EP0389234B1 - Flüssigkeitsdichte Schlickerguss-Formen und Verfahren zu deren Herstellung - Google Patents

Flüssigkeitsdichte Schlickerguss-Formen und Verfahren zu deren Herstellung Download PDF

Info

Publication number
EP0389234B1
EP0389234B1 EP19900302956 EP90302956A EP0389234B1 EP 0389234 B1 EP0389234 B1 EP 0389234B1 EP 19900302956 EP19900302956 EP 19900302956 EP 90302956 A EP90302956 A EP 90302956A EP 0389234 B1 EP0389234 B1 EP 0389234B1
Authority
EP
European Patent Office
Prior art keywords
mold
filter
mating
layer
material layer
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.)
Expired - Lifetime
Application number
EP19900302956
Other languages
English (en)
French (fr)
Other versions
EP0389234A3 (de
EP0389234A2 (de
Inventor
Kuniyoshi C/O Enokido Kojo Kohmura
Takeshi C/O Enokido Kojo Ito
Kazushige C/O Enokido Kojo Murata
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.)
Inax Corp
Original Assignee
Inax Corp
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 Inax Corp filed Critical Inax Corp
Publication of EP0389234A2 publication Critical patent/EP0389234A2/de
Publication of EP0389234A3 publication Critical patent/EP0389234A3/de
Application granted granted Critical
Publication of EP0389234B1 publication Critical patent/EP0389234B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B28B7/0011—Mould seals
    • 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
    • B28B1/261—Moulds therefor

