JP4010780B2 - Manufacturing method of fiber molded body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for manufacturing a fiber molded body using a core for manufacturing a fiber molded body.
[0002]
[Prior art and problems to be solved by the invention]
For example, the technology of Japanese Patent No. 78600 is known as a related art relating to a method for producing a pulp mold product. In this technology, a solid medium and a bag-shaped medium are placed in an outer mold (papermaking mold), and pulp fibers are deposited on the paper surface of the outer mold to form a wet molded body. A predetermined fluid is supplied into the middle mold to expand the middle mold, and the molded body is pressed against the paper-making surface by the expanded middle mold to dehydrate, and a molded body having a predetermined shape is obtained after demolding and drying. It is a thing.
[0003]
By the way, in the manufacturing method of the above-described pulp mold molded body, the portion pressed by the bag-shaped middle mold is densified to obtain high strength, but the other portions tend to have uneven thickness and density, and are dehydrated. After drying, the molded product may have uneven thickness and density, and non-uniform physical properties such as strength associated with the unevenness.
[0004]
Accordingly, an object of the present invention is to provide a method and an apparatus for manufacturing a fiber molded body that can be manufactured with high shape accuracy while suppressing wall thickness and density unevenness.
[0005]
[Means for Solving the Problems]
The present invention relates to a hollow bag-shaped core that can be expanded and contracted in a fiber laminate having an opening disposed in a production mold and a cavity branched from the opening, and a tip inserted into the core. A pressing means having an air supply / exhaust pipe provided with an elastic member at a part thereof is inserted from the opening, the pressing means is disposed in the cavity, and the medium is passed through the air supply / exhaust pipe of the pressing means. The object is achieved by providing a method for manufacturing a fiber molded body comprising a step of supplying a fluid into the core and expanding the core to press the fiber laminate against the inner surface of the mold. It is.
[0006]
Moreover, this invention is a manufacturing apparatus of the fiber molded object used for implementation of the said invention, Comprising: It inserts in the fiber laminated body arrange | positioned in the production type | mold, and presses the area | region where the inner surface of this fiber laminated body is different. A hollow bag-like core in which at least one of the pressing means is freely expandable / contractable, and an air supply / exhaust pipe inserted into the core and provided with an elastic member at a distal end portion thereof. The object is achieved by providing an apparatus for producing a fiber molded body comprising
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
[0009]
Figure 1 shows a referential embodiment of applying the apparatus for producing a fiber molded article of the present invention apparatus for producing a pulp molded article having two openings. In FIG. 1, the code | symbol 1 has shown the manufacturing apparatus.
[0010]
As shown in FIG. 1, the manufacturing apparatus 1 includes a papermaking mold 2 and two pressing means that are inserted into a fiber laminate 4 made in the manufacturing mold 2 and press different areas on the inner surface of the fiber laminate 4. 3 and 3.
[0011]
The production mold 2 is a combination of two split molds (only one is shown in the figure) 20 to form a predetermined cavity 21 corresponding to the outer shape of the fiber laminate 4 having two openings. is there.
[0012]
A large number of fluid flow holes 23 are formed in the split mold 20 so as to open on the formation surface 22 of the cavity 21 and communicate with the outside of the split mold 20. Further, the split mold 20 is formed with a recess 24 through which the later-described slurry injection port is formed through the cavity 21 when the split molds 20 are combined. Although not shown in the drawing, the formation surface 22 of the cavity 21 is covered with a paper making net (not shown) having a predetermined wire diameter and mesh, and the formation surface 22 of the cavity 21 is covered with the formation surface 22 of the cavity 21. A lattice-like groove connecting the fluid circulation holes 23 is formed.
[0013]
The pressing means 3 includes a hollow bag-shaped core 30 that can be expanded and contracted, and a supply / exhaust pipe 31 inserted into the core 30.
The manufacturing apparatus 1 supplies a supply source of pressurized fluid and a discharge source (both not shown) that sucks and discharges pressurized fluid through a switching cock (not shown) at the upper end of the supply / exhaust pipe 31. It has.
[0014]
The core 30 can be made of any material that expands and contracts and its volume changes without particular limitation. However, from the viewpoint of durability and heat resistance, natural rubber, urethane, fluorine rubber, silicone rubber, or elastomer can be used. It is preferable to use one made of an elastic material made of synthetic rubber or the like.
