EP0644819A1 - Outil de moulage isostatique par compression de recipients a anses - Google Patents

Outil de moulage isostatique par compression de recipients a anses

Info

Publication number
EP0644819A1
EP0644819A1 EP94913538A EP94913538A EP0644819A1 EP 0644819 A1 EP0644819 A1 EP 0644819A1 EP 94913538 A EP94913538 A EP 94913538A EP 94913538 A EP94913538 A EP 94913538A EP 0644819 A1 EP0644819 A1 EP 0644819A1
Authority
EP
European Patent Office
Prior art keywords
handle
tool
tool according
projections
pressing
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
EP94913538A
Other languages
German (de)
English (en)
Other versions
EP0644819B1 (fr
Inventor
Oliver Glanz
Harald Sponsel
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.)
THURINGIA NETZSCH FEINKERAMIK GMBH & CO. KG
Original Assignee
Erich Netzsch GmbH and Co Holding KG
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 Erich Netzsch GmbH and Co Holding KG filed Critical Erich Netzsch GmbH and Co Holding KG
Publication of EP0644819A1 publication Critical patent/EP0644819A1/fr
Application granted granted Critical
Publication of EP0644819B1 publication Critical patent/EP0644819B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses

Definitions

  • the invention relates to a tool for the isostatic pressing of handle vessels made of powdered or granular material, with a die and a male as well as a one-piece membrane arranged between them, which is complementary to the outside of the vessel and a radial bulge with two handles for each handle has opposite side parts on which projections for forming a grip hole in the handle are formed.
  • the invention is based on the object of designing a tool for isostatic pressing of handle vessels made of powdered or granular, in particular ceramic material, in such a way that the vessels pressed in such a tool and provided with one or more handles without risk of damage can be removed and then cleaned with little effort, which is not significantly greater than the effort required to clean the vessels in the area of their mouth in general anyway.
  • the object is achieved based on a tool of the type described in the introduction in that the side parts of the or each radial bulge of the membrane are assigned an actuating device which can be actuated in such a way that the projections formed on the side parts prior to the introduction of the pressing material into the tool and during the pressing process are closely adjacent to one another and after the pressing process are arranged at a distance from one another which is at least as large as the greatest width of the pressed handle.
  • the adjusting device prevents such a wide space between the projections that a substantial amount of powder or granular material would penetrate into it when the tool was filled. As a result, remains under control Hole of the or each handle of the pressed vessel generally only a hint of a burr, in the worst case a thin skin back, which can be removed with little effort when cleaning the vessel. On the other hand, the adjusting device ensures that the projections formed on the side parts of the membrane move so far apart from one another after the pressing process that the handle formed between the side parts is not damaged when the handle vessel is removed.
  • Fig. 1 shows an axial section through a first
  • Embodiment of a tool for isostatic pressing of handle vessels an enlarged section of Fig. 1; the partial section III-III in Fig. 2; the partial section IV-IV in Fig. 2; a section of a second embodiment corresponding to FIG 2 before pressing.
  • 7 shows the left half of an axial section through a fourth embodiment during the pressing;
  • Fig. 8a the same section as i Fig 8, but after pressing.
  • the tool shown in FIGS. 1 to 4 has a pot-shaped lower tool part 10 with fluid channels 12 for introducing a fluid, which can be placed under a pressure of, for example, 280 bar, which is common in the isostatic pressing of ceramic powder or granules.
  • a die 14 is inserted into the lower tool part 10 and has a cavity 16 connected to the fluid channels 12.
  • the cavity 16 is essentially rotationally symmetrical with respect to an axis A, which coincides with the opening and closing direction of the tool.
  • a clamping ring 18 extends around the die 14, which in the usual way, e.g. is attached to the lower tool part 10 with screws and holds a radially outer edge region of a lower membrane 20 made of elastic, rubber-like plastic in a fluid-tight manner.
  • the lower membrane 20 has a main part 22 which is rotationally symmetrical with respect to the axis A and a pair of diametrically opposed radial bulges 24 for each handle of a vessel to be pressed, which in the example shown is a soup bowl.
  • the two radial bulges 24 are symmetrical with respect to a common plane of symmetry B containing the axis A and each have two essentially radial side parts 26, each of which has a projection 28 with a flat end face on the inside.
  • the two projections 28 together determine the shape and size of a grip hole of the handle to be pressed in the radial bulge 24 in question.
  • a U-shaped stiffening body 30 is embedded, which has a pair of resilient legs 32 which are essentially parallel to the plane of symmetry B and an essentially rigid base part 34 which connects these legs to one another. 1 to 4, the base part 34 is arranged below the radial bulge 24, that is to say not embedded in the rubber-like material from which the membrane 20 and its radial bulges 24 are made in one piece.
  • a lower stiffening body 36 and an outer stiffening body 38 can also be embedded in each of the radial bulges 24. All stiffening bodies 30, 36 and 38 are preferably made of spring steel.
