KR20240106020A - Manufacturing Machine and Method For Cylindrical Activated Carbon Filter - Google Patents

Abstract

The present invention relates to a manufacturing device and method for a cylindrical activated carbon filter, which includes a stirring unit (3) that evenly mixes the powder components that make up the activated carbon filter (F), such as activated carbon and a binder; an extrusion unit (5) that transfers the activated carbon powder supplied from the stirring unit (3) by a transfer screw (33) and heats it by a heater (53) to form a mixture dough; and a molding section (7) for molding a hollow cylindrical activated carbon filter (F) with the mixture dough transferred from the extrusion section (5), wherein the molding section (7) is formed of the extrusion section (5). It is characterized in that the activated carbon filter (F) is molded in the form of a hollow cylinder with a hollow portion (H) formed along the axis with the mixture dough transferred from the mixture. Therefore, when molding the mixture dough into a cylindrical body, the activated carbon filter (F) is formed at the same time as the mixture dough. Since a hollow part can be formed along the axis, it is possible to prevent quality deterioration of the activated carbon filter caused by the core part when the core part rotates with the transfer screw.

Description

Cylindrical activated carbon filter manufacturing device and method {Manufacturing Machine and Method For Cylindrical Activated Carbon Filter}

The present invention relates to a cylindrical activated carbon filter manufacturing apparatus and manufacturing method. More specifically, the present invention relates to a cylindrical activated carbon filter manufacturing apparatus and manufacturing method. More specifically, the mixture dough made by heating and compressing activated carbon powder is formed by a cylindrical mold and a core separately disposed from the transfer screw on the axis of the mold. It relates to a cylindrical activated carbon filter manufacturing apparatus and manufacturing method for molding a hollow cylindrical activated carbon filter so that not only the cylindrical body but also the hollow part is created simultaneously.

In general, a water purification filter refers to a device that purifies water by filtering and removing foreign substances floating in the water. One type of it is a water treatment filter that uses activated carbon as a filter ingredient.

In order to manufacture such activated carbon filters, activated carbon and binder have recently been extruded together. According to this, the activated carbon filter is formed by extruding a powdery resin binder and particulate activated carbon having a certain size with an extruder under certain temperature conditions or by heating and compressing it with a press.

Among these, an extrusion device disclosed in Patent Publication No. 10-2000-0068527 is a device for molding an activated carbon filter by extrusion. As shown in FIG. 1, when the mixed powder is input from the outside into the barrel 120 through the hopper 112, the device 110 rotates the screw 124 to insert the mixed powder into the die assembly 144. transferred to During transport, the mixed powder is heated by the heater 140 to form aggregates. The aggregate formed in this way is introduced into the die assembly 144 by the screw 124 and then cooled and solidified into the extrusion block 164. At this time, the agglomerate forms the inner diameter along the axis of the extrusion block 164 by the mandrel 136.

However, in the conventional activated carbon filter molding device 110, the mandrel 136 that creates the inner diameter along the axis of the aggregate forms one body with the screw 124, so the mixed powder is transferred from the upstream side of the device 110. Therefore, when rotating the screw 124, the mandrel 136 also rotates together with the screw 124, so that the inner diameter of the extrusion block 164 made by the mandrel 136 on the downstream side of the device 110 is rotated in the direction of rotation. There were problems that caused quality deterioration, such as deformation such as leaving marks or applying shear load due to friction.

Publication Patent No. 10-2000-0068527

The present invention was proposed to solve the problems of the conventional activated carbon filter manufacturing apparatus as described above. When extruding and molding a hollow cylindrical activated carbon filter, the axis of the cylinder is simultaneously formed during the extrusion process. In order to improve production efficiency by reducing the production process or equipment of the activated carbon filter by forming a hollow part along it, the transfer screw that mixes and transports the activated carbon powder and the core part that forms the hollow part in the mixture dough are formed as separate bodies, The purpose is to manufacture a high-quality activated carbon filter that does not undergo deformation or resistance due to the core of the hollow part that is simultaneously formed along the axis of the body when forming the cylindrical body of the activated carbon filter using a mold.