[0015]
Next, based on the embodiment in which the reference embodiment of the method for manufacturing a fiber molded body of the present invention is applied to the manufacture of a pulp mold container (fiber molded body) having two openings using the manufacturing apparatus 1, This will be described with reference to the drawings.
[0016]
First, as shown in FIG. 2A, the papermaking mold 2 including a pair of split molds 20 and 20 is prepared. Then, a predetermined amount of pulp slurry is injected into the cavity 21 through the slurry injection port 24. At the same time, the inside of the cavity 21 is sucked under reduced pressure toward the outside of the papermaking mold 2 through the fluid circulation hole 23 to suck moisture in the pulp slurry, and pulp fibers are formed on the papermaking net covering the papermaking surface, that is, the inner surface of the cavity 21 To deposit. As a result, a fiber laminate (wet fiber molded body) 4 having two openings 40 on which pulp fibers are deposited is formed on the papermaking net.
[0017]
In the present invention, the slurry used for papermaking of the fiber laminate 4 is preferably composed only of pulp fibers and water. 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 vegetable fibers, polysaccharides, etc. It may contain components. The blending amount of these components is preferably 1 to 70% by weight, particularly 5 to 50% by weight, based on the total amount of pulp fibers and the components. In addition, a pulp fiber dispersant, a molding aid, a coloring agent, a coloring aid, and the like can be appropriately added to the slurry. A sizing agent, pigment, fixing agent and the like can be appropriately added to the slurry.
[0018]
Next, the formed fiber laminate 4 is subjected to a pressure dehydration step. As shown in FIGS. 1 and 2 (b), the papermaking mold 2 is sucked from the inside through the fluid circulation hole 23 toward the outside, and the two cores 30 are contracted into the fiber laminate 4 in the contracted state. Insert from each opening 40.
[0019]
When inserting the cores 3 and 3 into the fiber laminate 4, it is preferable to insert them simultaneously from the viewpoint of shortening the machine operation time (cycle up) and simplifying the mechanism for operating the core. It is preferable to insert sequentially in order to ensure the operation.
[0020]
Next, as shown in FIG. 2 (c), a predetermined pressurized fluid is supplied into the core 30 through the air supply / exhaust pipe 31 to bulge the core 30. By pressing the fiber laminate 4 toward the formation surface 22 of the cavity 21 by these bulged cores 30, the fiber laminate 4 is uniformly pressed from the inside, and the dehydration proceeds and the fiber laminate The shape of the inner surface of the cavity 21 is transferred to the body 4.
[0021]
Examples of the fluid used for expanding the core 30 include air (pressurized air), hot air (heated pressurized air), steam, superheated steam, oil (heated oil), and other various liquids. Is done. In particular, air, hot air, and superheated steam are preferably used from the viewpoint of operability. The pressure at which the fluid is supplied into each elastic body can be appropriately set according to the molded body that resists dehydration, but is preferably 5 × 10 ^{3 to} 5 × 10 ⁶ Pa, and preferably 1 × 10 ^{4 to} 3. X10 ⁶ Pa is more preferable, and 1 × 10 ^{5 to} 7 × 10 ⁵ Pa is even more preferable.
[0022]
When the fiber laminate 4 can be dehydrated to a predetermined moisture content and the shape of the inner surface of the cavity 21 is sufficiently transferred to the fiber laminate 4, as shown in FIG. 2 (d), negative pressure suction through the fluid circulation hole 23 is performed. Is stopped, the fluid in the core 30 is discharged, and the core 30 is reduced.
Then, the reduced core 30 is taken out from the fiber laminate 4, and the split molds 20 and 20 are further opened to take out the fiber laminate 4 having a predetermined moisture content from the papermaking die 2.
[0023]
The removed fiber laminate 4 is then subjected to a heat drying process. In the heat-drying process, the same operation as the paper-making / dehydrating process shown in FIG. 2 is performed except that a heated heating mold is used without paper-making / dehydrating.