  • the stiffening bodies 30, 36 and 38 on each of the two radial bulges 24 of the membrane 20 shown in FIGS. 1 to 4 are components of an actuating device 40 which is able to select the two projections 28 opposite one another with their flat end faces to keep a distance from each other, which is greater than the width of a pressed handle, or to compress the projections 28 so far that their end faces lie together seamlessly.
  • 1 to 4 belongs to each actuator 40, a pair of piston-cylinder units 42, which are installed in the die 14 and each have a piston rod 44.
  • Each of these piston rods 44 has a relatively large end face, which rests on the outside of the adjacent side part 26 and is preferably approximately as large as the end face of the associated projection 28.
  • the piston-cylinder units 42 can each be connected via a channel 46 feed a fluid, the pressure of which is sufficient to allow the piston rods 44, which are located opposite one another in pairs, to extend until the associated projections 28 lie close together.
  • a pressure chamber 48 is arranged around the piston rods 44, which is set independently of the piston-cylinder units 42, but preferably simultaneously with the cavity 16 below the membrane 20, optionally with a fluid under a pressure customary for isostatic pressing or can be evacuated.
  • the tool shown in FIGS. 1 to 4 also includes an upper tool part 50, which also has fluid channels 52 for a fluid suitable for isostatic pressing and contains a male part 54, which is covered with an upper membrane 56.
  • the male part 54 has a main part that is rotationally symmetrical with respect to the axis A, to which the upper membrane 56 is permanently attached, for example glued or vulcanized.
  • two diametrically opposite support bodies 58 are integrally formed on the underside of the upper membrane 56, which, when the tool is closed, as shown primarily in FIG. 4, engage in one of the two radial bulges 24 of the lower membrane.
  • the two membranes 20 and 56 delimit a pressing space 60 which can be filled with ceramic granules through radial filling channels 62. These filling channels 62 - or two of them, if there are more than two - each open into one of the radial bulges 24.
  • the tool is shown in the closed state in the left half of FIG. 1, the membranes 20 and 56 not yet being loaded with fluid pressure.
  • the filling channels 62 are still open to such an extent that ceramic granules can be sucked into the pressing chamber 60 and / or injected under increased pressure.
  • the piston-cylinder units 42 of the actuating devices 40 are actuated in such a way that the projections 28 lying opposite one another are firmly attached to one another.
  • the piston rods 24 are extended in the embodiment shown in FIGS. 1 to 4.
  • a corresponding effect can be achieved in that the pressure spaces 48 are placed under a moderate pressure, which is not yet sufficient for isostatic pressing.
  • the cavity 16 below the lower membrane 20 is in the usual way under fluid pressure of, for example, 280 bar set, and a fluid pressure of the same size is brought into effect in the pressure chambers 48 and on the upper side of the support body 58.
  • the ceramic granulate is compressed as usual in a ratio of approximately 1: 2, so that a Henkelge ⁇ vessel with a sufficient strength for removal and further processing.
  • the stiffening bodies 30 and, if present, the stiffening bodies 36 and 38 can be shaped such that they press the projections 28 firmly against one another in the absence of any hydraulic pressure.
  • the piston-cylinder units 42 are arranged such that after the pressing they move the projections 28 apart in the manner shown in FIGS. 3 and 4.
  • the piston-cylinder units 42 can also be double-acting, so that they fulfill both functions of compressing and pulling apart the projections 28.
  • the section of a second exemplary embodiment shown in FIGS. 5, 5a and 5b differs from FIGS. 1 to 4 in that the adjusting device 40 has an additional cavity 64 radially outside of the bulge 24 shown, which cavity is incorporated into the die 14 and is connected to a fluid channel 66.
  • a throttle 68 is built into the cavity 64, through which the fluid supplied to the isostatic pressing according to FIG. 5a reaches a space 70 adjoining the radially outer side of the bulge 24.
  • the hydraulic pressure built up there during pressing remains the same after pressing Fig. 5b still partially received for a short time, since the fluid can flow out through the throttle 68 only slowly.
  • the adjusting device 40 as described with reference to FIGS.
  • a corresponding effect, as shown in FIGS. 6, 6a and 6b, can also be achieved with a hydraulic piston 71 which can be controlled via the fluid channel 66 in such a way that a force acting radially inward on the bulge 24 also acts when the side parts 26 are moved apart.
  • the exemplary embodiment shown in FIGS. 7, 8 and 8a has the special feature that the die 14 is subdivided in the plane of symmetry B and the die parts thus formed can be moved away from one another transversely to this plane by means of the piston-cylinder units 42 belonging to the adjusting device 40.
  • the bulge 24 of the membrane 20 is extended radially outwards by sections 72 in which outer stiffening bodies 38 are embedded.
  • the sections 72 lie close together, they are connected to one another by a fold 74 in such a way that they can be moved particularly easily and far apart, while if necessary a residual hydraulic pressure acting on the fold relieves the pressure Handle radially inward towards the body of the handle vessel. This also makes it easier to remove the handle together with the vessel body with which it was pressed without damage.
  • FIGS. 9 and 10 differs from that shown in FIGS. 1 to 4 in that the stiffening bodies 36 and 38 are combined to form a common component which is adapted to the contour of the handle to be pressed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Press Drives And Press Lines (AREA)
  • Food-Manufacturing Devices (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

