WO1990000944A1 - Mould and method for the production of moulded objects from a fluidized material - Google Patents

Mould and method for the production of moulded objects from a fluidized material Download PDF

Info

Publication number
WO1990000944A1
WO1990000944A1 PCT/DK1989/000180 DK8900180W WO9000944A1 WO 1990000944 A1 WO1990000944 A1 WO 1990000944A1 DK 8900180 W DK8900180 W DK 8900180W WO 9000944 A1 WO9000944 A1 WO 9000944A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
particles
accordance
outline
binding agent
Prior art date
Application number
PCT/DK1989/000180
Other languages
French (fr)
Inventor
Torben Rasmussen
Original Assignee
Brødrene Hartmann A/S
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 Brødrene Hartmann A/S filed Critical Brødrene Hartmann A/S
Publication of WO1990000944A1 publication Critical patent/WO1990000944A1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J7/00—Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould
    • 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
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/344—Moulds, cores, or mandrels of special material, e.g. destructible materials from absorbent or liquid- or gas-permeable materials, e.g. plaster moulds in general
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/242—Moulding mineral aggregates bonded with resin, e.g. resin concrete
    • B29C67/243—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length

Definitions

  • the invention concerns.the manufacturing of moulded objects from a fluidized material.
  • a fluidized material means a starting material, in wet form and of a fibrous nature, suitable for the pro ⁇ duction of the desired objects.
  • a starting material in wet form may for instance be a fiber pulp material as used for instance for trays and cartons for packaging of fragile and sensitive objects such as fruit, flowers, eggs and objects of glass.
  • the pulp material then usually consists of a suspended, fibrous cellulose.
  • the starting material is by means of a depositing process placed against the outline-forming outside of a mould which is permeable to let a gaseous working medium affect the material through the material of the mould.
  • bronze moulds are used with a coating of weaved nets made from stainless steel defining the outline-forming part.
  • the bronze mould has through-going channels for ob ⁇ taining an even distribution of suction provoking vacuum all over the outline-forming outside of the mould.
  • a deposit of fluidized material of the desired coating thickness is obtained on the outside of the mould, for instance by submerging the mould into a pulp material mass.
  • the vacuum treatment may continue when the mould is then lifted out of the pulp mass so that the layer of material deposited on the mould is ex ⁇ posed to initial drying.
  • the channels may then be used
  • REPLACEMENTSHEET for the removal of the still moist moulded object from the mould by affecting the object by compressed air through the same channels.
  • the object of the invention is to indicate a means by which it is possible, while maintaining an in itself adntageous depositing process, to obtain a reduction in the total manufacturing time calculated from the start of the manufacturing of the mould to the delivery of the produced object while simultaneously reducing the pro- duction cost of the moulds so that the production tech ⁇ nique dependent on a depositing process may be made more economical and thereby more attractive in the production of also small object series and/or specially moulded ob ⁇ jects.
  • the invention concerns both a mould and a method for the manufacturing of moulded objects from fluidized material.
  • the mould is characte ⁇ rized in that at least the outline-forming part of the mould is built up of a particulate stone-particle mate ⁇ rial whose stone particles provide a contour-stable outer outline, the said particles simultaneously together li ⁇ miting open passages extending through the material of the mould to the outside of the outline-forming part of the mould and being connected to a source for removal by suction of fluidizing liquid.
  • Such a mould may be produced both from a cheap, in ⁇ organic raw material such as sand and by a production technique which is simple, of short duration and thus cheap compared with the time and cost consumed in the ma ⁇ nufacturing of the known deposit moulds described above.
  • the stone material of the mould may consist of par ⁇ ticles of different particle size as the particle size is small in the outline-forming part of the casting mould and bigger in an underlying supporting layer for this part. In this way a good passage for air is achieved, a relatively smooth outside of the mould being simulta ⁇ neously at the disposal of the object to be produced, which will result in the object getting an even outer surf ce.
  • the mould strength necessary for the carrying through of the production process may be obtained in a simple way by mixing the stone particles with suitable binding agents which may contain adhesion-improving a- gents and by hardening the mould produced from such a mixture by for instance heat treatment. Also wedging be ⁇ tween the stone particles may be used to give the mould strength.
  • An appropriate structure of the mould is for the bottom of the mould to have a basic part in which the particles are linked together by a real fusion compound whereas the particles in the rest of the mould are linked together by a hardening conglutinating compound.
  • Such a mould is characterized by good strength which will also enable it to resist considerable working pressure from for instance steam.
  • the method according to the invention is, prior to the depositing of a layer of a fluidized material on the outline-forming outside of a mould which is permeable for a gaseous working medium, to manufacture a mould having the above-mentioned characteristics and at least the out ⁇ line-forming part of the mould being formed by a gravelly
  • REPLACEMENTSHEET stone-particle material whose particles are bound to ⁇ gether for the formation of an open, stable structure with through-going passages for air to the outside of the mould and then to carry through the depositing on the mould thus formed.
  • the total manufacturing process calculated from the beginning of the manufac ⁇ turing of the mould to the delivery of the produced ob ⁇ ject can be shortened considerably as it is no longer ne ⁇ cessary to produce an expensive metal mould. Owing to the achieved reduction in time as well as the use of cheap building material for the mould it becomes possible to use the above-mentioned depositing technique in an eco ⁇ nomically attractive way for the production of also small object series and/or for the production of specially moulded objects.
