EP0203333B1 - Verfahren zur Herstellung von Formen, Modellen und Werkzeugen auf Hartgips- und/oder Zementbasis - Google Patents

Verfahren zur Herstellung von Formen, Modellen und Werkzeugen auf Hartgips- und/oder Zementbasis Download PDF

Info

Publication number
EP0203333B1
EP0203333B1 EP86105033A EP86105033A EP0203333B1 EP 0203333 B1 EP0203333 B1 EP 0203333B1 EP 86105033 A EP86105033 A EP 86105033A EP 86105033 A EP86105033 A EP 86105033A EP 0203333 B1 EP0203333 B1 EP 0203333B1
Authority
EP
European Patent Office
Prior art keywords
weight
wet
process according
cement
primary 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
Application number
EP86105033A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0203333A2 (de
EP0203333A3 (en
Inventor
Fritz Fässle
Neville Henry Clubbs
Siegmund Stadler
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.)
BK Giulini GmbH
Original Assignee
Giulini Chemie GmbH
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 Giulini Chemie GmbH filed Critical Giulini Chemie GmbH
Publication of EP0203333A2 publication Critical patent/EP0203333A2/de
Publication of EP0203333A3 publication Critical patent/EP0203333A3/de
Application granted granted Critical
Publication of EP0203333B1 publication Critical patent/EP0203333B1/de
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • 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
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement

Definitions

  • the present invention relates to a process for the production of molds, models and tools from glass fiber reinforced hard plaster and / or glass fiber reinforced cement, in particular molds, models and tools for the automotive, aircraft and shipbuilding industries and the sanitary sector.
  • fiberglass-reinforced materials are composite materials, which are the materials that are created by incorporating a basic material in the form of particles, whiskers, fibers, lamellas or braids into a second material - the matrix.
  • cement is used, for example, in the construction sector.
  • Their use in laminates in the production of molds, models and tools is not known.
  • plastic molds made of glass fiber reinforced epoxy resins or unsaturated polyester resins can also be used, light molds being provided with stiffening ribs.
  • the molds are backed with more stable materials, e.g. B. with mixtures of epoxy resin and quartz sand.
  • Plastic molds are inexpensive compared to steel molds and are a useful addition to the economical production of prototypes.
  • Gypsum molds have probably not been used in this area until now because their strength is too low due to their high porosity and the expansion is too high. As a result, their dimensional accuracy and their ability to be demolded are inadequate.
  • European patent application 0 124 801 and German patent 77 796 describe the production of molds based on beta calcium sulfate hemihydrate and / or cement. It is characteristic of this and other known processes, however, that only porous forms are created which absorb moisture and are gas-permeable. The mechanical properties of such molds do not meet the requirements imposed in vehicle and aircraft construction, even if particles are embedded in the castable molding compounds; e.g. B. whiskers, glass fibers, etc., so that porous composite materials based on gypsum or cement are formed.
  • cement-based moldings are produced in such a way that first a liquid resin layer, consisting of epoxy resin and hardener, is cooled in a mold to at least 30 ° C., and then a cement-containing layer on the viscous resin layer is poured. It is essential in this process that both layers solidify at the same time and thereby firmly bond to one another. Moldings produced in this way have a surface layer made of synthetic resin on the cement-containing base layer. However, this method is also unsuitable for the production of molds for large components or models.
  • the object is achieved according to the invention in that at least one base layer of a binder is applied to the model to be molded and provided with a release agent, onto which a glass-fiber-reinforced molding composition, consisting of 95 to 0% by weight, is wet-on-wet. alpha calcium sulfate hemihydrate, 0 to 95 wt .-% cement, 0.5 to 8 wt .-% glass fibers and 0.5 to 4 wt .-% leveling agent and water, is applied, and the laminate formed is removed after setting .
  • the weight percentages above relate to the dry molding composition.
  • the water content of the molding compound is expediently chosen so that a kneadable compound suitable for backfilling molds made of plaster or plastics is produced.
  • the water content will be between 20 and 28% by weight, in particular 22 and 26% by weight, based on the dry mixture, but the subject matter of the invention is not restricted to the stated amounts of water.
  • the water / gypsum factor or water / cement factor is close to the stoichiometrically necessary water requirement, so that dense forms are created, the mechanical properties of which are further improved by the glass fiber content.
  • At least one base layer of a binder is applied to the model coated with release agent, but preferably two are applied.
  • the base layers are best applied to the separating layer, for example a layer of hard wax, with a brush, the first layer being approximately 0.1 to 5 mm thick and the second, which is used for reinforcement, 1 to 6 mm. It is essential here that the base layers are applied "wet on wet", ie the setting process of the layer already applied when the next layer is brushed on Shift is not yet finished. This is the only way to ensure good adhesion between the layers of the laminate. If the setting process has already been completed, an adhesive agent must be used.
  • the binder of the base layers can be an epoxy surface resin.
  • the dry alpha-calcium sulfate hemihydrate and / or cement-containing molding compound which has not yet been mixed with glass fibers can also be used as a binder, which is then mixed with a little more water than the molding compound and thus becomes spreadable.
  • the amount of water added can e.g. B. between 26 and 31 wt .-%, based on the dry weight of the binder.
  • the second base layer essentially serves to reinforce the first base layer, which is suitable for molding difficult contours and makes it possible to produce shapes with smooth surfaces.
  • the glass fiber content of the molding composition is preferably between 2 and 4% by weight. Due to the glass fiber reinforced molding compound, the molded parts are backed in such a way that they can withstand even the heaviest loads, in particular higher pressures.
  • the glass fiber length should be 4 to 12 mm, in particular 5 to 8 mm, the diameter about 10 to 15 ⁇ m.
  • the molding compound containing glass fiber can also be applied "wet on wet" to the last base layer. Using an adhesion promoter, the molding compound can also be applied to the set base layer, but also in the wet-on-wet process.
  • the average grain size of the calcium sulfate hemihydrate crystals and the cement particles is preferably between 15 and 30 j..lm.
  • Adjustment means are understood here as mixtures which contain accelerators, retarders and plasticizers, possibly also pH regulators and expansion regulators.
  • Epo S 1, SW 404, SV 410 and SV 414 are suitable, for example.
  • Suitable adhesion promoters can be gypsum adhesives consisting of approximately 95% by weight alpha-calcium sulfate hemihydrate, 0.5-2% by weight adjusting agent and 1 to 4 5% by weight of polyvinyl acetate (EPV). This mixture also contains 20 to 28% by weight of water, based on the dry adhesive mixture.
  • the last base layer consists of an epoxy surface resin that has already set, an adhesion promoter must be applied after this layer has been roughened, to which the molding composition according to the invention is then applied in a wet-on-wet process.
  • An epoxy surface resin which can be identical to that of the base layer, can be applied here as an adhesion promoter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP86105033A 1985-05-30 1986-04-11 Verfahren zur Herstellung von Formen, Modellen und Werkzeugen auf Hartgips- und/oder Zementbasis Expired EP0203333B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3519367 1985-05-30
DE19853519367 DE3519367A1 (de) 1985-05-30 1985-05-30 Verfahren zur herstellung von formen, modellen und werkzeugen auf hartgips - und/oder zementbasis

Publications (3)

Publication Number Publication Date
EP0203333A2 EP0203333A2 (de) 1986-12-03
EP0203333A3 EP0203333A3 (en) 1987-07-22
EP0203333B1 true EP0203333B1 (de) 1989-09-13

Family

ID=6271994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105033A Expired EP0203333B1 (de) 1985-05-30 1986-04-11 Verfahren zur Herstellung von Formen, Modellen und Werkzeugen auf Hartgips- und/oder Zementbasis

Country Status (5)

Country Link
US (1) US4749431A (enrdf_load_stackoverflow)
EP (1) EP0203333B1 (enrdf_load_stackoverflow)
CA (1) CA1282578C (enrdf_load_stackoverflow)
DE (2) DE3519367A1 (enrdf_load_stackoverflow)
ES (1) ES8801142A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4036302A1 (de) * 1990-11-14 1992-05-21 Reinhard Treudler Baugruppentraeger

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3812634A1 (de) * 1988-04-15 1989-10-26 Sued Chemie Ag Verfahren zur herstellung von giessformen aus tongebundenem formsand
EP0339183A3 (de) * 1988-04-29 1990-08-29 Giulini Chemie GmbH Neue, zur Herstellung von mit Wasser auswaschbaren Kernen und Formen geeignete keramische Mischungen
DE4012044A1 (de) * 1990-04-13 1991-10-17 Heidelberger Zement Ag Verfahren zur herstellung von formen, modellen und werkzeugen zur formgebung
EP0467025A3 (en) * 1990-07-20 1992-12-09 Giulini Chemie Gmbh Light moulds, patterns and tools on gypsum base
US5176195A (en) * 1990-10-03 1993-01-05 Kurty Eugene J High permeability metal casting plaster and method of making same
US5164004A (en) * 1990-10-03 1992-11-17 Kurty Eugene J High permeability metal casting plaster and method of making same
US5264175A (en) * 1991-08-12 1993-11-23 Bush Byron V Method for making three dimensional impressions
MX9301379A (es) * 1993-03-12 1994-06-30 Fernandez Garcia Carlos J Composicion de cemento para modelar.
ES2161621B1 (es) * 1999-09-01 2002-06-16 Herrera Vicente Requena Procedimiento de fabricacion de moldes para la construccion.
ES2181582B1 (es) * 2001-03-16 2004-06-01 Juan Manera Llado Procedimiento para moldeado de estructuras hormigonadas.
KR100807761B1 (ko) 2007-04-27 2008-02-28 주식회사 콘크리닉 알파형반수석고를 이용한 시멘트조성물 및 이를 이용한시공방법
US8989905B2 (en) * 2007-06-19 2015-03-24 Verifi Llc Method and system for calculating and reporting slump in delivery vehicles
CN106945167A (zh) * 2017-01-19 2017-07-14 刘文华 一种夹芯板材的制作方法
CN110843085A (zh) * 2019-11-29 2020-02-28 航天特种材料及工艺技术研究所 一种石膏模具的制造方法及利用其制作熔融石英陶瓷天线罩的方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE77796C (de) * J. J. CH. SMITH, Passaio, New-Jersey, V. St. A Formmaterial für Metallgufs
NL6514788A (enrdf_load_stackoverflow) * 1965-11-15 1967-05-16
DE2217587A1 (de) * 1972-04-12 1973-10-31 Emil Lupp Fa Werkstoff fuer giessereimodelle
GB1466772A (en) * 1974-08-07 1977-03-09 Low J Castings of articles containing calcined gypsum
GB1521030A (en) * 1974-12-23 1978-08-09 Nat Res Dev Cementitious composites
JPS52127919A (en) * 1976-04-19 1977-10-27 Mitsubishi Chem Ind Production of lighttweight plaster moldings
JPS5849179B2 (ja) * 1977-05-16 1983-11-02 日本国有鉄道 弾性被覆を有する軌道スラブの製造方法
DD206966A1 (de) * 1982-01-11 1984-02-15 Siegfried Reuss Verfahren und haftbruecken zur herstellung beschichteter bauelemente
DE3316571C2 (de) * 1983-05-06 1985-08-22 Giulini Chemie Gmbh, 6700 Ludwigshafen Verfahren zur Herstellung von Präzisionsgießformen nach dem Gips - Formverfahren, Gießform und deren Verwendung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4036302A1 (de) * 1990-11-14 1992-05-21 Reinhard Treudler Baugruppentraeger

Also Published As

Publication number Publication date
DE3665548D1 (en) 1989-10-19
ES555526A0 (es) 1987-12-16
US4749431A (en) 1988-06-07
ES8801142A1 (es) 1987-12-16
EP0203333A2 (de) 1986-12-03
DE3519367A1 (de) 1986-12-04
EP0203333A3 (en) 1987-07-22
DE3519367C2 (enrdf_load_stackoverflow) 1990-05-23
CA1282578C (en) 1991-04-09

Similar Documents

Publication Publication Date Title
EP0203333B1 (de) Verfahren zur Herstellung von Formen, Modellen und Werkzeugen auf Hartgips- und/oder Zementbasis
DE3520300A1 (de) Verfahren zur herstellung von porenbeton
DE102004014806A1 (de) Schichtweise aufgebautes Bauteil und Verfahren zu dessen Herstellung
DE69313522T2 (de) Offenzelliges, poröses Material, Verfahren zu seiner Herstellung und Form zum Druck-Giess-Formen von keramischen Artikel aus diesem Material
DE2928582C2 (de) Reflektor für Kraftfahrzeugscheinwerfer sowie Verfahren zu seiner Herstellung
DE1683820C2 (de) Verfahren zum Herstellen eines Baufertigteils mit einem Grundkörper aus Porenbeton und einer Au Benschicht
EP0303071B1 (de) Fugenfüller
EP0151930A2 (de) Verfahren zum Herstellen eines Rohrstückes und danach hergestelltes Verbundrohr
DE69209719T2 (de) Materialien für poröse Formen, ihre Herstellung und ihre Verwendung zum Formen von keramischen Produkten
DE2021532C3 (de) Werkstoff zur Herstellung von saugfähigen Arbeitsformen für keramische Erzeugnisse
DE69503979T2 (de) Zementmörtelzusammensetzung und daraus hergestellte Gegenstände
DE3225707A1 (de) Formmasse aus hydraulischen bindemitteln und polymerfibrillen
DE3503855C2 (enrdf_load_stackoverflow)
EP0308927B1 (de) Formteile, insbesondere für Kraftfahrzeuge
EP0467025A2 (de) Leichtgewichtige Formen, Modelle und Werkzeuge auf Gipsbasis und Verfahren zu ihrer Herstellung
DE2701363C2 (de) Formen auf Basis Calcium-Silikat-Hydrat zur Herstellung von Formteilen aus verschäumbaren Kunststoffen
DE3307927A1 (de) Stellmittelgemisch als zusatz zum calciumsulfathalbhydrat zur herstellung von arbeitsformen fuer die keramische und sonstige formgebende industrie sowie fuer hobbyzwecke
DE2008039A1 (de) Verfahren zur Herstellung von kunststoffüberzogenen Pormkörpern aus Zement oder Beton
DE2534451A1 (de) Kunstharzhaltige kleb- oder bindemittel und kleb-, binde- und beschichtungsverfahren sowie formkoerperherstellung
DE2163669C2 (de) Verfahren zum Herstellen von Formen mit einer Vielzahl feiner offener Poren insbesondere zur Erzeugung keramischer Gegenstände
AT213066B (de) Verfahren zur Herstellung von verstärktem Material aus synthetischen Harzen, enthaltend Epoxy- und Polyesterharze
EP0321445A2 (de) Zusatzstoff zu Anhydrit enthaltenden Baustoffmischungen
DE1912900C2 (de) Verfahren zum Spachteln von Betonwerkstein
DD146581A2 (de) Kunstharzverguetetes calciumsulfat-bindemittel
DE3832711A1 (de) Verfahren zur herstellung von spritzbeton

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): BE DE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19870706

17Q First examination report despatched

Effective date: 19881026

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT NL SE

REF Corresponds to:

Ref document number: 3665548

Country of ref document: DE

Date of ref document: 19891019

ET Fr: translation filed
ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
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

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

Ref country code: DE

Payment date: 19920213

Year of fee payment: 7

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

Ref country code: GB

Payment date: 19920403

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: 19920416

Year of fee payment: 7

Ref country code: BE

Payment date: 19920416

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: 19920427

Year of fee payment: 7

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19920430

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: 19930411

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

Ref country code: SE

Effective date: 19930412

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

Ref country code: BE

Effective date: 19930430

BERE Be: lapsed

Owner name: GIULINI CHEMIE G.M.B.H.

Effective date: 19930430

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

Ref country code: NL

Effective date: 19931101

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

Effective date: 19930411

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19931229

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

Ref country code: DE

Effective date: 19940101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 86105033.4

Effective date: 19931110

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: 20050411