JPH0618718Y2 - Isotropic pressure press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an isotropic pressure press device that is well known as a CIP device (cold isostatic pressurizer) and the like.

(Prior Art) As this type of isotropic pressure pressurizing device, for example, the actual open Sho 61-10689
The one described in Japanese Patent Publication No. 7 is known (conventional example 1). Further, the one described in Japanese Utility Model Publication No. 61-49695 is known (conventional example 2).

This conventional one is one in which a high-pressure pressure medium is supplied to a pressurizing chamber in a container sealed by upper and lower lids to subject a molded object in the pressurizing chamber to isotropic pressure pressurization. There is a supply path for supplying a pressure medium to the pressure chamber and a discharge path for discharging the pressure medium from the pressure chamber on the upper lid side, and a gas for performing a cooling process in a high density state. A sealed check valve is provided.

Further, in the conventional example 2, the partition plate (precipitate removing tool) having the primary wiper and the secondary wiper is placed on the lower lid to prevent the intrusion of the deposit into the high pressure packing of the lower lid. is there.

(Problems to be Solved by the Invention) In the conventional example 1, foreign matter and the like adhering to the object to be molded settles and accumulates on the upper surface of the lower lid, but the discharge passage for the pressure medium is provided on the upper lid side. Therefore, there is little risk that the sediment will be sucked into the discharge passage, and therefore the pressure reducing valve and the like interposed in the discharge system will not be damaged.

However, the deposits deposited on the lower lid enter the high-pressure packing (the high-pressure packing is not shown in the above publication but is actually provided) interposed between the lower lid and the container. There was a risk of damaging the packing. Further, in the case of the conventional example 2, if the precipitate intrudes into the pressure equalizing chamber via the primary wiper and the secondary wiper, it is difficult to remove it.

Further, in both the conventional examples 1 and 2, there was a problem that the precipitate was easily stirred with the supply of the pressure medium.

Therefore, the present invention forms a pit for storing the precipitate in the lower lid to prevent the precipitate contained in this pit from being agitated by the supply of the pressure medium and to prevent damage to the high-pressure packing provided in the lower lid. The purpose is to ensure prevention.

(Means for Solving the Problems) According to the present invention, a high-pressure pressure medium is supplied to a pressurizing chamber in a container sealed by upper and lower lids, and an object to be molded in the pressurizing chamber is isotropically pressurized. An isotropic pressure press for pressure forming, in which a high-pressure packing is interposed in a fitting portion between a lower lid in which a pressure medium supply passage is formed and a container, and a pressure medium discharge passage is formed in the upper lid. A pit for deposits is formed on the lower lid to prevent backflow of the pressure medium from the pressurizing chamber at the fitting portion between the lower lid having a pressure higher than that of the high-pressure packing and the container. A backflow prevention packing which allows the reverse flow is provided, and an annular ring which is a part of the pressure medium supply path is connected between the high-pressure packing and the backflow prevention packing and communicates with the pressurizing chamber through the backflow prevention packing. A concave portion is formed, and the supply passage communicates only with the concave portion.

(Operation) According to the present invention, when the pressure medium is supplied to the supply path provided in the lower lid, the pressure medium enters the concave portion and then enters the pressurizing chamber through the backflow prevention packing. Then, the pressurizing chamber is maintained at a predetermined high pressure, and the object to be molded is subjected to isotropic pressure molding.
When the pressure molding is completed, the pressure medium in the pressure chamber is discharged from the discharge passage provided in the upper lid.

In the pressure molding, foreign matters attached to the molded body settle and deposit in the pits formed in the lower lid, but the supply passage is connected only to the recesses, so that stirring of the precipitates in the pits is prevented.

In addition, foreign matter is prevented from entering the recess by the backflow prevention packing, and therefore does not damage the high pressure packing.

Even if a precipitate intrudes into the concave portion, the concave portion is a part of the pressure medium supply passage, and the supply passage provided in the lower lid is communicated only with the concave portion. Since the flow returns to the pressurizing chamber, damage to the high pressure packing is prevented.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, the container 1 has a cylindrical shape, and an upper lid 2 and a lower lid 3 are detachably fitted to upper and lower open ends of the container 1, respectively, and a pressurizing chamber 4 hermetically sealed therein. Are formed. The upper and lower lids 2 and 3 are supported by a press frame 5 from above and below.

A pit 6 is recessed in the center of the upper surface of the lower lid 3, and the pit 6 is made of a perforated steel plate or the like.
Is covered with.

An annular recess 8 is formed in the outer periphery of the lower lid side where the lower lid 3 and the container 1 are fitted together. The recess 8 communicates with the pressure chamber 4. A pressing plate 9 is provided on the outer peripheral portion of the upper surface of the lower lid 3.
A backflow prevention packing 10 is provided over the entire circumference of the annular recess 8 so as to cover the annular recess 8. That is, the inner periphery of the backflow prevention packing 10 is fixed to the pressing plate 9, and the outer periphery of the packing 10 contacts the inner surface of the container to prevent the pressure medium from flowing from the pressurizing chamber 4 into the annular recess 8. In addition, the pressure medium is allowed to flow from the annular recess 8 into the pressure chamber 4.

A high-pressure packing 11 is provided below the annular recess 8 and an annular space is formed between the high-pressure packing 11 and the backflow prevention packing 10. The high-pressure packing 11 prevents the pressure medium in the pressurizing chamber 4 from leaking.

A pressure medium supply path 12 is formed in the lower lid 3. The supply path 12 has a first path 13 having one end opening to the outer peripheral portion of the lower portion of the lower lid 3 and the other end opening to the pit 6, and one end to the pit 6.
The second path 14 having the other end opened to the annular recess 8 between the backflow prevention packing 10 and the high pressure packing 11, and the second path 14 and the first path 13 via terminals 15 and 15. It is composed of a relay pipe line 16 to be connected.

An external pipe 17 is connected to the outer peripheral side end of the first passage 13, and a boost pump 18 is connected to the external pipe 17.

A discharge passage 19 for the pressure medium is formed in the upper lid 2.
One end of the discharge passage 19 is opened to the pressure chamber 4, and the other end is opened to the outer peripheral surface of the upper lid. A short pipe 20 is connected to the outer peripheral side end of the discharge passage 19, and a pressure reducing valve 21 is interposed in the short pipe 20.

A flexible hose 23 is connected to an end of the short pipe 20 via a connecting portion 22. The end of the flexible hose 23 is connected to the tank side.

Incidentally, reference numeral 24 shown in FIG. 2 indicates a precipitate.

According to the embodiment having the above-described configuration, the high-pressure pressure medium supplied from the booster pump 18 to the supply passage 12 through the external pipe 17 is:
Without touching the precipitate 24 at all by the relay pipe line 16,
Also, it is supplied to the annular recess 8 without being disturbed,
The backflow prevention packing 10 is pushed open and supplied into the pressurizing chamber 4.

During the pressure treatment, the discharge passage 21 is closed, the pressure chamber 4 is maintained at a high pressure, and the body to be molded therein is pressure-molded. At this time, the foreign matter adhering to the molded body falls off and deposits in the pit 6 as a precipitate 24. The foreign matter tries to enter the annular recess 8, but the backflow prevention packing 10 prevents the foreign matter from entering. In addition, the foreign matter that has intruded should be returned to the pressurizing chamber 4 by the flow from the supply passage 12 when the pressure medium is supplied, so that the high pressure packing 11 is prevented from being damaged.

(Effects of the Invention) As described in detail above, according to the present invention, the following operational effects are obtained.

The backflow prevention packing itself prevents the precipitate from entering the recess, and the backflow prevention packing controls the flow of the pressure medium in the upward direction, further preventing the precipitation from entering the recess. Therefore, the high-pressure packing can be completely prevented from being damaged by the precipitate.

When the pressure medium flows upward from the recess through the backflow prevention packing, deposits are prevented from accumulating in the vicinity of the backflow prevention packing in contact with the inner surface of the high pressure vessel, and the inner surface of the high pressure vessel is damaged by the precipitate. It can be prevented from being received or corroded.

Since the pressure medium is supplied only to the concave portion and is supplied to the pressurizing chamber through the backflow prevention packing, the precipitate accumulated in the pit formed on the lower lid is not disturbed, and therefore the floating precipitate is not generated. It is possible to avoid falling onto the backflow prevention packing.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of the lower lid supply passage. 1 ... container, 2 ... upper lid, 3 ... lower lid, 4 ... pressurizing chamber,
8 ... Annular recess, 10 ... Backflow prevention packing, 11 ...
High pressure packing, 12 ... Supply path, 19 ... Discharge path.

Claims (1)

[Scope of utility model registration request] 1. An isotropic pressure press for supplying a high-pressure pressure medium to a pressure chamber in a container sealed by upper and lower lids to form a molded object in the pressure chamber under isotropic pressure. In the device, a high-pressure packing is interposed in the fitting portion between the lower lid in which the pressure medium supply passage is formed and the container, and the pressure medium discharge passage is formed in the upper lid. A pit is formed for the precipitate, and at the fitting portion between the lower lid and the container, which is higher than the high-pressure packing, the pressure medium backflow from the pressure chamber is prevented, but the reverse flow is allowed. A prevention packing is provided, and an annular recess is formed which is in communication with the pressurizing chamber via the high-pressure packing and serves as a part of the pressure medium supply passage. The supply passage is connected only to the recess. Characteristic isotropic pressure press.