  • the particles of the gravelly stone material are bound together prior to the start of the influence by the gas ⁇ eous working medium by the use of a binding agent having such surface tension that it will attempt to obtain its smallest surface size.
  • the binding agent coalesces - for instance in connection with heating - a- round the particles of the mould building material thus avoiding clogging of the air passages between the par- tides as agglutination will only take place where the particles, are directly in contact with each other.
  • a rounded shape of the particles of the building material may, according to the invention, be ap ⁇ limbate.
  • the desired porosity of the mould may be checked and controlled by a suitable choice of the grain size of the particle material and the distribution of the grains in order to achieve both fa ⁇ vourable conditions for the agglutination connection be ⁇ tween the particles and a suitable dimensioning of the porosity in order to avoid an undesirable pressure drop over an unnecessary tight building material.
  • the particles of the gravelly stone material may, prior to the start of the influence by the gaseous working medium, be bound to each other by using a binding agent which after the binding of the particles leaves a free surface which is smoothed.
  • a satisfactory surface draft may be secured, also in cases where the outline-forming surface, owing to the above-mentioned surface-tension effect of the binding agent used for the agglutination of the partic ⁇ les, leads to a free surface which at first glance seems rough.
  • the particles of the gravelly stone material may, prior to the influence by the gaseous working medium, be bound together by using a thermo-hardening binding agent.
  • a thermo-hardening binding agent This involves the advantage of the hardened mould getting a good slip effect with regard to the mould against which the outline-forming surface of the mould has been mould ⁇ ed.
  • the finished mould may thereby get such a degree of temperature stability that a high degree of freedom is achieved as regards cleaning of the mould by using heat.
  • thermo-hardening bind ⁇ ing agent containing a liquable smoothing agent may be used.
  • the mould may then for instance be exposed to treatment by wax, oil or a teflon product.
  • the liquable smoothing agent can counteract an undesirable sediment or detention of fluidized material, for instance fibers, on the outside.
  • a liquable smoothing agent will at the use of heat and suction be able to contribute to the cleaning of the porosities in the mould.
  • the particles of the gravelly stone material may, prior to the start of the influence by the gaseous working medium, be bound " to ⁇ gether by the use of a binding agent which prior to the final binding of the particles shows adhesion-improving properties. This may result in easier shaping of the out ⁇ line-forming part of the mould.
  • thermo-hardening binding agent is phenolic resin and the desired adhesion-improving pro- perties may for instance be obtained by also using si- lane.
  • the above-mentioned process and mould may, as men ⁇ tioned, in practice be used for the production of objects from various starting materials, such as fibre-containing suspensions, everything in the presence of the ancillary materials which may be necessary to create connection in the layer of material obtained by suction onto the mould.
  • the process may according to the invention be car- ried out by depositing fluidized material on the outline- forming part of the mould by means of a gaseous working medium in an actually known way by exposing at least this outline-forming part to a suction provoking vacuum as the mould can according to the invention be produced with the necessary strength.
  • the transfer mould can be manufactured directly on the basis of an object produced on the cast- ing mould as on this object a first auxiliary mould (ne ⁇ gative) of for instance gypsum is produced corresponding to the side of the object pointing away from the casting mould and on this first auxiliary mould (negative) a se ⁇ cond auxiliary mould (positive) is produced for instance also from gypsum and the transfer mould (negative) is then formed directly on this second auxiliary mould.
  • a first auxiliary mould (ne ⁇ gative) of for instance gypsum is produced corresponding to the side of the object pointing away from the casting mould and on this first auxiliary mould (negative) a se ⁇ cond auxiliary mould (positive) is produced for instance also from gypsum and the transfer mould (negative) is then formed directly on this second auxiliary mould.
  • a suitable moisturizing of the stone-particle substance by adding liquid either in the form of water, a solvent or a bind- ing agent it will be possible in advance to give the stone-particle substance a consistency which ensures the necessary position or shape stability during the heat treatment.
  • the moist stone-particle substance can the be dried to increase the stability of the substance before the hardening by heat is carried out.
  • a stabilizing ef ⁇ fect may also be obtained by pre-heating the stone-par ⁇ ticle substance. The stabilization will then have been achieved when the stone-particle substance has been cool ⁇ ed. It is possible to reduce the hardening time by adding accelerators to the binding agent.
  • a mould used in accordance with the invention can also be produced in such a way that it may, after use or in case of heavy wear, be regenerated as the particle- shaped building material of the mould may be recycled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Mold Materials And Core Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Moulded objects of an aqueous suspension of a fibrous material, especially fiber pulp, are produced by placing a layer of the material through a depositing process against the outline-forming outside of a mould which is permeable in order to let a vacuum influence the material through the material of the mould. Prior to this influence a mould is manufactured which at least as regards the outline-forming part of the mould consists of a particulate stone-particle material whose particles are bound together for the creation of a structure with a form-stable outside outline with through-going air passages to the outside of the mould. The depositing is subsequently carried out on the mould thus created.

