EP0662027A1 - Installation de moulage et procede de moulage sous pression de pieces ceramiques - Google Patents

Installation de moulage et procede de moulage sous pression de pieces ceramiques

Info

Publication number
EP0662027A1
EP0662027A1 EP94923733A EP94923733A EP0662027A1 EP 0662027 A1 EP0662027 A1 EP 0662027A1 EP 94923733 A EP94923733 A EP 94923733A EP 94923733 A EP94923733 A EP 94923733A EP 0662027 A1 EP0662027 A1 EP 0662027A1
Authority
EP
European Patent Office
Prior art keywords
molded part
casting
holders
demolding
pivot axis
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
EP94923733A
Other languages
German (de)
English (en)
Other versions
EP0662027B1 (fr
Inventor
Günther Söthje
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 EP0662027A1 publication Critical patent/EP0662027A1/fr
Application granted granted Critical
Publication of EP0662027B1 publication Critical patent/EP0662027B1/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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/265—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor pressure being applied on the slip in the filled mould or on the moulded article in the mould, e.g. pneumatically, by compressing slip in a closed mould
    • B28B1/266—Means for counteracting the pressure being applied on the slip or on the moulded article in the mould, e.g. means for clamping the moulds parts together in a frame-like structure
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/267—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor in moulds or on moulding surfaces supported by, or formed in or by, conveyors
    • 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
    • B28B5/00—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping
    • B28B5/06—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping in moulds on a turntable
    • B28B5/08—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping in moulds on a turntable intermittently rotated