[0024]
That is, first, as shown in FIG. 3 (a), a drying mold 5 is prepared which includes a pair of split molds 50 and 50, and in which a cavity 51 having a predetermined shape is formed by combining the split molds. And in this cavity 51, the fiber laminated body 4 shape | molded by the above-mentioned papermaking method is accommodated. The drying mold 5 is preheated to a predetermined temperature by a heating element (not shown) disposed in the split molds 50 and 50.
[0025]
Next, as shown in FIG. 3 (b), the pressing means 6 having a bag-shaped core 60 that can be expanded and contracted is provided in a state in which the drying mold 5 is sucked from the inside to the outside through the fluid circulation hole 53. The fiber laminate 4 is inserted through the opening 40. The pressing means 6 can be the same as that used in the dehydration step.
[0026]
When inserting the core 60 into the fiber laminate 4, as in the dehydration step, it is possible to insert at the same time from the viewpoint of shortening the machine operating time (cycle up) and simplifying the mechanism for operating the core. Preferably, it is preferable to insert the cores sequentially from the viewpoint of reliably operating the core.
[0027]
Next, as shown in FIG. 3C, pressurized fluid is supplied into the core 60 to expand the core 60, and the fiber stack 4 is formed on the formation surface 52 of the cavity 51 by the expanded core 60. Press. The fiber laminate 4 is pressed against the formation surface 52 of the cavity 51 by the expanded core 60, and the drying of the fiber laminate 4 proceeds and the inner shape of the cavity 51 is transferred to the fiber laminate 4. Thus, since the fiber laminate 4 is pressed against the forming surface 52 of the cavity 51 from the inside to the outside of the fiber laminate 4, even if the shape of the cavity 51 is complicated, the fiber laminate is highly efficient. 4 is dried, and the shape of the formation surface 52 of the cavity 51 is transferred to the fiber laminate 4 with high accuracy.
[0028]
As the pressurized fluid used to expand the core 60, for example, compressed air (heated air), oil (heated oil), and other various liquids are used. The pressure for supplying the pressurized fluid is preferably 5 × 10 ^{3 to} 5 × 10 ⁶ Pa, more preferably 1 × 10 ^{4 to} 3 × 10 ⁶ Pa, and more preferably 1 × 10 ^{5 to} 7 More preferably, it is × 10 ⁵ Pa.
[0029]
When the fiber laminate 4 is sufficiently dried to a predetermined moisture content, as shown in FIG. 3D, the negative pressure suction through the fluid circulation hole 53 is stopped and the pressurized fluid in the core 60 is drained, The core 60 is reduced. Next, the reduced core 60 is taken out from the fiber laminate 4, and the split molds 50 and 50 are further opened to take out the fiber laminate (fiber molded body) 4 from the drying die 5.
[0030]
Thus, in the manufacturing method of the fiber laminated body of this embodiment using the manufacturing apparatus 1, in the spin-drying | dehydration and drying process of the fiber laminated body 4, two hollow cores 30 which can be expanded and contracted are combined, Since the fiber laminate 4 having the opening 40 can be uniformly pressed from the inside thereof, it is possible to produce a molded body with high molding accuracy without thickness and density unevenness.
[0031]
FIG. 4 shows an embodiment in which the apparatus for manufacturing a fiber molded body of the present invention is applied to a apparatus for manufacturing a hollow pulp mold container (fiber molded body) having a handle formed by a hollow portion branched from an opening. It is a thing. In FIG. 1, reference numeral 1 ′ indicates a manufacturing apparatus.
[0032]
As shown in FIG. 4, the production apparatus 1 ′ is inserted into the papermaking mold 2 ′ and the fiber laminate 4 ′ produced in the production mold 2 to press different areas on the inner surface of the fiber laminate 4 ′. Two pressing means 3 ', 3 "are provided.
[0033]
The production mold 2 ′ has an outer shape of a hollow fiber laminate having a handle formed by a hollow portion branched from an opening by combining two symmetrical split molds (only one is shown in the figure) 20 ′. A corresponding predetermined cavity 21 ′ is formed.