Description

Mould and Method for the Production of
Moulded Objects from a Fluidized Material
The invention concerns.the manufacturing of moulded objects from a fluidized material.
A fluidized material means a starting material, in wet form and of a fibrous nature, suitable for the pro¬ duction of the desired objects. A starting material in wet form may for instance be a fiber pulp material as used for instance for trays and cartons for packaging of fragile and sensitive objects such as fruit, flowers, eggs and objects of glass. The pulp material then usually consists of a suspended, fibrous cellulose. In all these manners of production it is usually a question of continuously producing large object series by mass production. It is well known for this purpose to use a production technique by which the starting material is by means of a depositing process placed against the outline-forming outside of a mould which is permeable to let a gaseous working medium affect the material through the material of the mould. For the production of objects of pulp processed bronze moulds are used with a coating of weaved nets made from stainless steel defining the outline-forming part. Based on the above, the invention will in the following be explained in detail.
The bronze mould has through-going channels for ob¬ taining an even distribution of suction provoking vacuum all over the outline-forming outside of the mould. By means of this vacuum a deposit of fluidized material of the desired coating thickness is obtained on the outside of the mould, for instance by submerging the mould into a pulp material mass. The vacuum treatment may continue when the mould is then lifted out of the pulp mass so that the layer of material deposited on the mould is ex¬ posed to initial drying. The channels may then be used
REPLACEMENTSHEET for the removal of the still moist moulded object from the mould by affecting the object by compressed air through the same channels.
This traditional manufacturing process is long and expensive owing to the time and the expensive material used for manufacturing the moulds. The traditional manu¬ facturing process has therefore often proved inconvenient for the production of low-prices, small object series.
The object of the invention is to indicate a means by which it is possible, while maintaining an in itself adntageous depositing process, to obtain a reduction in the total manufacturing time calculated from the start of the manufacturing of the mould to the delivery of the produced object while simultaneously reducing the pro- duction cost of the moulds so that the production tech¬ nique dependent on a depositing process may be made more economical and thereby more attractive in the production of also small object series and/or specially moulded ob¬ jects. In order to achieve this objective the invention concerns both a mould and a method for the manufacturing of moulded objects from fluidized material.
According to the invention the mould is characte¬ rized in that at least the outline-forming part of the mould is built up of a particulate stone-particle mate¬ rial whose stone particles provide a contour-stable outer outline, the said particles simultaneously together li¬ miting open passages extending through the material of the mould to the outside of the outline-forming part of the mould and being connected to a source for removal by suction of fluidizing liquid.
Such a mould may be produced both from a cheap, in¬ organic raw material such as sand and by a production technique which is simple, of short duration and thus cheap compared with the time and cost consumed in the ma¬ nufacturing of the known deposit moulds described above. The stone material of the mould may consist of par¬ ticles of different particle size as the particle size is small in the outline-forming part of the casting mould and bigger in an underlying supporting layer for this part. In this way a good passage for air is achieved, a relatively smooth outside of the mould being simulta¬ neously at the disposal of the object to be produced, which will result in the object getting an even outer surf ce. The mould strength necessary for the carrying through of the production process may be obtained in a simple way by mixing the stone particles with suitable binding agents which may contain adhesion-improving a- gents and by hardening the mould produced from such a mixture by for instance heat treatment. Also wedging be¬ tween the stone particles may be used to give the mould strength.
An appropriate structure of the mould is for the bottom of the mould to have a basic part in which the particles are linked together by a real fusion compound whereas the particles in the rest of the mould are linked together by a hardening conglutinating compound. Such a mould is characterized by good strength which will also enable it to resist considerable working pressure from for instance steam.
