EP0414601A1 - Vorrichtung zum Befüllen von einem Schlauch mit Pulver - Google Patents

Vorrichtung zum Befüllen von einem Schlauch mit Pulver Download PDF

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Publication number
EP0414601A1
EP0414601A1 EP90402316A EP90402316A EP0414601A1 EP 0414601 A1 EP0414601 A1 EP 0414601A1 EP 90402316 A EP90402316 A EP 90402316A EP 90402316 A EP90402316 A EP 90402316A EP 0414601 A1 EP0414601 A1 EP 0414601A1
Authority
EP
European Patent Office
Prior art keywords
powder
sheath
container
orifice
filling machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90402316A
Other languages
English (en)
French (fr)
Other versions
EP0414601B1 (de
Inventor
Jean-Paul Pizot
Didier Bordet
Christian Bonnet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Priority to AT90402316T priority Critical patent/ATE102100T1/de
Publication of EP0414601A1 publication Critical patent/EP0414601A1/de
Application granted granted Critical
Publication of EP0414601B1 publication Critical patent/EP0414601B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/004—Filling molds with powder

Definitions

  • the invention relates to a sheath powder filling machine and finds its use in particular in the manufacture of mechanical parts by sintering metal powders.
  • This technique is commonly used when the material used does not lend itself to molding: it is then poured in the form of powder into a sheath whose shape corresponds to that of the part to be manufactured. The sheath is then closed and subjected to high hot pressures which cause sintering of the powder. When the part has acquired its cohesion, the sheath is torn and rejected.
  • the main objective of the invention is to ensure the filling of the sheaths in a controlled atmosphere or preferably under vacuum in order to avoid the degradation of the powders and in particular their oxidation. According to other appreciable advantages of the invention, it is prevented that the powders do not spread outside the machine, and a correct filling of the sheaths is ensured by suitable sealing, transfer and packing means. These advantages allow the easy handling of very toxic and very fine powders like those of beryllium.
  • the machine comprises a container of powder rotating under the action of a motor around a preferably oblique axis.
  • This container is provided with an emptying orifice communicating with a vacuum pump and provided with a gas permeable and impermeable to powder filter, with a powder introduction orifice and with a powder unloading orifice. .
  • It contains a helical system of deflection fins established on its wall and leaving a clear central space around the emptying orifice.
  • the sheath and the powder discharge orifice are connected by a pipe.
  • the machine can comprise a flexible connection arranged between the pipe and the sheath as well as a vibration generator secured to the sheath to promote packing of the powder; or a valve communicating the sheath either with the pipe or with a suction pump; or an intermediate container intended for the transfer of the powder to the rotating container, this intermediate container then being provided with an orifice provided with a valve and attached to the filling orifice of the rotating container as well as with a rotating hoop that you can hang on a hoist.
  • a nozzle provided with means of connection to a container containing the powder before filling. This nozzle is provided with a valve and an end orifice which is attached to the orifice of the intermediate container.
  • Figure 1 shows the general appearance of the machine, which has been shown here inside a sealed enclosure 1, at least partially transparent and fitted with handling gloves 2 through its wall.
  • Enclosure 1 simply sketched here, offers additional protection against contamination by toxic powders in the event of rupture of sheaths or other containers, but it should be added that the machine as designed is itself dustproof in normal running.
  • Certain installations related to the machine are not shown here because they are obvious to a person skilled in the art, but can however facilitate use. It can in particular be a production line with conveyors which bring the empty sheaths in front of the machine before moving them away when they are filled. Airlocks are provided at the ends of the conveyors to introduce the sheaths into enclosure 1 or remove them. Furthermore, as will be seen later, the powder can be stored in a large volume container placed in a location not far from the machine and which is gradually emptied to supply the machine.
  • the machine comprises inter alia a rotating container 3, cylindrical with axis 4 slightly inclined on the horizontal and driven by a motor 5, a tilting intermediate container 6 used for the transfer of powder from the container where it is initially contained up to the rotating container 3, a table 7 on which a sheath 8 to be filled is placed and fixed by clamping and a pipe 9 disposed between the sheath 8 and the downstream end of the rotating container 3.
  • the rotating container 3 is shown in detail in Figure 2; it consists of a cylindrical wall 20 between two frustoconical walls 21 and 22. The first of these carries an upstream mouth 23 in which is fitted a porous sleeve 24 in the form of a cylinder and which penetrates inside the rotating container 3.
  • the porous sleeve 24 is made of an alloy called Inconel formed of stainless steel, nickel and chromium; it is permeable to gases and impermeable to filling powder.
  • the other frustoconical wall 22 is provided with a downstream mouth 25 which penetrates into a hopper 26 which constitutes the upper end of the pipe 9. As a result of the obliquity of the axis 4, the downstream mouth 25 is a little below the upstream mouth 23 and descends towards the hopper 26.
  • the downstream mouth 25 is connected to the hopper 26 by a rotary joint 40 which makes it possible to maintain the seal between these two parts.
  • the rotary joint 40 in fact comprises an outer sleeve 41 screwed to the hopper 26 and which surrounds an inner sleeve 42 screwed to the downstream mouth 25.
  • the sleeves 41 and 42 are notched with grooves which receive two parallel rows of balls 43 and 44 put in place with removable caps.
  • An annular seal 45 is clamped between the inner sleeve 42 and the downstream mouth 25, while a cable gland 46 is disposed between the sleeves 41 and 42 as well as between the rows of balls 43 and 44 and the hopper 26.
  • an O-ring 47 is clamped between the outer sleeve 41 and the hopper 26.
  • the cylindrical wall 20 is pierced with a filling orifice 27 which can be closed by a plug 28.
  • the rotating container 3 is provided on its internal wall with a propeller 29 for mixing and transferring powder which makes three turns therein, as well as additional turns in the downstream mouth 25. Vanes 30 are arranged radially from the cylindrical wall 20 towards the inside of the container 3, between the turns of the propeller 29, to increase the mixing of the powder.
  • the propeller 29 extends from the wall of the rotating container 3 towards the central axis thereof, but leaves a clear space in the center of the rotating container 3, at least on the upstream side around the porous sleeve 24; the propeller 29 further extends over substantially the entire length of the rotating container 3.
  • An oven 31 surrounds the rotating container 3 during the treatment.
  • This oven 31 has a cylindrical overall shape and consists of two half-shells 32a and 32b hinged one on the other so as to open or close.
  • a locking system 33 is provided opposite the articulation system 34.
  • the flat end walls 35 and 36 of the oven 31 are provided with a central opening 37 or 38 which, in the assembled state, surrounds with clearance upstream 23 or downstream 25 respectively.
  • the oven 31 therefore remains fixed when the rotating container 3 is set in motion. Heating is provided by electrical resistances not shown which line the internal face of its wall.
  • the pipe system 9 comprises, in addition to the hopper 26, a powder valve 50 just below this hopper 26.
  • the valve 50 is three-way, and it is sold under the reference ND-63 ISO by CETEC (Sax, Switzerland). It can take two positions: in the filling position, the hopper 26 is placed in communication with the sheath 8 by means of a bellows 51; in the other position, the sheath 8 is placed in communication with a vacuum suction duct 52 which terminates in a pump 53.
  • the bellows 51 is more precisely provided with a connection flange 54 to which a flange can be screwed 55 at the top of the neck 56 of the sheath 8. An O-ring crushed between the flanges 54 and 55 makes it possible to maintain the tightness of the connection.
  • the table 7 constitutes the plate of a vibration generator 57 started to increase the packing of the powder in the sheath 8 during filling.
  • Line 9 is also provided with a level detector 58, detailed in FIG. 5, which essentially consists of a vertical tube 59 passing through an orifice 60 at the top of the hopper 26.
  • An O-ring 61 maintains the sealing.
  • the vertical tube 59 is provided over its entire length with an electric wire 62 which terminates, at the top of the vertical tube 59, in a measurement box 63 to which also leads another electric wire 64 brought to the potential of the hopper 26.
  • the wire 62 ends at its lower end, at the bottom of the vertical tube 59, by a socket 65 connected to a conductive cable 66 stretched by a weight 67.
  • a crimping sleeve 68 surrounds the socket 65 and the upper end of the cable 66 and the keeps in place.
  • the rotating container 3 is extended on the upstream side, beyond the upstream mouth 23, by a pipe 72 which opens onto a filter 73 impermeable to the powder at the limit of the enclosure 1 and which is then extended by a suction pipe 74 connected to a vacuum pump 75.
  • the pipe 72 and the upstream mouth 23 are connected by a rotary joint 76 similar to the previous 40.
  • the motor 5 is reversible and its motor shaft carries a pulley which rotates the rotating container 3 by a belt 77 stretched over the upstream mouth 23.
  • the level detector 58 is raised, which makes it possible to switch the valve 50 so as to empty the sheath 8 by the pump 53.
  • the oven 31 is closed around the rotating container 3 and put into action to heat the powder.
  • the motor 5 and the vacuum pump 75 are also started.
  • the filling level 78 of the rotating container 3 in powder form has been indicated in FIG. 2.
  • the height of the powder is less than the width of the propeller 29, so that the powder is divided into separate quantities that the rotation of the propeller 29 moves along the axis 4.
  • the motor 5 rotates in this direction in the direction which corresponds to the upstream movement of the powder, which accumulates on the sleeve 24 and falls periodically.
  • the resulting stirring, joined to the heat promotes degassing of the powder by the vacuum pump 75.
  • the sleeve 24 theoretically prevents the powder from passing through the pipe 72 and from there to the outside; filter 73 provides additional security.
  • the powder When the neck 56 of the sheath 8 also begins to fill, the powder reaches the weight 67 and modifies the capacity of the circuit consisting essentially of the wires 62 and 64.
  • the measurement box 63 makes it possible to note this modification.
  • the motor 5 is then stopped, the level detector 58 is reassembled and the neck 56 is crushed and then sectioned a little above the powder level by a suitable tool.
  • the sheath 8 thus hermetically closed is then detached from the table 7 and stored while waiting to subject it to pressing then replaced by a new empty sheath after having unscrewed the flange 55.
  • the powder is initially contained in large volume containers called bures and referenced 80 ( Figures 1 and 3).
  • the bures have a generally cylindrical shape and end in a threaded mouth 81.
  • a turning system 82 consisting of a yoke 83 with, in its center, a threaded crown 84 which can be screwed around the mouth 81.
  • the two lateral branches 85 and 86 of the yoke 83 are articulated to the two lateral branches 87 and 88 of a hoop 89, the middle part 90 of which carries a hoist hook hole 91 .
  • a funnel 92 is welded to the crown 84 on the side opposite to that where the bure 80 is assembled.
  • the funnel 92 is provided with a vibrator 93 and a tube 94 which corresponds to the end of a compressed nitrogen circuit not shown further.
  • the tubing 94 enters through the funnel 92 and ends inside the bure 80 when the latter is mounted.
  • a valve 95 is arranged between the thinned end of the funnel 92 and an annular rim 96.
  • the crown 84 is therefore screwed to the mouth 81, then a hoist hook 97 is engaged in the hole 91.
  • the hoop 89 is raised as well as the yoke 83 and the bure 80.
  • the hoist 98 is then moved on an overhead crane, not shown in its details, near the tilting container 6. During this transfer, the gravity forces keep the bure 80 under the crown 84 and the funnel 92.
  • the tilting container 6, detailed in FIG. 4, is essentially formed by a funnel-shaped container 100 whose bottom 101, provided with support pads 99, is removable, and by a hoop 102 articulated on the funnel 100 by its two lateral branches 103 and 104, the central branch 105 of which carries a hoist hook hole 106.
  • the thinned end of the funnel 100, opposite the bottom 101, carries a valve 107 which ends in a neck 108 whose end 109 has a smaller outside diameter.
  • An O-ring 110 is threaded around the end 109 in abutment against the shoulder.
  • the tilting container 6 is supported at the start on a scale by the studs 99.
  • the end 109 is therefore oriented upwards and the hoop 102 rests on the side on the scale.
  • the bure 80 still suspended from the hook 97, is then turned over and engaged on the tilting container 6, the rim 96 coming to surround the end 109.
  • the powder flows into the funnel 92 and from there into the funnel 100 as soon as the valves 95 and 107 have been opened.
  • the vibrator 93 is turned on to promote the flow by receiving the funnel 92, and nitrogen can be blown through the tubing 94 into the bure 80 also for this purpose.
  • the balance makes it possible to measure the progressive filling of the funnel 100.
  • the valve 95 is closed when the quantity of powder necessary for filling a sheath 8 has been transferred.
  • the bure 80 is then removed, turned over and set aside.
  • the hoist 98 is brought close to the tilting container 6 and its hook 97 is slid into the hole 106 after closing the valve 107.
  • the tilting container 6 can be lifted, approached the rotating container 3 and then tipped over.
  • the plug 28 is removed and the end 109 engaged in the orifice 27; the seal 110 is then compressed between the latter and the shoulder of the neck 108.
  • valve 107 is then opened to fill the rotating container 3.
  • a vibrator 111 fixed to the funnel 100 can again be used here to facilitate decanting.
  • the bottom 101 can be removed if necessary to facilitate the total emptying of the tilting container 6 by putting it in the open air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Basic Packing Technique (AREA)
  • Formation And Processing Of Food Products (AREA)
EP90402316A 1989-08-22 1990-08-20 Vorrichtung zum Befüllen von einem Schlauch mit Pulver Expired - Lifetime EP0414601B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90402316T ATE102100T1 (de) 1989-08-22 1990-08-20 Vorrichtung zum befuellen von einem schlauch mit pulver.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8911106 1989-08-22
FR8911106A FR2651161B1 (fr) 1989-08-22 1989-08-22 Machine de remplissage en poudre de gaines.

