JPH10308A - Production of filter plate body of filter press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and inexpensively produce a filter plate body of a filter press which is lightweight and by which precise solid-liquid separation is performed. SOLUTION: Molding flasks 28, 28 serving to form a filter plate body to a filter frame 15 and the filter frame 15 are integrally assembled with recessed parts 22' being formed to a boss thereof. Molten rubber is forcibly fed from slurry feeding pipe inserting holes 22' to precisely fill every nook and corner of a forming part space 28' with it and to solidify it with time and to obtain an integrated filter plate body of the filter frame 15 and the filter plate body. In this way, not by press forming or the like, but by injecting molten rubber into a space forming part, a boss is precisely formed and casting or the like of a liquid discharge pipe like a T-shape is precisely performed according to design and production is made at low cost and operability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The disclosed technology belongs to the technical field of manufacturing a filter plate of a filter press for solid-liquid separation of a slurry containing wastewater from various production plants and sludge from a construction site.

[0002]

2. Description of the Related Art As is well known, industrial activities have prospered as citizens' lives have become significantly richer.
Along with this, pollution problems, including various manufacturing and construction industries, have also arisen, and in particular, the amount of slurry discharged from factory effluents and sludge from various work sites has become extremely large, If it is disposed of as it is, groundwater pollution, pollution of seawater, rivers, etc. will cause serious pollution problems of environmental destruction. Solid-liquid separation is carried out, and the liquid components are rendered harmless and discharged into rivers and drainage.Hazardous solids are incinerated and landfilled, or are recovered and used effectively. So-called filter presses are widely used because of various advantages such as high efficiency and reliable slurry treatment.

Such a filter press is, as shown in FIG.
A pair of stands 2 and 3 are erected on the base 1 so as to face each other.
Near the stand 2 on one side in the figure, the cast filter plates 4, 4,.
Along the guide rails 5, and
The frame is opened by the hydraulic cylinder 6 provided on the other stand 3,
The frame can be clamped freely, and the filtrate by the solid-liquid separation action in the frame clamped state is discharged through the drainage chute 7 in a predetermined manner.

In the filter press, FIG.
As shown in FIG. 7, each of the filter plate members 4 has, as described above, filtrate guide grooves 9, 9,... As rugged portions on both side surfaces of a filter plate body 8 'integrally having a filter frame 8 made of casting. Alternatively, the filter cloth 1 is engraved in a predetermined number of rows in the vertical direction, is connected to the lower filtrate outlet 10, and is attached to the front and back surfaces thereof.
The slurry supplied from the slurry supply port 12 to the filter cloth 1 is pressed at a predetermined high pressure when the frame is fastened to separate solid and liquid.
The filtrate 8 separated from 1 is guided to a filtrate outlet 10 through a filtrate guide groove 9 of a filter plate main body 8 ', and is subjected to a drainage treatment to perform solid-liquid separation.

Therefore, in each filter plate 4, the tightening pressure on each filter plate 4 by the hydraulic cylinder 6 against the slurry supplied at a high pressure is large,
It must have considerable strength and rigidity. Also, be careful not to damage the solid-liquid separation function not only during operation, but also during maintenance, inspection, maintenance and replacement, etc. In general, as described above, the filter plate body 8 'having the filter frame 8 integrally is made of a solid casting, and therefore has a considerable weight and requires a large amount of power and labor for handling. In addition to the disadvantage that the nature is complicated,
The power used by the hydraulic cylinder 6 when opening and closing the frame is large,
Moreover, not only the manufacturing but also the assembling requires a great number of man-hours, which has the disadvantage of increasing the cost, and also has the disadvantage that the maintenance is difficult.

In order to cope with this, there is the invention of Japanese Patent Application Laid-Open No. 2-268804, which is a prior application of the applicant, and it is easy to manufacture a filter press by using a short cylindrical filter frame. The filter press has the advantage that solid-liquid separation is performed by a large pressing force by using the pressure resistance of the circular cross section, easy to open and close the frame, low running cost, and good maintenance and serviceability. It is coming to practical use.

