JPH06316900A - Production of pulp molding and apparatus therefor - Google Patents

Abstract

PURPOSE:To provide a method for production of a pulp molding, capable of obtaining a product accuracy without damage or deformation of a pulp molding when releasing the pulp molding molded from pulp slurry using a mold and to provide an apparatus therefor. CONSTITUTION:A pulp molding 44 on the molding surface 18 of a molding tool 14a or 14b existing at the upper side position is covered with a covering member 48 and a high-temperature gas is supplied from a high-temperature gas generator 66 so as to cover the pulp molding 44. At the same time, the high-temperature gas is sucked through a suction hole 32 and allowed to pass in the direction of the thickness of the pulp molding 44 by making the pressure in the mold 14 negative using a suction unit 42. Thereby, the pulp molding can be rapidly dried without generation of strain.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method and an apparatus for producing a pulp mold from pulp slurry.

[0002]

2. Description of the Related Art When a predetermined product or the like is transported, the product or the like is packed by a packing material having a recess corresponding to the shape of the product or the like. Such a packaging material is usually made of a relatively expensive material such as expanded polystyrene, which increases the cost and makes disposal difficult.

On the other hand, a packing material is manufactured from pulp of waste paper such as corrugated cardboard and newspaper for the purpose of effectively utilizing recovered resources. Such a packing material is called a pulp mold. There is. Such a pulp mold usually has a molding surface having a corresponding shape and has a large number of suction holes opened in the molding surface, and the molding surface of the molding die is placed in pulp slurry. It is manufactured by sucking from a suction hole in a dipped state and adsorbing pulp to its molding surface, and by releasing from the molding die and then drying with hot air in a drying furnace.

[0004]

However, since the pulp mold immediately after being molded from the pulp slurry has a high water content as described above, if the mold releasing operation of the pulp mold is attempted immediately, damage or deformation is likely to occur. There was a drawback. Further, when the pulp mold which has been released is rapidly dried by hot air, it is difficult to uniformly obtain a dry state between the surface and the inside of the pulp mold, and thus the pulp mold is apt to be deformed such as warp or distortion. However, there is a drawback that the dimensional accuracy of the manufactured pulp mold is impaired.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to prevent damage or deformation at the time of releasing a pulp mold molded from pulp slurry using a molding die. It is an object of the present invention to provide a method and an apparatus for manufacturing a pulp mold which can prevent the above-mentioned problems and can sufficiently obtain the dimensional accuracy of the manufactured pulp mold.

[0006]

The first object of the present invention to achieve the above object is to provide a method for producing a pulp mold from pulp slurry, which comprises (a) forming a large number of suction holes. A molding step of immersing a molding die opened in the surface into the pulp slurry and sucking the pulp in the pulp slurry into the molding surface by sucking from the suction hole, and (b) following the molding step, A step of covering the molding surface of the molding die with a drying gas, and (c) a drying step of passing the drying gas in the thickness direction of the pulp mold by sucking the drying gas from the suction hole of the molding die. Is included.

[0007]

According to the method of manufacturing a pulp mold having such a structure, the pulp mold on the molding surface formed by adsorbing the pulp in the pulp slurry in the molding step,
The drying gas is passed through the pulp mold in the thickness direction by being covered with the drying gas and being sucked through the suction holes of the molding die in the drying step.

[0008]

Therefore, the pulp mold on the molding surface can be quickly dried to a relatively low water content which is not deformed or damaged at the time of releasing from the mold and is not distorted by the subsequent drying. Thereby, damage and deformation of the pulp mold at the time of release can be suitably prevented, and dimensional accuracy of the dried pulp mold can be suitably obtained. In addition,
Since the pulp mold is dried in close contact with the molding surface and is relatively uniformly dried in the thickness direction by the drying gas passing in the thickness direction, deformation of the pulp mold in a high moisture state is suppressed. Therefore, high dimensional accuracy can be obtained.