It is also within the scope of the invention to ma¬ nufacture and use a mould by which the particles of the gravelly stone material are by means of a binding agent kept together with such strength that the mould can be used for the finishing pressing of a moulded object.
The method according to the invention is, prior to the depositing of a layer of a fluidized material on the outline-forming outside of a mould which is permeable for a gaseous working medium, to manufacture a mould having the above-mentioned characteristics and at least the out¬ line-forming part of the mould being formed by a gravelly
REPLACEMENTSHEET stone-particle material whose particles are bound to¬ gether for the formation of an open, stable structure with through-going passages for air to the outside of the mould and then to carry through the depositing on the mould thus formed. In this way the total manufacturing process, calculated from the beginning of the manufac¬ turing of the mould to the delivery of the produced ob¬ ject can be shortened considerably as it is no longer ne¬ cessary to produce an expensive metal mould. Owing to the achieved reduction in time as well as the use of cheap building material for the mould it becomes possible to use the above-mentioned depositing technique in an eco¬ nomically attractive way for the production of also small object series and/or for the production of specially moulded objects.
If for binding purposes a gravelly stone-particle material is used whose particles are of such size and form that they can form a wedging compound with each other, it will be possible, at least partly, to omit a binding agent.
In another embodiment according to the invention the particles of the gravelly stone material are bound together prior to the start of the influence by the gas¬ eous working medium by the use of a binding agent having such surface tension that it will attempt to obtain its smallest surface size. By this method the binding agent coalesces - for instance in connection with heating - a- round the particles of the mould building material thus avoiding clogging of the air passages between the par- tides as agglutination will only take place where the particles, are directly in contact with each other. In this respect a rounded shape of the particles of the building material may, according to the invention, be ap¬ propriate. This also demonstrates that the desired porosity of the mould may be checked and controlled by a suitable choice of the grain size of the particle material and the distribution of the grains in order to achieve both fa¬ vourable conditions for the agglutination connection be¬ tween the particles and a suitable dimensioning of the porosity in order to avoid an undesirable pressure drop over an unnecessary tight building material.
According to the invention the particles of the gravelly stone material may, prior to the start of the influence by the gaseous working medium, be bound to each other by using a binding agent which after the binding of the particles leaves a free surface which is smoothed. In this way a satisfactory surface draft may be secured, also in cases where the outline-forming surface, owing to the above-mentioned surface-tension effect of the binding agent used for the agglutination of the partic¬ les, leads to a free surface which at first glance seems rough.
The particles of the gravelly stone material may, prior to the influence by the gaseous working medium, be bound together by using a thermo-hardening binding agent. This involves the advantage of the hardened mould getting a good slip effect with regard to the mould against which the outline-forming surface of the mould has been mould¬ ed. Furthermore, the finished mould may thereby get such a degree of temperature stability that a high degree of freedom is achieved as regards cleaning of the mould by using heat.
According to the invention a thermo-hardening bind¬ ing agent containing a liquable smoothing agent may be used. The mould may then for instance be exposed to treatment by wax, oil or a teflon product. The liquable smoothing agent can counteract an undesirable sediment or detention of fluidized material, for instance fibers, on the outside. Furthermore, a liquable smoothing agent will at the use of heat and suction be able to contribute to the cleaning of the porosities in the mould. According to the invention the particles of the gravelly stone material may, prior to the start of the influence by the gaseous working medium, be bound "to¬ gether by the use of a binding agent which prior to the final binding of the particles shows adhesion-improving properties. This may result in easier shaping of the out¬ line-forming part of the mould.
An example of a thermo-hardening binding agent is phenolic resin and the desired adhesion-improving pro- perties may for instance be obtained by also using si- lane.