[0034]
A large number of fluid flow holes 23 ′ are formed in the split mold 20 ′ and open on the formation surface 22 ′ of the cavity 21 ′ and communicate with the outside of the split mold 20 ′. Further, the split mold 20 ′ is formed with a recess 24 ′ through which a slurry injection port described later is formed through the cavity 21 ′ when the split molds 20 ′ are combined. Although not shown in the figure, the formation surface 22 'of the cavity 21' is covered with a papermaking net (not shown) having a predetermined wire diameter and mesh, and the formation surface of the cavity 21 '. A grid-like groove connecting the fluid circulation holes 23 'is formed in 22'.
[0035]
The pressing means 3 'includes a hollow bag-shaped core 30' that can be expanded and contracted, and a supply / exhaust pipe 31 'inserted into the core 30'.
The pressing means 3 ″ includes a hollow bag-shaped core 30 ″ that can be expanded and contracted, and a supply / exhaust pipe 31 ″ inserted into the core 30 ″. The supply / exhaust pipe 31 ″ has a configuration in which an elastic member 310 ″ is spirally wound around the outer periphery of a tip portion of a pipe through which a fluid flows, and the tip portion is bendable. Thereby, the core 30 ″ is configured to be expandable / contractable and bendable.
[0036]
For the cores 3 ′ and 30 ″, the same material as the core 3 in the above embodiment can be used.
[0037]
The manufacturing apparatus 1 ′ has a supply source of pressurized fluid and a discharge source that sucks and discharges pressurized fluid through a switching cock (not shown) at the upper end of the supply / exhaust pipes 31 ′, 31 ″. (Both not shown).
[0038]
The cores 30 ′ and 30 ″ can be made of the same material as the core 30 in the manufacturing apparatus 1 of the above embodiment.
[0039]
Next, a preferred embodiment of the method for producing a fiber molded body of the present invention is a hollow pulp mold container (fiber molded body) having a handle formed by a hollow portion branched from an opening using the production apparatus 1 ′. A description will be given based on one embodiment applied to the manufacture of the above.
[0040]
First, in each of the symmetrical split molds 20 ′, the vertical half fiber laminates 4 ′ are individually made in advance, and then the split mold 20 ′ is butted at the butting surface 25 ′. In this case, after matching the split molds 20 ′, the pulp slurry is injected in the same manner as in the above embodiment, and the pulp fibers are stacked and accumulated inside so as to close the joints between the longitudinal fiber stacks 4 ′. It is preferable to make it.
[0041]
Then, as shown in FIG. 4, the cores 3 ″ and 3 ′ are sequentially inserted from the opening 40 ′ of the container 4 ′. In this case, the bendable supply / exhaust pipe can be pressed so that the handle 42 ′ can be pressed from the inside. A core 3 "having 31" is disposed in a cavity 41 'forming a handle 42'.
[0042]
Next, a predetermined pressurized fluid is supplied into the cores 30 ′, 30 ″ through the air supply / exhaust pipes 31 ′, 31 ″ to bulge the cores 30 ′, 30 ″. While bulging and pressing substantially the entire housing portion of the fiber laminate 4 ′ from the inside, the core 30 ″ is bulged and the cavity 41 ′ is pressed from the inside so that the fiber laminate 4 ′ The paper is uniformly pressed toward the cavity forming surface 22 ′ of the papermaking mold 2 ′, and the dehydration proceeds, and the shape of the forming surface 22 ′ of the cavity 21 ′ is transferred to the fiber laminate 4 ′.
[0043]
The fluid used to swell the cores 30 'and 30 "can be the same fluid used to swell the core 3. The pressure for supplying the fluid into each core. Can be appropriately set according to the fiber laminate subjected to dehydration, but is preferably 5 × 10 ^{3 to} 5 × 10 ⁶ Pa, and more preferably 1 × 10 ^{4 to} 3 × 10 ⁶ Pa. It is preferably 1 × 10 ^{5 to} 7 × 10 ⁵ Pa.
[0044]
When the cores 30 ′ and 30 ″ are inserted into the fiber laminate 4 ′ from the opening 40 ′, the machine operating time is shortened (cycle up) and the mechanism for operating the core is simplified as described above. It is preferable to insert from the point at the same time, and it is preferable to insert the cores 30 ″ and 30 ′ in order from the viewpoint of reliably operating the core.