[0009]

[Second Means for Solving the Problems] Further, the gist of an apparatus for suitably carrying out the method of the invention is as follows.
An apparatus for manufacturing a pulp mold from pulp slurry, comprising: (a) a mold having a large number of suction holes opened on a molding surface, immersing the mold in pulp slurry and sucking from the suction holes. A molding device for adsorbing the pulp in the pulp slurry to the molding surface by (b) a cover device for covering the mold pulled up from the pulp slurry, and a drying gas for supplying a drying gas into the cover device. A supply device, and a drying device that allows the drying gas to pass through in the thickness direction of the pulp mold by sucking the drying gas from the suction holes of the mold located in the cover device. Especially.

[0010]

According to the pulp mold manufacturing apparatus having such a structure, the pulp mold on the molding surface formed by adsorbing the pulp in the pulp slurry in the molding apparatus is
It is covered by the cover device and the cover device is supplied with the drying gas from the drying gas supply device and covered with the drying gas. Then, by being sucked through the suction holes of the molding die, the drying gas is passed in the thickness direction of the pulp mold.

[0011]

As a result, the pulp mold on the molding surface can be quickly dried to a relatively low water content which is not deformed or damaged at the time of releasing from the mold and is not distorted by the subsequent drying. Thereby, damage and deformation of the pulp mold at the time of release can be suitably prevented, and dimensional accuracy of the dried pulp mold can be suitably obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing a preferred example of a pulp mold manufacturing apparatus to which the pulp mold manufacturing method of the present invention is applied. This pulp mold manufacturing apparatus includes a molding device 4, a first drying device 6, and a second drying device 8.

In FIG. 1, in a pulp mold forming apparatus 4, a pulp slurry 12 in a slurry state in which about 1% pulp is dispersed in water is stored in a liquid tank 10.
A pair of molding dies 14a and 14b having the same configuration are alternately immersed in the pulp slurry 12. That is, the molding dies 14a, 14b are mounted on the bases 20a, 2
0b is integrally attached to the upper surface of the base 0a, and support arms 24a and 24b are integrally provided on the surfaces of the bases 20a and 20b opposite to the molding dies 14a and 14b.

A rotary shaft 28 is rotatably supported above the liquid tank 10 by a supporting device (not shown) with its axis centered at right angles to the paper surface of FIG.
The support arms 24a and 24b of a and 14b are fixed to the rotary shaft 28, respectively, so that the molding dies 14a and 14b
Are supported by the rotating shaft 28 in a state of being shifted from each other by 180 degrees. The molding dies 14a and 14b are alternately rotated between an upper position and a lower position by being rotationally driven by 180 degrees by a driving device (not shown), and are positioned at the lower position in FIG. 14b is immersed in the pulp slurry 12 in the liquid tank 10. The molding die 14
Although not shown, the molding surfaces 18 of a and 14b are integrally provided with a mesh member such as a wire mesh so as to cover the molding surface 18 in order to prevent clogging of pulp in the suction holes 32. There is.

As shown in FIG. 2 for the molding die 14b, the molding dies 14a and 14b each have a recess 30 on the surface on the base 20 side, and the molding surface 18 is formed.
And a large number of suction holes 32 that connect the recesses 30 to each other. Recesses 30 in molds 14a and 14b
Is a hole 36 in the base 20, a hole 38 in the support arms 24a and 24b, a passage (not shown) provided in the rotary shaft 28, and pipes 40a and 40b communicating with the passage in the rotary shaft 28 in a relatively rotatable manner. The suction device 42 and the compressor 43 are connected via the switching valves 34a and 34b, respectively.

In the pulp mold molding apparatus 4 configured as described above, one of the pair of molding dies 14a and 14b positioned at the lower position, that is, the molding die 1 in FIG.
4b is dipped in the pulp slurry 12 of the liquid tank 10 and is sucked from the suction hole 32 of 14b by the suction device 42 so that the recess 30 is kept at a negative pressure for a predetermined time. The pulp is adsorbed on the molding surface 18 of the mold 14b. Therefore, on the molding die 14b,
A pulp mold 44 (see FIG. 2) having a shape corresponding to the uneven shape of the molding surface 18 and having a thickness of, for example, about 2 mm is molded. Next, while continuing the suction of the molding die 14b, the molding dies 14a and 14b are rotated 180 degrees to position the other molding die 14a at the lower position, and suction is performed from the suction hole 32 of the molding die 14a in the same manner as above. By
The molding of the pulp mold 44 is started on the molding die 14a, and the molding die 1 positioned at the upper position is also started.
The pulp mold 44 on 4b is subjected to first drying by the first drying device 6 in order to quickly reduce the water content.