The above-mentioned process and mould may, as men¬ tioned, in practice be used for the production of objects from various starting materials, such as fibre-containing suspensions, everything in the presence of the ancillary materials which may be necessary to create connection in the layer of material obtained by suction onto the mould.
In case of for instance fibre-containing suspen¬ sions, the process may according to the invention be car- ried out by depositing fluidized material on the outline- forming part of the mould by means of a gaseous working medium in an actually known way by exposing at least this outline-forming part to a suction provoking vacuum as the mould can according to the invention be produced with the necessary strength.
As mentioned at the beginning the removal of an ob¬ ject formed by depositing a fluidized material on the outline-forming outside of the mould by means of a gas¬ eous working medium may in practice take place by affect- ing the Object by compressed air through the air passages of the mould and thus lifting it free of the mould. In practice the object will, however, often still be rather soft, and for the purpose of removing the object from the casting mould a transfer mould is usually employed which is adapted for interaction with the side of the object pointing away from the above-mentioned outline-forming outside for the removal of the object from this outside and for the subsequent placing of the object on for in¬ stance a conveyer belt taking the object to a drying chamber. Also such transfer moulds have so far been made of metal, for instance bronze.
It is within the scope of the invention also to form such a transfer mould from a gravelly stone-particle material as mentioned above, as the particles of the ma¬ terial are bound together for the formation of a open, stable structure with through-going air passage to the outside of the mould and the thus created mould is con¬ nected with a source for a suction provoking vacuum.
This means that also as regards this part of the total manufacturing process a cheap raw material may be used in connection with a production technique which is simple, of short duration and thus cheap compared with the time and cost consumed at the production of the known transfer moulds. The transfer mould can be manufactured directly on the basis of an object produced on the cast- ing mould as on this object a first auxiliary mould (ne¬ gative) of for instance gypsum is produced corresponding to the side of the object pointing away from the casting mould and on this first auxiliary mould (negative) a se¬ cond auxiliary mould (positive) is produced for instance also from gypsum and the transfer mould (negative) is then formed directly on this second auxiliary mould.
Experience has shown that it will be appropriate for the mould created from the gravelly stone-particle material by means of a thermo-hardening binding agent to be hardened by heat while the outline-forming outside of the mould is kept free, or in other words not kept in po¬ sition or shape by an auxiliary mould part. The use of such an auxiliary mould part might otherwise result in the binding agent also getting in touch with the auxilia- ry mould in places where it flows partly between and partly over the gravel particles and thus creating bind- ing-agent taps which may reduce the subsequently desired slip properties of the mould. In case of a suitable moisturizing of the stone-particle substance by adding liquid, either in the form of water, a solvent or a bind- ing agent it will be possible in advance to give the stone-particle substance a consistency which ensures the necessary position or shape stability during the heat treatment. The moist stone-particle substance can the be dried to increase the stability of the substance before the hardening by heat is carried out. A stabilizing ef¬ fect may also be obtained by pre-heating the stone-par¬ ticle substance. The stabilization will then have been achieved when the stone-particle substance has been cool¬ ed. It is possible to reduce the hardening time by adding accelerators to the binding agent.
Experience has shown that the outline-forming out¬ side of moulds produced in accordance with the invention is especially easy to keep clean as the mould used for the production of the object is, prior to the start of the depositing process or the transfer process as regards cleaning, exposed to an air current flowing through the mould passages for a gaseous medium. Additional cleaning arrangements should on the whole be unnecessary which also contributes to simplification and price reduction as regards the total production process.
A mould used in accordance with the invention can also be produced in such a way that it may, after use or in case of heavy wear, be regenerated as the particle- shaped building material of the mould may be recycled.

