WO1979000223A1 - Procede de fabrication de modeles et de dispositifs faconnes - Google Patents

Procede de fabrication de modeles et de dispositifs faconnes Download PDF

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Publication number
WO1979000223A1
WO1979000223A1 PCT/CH1978/000031 CH7800031W WO7900223A1 WO 1979000223 A1 WO1979000223 A1 WO 1979000223A1 CH 7800031 W CH7800031 W CH 7800031W WO 7900223 A1 WO7900223 A1 WO 7900223A1
Authority
WO
WIPO (PCT)
Prior art keywords
production
models
application
sand
accelerator
Prior art date
Application number
PCT/CH1978/000031
Other languages
German (de)
English (en)
Inventor
A Ehrensperger
E Ehrensperger
Original Assignee
A Ehrensperger
E Ehrensperger
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 A Ehrensperger, E Ehrensperger filed Critical A Ehrensperger
Publication of WO1979000223A1 publication Critical patent/WO1979000223A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/54—Polycondensates of aldehydes
    • C08G18/542—Polycondensates of aldehydes with phenols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/40—Plastics, e.g. foam or rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L19/00—Erasers, rubbers, or erasing devices; Holders therefor
    • B43L19/0006—Erasers, rubbers, or erasing devices; Holders therefor motor-driven
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/16—Catalysts
    • C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
    • C08G18/20—Heterocyclic amines; Salts thereof
    • C08G18/2009—Heterocyclic amines; Salts thereof containing one heterocyclic ring
    • C08G18/2018—Heterocyclic amines; Salts thereof containing one heterocyclic ring having one nitrogen atom in the ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2875/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as mould material

Definitions

  • the invention relates to a process for the production of models and permanent molding devices with a material based on phenolic resin / polyisocyanate, in which the castings can be obtained in a very short curing time.
  • the invention relates above all to the production of models, core boxes and shaped plates, such as those produced by model carpenters. Furthermore, the material is intended for the production of injection molds and injection moldings, gauges and other production means. Castings with dielectric properties of glass fiber reinforced pressings can also be produced.
  • a pyridine compound is preferably used as the accelerator, specifically as follows:
  • a minimum proportion of the pyridine compound is advantageously already mixed into component A by the supplier. Since both the pot life and the curing time strongly depend on the temperature of the resins and are also influenced by the ambient temperature, the addition of pyridine must be adapted to the prevailing temperatures. This means that the addition of the accelerator can vary from 0.05 to 0.3%. At a temperature of 15-20 you now work with an addition of 0.3% based on part A. This addition also ensures curing of the synthetic resin in the event that an additional pyridine addition is forgotten when mixing. As a rule, however, shorter hardening times are desired, which in turn can be easily adapted to the respective piece, depending on the wishes and the given shapes. Furthermore, there is a possibility of varying the pot and curing time by adding more than 50% of either part A or part B. Fillers
  • fillers Any materials can be used as fillers. Examples include: gypsum, slate flour, ball bearing dust, metal powder, aluminum shot, sand, expanded clay, glass fibers, glass chips, wood flour, wood, Asbestos fibers, textile fibers, coal dust, mica powder, alumina etc.
  • the surface can also be enriched with metal dust for decorative purposes, for example with bronze brass tin.
  • a preferred binder composition contains about 50% of part A and about 50% of part B.
  • the mixing ratio in this case does not have to be absolutely exact. A wide spread is possible; if, for example, the mixing ratio is 50 to 50, 40 to 60 or 60 to 40 instead of 50, success is still guaranteed; While sand is the main component in mold and core production according to the Ashland patent for foundry purposes and resin is only added in smaller amounts, the proportion of phenolic resin and polyisocyanate is predominant in the new universal quick-action resin, i.e. there are concentrations of 10-100% of the resin mixture, while the filler is mixed in, in order to obtain very specific properties, such as higher or lower weight or better dielectric properties or other physical values, or simply to save material.
  • the method according to the invention has e.g. the following major advantages:
  • This resin is so simple that it can easily be used for hobbyists, as well as for the production of toys, even smaller children can handle it and make their toys, animals etc. themselves can. Due to the short curing time of the castings, for example, many models can be produced with a single negative on one working day, since it is quite possible to demold models within a few minutes.
  • the inexpensive material, the simple method of operation as well as the short pot life, which can be adjusted as required, and the short curing time make it possible, for example, to cover entire mold plates with the same model instead of mold plates.
  • the material can be poured onto it. It is not necessary to brush a surface layer beforehand, such as with other synthetic resins.
  • the first positive can be cast in the cast negative after 20 to 30 minutes. As a major plus, it can be noted that the material is practically non-shrinking compared to competing products.
  • multiple core rifles for the automatic shooting machines can be manufactured very advantageously with an order of a few hundred pieces.
  • this method can also be used to obtain injection molds for the production of thermoplastic injection moldings.
  • this material can also be used for injection molding ⁇ ⁇ itself, i.e. the same material is used both for the production of the injection mold and for the injection molding itself.
  • the use of this material for injection molds as well as for injection molded parts is intended for the production of prototypes, pilot series or small series. The advantage of this manufacturing method is clearly that any corrections or redesigns can be carried out at no great cost.
  • one part is colored blue, while the other part is colored with a yellow color. This means that the color can be used to determine whether there is an error, i.e. if a mixture only looks blue, then the yellow part is clearly missing, because the end result must necessarily be green.
  • the course of the hardening can also be followed optically on the basis of the coloring, since when the hardening begins, the color changes from a dark green to a light green shade.
  • This phenolic resin is so easy to process in the binder mixture that it is easy to do without a scale and can only work with measuring cups. Furthermore, it is possible, by premixing, to add so much of each part that a green color is produced. Hardening is then already guaranteed.
  • a perfect mixture can be produced by mixing the phenolic resin and the polyisocyanate together with one another by means of a drilling machine while supplying the desired filler. But you can also do without this, because it is also possible to make a perfect mixture by simply stirring it by hand using a wooden stick. example

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Procede de fabrication de modeles et de dispositifs faconnes durables consistant a melanger une composition liante liquide, faite de resine phenolique et de poly-isocyanate, d'une part avec une charge inerte, telle que gypse, schiste pulverulent, poussiere de roulement a billes, sable, poudre metallique, grenaille d'aluminium, sable de quartz, argile gonflante, fibres de verre ou bois, et d'autre part avec un compose pyridinique, ce dernier faisant fonction d'accelerateur. Le procede sert essentiellement a faconner des modeles, des noyaux moules, ainsi que des plaques moulees, tels qu'ils sont faconnes par les menuiseries specialisees en preparation de modeles. Selon ce procede il est egalement possible de fabriquer des objets moules presentant des proprietes dielectriques.
PCT/CH1978/000031 1977-10-21 1978-10-19 Procede de fabrication de modeles et de dispositifs faconnes WO1979000223A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH12867/77 1977-10-21
CH1286777 1977-10-21

Publications (1)

Publication Number Publication Date
WO1979000223A1 true WO1979000223A1 (fr) 1979-05-03

Family

ID=4387127

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1978/000031 WO1979000223A1 (fr) 1977-10-21 1978-10-19 Procede de fabrication de modeles et de dispositifs faconnes

Country Status (5)

Country Link
BE (1) BE871455A (fr)
FR (1) FR2406487A1 (fr)
IT (1) IT7851585A0 (fr)
NL (1) NL7810553A (fr)
WO (1) WO1979000223A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0023586A1 (fr) * 1979-07-18 1981-02-11 Bayer Ag Masses à mouler thermodurcissables, procédé pour leur préparation et procédé de fabrication de pièces moulées en utilisant ces masses à mouler
AU619975B2 (en) * 1989-05-01 1992-02-06 Air Products And Chemicals Inc. Controlled release catalysts and curing agents for making polyurethane and/or polyisocyanurate product
EP0553457A2 (fr) * 1992-01-31 1993-08-04 INDUSTRIAL TECHNICAL R&D LABORATORY INC. Matériau mère pour modèles de bois et méthode pour le fabriquer
CN116063687A (zh) * 2021-11-01 2023-05-05 中国石油化工股份有限公司 一种疏水石英砂及其制备方法和应用

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2688322C1 (ru) * 2017-12-27 2019-05-21 федеральное государственное бюджетное образовательное учреждение высшего образования "Нижегородский государственный технический университет им. Р.Е. Алексеева" (НГТУ) Жидкостекольная смесь для изготовления литейных форм и стержней и способ ее приготовления

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB550925A (en) * 1940-07-25 1943-02-01 Du Pont Improvements in or relating to condensation products of formaldehyde and monomeric compounds
DE1193667B (de) * 1960-08-23 1965-05-26 Sueddeutsche Isolatorenwerke G Verfahren zur Herstellung von kaltgepressten Elektroisolierkoerpern mit verbesserterKriech-stromfestigkeit, die Phenolharz als Bindemittel, und Polyisocyanate enthalten
FR1500924A (fr) * 1965-07-28 1967-11-10 Minnesota Mining & Mfg Chaussure à semelle moulée et son procédé de fabrication
FR2185486A1 (fr) * 1972-05-23 1974-01-04 Kuraray Co
DE2327863A1 (de) * 1973-06-01 1975-01-02 Alfred Fischer Verfahren zur herstellung von verbundwerkstoffen aus holz und einem kunstharz sowie daraus hergestellte formkoerper und flaechengebilde
US3941743A (en) * 1973-04-27 1976-03-02 Ashland Oil, Inc. Cast metal appearing metal filled resin compositions

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB550925A (en) * 1940-07-25 1943-02-01 Du Pont Improvements in or relating to condensation products of formaldehyde and monomeric compounds
DE1193667B (de) * 1960-08-23 1965-05-26 Sueddeutsche Isolatorenwerke G Verfahren zur Herstellung von kaltgepressten Elektroisolierkoerpern mit verbesserterKriech-stromfestigkeit, die Phenolharz als Bindemittel, und Polyisocyanate enthalten
FR1500924A (fr) * 1965-07-28 1967-11-10 Minnesota Mining & Mfg Chaussure à semelle moulée et son procédé de fabrication
FR2185486A1 (fr) * 1972-05-23 1974-01-04 Kuraray Co
US3941743A (en) * 1973-04-27 1976-03-02 Ashland Oil, Inc. Cast metal appearing metal filled resin compositions
DE2327863A1 (de) * 1973-06-01 1975-01-02 Alfred Fischer Verfahren zur herstellung von verbundwerkstoffen aus holz und einem kunstharz sowie daraus hergestellte formkoerper und flaechengebilde

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0023586A1 (fr) * 1979-07-18 1981-02-11 Bayer Ag Masses à mouler thermodurcissables, procédé pour leur préparation et procédé de fabrication de pièces moulées en utilisant ces masses à mouler
AU619975B2 (en) * 1989-05-01 1992-02-06 Air Products And Chemicals Inc. Controlled release catalysts and curing agents for making polyurethane and/or polyisocyanurate product
EP0553457A2 (fr) * 1992-01-31 1993-08-04 INDUSTRIAL TECHNICAL R&D LABORATORY INC. Matériau mère pour modèles de bois et méthode pour le fabriquer
EP0553457A3 (en) * 1992-01-31 1993-10-27 Ind Technical R & D Lab Inc Parent material for wooden patterns and method of manufacturing the same
CN116063687A (zh) * 2021-11-01 2023-05-05 中国石油化工股份有限公司 一种疏水石英砂及其制备方法和应用
CN116063687B (zh) * 2021-11-01 2024-05-07 中国石油化工股份有限公司 一种疏水石英砂及其制备方法和应用

Also Published As

Publication number Publication date
NL7810553A (nl) 1979-04-24
BE871455A (fr) 1979-02-15
IT7851585A0 (it) 1978-10-20
FR2406487A1 (fr) 1979-05-18

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