In order to achieve this purpose, the present invention includes a stirring unit that evenly mixes the powder components that make up the activated carbon filter, such as activated carbon and binder; It includes an extrusion part that transfers the activated carbon powder supplied from the stirring unit by a transfer screw and heats it by a heater to form a mixture dough, and a molding unit that forms a hollow cylindrical activated carbon filter with the mixture dough transferred from the extrusion unit. Provided is a cylindrical activated carbon filter manufacturing apparatus in which the molding unit is configured to mold the activated carbon filter in the form of a hollow cylinder with a hollow portion formed along the axis using the mixture dough transferred from the extrusion unit.

In addition, the molding unit includes a molding frame in which a cylindrical cavity is formed along the axis to mold the mixture dough press-injected from the extrusion unit into a cylindrical shape. a core portion disposed along the axis of the cavity to form the hollow portion along the axis while the mixture dough is molded into a cylinder shape by the cavity of the mold; and a core supporter disposed radially across the entrance of the cavity to support the core portion.

In addition, the molding frame includes a straight pipe portion that forms the first half of the cavity and into which the mixture dough is pressed through the entrance of the cavity; and a nozzle that is connected to the outlet of the straight pipe portion and forms the latter half of the cavity, and whose inner diameter is gradually tapered toward the outlet to compress the mixture dough pressed in from the straight pipe portion inward in the axial and radial directions to form an activated carbon filter. It is preferable that the straight pipe portion has an inner diameter larger than that of the nozzle portion and forms a compaction bump at a boundary with the nozzle portion on the inner circumferential surface of the cavity.

In addition, the compaction jaw is preferably formed to form a right angle to the inner peripheral surface of the straight pipe portion.

In addition, the compaction jaw is preferably formed to be inclined to form an obtuse angle with the inner peripheral surface of the straight pipe portion.

In addition, it is preferable that the compaction ledge has a curved inclined surface.

In addition, the core portion includes a fixed core extending along the axis in a fixed state connected to the center of the core support; and a rotating core extending along the axis, surrounding the fixed core and rotatably coupled to the fixed core.

In addition, the transfer screw preferably has an auxiliary blade formed at a point opposite to the end of the screw blade on the outer peripheral surface of the screw shaft and protruding in a spiral shape with a phase difference in the longitudinal direction from the screw blade.

In addition, the present invention includes a mixing step of mixing the component powder of the activated carbon filter introduced from the outside into activated carbon powder in a stirrer; An extrusion step of extruding the activated carbon powder mixed in the mixing step into a mixture dough by transferring it by a transfer screw while heating it with a heater in the extrusion unit; A molding step of continuously pressuring the mixture dough extruded in the extrusion step into a molding section by the transfer screw and forming a filter rod in the molding section; And a cutting step of cutting the filter rod molded in the molding step into an activated carbon filter, wherein in the molding step, the molding unit molds the mixture dough into a cylindrical shape through the cavity of the mold. A method of manufacturing a cylindrical activated carbon filter is provided, wherein a hollow part is formed along the axis of the mixture dough by a core part disposed along the axis of the cavity.

According to the cylindrical activated carbon filter manufacturing apparatus and manufacturing method of the present invention, when extruding a hollow cylindrical activated carbon filter, the cylindrical body of the activated carbon filter formed by a mold and the hollow part formed by the core along the axis of the body are simultaneously Since it can be molded, it is possible to increase production efficiency in manufacturing hollow cylindrical activated carbon filters.

In addition, when the cylindrical body of the activated carbon filter is formed from the mixture dough as above, the core part that simultaneously forms the hollow part along the axis of the mixture dough is separate from the transfer screw that transfers the mixture dough, so the core part rotates together with the transfer screw. When doing so, it is possible to prevent quality deterioration of the activated carbon filter caused by the deep part in advance.

In addition, since an auxiliary blade is formed at the end of the transfer screw that transfers the mixture dough, it is possible to increase the pressing force of the end of the transfer screw with respect to the mixture dough, so that the mixture dough discharged from the extrusion unit can be more smoothly fed into the molding unit. It is possible to further increase the density of the mixture dough introduced into the molding unit.

In addition, since a compaction ridge is formed at the boundary between the straight pipe portion and the nozzle portion of the mold, this compaction ridge creates resistance to the flow of the mixture dough exiting the straight pipe portion, thereby compacting the mixture dough more firmly, thereby making the mixture dough stronger. Furthermore, the density of the activated carbon filter can be increased.