Claims

PATENT CLAIM
1. Mould for the manufacturing of moulded objects from an aqueous suspension of a fibrous material, 'espe¬ cially paper pulp, which mould is permeable for a vacuum in order to provoke a depositing of the material against the outside of the outline-forming part of the mould, characterized by at least the outline-forming part of the mould being built up of a particulate stone-particle ma¬ terial whose stone particles provide a contour-stable outer outline, the said particles simultaneously together limiting open passages extending through the material of the mould to the outside of the outline-forming part of the mould and being connected to a source for removal by suction of a fluidizing liquid.
2. Mould in accordance with claim 1, characterized by the particles of the stone material being coated with a layer constituted by a binding agent.
3. Mould in accordance with claim 2, characterized by the binding agent being thermo hardening.
4. Mould in accordance with claim 2, characterized by the binding agent containing an adhesion-improving agent.
5. Mould in accordance with any of the claims 1 to
4, characterized by the particles of the stone material having a rounded outline.
6. Mould in accordance with any of the claims 1 to
5, characterized by the particles of the stone material being in wedging connection with each other.
7. Mould in accordance with any of the claims 1 to 6, characterized by the particles of the gravelly stone material being kept together by means of a binding agent at such strength that the mould may be used for subse¬ quent pressing of an object.
8. Method for the manufacturing of moulded objects from a fluidized material, especially a fibrous material, as a layer of the material is, through a depositing pro- cess, placed against the outline-forming outside of a mould which is permeable in order to let a gaseous work¬ ing medium influence the material through the material of the mould, characterized by a mould being, prior to this influence, manufactured as described in any of the above-mentioned claims and, at least as regards the out¬ line-forming part of the mould, being built by a gravelly stone-particle material whose particles are bound to¬ gether for the creation of an open, contour-stable struc- ture with through-going air passages to the outside of the mould, which are connected to a source for suctional removal of suspension liquid and the depositing then be¬ ing carried out on the mould thus created.
9. Method in accordance with claim 8, characterized by the particles of the gravelly stone material being, prior to the start of the influence by the gaseous work¬ ing medium, bound together by means of a binding agent with such surface tension that it will attempt to achieve its smallest surface size.
10. Method in accordance with claim 8 or 9, charac¬ terized by the particles of the gravelly stone material being, prior to the start of the influence through the gaseous working medium, bound together by means of a binding agent which after the binding of the particles leaves a free, smoothed surface.
11. Method in accordance with claim 10, characte¬ rized by the use of a thermo-hardening binding agent con¬ taining a liquable smoothing agent.
12. Method in accordance with any of the claims 8 to 11, characterized by being, prior to the start of the influence by the gaseous working medium, bound together by means of a binding agent which, prior to the final binding of the particles shows adhesion-improving pro¬ perties.
13. Method in accordance with any of the above-men¬ tioned claims 8 to 12 for the manufacturing of moulded objects from a fluidized material as the object formed on the outline-forming outside of a mould by the deposit¬ ing of a layer of material as described in any of the claims 1 to 7 in accordance with the method according to any of the claims 8 to 12 is removed from this mould by means of a transfer mould which is designed to interact with the side of the object pointing away from the de¬ scribed outline-forming outside for the removal of the object from this outside, characterized by the transfer mould being manufactured, prior to the removal, as de¬ scribed in any of the above-mentioned claims and being connected with a source for a vacuum provoking suction.
14. Method in accordance with any of the claims 11 to 13, characterized by the mould created by means of a thermo-hardening binding agent from the gravelly stone material being hardened by heat prior to the start of the influence by the gaseous working medium while the out¬ line-forming outside of the mould is kept free.
ENTSHEET
PCT/DK1989/000180 1988-07-21 1989-07-20 Mould and method for the production of moulded objects from a fluidized material WO1990000944A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK408888A DK167254B1 (en) 1988-07-21 1988-07-21 PROCEDURE FOR THE PREPARATION OF FORMED ARTICLES OF A FLUIDIZED CELLULOSE FIBER MATERIAL
DK4088/88 1988-07-21