Publications (2)

Publication Number Publication Date
EP0414601A1 true EP0414601A1 (de) 1991-02-27
EP0414601B1 EP0414601B1 (de) 1994-03-02

Family

ID=9384836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402316A Expired - Lifetime EP0414601B1 (de) 1989-08-22 1990-08-20 Vorrichtung zum Befüllen von einem Schlauch mit Pulver

Country Status (4)

Country Link
EP (1) EP0414601B1 (de)
AT (1) ATE102100T1 (de)
DE (1) DE69006979T2 (de)
FR (1) FR2651161B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516467A2 (de) * 1991-05-31 1992-12-02 Cincinnati Incorporated Eine Kompaktierpresse mit einer Vorrichtung zum Aufheizen und Einspeisen von Polymer Pulver
EP0799662A2 (de) * 1996-04-04 1997-10-08 Crucible Materials Corporation Verfahren zum Füllen einer Pressform unter vacuum mit Stahlpulver
EP2052848A1 (de) 2007-10-27 2009-04-29 Joint Solar Silicon GmbH & Co. KG Aufbereitung von Formlingen aus Reinstsilizium
CN114800858A (zh) * 2022-03-28 2022-07-29 江苏三工建材科技有限公司 一种浇注机用搅拌机芯

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114632931B (zh) * 2022-03-22 2023-09-22 江西开源自动化设备有限公司 一模多件磁场压机及其加料方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936220A (en) * 1958-01-16 1960-05-10 Gen Am Transport Central processed material discharge assembly for rotary processing vessels
FR1237010A (fr) * 1959-01-08 1960-07-22 Procédé et dispositif pour introduire et extraire de façon continue des matières dans un dispositif de séchage sous vide à tambour tournant
US2946524A (en) * 1958-08-11 1960-07-26 Patterson Foundry & Machine Co Lump breaker for vacuum dryer
US3832107A (en) * 1973-06-29 1974-08-27 United Aircraft Corp Apparatus for making articles from particulate matter
US4336910A (en) * 1980-09-08 1982-06-29 Judson Jr Carl Milling apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936220A (en) * 1958-01-16 1960-05-10 Gen Am Transport Central processed material discharge assembly for rotary processing vessels
US2946524A (en) * 1958-08-11 1960-07-26 Patterson Foundry & Machine Co Lump breaker for vacuum dryer
FR1237010A (fr) * 1959-01-08 1960-07-22 Procédé et dispositif pour introduire et extraire de façon continue des matières dans un dispositif de séchage sous vide à tambour tournant
US3832107A (en) * 1973-06-29 1974-08-27 United Aircraft Corp Apparatus for making articles from particulate matter
US4336910A (en) * 1980-09-08 1982-06-29 Judson Jr Carl Milling apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516467A2 (de) * 1991-05-31 1992-12-02 Cincinnati Incorporated Eine Kompaktierpresse mit einer Vorrichtung zum Aufheizen und Einspeisen von Polymer Pulver
EP0516467A3 (en) * 1991-05-31 1993-02-03 Cincinnati Incorporated Polymer coated powder heating and feeding system for a compacting press
EP0799662A2 (de) * 1996-04-04 1997-10-08 Crucible Materials Corporation Verfahren zum Füllen einer Pressform unter vacuum mit Stahlpulver
EP0799662A3 (de) * 1996-04-04 2007-03-28 Crucible Materials Corporation Verfahren zum Füllen einer Pressform unter vacuum mit Stahlpulver
EP2052848A1 (de) 2007-10-27 2009-04-29 Joint Solar Silicon GmbH & Co. KG Aufbereitung von Formlingen aus Reinstsilizium
WO2009053084A1 (de) * 2007-10-27 2009-04-30 Jssi Gmbh Aufbereitung von formlingen aus reinstsilizium
CN114800858A (zh) * 2022-03-28 2022-07-29 江苏三工建材科技有限公司 一种浇注机用搅拌机芯

Also Published As

Publication number Publication date
DE69006979D1 (de) 1994-04-07
DE69006979T2 (de) 1994-09-08
EP0414601B1 (de) 1994-03-02
ATE102100T1 (de) 1994-03-15
FR2651161B1 (fr) 1991-10-18
FR2651161A1 (fr) 1991-03-01

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