[0045]
In this manner, the cores 30 ′ and 30 ″ are bulged to press the fiber laminate 4 ′ toward the cavity forming surface 22 ′ of the papermaking mold 2 ′, while the fiber lamination is made through the fluid circulation hole 23 ′. By sucking and dehydrating the water in the body 4 ', the fiber laminate 4' is pressed uniformly from the inside, and the dehydration proceeds promptly.
[0046]
When the fiber laminate 4 ′ can be dehydrated to a predetermined moisture content, the negative pressure suction through the fluid circulation hole 23 ′ is stopped, the cores 30 ′ and 30 ″ are separated from the papermaking mold 2 ′, and the split mold is further removed. Open and take out fiber laminated body 4 'which has a predetermined moisture content.
[0047]
The removed fiber laminate 4 ′ is then subjected to a drying process. In the drying process, papermaking and dehydration are not performed, and operations similar to the dehydration process are performed except that a heated dry mold (manufacturing mold) is used.
[0048]
That is, first, a dry mold is prepared which is composed of a pair of split molds and in which a cavity having a predetermined shape is formed by combining the split molds. The fiber laminate 4 ′ formed by papermaking as described above is accommodated in the cavity. The drying mold is preheated to a predetermined temperature by a heating element arranged in the split mold.
[0049]
Next, a core similar to that used in the dehydration step is used, and the core is inserted through the opening 40 ′ of the fiber laminate.
[0050]
When inserting the core, it is preferable to insert it at the same time from the viewpoint of shortening the machine operation time (cycle up) and simplifying the mechanism for operating the core, as in the dehydration process. It is preferable to insert them sequentially from the point of operation.
[0051]
Next, the cores are respectively bulged to press the fiber laminate 4 ′ against the inner surface of the dry mold.
The same fluid as used in the dehydration step can be used as the fluid for expanding the core. Although the pressure which supplies a fluid in each core can be suitably set according to the fiber laminated body with which it uses for drying, it is preferable that it is 5 * 10 < ³ > -5 * 10 < ⁶ > Pa, 1 * 10 < ⁴ >-. 3 × 10 ⁶ Pa is more preferable, and 1 × 10 ^{5 to} 7 × 10 ⁵ Pa is even more preferable.
[0052]
The drying temperature during drying of the fiber laminate 4 ′ is preferably 70 to 300 ° C., more preferably 120 to 250 ° C., from the viewpoint of scorching prevention and drying efficiency of the fiber laminate.
[0053]
In this way, the core is bulged to press the fiber laminate 4 ′ against the inner surface of the drying mold, while the vapor of the fiber laminate 4 ′ is sucked and dried through the fluid circulation hole inside the drying mold. The fiber laminate 4 ′ is uniformly pressed from the inside, and the drying proceeds promptly.
[0054]
When the fiber laminate 4 ′ can be dried to a predetermined moisture content, the core is shrunk, the core is detached from the drying mold, and the split mold is opened to obtain a fiber laminate (fiber molding having a predetermined moisture content). Body) 4 'is taken out.
[0055]
The fiber laminate 4 ′ having finished the drying process is subjected to trimming, coating with a resin layer on the inner and outer surfaces by a so-called skin pack, coating, printing, and the like to complete the manufacturing.
[0056]
As described above, in the fiber laminate manufacturing method of the present embodiment using the manufacturing apparatus 1 ′, the expandable / contractible core 30 ′ and the flexible core 30 ″ can be used in the dehydration and drying processes of the fiber laminate 4 ′. Can be pressed uniformly from the inside of the fiber laminate 4 ′ having a thin hollow portion 41 ′ branched from the opening 40 ′. It is possible to produce a high molded body.
[0057]
The present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the present invention.
[0058]
In the present invention, as in the above-described embodiment, it is preferable to use a plurality of cores in both the dehydration step and the drying step, but it is possible to omit using the core in either the dehydration step or the drying step. .
[0059]
In addition, as in the above-described embodiment, the present invention preferably uses a combination of pressing means each having a core made of a hollow bag-like elastic body, depending on the inner surface shape of the molded body to be manufactured, A pressing means having a core made of a hollow bag-like elastic body and a pressing means having a core made of a solid elastic body are used in combination, or a core made of a solid elastic body is provided. It is also possible to use a combination of pressing means to perform. In particular, when a plurality of cores made of solid elastic bodies are used in combination, the cores are inserted so as to face each other, and the core is bulged in a direction different from the insertion direction to produce a fiber molded body. It is preferable to press against the inner surface.