In addition, the core can be made into a double structure with a fixed core and a rotating core surrounding the fixed core, and thus the rotating core can rotate relative to the fixed core, so that while the mixture dough passes through the mold 71. , Even if a spiral external force is applied to the core due to the lead angle twist of the feed screw, the rotation core can rotate together due to this external force, and thus the frictional resistance to the mixture dough in contact with the rotation core can be greatly reduced. Furthermore, it is possible to prevent quality deterioration of the activated carbon filter, such as scratches or damage, in advance.

Figure 1 is a schematic front view showing a conventional activated carbon filter manufacturing apparatus.
Figure 2 is a front view of a cylindrical activated carbon filter manufacturing apparatus according to an embodiment of the present invention.
Figure 3 is an enlarged view of the molding part shown in Figure 2.
Figure 4 is an exploded view of Figure 3.
Figure 5 is a right side view of Figure 3.
Figure 6 is a view showing another embodiment of the core shown in Figure 4.
Figure 7 is a view showing another embodiment of the transfer screw shown in Figure 2.
Figure 8 is a block diagram showing a method of manufacturing a cylindrical activated carbon filter according to an embodiment of the present invention.

Hereinafter, a cylindrical activated carbon filter manufacturing apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown by reference numeral 1 in FIG. 2, the cylindrical activated carbon filter manufacturing apparatus of the present invention largely includes a stirring unit (3), an extrusion unit (5), and a molding unit (7).

Here, the stirring unit (3) is a part that stirs the component powders such as various types of activated carbon and binder that make up the activated carbon filter (F) evenly, and is one end of the manufacturing device (1) to stir the component powders at the same time as they are introduced. is placed in

That is, the stirring unit 3 is designed to inject the ingredient powder into the stirring tank 31 through the hopper 32, as shown in FIG. 2, in order to stir activated carbon, etc. In addition, a transfer screw 33 is installed through the stirring tank 31 so as to extend long to the tip of the extrusion portion 5. Although the transfer screw 33 is not shown, it is driven to rotate by a drive motor connected through an electric means such as an electric chain.

At this time, the transfer screw 33 is a modified embodiment, and as shown in FIG. 7, an auxiliary blade 35 may be provided at the end of the outer peripheral surface of the screw shaft 37. This auxiliary blade 35 is a short screw blade that starts at a point opposite to the point on the outer peripheral surface of the screw shaft 37 where the end of the screw blade 34 is located, that is, at a point opposite to the end of the screw blade 34. It is formed to protrude in a spiral shape to have a phase difference of, for example, 0.5 pitch in the longitudinal direction with the blade 34. Therefore, the auxiliary blade 35 presses the mixture dough that is pressed into the cavity C through the core support 75 described later at the entrance of the mold 71 more strongly and uniformly than when the auxiliary blade 35 is not present. . At this time, the phase difference between the screw blade 34 and the auxiliary blade 35 is preferably 0.5 pitch.

The extrusion unit 5 is a part that presses the ingredient powder mixed in the above stirring unit 3 at a high temperature to form a paste mixture and transfers it to the molding unit 7. As shown in FIG. 2, It consists of one or more pipe bodies (51) extending long from the stirring part (3) to the forming part (7). In addition, the extrusion unit 5 has a transfer screw 33 connected from the stirring unit 3 inside the tube body 51 extending just before the forming unit 7, and the mixed ingredient powder supplied from the stirring unit 3 The mixture dough is created and pushed out by transferring it while pressurizing it to the molding part (7). At this time, a heater 53 is installed on the outside of the tube body 51 to heat the component powder being pressure-fed along the through hole inside the tube body 51, so that the binder among the component powders is melted during the pressure-feed process, turning the component powder into a mixture dough. .

The molding unit 7 is a part that molds the activated carbon filter (F) with the mixture dough supplied from the extrusion unit 5, and is installed at the end of the extrusion unit 5, as shown in FIG. 2. Accordingly, the molding unit 7 creates a hollow cylindrical activated carbon filter (F) by pushing the mixture dough pressurized and transferred from the extrusion unit 5 in the axial direction and simultaneously compressing and squeezing it in the radial direction. However, the filter rod (R) extruded long from the molding unit (7) is cut to an appropriate length and completed as an activated carbon filter (F).

