JPH01156008A - Press molding device - Google Patents

Abstract

PURPOSE:To miniaturize and lighten the whole of a press molding device and simplifies its maintenance and inspection, by forming a housing of a pressing device with a holding case. CONSTITUTION:A power fluid (such as oil) 30 fed through a power fluid feed device is introduced into a fluid introducing space 26 formed between an external circumferen tial surface 13a of a tightening cylinder 13 and the inner circumferential surface of a holding case 12 through fluid feed ports 24, 25 of the holding case 12. When pressure of the power fluid 30 is raised according to an increase of a supply quantity of the power fluid 30, the diameter of the tightening cylinder 13 is contracted by pressing the external circumferential surface 13a of the tightening cylinder 13. External circum ferential surfaces 14c, 15c of pressurizing force transfer bodies 14, 15 are tightened according to this diametral contraction and pressurizing force is generated at respective free ends 14a, 15a. A top and bottom forces 16, 17 which have received the pressurizing force receive pressure of the power fluid 30 which has raised pressure and press mold ing of raw materials, which has been filled into a filling space A of the raw materials, is performed with pressurization stress. As the holding case 12 serves as a housing of a pressurizing device, the whole of pressure molding device can be miniaturized and lightened.

Description

[Detailed description of the invention] [Industrial application field]

The present invention includes a set of two molds that can be moved into and out of contact with each other so that the mold surfaces surround the raw material filling space when they come into contact with each other, and the raw material that has been filled in the raw material filling space is press-molded by both molds. This invention relates to a pressure molding device, and relates to an improvement in a pressure means for pressurizing a mold. The raw materials used include slurry, clay, and powder containing a binder.

[Conventional technology]

Conventionally, a pressure molding apparatus 1 includes a fixed lower mold 2 and an upper mold 3 disposed so as to be separable from the lower mold 2, as shown in FIG.
and a frame 4 that can be raised and lowered to form a raw material filling space A surrounded by mold surfaces 2a and 3a between the lower mold 2 and upper mold 3 that are close to each other.
, a pressurizing means 5 consisting of a hydraulic cylinder that raises and lowers the upper die 3, and rigid support columns 6, 6, which connect the pressurizing means 5 and the lower die 3. The pressure molding device 1 includes a cylinder 5 constituting a pressure means 5.
Pressurized oil is supplied into the space A to lower the piston 5b, and the output of the piston rod 5C is transmitted to the upper die 3 to pressure-form the raw material S that has been supplied to the raw material filling space A.

[Problems to be solved by the invention]

However, the conventional pressure molding apparatus 1 has the following problems. (a) Since the rigid pressurizing means 5 is arranged above the upper die 3, the height of the entire apparatus becomes taller. Therefore, it is necessary to raise the ceiling of the factory where the molding device is installed, which increases the factory installation cost, and makes maintenance and inspection of the pressurizing means difficult, resulting in a decrease in production efficiency. +1)) In recent years, with the progress of raw material molding, there is a tendency for molding pressure stress and molding area to increase. In order to cope with this tendency, it is necessary to increase the size of the rigid pressurizing means 5 and to increase the thickness of the rigid support column 6. However, increasing the size of the pressurizing means 5 and the diameter of the support column 6 means that the overall f.
Lit increases, resulting in an increase in installation costs due to reinforcement of equipment @ foundations and a decrease in production efficiency due to difficulty in maintenance and inspection.

Purpose of the Invention 1 In view of the above-mentioned problems, the present invention aims to provide a pressure molding device that is capable of molding a large area under high molding pressure stress without increasing the size of the molding device as a whole. do. [Means for Solving the Problems] The gist of the present invention is to provide two molds that are arranged so as to be separable so that their mold surfaces surround a raw material filling space when they come into contact with each other, and a pressurizer that pressurizes the molds. In the pressure molding apparatus, the pressure forming device includes a hollow rigid holding case and a columnar shape made of a flexible elastic material, and the pressurizing means is formed into a columnar shape made of a flexible elastic material, and the pressurizing means includes a hollow rigid holding case and a columnar shape made of a flexible elastic material. a pressurizing force transmitting body which is arranged so that the holding case holds the fixed end and presses one of the molds with its free end; The fastener is disposed between the pressurized fluid guide surface and the outer circumferential surface of the pressurized force transmitting body, and is made of a flexible elastic material with the outer circumferential surface serving as the pressurized fluid guide surface.

[For use]

When pressurized fluid is supplied from the pressurized fluid supply port between the outer circumferential surface of the cylinder and the inner circumferential surface of the holding case, the outer circumferential surface of the cylinder is compressed and compressed in the centripetal direction. diameter. The pressurizing force transmitting body is tightened at its outer peripheral surface as the diameter of the cylindrical body is reduced, and a pressurizing force is generated at the free end. The mold that receives this pressure presses and molds the raw material that has been filled into the raw material filling space.

[Explanation of Examples]

Next, a pressure molding apparatus according to the present invention (hereinafter referred to as "the present invention apparatus") will be described based on an embodiment shown in the drawings. (First Embodiment) FIGS. 1 to 5 show an apparatus 11 of the present invention according to a first embodiment. The device 11 of the present invention includes a holding case 12 which is a hollow rigid body, a cylindrical body 13 fitted in a recessed part of the holding case 12, and upper and lower parts fitted in the cylindrical body 13 for tightening. Pressure transmitting body 14.15 and pressing force transmitting body 14.15
upper and lower molds 16. which abut against the free ends 14a, 15a of the upper and lower molds 16.
17, and a distant ring 18 placed on the lower mold 11. The holding case 11 includes a cylindrical base 19, holders 20 and 21 screwed to the upper and lower ends of the base 19, a plug 22 screwed to the upper holder 20, and a lower holder 21. It consists of a support plate 23 inserted into the through hole 21a. The cylindrical base 19 has an inner circumferential surface 19a serving as a pressurized fluid guide surface, and a pressurized fluid supply port 24 near the upper and lower ends of the inner circumferential surface 19a.
25 is open. An appropriate number of sets of connectors 28 are arranged between the base 19 and the support plate 23. The tightening cylinder 13 is made of a flexible elastic material (eg, neoprene rubber, urethane resin, etc.), and its upper and lower ends are held in a watertight state by the holders 20 and 21. The tightening cylinder 13 has an outer circumferential surface 13a serving as a pressurized fluid guide surface, and forms a fluid introduction space 26 between it and the inner circumferential surface 19a of the cylindrical base 19. For tightening, the cylindrical body 13 is fitted with a protective cylinder 27 made of a flexible elastic material on the inner circumferential surface 13b, if necessary. The pressing force transmitting body 14.15 is a columnar body made of a flexible elastic material (for example, neoprene rubber, urethane resin, etc.), and has a hardness of JIs rubber hardness of 40.
The angle is appropriately selected within the range of ~90 degrees. The upper pressurizing force transmitting body 14 has an upper fixed end 14b in contact with the plug 22, and a lower free end 14a.
The upper die 16 is brought into contact with the upper die 16. The lower fixed end 15b of the lower pressing force transmitting body 15 is in contact with the upper surface of the support plate 23, and the lower die 16 is in contact with the upper free end 15a. The upper and lower molds 16 and 17 are formed from elastic materials such as rubber, synthetic resin, or metal into appropriately thick plate shapes, and have mold surfaces 16a.
, 17a have an arbitrary shape corresponding to the surface shape of the object to be molded. The distant ring 18 placed on the lower die 17 is made of a flexible elastic material, and fills the raw material filling space A.
It forms the outer periphery of. Note that this destand ring 18 is placed as necessary, and although not shown in the drawings, if a recessed portion forming the raw material filling space A is provided in the mold surface 17a of the lower mold 17. may not be necessary. Furthermore, in this embodiment, the pressurizing force transmitting body 14 (15) and the mold 16 (17) are formed separately, but the present invention is not limited to this in any way. Transmission body 14 (15)
Of course, it is also possible to form the mold 1G (17) integrally. Next, the operation of the device 11 of the present invention will be explained based on its usage. First, as shown in FIG. 3, the holding case 12 is constructed by separating the cylindrical base 19 and the support plate 23, and then forming the upper and lower molds 16.
17 to defect. A raw material filling space A formed on one side 17a of the lower mold 17 is filled with a raw material S using a raw material filling tool 29 for filling raw materials such as ceramic powder. After filling the raw material S, insert the distant ring 18. into the protective cylinder 27. Lower mold 17. Pressure force transmitting body 15
and the upper part of the support plate 23 is inserted, and the distant ring 1
8 is held between upper and lower molds 16 and 17. Thereafter, as shown in FIG. 1, the cylindrical base 19 and support plate 23 of the holding case 12 are connected by a connecting tool 28. Next, a pressurized fluid 30 (for example, oil, glycerin, water resistant or air, etc.) supplied from a pressurized fluid supply device (not shown) is passed through the fluid supply port 24.25 of the holding case 12. The fluid is introduced into the fluid introduction space 26. When the pressure of the pressurized fluid 30 increases as the supply amount increases, as shown in FIG. 4, the pressurized fluid 30 presses the outer circumferential surface 13a of the cylindrical body 13 to reduce its diameter. The pressurizing force transmitting body 14.15 is tightened by tightening the outer circumferential surfaces 14c and 15c as the diameter of the cylindrical body 13 decreases, and the free ends 14a and 15c, respectively, are tightened.
A pressurizing force is generated at 15a. The upper and lower molds 16 and 17 that have received this pressurizing force pressurize the pressurized fluid 30 at a pressure P1 (
For example, 500 to 5,000 kq/c+7) is applied to pressurize the raw material S filled into the raw material filling space A under stress P.
Pressure mold in step 2. Between Ps and P2, for example, the cylindrical body 13 and the pressurizing force transmitting body 14, 15 have Poisson's ratio ν.
When , the following relational expression holds true. P2=P1(1-ν)/ν When the cylindrical body 13 and pressure transmitting body 14.15 are made of rubber, Poisson's ratio ν is approximately 0.5, so the tightening becomes P2-Pt. . After the predetermined pressurization time has elapsed, the pressurized fluid 30 supplied into the fluid introduction space 26 is transferred to the pressurized fluid supply port 24.
．． 25 to the outside and the pressure is reduced. The cylindrical body 13 and the pressure transmitting body 14, 15, which had been deformed under pressure, are
As shown in the figure, as the pressure of the pressurized fluid 30 is reduced, the elastic return occurs automatically. At its best, the base 19 of the holding case 12 and the support plate 23 are separated, the upper and lower molds 16° 17 are separated, and the molded product 31 is obtained on the mold surface 17a of the lower mold 17. Note that when the detent ring 18 molded from an elastic material is compressed by the upper and lower molds 16 and 17, the inner circumferential surface 18
a is reduced in diameter, and conversely, as shown in Fig. 5, the upper and lower molds 16.1
When the clamping pressure 7 is released, the diameter is expanded to facilitate demolding of the molded product 31. (Second Embodiment) FIGS. 6 to 10 show an apparatus 41 of the present invention according to a second embodiment. The device 41 of the present invention is a raw nS filled in a raw material filling space A.
As shown in FIGS. 7 and 8, by increasing the initial pressure sequentially from the central area of the raw material filling space A toward the peripheral edge, forming obstacles contained in the raw material S can be removed. (For example, air if the raw material is powder, or water if the raw material is kneaded clay) is squeezed to the periphery of the raw material filling space A to completely eliminate obstacles and make it possible to pressure mold large-diameter molded products. This is how it was done. The present invention device 41 differs from the present invention device 11 of the first embodiment in that the cylindrical body 43 is tightened. As shown in Fig. 6, the tightening cylinder 43 is made of a flexible elastic material (for example, neoprene rubber, urethane resin, etc.), and its hardness is JIS rubber hardness of 40 to 90 degrees. be selected as appropriate within the range. The tightening is performed on the outer peripheral surface 43a of the cylindrical body 43 at appropriate pitches P (for example, P-1) along the longitudinal direction of the outer peripheral surface.
Pressure areas 43a-1, 43a- are divided into 5 areas with annular grooves 43c, 43c... (0 to 100mm).
2..., 43a-5 are formed. Among these pressure areas, the upper and lower pressure areas 43a-1 and 43a-5 are as follows:
This is considered to be the initial pressurization area. Annular groove 43c, 43C
Each of... has an elastic seal ring 44, 44...
are fitted in a tight fit. Furthermore, the tightening is performed using annular grooves 43d near the upper and lower ends of the outer circumferential surface 43a of the cylindrical body 43.
, 43d are recessed, and the annular grooves 43d, 4
An elastic seal ring 45.45 is fitted to 3d. The elastic sealing ring 45.45 has its inner peripheral surface connected to the base 19.
It is brought into close contact with the inner circumferential surface 19a of. The elastic seal rings 44, 45 are not limited to an O-shaped cross section;
Although not shown, it is of course possible to select a cross section having an appropriate shape such as a V-shape or an X-shape. The inner peripheral surface 19a of the cylindrical base 19 constituting the holding case 12 serves as a pressurized fluid guide surface that comes into close contact with each of the elastic seal rings 44, 44, and so on. ,
The tightening is performed in the initial pressurized areas 43a-1 and 43a of the cylinder 43.
-5 and the part facing the central pressurizing area 43a-3,
Pressurized fluid supply ports 24, 25, and 46 are open. In addition, the number of divisions of the pressurizing area formed on the outer circumferential surface 43a of the cylindrical body 43 is not limited to five divisions as in the illustrated embodiment; The pressure transmitting body 14 (15) may be divided into two or more. A pressurized fluid supply and discharge device 50 that supplies and discharges a pressurized fluid 30 made of oil to and from the device 41 of the present invention will be described. The initial pressurization pump 51 and the booth pump 52 have suction ports 51a and 52a facing the oil tank 53. The discharge port 51b of the initial pressurization pump 51 is connected to the pressurized fluid supply port 24.2 via the check valve 54 and the solenoid valve 55.55.
5 is connected to the piping. A pressure switch 56 and a relief valve 57 are connected between the discharge port 51b of the initial pressurization pump 51 and the check valve 54. A discharge port 52 b of the booth pump 52 is connected to an inlet 58 a of the boost cylinder 58 and a relief valve 60 . The discharge port 58b of the boost cylinder 58 is connected to the solenoid valve 5 via the check valve 61.
5.55 is connected to the piping. A pressure switch 62 is connected between the discharge port 58b of the boost cylinder 58 and the check valve 61. The operation circuit 63 that starts and stops the initial pressurization pump 51 and the booth pump 52 starts only the initial pressurization pump 51 until the initial pressure setting pressure switch 56 outputs a set pressure detection signal, and then When receiving the set pressure detection signal to be output, the initial pressurization pump 5
At the same time, the booth pump 52 is started. Further, the operation circuit 63 starts the booth pump 52 until the pressure switch 62 for pressure setting outputs a setting detection signal, and when the pressure switch 62 receives the setting pressure detection signal, the booth pump 52 starts. to stop. A drain pipe 63 leading to the oil tank 53 is connected to the pressurized fluid outlet 24 through a solenoid valve 64, 65, 66.
Connected to 25.46. In the oil tank 53,
A liquid level detection switch 67 is arranged. Next, the operation of the device 41 of the present invention in the second embodiment will be explained together with the operation of the pressurized fluid supply/discharge bag a50. First, as shown in FIG. 6, the raw material S filled in the raw material filling space A is sandwiched between upper and lower molds 16 and 17. Pressurized fluid drainage device 5
0 are solenoid valves 64 and 65 for drains. At the same time as closing 66, solenoid valve 55°5 for oil supply
Open 5. The initial pressurization pump 51 is activated by the output signal of the operation circuit 63 and supplies the pressurized fluid 30 to the pressurized fluid supply ports 24 and 25. When the pressurized fluid 30 reaches a predetermined pressure (for example, 50 to 200 kg/cj), it flows out from the pressurized fluid supply port 24.25 toward the cylindrical body 43, and the tightening occurs when the cylindrical body 43 is initially applied. It enters between the pressure areas 43a-1, 43a-5 and the inner circumferential surface 19a of the base 19. Initial pressure area 4
The pressurized fluid 30 that has flowed out to 3a-1 and 43a-5 is
As shown in the figure, initial pressure area 43a-1 (43a-5)
and the adjacent pressurizing area 43a-2 (43a-4) are each partitioned by an elastic seal ring 44, so only the initial pressurizing areas 43a-1 and 43a-5 are pressed and the initial pressurizing area 43a- 1, reduce the diameter of 43a-5. The upper and lower pressurizing force transmitting bodies 14 (15) are tightened on the outer peripheral surface 14 of the area facing the initial pressurizing area 43a-1 (43a-5) of the cylindrical body 43.
Since only C (150) is tightened, the free end 14a
The central region of the mold 16 (15a) is expanded toward the raw material filling space A, and the central region of the mold 16 (17) is strongly pressurized. The upper and lower molds 16 and 17, whose central regions are strongly pressurized, particularly strongly press the raw material S filled in the central region of the raw material filling space A. The forming obstacles (not shown) in the raw material S rapidly flow out into the discharge path formed by the large particle gaps in the unpressurized raw material because the pressure against the forming obstacles increases, and the pressurized The raw material S will not remain in a compressed state. During tightening, the diameter of the initially pressurized regions 43a-1 and 43a-5 of the cylindrical body 43 increases as the supply amount of the pressurized fluid 3o increases. The tightening is performed in the initial pressurized area 43a-1 (43
Pressure area 43a-2 (43a-4) adjacent to a-5)
As shown in FIG. 8, a portion of the annular groove 43b (43b) formed between the two deforms inward and reduces in diameter. The elastic seal rings 44.44 are tightly fitted into the annular grooves 43b, 43b.
As the diameter of b decreases, the outer diameter of the ring decreases, and a gap is formed between the ring and the inner circumferential surface 19a of the base 19, and the sealing function is lost. The pressurized fluid 30 is tightened in the pressurized areas 43a-1 and 438-5 adjacent to the initial pressurized areas 43a-1 and 438-5 of the cylinder 43 due to the loss of the sealing function of the elastic seal rings 44.44.
2,43a-4, and this pressurized area 43a-2,4
Press 3a-4. Upper and lower pressing force transmitting bodies 14 (15
), the tightening is done in the pressure area ti43a-2 (43a
-4) The area of the outer circumferential surface 14c (150) facing the area is tightened. As the free end 14a (15a
) is expanded in the radial direction from the central area, and the pressurizing area for the mold 16 (17) is expanded in the radial direction from the central area. The upper and lower molds 16 and 17 sequentially press the raw material S filled in the raw material filling space A as the pressurized area expands so that ripples spread in the radial direction from the central area. By this sequential pressurization, the forming obstacles in the raw material S are squeezed to the peripheral portion in the raw material filling space A where they do not interfere with forming. The discharge pressure of the initial pressurization pump 51 increases when the initial pressurization of the entire raw material S is completed. As the discharge pressure increases, the pressure switch 56 outputs a set pressure detection signal to the operating circuit 63 to stop the initial pressurization pump 51 and start the booth pump 52. The booth pump 52 has high pressure (for example, 500 to 5,000 kg/d
r ) is supplied between the outer circumferential surface 43a of the body 43 and the inner circumferential surface 19a of the base 19 with tightening<t m, and as shown in FIG. The entire area of the fluid pressure receiving area is reduced in diameter. Upper and lower pressing force transmitters 14.15
The tightening is performed by reducing the diameter of the entire cylindrical body 43 on the outer circumferential surface 14c,
The entire part of 15c is tightened evenly, and the upper and lower molds 16.17
Apply pressure evenly. The entire raw material S is pressure-molded by applying equal pressure 16.17 times above and below. The pressure switch 62 shown in FIG.
When the pressure reaches a predetermined pressure, the set pressure detection signal is sent to the operating circuit 5.
3 to stop the booth pump 52. When a predetermined high pressure vI period has elapsed, the solenoid pulp 55 is closed and the drain solenoid pulps 64, 65, 66 are opened. Tightening is done on the outer peripheral surface 43 of the cylindrical body 43.
pressurized fluid 30 between a and the inner circumferential surface 19a of the base 19
Due to the elastic return of the pressurizing force transmitting body 14, 15 and the tightening cylinder 43 (see FIG. 10), it passes through the drain pipe 63 and returns into the oil tank 53. A liquid level detection switch 67 arranged in the oil tank 53 detects that the pressurized fluid 30 has returned to a predetermined outlet. If detected, the base 19 of the holding case 12 and the support plate 23 are separated, the upper and lower molds 16 and 17 are separated, and the molded product 31 (see FIG. 10) is placed on the mold surface 17a of the lower mold 17. obtain. (Third Embodiment) FIG. 11 shows an apparatus 71 of the present invention according to a third embodiment. Similar to the inventive device 41 of the second embodiment, the present invention device 71 eliminates obstacles by squeezing forming obstacles contained in the raw material S to a peripheral portion of the raw material filling space A that does not interfere with forming. This makes it possible to pressurize large-diameter molded products. The difference between the device 71 of the present invention and the device 11 of the present invention of the first embodiment is that the cylindrical body 73 is tightened. Tightening the cylindrical body 73 is
It is formed from a flexible material (for example, neoprene rubber, urethane resin, etc.) and covers the core material layer 74 @7
5. The core material layer 14 is formed by separately forming ring materials 74a, 74b, 741 having an appropriate length (for example, -10 to 100 mm) arranged in a line with their respective end surfaces in contact with each other. It is something. Each ring material 74a, 74b...74i is an upper and lower ring material 74a. The elastic modulus increases stepwise from 74i toward the center ring member 74e. - To obtain the desired elastic modulus, ring materials 74a, 74
b...Rubber hardness of 741 (for example, JIS rubber hardness 4
This is generally done by selecting an appropriate angle (0 to 90 degrees). For tightening, the outer circumferential surface 73a of the cylindrical body 73 is divided into nine pressure areas 73-1.73-2...-73-9, and the upper and lower pressure areas 73-1.73-9 are initialized. It is a pressurized area. The base 19 that constitutes the holding case 12 is
Tightening is done by tightening the inner circumferential surface 1 that is in close contact with the outer circumferential surface 43a of the cylinder 43.
9a is formed as a pressurized fluid guide surface. Inner peripheral surface 1
9a, the tightening is performed in the initial pressurized area 73-1 of the cylinder 73.
．． Pressurized fluid supply ports 24 and 25 are located opposite to 73-9.
In addition, a pressurized fluid outlet 46 is opened at a portion facing the central pressurizing area 73-5. Note that the number of divisions of the pressurizing area formed in the cylinder body 73 is not limited to nine divisions as in the illustrated embodiment; body 1
4 (15), as long as it is divided into two or more. Next, the operation of the device 71 of the present invention in the third embodiment will be explained. First, the raw material filling space A is filled with the raw material 14, which is sandwiched between the upper and lower molds 16 and 17. Pressurized fluid 30 is supplied to pressurized fluid supply ports 24 and 25 from a pressurized fluid supply and discharge device (not shown). The pressurized fluid 30 has a predetermined pressure (for example, 50 to 20
0 ki/ci), the tightening flows out from the pressurized fluid supply port 24.25 toward the cylinder 73, and the tightening is applied to the initial pressurized area 73-1.73-9 of the cylinder 73 and the base 19. Inner peripheral surface 19
It goes between a. The pressurized fluid 30 that has flowed out into the initial pressurization area 73-1.73-9 is transferred to the initial pressurization area 73-1.73-
Only 9 is reduced in diameter. The reason is that the initial pressure area 73-
This is because the initial pressure region 73-1.73-9 is easily deformed because the elastic modulus of 1.73-9 is smaller than that of the adjacent pressure regions 73-2 and 73-8. . The upper and lower pressurizing force transmitting bodies 14 (15) are tightened only on the outer peripheral surface 14a (15a) of the area facing the initial pressurizing area 731 (73-9) of the cylindrical body 13.
The central region of the free end portion 14a (15a) is expanded toward the raw material filling space A, and the central region of the mold 16 (17) is strongly pressurized. Upper and lower molds 16 whose central areas are strongly pressurized
．． 17 applies particularly strong pressure to the raw material S filled near the center of the raw material filling space A. Molding obstacles (not shown) in the raw material S rapidly flow out to the discharge path formed by large particle gaps in the unpressurized raw material as the pressure against the obstacles increases, and It does not remain in a compressed state in the raw material S. During tightening, as the supply pressure of the pressurized fluid 30 increases, the cylinder body 73 applies pressure to the next pressurization area 73-2.73-8 adjacent to the initial pressurization area 73-1.73-9. The fluid 30 flows out and presses this next pressurized area 73-2, 73-8. Each pressurizing force transmitting body 14 (15) is tightened by tightening the outer peripheral surface 14C (15c) of the area facing the next pressurizing area 73-2 (73-8>) of the cylindrical body 73. As it expands, the free end 14a (15a)
expanding the bulging area from the central area in the radial direction,
The pressurizing area for the mold 16 (17) is expanded in the radial direction from the central area. The upper and lower molds 16 and 17 expand the pressurizing area for the raw material S filled in the raw material filling space A by a constant annular width dimension in the radial direction from the central area as the pressurizing area expands. By this sequential pressurization, the forming obstacles in the raw material S are squeezed to the peripheral edge of the raw material filling space A, and do not remain in the raw material S in a compressed state □. Note that the pressure of the pressurized fluid 30 is higher than that in the case where only the initial pressurizing area 73-1.73-8 of the cylinder body 73 is pressurized.
The amount increases when 8 is pressurized. Due to the phenomenon of increasing pressure, the raw material S, which was initially pressurized in the central region of the upper and lower molds 16 and 17, is further pressurized. This phenomenon of increase in pressurizing force also discharges any forming obstacles remaining in the initially pressurized raw material S, thereby completing the elimination of the obstacles. When the supply pressure of the pressurized fluid 30 increases further, the pressurized fluid 30 is tightened in the pressurized area 73 on the outer peripheral surface 73a of the cylinder 73.
-3.73-4 and pressurized area 73-7.73-6 are sequentially pressurized in the same manner as above. The tightening is performed as the cylinder 73 is sequentially pressurized, and the raw material S filled in the raw material filling space A is moved from the area in the raw material filling space A facing the central area of the upper and lower molds 16 and 17 to the peripheral edge. Pressure is applied one after another as if ripples are spreading towards the area. Raw material S filled in raw material filling space 1
As the raw material S is sequentially pressurized, the molding obstacles present therein are squeezed toward the periphery of the raw material filling space A. When the initial pressurization of the entire raw material S is completed, the pressurized fluid 30 of high pressure (for example, 500~s, oo.cg/J) is tightened on the outer circumferential surface 43a of the cylinder 43 and the inner circumferential surface of the base 19. 19a,
The tightening reduces the diameter of the entire fluid pressure receiving area in the cylindrical body 13. The upper and lower pressing force transmitting bodies 14.14 are tightened by the cylindrical body 4.
Outer peripheral surface 14c (15c) due to diameter reduction in all areas of 3.
The entire body is evenly tightened, and the upper and lower molds 16 (17) are equally pressurized. The entire raw material S is pressure-molded by applying equal pressure from the upper and lower molds 16 and 17. When a predetermined high pressure pressurization time has elapsed, the pressurized fluid 30 is discharged, and the pressurized force transmitting body 14, 15 and the tightened cylinder 73 elastically return to their original shapes. Finally, the base 19 of the holding case 12 and the support plate 23 are separated, the upper and lower molds 16 and 17 are separated, and a molded product is obtained on the mold surface 17a of the lower mold 17. (Fourth Embodiment) FIG. 12 shows an apparatus 81 of the present invention according to a fourth embodiment. The present invention device 81 is the present invention device 1 of the first embodiment.
1 (see Figure 1) is that the pressurizing force transmitting body 1
4 is disposed above, and the upper surface of the support plate 23 is used as a lower mold. (Other Examples) In the device 71 of the present invention in the third embodiment, the tightening with a changed elastic modulus is applied to the outer periphery of the cylinder 73. Although not shown in the drawings, the tightening in the first embodiment is similar to that of the cylinder 43. It goes without saying that the device of the present invention may be constructed by forming annular grooves at appropriate pitches, fitting the elastic seal ring 44 into the annular groove, and bringing the elastic seal ring 44 into close contact with the inner circumferential surface of the base 19. It is possible. Furthermore, as a separate embodiment, although not shown, the second
Example of the device of the present invention 41 and water source cleavage of the third example @7
Of course, it is also possible to use the upper surface of the support plate 27 as the lower mold, as shown in the fourth embodiment (see FIG. 12), without providing the lower pressurizing force transmitting body 15 and the lower mold 17 in Embodiment 1.

[Effects of Kien p1] As detailed above, the device of the present invention has the following excellent effects. - Since the pressurizing means is placed inside the holding case, the height of the entire device can be made much shorter than in the past. As a result, it is possible to lower the ceiling of the factory where the molding equipment is installed, reducing factory installation costs, and making maintenance and inspection of the entire equipment easier, improving production efficiency. ■ Holding case Since it also serves as the housing for the pressurizing means, it is possible to reduce the size and size of the entire device.As a result, installation costs can be reduced as a strong installation foundation is not required, and maintenance and inspection costs can be reduced. This simplifies the process, and together with the effect (2) above, it is possible to dramatically improve production efficiency.

[Brief explanation of the drawing]

1 to 6 show a first embodiment of the device of the present invention, in which FIG. 1 is a longitudinal sectional view, and FIG. 2 is an I-I in FIG. 1.
Figure 3 is a vertical cross-sectional view showing the state in which the raw material is filled in the raw material filling space, Figure 4 is a vertical cross-sectional view showing the initial pressurized state, and Figure 5 is the pressure forming. FIG. 6 is a vertical cross-sectional view showing the state in which the pressurized fluid has been removed, and FIG. Fig. 7 is a longitudinal cross-sectional view showing the first stage of the initial pressurized state, Fig. 8 is a longitudinal cross-sectional view showing the second stage of the initial pressurized state, and Fig. 9 is a high-pressure pressurized state. Fig. 10 is a longitudinal sectional view showing the state in which the pressurized fluid is removed after pressure forming, Fig. 11 is a longitudinal sectional view showing the third embodiment of the device of the present invention, and Fig. 12 is a longitudinal sectional view showing the state in which the pressurized fluid is removed after pressure forming. A longitudinal sectional view showing a fourth embodiment of the apparatus of the present invention, and FIG. 13 is a partial longitudinal sectional view showing the entire conventional pressure molding apparatus. A... Raw material filling space 12... Holding case 13
(43, 73)... Tightening is performed on cylinder 14 (15)... Pressurized force transmitting body 16 (, 17)... Mold 24 (25)... Pressurized fluid supply port Fig. 3 Fig. 10 figure

Claims (1)

[Claims] 1. A pressurizer comprising two molds that are separably arranged so that their mold surfaces surround a raw material filling space when they come into contact with each other, and a pressurizing means that pressurizes the molds. In the molding device, the pressurizing means includes a hollowed-out rigid holding case and a column-shaped member made of a flexible elastic material, and is disposed within the recess of the holding case, and has a fixed end attached to the holding case. a pressurizing force transmitting body that holds the part and presses one of the molds with its free end; and a pressurizing fluid guide surface formed on the inner circumferential surface of the recess of the holding case and having a pressurized fluid supply port opening, and a pressurizing force transmitting body. 1. A pressure molding device comprising: a tightening cylinder made of a flexible elastic material, disposed between the outer peripheral surface of the body and the outer peripheral surface serving as a pressurized fluid guide surface. 2. The pressure molding apparatus according to claim 1, wherein the pressure means is provided in one or both of the molds. 3. A distant ring made of a flexible elastic material is arranged between the two molds so as to form an outer periphery of the raw material filling space. Pressure molding equipment. 4. The tightening cylindrical body gradually expands the tightening area on the outer circumferential surface of the pressurizing force transmitting body from an outer circumferential surface area far from the raw material filling space to an outer circumferential surface area close to the raw material filling space. A pressure molding apparatus according to claim 1, 2, or 3.