[0060]
Moreover, in the said embodiment, although the core of the press means was inserted from the same direction in all, the insertion direction can be changed suitably according to the position of the opening part of the fiber molded object to manufacture.
[0061]
The present invention also includes a step of dehydrating a fiber laminate that has been wet-made and placed in a paper-making mold (manufacturing die), and a wet state that is placed in a dry die (manufacturing die), as in the above-described embodiment. Although it can be particularly preferably used in a method for producing a fiber molded body comprising a step of drying the fiber laminate, for example, a fiber containing a thermoplastic resin fiber is mixed by a dry mixing method to obtain a fiber laminate, Also in a method for producing a fiber molded body in which the fiber laminate is placed in a dry mold (manufacturing mold), and a thermoplastic resin fiber is melted to give a predetermined three-dimensional shape corresponding to the inner shape of the dry mold. It can also be applied.
[0062]
In the present invention, it is preferable to use a drying mold that does not have a flow passage as in the above-described embodiment from the viewpoint of leaving no transfer marks on the outer surface of the fiber molded body. When it is possible to leave a transfer mark on the surface, a dry mold having a flow path inside can be used.
[0063]
The present invention can also be applied to the manufacture of a container having two or more cavities branched from an opening.
[0064]
The present invention can also be applied to the production of a fiber laminate having three or more openings.
[0065]
Further, the fiber molded body manufactured by the method for manufacturing a fiber molded body of the present invention is not particularly limited. For example, a container having a cavity branched from an opening, a container having a handle, and a dry copying machine Toner container or the like.
[0066]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method and apparatus of the fiber molded object which can suppress a thickness and a density nonuniformity and can manufacture with a high shape precision are provided.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a reference embodiment in which the apparatus for producing a fiber molded body of the present invention is applied to the production of a pulp mold molded body having two openings (viewed from the side of a split mold butting surface) ).
FIG. 2 is a partial cross-sectional view schematically showing a procedure of a paper making / dehydrating step in a reference embodiment of the method for manufacturing a fiber molded body of the present invention using the manufacturing apparatus of the same embodiment. The figure which shows a process, (b) The figure which shows a dehydration process, (c) is a figure (sectional drawing) which shows the molded object after mold removal.
FIGS. 3A and 3B are diagrams schematically showing a procedure of a drying process in the embodiment, where FIG. 3A is a process of placing a fiber molded body in a drying mold, FIG. 3B is a core insertion process, and FIG. FIG. 4D is a diagram illustrating a pressing drying process, and FIG.
FIG. 4 is a diagram (corresponding to FIG. 1) schematically showing an embodiment in which the apparatus for producing a fiber molded body of the present invention is applied to the production of a container having a hollow portion branched from an opening.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus of a fiber molded object 2, 2 'Papermaking type | mold 20, 20' Split type 3, 3 ', 3 "Press means 30, 30', 30" Core 4, 4 'Fiber laminated body (fiber molded object)
40, 40 'opening 41' cavity 42 'handle

Claims (2)

A hollow bag-shaped core that can be expanded and contracted in a fiber laminate having an opening portion arranged in a manufacturing mold and a hollow portion branched from the opening portion, and an elastic member at a tip portion inserted into the core. A pressing means having an air supply / exhaust pipe provided with a fluid is inserted through the opening, the pressing means is disposed in the cavity, and the fluid enters the core through the air supply / exhaust pipe of the pressing means. A method for producing a fiber molded body comprising a step of supplying the fiber core and expanding the core to press the fiber laminate against the inner surface of the production mold. An apparatus for producing a fiber molded body used for carrying out the method for producing a fiber molded body according to claim 1,
A plurality of pressing means that are inserted into the fiber laminate disposed in the production mold and press different areas of the inner surface of the fiber laminate,
A fiber molded body comprising: a hollow bag-like core in which at least one of the pressing means is freely expandable and contracted; and an air supply / exhaust pipe inserted into the core and provided with an elastic member at a distal end portion. Manufacturing equipment.

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