In particular, the molding unit 7 compresses the mixture dough squeezed out of the extrusion unit 5 in the axial and radial directions as above and molds it into a cylindrical shape, and at the same time forms a cylindrical shape along the axis through the core portion 73, which will be described later. Forms a hollow portion (H). For this purpose, the molding part 7 is composed of a molding frame 71, a core portion 73, and a core support 75, as shown in FIGS. 2 to 4.

Here, the mold 71 is the main body of the molding section 7, and molds the mixture dough pressed in and pushed out from the extrusion section 5 into a hollow cylindrical filter rod (R) with the same cross section. To form a cavity (C) along the axis. Moreover, the forming mold 71 can be manufactured in any shape as long as the mixture dough can be squeezed through the filter rod (R), and can be manufactured as a single tube body as a whole or as a tube body divided into several stages. That is, as in this embodiment, the mold 71 may be manufactured divided into a straight pipe portion 81 and a nozzle portion 83, as shown in FIGS. 2 to 4.

Here, the straight pipe portion 81 is a hollow cylindrical body that forms the front end of the forming frame 71, that is, the front half of the cavity C. As shown in FIGS. 2 to 4, the inner diameter of the cavity C is oriented in the axial direction. Since it is maintained constant at the outlet of the extrusion unit 5, the mixture dough is pressed in from the extrusion unit 5 through the entrance of the cavity C.

In addition, the nozzle portion 83 is a hollow cylindrical body that forms the rear end of the mold 71, that is, the latter half of the cavity C. However, as shown in FIGS. 2 to 4, the inner diameter of the cavity C has an outlet. Since it gradually tapers toward the outlet of the straight pipe portion 81, the mixture dough pressed in from the straight pipe portion 81 is compressed not only in the axial direction but also in the radial direction, thereby forming the filter rod (R), that is, the activated carbon filter. Make sure it is molded as (F).

At this time, as shown enlarged in FIG. 3, the inner diameter D1 of the straight pipe portion 81 may be larger than the inner diameter D2 of the inlet of the nozzle portion 83. As a result, a compaction ridge 76 is formed at the boundary between the straight pipe portion 81 and the nozzle portion 83 on the inner peripheral surface of the cavity C. Therefore, the compaction jaw 76 serves to compact the mixture dough passing through the straight pipe portion 81 by receiving resistance to the flow before it is injected into the nozzle portion 83. Accordingly, the mixture dough that is pressed into the straight pipe portion 81 and approaches the compaction jaw 76 is temporarily stored and compacted, thereby reducing internal bubbles and consequently increasing its own density.

At this time, the compaction jaw 76 may be formed to protrude in the normal direction from the inner peripheral surface 82 of the straight pipe portion 81 and form a right angle to the inner peripheral surface 82, as shown enlarged at (A) in FIG. 3. In this case, It provides relatively the greatest resistance to the flow of the mixture dough. In addition, as shown in (B) in FIG. 3, the compaction jaw 76 may be formed inclined to form an obtuse angle with the inner peripheral surface of the straight pipe portion 81. In this case, the resistance to the flow of the mixture dough is relatively small. Lose. In addition, as shown in (C) in FIG. 3, the inclined surface of the compaction ledge 76 may be curved. In this case, it is smaller than the right-angled compaction ledge 76 shown in (A), but is shown in (B). It brings greater resistance to the mixture dough than the obtuse-angled compaction ledge 76, and at the same time, returns the mixture dough caught on the compaction ledge 76, that is, allows compaction to occur more gently.

The core portion 73 is a means for forming a hollow portion (H) along the axis in the mixture dough, and as shown in Figures 2 and 4, it is long along the axis of the cavity (C) formed in the mold 71. It consists of a cylindrical bar that is placed. Accordingly, the core portion 73 forms a hollow portion (H) along the axis of the mixture dough while the mixture dough passes through the cavity (C) of the mold 71 and is molded into a cylindrical shape.

Accordingly, the core portion 73 does not form a hollow portion (H) after the mixture dough is completely molded into a cylindrical body by the cavity (C), but forms a hollow portion (H) while being molded into a cylindrical body within the cavity (C). make it possible

The core support 75 is a means for supporting the core portion 73 within the cavity C. As shown in FIGS. 2 and 4 to 6, the core support 75 is located on the inner peripheral surface of the mold 71 at the entrance to the cavity C. It extends radially across the inlet to support the core portion 73. For this purpose, the core support 75 is integrally formed by the ring-shaped core head 77, and the core head 77 is coaxially mounted at the entrance of the straight pipe portion 81 of the mold 71. In addition, it is desirable to have three core supports 75 so that they form an angle of 120 degrees, but they can be arbitrarily increased or decreased.

At the same time, since the core support 75 is located on the inlet side of the straight pipe portion 81, the mixture dough pressurized from the extrusion portion 5 is pressed by the transfer screw 33 before being introduced into the mold 71. , It serves to unwind the lead angle twist of the mixture dough that was inclined due to the lead angle of the screw blade (34) during the transfer process.

Meanwhile, as another embodiment, the core portion 73 can be made into a double pipe structure so that the outer surface can be rotated relative to the axis, as shown in FIG. 6. That is, the core portion 73 can be in the form of a double pipe by the fixed core 85 and the rotating core 87. For this purpose, the fixed core 85 is a rod body connected to and fixed to the center of the core support 75, and extends long along the axis to be supported by inserting the rotating core 87 on the outer surface. Additionally, the rotating core 87 extends long along the axis so as to be fitted around the fixed core 85 to enable relative rotation. At this time, the rotation core 87 is prevented from moving in the axial direction by the ring-shaped protrusion and groove pair 91. Therefore, while the mixture dough passes through the forming mold 71, the rotating core 87 rotates in the direction of the twist even if an external force is applied due to the twisting of the lead angle as described above, thereby leaving marks due to the reaction against the mixture dough in contact. will not leave behind.

Now, a method for manufacturing a cylindrical activated carbon filter according to a preferred embodiment of the present invention will be described.

As shown in Figure 8, the activated carbon filter manufacturing method of the present invention largely consists of a mixing step (S10), an extrusion step (S20), a molding step (S30), and a cutting step (S40).

Here, the mixing step (S10) is a step of mixing the component powder of the activated carbon filter introduced from the outside. As shown in FIG. 2, the activated carbon powder introduced from the outside into the stirring unit 3 through the hopper 32 is mixed. Mix by the transfer screw (33).

The extrusion step (S20) is a step of making the mixed activated carbon powder into a mixture dough and transferring it to the molding step. The activated carbon powder mixed in the mixing step (S10) is passed through the extrusion unit (5) by the transfer screw (33). By heating with the heater (53) while doing so, the binder in the activated carbon powder is melted to make the mixture dough, and at the same time, the mixture dough is slowly pushed out toward the mold (71).

The forming step (S30) is a step of making a semi-finished product of the filter rod (R), that is, the activated carbon filter (F), which is extruded in the extrusion step (S20) into the mold 71 of the molding unit 7, that is, into the cavity ( The filter rod (R) is formed by mixing the mixture pressed into C). For this purpose, the mixture dough pressurized from the extrusion part 5 through the core support 75 into the cavity C of the mold 71 passes through the straight pipe part 81 and is molded into a cylindrical outer shape while simultaneously forming the core part. A hollow portion H is formed along the axis by (73). In this way, the mixture dough, which is pressure-fed while forming a hollow cylindrical body, reaches the entrance of the nozzle unit 83, gets caught on the compaction jaw 76, and is pressed in the reverse direction to be firmly compacted. In other words, the mixture dough caught on the compaction jaw 76 is temporarily stored, and by pressing in both directions, air bubbles are reduced, and the density is increased by being tightly compacted.

Afterwards, the mixture dough pressed into the nozzle portion 83 while compacted is further compressed not only in the axial direction but also in the radial direction by the inner peripheral surface of the nozzle portion 83, which is tapered to gradually become narrower toward the outlet, as shown in the left end of FIG. 2. It is squeezed out of the mold 71 in the form of a long filter rod (R) through the outlet of the cavity (C).

The cutting step (S40) is a step of cutting the filter rod (R) into one completed activated carbon filter (F), and the filter rod (R), which has been molded into a cylindrical shape in the above forming step (S30), can be formed into various shapes. Cut it with a cutter to make the finished activated carbon filter (F).

Although the specific implementation of the present invention has been described above as an example, these are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. It will be apparent to those skilled in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention.

1: Cylindrical activated carbon filter manufacturing device
3: stirring part 5: extrusion part
7: forming part 31: stirring container
33: transfer screw 35: auxiliary blade
34: Screw blade 51: Pipe body
53: Heater 71: Molding frame
73: core 75: core support
76: compaction jaw 81: straight section
83: nozzle part 85: fixed core
87: Rotating center C: Joint
F: Filter H: Hollow section
R: Filter rod

Claims (9)

A stirring unit (3) that evenly mixes the powder components that make up the activated carbon filter (F), such as activated carbon and binder;
an extrusion unit (5) that transfers the activated carbon powder supplied from the stirring unit (3) by a transfer screw (33) and heats it by a heater (53) to form a mixture dough; and
It includes a molding unit (7) for molding a hollow cylindrical activated carbon filter (F) with the mixture dough transferred from the extrusion unit (5),
The molding unit (7) is cylindrical, characterized in that it is configured to mold the activated carbon filter (F) in the form of a hollow cylinder with a hollow part (H) formed along the axis using the mixture dough transferred from the extrusion unit (5). Activated carbon filter manufacturing device. In claim 1,
The molded part 7 is,
a molding frame (71) in which a cylindrical cavity (C) is formed along the axis to mold the mixture dough pressurized from the extrusion unit (5) into a cylindrical shape;
A core portion 73 disposed along the axis of the cavity C to form the hollow portion H along the axis while the mixture dough is molded into a cylindrical shape by the cavity C of the mold 71. ; and
A cylindrical activated carbon filter manufacturing apparatus comprising: a core support (75) disposed radially across the entrance of the cavity (C) to support the core portion (73). In claim 2,
The molding frame 71 is,
A straight pipe portion (81) forming the first half of the cavity (C) and into which the mixture dough is pressed through the entrance of the cavity (C); and
It connects to the outlet of the straight pipe portion 81 to form the latter half of the cavity (C), and compresses the mixture dough press-in from the straight pipe portion 81 inward in the axial and radial directions to form an activated carbon filter (F). It includes a nozzle portion (83) whose inner diameter is gradually tapered to become smaller toward the outlet,
The inner diameter of the straight pipe portion 81 is larger than that of the nozzle portion 83, and a compaction ridge 76 is formed at the boundary with the nozzle portion 83 on the inner peripheral surface of the cavity C. A cylindrical activated carbon filter manufacturing device. In claim 3,
A cylindrical activated carbon filter manufacturing device, characterized in that the compaction jaw (76) is formed to form a right angle to the inner peripheral surface of the straight pipe portion (81). In claim 3,
A cylindrical activated carbon filter manufacturing device, characterized in that the compaction jaw (76) is formed inclined to form an obtuse angle with the inner peripheral surface of the straight pipe portion (81). In claim 5,
A cylindrical activated carbon filter manufacturing device, characterized in that the compaction jaw (76) has a curved inclined surface. In claim 2,
The core portion 73 is,
A fixed core (85) connected to the center of the core support (75) and extending along the axis in a fixed state; and
A cylindrical activated carbon filter manufacturing apparatus comprising a rotating core (87) surrounding the fixed core (85) and extending along the axis in a state rotatably coupled to the fixed core (85). In claim 1,
The transfer screw 33 has an auxiliary blade 35 formed at a point opposite to the end of the screw blade 34 on the outer peripheral surface of the screw shaft 37 and protruding in a spiral shape with a phase difference in the longitudinal direction with the screw blade 34. A cylindrical activated carbon filter manufacturing device comprising: A mixing step (S10) of mixing the component powder of the activated carbon filter introduced from the outside into activated carbon powder in the stirring unit (3);
An extrusion step (S20) of extruding the activated carbon powder mixed in the mixing step (S10) into a mixture dough by transferring it by a transfer screw (33) while heating it with a heater (53) in the extruder (5);
A molding step (S30) in which the mixture dough extruded in the extrusion step (S20) is continuously pressed into the molding section (7) by the transfer screw (33) and molded into a filter rod (R) in the molding section (7). ; and
A cutting step (S40) of cutting the filter rod (R) molded in the forming step (S30) into an activated carbon filter (F),
In the forming step (S30), the forming part 7 is a core portion disposed along the axis of the cavity C while the mixture dough is formed into a cylindrical shape by the cavity C of the forming mold 71. 73) A method of manufacturing a cylindrical activated carbon filter, characterized in that a hollow portion (H) is formed along the axis in the mixture dough.

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