacturing a hollow fiber molded body and a manufacturing apparatus capable of suitably manufacturing the molded body.

[Brief description of drawings]

1 (a) and 1 (b) schematically show a papermaking process in a first embodiment in which the method for producing a hollow fiber molded body of the present invention is applied to the production of the tubular molded body. There is.
FIG. 1A is a partial cross-sectional view showing a part of a papermaking process using split molds. 1 (b) is a plan view of FIG. 1 (a).

2 (a) to 2 (c) are partial cross-sectional views schematically showing a procedure of a papermaking / dewatering step in the first embodiment. FIG. 2A shows a state in which a core is arranged on the fiber molded body. FIG. 2B shows a papermaking process using a pair of split dies.
FIG. 2C shows the dehydration molding process.

3 (a) to 3 (d) are partial cross-sectional views schematically showing the procedure of a manufacturing process in the first embodiment.
FIG. 3A shows the transition from the dehydration molding process to the dry molding process. 3 (b) and 3 (c) show a dry molding process using a core. FIG. 3D is a view showing the fiber molded body and the core taken out from the drying mold.

FIG. 4 is a perspective view schematically showing an embodiment in which the hollow fiber molded body of the present invention is applied to a tubular molded body having two openings.

5 (a) to (d) schematically show a procedure of a papermaking / dewatering step in a second embodiment in which the method for producing a hollow fiber molded article of the present invention is applied to the production of a tubular molded article. It is a perspective view. FIG. 5A shows a papermaking process. FIG. 5B shows a state before the core is arranged. FIG. 5C shows the dehydration step. FIG. 5D shows a state where the split mold is separated.

6 (a) to 6 (c) schematically show the procedure of a drying step in the second embodiment. FIG. 6A shows a state before the molded body and the core are arranged in the drying mold. Figure 6
(B) shows a state where the molded body and the core are arranged in a dry mold. FIG. 6C shows a state in which the molded body and the core are separated.

7 (a) to 7 (f) schematically show a manufacturing process of a hollow fiber molded body using a fiber laminate of another embodiment in the present invention. 7 (a) and 7 ( d ) show a manufacturing process of a hollow fiber molded body having a joint flange portion. 7 ( b ) and ( e ) and FIGS. 7 ( c ) and 7 (f) show the manufacturing process of the hollow fiber molded body having the mounting flange portion.

[Explanation of symbols]

1 Tubular molded body (hollow fiber molded body) 1a, 1b opening 10 fiber slurry 10a, 10b fiber laminate 11 Bend 100 Hollow fiber molding manufacturing equipment 2 Papermaking mold 20 cavities 20a, 20b opening 21, 22 split type 21a, 22a Cavity forming surface 21b, 22b flow passage 21c Bonding surface 3 cores 30 Hollow pressing part 31 Pressing part 32 weights 33 heads 34 Guide cover 4 dry type 40 cavities 40a, 40b opening 40 41, 42 split type 41a, 42a Cavity forming surface 41b, 42b flow passage 100 Hollow fiber molding manufacturing equipment

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tokuo Tsuura 2606 Akabane Kai, Haga-gun, Tochigi Prefecture Kao Corporation Research Institute (56) References JP-A 2000-239998 (JP, A) JP-A 52-128412 (JP) , A) JP 60-223640 (JP, A) JP 2-139205 (JP, A) JP 5-57732 (JP, A) JP 2001-55697 (JP, A) (58) Survey Fields (Int.Cl. ⁷ , DB name) D21J 1/00-7/00

Claims (12)

(57) [Claims] 1. A papermaking mold in which a pair of split molds are combined to form a cavity having two or more openings communicating with the outside, and an expandable / contractible core provided in the cavity. a method of manufacturing a hollow fiber molding had a first step of papermaking fibers laminate該割type forming surface of the cavity by immersing the fiber slurry prior to combining the split molds, the fiber laminate The split mold from which the body was made
Any of the split molds in the fiber slurry before combining
After arranging the core on the fiber laminate formed into
Wherein the second step of combining the split arranging the core in the cavity, a papermaking has been said each fiber laminate core
Is expanded and dehydrated to form a hollow fiber molded body in the papermaking mold. 2. The split mold is formed with a large number of fluid flow passages that open at the surface where the cavity is formed,
The hollow fiber molded article according to claim 1, wherein a liquid-permeable material covering the surface where the cavity is formed is disposed, and the fiber slurry is sucked through the flow passage to form the fiber laminate on the surface of the liquid-permeable material. Manufacturing method. 3. A step of immersing a part of a set of split molds in a fiber slurry to form a fiber laminate on the surface of the split mold, and a step of disposing a core so as to cover the fiber laminate. , A step of immersing the remaining split mold of the set of split molds in the fiber slurry to make another fiber laminate on the surface of the split mold, and the set of stacks of the fiber laminates A method of manufacturing a hollow fiber molded body, comprising the step of integrating the respective fiber laminates by combining split molds in a state of being immersed in the fiber slurry. 4. The fiber laminates are integrated by supplying a fluid to the core to expand the core in a papermaking mold formed of the pair of split molds combined with each other. The method for producing a hollow fiber molded body according to claim 3, wherein the fiber molded body is dehydrated and molded. 5. Any one of which the fiber laminate is laminated on the surface
The Kano said split mold in a state placed on the subsurface of the fiber slurry, claim 1 or 3 disposed said core to a portion of該割type
A method for producing the hollow fiber molded article described. Wherein after combining the set of split molds having respective fiber laminate wherein the surface, new hollow fiber molding according to claim 1 or 3 wherein papermaking fibers laminate to each fiber laminate surface Body manufacturing method. 7. The method of claim 1 or 3 placing a weight in said core
A method for producing the hollow fiber molded article described. 8. The hollow fiber molded body is removed from the papermaking mold while the core is arranged in the hollow fiber molded body dehydrated and molded by the core, and then these are arranged in a dry mold, the method according to claim 1 or 3 hollow fiber molded article according to inflate the tang dried molded hollow fiber molded body. 9. A papermaking mold in which a pair of split molds are combined to form a cavity, and a core for forming a hollow fiber molded product by dewatering the fiber laminate produced by each split mold. , Before being made in one of the split molds in the fiber slurry
And a core disposing mechanism for disposing the core on the fiber laminate.
The papermaking die has two or more openings communicating with the outside, and the core is expandable and contractible and bendable so that it can be arranged in the cavity between at least two openings. Fiber molding manufacturing equipment. Wherein said papermaking mold apparatus for producing a hollow fiber molding according to claim 9 and a mold opening and closing Organization for opening and closing a fiber slurry. 11. The hollow fiber molded article according to claim 9 , wherein the cavity of the papermaking mold is formed so as to be bent so that at least one of the openings cannot be seen through from the one opening. apparatus. 12. The method of claim 11, wherein the hollow and dry type fiber molded body is dried, claim 9, the hollow fiber molding dehydrated molded with said core and a shifting unit for shifting to the dry form Manufacturing equipment for hollow fiber moldings.