Definitions

  • This invention relates to a liquid-tight mold for cast-molding a slip under pressure to facilitate deposition of the slip, and a method for producing the mold. More particularly, this invention relates to improvement of conventional molds in increasing liquid-tight properties of the molds, enhancing performance of cast-molding operation, and preventing such molds from breaking.
  • GB-A-792351 discloses a mold for casting a slip under pressure substantially as indicated in the preamble of claim 1. It also discloses a method for producing such a mold substantially as indicated in the preamble of claim 8.
  • an object of the present invention is to provide a novel mold for cast-molding a slip under pressure, wherein the above-mentioned problems in conventional casting molds are eliminated by the use of both a resilient material layer and a sealing material layer in combination.
  • Another object of the invention is to provide a method for producing the mold.
  • the present inventors have found that such problems can be eliminated by providing the conventional divisible mold comprising mating filter layers with a sealing material layer at least on a mating filter surface of at least one mold portion to be mated and a resilient material layer at least on a part of the sealing layer or another mating filter surface.
  • a mold for cast-molding a slip under pressure which comprises a divisible casting mold including at least two mold portions to form a slip-depositing mold cavity when mated together; each mold portion comprising an air-tight housing and a filter layer of continuously porous structure inside of the housing; a slip supply duct being connected with said mold cavity and communicated with the outside of the housing; and wherein a sealing material layer is attached onto at least the whole mating filter surface of at least one mold portion to be mated: characterized in that a resilient material layer is attached onto one of the sealing material layer and another mating filter surface, along slip-depositing divisible surfaces of the filter layers, whereby the mold portions mated together are provided with a resilient liquid-tight zone between the mating filter surfaces.
  • the invention also provides a method for producing a mold as defined above, which comprises coating at least the whole mating filter surfaces of at least one mold portion to be mated, with a sealing compound; applying a releasing material between the mating mold portions, mating the mold portions, and hardening the sealing compound to provide a sealing material layer; and characterized by then bonding a resilient material sheet onto one of the resulting sealing material layer and another mating filter surface, along slip-depositing divisible surfaces of the filter layers, whereby the mold portions mated together are provided with a resilient liquid-tight zone between the mating filter surfaces.
  • Fig. 1 shows an enlarged cross-sectional view of the essential part of a mold according to the present invention.
  • Fig. 2 shows a side cross-sectional view of a conventional mold.
  • Fig. 3 shows a side cross-sectional view of another mold according to the present invention.
  • Fig. 4 is an enlarged cross-sectional view of the part IV in Fig. 3.
  • the air-tight housing can comprise a reinforcing housing 4 for the mold and a supporting layer for the filter layer installed between the housing and the filter layer.
  • the filter layer in each mold portion can include therein fluid-flowing conduits 7 connected with a fluid-flowing duct to communicate with the outside of the housing.
  • the fluid-flowing conduits 7 normally comprise curved porous cords or tubes arranged along the shape of the mold cavity 18, and/or straight blind holes installed towards the mold cavity 18.
  • the thin resilient material layer 10 employed in the present invention unexpectedly serves to give a durable liquid-tight zone 14 between the mated filter surfaces 16 of the mold, to hold and sink possible foreign matter pieces in the resilient layer, and to give a small clearance between the mated filter surfaces and protect the filter surfaces from fracture due to the foreign matter pieces.
  • the thickness of the resilient layer 10 is generally selected to hold and sink possible foreign matter pieces therein and not to substantially deteriorate uniform filtering performance of the slip-depositing surfaces.
  • the width and elasticity of the resilient layer is generally selected to be readily compressed by relatively weak clamping force of the mating mold portions.
  • the thin sealing material layer 11 in the present invention serves to protect the mating filter surfaces, to correct the surface conditions of the mating mold portions, to give air-tight properties to the mating filter surfaces for facilitating suction and pressurization of the filter layers, and to give good bonding properties with the resilient layer 10 to the mating filter layer.
  • the thickness of the sealing layer 11 is generally selected to firmly adhere to the mating filter layer and not to substantially deteriorate uniform filter performance of the slip-depositing surfaces 12.