The first dryer 6 has a container-like shape having a peripheral wall 46 and a bottom wall 47, and is a metal cover member 48 for covering the mold 14a or 14b at the upper position.
A cover supporting device 50 for supporting the cover member 48 and moving the cover member 48 in the up-down direction and in the circumferential direction around the rotation center C by an actuator (not shown), and for supplying a drying gas into the cover member 48. And duct piping 62 of. The cover member 48 is moved from the position where the cover supporting device 50 covers the molding die 14a or 14b at the upper position from above (the position shown in FIG. 1) and the covering position so as not to interfere with the rotating molding die 14a or 14b. After moving a predetermined distance upward, for example, it is driven to a retracted position where it moves a predetermined distance in a direction perpendicular to the plane of FIG.

A far-infrared heater 52, which is made of metal and has a plate shape, is integrally provided in a portion located inside the cover member 48 and near the bottom wall 47 thereof. The far-infrared heater 52 is formed with a large number of outlets 56 penetrating in the plate thickness direction, and a ceramic coating (not shown) is formed on a surface 58 of the far-infrared heater 52 opposite to the bottom wall 47. It is coated. This ceramic coating is formed by, for example, applying ceramic powder such as zirconia, zircon, alumina, titania, manganese oxide, or cobalt oxide to the surface 58 of the far infrared heater 52 by coating or plasma spraying. It emits far-infrared rays having a longer wavelength than infrared rays.

The chamber 59 formed between the bottom wall 47 of the cover member 48 and the far-infrared heater 52 has a hole 60 formed in the peripheral wall 46 of the cover member 48 and a duct pipe 6.
2, connected to a high temperature gas generator 66 via a duct pipe 63 and a circulation fan 64. The high-temperature gas generator 66 includes a burner 68 and a combustion chamber 70, and the fuel supplied to the burner 68 together with air is burned in the combustion chamber 7.
By being burned in 0, for example, 150 ℃ ~
A high temperature gas (combustion gas) of about 300 ° C is generated. The high temperature gas generated in the combustion chamber 70 is fed into the chamber 59 by the circulation fan 64 through the duct pipes 63 and 62. As a result, the pulp mold 44 on the upper mold 14 is positioned in the high temperature gas atmosphere fed into the chamber 59 and covered with the high temperature gas, and at the same time, due to the negative pressure in the recess 30. The high-temperature gas penetrates through the pulp mold 44 in the thickness direction, is sucked by the suction holes 32, and is rapidly dried. Further, since the far infrared heater 52 is heated by the high temperature gas, the far infrared rays are radiated from the ceramic coating and the far infrared rays heat the pulp mold 44 to a relatively inner portion, so that the pulp mold 44 is more quickly. To be dried.

The opening side space 72 of the cover member 48
Is connected to the combustion chamber 70 via a hole 74 provided in the peripheral wall 46 and a duct pipe 76, whereby the opening side of the cover member 48 according to the negative pressure in the combustion chamber 70 by the circulation fan 64. A part of the hot gas in the space 72 is returned to the combustion chamber 70 for reuse. In this embodiment, the high temperature gas corresponds to the drying gas.

Drying of the pulp mold 44 on the molding die 14a or 14b by the first drying device 6 is performed for a period of, for example, about 30 seconds, whereby the pulp mold 44 is dried to a moisture content of, for example, about 55%. To be When the pulp mold 44 has a water content of about 55% in this way, the bond between the pulps becomes strong and deformation or damage is less likely to occur, and the mold releasing work becomes extremely easy and easy, and in the subsequent second drying. Also, since the water content is already low, distortion is unlikely to occur even with hot air. The pulp mold 44 has a property that it becomes difficult to deform when the water content thereof is about 60%. Incidentally, in the past, the pulp mold 44 on the upper mold 14a or 14b was released from the mold after dehydration by suction for about 30 seconds, but the water content was only about 75% to 80%, Since the bond between them is weak, deformation and damage are likely to occur, the mold release work is extremely difficult, and since the water content is still high in the subsequent second drying, distortion is likely to occur due to hot air. The accuracy could not be obtained.