However, in this type of filter press, since the filter frame is formed in a ring-shaped short cylinder having a circular cross section, there is an inconvenience that it is difficult to add a mesh body such as a wire net or a filter cloth. .

On the other hand, in the invention of Japanese Patent Application Laid-Open No. Hei 3-202105, which is also a prior application of the present applicant, a short cylindrical filter frame having a circular cross section is provided with an edge portion of the filter cloth with respect to a peripheral flange. A technology has been devised to cover the entire surface of the filter cloth in an overhang shape, to improve the sealing property against the slurry, and to provide good serviceability for easy attachment / detachment operation. The drawback is that, when covering the flange of the filter frame, it is not only difficult to sew the opposing filter cloths with staples, etc., but also it is easy to wrinkle and it is difficult to bring out the complete cover state. was there.

Further, since the filter plate is formed in the shape of a rubber disk, there is a neck that the filter plate is easily deformed by the high pressure of the slurry when the frame is fastened. There is a disadvantage that the filter plate and the filter frame are displaced.

To cope with this, the applicant filed Japanese Patent Application No. 8-118179 filed on Apr. 17, 1996 (Japanese Unexamined Patent Application Publication No.
Patent Publication), a filter plate structure of a filter press that can perform high-efficiency solid-liquid separation, and has excellent operability and serviceability, has been devised to greatly contribute to the pollution prevention industry. I've been.

The filter plate of the filter press disclosed in Japanese Patent Application No. 8-118179 is shown in FIGS.
In brief, 4 'is a filter plate body which forms the center of the filter plate structure of the filter press which forms the center of the gist of the present invention, and 8' is a hard rubber disk having a hardness of 90 ° and an elongation of 120%. A filter plate main body, a peripheral portion of which is formed in a flange portion 14, and a slurry supply pipe 23 is set at the center portion in a sandwiching state via the flanges 24, 24. A predetermined number of short cylindrical bosses 22 are provided on both sides of the filter plate body 8 'in a ring-shaped arrangement so as to prevent deformation of the adjacent filter plate bodies 8', 8 'when the frame is fastened. In this embodiment, four filter members are integrally implanted and fixed with a space therebetween, and a mesh body 9 'made of synthetic resin is attached to the surface of the filter plate body 8', and the mesh body 9 ' On the surface of the predetermined filter cloth 1 similar to the conventional mode
1 ′ covers the flange 24 and the boss 22, and the peripheral portion thereof is bent integrally with the flange portion 14 so that the bolt 1
The filter plate body 8 ′ is integrally fixed to a casting filter frame 15 via an intermediary 8 so as to be fastened together.

In the mesh body 9 ', FIG.
As shown in (c), a forming hole 23 'through which the slurry supply pipe 23 is inserted at the center of the filter plate body 8', and each boss 2
2, a flange portion 91 is integrally formed in a ring shape around the peripheral portion with a flange portion 91 which is fastened to the flange portion 14 via bolts 18.

At the end of the slurry supply pipe 23, a slider 26 having a predetermined number of slits 25, 25,... The slurry can be pressed into and supplied to the slurry chamber 12 'between the adjacent filter plate bodies 8', 8 'through the slits 25.

As shown in FIG. 7B, the slurry is solid-liquid separated through the filter cloth 11 'and the mesh body 9' at the periphery of the filter plate body 8 '. The opening of the inlet part for injecting and flowing the filtered liquid component is provided at both ends.
As shown in FIG. 7 (e), a T-shaped drain pipe 27 for draining to the drain port 10 ″ of the fifth fitting 5 is fitted and set via a ring-shaped metal spacer 27 ′. The inner drain port 10 ″ of the filter frame 15 is a corresponding outer ring-shaped drain port 1.
0 'via a water hole 13.

It should be noted that one T-shaped drainage pipe 27 can be provided only at the lower portion of the filter frame 15 or a predetermined number at the periphery.