  • the sealing material layer 11 may be attached onto one or both of the whole mating filter surfaces 16 of the mold portions.
  • the sealing layer may extend onto the mating supporting layer, as necessary.
  • the thickness of the sealing layer is usually 0.1 to 8 mm, preferably 0.3 to 1 mm.
  • the sealing material can be used ordinary sealing compounds and preferably resinous sealing compounds comprising epoxy, urethane, silicone, polyester, phenol resin components, etc.
  • the sealing material may be a commercially available resinous putty compound comprising resin materials and fillers.
  • the resilient material layer 10 is attached onto at least a part of the sealing layer or another mating filter surface 16 of a mold portion, along slip-depositing divisible surfaces 12 of the mated filter layers and preferably apart from the slip-depositing surface with a receding distance (a) of at least 1 mm.
  • the distance (a) is usually 1 to 20 mm, preferably 3 to 10 mm.
  • the filter layer is prevented from breaking and sufficient liquid-tight properties of the mold is obtained. This is because the clearance formed between the mating filter surfaces of the mold portions works to decrease the repulsive pressure of the foreign matter exerted upon the mating filter surfaces.
  • the resilient material can be used resilient rubber-like or sponge-like sheets having elasticity to form a liquid-tight zone 14 when compressed, such as non-porous silicone or urethane rubber sheets as well as polyurethane sponge sheets.
  • substantially closed cell sponge materials are used because a slip does not permeate into the porous cells and elasticity of the sponge material is maintained to provide sufficient liquid-tight properties of the mold.
  • Polyurethane or other synthetic rubber sponge materials are exemplified as a preferred sponge material.
  • the thickness of the resilient layer is usually 0.2 to 5 mm, and preferably 0.3 to 3mm.
  • the width (b) of the resilient layer is usually about 3 to 100 mm, preferably 4 to 50 mm.
  • the resilient layer may cover a mating mold surface ranging from a part of the mating filter surface to both the mating filter surface and mating supporting layer surface.
  • the resilient layer 10 can be bonded onto the sealing layer 11 or another mating filter surface with an adhesive.
  • Epoxy or urethane resin adhesives are generally used as a preferred adhesive.
  • FIG. 2 A cross-sectional view of a conventional casting mold is shown in FIG. 2.
  • Mold 1 is for cast-molding a wash basin, and a blank portion 18 within the mold is a mold cavity for molding the basin.
  • the mold 1 comprises a filter layer 2, a supporting layer 3, and a pressure-resistant reinforcing housing 4 in a pile from the mold cavity outwardly.
  • the mold is divisible into an upper mold portion 5 and a lower mold portion 6.
  • the filter layer 2 is generally composed of a porous synthetic resin or gypsum
  • the supporting layer 3 is generally composed of a non-porous synthetic resin or cement mortar containing sand
  • the pressure-resistant reinforcing layer 4 is generally composed of iron plates or iron frames and paint.
  • fluid-flowing conduits 7 such as porous tubes 7 for suction and drainage of water contained in a slip during cast-molding and for supplying water under pressure to form a water film on the slip-depositing surfaces 2a during demolding the molded article.
  • a slip (a slurry of mineral powder for molding green articles) is supplied via a slip-supply duct 17 to a mold cavity formed in a divisible casting mold and pressurized to drive unnecessary liquid (e.g. water) contained in the slip into the mold, whereby the mineral components deposit onto the inner surfaces 2a of the mold.
  • Remaining excess slip is drained from the mold cavity via the slip-supply duct 17 by setting the duct 17 to a gravitationally low position, when a hollow article is to be obtained. Then, the mold is divided into mold portions to take out a molded green article.
  • liquid-tight properties of the mold are sometimes lost to lead leaking of the slip in the case where (1) there is an uneven portion in the mating surfaces, (2) foreign matter such as hardened clods of the slip or fragments of the mold materials enter between the mating surfaces of the mold, or (3) the filter layer is chipped off, which sometimes occurs when the mold portions 5,6 are strongly pressed to each other with foreign matter sandwiched between the mating filter surfaces because the filter layers are porous, weak and fragile.
  • a slip-depositing surface 12 of the filter layers along the mating surfaces is chipped off, the resulting molded article suffers from a flash-like projection having a shape similar to the chipped portion and is deteriorated in surface properties thereof.
  • FIG. 1 shows an enlarged cross-sectional view of the essential part of a mold for cast-molding a slip under pressure according to the present invention.
  • the essential part corresponds to the part A in FIG. 2 showing a conventional mold.
  • the mold is divided into an upper mold portion 8 (corresponding to the portion 5 in FIG. 2) and a lower mold portion 9 (corresponding to the portion 6 in FIG. 2), which comprise supporting layers 3 and filter layers 2 of a continuously porous epoxy resin material.
  • a sealing resin layer 11 is attached onto the mating surface of the lower mold portion 9, and the sealing resin layer 11 is not provided on the mating surface of the upper mold portion 8.
  • the sealing layer 11 is produced with an epoxy resin putty compound.
  • the sealing layer 11 is formed, for example, by coating the mating surface of the lower mold portion 9 with the epoxy resin sealing compound about 0.6 mm in thickness and applying a release agent (e.g. silicone or wax) onto the mating surface of the upper mold portion 8, and then mating the mold portions 8 and 9 to harden the resinous compound.
  • a release agent e.g. silicone or wax
  • the mating surface patterns of the upper mold portion 8 are transfered to the surface of the resulting hardened resin layer on the lower mold portion. After the resinous compound is substantially hardened, the mated mold portions, 8 and 9 are separated.
  • the resinous sealing layer about 0.5 mm thick can be readily separated from the mating surface of the upper mold portion 8 and is firmly adhered to that of the lower mold portion 9.
  • the sealing compound somewhat permeates into the filter layer and supporting layer, and then hardens to firmly adhere thereto.
  • the fins can be cut off after the resinous compound is hardened.
  • a resilient material layer 10 is attached onto the resinous sealing layer 11 installed on the mating filter surface 16 of the lower mold portion 9.
  • a polyurethane sponge sheet is used as the resilient material.
  • the resilient material layer 10 is about 15 mm in width (b) and about 1.5 mm in thickness.
  • the resilient material layer 10 is adhered onto the sealing layer 11 with an epoxy resin adhesive at a position about 6 mm apart from the slip-depositing surfaces 12 of the mold portions.
  • the both mold portions 8 and 9 mated together may provide some liquid-tight properties of the mold because the resinous sealing layer 11 is sandwiched between the mating surfaces 15,16 of the mold portions 8 and 9. Moreover, since the resilient material layer 10 is provided on one of the mating surfaces, the mating surfaces of the mold portions 8 and 9 mate together to form a liquid-tight zone 14, even when the mating position of these mold portions 8 and 9 is slightly slipped off.
  • FIGS. 3 and 4 show another embodiment of the present invention, in which a supporting layer 3 is not employed and a filter layer 2 directly contacts a pressure-resistant reinforcing housing 4.
  • the materials of the sealing layer 11 and resilient layer 10 used herein are the same as in Example 2.
  • the sealing layer 11 is about 0.5 mm thick.
  • the casting mold according to Example 3 brings about substantially the same effects as in Example 2, because the mold does not need a large clamping force when mating the mold portions and the filter layers are durable without the supporting layers.
  • a sealing layer 11 is attached onto the whole mating surface of a mold portion in Examples 2 and 3, it is possible to form a sealing layer 11 only on the mating surface of the filter layer 2 or on the whole mating filter layer surface and a part of the supporting layer surface. Moreover, a sealing layer 11 may be attached onto the both mating surfaces of the mold portions, as necessary.
  • the present invention is explained by way of examples for molding a wash basin to be built in a washing stand, which employ an upper mold portion and a lower mold portion.
  • the invention is not restricted to such a mold including two mold portions, and is applicable, for example, to a mold for cast-molding other articles such as stool sanitary ware which employs an upper mold portion, a lower mold portion and a side mold portion(s), and as necessary core mold pieces.
  • the sealing layers and resilient layers are provided between the respective mating surfaces of these mold portions.
  • pressurization of the slip is generally at least 0.5 Kg/sq.cm (5MPa) and normally 1 Kg/sq.cm (10MPa) of gauge or more.
  • the slip is pressurized to 10 ⁇ 100 MPa to facilitate deposition thereof.
  • the repulsive pressure of the foreign matter exerted upon the mated filter layers 2 will be decreased by the resilient layer 10 sandwiched between them, thereby preventing the mating filter surfaces from breaking. Namely, in the case where the foreign matter is located on the resilient layer 10, the foreign matter sinks in the resilient layer 10 upon mating the mold portions 8 and 9. Thus, by the elasticity of the resilient layer 10, liquid-tight properties at the mating surfaces of the mold portions 8 and 9 can be retained and the repulsive pressure of the foreign matter upon the mated filter layers 2 will be decreased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (10)

  1. Form (1) zum Formgießen eines Schlickers unter Druck, mit einer teilbaren Gießform (1) mit mindestens zwei Formteilen (5, 6) zur Bildung einer Schlickerablagerungsformhölung (18), wenn die beiden Teile zusammengesetzt sind, wobei jedes Formteil ein luftdichtes Gehäuse (4) und eine Filterschicht (2) einer kontinuierlich porösen Struktur innerhalb des Gehäuses (4) aufweist, eine Schlickerversorgungsleitung (17) mit dem Formhohlraum verbunden ist und mit der Außenseite des Gehäuses (4) in Verbindung steht und eine Dichtmaterialschicht (11) an mindestens der gesamten zusammenpassenden Filteroberfläche (15) mindestens eines zusammenzupassenden Formteils angebracht ist, dadurch gekennzeichnet, daß eine nachgiebige Materialschicht (10) auf der Dichtmaterialschicht (11) und einer weiteren zusammenpassenden Filteroberfläche (16) angebracht ist, längs schlickerablagernder teilbarer Oberflächen (12) der Filterschichten (2), wodurch die zusammengepaßten Formteile (8, 9) mit einer nachgiebigen flüssigkeitsdichten Zone (14) zwischen den zusammenpassenden Filteroberflächen (15, 16) versehen sind.
  2. Form nach Anspruch 1, in der die Schicht (10) aus nachgiebigem Material auf einer auf der zusammenpassenden Oberfläche des Formteils vorgesehenen Dichtmaterialschicht (11) angebracht ist, längs schlickerablagernder teilbarer Oberflächen (12) der Filterschichten.
  3. Form nach Anspruch 1 oder 2, bei der das luftdichte Gehäuse (4) ein Verstärkungsgehäuse für die Form und eine zwischen dem Gehäuse und der Filterschicht (2) installierte Tragschicht (3) für die Filterschicht aufweist.
  4. Form nach Anspruch 1, 2 oder 3, bei der jede Filterschicht (2) darin Fluidströmungskanäle (7) enthält und eine Fluidströmungsleitung mit den Kanälen verbunden ist und mit der Außenseite des Gehäuses (4) in Verbindung steht.
  5. Form nach einem der Ansprüche 1 bis 4, in der die nachgiebige Materialschicht in einem zurückversetzten Abstand (a) von mindestens einem Millimeter von den schlickerablagernden teilbaren Oberflächen (12) der Filterschichten vorgesehen ist.
  6. Form nach einem der Ansprüche 1 bis 5, bei der die Dicke der nachgiebigen Materialschicht (10) im wesentlichen in dem Bereich von 0,2 bis 5 mm und die Breite (b) der nachgiebigen Materialschicht im wesentlichen in dem Bereich von 3 bis 100 mm liegt.
  7. Form nach einem der Ansprüche 1 bis 6, bei der die Dicke der Dichtmaterialschicht (11) im wesentlichen im Bereich von 0,1 bis 8 mm liegt.
  8. Verfahren zum Herstellen einer Form (1) nach Anspruch 1, wobei mindestens die gesammte zusammenpassende Filteroberfläche (15) mindestens eines zusammenzupassenden Formteils (8) mit einer Dichtzusammensetzung beschichtet wird, ein Trennschichtmaterial zwischen den zusammenpassenden Formteilen (8, 9) aufgebracht wird, die Formteile zusammengepaßt werden und die Dichtzusammensetzung zur Bildung einer Dichtmaterialschicht (11) gehärtet wird, dadurch gekennzeichnet, daß dann eine Bahn (10) aus nachgiebigem Material auf eine der sich ergebenden Dichtmaterialschichten (11) und eine weitere zusammenpassende Filteroberfläche (16) gebunden wird, längs schlickerablagernder teilbarer Oberflächen (12) der Filterschichten (2), wodurch die zusammengepaßten Formteile (8, 9) mit einer nachgiebigen flüssigkeitsdichten Zone (14) zwischen den zusammenpassenden Filteroberflächen (15, 16) versehen werden.
  9. Verfahren nach Anspruch 8, bei dem die nachgiebige Materialschicht (10) auf einer auf der zusammenpassenden Oberfläche des Formteils vorgesehenen Dichtmaterialschicht (11) angebracht wird, längs schlickerablagernder teilbarer Oberflächen (12) der Filterschichten.
  10. Verfahren nach Anspruch 8 oder 9, bei dem das luftdichte Gehäuse (4) ein Verstärkungsgehäuse für die Form und eine zwischen dem Gehäuse und der Filterschicht (2) installierte Tragschicht (3) für die Filterschicht enthält.
EP19900302956 1989-03-20 1990-03-20 Flüssigkeitsdichte Schlickerguss-Formen und Verfahren zu deren Herstellung Expired - Lifetime EP0389234B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3189689U JPH0525850Y2 (de) 1989-03-20 1989-03-20
JP31896/89 1989-03-20

Publications (3)

Publication Number Publication Date
EP0389234A2 EP0389234A2 (de) 1990-09-26
EP0389234A3 EP0389234A3 (de) 1991-05-02
EP0389234B1 true EP0389234B1 (de) 1994-03-02

Family

ID=12343782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900302956 Expired - Lifetime EP0389234B1 (de) 1989-03-20 1990-03-20 Flüssigkeitsdichte Schlickerguss-Formen und Verfahren zu deren Herstellung

Country Status (4)

Country Link
EP (1) EP0389234B1 (de)
JP (1) JPH0525850Y2 (de)
DE (1) DE69006875T2 (de)
ES (1) ES2054239T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200269465A1 (en) * 2017-11-13 2020-08-27 Dorst Technologies Gmbh & Co. Kg Molding part, casting mold and a method for forming a green body

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH078166Y2 (ja) * 1990-06-28 1995-03-01 株式会社イナックス 圧力鋳込み型のシール構造

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB468641A (en) * 1936-01-17 1937-07-09 John James Improvements relating to casting moulds for clay
GB792351A (en) * 1954-12-27 1958-03-26 Shenango China Inc Dies for pressing green ceramic objects
US3993727A (en) * 1974-12-18 1976-11-23 Wallace-Murray Corporation Fluid-release mold and the method of manufacturing the same
US4181313A (en) * 1976-04-30 1980-01-01 Dowty Seals Limited Seals and gaskets
JPS56124237A (en) * 1980-03-04 1981-09-29 Toshiba Corp Method for resin sealing
JPS6331708A (ja) * 1986-07-26 1988-02-10 東陶機器株式会社 陶磁器加圧鋳込成形用型の製法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200269465A1 (en) * 2017-11-13 2020-08-27 Dorst Technologies Gmbh & Co. Kg Molding part, casting mold and a method for forming a green body
US11660778B2 (en) * 2017-11-13 2023-05-30 Dorst Technologies Gmbh & Co. Kg Molding part, casting mold and a method for forming a green body

Also Published As

Publication number Publication date
ES2054239T3 (es) 1994-08-01
JPH02121905U (de) 1990-10-04
DE69006875T2 (de) 1994-09-22
EP0389234A3 (de) 1991-05-02
JPH0525850Y2 (de) 1993-06-30
EP0389234A2 (de) 1990-09-26
DE69006875D1 (de) 1994-04-07

Similar Documents

Publication Publication Date Title
CN109124430B (zh) 整体卫浴防水底盘及其制作方法
CA1313941C (en) Mold used in pressure casting ceramic articles
ES2185745T3 (es) Procedimiento para moldear un conjunto laminado.
FR2670427A1 (fr) Procede de moulage sous vide d'un panneau en materiau plastique et panneau obtenu selon le procede.
EP0389234B1 (de) Flüssigkeitsdichte Schlickerguss-Formen und Verfahren zu deren Herstellung
US20050238856A1 (en) Decorative surface covering structure and method of forming
US6860461B1 (en) Mold for papermaking
CA2111566A1 (en) Mould for concrete block moulding machines
CN110477782B (zh) 一种对接式浴缸及对接方法
JPH0525849Y2 (de)
JPH10309711A (ja) 鋳込み成形用中子・型及びその製造方法
JP3195751B2 (ja) 水硬性材料の成形法
EP0352056A1 (de) Schlicker-Giessform
JP4047416B2 (ja) 成形プレス用クッション材及び、該クッション材を用いた板状物の製造方法
US5922260A (en) Method of making die set for forming ceramic tiles
JP3243426B2 (ja) 水硬性材料の成形法
JPH065842Y2 (ja) 泥漿鋳込み成形用型
JP2987495B2 (ja) 水硬性材料の成形法
US5714177A (en) Die set for forming ceramic tiles
JPH0525848Y2 (de)
CN2243494Y (zh) 用于混凝土表面处理的造型板
JPH047963B2 (de)
JPH069770Y2 (ja) 圧力鋳込み用成形型の漏洩防止構造
EP0919346A1 (de) Verfahren zum schnell Einrichten einer Form für die Herstellung von Gegenstände aus Ton
JPH02297304A (ja) 天板の製法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19910723

17Q First examination report despatched

Effective date: 19920619

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 69006875

Country of ref document: DE

Date of ref document: 19940407

ITF It: translation for a ep patent filed
ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2054239

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

EAL Se: european patent in force in sweden

Ref document number: 90302956.9

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960312

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960315

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19960320

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960326

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960328

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19970320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970321

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970321

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19971202

EUG Se: european patent has lapsed

Ref document number: 90302956.9

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050320