When the first drying is completed, the cover member 4
After 8 is driven to the retracted position, the pulp mold 44 is released from the molding dies 14a or 14b by, for example, the transport device 80 having a plurality of adsorption rubbers 78 and movable vertically and horizontally. , Second
It is conveyed onto the endless annular conveyor belt 82 of the drying device 8. During a predetermined period from immediately before the mold is released from the mold 14 until it is immersed in the pulp slurry 12, the switching valve 34a or 34b is operated by a control device (not shown), so that the compressed air from the compressor 43 is compressed. Is supplied to the mold 14a or 14b located at the upper position, and compressed air is jetted from the suction hole 32.

Then, the molding dies 14a and 14b described above are used.
Of pulp mold 44 by, pulp mold 44
The first drying on the molding dies 14a and 14b, and the release of the pulp mold 44 therefrom are to be repeatedly performed while the pair of molding dies 14a and 14b are intermittently rotated in a predetermined cycle, The released pulp mold 44 is sequentially placed on the conveyor belt 82.

The conveyor belt 82 is rotated clockwise in FIG. 1 by a drive unit (not shown), whereby the pulp mold 44 placed on the conveyor belt 82 is placed in a horizontal drying oven 84. Is being introduced to. Inside the drying oven 84,
A plurality of bottomed cylindrical members 86 (three upper and lower in FIG. 1) are provided at predetermined intervals along both sides of the conveyor belt 82 in the drying furnace 84 in the vertical direction. A plurality of air outlets (not shown) penetrating in the thickness direction are formed in the peripheral wall of each of the cylindrical members 86, and the duct pipes 88, 90, the duct pipe 63, and the like are provided in each cylindrical member 86. It is connected to the circulation fan 64 and the high temperature gas generator 66 via the above. As a result, the high temperature gas from the combustion chamber 70 of the high temperature gas generator 66 is blown out from the air outlet of the cylindrical member 86, whereby the pulp mold 44 on the conveyor belt 82 is dried from both sides in the vertical direction and dried. The second drying is performed until the water content is, for example, about 10% before being discharged from the furnace 84. The conveyor belt 82 has a cylindrical member 86 located therebelow.
In order to let the hot air from the inside pass, a member having a large number of through holes (not shown) penetrating in the thickness direction (for example, a perforated steel plate or a wire mesh) is provided. Drying oven 8
4 of the conveyor belt 82 has a pair of holes 9
2, 94 are provided. An exhaust fan 98 is connected to one hole 92 via a duct pipe 96,
A part of the gas in the drying furnace 84 is exhausted together with the steam by the exhaust fan 98, and the other hole 94 is communicated with the combustion chamber 70 through a duct pipe 100. The drying oven 8
Part of the relatively high temperature gas in 4 is returned to the inside of the combustion chamber 70 for reuse.

As described above, according to this embodiment, the molding die 1
In the cover member 48, the pulp mold 44 on the molding surface 18 molded from the pulp sludge 12 in
By sucking through the suction holes 32 of the molding die 14 in a state of being covered with the high temperature gas from 0, the high temperature gas is passed through the inside of the pulp mold 44 in the thickness direction as the pulp mold 44 is dehydrated under reduced pressure. Since the far-infrared rays emitted from the far-infrared heater 52 further heat the pulp mold 44, the pulp mold 44
Rapid drying is performed by hot air passing through in the thickness direction, and further drying is promoted by far infrared rays, so that the pulp mold 44 on the molding surface 18 has a relatively low water content of about 55% in a relatively short time of about 30 seconds. It can be suitably dried up to the rate. In this case, since the pulp mold 44 has a property of being less likely to be deformed when the water content thereof is about 60%, damage and deformation at the time of mold release of the pulp mold 44 can be preferably prevented, and at the same time, the mold release can be prevented. Even when the subsequent pulp mold 44 is dried relatively quickly by hot air in the drying furnace 84, its deformation can be preferably prevented.

In the conventional method, the pulp mold on the mold is dried under reduced pressure for about 30 seconds to a water content of about 75% to 80% and then dried in a drying furnace. According to this embodiment,
The pulp mold 44 on the molding die 14 is configured to be dried in a drying furnace 84 after being dried to a water content of about 55% in the same time as the conventional one, and
Since the amount of high temperature gas required for drying on the molding die 14 is significantly smaller than the amount of high temperature gas required for drying in the drying oven 84, the drying oven 84 is much smaller than the conventional case. In addition, there is an advantage that an energy saving effect can be suitably obtained.