A semicircular notch 16 is provided on both sides of the filter frame 15 in a ring shape, and an O-ring 17 is fitted on one side of the notch 16 to tighten the frame of the filter frame 15. In this case, a sufficient sealing property with respect to the slurry at the time is ensured.

The T-shaped drain pipe 27 is used to set the filter plate body 8 in order to prevent the centering of the drain port 10 ″ from becoming unsatisfactory or fluctuating when it is set in the filter frame 15.
′, A ring-shaped metal spacer 27
Is screw-fitted so that the centering of the position of the T-shaped drain pipe 27 with respect to the drain port 10 ″ is securely held.

As shown in FIG. 7 (b), a pair of rail guides 5 ', A male pin 19 and a female pin 20 are fixedly opposed to each other at a diagonal position with respect to 5 'so that the centering of the filter frame 15 in the lateral direction at the time of initial setting and the function of preventing circumferential slip are performed.

In the above construction, a mesh 9 'made of resin is attached to the surface of each filter plate body 8' (the slurry supply pipe 23 and the holes 23 'are formed for each boss 22 at the time of the attachment). , Directly on the surface of the filter plate body 8 'via the recess 22').
The drain notch 9 and the like are not engraved on the surface of the filter plate 8 ′, and therefore, a state in which the strength of the filter plate body 8 ′ is insufficient does not appear.

A filter cloth 11 'is provided on the surface of the mesh body 9' so as to cover the flange portion 22 and the boss 22 of the slurry supply pipe 23, and a filter cloth 11 'is provided in the meantime. The mesh body 9 'and the filter cloth 11'
Drain pipe 2 with inlets at both ends facing
7 is set on the flange portion 14 of the filter plate body 8 'via a ring-shaped spacer 27', and bolts 18, 18 are attached to the filter frame 15 in which the O-ring 17 is fitted on one side of the ring-shaped notch 16. And fix them together integrally.

It is needless to say that the male pin 20 and the female pin 20 are integrally provided on the outer peripheral surface of the filter frame 15 in advance.

When the filter press is to be initially set, each filter plate body 8 ′ is set in a posture such that the bosses 22 of the adjacent filter plate bodies 8 ′ face each other, and Slider 26 is fitted, and filter frame 1
5 and the O-ring 17 is inserted into the female pin 20 of the adjacent filter frame 15 and the O-ring 17 is attached to the adjacent filter plate body 8.
′ Is brought into contact with the ring-shaped notch 16 so as to bring out the sealing state, and the initial setting of the filter press is completed.

The rail guides 5 ', 5' provided on both sides of the filter frame 15 are mounted on the rail 5 so as to be slidable in the axial direction. Through each slurry supply pipe 23,
When the slurry is fed in a predetermined manner, the slurry is supplied to the slurry chamber 12 'between the adjacent filter plate bodies 8', 8 'through the slits 25 of the slider 26, and the frame is moved through a hydraulic cylinder (not shown). When tightening is performed, each slurry chamber 12 ′
Is the O-ring 1 of the filter frame 15 abutting against
7 ensures that there is no leak due to sealing
The pressurized slurry passes through the filter cloth 11 ′, passes through the resin mesh body 9 ′, passes through the T-shaped drain pipe 27, and passes through the filter frame 1.
The filtrate is supplied to the drainage port 10 ″ inside 5, passes through the water hole 13, passes through the outer drainage port 10 ′, and passes through a tray (not shown), and the filtrate is discharged in a predetermined manner.

In the meantime, in the state of pressurizing the slurry during this time, the filter frame 15 which is pressurized in the axial direction by the hydraulic cylinder is secured by the O-ring 17, and the male pin 20 of the male pin 19 is fixed to the female pin 20. The axial and circumferential displacements are prevented by the fitting, and the filter plate bodies 8 'are prevented from being deformed even by a considerably high frame clamping pressure due to the contact between the bosses 22, 22, and the solidification. The liquid separating action is performed stably, and the T-shaped drain pipe 27 is also fixed in position by the ring-shaped spacer 27 ', and the solid-liquid separating action of each filter plate body 8' is stabilized as designed. Done.

When the pressurization of the hydraulic cylinder 6 is increased during the solid-liquid separation operation, each boss 22 of each filter plate body 8 'is increased.
Are crushed by each other, but the slurry passes through the gap between the bosses 22, and the filtrate is reliably discharged to the T-shaped drain pipe 27.

The pressing force of the hydraulic cylinder 6 is 40
Bosses 22 and 2
2 absorbs the compression deformation due to the surface contact, and the filter plate body 8
'Does not cause any deformation or deviation from the initial set position, and a stable solid-liquid separation action is reliably performed.

Therefore, unlike the conventional embodiment shown in FIG. 9, the filter plate body 4 'can be formed in a lightweight and small size without being made heavy, such as a cast product integrally formed with the filter frame 15, and can be formed under a high pressure. The pressure resistance against the pressing force is also sufficient, and the solid-liquid separation action is no different from the conventional mode, or is performed more efficiently than the conventional mode.

The number of the bosses 22, 22,... Can be appropriately increased according to the size of the filter plate body 8 ', and it is also possible to form a double ring. However, in such an embodiment, it is necessary to form a hole through which the slurry passes between the ring-shaped bosses.

When the solid-liquid separation operation is completed, the frame is opened via the hydraulic cylinder 6 and the slurry chamber 12 'is opened.
Is removed from the slurry chamber 12 'of the opened filter plate bodies 8', 8 'and removed, and is subjected to predetermined incineration disposal.

After removing the cake, the filter cloth 11 ',
In addition, when cleaning or replacing the mesh body 9 ', the mesh body 9' and the filter cloth 11 'are appropriately removed from the flange portion 14 of the filter plate body 8' via bolts 18 to perform predetermined maintenance such as cleaning processing. To serve.

At the time of the next solid-liquid separation, the frame is tightened again via the hydraulic cylinder 6 to supply the slurry, and the slurry is supplied to the solid-liquid separation.

The boss 2 is used in the solid-liquid separation process.
The mesh portion 9 'is not covered by the two portions, and the mesh portion 9' is not crushed by the adjacent bosses 22 because it penetrates.
The drain passage of the filtrate to the T-shaped drain pipe 27 through the 'is sufficiently ensured.

As described above, according to the invention of the present application, basically, a liquid containing a sludge such as a factory waste liquid or a slurry discharged from a construction site by a filter press is subjected to solid-liquid separation, and the filtrate is subjected to harmless treatment to obtain river water. When the cake is incinerated to reduce the volume and buried, the filter plate body 8 'of the filter press used has a hardness of 90 ° and an elongation of 120%. And the like, and the weight is remarkably reduced. The slurry supply pipe 23 is provided in the slurry chamber 12 'between the respective filter plate bodies 8', 8 '.
Is mounted at the center of the slurry supply pipe 23 and has a slider for slidably supplying the slurry to the slurry supply pipe 23, so that the displaced pressure distribution of the supplied slurry in the slurry chamber 12 'is reduced. This is an excellent effect that the filter plate main body 8 'made of rubber is not deformed in the first place.

Also, a predetermined number of bosses 22 are provided on the surface of the filter plate body 8 'so as to come into contact with each other when the adjacent filter plate bodies 8', 8 'come close to each other. Even when the pressing force of the slurry between the filter plate bodies 8 'is increased via the filter frame 15 due to the like, the bosses 22, 22 are brought into surface contact with each other and compressed to deform or displace the filter plate bodies 8', 8 '. And the like, whereby the drainage of the filtrate of the slurry through the filter cloth 11 'attached to the surface of the filter plate body 8' is ensured.

Further, a T-shaped drain pipe 27 is provided on the flange 14 at the peripheral portion of the rubber filter plate body 8 'so as to connect the drain port 10 of the filter frame.
'', The T-shaped drain pipe 27 has a kind of centering positioning function,
Further, when the pressing force against the slurry via the hydraulic cylinder 6 is increased, deformation, displacement and the like are prevented, and drainage of the filtrate from the slurry between the adjacent filter plate bodies 8 ', 8' is ensured. An effect that the liquid is surely performed is exerted.

The filter cloth 11 'is attached to the filter plate main body 8' via a mesh body 9 'made of a synthetic resin, so that the filter plate main body 8' has a conventional structure. As described above, there is no decrease in strength due to a water notch or the like and no deformation due to a large pressing force, and the filtrate is surely and smoothly drained to the T-shaped drain pipe 27 through the mesh body 9 '. This has the effect of being performed.

Further, the mesh body 9 'and the filter cloth 11' are fastened to the flange portion 14 of the rubber filter plate body 8 'via bolts 18 with respect to the outer filter frame 15, whereby the mesh body 9' and the filter cloth 11 'are tightened. It is easy to set the mesh body 9 'and the filter cloth 11', and the mesh body 9 'after opening the frame and dropping the cake.
There is also an effect that maintenance such as cleaning and replacement of the filter cloth 11 'is extremely easy.

Also, as described above, the filter plate body 8 set
'Positioning pin 1 on ring-shaped filter frame 15
The provision of the components 9 and 20 provides an excellent effect that positioning at the time of initial setting is easy, side slip at the time of pressurization and displacement in the axial direction are prevented, and solid-liquid separation can be performed as designed. Is done.

Further, a T-shaped drain pipe 27 provided on the peripheral edge of the filter plate body 8 'is provided on the flange 14 of the rubber filter plate body 8' via a ring-shaped spacer 27 '. Even when there is a possibility that the filter plate body 8 'may be deformed unexpectedly, the T-shaped drain pipe 27 can be maintained in a position accurately facing the drain port 10''of the filter frame. ,
Therefore, an excellent effect is achieved in that the solid-liquid separation action is performed as designed and is performed with high efficiency.

By adopting such a structure of the filter plate body 4 ', the filter plate body 8' is made of rubber and lightened, but is applied to the frame clamping pressing slurry of 40 to 100 atm. The filter plate body 8 'has a hardness of 90 ° and an elongation of 120%.
The filter plate body 8 ′ always maintains a stable solid-liquid separation posture through the crushing action of the bosses 22, 22 of the filter plate bodies 8 ′, 8 ′ in contact with each other. Liquid separation function can be performed, the weight can be reduced compared to the conventional cast filter plate, and moreover, it can withstand high frame clamping pressure and perform stable and efficient solid-liquid separation function. The effect is achieved.

[0041]

However, even in the structure of a filter plate 4 'of a novel filter press having such a number of excellent points and performing a high-efficiency solid-liquid separation, the filter plate 4' has the same structure. The plate body 8 'is made of rubber and has a hardness of 90
°, and an elongation ratio of 120%, etc., it is extremely light in use, has an excellent effect of avoiding displacement of pressure distribution and not being deformed. For the manufacture of the filter plate body 8 ', for example, there is only means such as press molding with a mold, and therefore,
There was a disadvantage that press molding was extremely difficult due to the physical properties of the rubber.

Accordingly, it is difficult to form the filter plate main body 8 ', which causes a disadvantage that the solid-liquid separation function of the filter press cannot be exhibited as designed.

[0043]

SUMMARY OF THE INVENTION It is an object of the invention of the present application to provide a filter press having the above-mentioned many advantages based on the above-mentioned prior art, and a problem in a manufacturing process of a filter plate body integrated with a filter frame having a rubber filter plate body. Is a technical problem to be solved, and a hardness of 90
°, The filter plate body as designed is extremely easily inserted by pressing the rubber filter plate body having the property of elongation rate of 120% in a molten state with the molds on both sides and the filter frame as a kind of mold. It is an object of the present invention to provide an excellent method for producing a filter plate for a filter press, which is advantageous in the field of application of solid-liquid separation technology in the pollution control industry.

[0044]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the structure of the invention of the present application, in order to solve the above-mentioned problem, a rubber filter plate is provided in a filter frame. A method for manufacturing a filter plate having an uneven portion on a separating surface, wherein rubber in a molten state is press-fitted into a space formed by the filter frame and a mold forming the front and back surfaces of the filter plate body. At this time, the molten rubber was press-fitted from either the filter frame or the slurry supply site of the mold, and the filter frame and the filter plate body were integrated to form a filter plate as designed. It takes technical measures.

[0045]

The molten rubber is press-fitted into a space formed by the filter frame and the mold forming the front and back surfaces of the filter plate body, whereby a boss of the filter plate body and a flange to the filter frame are formed. The part is formed as designed and when performing solid-liquid separation processing,
Even when the frame is clamped in a high-pressure state, the filter plate body is not deformed, integrated with the filter frame, and the filtrate is securely drained from a T-shaped drain pipe provided on a flange portion of the filter frame. The cake remains in the slurry chamber between the plate bodies, and the cake is removed by opening the frame, so that the solid-liquid separation action is performed by a highly efficient filter press as designed.

[0046]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG.

Note that the same parts as those shown in FIG. 7 and subsequent figures are described using the same reference numerals.

In the embodiment shown in FIG. 1, reference numeral 15 denotes a filter frame shown in FIG. 7, and an ospin 19 and a mespin 20 are integrally fixed to an appropriate portion of a peripheral portion thereof through an appropriate bracket. In the embodiment shown in FIG. 1, a plug 29 is hermetically provided in the water passage hole 13 of the filter frame 15, and the filter plate body 8 '(shown in FIG. 7B). The molds 28, 28 molded from both sides of the boss 22 have a flat bottomed recess 22 'as a molded part for the boss 22.
, 22 '... Are integrally assembled from both sides of the filter frame 15, and a T-shaped drain pipe 27 is connected to a drain port 10''thereof via a metal ring-shaped spacer 27'. It is fixed.

A bolt 18 for fastening the flange portion 14 of the filter plate body 8 'to the filter frame 15 is fixed between the filter frame 15 and the mold frame 28 via a predetermined metal flange ring 30. ing.

A filter frame 15 is provided on both sides of the filter plate body 8 '.
A forming hole 23 'for the slurry supply pipe 23 is formed in a central portion of the two mold frames 28 integrally assembled with each other, and a collar 31 is provided in a forming space 28' between the two mold frames 28. ing.

In this embodiment, FIG.
A rubber (not shown) previously melted at a high temperature is press-fitted into a forming hole 23 'for inserting the slurry supply pipe 23 of the mold 28 shown in FIG.
8 ', and the forming recesses 22' of the boss 22 and T
The mold drain pipe 27 and the drain ports 10 ′ and 10 ″ are filled and filled with pressure, and after the filling, they are subjected to a cooling treatment to be solidified.

At this time, the forming space 28 'is sufficiently covered with the molten rubber by the collar 31 provided inside the forming hole 23', and the T-shaped drain pipe 27 and
Since the cap-type plugs 29, 29 'are sealed in advance in the water passage hole 13 in a sealed manner, the molten rubber does not enter the T-shaped drain pipe 27, and It is filled throughout and solidifies over time.

When the molten rubber has been solidified after a predetermined period of time, the molds 28, 28 are removed, and the solidified rubber filter plate body 8 'having a hardness of 90 ° and an elongation of 120% is removed. Bolt 18 via the flange portion 14,
The T-shaped drain pipe 27 is integrally cast, and the metal spacer 27 'is also integrally cast with the filter frame 15 to form the filter plate 4'. .

Here, as described above, the slurry supply pipe 23 and the slider 26 are set in the forming hole 23 'at the center of the filter plate main body 8', and the drain ports 10 'and the cap type of 10''are formed. The plugs 29, 29 'are removed, a mesh 9' made of synthetic resin and a filter cloth 11 'are attached to the surface of the filter plate body 8', and subjected to solid-liquid separation as a filter plate 4 'of a filter press. .

