JPH11179712A - Method and apparatus for drainage molding of wet powdered material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dewater a wet powdered material efficiently, to improve molding efficiency, to keep good mold releasing properties, and to obtain a molding having good properties from a wet powdered material. SOLUTION: Filters 50, 60 which formed the side facing a cavity space S with a water-permeable polymer material are provided on each wall surface of an upper mold 30 and a lower mold 20, the water of a wet powdered material W is discharged from each drain hole 21..., 31... of the upper mold 30 and lower mold 20 outside the mold through the polymer material of each filter 50, 60, and a molding of the powdered material W is released from the mold surfaces of the upper mold 30 and the lower mold 20 by each polymer material of the filters 50, 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a process of dehydrating a slurry-type wet powder material and forming a molded article of a predetermined shape from the wet powder material in a process of manufacturing a ceramic product. The present invention relates to a method and apparatus for draining a wet powder material.

[0002]

2. Description of the Related Art Conventionally, a tube press and a rotary dehydrator have been used for dehydrating and molding wet powder materials. However, in these devices, the material shape after the dewatering process is unstable, and it must be preformed before transfer to the next process. Therefore, the number of processes is large and the dewatering process and the preforming process must be processed in a batch system. The work is extremely time-consuming from where it must be.

[0003] In addition, a cavity space is formed by a cylindrical frame mold, a lower mold slidably fitted in the frame mold, and an upper mold for closing an open end of the frame mold, and supplied into the cavity space. The wet wet powder material in a slurry state is compressed by the upper mold and the lower mold, and the water in the wet powder material is removed from the mold by a drain hole that communicates from the mold surface through a filter provided on the upper mold surface. In addition, a filter press apparatus is known which compresses a molded body having a predetermined shape from a wet powder material while discharging the molded body from a wet powder material (for example, JP-A-7-183148). In this filter press device, since the water in the wet powder material is drained only from the upper mold side, the dewatering process takes time and the molding efficiency is poor.

[0004] On the other hand, there has been proposed a filter press device for discharging moisture in a wet powder material from the upper and lower mold surfaces to the outside of the mold (Japanese Patent Laid-Open No. 52-119).
612). Further, the filter press device is configured by including an upper die having a filtration hole communicating from the die surface to the outside of the die, and a lower die made of porous metal titanium.

[0005] In the filter press device, since the filtration process is performed by the filtration hole provided in the upper mold and the porous metal titanium, the dewatering function is liable to be deteriorated due to clogging of the wet powder material in the hole. In addition, since it is difficult to form the internal structure of the porous titanium metal into a uniform structure, it is necessary to adjust the dehydration time and the compression condition according to the structure conditions. Furthermore, a complicated operation of spraying a release agent every time to maintain the releasability of the wet powder material from the molded body is required, which leads to an increase in cost.In particular, when the wet powder material is a ceramic powder, metallic titanium becomes an impurity. It is not preferable because it may be mixed as

[0006] In addition to the porous metallic titanium, it has been proposed to use a filter having a cloth-like surface on the side facing the cavity space (Japanese Patent Laid-Open No. 4-323302).
issue). However, this cloth-shaped filter is not only poor in durability in use, but also has a problem in releasability from a wet-powder material compact.

[0007]

SUMMARY OF THE INVENTION According to the present invention, the wet powder material can be efficiently dewatered, the efficiency of the molding process can be improved, and the releasability is good. It is an object of the present invention to provide a method and apparatus for draining and molding a wet powder material from which a body can be obtained.

[0008] In addition, the present invention provides a high-quality molded product from a wet powder material, and simplifies the process including the step of removing the molded product, and drains the wet powder material that can be processed continuously. It is an object to provide a molding method.

Another object of the present invention is to provide an apparatus for draining and forming a wet powder material capable of mechanically improving the durability during use and exhibiting good functions.

[0010]

According to a first aspect of the present invention, there is provided a method for draining and molding a wet powder material, comprising: a cylindrical frame mold; and a lower mold slidably fitted in the frame mold. A cavity space is formed by the upper mold that closes the open end of the frame mold, and while the slurry-like wet powder material supplied into the cavity space is compressed by the upper mold and the lower mold, A cavity is formed of a water-permeable polymer resin material in order to discharge moisture out of the mold through drain holes communicating with the upper and lower mold surfaces, and to compress and mold a predetermined shape from a wet powder material. A filter having a side facing the space is provided on each of the upper and lower mold surfaces, and the moisture of the wet powder material is removed from the upper and lower mold drain holes through the polymer resin material of each filter. Into the upper and lower dies. It is adapted to release a resin material of each of the filter from the mold surface.

According to a second aspect of the present invention, there is provided a method for draining and molding a wet powder material, wherein the wet powder material is supplied into the cavity space, and then the upper mold and the frame mold are closed. During the compression of the upper mold and the lower mold, the compression of the wet powder material is temporarily stopped, the upper mold and the frame mold are opened with a slight gap, and the pressure remaining inside the cavity space is released. The wet powder material is finally compression-molded by an upper mold and a lower mold.

According to a third aspect of the present invention, there is provided a method for draining and molding a wet powder material, wherein the frame is lowered by lowering the frame mold while holding the compact of the wet powder material after compression molding. After exposing the peripheral side surface of the body to the outside from between the upper mold and the lower mold, the upper mold is raised from the lower mold to take out and transfer the molded body of the wet powder material from the mold surface of the lower mold. .

According to a fourth aspect of the present invention, there is provided an apparatus for draining and forming a wet powder material, comprising: a cylindrical frame, a lower die slidably fitted in the frame, and opening of the frame; A cavity space is formed by the upper mold that closes the end, and while the slurry-type wet powder material supplied into the cavity space is compressed by the upper mold and the lower mold, the moisture in the wet powder material is removed by the upper mold and the upper mold. It is discharged out of the mold through a drain hole that communicates from each mold surface of the lower mold, and a molded body of a predetermined shape is formed from the wet powder material by compressing the moisture of the wet powder material into the upper mold and the lower mold. The side facing the cavity space by the polymer resin material having water permeability, also serving as a filtering means for draining water from the surface and a releasing means for releasing the molded body of the wet powder material from the upper and lower mold surfaces. To provide the upper and lower molds with filters with It is configured Ri.

According to a fifth aspect of the present invention, there is provided an apparatus for draining a wet powder material, wherein the drainage holes of the upper die and the lower die are provided with the same number, opening position and opening diameter forming condition. ing.

In the wet powder material draining apparatus according to the sixth aspect of the present invention, the upper and lower filters are made of polyethylene, polyester, nylon, aramid, or the like.
It is constituted by providing a filter having a side facing the cavity space made of a polymer resin material of acrylic or polyvinyl chloride.

In the wet powder material drainage molding apparatus according to claim 7 of the present invention, the upper mold and the lower mold are each provided with a polymer resin material on the side facing the cavity space, and each of the upper mold and the lower mold. It is configured by providing a laminated sheet with a metal mesh or a nylon mesh on the side facing the mold surface.

The wet powder material draining and forming apparatus according to the eighth aspect of the present invention is configured such that a filter wound in a roll shape is fed out as a filter and is mounted on the upper die side so as to be able to be wound up.

According to a ninth aspect of the present invention, there is provided an apparatus for draining and forming a wet powder material, wherein a filter is provided on the lower mold side as a filter, which is wound around the mold surface from the mold surface and is removable with a holding ring. ing.

The wet powder draining apparatus according to the tenth aspect of the present invention is provided with a water leakage preventing means interposed between the frame mold and the lower mold.

In the wet powder material draining apparatus according to the eleventh aspect of the present invention, a packing formed of any of Kepler fiber, Teflon fiber, graphite fiber and asbestos fiber is provided as a means for preventing water leakage. It is configured.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, FIG. 1 shows a mold structure which is a main part of a drainage molding apparatus by one mold portion. In this mold structure, a cylindrical frame mold 10 is used.
Then, a cavity space S is formed by the lower mold 20 slidably fitted in the mold of the frame mold 10 and the upper mold 30 closing the open end of the frame mold 10. Also, the cavity space S
The slurry-type wet powder material W supplied into the inside of the
In addition to discharging the moisture in the wet powder material out of the upper mold 30 and the lower mold 20 from the respective mold surfaces while compressing with the lower mold 20 and the lower mold 20, a compact having a predetermined shape is formed from the wet powder material W by compression molding. It is configured to do.

The lower mold 20 and the lower mold 30 are provided with a plurality of drain holes 21... 31 as vertical through holes communicating with the water storage portions 22 and 32 from the respective mold surfaces.
A drain passage is provided for forcibly sucking and discharging the moisture of the wet-type powder material W from the drain outlets 23 and 33 to the outside of the mold via the water storage portions 22 and 32. In the lower mold 20 and the upper mold 30, the drain holes 21, 31,... Are provided with the same number, the opening position, and the forming condition of the opening diameter.

In the lower mold 20, the water storage section 22 forms the lower mold plate 24 as a rectangular cylinder so that the lower mold plate 2 is formed.
4 is provided inside. From the water storage unit 22,
A drain port 23 is provided to pass through the inside of the lower mold mounting plate 25 and communicate with the outside of the mold. On the other hand, in the upper mold 30, the water containing portion 32 is provided in the mold held by the upper mold plate 34, and the drain port 33 is provided on the side of the mold so as to communicate with the outside of the mold from the water containing portion 32. Have been.

The lower mold 20 is positioned and mounted on the upper side of the lower mold plate 24 with the planting pins 26, and the lower mold 20 and the lower mold plate 24 are positioned.
Are detachably mounted and fixed by a clamp 28 having a U-shaped cross section which is fitted and stopped with the concave portion 27 for clamping extending over both side surfaces of the clamp. The frame die 10 is provided with a slurry supply port 11 for filling the inside of the cavity space S with a wet wet powder material W in the form of a slurry in which a powder material such as a ceramic raw material is primarily mixed.

A water leak preventing means 40 is provided between the frame mold 10 and the lower mold 20. The water leakage prevention means 40 is assembled so as to keep the space between the frame mold 10 and the lower mold 20 watertight and to support the frame mold 10 with the lower mold 20 so as to be able to slide smoothly. The water leak preventing means 40 may be provided with a packing 41 formed of any of Kepler fiber, Teflon fiber, graphite fiber and asbestos fiber having excellent wear resistance. This packing 4
1 can be detachably attached to the frame mold 10 by pressing it with the retaining ring 42 and tightening it with the screw 43.

The lower mold 20 and the upper mold 30 serve as filtering means for draining the water of the wet powder material W, and also as release means for releasing the molded body of the wet powder material W from the mold surface. Filters 50 and 60 each having a surface facing the cavity space S made of a water-permeable polymer resin material are provided on each mold surface. The polymer resin material of the filters 50 and 60 not only functions as a filtering means because of water permeability, but also has excellent use durability as well as releasability from a wet powder material W molded article due to its flexibility due to the material. As the polymer resin material having water permeability, polyethylene, polyester,
Any of nylon, aramid, acryl, and polyvinyl chloride is preferably used, which is preferable because it is more excellent in mold releasability from a wet powder material W and a use durability.

As shown in FIG. 2, the filter itself includes a polymer resin material 50 a facing the cavity space S and a stainless steel filter disposed on the side facing the mold surface of the lower mold 20. A laminated sheet with the metal mesh 50b is preferable. This can exhibit a more excellent water draining function due to the synergistic action with the polymer resin material 50a in addition to the releasability and the use durability. Instead of a metal mesh such as stainless steel, a nylon mesh made of 66 nylon can exhibit the same function, and can be more easily handled as a laminated sheet than with a metal mesh.

As the filters 50 and 60, the upper die 30
The reels 61, 62 are fed out as shown in FIG.
May be provided on both sides of the mold, and a filter 60 wound in a roll shape capable of being fed out and replaced according to the number of uses may be provided.
On the other hand, since the lower die 20 is disposed inside the frame die 10, a pair of pressing rings 51a, 5a are provided as shown in FIG.
It is preferable to provide a removable filter 50 in 1b. The filter 50 is detachably mounted by winding the terminal around the mold from the mold surface, supporting the terminal from the periphery with a pair of pressing rings 51a, 51b, and tightening and fixing with screws 52. This filter 50 can be equipped so that it can be replaced more easily than with an adhesive and that peeling during use can be reliably prevented.

Each part of the mold is mounted on a fixed plate 71 installed on the upper side of the body frame 70 as shown in FIGS. The lower die 20 and the lower die plate 24 are installed on the surface of the fixed platen 71 with the lower die mounting plate 25. Further, thrust bearings 72a to 72d are fitted and fixed on the board surface of the fixed board 61, and four guide rods 73a to 73d supported by the respective thrust bearings 72a to 72d are vertically inserted and arranged. The guide rods 73a to 73d have an upper die 3
The upper mold plate 34 and the upper mold plate 34 are arranged on the upper end of the shaft by being supported by the upper mold mounting plate 35.

A movable plate 74 is mounted and fixed to the lower ends of the shafts of the guide rods 73a to 73d. Between the movable plate 74 and the fixed plate 70, a center cylinder 80 and side cylinders 81 and 82 are capable of moving in a stroke manner. Equipped with handover. The center cylinder 80 and the side cylinders 81 and 82 include a movable plate 74, guide rods 73a to 73a.
The upper die 30 is provided to move up and down via 3d. Further, since the lower mold 20 is provided in a plurality of units as shown in FIG. 6, the side cylinders 81 and 82 are arranged side by side with the center cylinder 80 as shown in FIG. Is equipped with

As shown in FIG. 5, the frame die 10 has thrust bearings 13a to 13d fitted and fixed on the plate surface of the frame die plate 12, and guide rods 73a to 73d are inserted through the thrust bearings 13a to 13d. Accordingly, the guide rods 73a to 73d are supported so as to be vertically movable on the axis thereof. Further, the frame die 10 is provided with drive cylinders 83 and 84 mounted on the lower side of the fixed platen 70 by connecting the tip of a cylinder rod protruding above the fixed platen 70 to the frame die plate 12. Each drive cylinder 83, 8 for this frame type
As shown in FIG. 4, there is provided a component 4 that is driven downward by receiving a pressing force accompanying the lowering of the upper mold 30 when compressing the wet powder material W as described later.

In addition to the above-mentioned respective mechanical parts, as shown in FIG. 8, a molded body transfer mechanism for taking out and transferring a molded body W 'having a predetermined shape, which has been compression molded from a slurry wet powder material, from one surface of the lower mold 20. 90 are provided. This molded body transfer mechanism 90 is provided with a suction pad 91 on a moving block 92,
The moving block 92 is slidably supported by a guide shaft 93 extending from the front to the back of the drawing, and a suction pad 91 is provided.
Is configured to be movable along a guide shaft 93 by a screw shaft 94, and is equipped so as to take out and transfer the compact W ′ of the wet powder material to the next step.

In the wet powder material draining / molding apparatus constructed as described above, first, as shown in FIG. 1, the frame mold 1 is positioned such that the upper end surface of the frame mold 10 is positioned higher than the mold surface height of the lower mold 20.
0 is moved upward by the drive cylinders 83 and 84. Depending on the elevation of the frame mold 10, a cavity space S capable of accommodating a predetermined supply amount of wet powder W is formed from the mold surface of the lower mold 20 and the inside of the frame mold 10. At this time, the upper mold 3
Reference numeral 0 denotes a standby state at a rising position away from the frame die 10, and the slurry-type wet powder material W is supplied into the cavity space S from a slurry supply port 11 provided on a side surface of the frame die 10.

When the inside of the cavity space S is filled with the slurry type wet powder material W, the supply path of the wet powder material W connected to the slurry supply port 11 is closed by a mechanism not shown. Next, the center cylinder 80 and the side cylinders 81 and 82 are extended in stroke to move the movable plate 74.
And the upper die 30 is moved down via the guide rods 73a to 73d. As shown in FIG. 9, the upper die 30 abuts the die surface on the upper end surface of the frame die 10 via the filter 60, and closes the die with the frame die 10 to form the cavity space S.
Seal.

The wet powder material W is compressed by further extending the center cylinder 80 and the side cylinders 81 and 82 from the closed state of the cavity space S.
The wet powder material W is compressed between the mold surfaces of the lower mold 20 and the upper mold 30 because the frame mold 10 follows and descends with the pressing force caused by the lowering of the upper mold 30. With the compression of the wet powder material W, only the moisture contained in the wet powder material W is removed from the upper mold 30.
Are passed through the filters 50 and 60 provided in the lower mold 20 and are discharged through both the drain holes 21... 31. Therefore, water can be efficiently drained from the inside of the cavity space S. In particular, since the drain holes 21... 31 of the upper die 30 and the lower die 20 are provided with the same number, opening position and opening diameter forming condition, the upper and lower dies 20, 30 are formed.
Effective drainage can be performed in a more balanced manner.

The water that has passed through the drain holes 21, 31, accumulates in the water container 32 provided in the upper die 30 and is discharged from the drain port 33 to which a negative pressure is applied. It is sucked and discharged outside. Further, in the lower mold 20, the water falls into the water accommodating portion 22 of the lower mold plate 24 from the drain holes 21 and is similarly discharged out of the mold from the drain port 23 of the upper mold mounting plate 25. At the time of draining, since the packing 41 for preventing water leakage is interposed between the frame mold 10 and the lower mold 20, it is possible to prevent not only the powder material but also water leakage.

While the wet powder material W is being compressed by the upper mold 30 and the lower mold 20, the compression of the wet powder material W is temporarily stopped as shown in FIG. The mold is opened at a small gap G. This mold opening is to release the pressure remaining inside the cavity space S. If the residual pressure is inside the cavity space S, the powder content of the molded body will be reduced when the mold is finally opened. In this case, a molded article having a predetermined shape cannot be obtained. The mold opening can be performed by slightly raising the frame die 10 together with the upper die 30 to temporarily stop the frame die 20, and repeating this raising and temporary stop several times. The mold opening gap G may be set to about 5 to 10 mm.

When the residual pressure is removed and the wet powder material W is finally compressed to a predetermined thickness by the upper mold 30 and the lower mold 20, the operation of the upper mold 30 and the frame mold 10 is stopped. Thereafter, as shown in FIG. 11, while holding the wet powder compact W 'with the upper mold 30 and the lower mold 10, the frame mold 20 is lowered to lower the peripheral side surface of the compact W' to the upper mold 30. And the lower mold 20 is exposed to the outside.

This is to completely release the residual pressure before the upper die 30 rises in consideration of the case where the residual pressure remains even a little. Lower mold 2
The height may be up to the height position where the 0 mold surface coincides. The frame type 1
As the molded body W ′ of the wet powder material appears on the mold surface of the lower mold 20 as a whole with the decrease of 0, the upper mold 30 is raised from the lower mold 20 as shown in FIG. The molded body W ′ of the wet powder material can be immediately taken out from the mold surface of the lower mold 20 and transferred.

As the upper die 30 moves upward, the filter 60 is formed of a polymer resin on the side of the filter 60 facing the cavity space S, and the filter 60 is wet-typed by the flexibility of the polymer resin. The mold can be easily released from the compact W ′ of the powder material. Similarly, when the molded body W ′ of the wet powder material is taken out from the mold surface of the lower mold 20, since the side of the filter 50 facing the cavity space S is formed of the polymer resin material, the wet powder The molded product W ′ of the material can be easily released from the filter 50.
The removal of the compact W ′ can be easily performed using the suction pad 91 as shown in FIG.
Can be easily sent to the next step without causing shape collapse due to reliable compression molding.

In the above embodiment, two lower dies 20 are provided in parallel. However, the number of lower dies 20 may be one, or two or more may be provided. In addition, the drive control of each type described above can be automatically performed by sequence control according to a predetermined program.

[0042]

As described above, according to the method for draining and forming a wet powder material according to the first aspect of the present invention, a filter is provided on each of the upper and lower mold surfaces, and the wet powder material is passed through each filter. Since the water is discharged out of the mold through the drain holes of the upper mold and the lower mold, the wet powder material can be efficiently dehydrated, and the molding efficiency can be improved. In addition, by providing a filter having a side facing the cavity space made of a polymer resin material having water permeability, a good dewatering function can be exhibited without causing clogging of each drain hole with a wet powder material. At the same time, it is possible to easily release the mold by maintaining the mold releasability from the wet-powder material, avoid complicated operations, and prevent impurities from being mixed in, thereby obtaining a high-quality molded product having a predetermined shape.

According to the method for draining and forming a wet powder material according to the second aspect of the present invention, the wet powder material is supplied into the cavity space, and then the upper mold and the frame mold are closed. Pausing compression of the wet powder material during the compression of the powder material by the upper and lower molds, opening the upper mold and the frame mold with a slight gap, and releasing the pressure remaining inside the cavity space Thus, since the wet powder material is finally compression-molded by the upper mold and the lower mold, scattering of the wet powder material due to residual pressure can be prevented, and a high-quality molded article having a predetermined shape can be obtained.

According to the method for draining and molding a wet powder material according to the third aspect of the present invention, the frame mold is lowered while the molded body of the wet powder material is held by the upper mold and the lower mold after the compression molding. After exposing the peripheral side of the molded body to the outside from between the upper mold and the lower mold,
By lifting the upper mold from the lower mold and removing and transferring the molded body of the wet powder material from the mold surface of the lower mold, the residual pressure can be reliably removed, and the molded body of the wet powder material can be immediately removed to form the molding process. And the continuous processing with the next step can be achieved.

According to the wet powder material draining and forming apparatus of the fourth aspect of the present invention, a filter means for draining the moisture of the wet powder material from the upper and lower mold surfaces, and a wet powder material The upper and lower molds each have a filter formed on the side facing the cavity space with a polymer resin material having water permeability, also serving as a releasing means for releasing the molded body from the upper and lower mold surfaces. Since it is provided on the mold surface, it can demonstrate the function of molding wet powder material together with a good dehydration mechanism. Obtainable.

According to the wet powder material draining apparatus according to the fifth aspect of the present invention, the drainage holes of the upper die and the lower die are provided with the same number, opening position and opening diameter forming condition. In addition, both the upper die and the lower die can exhibit a well-balanced and effective drainage function, and can efficiently perform the dehydration treatment of the wet powder material, and can significantly improve the molding efficiency.

According to the wet powder material draining apparatus according to the sixth aspect of the present invention, the filter for the upper and lower dies is made of any one of polyethylene, polyester, nylon, aramid, acrylic, and polyvinyl chloride. By providing a filter having a side facing the cavity space made of a molecular resin material, a very good dehydration function can be exhibited, and good releasability from a molded body of a wet powder material can be provided.

According to the wet powder material draining and forming apparatus of the present invention, the polymer resin material on the side facing the cavity space as the upper and lower mold filters, the upper and lower molds By providing a laminated sheet with a metal mesh or nylon mesh on the side that is in contact with the mold surface, the mold releasability and use durability of the filter can be maintained, and the synergistic effect between the polymer resin material and the metal mesh or nylon mesh A more excellent drainage function can be exhibited.

According to the apparatus for draining and forming a wet powder material according to the eighth aspect of the present invention, a filter wound in a roll shape as a filter is fed out and provided on the upper die side so as to be able to be wound up. Exchange can be performed automatically and efficiently.

According to the apparatus for draining and forming a wet powder material according to the ninth aspect of the present invention, a filter is provided on the lower mold side as a filter which is wound around the mold side from the mold surface and is detachable with a holding ring. In addition, replacement can be performed more easily than with an adhesive, and peeling during use can be reliably prevented.

According to the wet powder material draining and forming apparatus according to the tenth aspect of the present invention, the frame mold and the lower mold are provided by interposing a water leak preventing means between the frame mold and the lower mold. The space between the mold and the mold can be maintained watertight, and the frame mold can be smoothly slidably assembled with the lower mold and supported.

According to the wet powder material draining and forming apparatus according to the eleventh aspect of the present invention, a packing made of any of Kepler fiber, Teflon fiber, graphite fiber and asbestos fiber is provided as a means for preventing water leakage. Therefore, the abrasion resistance of the packing can be improved, the use durability can be enhanced, and the frame mold can be assembled and supported so as to be able to slide smoothly with the lower mold.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a die structure equipped in a wet powder material drainage molding apparatus according to the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing a lower mold provided in the drainage molding apparatus of FIG.

FIG. 3 is an exploded perspective view showing a lower mold provided in the drainage molding device of FIG. 1;

FIG. 4 is a partially cutaway front view showing the drainage forming apparatus of FIG. 1;

FIG. 5 is a perspective view showing a body part in the drainage molding apparatus of FIG. 1;

FIG. 6 is a cutaway side view showing the drainage forming apparatus of FIG. 1;

FIG. 7 is a plan view showing a body part in the drainage molding apparatus of FIG. 1;

FIG. 8 is a side view showing the drainage molding apparatus of FIG. 1 cut away at a different portion from FIG. 6;

FIG. 9 is an explanatory view showing a compressed state of a wet powder material in the drainage molding apparatus of FIG. 1;

FIG. 10 is an explanatory view showing a state where residual pressure is removed in the water drainage molding apparatus of FIG. 1;

FIG. 11 is an explanatory view showing a mold separation state before final mold opening in the drainage molding apparatus of FIG. 1;

FIG. 12 is an explanatory view showing a final mold opening state in the drainage molding apparatus of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Frame type 20 Lower type 21 ... Drain hole 30 Upper die 31 ... Drain hole 40 Water leakage prevention means 41 Packing 50, 60 Filter 50a Polymer resin material of filter W Slurry wet powder material S Cavity space

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI // B22F 3/22 B22F 3/22

Claims (11)

[Claims] 1. A cavity is formed by a cylindrical frame, a lower die slidably fitted in the frame, and an upper die for closing an open end of the frame. While compressing the slurry wet powder material supplied inside with the upper mold and the lower mold, the water in the wet powder material is discharged out of the mold through the drain holes communicating from the upper and lower mold surfaces. In addition, in a method of draining and molding a wet powder material from a wet powder material, a molded body having a predetermined shape is compression-molded, wherein a filter formed on a side facing a cavity space with a polymer resin material having water permeability is formed in an upper mold and a lower mold. The wet powder material is discharged from the upper and lower mold drain holes to the outside of the mold through the polymer resin material of each filter provided on each mold surface of the mold, and the molded body of the wet powder material is removed from the filter. Separate the upper and lower mold surfaces with each polymer resin material Drainage molding method of a wet powder material is characterized in that so as to. 2. An upper mold and a frame mold are closed after supplying the wet powder material into the cavity space, and the wet powder material is compressed while the wet powder material is compressed by the upper mold and the lower mold. Pause compression and open the upper mold and frame mold with a slight gap,
2. The method for draining and forming a wet powder material according to claim 1, wherein after the pressure remaining in the cavity space is released, the wet powder material is finally compression-molded by the upper mold and the lower mold. 3. The compression molding of the wet-powder compact is held down by the upper mold and the lower mold, and the frame mold is lowered to bring the peripheral side surface of the compact to the outside from between the upper mold and the lower mold. The water of the wet powder material according to claim 1 or 2, wherein after the exposure, the upper mold is raised from the lower mold to take out and transfer the molded body of the wet powder material from the mold surface of the lower mold. Punching method. 4. A cavity is formed by a cylindrical frame mold, a lower mold slidably fitted in the frame mold, and an upper mold for closing an open end of the frame mold. While compressing the slurry wet powder material supplied inside with the upper mold and the lower mold, the water in the wet powder material is discharged out of the mold through the drain holes communicating from the upper and lower mold surfaces. A wet-powder draining apparatus for compression-molding a molded body having a predetermined shape from the wet-powder material; a filtering means for draining the moisture of the wet powder material from each of the upper and lower mold surfaces; The upper and lower dies are formed of a filter having a side facing the cavity space made of a water-permeable polymer resin material, also serving as a releasing means for releasing the molded body of the powder material from the upper and lower mold surfaces. Draining of wet-type powder material provided on each mold surface Form apparatus. 5. The apparatus for draining and forming a wet powder material according to claim 4, wherein the drain holes of the upper die and the lower die are provided with the same number, opening position and opening diameter forming condition. . 6. A filter having a side facing a cavity space made of a polymer resin material of any one of polyethylene, polyester, nylon, aramid, acrylic and polyvinyl chloride is provided as the upper and lower filters. The apparatus for draining and forming a wet powder material according to claim 4 or 5, wherein: 7. A laminated sheet of a polymer resin material on the side facing the cavity space as a filter for the upper and lower dies, and a metal mesh or a nylon mesh on the side in contact with each mold surface of the upper and lower dies. The apparatus for draining and forming a wet powder material according to any one of claims 4 to 6, further comprising: 8. The wet powder material draining device according to claim 4, wherein a filter wound in a roll shape is fed out as the filter, and the filter is provided on the upper die side so as to be able to be wound up. Molding equipment. 9. The wet powder material according to claim 4, wherein a filter which is wound around the mold side from the mold surface and is detachable with a holding ring is provided on the lower mold side as the filter. Drainage molding equipment. 10. The apparatus for draining and forming a wet powder material according to claim 4, further comprising a water leakage preventing means interposed between the frame mold and the lower mold. 11. The drainage molding of a wet powder material according to claim 10, wherein a packing made of any of Kepler fiber, Teflon fiber, graphite fiber and asbestos fiber is provided as said water leakage preventing means. apparatus.