Further, according to the present embodiment, the pulp mold 44 is dried while being in close contact with the molding surface 18 of the molding die 14 and is relatively uniformly dried in the thickness direction by far infrared rays and hot air passing in the thickness direction. Therefore, there is almost no possibility that the pulp mold 44 will be deformed during drying on the molding surface 18, and thus the deformation during drying of the pulp mold 44 can be more reliably prevented.

Further, according to this embodiment, since compressed air is jetted from the suction hole 32 when the pulp mold 44 is released, not only the pulp mold 44 is easily released but also the inside of the suction hole 32 is removed. Small pulp is released and suction hole 3
2 has the advantage of being cleaned.

Further, according to this embodiment, the cover member 48
Since a part of the high-temperature gas supplied into the drying furnace 84 is also returned to the combustion chamber 70 and reused, there is an advantage that the running cost of the drying device can be suitably reduced.

Next, another embodiment of the present invention will be described with reference to FIG. In the following description, the same parts as those in the above-described embodiment will be designated by the same reference numerals and the description thereof will be omitted.

In FIG. 3, a rotating body 102 having an octagonal outer peripheral shape is provided rotatably around a shaft 104, and the rotating body 102 is rotated by 45 degrees clockwise in a predetermined cycle in FIG. 3 by a driving device (not shown). It can be rotated intermittently. Eight molding dies 14 are integrally attached to the outer peripheral surface of the rotating body 102 at predetermined intervals, and a suction passage 106 communicating with the recess 30 is connected to each molding dies 14. Together with each mold 1
The four suction passages 106 are independently connected to a suction device (not shown). In FIG. 3, the numbers (1) to (3) respectively indicate the rotational positions of the rotating body 102 around the shaft 104, and in FIG. 3, suction is performed in the mold 14 by the vacuum pump only at the four rotational positions (1) to (4). Has become. Mold 1 in the rotating position
4 is dipped in the pulp slurry 12 of the liquid tank 10 and the inside of the mold 14 is sucked, so that the mold 14
A pulp mold 44 (not shown) is molded on the molding surface 18 of the above, and at the rotating position, the suction is continued and the pulp mold 44 on the mold 14 is dehydrated under reduced pressure.

At the next rotation position, the pulp mold 44 on the molding die 14 is dried by the far infrared rays and the high temperature gas while the above-mentioned dewatering under reduced pressure is continued. That is, the cover member 48 is provided so as to be able to approach and separate from the mold 14 in the rotational position, and the cover member 48 is moved from the retracted position shown by the solid line in FIG. As the cover member 48 is advanced, the pulp mold 44 on the mold 14 is covered. Cover member 48
The flat far-infrared heater 52 provided inside is not provided with the air outlet 56 of the above-described embodiment, and the high temperature gas sent from the combustion chamber 70 of the high temperature gas generator 66 to the chamber 59 is It is adapted to be introduced into the opening side space 72 of the cover member 48 via the pipe 108. As a result, the pulp mold 44 on the molding surface 18 is heated by the far infrared rays from the ceramic film coated on the surface 58 of the far infrared heater 52, and the pulp mold 4 is also heated.
With 4 being covered with the high temperature gas, the high temperature gas is dried by passing through the inside of the pulp mold 44 in the thickness direction as the suction holes 32 suck.

Although not shown, the cover member 48 is provided so as to be able to approach and separate from the molding die 14 at the rotational position subsequent to the above-described rotational position, which is not shown in the drawing. Similarly, drying is performed with the pulp mold 44 on the molding die 14 being covered. At the next rotation position, suction in the molding die 14 is blocked, and after the pulp mold 44 on the molding die 14 is adsorbed and released by the conveying device 80, the conveyor belt of a drying furnace (not shown) is placed. It is supposed to be transported to.