The function of the filter plate 4 shown in FIG.
Works the same as'.

When the solid-liquid separation is performed, the bosses 22, 22 of the filter plate bodies 8 ', 8' set on both sides of the slurry chamber 12 'come into considerable contact with each other, despite the considerable high frame clamping pressure. In order to prevent the deformation of each filter plate body 8 'and to ensure the solid-liquid separation action in the slurry chamber 12', each boss 22 must be formed as designed. However, in the embodiment shown in FIG. 1, since the high-pressure molten rubber is press-fitted into the forming space 28 'between the two molds 28, 28, the molten rubber goes all the way to the recess 22'. Over time, the bosses 22 are formed as designed, and high-performance solid-liquid separation is performed as designed.

In the filter plate 4 'shown in FIG. 7, there is disclosed a technique of interposing a muscular body inside the filter plate main body 8' in order to maintain the strength and rigidity of the filter plate main body 8 '. However, in the embodiment shown in FIG.
In this embodiment, a metal mesh body 32 is interposed as a muscular body through an appropriate spacer in a space 28 'between the forming portions, and is integrally cast into a high-pressure injected molten rubber to cope with this. .

In the embodiment shown in FIGS. 1 and 2, the high-pressure injection of the molten rubber into the forming space 28 'between the two molds 28, 28 is performed by forming the forming hole 23' of the slurry supply pipe 23 in the central part. Although it is an embodiment to perform from,
In the embodiment shown in FIG. 3, a cap-type plug 31 'is tightly plugged in the formation hole 23', and the drain port 10 of the filter frame 15 is closed.
In this embodiment, the molten rubber is injected from the side of the water hole 13 of the ′, 10 ″. In this embodiment, a cap type plug body 29 is previously disposed in the T type drain pipe 27 and the T type The drainage pipe 27 is not filled with the molten rubber.

Then, both the mold frames 28, 28 and the filter frame 1
When the molten rubber is press-fitted between the five,
'Is filled with molten rubber, and T-shaped drain pipe 2
7, the spacer 27 'and the bolt 18 are integrally cast into the molten rubber at the flange portion 14, and the filter plate 4' shown in FIG.

In this embodiment, the molten rubber may be press-fitted through the water holes 13 at one water hole 13 shown in FIG. It can also be press-fitted.

Next, the embodiment shown in FIG.
The flange portion 14 of the filter frame 15 is securely fastened to the filter frame 15 so that the filter frame 15 is not moved in the circumferential and axial directions.
A ring-shaped groove 32 having a semicircular cross-section is provided on the inner surface of the filter plate, and molten rubber to be injected and filled under high pressure spreads over the groove 32, and the flange portion 14 of the filter plate body 8 'is securely tightened to the filter frame 15. This is an aspect in which molding can be performed so that displacement and rattling in the circumferential direction and the axial direction do not occur.

In the embodiment shown in FIG. 6, the plate 33 is set in the concave portion 22 'of the formwork 28 in order to form the plate 33 on the contact surface of the boss 22. Sulfurization treatment 34 is performed in advance, and bolts 18 of the flange portion 14 with respect to the filter frame 15 are tightened to the filter frame 15.
The outer surface of the ring-shaped flange ring 30 is also subjected to a vulcanization treatment 34 'in order to maintain the tightened state, so that the high-pressure injected molten rubber, the surface contact plate 33, and the flange ring 30 are well integrated. This is an embodiment in which:

It should be noted that the embodiments of the invention of this application are not limited to the above embodiments. For example, when a high-pressure molten rubber is press-fitted into the forming section space 28 ', a central slurry supply pipe is formed. An adjustment method for unilaterally press-fitting through the holes 23 'and discharging the small amounts little by little from the water holes 13 of the filter frame 15 to more reliably fill the forming space 28' with the molten rubber. Various modes such as adoption can be adopted.

[0064]

As described above, according to the invention of this application, there is provided a filter plate body in which a filter plate body made of rubber and having a predetermined number of bosses on its filtration surface is integrally fixed to a filter frame. In the production of the filter plate of the filter press having solid-liquid separation performance, the molten rubber is pressed into the space formed by the filter surface forming mold forming the boss and the filter frame, whereby the molten rubber is bossed. In order to ensure that all parts of the concavo-convex part are completely filled as designed, and that it can be integrated with the filter plate, the filter frame and the T-shaped drainage pipe are integrally cast. Since the filter plate can be formed, an excellent effect that the filter plate can be accurately formed with high precision as designed, regardless of means such as press molding, is exhibited.

Further, by performing the vulcanization treatment on at least one of the flange ring and the filter frame, an excellent effect that the integration with the molten rubber is performed accurately as designed. Is played.

[Brief description of the drawings]

FIG. 1 is a schematic half sectional view of an embodiment of the present invention.

FIG. 2 is a schematic half sectional view of another embodiment.

FIG. 3 is a schematic half sectional view of yet another embodiment.

FIG. 4 is a partially cutaway perspective view of a mold according to the invention of this application.

FIG. 5 is an enlarged cross-sectional view of a part where a flange portion and a filter frame of another embodiment are integrally formed.

FIG. 6 is an enlarged cross-sectional view showing a vulcanizing process of a surface contact plate and a flange ring.

FIGS. 7A and 7B are explanatory views of the filter plate body of the already applied application; FIG. 7A is an enlarged perspective view with a partial cross section cut off of the filter plate body; FIG. Is an enlarged perspective view of the mesh body, (d) is a partially enlarged side view of the slurry supply pipe, (e) is a partially cross-sectional enlarged view of the T-shaped drain pipe, and (f) is a mesh body. FIG. 4 is a side view of the connection between the filter cloth.

FIG. 8 is a schematic side view of a general embodiment of a filter press.

FIG. 9 is a cross-sectional view of a filter plate according to the prior art.

[Explanation of symbols]

 15 Filter frame 8 'Filter plate body 22 Irregularities 28 Form 23' Slurry supply pipe insertion hole 30 Flange ring 18 Bolt 34, 34 'Vulcanization

Claims (11)

[Claims] 1. A method for producing a filter plate body in which a filter plate main body made of rubber has an uneven portion on its filtration surface in a filter frame, wherein the filter frame and a filter surface forming mold having the uneven portion are provided. 2. A method for producing a filter plate of a filter press, characterized in that molten rubber is press-fitted into a space formed by (1). 2. A method for manufacturing a filter plate for a filter press according to claim 1, wherein the press-in of the molten rubber is performed from the mold side. 3. A filter plate for a filter press according to claim 2, wherein said press-in of said molten rubber is carried out from a formation hole of a slurry supply pipe at a central portion of a mold. Method. 4. A method for producing a filter plate for a filter press according to claim 1, wherein the press-in of the molten rubber is performed from the filter frame side. 5. A method for manufacturing a filter plate for a filter press according to claim 4, wherein the press-in of the molten rubber is performed from a filtrate outlet portion of the filter frame. 6. A filter plate for a filter press according to claim 4, wherein the filter frame and the filter plate main body are integrated with time through the solidification of the molten rubber liquid. Body manufacturing method. 7. A filter press according to claim 6, wherein a portion facing the filter frame is interposed with a metal flange ring through the solidification of the molten rubber liquid. Filter plate manufacturing method. 8. The method according to claim 7, wherein at least one of said flange ring and said filter frame is vulcanized. 9. A method for manufacturing a filter plate for a filter press according to claim 7, wherein the filter frame and the flange ring are fastened through a bolt after solidification of the rubber liquid. 10. A method for manufacturing a filter plate for a filter press according to claim 7, wherein the positioning of the filter frame and the molten rubber is performed. 11. The method for manufacturing a filter plate of a filter press according to claim 1, wherein a streak body is interposed in a space where the filter plate and the filter plate main body are formed.