Definitions

  • the invention relates to a casting system according to the preamble of claim 1.
  • Such casting systems are primarily provided for casting sanitary ceramic castings such as wash basins, toilet bowls or the like using plastic molds.
  • each pair of associated molded part holders is arranged in a frame which has a rocker pivotally mounted on the turntable by means of two pivot pins as the lower frame part, two of which are parallel to each other
  • the pivot pins are each mounted on an arm projecting radially from the turntable, and the yoke is attached to the upper end of a stand which is attached to the edge of the turntable and projects vertically upwards in such a way that the guide rods lie in a plane inclined upwards.
  • a plurality of frames are attached to the turntable at uniform circumferential intervals, each enclosing a pair of mold holders together with the mold parts held by them.
  • On the guide rods of each frame there is a crossbeam to clamp and pull apart the molded part holders enclosed by the frame attached to the associated yoke hydraulic cylinder displaceable.
  • Cast mold parts belonging together lie in a mold parting plane normal to the associated tie rods, which plane is inclined slightly radially inwards against the rotary table.
  • the lifting table together with the carriage and the casting lying thereon is then lowered, and then the lower molded part holder together with the lower molded part fastened thereon is pivoted up again by means of the pivoting device, and finally the cross member is velvety by means of the hydraulic cylinder attached to the yoke of the frame the upper mold part holder and the upper mold part attached to it are lowered again along the guide rods so that the mold is closed again and ready for refilling with casting slip.
  • This known casting installation with its number of frames, traverses and associated hydraulic cylinders corresponding to the number of casting molds, requires a considerable amount of space and has a large inert mass which must be accelerated and stopped again with each of the rotary movements of the rotary table taking place gradually.
  • the pressure medium supply to the numerous hydraulic cylinders attached to the rotary table also requires considerable effort.
  • the invention is therefore based on the object of providing a casting installation which is particularly suitable for die casting sanitary ceramic castings and which is at least as powerful in comparison with the known casting installation described above, but requires less production effort and takes up less space.
  • the rotary table only has to transport the molded part holders, casting mold parts and associated clamping bodies. All drives for unlocking and locking the clamping bodies and for moving the mold parts apart and together are arranged, like the swivel drive, in the demolding station and are available there for all molded part holders and associated molds rotating with the rotary table, regardless of their number.
  • the invention further relates to a method for casting ceramic castings according to claim 10.
  • the elastic deformation of the mold parts according to the invention before the mold is opened has the effect that the cast part formed therein is compressed and consequently obtains a better surface quality and is more easily detached from the mold parts , if these are separated from each other immediately after their elastic deformation.
  • This method can in principle also be carried out on the known casting installation described at the outset, provided that the frame and associated hydraulic cylinders are dimensioned sufficiently strong to elastically deform the casting mold parts in the required manner. Such a dimensioning of the frame and hydraulic cylinder would increase the manufacturing costs and space requirements of the known casting installation even further.
  • the casting The system for carrying out the method according to claim 10 is particularly suitable because a single drive arranged in the demolding station, in particular the one that is already present for moving the molded part holders apart and together, is sufficient to deform the molded parts. Since this drive is arranged in a stationary manner and only needs to be present once, it can be dimensioned sufficiently strong without requiring any special effort.
  • Fig. 1 is a plan view of a casting machine according to the invention
  • Fig. 2 is a side view of the casting machine in the direction of
  • FIG. 3 shows an enlarged section from FIG. 2
  • FIG. 4 shows an enlarged section from FIG. 1
  • FIG. 5 shows an enlarged section from FIG. 4.
  • the casting installation shown has a turntable 10 which is mounted on a base frame 12 so as to be rotatable about a central vertical axis A.
  • a drive (not shown) of the type customary in rotary tables, with which the rotary table 10 can be rotated step by step by 45 °.
  • eight pivot bearings 14 are arranged at regular circumferential intervals, each defining a horizontal axis B which is tangential with respect to the turntable.
  • a first molded part holder 16 is mounted on each of the swivel bearings 14 in such a way that it can be swiveled outwards from a casting position in which it rests on the rotary table by at least 90 ° into a demolding position.
  • Each first molded part holder 16 is assigned a second molded part holder 18.
  • the molded part holders 16 and 18 are locked together in pairs, as shown in FIG. 1 for seven of a total of eight pairs of molded part holders 16, 18.
  • the eighth pair of molded part holders 16, 18 is shown in FIGS. 1 and 2 in the demolding position and in an exploded state.
  • a container 20 which contains casting slip and can be pressurized.
  • a first mold part 22 is fastened to each of the first mold part holders 16, while a second mold part 24 is fastened to each of the second mold part holders 18.
  • Each pair of casting mold parts 22 and 24 forms a casting mold which, in the example shown, is designed for casting wash basins, as indicated by dashed lines in FIG. 3.
  • casting cores can be arranged between associated casting mold parts.
  • the mold parts 22 and 24 are connected to the container 20 by a hose 26 and 28, respectively.
  • a demolding station 30 is arranged at a point which is reached once by each of the casting molds 22, -24, and has a frame 32 with a shelf 34 in the form of a roller conveyor arranged at the height of the turntable 10. Lateral stands 36 and 38 protrude from the frame 32.
  • the pair of molded part holders 16 and 18 are locked together in such a way that they keep the associated mold parts 22 and 24 tightly clamped together.
  • four sleeves 40 are fastened to each of the first molded part holders 16, each extending along an axis C parallel to the associated pivot axis B and each guiding a bolt-like first clamping body 42 axially displaceably.
  • the first clamping bodies 42 are aligned with a second clamping body 44, which is also axially displaceably guided in the associated second molded part holder 18.
  • the first clamping body 42 have in the example shown, one threaded bore 46 each, into which a threaded pin 48 formed on the associated second clamping body 44 fits.
  • the first clamping bodies 42 are prevented from rotating, in the illustrated example by a radial pin 50 which engages in an elongated hole 52 of the associated sleeve 40.
  • Each of the first clamping bodies 42 is prestressed in the direction away from the associated second clamping body 44.
  • a spring 54 is clamped between a spring plate 56 fastened to the relevant first clamping body 42 and the associated first molded part holder 16; in the example shown, the spring 54 is a helical compression spring.
  • the axial freedom of movement of each of the first clamping bodies 42 is limited, on the one hand, by the associated spring plate 56 and, on the other hand, by a locking ring 58, which cooperate with one end face of the associated sleeve 40.
  • the first clamping body 42 can be moved against the resistance of the associated spring 54 in the direction of the associated second clamping body 44.
  • a drive 60 in the form of a pneumatic cylinder which acts with a piston rod 62 on the spring plate 56 of the associated first clamping body 42, is supported in the demolding station 30 on the first lateral stand 36 for each first clamping body 42.
  • Each of the second clamping bodies 44 is prestressed in the direction of the associated first clamping body 42.
  • each of the second clamping bodies 44 is assigned a spring 64, in the example shown again a helical compression spring, which is clamped between a support ring 66 fastened to the relevant second clamping body 44 and the associated second molded part holder 18.
  • Each of the second clamping bodies 44 has a hexagon head 68, which normally rests against the back of the second molded part holder 18 under the pretension of the spring 64.
  • four drives 70 for example electric or compressed air motors, are attached to the second lateral stand 38, each one of the are assigned to second clamping bodies 44 and each with a socket wrench 72 matching its hexagon head 68. are equipped.
  • the first molded part holder 16 is prevented from moving in the direction of the axis B by the swivel bearing 14 of the pair of molded part holders 16 and 18 which are in the demolding station 30 and are pivoted into the demolding position.
  • an essentially plate-shaped support body 74 is provided in the demolding station, which is guided by means of a pair of guide rods 76 which are fastened to it and parallel to the pivot axis B in guides 78 which are fastened to the second lateral stand 38 .
  • a drive 80 in the form of a hydraulic cylinder, the piston rod 82 of which is connected to the support body 74, is also fastened to the second side stand 38.
  • the latter On its side facing the second molded part holder 18, the latter has fastening means 84, for example magnets, which automatically connect it to the second molded holder 18 located in the demolding station 30.
  • a lever 86 is pivotally mounted below the shelf 34 about an axis D, which extends parallel to the pivot axis B of the pair of molded part holders 16, 18 in the demolding station 30, and thus also parallel to the axes C.
  • the lever 86 on the free end of which a roller 88 is mounted, can be moved by means of a swivel drive 90, for example in the form of an electric motor, via a self-locking worm gear 92 from the position indicated by broken lines in FIG. 3 to the position shown in full lines and vice versa.
  • a guide 94 is rigidly connected to each of the first molded part holders 16 and extends approximately radially away from the associated pivot bearing 14, downward when the associated pair of molded part holders 16, 18 are in their casting position occupies, and horizontally, radially to the axis of rotation A when the pair of molded part holders 16, 18 in question takes its demolding position.
  • Each of the guides 94 is fork-shaped, so that when the lever 86 is pivoted in the direction of the axis of rotation A, the roller 88 engages in the guide 94 of the pair of molded part holders 16, 18 which is just in front of the demolding station 30 and still has its pouring position takes.
  • a positive connection is created between the roller 88 and the guide 94; this ensures that the pair of molded part holders 16, 18 together with the molded parts 22, 24 attached to them are placed gently on the shelf 34.
  • the second clamping bodies 44 are rotated by means of the drives 70 in such a way that they separate from the first clamping bodies 72. Then the drives 60 are relieved of pressure and the drive 80 is reversed so that the piston rod 82 is retracted.
  • the support body 74 takes the second molded part holder 18 via the magnets 84, so that the molded part 24 from Mold part 22 is moved away.
  • the casting produced between these mold parts 22 and 24 is placed, for example, on a pallet, which is then moved radially away from the turntable on the shelf 34 designed as a roller conveyor.
  • the molded part holders 16 and 18 are then pushed together again by extending the piston rod 82 of the hydraulic drive 80 and the pneumatic drives 60 are pressurized again so that their piston rods 62 extend and move the first clamping bodies 42 in the direction of the second clamping bodies 44. These are then rotated by their drives 70 in the screwing direction, so that the threaded pins 48 penetrate into the threaded holes 46.
  • the axial forces that occur are limited by the springs 64 in such a way that the screw threads are hardly loaded during screwing in.
  • the pneumatic drives 60 are depressurized so that their piston rods 62 retract under the action of built-in return springs, and the hydraulic drive 80 is reversed so that its piston rod 82 has the adhesive force the magnet 84 overcomes and pulls the support body 74 together with the drives 70 attached to it away from the second molded part holder 18.
  • the socket wrench detaches from the hexagon heads 68 of the second clamping bodies 44.
  • the molded part brackets 16, 18 braced in this way and now exposed together with the mold parts 22 and 24 clamped between them are now pivoted back into the casting position, saving space between adjacent pairs of molded part holders 16, 18 together with the associated mold parts 22, 24 come to stand on the turntable 10.
  • the rotary table is then rotated one step further, and the described demolding cycle is repeated with the next pair of molded part holders 16, 18, while the previously emptied mold 22, 24 is filled with slip via the hoses 26, 28 and this is pressurized.

Abstract

Plusieurs premiers supports de pièce moulée (16) destinés chacun à une première pièce moulée (22) sont montés décalés les uns par rapport aux autres dans le sens périphérique d'une table (10) qui peut tourner pas à pas autour d'un pivot (A), et sont disposés de manière à pivoter autour d'un axe de pivotement (B). Un nombre correspondant de seconds supports de pièce moulée (18) destinés chacun à une seconde pièce moulée (24) sont disposés sur la table rotative (10) et peuvent chacun être rapprochés ou éloignés d'un premier support de pièce moulée (16) correspondant, afin de réunir ou de séparer les pièces moulées (22, 24) correspondantes. Un poste de démoulage (30) situé à côté de la table rotative (10) est pourvu d'un mécanisme d'entraînement en pivotement (90) destiné à faire basculer en va-et-vient une paire de supports de pièce moulée (16, 18) entre une position de moulage et une position de démoulage. Des éléments de tension (42, 44) sont montés sur les supports de pièce moulée (16, 18) conjointement avec eux, de manière à pivoter autour de l'axe de pivotement (B) et peuvent être bloqués et débloqués par paire, par actionnement extérieur. Les mécanismes d'entraînement (60, 70, 80) destinés à actionner les éléments de tension (42, 44) qui éloignent et rapprochent les supports de pièce moulée (16, 18) de chaque paire de supports pour les mettre en position de démoulage, ne se trouvent que dans le poste de démoulage (30).
EP94923733A 1993-07-22 1994-07-13 Installation de moulage et procede de moulage sous pression de pieces ceramiques Expired - Lifetime EP0662027B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4324684A DE4324684C1 (de) 1993-07-22 1993-07-22 Gießanlage und Verfahren zum Druckgießen keramischer Gußstücke
DE4324684 1993-07-22
PCT/EP1994/002308 WO1995003160A1 (fr) 1993-07-22 1994-07-13 Installation de moulage et procede de moulage sous pression de pieces ceramiques

Publications (2)

Publication Number Publication Date
EP0662027A1 true EP0662027A1 (fr) 1995-07-12
EP0662027B1 EP0662027B1 (fr) 1998-03-04

Family

ID=6493485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94923733A Expired - Lifetime EP0662027B1 (fr) 1993-07-22 1994-07-13 Installation de moulage et procede de moulage sous pression de pieces ceramiques

Country Status (4)

Country Link
EP (1) EP0662027B1 (fr)
CN (1) CN1112780A (fr)
DE (2) DE4324684C1 (fr)
WO (1) WO1995003160A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0609297D0 (en) * 2006-05-11 2006-06-21 Pcl Ceramics Ltd Pressure casting apparatus, system and methods
CN102416663B (zh) * 2011-12-06 2013-08-14 惠达卫浴股份有限公司 一种微压陶瓷成型机
PL3126111T3 (pl) 2014-03-31 2020-03-31 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Maszyna do produkcji produktów ceramicznych
CN106584668A (zh) * 2015-10-17 2017-04-26 佛山市恒洁卫浴有限公司 双层直角旋转定位模具车
CN109808044B (zh) * 2019-03-22 2024-01-23 福建信息职业技术学院 圆柱体混凝土砌块成型机及成型方法
CN113601680B (zh) * 2021-08-06 2023-08-18 蓬莱华安铸石管件有限公司 一种浇铸成型设备和浇铸成型方法
CN116476195B (zh) * 2023-06-08 2023-10-13 广东吉玉陶瓷股份有限公司 一种智能手表陶瓷注射成型工艺及装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1168662A (en) * 1965-11-04 1969-10-29 Elastomer Ag Injection Moulding Machine.
FR1464295A (fr) * 1965-12-30 1966-12-30 Zentralinstitut Fuer Fertigung Procédé et dispositif pour fabriquer des enveloppes isolantes de tubes
FR1536011A (fr) * 1967-09-05 1968-08-09 Dispositif d'ouverture et de fermeture de moule pour machines de remplissage de moules, notamment pour machines à mouler par injection
GB1295056A (fr) * 1970-03-17 1972-11-01
DE2458778C3 (de) * 1973-12-17 1980-11-06 Ifoe Ab, Bromoella (Schweden) Vorrichtung zum Schlickergießen von keramischen Gegenständen
WO1991010545A1 (fr) * 1990-01-18 1991-07-25 Kawasaki Steel Corporation Appareil de moulage sous haute pression
DE4206279C1 (fr) * 1992-02-28 1993-04-22 Erich Netzsch Gmbh & Co Holding Kg, 8672 Selb, De
DE4220949C2 (de) * 1992-06-26 2001-06-21 Sama Maschb Gmbh Vorrichtung zum Gießen hohler keramischer Formlinge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9503160A1 *

Also Published As

Publication number Publication date
CN1112780A (zh) 1995-11-29
DE4324684C1 (de) 1994-09-15
DE59405386D1 (de) 1998-04-09
EP0662027B1 (fr) 1998-03-04
WO1995003160A1 (fr) 1995-02-02

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