In this embodiment, decompression and dehydration of the pulp mold 44 on the molding surface 18 is continued at the rotational positions of the rotary member 102 in accordance with the rotation of the rotary member 102, and hot air is blown in the thickness direction of the pulp mold 44 at the rotational position and. Since the pulp mold 44 is passed through, it is possible to secure a sufficiently long drying time by vacuum dewatering and hot air passage.
Since it can be dried to a lower water content on the molding die 14, damage and deformation at the time of mold release of the pulp mold 44 can be more reliably prevented, the drying furnace can be made more compact, and the energy-saving effect can be further suitably adjusted. can get. Further, the drying operation of the pulp mold 44 on the molding die 14 and the releasing operation of the pulp mold 44 are performed by the rotating body 102.
Since it can be simultaneously performed in another rotation position of the above, there is an advantage that the molding cycle of the pulp mold 44 can be suitably increased.

Although one embodiment of the present invention has been described above with reference to the drawings, the present invention can be applied to other modes.

For example, in the above-mentioned embodiment, the pulp mold 44 on the molding die 14 is explained to be dried to the water content of about 55% in the same time as in the conventional case, but this is not always necessary. The pulp mold 44 on the molding die 14 is 75% similar to the conventional one in a shorter time than the conventional one.
The water content may be dried to about 80% and then dried in a drying oven, or may be dried to a lower water content, for example, about 65% in a shorter time than before, and then dried in a drying oven. You may allow it. In the former case, the effect of increasing the molding cycle of the pulp mold 44 can be obtained, while in the latter case, the same effect as that of the above-described embodiment can be obtained to some extent, and in addition, the molding cycle of the pulp mold 44 can be increased. The effect that can be increased is obtained.

Further, in the above embodiment, the drying gas is composed of the high temperature gas generated by combustion, but the drying gas is composed of the gas of relatively low temperature (for example, room temperature) adjusted to low humidity. It is also possible to do so.

Further, in the above embodiment, the pulp mold 44 on the molding surface 18 is configured to be dried by the far infrared rays from the ceramic coating of the far infrared heater 52, but the drying by the far infrared rays is not always required. It does not have to be done.

Further, in the embodiment shown in FIG. 3, the molding die 14 is used at the rotational position of the rotating body 102, etc.
In order to prevent the suction holes 32 from being clogged, air may be blown out from the suction holes 32.

In the above embodiment, the pulp mold 44 may be mixed with resin, aluminum foil or the like for the purpose of increasing the amount or reinforcing the pulp.

Besides, the present invention can be variously modified without departing from the spirit thereof.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a pulp mold drying device to which a method for drying a pulp mold of the present invention is suitably applied, together with an example of a pulp mold forming device forming a part thereof, showing the configuration. is there.

FIG. 2 is an enlarged cross-sectional view of a molding die and the like in FIG.

FIG. 3 is a diagram for explaining another example of the present invention,
It is a figure corresponding to FIG.

[Explanation of sign]

 4: Molding device 6: First drying device 12: Pulp slurry 14a. 14b: Mold 18: Molding surface 32: Suction hole 44: Pulp mold 48: Cover member (cover device) 62: Duct piping (drying gas supply device)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsunori Kawachi 3-36 No. 1 Noritake Shinmachi, Nishi-ku, Nagoya-shi, Aichi Noritake Company Limited

Claims (2)

[Claims] 1. A method for producing a pulp mold from pulp slurry, which comprises immersing a mold having a large number of suction holes on the molding surface in the pulp slurry and sucking the mold through the suction holes to form a molding surface on the molding surface. A forming step of adsorbing the pulp in the pulp slurry; a step of covering the forming surface of the forming die with a drying gas subsequent to the forming step; and sucking the drying gas from a suction hole of the forming die. And a drying step of allowing the drying gas to pass through in the thickness direction of the pulp mold. 2. An apparatus for producing a pulp mold from pulp sludge, comprising a molding die having a large number of suction holes opened on a molding surface, the molding die being immersed in the pulp sludge and suctioned from the suction holes. A molding device for adsorbing the pulp in the pulp sludge to the molding surface, a cover device for covering the molding die pulled up from the pulp sludge, and a drying gas supply for supplying a drying gas into the cover device. And a drying device that allows the drying gas to pass in the thickness direction of the pulp mold by sucking the drying gas from the suction holes of the mold located in the cover device. An apparatus for manufacturing a pulp mold, characterized by: