JP2002336617A - Manufacturing method and manufacturing apparatus for filter medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing apparatus for filter media which is capable of improving filtration performance by shaping the outer form of the filter media to a nearly spherical shape. SOLUTION: This manufacturing apparatus for filter media has finish machining equipment 4 which finishes the filter media 1 of the unshaped external form fabricated to the form aggregated with thin belt-like machined pieces like pleats by machining resin members to the external form of the nearly spherical shape. The finish machining equipment 4 includes grasping members 5 and 6 between which the filter media 1 of the unshaped external form are supplied and a driver 7 which relatively displaces and drives the grasping members 5 and 6. A passage 10 in which the filter media 1 grasped between the grasping members 5 and 6 moves from an introducing port 8 to a discharge port 9 while rotationally sliding by accompanying the relative displacement and drive of the grasping members 5 and 6 is disposed between the grasping members 5 and 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a plastic filter material obtained by cutting a resin member.

[0002]

2. Description of the Related Art Conventionally, sand filter media has been generally used as a filter material for water treatment equipment such as a bacterial culture filter. However, this sand filter material does not sufficiently capture suspended solids and is difficult to backwash. There are problems such as small porosity, large pressure loss, heavy weight, and difficulty in handling.

[0003] On the other hand, a plastic filter medium which solves such a problem of the sand filter medium is provided by Japanese Patent Application Laid-Open No. Hei 7-323294, and has been applied for patent application as Japanese Patent Application No. 2000-348761 by the present applicant. Something was done. FIG. 5 (a) shows an example of such a plastic filter medium 1, which is made of a thin plastic cutting piece 2 obtained by cutting a resin member. 2 are formed by crimping and gathering together.

[0004] This plastic filter medium 1 has a large number of pockets formed in a fold-shaped cutting piece 2 to increase the trapping efficiency of suspended solids and enable cultivation of a large amount of bacteria. In addition, since it is lightweight, it has many advantages, such as easy backwashing and handling, and because it can be formed with a large volume, the porosity can be increased to reduce pressure loss.

[0005]

However, the above-mentioned filter medium 1 is formed by aggregating the cutting pieces 2 when cutting the resin member.
Has an irregular shape such as a deformed ellipsoid. For this reason, when filling and using a large number of filter media 1 in a water treatment machine, it is not possible to increase the packing density, the gap between the filter media 1 becomes too large, and the filtration performance may be reduced. There was a problem.

[0006] The present invention has been made in view of the above points, and an object of the present invention is to provide a method and an apparatus for manufacturing a filter medium capable of improving the filtration performance by shaping the outer shape of the filter medium into a substantially spherical shape. It is the purpose.

[0007]

According to a first aspect of the present invention, a filter member manufacturing apparatus according to the first aspect of the present invention is manufactured by cutting a resin member 3 so that thin strip-shaped cut pieces 2 are gathered in a pleated shape. An apparatus for manufacturing a filter medium having a finishing device 4 for finishing an irregularly shaped filter medium 1 into a substantially spherical outer shape. The finishing apparatus 4 includes a filter medium 1 having an irregular outer shape. A plurality of holding members 5 and 6 supplied therebetween and a driving device 7 for relatively displacing and driving the holding members 5 and 6 are formed, and the holding members 5 and 6 are provided between the holding members 5 and 6. A passage 10 is provided in which the filter medium 1 sandwiched between the sandwiching members 5 and 6 moves from the inlet 8 to the outlet 9 while rotating and sliding with the relative displacement driving of the holding members 5 and 6. It is a feature.

According to a second aspect of the present invention, in the first aspect, the inner diameter of the passage 10 is gradually reduced from the inlet 8 to the outlet 9. It is.

According to a third aspect of the present invention, in the first or second aspect, the driving device 7 rotationally drives at least one of the plurality of holding members 5 and 6. .

According to a fourth aspect of the present invention, in the third aspect, the passage 10 is formed in a spiral shape with one end serving as the inlet 8 and the other end serving as the outlet 9. .

According to a fifth aspect of the present invention, in the fourth aspect, the introduction port 8 is provided on the outer peripheral end side of the holding members 5 and 6, and the discharge port 9 is provided on the rotation center side of the holding members 5 and 6, respectively. It is characterized by having.

The invention of claim 6 is characterized in that, in any one of claims 1 to 5, the passage 10 is provided with an elastic member 11 for preventing the filter medium 1 from slipping.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the passage 10 is provided with a convex portion 12 or a concave portion for preventing the filter medium 1 from slipping. is there.

An eighth aspect of the present invention is characterized in that, in any one of the first to seventh aspects, the cross-sectional shape of the passage 10 is at least partially arc-shaped.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, an air blow device 13 for blowing air to the filter medium 1 discharged from the discharge port 9 is provided. is there.

According to a tenth aspect of the present invention, there is provided a filtration material having an irregular outer shape manufactured by cutting a resin member 3 so that thin strip-shaped cut pieces 2 are gathered in a pleated shape. The material 1 is supplied between the plurality of holding members 5 and 6, and the holding members 5 and 6 are relatively displaced and driven to rotate and slide the filter medium 1 held between the holding members 5 and 6. It is characterized by including a finishing step of finishing the filter medium 1 into a substantially spherical outer shape by moving the passage 10 between the holding members 5 and 6 from the inlet 8 to the outlet 9.

In the method for manufacturing a filter medium according to claim 11 of the present invention, a forming step of forming the resin member 3 by forming the resin molding material 15, and a thin cutting by cutting the formed resin member 3. A cutting step of manufacturing the filter medium 1 having an irregular outer shape in a form in which the pieces 2 are gathered in a fold shape, and supplying the manufactured filter medium 1 between the plurality of holding members 5, 6. Are relatively displaced and driven to rotate the filter medium 1 held between the holding members 5 and 6 while rotating the filter medium 1 therebetween.
And a finishing step of finishing the filtering medium 1 into a substantially spherical outer shape by moving the passage 10 between the openings 6 from the inlet 8 to the outlet 9.

According to a twelfth aspect of the present invention, in the eleventh aspect, the resin member 3 molded in the molding step is replaced with the resin member 3.
Before the temperature falls below the softening temperature of the resin, the filtering material 1 is manufactured by cutting in a cutting step.

According to a thirteenth aspect of the present invention, in the molding step of the eleventh or twelfth aspect, the resin molding material 15 is extruded to form the resin member 3 in a rod shape, and the extruded resin member 3 is continuously formed. In a cutting process for cutting.

According to a fourteenth aspect of the present invention, in the cutting step of any one of the eleventh to thirteenth aspects, the filtering member 1 is manufactured by cutting the resin member 3 while heating the cutting blade 14. It is a feature.

According to a fifteenth aspect of the present invention, in the method according to any one of the eleventh to fourteenth aspects, the filter medium 1 produced in the cutting step is cooled to a temperature higher by 0 to 20 ° C. than the softening temperature of the resin of the resin member 3. In the finishing step, the outer shape of the filter medium 1 is finished to a substantially spherical shape.

[0022]

Embodiments of the present invention will be described below.

FIG. 3 shows the whole process of manufacturing the filter medium 1. First, in the forming process, FIGS.
As shown in (1), a cylindrical rod-shaped resin member 3 is molded from the resin molding material 15. The molding process comprises an extrusion molding machine 20 and a molding die 21, as shown in FIG.
2, a resin molding material 15 of a thermoplastic plastic such as PVC, ABS, PP, PE, PS, etc. is put into an extruder 20, and the resin molding material 15 is melted to form a molding die 2.
By extruding from 1, the rod-shaped resin member 3 can be formed. After the resin member 3 thus extruded is cooled by the cooling device 28, the extruder 20 is cooled.
It is sent to the cutting process along with extrusion from.

The cutting step is formed by including the cutting device 23. As shown in FIGS. 3B to 3C, the rod-shaped resin member 3 is cut to produce the filter medium 1. The cutting device 23 includes a rotor 25 driven to rotate by a motor 24.
It is formed by attaching the cutting blade 14 to the cutting tool. The resin member 3 extruded into a rod shape is a feed roller 2
At 6, the cutting blade 14 is fed toward the tip of the cutting blade 14 through the guide cylinder 27. The feed roller 26 is a resin member 3
After a predetermined pitch dimension is sent in the longitudinal direction, the feeding is stopped for a predetermined time, and then the resin member 3 is fed in a longitudinal direction by a predetermined pitch dimension in such a manner that pitch feeding is repeated.

As described above, the cutting member 14 which rotates the tip end surface of the resin member 3 by feeding the round bar-shaped resin member 3 in the longitudinal direction is used.
By performing the cutting, the filter medium 1 can be manufactured. At this time, the cutting edge 14a of the cutting blade 14
4, one end of the cutting edge 14a is pointed in a L-shape. As shown in FIG. 4, the cutting blade 14 is brought into contact with the center of the distal end face of the resin member 3 while the cutting edge 14a is in contact with the pointed edge of the cutting edge 14a. When the tip end surface of the resin member 3 is cut by a cutting edge 14a of the cutting blade 14 in a half range from the center, a thin strip-shaped cutting piece 2 is formed.
Are cut into a fan shape, and the cut pieces 2 are gathered while forming folds to form the filter medium 1 from the difference in the perimeter between the one side edge 2a and the other side edge 2b of the cut piece 2. Things. This filter medium 1a has an outer shape close to a spherical shape.
As shown in (a), it is formed in an irregular outer shape such as an ellipse.

Here, the resin member 3 extruded and formed in the forming step is sent to the cutting step as it is extruded, without being cut to a fixed size, in a state where the resin member 3 is extruded. It is made to be processed. Therefore,
The work and place for storing and transporting the molded resin member 3 become unnecessary, and the production efficiency can be improved.

The resin member 3 extruded in the molding step is sent to a cutting step before the temperature falls below the softening temperature of the resin due to the outside air temperature, and is processed into the filter medium 1a. is there. By performing the cutting of the resin member 3 at a temperature equal to or higher than the softening temperature of the resin in this manner, it is possible to perform a cutting process with good cutability, and to reheat the resin member 3 in order to improve the cutability. It becomes unnecessary.

Further, in cutting the resin member 3 with the cutting blade 14 in the cutting step, the blade surface of the cutting blade 14 is blown to the cutting edge of the resin member 3 by, for example, blowing hot air on the cutting blade 14 with a hot air heater 29. It is preferable to perform cutting while heating to a constant temperature equal to or higher than the resin softening temperature. While heating the cutting blade 14, the resin member 3
By performing this cutting, the life of the blade can be extremely extended. For example, when the resin member 3 is made of polyvinyl chloride, the softening temperature is 63 ° C.
Was heated to 70 ° C., and the life was evaluated. As a result, the life of the blade was extended about 10 times.

As described above, the filter material 1a manufactured in the cutting process has an irregular outer shape as described above.
In the finishing step, the outer shape of the filter medium 1a is finish-processed to produce a filter medium 1b whose outer shape is almost spherical as shown in FIGS. 3 (c) to 3 (d). The finishing step includes a finishing apparatus 4 as shown in FIG. 1, and the finishing apparatus 4 includes a pair of holding members 5, 6 arranged opposite to each other.
And a driving device 7 that rotationally drives one of the holding members 6.

Each of the pair of holding members 5 and 6 is formed in a disk shape, and the holding member 5 is fixed to the base 30 in an upright state. A concave groove 10 a is formed in a surface of the holding member 5 facing the holding member 6. FIG. 6 shows an example of the holding member 5, in which the concave groove 10 a is formed as a spiral groove, and one end of the concave groove 10 a is an outer peripheral end of the holding member 5 and is directed outward as an inlet 8. At the same time, the other end of the concave groove 10a is
It is formed as a discharge port 9 which is opened on the surface on the opposite side to the above.
On the outer surface of the holding member 6, a discharge tube 31 communicating with the discharge port 9 is provided so as to protrude. FIG. 7A shows the inner circumference of the concave groove 10a.
As shown in (b), a convex portion 12 (or concave portion) is provided. The convex portions 12 (or concave portions) are provided so as to cross the inner circumference of the concave groove 10a, and are provided in large numbers along the longitudinal direction of the concave groove 10a at a pitch interval larger than the outer diameter of the filter medium 1a.

The center of the back surface of the holding member 6 is fixed to a rotating shaft 33 driven by a motor 32 or the like of the driving device 7, and the holding member 5 is fixed to the holding member 5 so that the center of rotation coincides with the discharge port 9. They are arranged facing each other in parallel with a gap. By arranging the sandwiching members 5 and 6 in such a manner, the passage 10 through which the filtering material 1a passes between the sandwiching members 5 and 6 is formed by the concave groove 10a. The direction of rotation of the holding member 6 is set to match the direction of rotation of the spiral of the passage 10 from the inlet 8 to the outlet 9. As shown in FIG. 7, an anti-slip elastic member 11 having a flat surface formed of a rubber sheet or the like is stretched over substantially the entire surface of the holding member 6 facing the holding member 5.

Further, the holding member 5 is arranged so that the introduction port 8 is located at the upper end, and the hopper is located above the holding members 5 and 6 so that the opening at the lower end faces the introduction port 8. 34 are arranged.

The filter material 1a produced in the cutting step is supplied to the hopper 34, and the filter material 1a is sequentially supplied between the holding members 5 and 6 through the opening at the lower end of the hopper 34. . The filter medium 1a supplied between the holding members 5 and 6 enters the passage 10 from the introduction port 8. However, the rotation of the holding member 6 and the relative movement of the holding member 5 causes the filter medium 1a to be driven. Is slidably rotated between the holding members 5 and 6, and the spiral passage 1 is rotated with the rotation of the holding member 6.
0 is rolled and moved from the inlet 8 to the outlet 9.
By rotating and sliding the filter medium 1a between the holding members 5 and 6 in this manner, the irregular shape of the filter medium 1a can be worn and shaped into a spherical shape, as shown in FIG. 5 (b). As a result, it is possible to obtain a filter medium 1b having a substantially spherical shape. At this time, if the temperature of the filter medium 1a is higher than the softening temperature of the resin by 20 ° C. or more, it is too soft to form into a spherical shape. It is desirable to supply it to No. 4 for finishing. The temperature of the filter medium 1a is preferably set to be 0 to 20C, more preferably 5 to 15C higher than the softening temperature of the resin.

Here, the concave groove 10a forming the passage 10 is formed in a concave arc shape such as a semicircular cross section, and the inner diameter (width) of the groove 10a is changed from the inlet 8 side to the outlet 9 side. It is formed so that it gradually becomes smaller. That is, in FIG. 6, t1>t2>t3> t4, and t4 is set so as to be equal to the target diameter of the finished filter medium 1b. Therefore, the inlet 8
The filter medium 1a introduced into the passage 10 from the
When the passage 10 moves along with the rotation of the holding member 6 while being rotated and slid between the six members, the diameter is gradually reduced, and the shape is changed from an irregular outer shape to a spherical outer shape. It is possible to finish almost spherically without variation. For example, t1 = 24 mm and t4 = 15 mm in order to finish the elliptical filter medium 1 a having an outer shape of 20 mm × 22 mm into a spherical filter medium 1 b having a diameter of 15 mm.
It is good to set to. The filter medium 1b finished by the finishing device 4 in this way is discharged from the finishing device 4 to the receiving container 35 through the discharge port 31 through the discharge tube 31. If the temperature of the filter medium 1b rises to a temperature higher than the softening temperature of the resin by 20 ° C. or more when rotating and sliding between the holding members 5 and 6, the filter medium 1b may be deformed. An air blow device 13 is provided at 31, and cool air is blown to the filter medium 1 b passing through the discharge tube 31 to cool the filter medium 1 b.

The groove 10a forming the passage 10 is shown in FIG.
As shown in FIG. 5, the holding member 5 may be formed linearly. However, in this case, the holding members 5 and 6 need to be formed large, so that the passage 10 is formed in a spiral shape as described above. Preferably, a long passage 10 is formed between the small holding members 5 and 6. Further, by forming the passage 10 in a spiral shape and rotating the holding member 6 in this manner, the filter medium 1 is rotated with the rotation of the holding member 6.
a can be quickly moved along the passage 10 to perform finishing processing. For example, high-speed processing can be performed by introducing the filtering material 1a into the passage 10 at high speed from the inlet 8 at intervals of about 0.5 seconds. It becomes something.

The passage 10 has a spiral shape in which an introduction port 8 is provided at the outer peripheral end of the holding member 5 and a discharge port 9 is provided at the center of the holding member 5. Since the outer periphery is larger and the center is smaller, and the holding member 6 rotates at a constant rotation speed, the filter medium 1a
Moves while slowly rotating and sliding in the passage 10 in the outer peripheral portion, and moves while rotating and sliding faster in the central portion. For this reason, when the outer shape of the filter medium 1a is irregular and distorted, the outer peripheral portion is slowly rotated and slid and shaped, and when the outer shape is adjusted, the inner circumferential portion is quickly rotated and slid and shaped. The processing can be performed stably without taking extra time.

When the filter medium 1a is slid between the holding members 5 and 6 as described above, if there is a slip between the filter medium 1a and the holding members 5 and 6, the filter medium 1a is stabilized. In addition to the difficulty in shaping the filter material into a spherical shape, the time required for the filter medium 1a to move through the passage 10 is increased, and the time required for finishing is increased. For this purpose, the holding member 6 is provided with the elastic member 11 facing the passage 10 as described above.
The filter medium 1a is elastically sandwiched between the holding members 5 and 6 via the to prevent slippage. Further, as described above, the convex portion 12 (or concave portion) is provided in the concave groove 10a constituting the passage 10, and even if the filtering material 1a slips, the filtering material 1a is forcibly rotated by the convex portion 12, and the filtering material 1a is rotated. 1a is forcibly rotated and slid so that it can be shaped into a sphere.

The filtering material 1b obtained by finishing in the finishing step as described above has a substantially spherical outer shape, and is filled with a large number of the filtering materials 1b at a high packing density to form a gap between the filtering materials 1b. It can be used in a reduced state, and has a smaller outer diameter and a smaller inner space of the filter medium 1b, so that the surface area of the filter medium per unit volume can be increased to improve the filtration performance. is there. In a circulating filtration device such as a commercial bath, a suspended substance in water is removed by a filtering material 1b.
The filter medium 1b of the present invention, which has a large surface area per unit volume and a large pocket area, is particularly excellent in the purification ability by such filtration since water is precipitated by being precipitated in the pocket inside and fixed in the pocket. Is what it is.

[0039]

As described above, the filter material manufacturing apparatus according to the first aspect of the present invention is an irregular-shaped filter member manufactured by cutting a resin member into thin strip-shaped cut pieces gathered in a pleated shape. An apparatus for manufacturing a filter medium having a finishing device for finishing a filter medium having a substantially external shape into a substantially spherical outer shape, wherein the finishing apparatus includes a plurality of filter media having an irregular outer shape supplied therebetween. And a driving device for relatively driving the holding member to be displaced. Between the holding members, the holding member is held between the holding members with the relative driving of the holding member. A passage is provided to move the filter media from the inlet to the discharge port while rotating and sliding, so that when the filter media is slid between the holding members, the irregular outer shape of the filter material is worn out. , Which can shape the filter media into a nearly spherical shape There are those capable of improving the filtration performance of the filter media.

According to a second aspect of the present invention, since the passage is formed so that the inner diameter thereof gradually decreases from the inlet to the outlet, the diameter of the filter medium during passage through the passage is reduced. Is gradually reduced, the filter medium can be shaped into an outer diameter corresponding to the inner diameter of the passage at the outlet, and the filter medium can be finished in a state where the sphere diameters are aligned.

According to a third aspect of the present invention, in the driving device, at least one of the plurality of holding members is rotationally driven. Therefore, by rotating the holding members, the filter medium is moved between the holding members. It can be shaped into a sphere by rotating and sliding.

According to a fourth aspect of the present invention, since the passage is formed in a spiral shape having one end serving as an inlet and the other end serving as a discharge, the length of the passage does not need to be increased. The length can be formed long, and the finishing apparatus can be made compact.

According to the fifth aspect of the present invention, the inlet is provided on the outer peripheral end of the holding member, and the discharge port is provided on the rotation center side of the holding member. At the same time, the finished filter material can be discharged from the center of the holding member.

According to the sixth aspect of the present invention, since the elastic member for preventing the filter medium from slipping is provided in the passage, it is possible to prevent the slipping between the filter medium and the sandwiching member. It is possible to stably shape the filter material into a spherical shape.

According to the seventh aspect of the present invention, since the convex portion or the concave portion for preventing the filter medium from slipping is provided in the passage, the filter medium can be forcibly rotated by the convex portion or the concave portion. In addition, the filter material can be stably formed into a spherical shape.

According to the eighth aspect of the present invention, since the cross-sectional shape of the passage is formed so that at least a part thereof has an arc shape, the outer periphery of the filter medium is worn by this cross-sectional shape of the passage,
It is possible to stably shape the filter material into a spherical shape.

In the ninth aspect of the present invention, since an air blowing device for blowing air to the filter medium discharged from the outlet is provided, the filter medium can be cooled, and the spherically shaped filter medium is deformed. That can be prevented.

According to a tenth aspect of the present invention, there is provided a method of manufacturing a filter medium having an irregular outer shape manufactured by cutting thin resin strips into a fold shape by cutting a resin member. Is supplied between the plurality of holding members, the holding member is relatively displaced and driven, and the passage between the holding members is moved from the introduction port to the discharge port while rotating and sliding the filter medium held between the holding members. By having a finishing process that finishes the filter media into a nearly spherical outer shape,
When the filter medium is rotated and slid between the holding members, the irregular outer shape of the filter medium is worn to form the filter medium into a substantially spherical shape, thereby improving the filtration performance of the filter medium. Is what you can do.

[0049] In the method for manufacturing a filter medium according to the eleventh aspect of the present invention, there is provided a molding step of molding a resin molding material to form a resin member, and forming a thin cut piece by cutting the molded resin member. A cutting step of manufacturing a filter medium having an irregular outer shape in a form gathered in a shape, supplying the manufactured filter medium between a plurality of holding members, and driving the holding members relatively to move between the holding members; A finishing process of finishing the filter medium into a substantially spherical outer shape by moving the passage between the holding members from the introduction port to the discharge port while rotating and sliding the filter medium held by the filter medium. When rotating the sliding member between the holding members, the irregular shape of the filter material can be worn out, and the filter material can be formed into a substantially spherical shape, thereby improving the filtration performance of the filter material. You can do it.

According to a twelfth aspect of the present invention, the resin member molded in the molding step is cut in the cutting step before the temperature of the resin member falls below the softening temperature of the resin to produce a filter medium. Therefore, the cutting property of the resin member is improved, and the filtration member can be manufactured efficiently.

According to a thirteenth aspect of the present invention, in the molding step, the resin molding material is extruded to form a resin member into a rod shape, and the extruded resin member is continuously sent to the cutting step for cutting. As a result, it is not necessary to store the molded resin member, and the production efficiency can be improved.

According to a fourteenth aspect of the present invention, in the cutting step, the filtering material is manufactured by cutting the resin member while heating the cutting blade, so that the cutting performance of the resin member is improved. Can extend the life of the device.

In the fifteenth aspect of the present invention, the filter material manufactured in the cutting step is set to a temperature of 0 to 20 from the softening temperature of the resin of the resin member.
After cooling to a temperature higher than ℃, the outer shape of the filter media is finished to be almost spherical in the finishing process, so that it is possible to avoid that the filter media is too soft and cannot be shaped. The material can be stably shaped into a sphere.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of a finishing apparatus according to the present invention.

FIG. 2 is a front view showing an example of the entire embodiment of the device according to the present invention.

FIG. 3 is a schematic diagram illustrating the process of the present invention.

FIG. 4 is a front view showing an example of a cutting step according to the present invention.

FIG. 5A is a perspective view of an example of an embodiment of a filter medium before finishing, and FIG. 5B is a perspective view of an example of an embodiment of the filter medium after finishing.

FIG. 6 is a perspective view of an example of an embodiment of a holding member used in the present invention.

FIGS. 7A and 7B show a part of a finishing apparatus used in the present invention, wherein FIG. 7A is a cross-sectional view and FIG. 7B is a cross-sectional view taken along line AA.

FIG. 8 is a perspective view of another example of the embodiment of the holding member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration material 2 Cutting piece 3 Resin member 4 Finishing device 5 Nipping member 6 Nipping member 7 Drive device 8 Inlet 9 Outlet 10 Path 11 Elastic member 12 Convex part 13 Air blow device 14 Cutting blade 15 Resin molding material

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B29L 31:06 B29L 31:06 31:14 31:14 (72) Inventor Atsushi Tsuji Kadoma, Osaka 1048 Oaza Kadoma Matsushita Electric Works, Ltd. F term (reference) 3C045 BA32 CA30 4D003 EA14 EA30 EA38 4D019 AA03 BA13 BB15 BC08 BD03 BD10 CB06 CB07 4F207 AG14 AH03 KA01 KA17 KW23 KW41

Claims (15)

[Claims] 1. A finishing apparatus for finishing an irregularly shaped filter medium made into a form in which thin strip-shaped cut pieces are gathered in a pleated shape by cutting a resin member into a substantially spherical outer shape. The filtering device manufacturing apparatus, comprising: a finishing device, a plurality of sandwiching members between which the filtering material of irregular shape is supplied, and a driving device that relatively displaces and drives the sandwiching members. A passage is formed between the holding members so that the filter medium held between the holding members moves from the inlet to the outlet while rotating and sliding with the relative displacement driving of the holding members. An apparatus for producing a filter medium, wherein the apparatus is manufactured. 2. The apparatus for producing a filter medium according to claim 1, wherein the inner diameter of the passage is gradually reduced from the inlet to the outlet. 3. The apparatus for manufacturing a filter medium according to claim 1, wherein the driving device rotationally drives at least one of the plurality of holding members. 4. The apparatus according to claim 3, wherein the passage is formed in a spiral shape with one end serving as an inlet and the other end serving as a discharge port. 5. The apparatus for producing a filter medium according to claim 4, wherein the inlet is provided on the outer peripheral end side of the holding member, and the discharge port is provided on the rotation center side of the holding member. 6. The apparatus for producing a filter medium according to claim 1, wherein an elastic member for preventing the filter medium from slipping is provided in the passage. 7. The passage according to claim 1, wherein the passage is provided with a convex portion or a concave portion for preventing the filter medium from slipping.
7. The apparatus for producing a filter medium according to any one of claims 6 to 6. 8. The apparatus for manufacturing a filter medium according to claim 1, wherein at least a part of a cross-sectional shape of the passage is an arc shape. 9. The apparatus for manufacturing a filter medium according to claim 1, further comprising an air blow device for blowing air to the filter medium discharged from the discharge port. 10. A filtering material having an irregular outer shape manufactured by cutting a resin member into a form in which thin strip-shaped cutting pieces are gathered in a fold shape, is supplied between the plurality of holding members,
The filter member is relatively displaced and driven to move the passage between the clamp members from the introduction port to the discharge port while rotating and sliding the filter medium held between the clamp members, so that the filter medium has a substantially spherical outer shape. A method for producing a filter medium, comprising: a finishing step of finishing the surface of the filter. 11. A forming step of forming a resin member by forming a resin molding material, and a filtering material having an irregular outer shape in a form in which thin cut pieces are gathered in a pleated shape by cutting the formed resin member. A cutting process of manufacturing the filter material, supplying the manufactured filter medium between the plurality of holding members, relatively displacing the holding member, and holding the filter medium held between the holding members while rotating and sliding. A finishing step of finishing the filter medium into a substantially spherical outer shape by moving a passage between the members from the inlet to the outlet. 12. A filter material is manufactured by cutting the resin member molded in the molding step in a cutting step before the temperature of the resin member falls below the softening temperature of the resin. The method for producing a filter medium according to claim 11. 13. A molding process, wherein a resin molding material is extruded to form a resin member in a rod shape, and the extruded resin member is continuously sent to a cutting process for cutting. The method for producing a filter medium according to claim 11 or 12, wherein 14. The method for manufacturing a filter medium according to claim 11, wherein in the cutting step, the filter member is manufactured by cutting the resin member while heating the cutting blade. Method. 15. A method of cooling a filter material manufactured in a cutting process to a temperature higher by 0 to 20 ° C. than a softening temperature of a resin of a resin member, and then finishing the outer shape of the filter material to a substantially spherical shape in a finishing process. The method for producing a filter medium according to any one of claims 11 to 14, wherein: