JPS5980701A - Method and assembly for high temperature densification of materials - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used to densify metal powder and non-metal powder composition materials and combinations thereof to form concrete of a predetermined density. Densification is typically accomplished by evacuating the container, filling it with the powder to be densified, hermetically sealing the container, and then applying pressure to the container to compress the powder within the container. . Typically, heat is also applied to heat the powder to compression temperature. The combination of heat and pressure thus facilitates densification of the powder.

It is widely known to place a hermetically sealed container containing a powder in an autoclave or hot isostatic press and apply heat and gas pressure.

Autoclaves or hot isostatic presses are expensive and
Due to its limitations, it has undergone considerable development. These developments have enabled, for example, the powder to be compacted to be enclosed in a completely dense, incompressible container, which constitutes a square transmission medium and which can be used both at ambient temperature and at elevated compaction temperatures. It maintains its shape perfectly, yet becomes fluidized or flowable when pressure is applied to the entire external surface, allowing hydrostatic pressure to be applied to the internal powder to enable compression molding.

Typically, the powder is hermetically sealed within this pressure transmission medium and then heated to a temperature suitable for compaction and densification. After sufficient heating, the pressure transmission medium loaded with powder is placed between the two dies of the press.

The two dies are quickly closed, applying pressure to the entire exterior of the pressure transmission medium. The pressure transmission medium is completely congruent and incompressible, at least until immediately before a predetermined densification, so that the pressure transmitted to the powder is hydrostatic pressure from all directions, and
Must be flowable. After the material has been densified to the required degree, the pressure transmission medium that constituted the container must be removed from the compressed material. In this process, the integrity of the pressure transmission medium is lost and the pressure transmission medium can no longer be used and is either remade into a new container and recycled. It is used to densify the composition material of metal powder and its combination material to form a dense colloid with a predetermined density, by heating a large amount of the material whose density is less than the predetermined density, and by heating the material of the pressure transmission medium. and applying an external pressure to the entire external surface of the medium until the medium becomes completely dense, incompressible, and capable of elastic flow, at least immediately before a predetermined densification. When this happens, the material is molded to a predetermined density by the hydrostatic pressure applied from the medium in response to this change.

The present invention utilizes an elastomeric pressure transmission medium and encapsulates the material within a means of an insulating barrier disposed within a cavity within the elastomeric medium, prior to applying pressure to the medium.
A thermal barrier is provided between the material to be compressed and the elastomeric medium to limit heat transfer between the material and the elastomeric medium.

In order for a press to perform hydrostatic compression through a completely dense, incompressible medium, the press must exert enough force to cause plastic flow in the medium. Typically, the material to be compressed is placed in a pressure transmission medium, the medium is placed in a press, the press applies pressure to the medium to fluidize it, and the pressure is transmitted as hydrostatic pressure to the material to be compressed; During this process, the shape of the pressure transmission medium changes. Moreover, the pressure transmission medium completely encapsulates the material being compressed and, after compression, is removed from the material and loses its shape integrity. The pressure transmission medium changes its shape during compression and its integrity is destroyed by removing it from the compressed material, so it cannot be reused as it is, and it is necessary to further processing is required. An advantage according to the invention is that the pressure transmission medium is con! Immediately before a given densification of the material, it becomes completely dense and incompressible, consisting of an elastomeric medium capable of elastic flow, yet elastic enough to return to its original shape after compression, so that no continuous The point is that it can be reused and recompressed many times. The above advantages are achieved in accordance with the present invention by providing a means of thermally insulating barrier between the elastomeric medium and the heated material to be compressed, so that the integrity of the elastomeric medium is not degraded by heat, even during subsequent iterations. This can be achieved by making it available.

The present invention is used to densify various metal and non-metal powders and combinations thereof to form dense compacts. According to the present invention, the density of the powder can be increased to a predetermined or desired density. Further, the desired density may be full density or completely dense, or may be full density or a density less than perfectly dense.

The present invention relates to compositions of metal powders and non-metal powders, and methods for densifying the combined materials to form densified compacts of a predetermined density. According to the invention,
encapsulating a quantity of said composition material having a density lower than a predetermined target density in a pressure transmitting medium and applying pressure over the entire external surface of said medium, just before said medium achieves at least a predetermined densification; When , becomes completely dense and incompressible, and becomes a medium capable of elastic flow, i.e., fluidization, in response to this change, the encapsulated material is reduced by the hydrostatic pressure exerted by this medium. can be densified to a predetermined density. In other words, the medium transmits the applied pressure to the material as hydrostatic pressure in all directions like a liquid, compressing the material.

The present invention will be described below with reference to the accompanying drawings. In the example shown in the figure, a quantity of powder 10 that is less than fully dense is present in the container 12.
and is enclosed within it. This container is
It is evacuated via a tube (not shown), for example by vacuum, and then the powder is filled into the container under the tube vacuum. After filling, the tube is sealed L7 to hermetically seal the container 12 and the powder IO is placed under vacuum. The container 1z is a thin-walled container, preferably constructed of a thin sheet metal material.

The aforementioned container 1z is covered by U.S. Pat.
It is best to fill and seal according to the teachings of q, gq No. 2.

The container 12 has a circular cross section so as to constitute a cylinder, and has a filling tube (not shown) extending from one end of the container.
have. However, it will be appreciated that the shape of the container 12 will depend on the desired shape of the final component.

As shown, an assembly for practicing the invention includes a pot die 14 and a ram 16, both of which are connected to the pot die 14.
The key point is to attach the alignment key to align the ram 16 with the ram 16. d? The knot toy 14 and ram 16 also have holes 20 for receiving bolts or bottles for attaching the pot die 14 and ram 16 to a press, the press being of any one of a number of well-known types. good. The ram 16 and pot die 14 are aligned during opening and closing of the press between the B release position shown in FIG. 1 and the closed position shown in FIG.

The pressure transmitting body consists of @/ and @conilus 1 ma parts 22 and 24, these parts 22, 24 forming a cavity for enclosing the material to be densified. Pot die 14 is made of a non-compressible material such as steel and has a pot die cavity 26. Similarly,
Ram 16 is also made of a non-compressible material such as steel and has a ram cavity 28 therein. The ram 16 also has a raised flange or ledge 801 surrounding the ram cavity z8. The pot die cavity 26 has a circumferential surface for receiving the ridge 7 flange 80 of the ram 16 and for sliding engagement with its exterior surface. In other words, the interior surface of the cavity 26 of the pot die 14 is aligned with the exterior surface of the 7 flange 80 of the ram 1G, so that when the pot die 14 and the ram 1G are closed, they are in tight sliding engagement with each other.

The first portion z2 of elastomeric media is held within the pot die cavity 26 by wedging it inside the I-side die cavity 26 or by securing the elastomer portion to the cavity 26 with a small amount of adhesive.
The elastic lastoma portion z4 is also retained within the ram cavity 28 in a similar manner. The first and PR2 elastomeric portions 22 and z4 constitute a cylindrical cavity for enclosing the material IO for compression of the material. The elastomer portions 22 and 24 are made of natural rubber, neolune,
Elastomers such as polysiloxane elastomer, polyurethane, I-resulfide pumice, polybutadiene, and Buna S1 may also be used. The elastomeric medium comprising elastomeric portions 22 and 24 is elastic in that it is compressed and returns to its original shape. However, after the elastomeric medium comprising portions 22 and 24 has been compressed to a certain extent, it becomes nearly incompressible 9, yet allows fluidization or elastic flow, which is critical to the compaction and desired densification of the powder 10. , the elastomeric medium applies hydrostatic pressure in all directions around the container 12, compressing the powder 10 within the container. container 12
is of thin-walled material, reducing its volume and compressing the powder 10.

Powder 10 has the following characteristics to facilitate densification and compression of the powder:
Heated to high temperatures. The first part and the third part z2 and 24
In order to retain the film of the elastomer medium that makes up the
4 and ram 16 to apply pressure to the media 22 and 24, a thermal barrier means establishes a thermal barrier between the powder material lO and the elastomeric media 22 and 24, and the material lO and the media 2z and 24.

A thermal barrier means completely surrounds the container 12 and includes a material 10.
a first insulating jacket 82 to limit heat loss from the first insulating jacket 82 and elastomeric media 2z and 24 surrounding the first
and a first insulating jacket 34 that protects the stone from heat transmitted from the first jacket 82.

According to the invention, the jackets 82 and 84 are made of a ceramic material with extremely low thermal conductivity. Furthermore, the material of construction of this jacket is such that the pressure is
and 24 to allow fluidization or elastic flow, at least immediately prior to the desired compaction of the powder 10. It is assumed that the material of jackets 82 and 84 flows like quicksand just before compaction.

In a preferred embodiment, the seventh jacket 82 is cast in a mold around the container 12 so as to completely enclose the container 12, and is of a uniform material. Container] 2 and powder material] 1st jacket with 0 inside)! 32 to a high temperature suitable for compression. During this heating, the jacket 8z becomes heated. The container 12 and jacket 82 with the material therein are then placed into the second jacket 84 within the cavity defined by the elastomer sections 22 and 24.

The second jacket (84) consists of two complementary parts that fit together to surround and completely enclose the first jacket. The first jacket 84 is also fluidizable or flowable just prior to the desired densification of the powder 10. When the heated material 0 is placed in the container 12, the container is sealed in the first jacket 3z, and placed in the stake jacket 84 as shown in FIG. 1, the press closes and the pot die 14z! : Close the ram 16 so that the flange 80 of the ram 16 enters the cavity 26 of the pot die]4. Before the elastomeric portions 22 and 24 come into contact with each other, they enter the flange 80 pot die J4 cavity Z6;
After binding, sections 22 and 24 are compressed and section 22.2
4 becomes incompressible and fluidized, causing hydrostatic pressure,
This hydrostatic pressure is transmitted to the first jacket 84 in all directions, and the first jacket 84 transmits this hydrostatic pressure via the jacket 82 and the container 12 to compress and densify the metal powder 1o. To compensate for the difference in thermal expansion coefficient, the jacket 32
Either or both of and 84 is the jacket 82
Alternatively, it may be made of ceramic with reinforcing fibers therein that allow for the contraction or expansion of the 84 base material. That is,
Both jackets 82 and 84 may be reinforced with fibers dispersed within one of them. Also, jackets 82 and 8
4 is crushed and becomes incompressible, and the elastomer part z
2 and 24 to the vessel 12 and then to the powdered metal lO.

The flange 8o of the ram 16 is inserted into the cavity 2o of the pot die 14 before the elastomer portions 22 and 24 engage each other.
It is important to control the movement of the elastomer parts 2z and 24 into the elastomer.

Furthermore, for similar purposes, a hard seal 80 is disposed within the lower end cavity 26 at the upper end of the cavity 26 of the pot die 14 and is located at the lower end of the cavity 26 of the ram 16. enters pot die 14 and applies pressure to elastomer portion 22 and z4, this seal 86 is pressed against flange 8 of ram 16.
Outside of °? ! (Pot die 14 is busy at the joint with surface 1.
sealingly engages the interior surface of the cavity 26 of the elastomer portions 22 and 24 between the ram 16 and the pot die 14 to prevent leakage. Seal 86 seals elastomer portions 22 and 24.
Since it is made of a material with good hardness, the sealing material 86
Even if it is a plastically flowable material, its flow dust will be low.

When the flange 8o of the ram 16 enters the cavity 26 of the pot die 14, the elastomer sections 22 and 24 engage each other and begin to compress, the sections 22 and 24 becoming incompressible and applying hydrostatic pressure to the metal powder 10 in all directions. to compress the metal powder 1o. During its initial compression, the elastomeric sections 22 and 24 are exposed to the pot die 1, with sections 22 and 24 being pupiled.
4 and ram 16 relative to the cavity surfaces thereof, respectively. Accordingly, portions 22 and 24 and seal 8
6t;t has a plurality of lubrication grooves 88 and 40 on its outer surface to facilitate movement relative to the adjacent support surface of the cavity. Preferably, a lubricant is placed in grooves 88 and 40 to cause the material to compress and slide against the adjacent surfaces. As shown in FIG. 2, portion 22. At full compression of and 24, the grooves shrink and become invisible, but the grooves are present to trap the incompressible lubricant during full compression.

According to the invention, powdered metal 10 is filled into a thin-walled container 12, which is surrounded by a jacket 32, for example.
are encapsulated in the first insulating jacket 8z by casting and then heated to a high enough temperature to compress the powder IO. Thereafter, the lower portion of the first jacket 84 is placed within the cavity of the elastomeric portion 22 of the pot die 14, and the first jacket 82 containing the powder is placed within the lower portion 84 of the first jacket. The top of the first jacket 84 is then placed over the heated fc seventh jacket 82, and the ram and pot die are then moved relative to each other at position 1 in FIG. 10'
Make it. The elastomeric medium comprising portions 22 and 24 is initially compressible, but once the pressure reaches a certain point,
The non-compressible shells transmit hydrostatic pressure in all directions around the circumference of jackets 82 and 84 to compact and densify powder 10 into the desired livestock compact 10'. pot dye 1
4 and ram 16 to open the elastomer sections 22 and 24.
After being restored to its pre-compression shape, the compact 10' is removed 2 and the container 1z and jackets 82 and 84 are removed to expose the compact 10'. Normally, the jackets 82 and 84 are discarded and a new jacket is used the next time the pot die 14 and ram 16 are opened and closed to continuously form the convex 10'.

Depending on the situation, it is also possible to use only one layer of heat insulating jacket between the heated powder material lO and the elastomer portions 22 and z4, and this seems to be the case in many cases. Additionally, the thickness of the thermal barrier means may vary depending on the size, form, volume, etc. of the powder 10 to be compressed and densified.

So far, the present invention has been explained along the drawings, but
The special terminology used in this text is used in its essential meaning, and it goes without saying that it does not limit the scope of the term -.

Moreover, from the description of the invention, many variations and modifications may be made to the invention. Therefore, within the scope of the claims, the invention may be practiced otherwise than as described in the specification. Reference signs in the claims are for convenience only and do not imply any limitation.

[Brief explanation of drawings]

Figure F/ is a cross-sectional view of the assembly used according to the invention in the open position. FIG. 2 is a perspective view similar to FIG. 1 showing the assembly in a closed position; FIG. 3 is a partial cross-sectional view taken along line 3-3 of FIG. Figure q is a cross-sectional view of a portion of the external surface of a seal used in the assembly of the present invention. Reference code lO...Powder, 1'2J...Container, 14...Die, ]6...Ram, 18...Mounting point, 2.0
... Hole, 22... First elastomer part, 24...
First elastomer part, 26...pot die cavity, 28...ram cavity, ? )0...7 lunge,
82...First heat insulating jacket, 84...First heat insulating jacket, 86...Seal, 88.40...Groove.

Claims (1)

[Claims] (1) Metal and nonmetal composition material (10), and
A synthetic material (10) made of the combination material is densified at high temperature to a predetermined density (2 (10'))
a method of forming a pressure transmitting medium (22, 24) by heating a quantity of said material (10) having a density lower than a predetermined density and placing it into a cavity of a pressure transmission medium (22, 24); ), such that the medium (22, 24) becomes completely dense and incompressible, at least just before achieving a predetermined densification, allowing elastic flow. This is a method in which the material (10) is formed to a predetermined density by hydrostatic pressure applied from the medium (22, 24) in response to this change at 131. Prior to applying pressure, the material (10) is encapsulated within an insulating barrier means (32, 34) within the cavity.
and the elastomeric medium (22, 24), and the material (10) and the elastomeric medium (22, 24).
Said method, characterized in that it limits the heat transfer between. ) In the method according to claim 1, the material (10
) surrounds a first insulating jacket (32) to prevent heat loss from the material (10) and the same of the first jacket (32), and the elastomeric media (22, 24) are connected to the first jacket (32). ) to protect from the heat of ) (3
4) The method is characterized in that the insulating barrier is encapsulated within a means having: 1% In the method described in claim 2, the first jacket (32) and the material (10) are enclosed in the second jacket (34), and the material (10) is enclosed in the medium (22, 24). Prior to placement, the material (10) is heated and the first jacket (32)
Patent (4) In the method described in claim 3, the material (10) is sealed in a sealed container (12), and then the material is sealed in a sealed container (12). (10
) in the first jacket (32). (5) In the method described in claim 4, the container (
12), the first jacket (32) being constructed of a single piece of material. (6) In the method set forth in claim 5, the first jacket is arranged in a second jacket (34) which is composed of a plurality of parts that are fitted around the first jacket (32). A method characterized by: (7) In the method recited in any one of claims 1 to 6, immediately before achieving the planned densification, the material becomes at least partially fluidized and flowable. A method characterized in that a thermal barrier means (32, 34) is used. (8) A heat shielding means (32, 34)
(9) In the method according to any one of claims 1 to 6, the elastomer medium (22, 2
4), applying pressure to the medium (22, 24) by placing it between the ram (16) of the press and the pot die (14). tlol % In a method as claimed in any one of claims 1 to 6, a first portion (22) of elastomeric media is mounted inside a pot die capacity (26), and the elastomer A second portion (24) of media is attached to a ram (16) that is capable of entering and exiting in close sliding engagement with the pot die cavity (26), and the first (22) and second (24) elastomeric portions They engage each other and both (2
2, 24) before enclosing the means (32, 34) of the ram (16).
) is positioned within the cavity (26) of the pot die (14), the first (22) and second (24) elastomeric portions are positioned such that the first and second portions of the elastomeric medium are
The elastomer medium (22, 24) is continuously opened and closed according to the opening and closing operations of the ram (16) and the bot die (4) of the press, so as to continuously form a plurality of dense pressure-formed bodies (10'). A method characterized by applying pressure to αυ Any one of claims 1 to 6
In the method described in Section 1, a first portion (2
2) inside the pot die cavity (26),
A second portion (24) of elastomeric media is mounted on a ram (16) that is movable into and out of the pot die capacity (26) in sliding engagement with the first (22) and second portion (24). (24) The ram (
The first (22) and second (24) elastomer portions are positioned such that the first (22) and second (24) elastomer portions are located within the cavity (26) of the pot die (14), and the first and second portions of elastomer media are placed within the ram (26) of the press. 16) and the bot die (14) to apply pressure to the elastomeric medium (22, 24) so as to continuously open and close a plurality of dense press-molded bodies (10'); Furthermore, a plurality of lubrication grooves are provided on the surface of at least one of the portions (22, 24) of the elastomeric media to provide support for the media (22 and/or
or 24) a method characterized by smoothing the movement. Any one of the claim ratios 1 to 6 of α
In the method described in Section 1, a first portion (2
Attach 2) inside the pot die capacity (26),
A second portion (24) of elastomeric media is attached to a ram (16) which is capable of entering and exiting in intimate sliding engagement into a pot die capacity (26), with the first (22) and second (24) ) the elastomer parts engage each other, both (2
A thermal barrier inside the cavity defined by the ram (16, 24) before surrounding the means (32, 34).
) positions the KFl (2z) and the second (24) elastomer portion so that it is within the cavity (26) of the pot die (]4), and the first and second portions of the elastomeric medium are
It opens and closes according to the opening and closing movements of the ram (16) and pot die (4) of the press, and produces multiple precise contacts A? (10)
The elastomeric medium (22,2
4) and further pressurize the elastomeric medium (22) at the inner lower end of the cavity (26) of the pot die (14).
a seal (36) made of a harder material than the
After the ram (16) enters the pot die (14),
When pressure is applied to the elastomeric medium, the seal (36) is pressed into sealing engagement with the cavity (26) of the pot die (14) at its interface with the ram (16), causing the elastomeric medium (22) to A method characterized in that it prevents leakage between the ram (16) and the pot die (14). αhiro In an assembly for molding a compact compact to a predetermined density by subjecting a composition material (IQ) consisting of a composition material of metals and non-metals, or a combination of both at high temperature to a predetermined density, the apparatus comprises: A large amount of said material of lower density than the planned density (
] 0) into the cavity of the pressure transmission medium (22, 24), applying external pressure over the entire external surface of this medium (22, 24), so that this medium (22, 24) is at the latest Immediately before achieving densification, when the material (10) becomes completely dense, incompressible, and capable of elastic flow, the hydrostatic pressure applied from the medium (22, 24) corresponds to this change. It is an apparatus for forming to a predetermined density, wherein the pressure transmission medium (22, 24) is composed of an elastomer medium, and further, the pressure transmission medium (22, 24) surrounds the material (1o) and is formed of an elastomer medium (1o). 2
The material (10) and the elastomeric medium (2) have an insulating barrier means (32, 34) disposed within the cavity of the material (10) and the elastomeric medium (2, 24) before pressurizing the medium (22, 24).
Set a thermal barrier between 2 and 24) and add the material (10)
14. An assembly according to claim 13, characterized in that said thermal barrier means (32, 24) limit heat transfer between said thermal barrier means (22, 24). , 34) is further added to the material (1
a first insulating jacket (32) for limiting heat loss of
), surrounding the first jacket α camphor (32),
An assembly characterized in that it has a second insulating jacket (34) for protecting the elastomeric media (22, 24) from the heat of the first jacket. (l!9%) In the assembly according to claim 14, the closed container (12) for enclosing the σ field material (10)
', the first jacket (32)
is an internal cavity corresponding to the external shape of the container (12).
1. An assembly characterized in that the assembly has a cavity in which the container is housed. 16. An assembly according to claim 15, characterized in that said first jacket (32) is constructed of a single piece of material surrounding said container (12). In the assembly according to claim 16, the second
An assembly characterized in that the jacket (34) is comprised of a plurality of parts that fit and engage each other surrounding the first jacket (32). Any one of claims 13 to 17
In the assembly according to paragraph 1, the insulating barrier means (32
, 34) is at least partially fluidized and becomes flowable just before achieving the intended densification. An assembly according to any one of claims 13 to 17, characterized in that said thermal barrier means (32,
34) having reinforcing fibers dispersed therein, at least in part. The assembly according to any one of claims 13 to 17, further comprising a ram (16) and a pot die (14) for applying pressure to the medium (22, 24). An assembly comprising: QIl An assembly according to any one of claims 13 to 17, in which the elastomeric medium (22, 24) comprises a first (22) and a second (24) part. said first portion (22) of said elastomeric medium
) is mounted in the cavity (26) of said pot die (14) and said second portion (2
4) is attached to the ram (16), and the ram (16) is attached to the ram (16).
) is the capacity (26) of the pot die (14).
The configuration of the first and second elastomeric portions (22, 24) and the ram (16) and pot die (14) allows for intimate sliding engagement into and out of the elastomer. Before the parts (22, 24) engage with each other and surround the thermal barrier means (32, 34) in the cavity defined between them (2, 2, 24), the ram ( 16) is configured to fit into the cavity (26) of the pot die (14), thereby allowing the first and second elastomer portions (22, 2
4) The ram (16) and pot die (
14) An assembly characterized in that it opens and closes continuously in accordance with the opening and closing operation' of item 14), and continuously molds a plurality of densified pressure-molded bases (io'). I23 An assembly according to any one of Claims 13 to 17, in which the elastomer medium (22, 24) comprises a first (22) and a second (24) part. said first portion (22) of said elastomeric medium;
) is mounted in the cavity (26) of said pot die (14) and said second portion (2
4)' is attached to the ram (16) and the ram (1
6) is the cavity (26) of the pot die (14).
), the first and second elastomeric portions (22, 24) being capable of intimate sliding engagement entry into and exit from the first and second elastomeric portions (22, 24);
and the configuration of the ram (16) and the pot die (14) is such that the elastomer portions (22, 24) engage with each other to reduce the thermal insulation in the cavity defined between them (22, 24). The ram (16) is configured such that it enters the cavity (26) of the pot die (14) before surrounding the barrier means (32, 34), whereby the first and second elastomer portions (22,2
4) The ram (16) and pot die (
14) to continuously open and close a plurality of densified pressure-molded bodies (10'), and at least one of the elastomer parts (22, 24) is connected to one of the rams (10'). 16) or a plurality of lubricating #s (38) on the surface in contact with the pot die (14) to facilitate movement of said elastomeric part relative to an adjacent support surface of said ram or pot die. (2) In the assembly according to any one of claims 13 to 17, the elastomeric medium comprises:
consisting of a first (22) and a second (24) elastomer portion, the first portion (22) of the elastomer medium being sloped into a cavity (26) of the pot die (14); said second portion (24) of said pot die (14) is attached to said ram (16), said ram (16) being able to enter and exit said cavity (26) of said pot die (14) in close sliding engagement. It is possible, and the configuration of the first and gg2 Efstoma portions (22, 24) and the ram (16) and pot die (14) is
the elastomer portions (22, 24) engage each other;
The ram (16) is inserted into the cavity (26) of the pot die (14) before enclosing the thermal barrier means (32, 34) in the cavity arranged between the two (22, 24). the first and second elastomeric portions (22, 24);
However, the ram (16) and pot die (14) in the press
) to continuously open and close a plurality of densified pressure-formed bodies (10'), and to form a seal (10') made of a harder material than the elastomeric medium (22).
36) into the cavity (26) of the pot die (14)
The ram (16) is placed at the lower end of the inside and the ram (16) is connected to the pot die (1).
4), the elastomeric medium (22, 2)
4), the seal (36) is pressed and sealed into the cavity (26) of the pot die (14) at the joint surface with the ram (16), and the elastomer medium (22) prevents leakage between said ram (16) and pot die (14). (c) In the assembly according to any one of claims 13 to 17, the elastomer medium is
consisting of a first (22) and a second (24) elastomeric portion, the first portion (22) of the elastomeric medium being mounted within a cavity (26) of the pot die (14); Said second portion (24) is attached to said ram (16), said ram (16) capable of entering and exiting in close sliding engagement into said cavity (26) of said pot die (14). and the first and second elastomer portions (22, 24);
The configuration of said ram (16) and pot die (14) is such that said elastomer portions (22, 24)' engage with each other;
The ram (16) is inserted into the cavity (26) of the pot die (4) before surrounding the thermal barrier means (32, 34) in the cavity arranged between the two (22, 24). the first and second elastomer portions (22, 24);
However, the ram (16) and pot die (14) in the press
) to continuously open and close according to the opening and closing movements of the elastomer medium (22), and continuously form a plurality of densified pressure-formed bases (1□0') to form a seal (22) made of a harder material than the elastomer medium (22). 36) to the capacity (2) of the pot die (14).
6) and after the ram (16) enters the pot die (14), the elastomer medium (2)
When pressure is applied to the pot die (1), the seal (36) closes the pot die (1) at the interface with the ram (16).
4) is crimped and sealingly secured to said cavity (26) to prevent elastomer medium (22) from leaking between said ram (16) and pot die (14), and the surface of said seal is chamfered at an acute angle with respect to the direction of entry of the ram (16) into the pot die (14), facing the capity (26) of the pot die (14);
Assembly characterized in that said seal (36) has a groove (40) on its external surface. In an assembly for molding a pressure-molded base (10') C, which is densified by high-temperature and close-pressing a synthetic material (10) of metals and non-metals, and a synthetic material (10) consisting of a combination of both. , made of incompressible material, and has a ram capity (28) inside! - a ram (16) having a protruding flange (30) around said ram cavity (28), and comprising an incompressible material; a pot die (14) having a pot die cavity (26) having a peripheral surface for accommodating a surface and for sliding engagement with said surface; a second portion (24) of elastomeric media retained within a ram cavity (28) of said ram (16), said first and second elastomeric portions (22, 24); 7>E, form a cavity to surround the material, ram (16) and pot die (1
4) An assembly characterized in that a pressure-molded base (io') is continuously formed in the cavity by the continuous opening and closing operation of the above. Cypress An assembly according to claim 25, in which a thermal barrier is provided in the cavity constituted by the elastomer medium (22, 24) for surrounding the material (1o) to be pressed. An assembly characterized in that it comprises means (32, 34). 26.) An assembly according to claim 26, wherein said thermal barrier means (32, 34) comprises said material (10).
a first insulating jacket (32) for limiting heat loss of the first jacket (32), and a first insulating jacket (32) for surrounding the first insulating means (32) and protecting the elastomer medium (22, 24) from the heat of the first jacket (32). a second insulating jacket) (34). @ The assembly according to claim 27, which includes a sealed container (12) for enclosing the material (10), and the first jacket (32) holds the container (12). An assembly characterized in that it has an internal cavity corresponding to the external shape of said container (12) for enclosing it. 4. An assembly according to claim 28, characterized in that said first jacket (32) surrounds said container (12) and is constructed of a single piece of material. 29. In the assembly according to claim 29, the second jacket (34) is connected to the first jacket (32).
) having a plurality of portions that fit and engage each other. C31) In an assembly according to claim 30, a seal (36) made of a harder material than the elastomeric medium (22) is placed inside the cavity (26) of the pot die (14). Place the lower pant and the ram (16
) into the pot die (14), applying pressure to the elastomeric medium (22, 24) causes the protruding flange (30) of the ram (16) and the pot die cavity (26) to At the joint surface with the surrounding surface,
The seal (36) is crimped into the cavity (26) of the pot die (14) for a sealing fit, and the elastomer medium (22, 24) is disposed between the ram (16) and the pot die (14). An assembly characterized in that it prevents leakage. 3z Claims 25, 26, and 3
In the assembly according to any one of clauses 0, the elastomeric medium (22, 24) is located at least in the cavity (26) of the ram (16) and the pot die (14) among its external surfaces. An assembly characterized in that it has a lubricating groove (38) on the surface facing any one of the two. c! 3. In the assembly according to any one of claims 26 to 30, immediately before achieving the adiabatic bar shape, the assembly becomes at least partially fluidized and flowable. An assembly according to any one of claims 26 to 50, characterized in that the thermal barrier means (32, 34) is reinforced An assembly characterized in that it has fibers dispersed therein.