L'invention concerne un outil comprenant une matrice (14), un poinçon (54) et une membrane (20) monobloc placée entre eux, qui est complémentaire de la face extérieure du récipient et comporte pour chaque anse, une échancrure (24) présentant deux parties latérales (26) opposées l'une à l'autre. Chacune des parties latérales (26) comporte à l'intérieur une partie saillante (28) destinée à former une ouverture de préhension de l'anse. Un dispositif de positionnement (40) presse les parties latérales (26) l'une contre l'autre avant d'introduire le matériau à mouler par compression dans l'outil, ainsi que pendant le processus de moulage par compression, de manière à ce que les parties saillantes (28) se trouvent l'une contre l'autre. Après le moulage par compression, il ne reste par conséquent dans l'ouverture de préhension qu'une légère bavure qui s'élimine facilement. Pour ôter le récipient à anses moulé par compression, le dispositif de positionnement (40) écarte les parties latérales (26) l'une de l'autre jusqu'à ce que l'écartement entre les parties saillantes (28) soit plus large que l'anse.
EP94913538A 1993-04-08 1994-04-06 Outil de moulage isostatique par compression de recipients a anses Expired - Lifetime EP0644819B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4311771A DE4311771A1 (de) 1993-04-08 1993-04-08 Werkzeug zum isostatischen Pressen von Henkelgefäßen
DE4311771 1993-04-08
PCT/EP1994/001064 WO1994023917A1 (fr) 1993-04-08 1994-04-06 Outil de moulage isostatique par compression de recipients a anses

Publications (2)

Publication Number Publication Date
EP0644819A1 true EP0644819A1 (fr) 1995-03-29
EP0644819B1 EP0644819B1 (fr) 1998-02-25

Family

ID=6485184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94913538A Expired - Lifetime EP0644819B1 (fr) 1993-04-08 1994-04-06 Outil de moulage isostatique par compression de recipients a anses

Country Status (5)

Country Link
EP (1) EP0644819B1 (fr)
JP (1) JPH08504140A (fr)
CN (1) CN1039393C (fr)
DE (2) DE4311771A1 (fr)
WO (1) WO1994023917A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7563403B2 (en) 2004-07-02 2009-07-21 Graham Packaging Pet Technologies, Inc. Method of reheat blow molding a container
US7972129B2 (en) * 2005-09-16 2011-07-05 O'donoghue Joseph Compound tooling system for molding applications
DE102005045976A1 (de) * 2005-09-27 2007-03-29 Dorst Technologies Gmbh & Co. Kg Pressenvorrichtung bzw. Pressverfahren zum isostatischen Pressen eines Körpers
FR2980469B1 (fr) * 2011-09-27 2017-12-29 Arc Int France Procede et dispositif de fabrication d'un article en verre pourvu d'une anse
JP6511608B2 (ja) * 2015-05-15 2019-05-15 株式会社神戸製鋼所 等方圧加圧装置、およびそれを用いた加圧処理方法
CN106142641B (zh) * 2016-07-12 2017-12-19 董中天 等静压薄膜袋无应力模具

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3304576A1 (de) * 1983-02-10 1984-08-16 Laeis-Werke Ag, 5500 Trier Verfahren und vorrichtung zum herstellen von tiefen kegeligen oder zylindrischen keramischen hohlkoerpern aus pulverfoermiger oder granulatartiger pressmasse durch isostatisches pressen
DE3626365A1 (de) * 1986-08-04 1988-02-11 Dorst Masch & Anlagen Vorrichtung sowie verfahren zur herstellung von mit einem seitlichen fortsatz versehenen tiefenzylindrischen oder kegeligen formkoerpern, insbesondere henkeltassen
DE4032316C1 (fr) * 1990-10-11 1992-02-13 Erich Netzsch Gmbh & Co Holding Kg, 8672 Selb, De

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9423917A1 *

Also Published As

Publication number Publication date
CN1104409A (zh) 1995-06-28
CN1039393C (zh) 1998-08-05
JPH08504140A (ja) 1996-05-07
DE59405294D1 (de) 1998-04-02
WO1994023917A1 (fr) 1994-10-27
EP0644819B1 (fr) 1998-02-25
DE4311771A1 (de) 1994-10-13

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