Publications (1)

Publication Number Publication Date
WO1990000944A1 true WO1990000944A1 (en) 1990-02-08

Family

ID=8130068

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1989/000180 WO1990000944A1 (en) 1988-07-21 1989-07-20 Mould and method for the production of moulded objects from a fluidized material

Country Status (10)

Country Link
CN (1) CN1040409A (en)
AU (1) AU4033289A (en)
BR (1) BR8903603A (en)
CH (1) CH679559A5 (en)
DK (1) DK167254B1 (en)
ES (1) ES2016484A6 (en)
GR (1) GR1001014B (en)
MX (1) MX171468B (en)
PT (1) PT91223B (en)
WO (1) WO1990000944A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559490A1 (en) * 1992-03-06 1993-09-08 Ngk Insulators, Ltd. A pulp mold, a method, and a molding apparatus for producing fiber bodies
EP0559491A1 (en) * 1992-03-06 1993-09-08 Ngk Insulators, Ltd. Pulp molding die for molding shaped pulp articles, method and apparatus
GB2331040A (en) * 1997-11-05 1999-05-12 Universal Pulp Packaging Ltd Porous mould for forming fibre products
EP2060630A2 (en) 1997-04-10 2009-05-20 Stichting Katholieke Universiteit University Medical Centre Nijmegen PCA3, PCA3 genes, and methods of use
US7927806B2 (en) 1999-09-29 2011-04-19 Diagnocure Inc. Distinguishing PCA3 messenger RNA species in benign and malignant prostate tissues
US7960109B2 (en) 2004-12-24 2011-06-14 Stichting Katholieke Universiteit, The University Medical Centre Nijmegen mRNA ratios in urinary sediments and/or urine as a prognostic and/or theranostic marker for prostate cancer
US8192931B2 (en) 2003-02-07 2012-06-05 Diagnocure Inc. Method to detect prostate cancer in a sample

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0757733T3 (en) * 1994-04-27 1998-05-25 Hartmann As Brdr Suction mold for making papermachine blanks and method for making such mold
CN1623022A (en) * 2002-02-26 2005-06-01 绿谷科技有限公司 Improved molded fiber manufacturing
CN105908578A (en) * 2016-05-03 2016-08-31 东莞当纳利印刷有限公司 Production method of paper pulp molded product

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE227276C1 (en) * 1969-09-23

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE435196C (en) * 1922-10-03 1926-10-14 Josef Franz Kuehnel Form made of ceramic porous mass
CH186280A (en) * 1934-11-29 1936-09-15 Limited Papercrete Process for making articles of paper pulp and apparatus for carrying out this process.
DE900261C (en) * 1944-07-04 1953-12-21 Schiess Ag Molding process
FR925073A (en) * 1946-03-20 1947-08-25 Shell for molding and its manufacturing process
DE1504261A1 (en) * 1964-11-17 1969-09-25 Farrell James A Porous solid body and method of shaping the same
DE1909855A1 (en) * 1969-02-27 1970-11-26 Daimler Benz Ag Transfer method for road surface pattern - to tes tracks
FR2489738A1 (en) * 1980-09-11 1982-03-12 Isobox Sa NEW MOLDS DESIGNED FOR THE MANUFACTURE OF EXPANDED, NON-POLAR PLASTIC MATERIALS USING ULTRA-HIGH FREQUENCY RADIATION
MX161282A (en) * 1983-04-09 1990-08-28 Sintokogio Ltd FORMING, COMPOSITE AND DURABLE MODEL TO MANUFACTURE THREE-DIMENSIONAL PRODUCTS
JPS62128711A (en) * 1985-11-30 1987-06-11 Kojima Press Co Ltd Molding tool having permeability

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE227276C1 (en) * 1969-09-23

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559491A1 (en) * 1992-03-06 1993-09-08 Ngk Insulators, Ltd. Pulp molding die for molding shaped pulp articles, method and apparatus
US5399243A (en) * 1992-03-06 1995-03-21 Ngk Insulators, Ltd. Pulp molding die for molding shaped pulp articles, method, apparatus, and shaped pulp article
US5431784A (en) * 1992-03-06 1995-07-11 Ngk Insulators, Ltd. Pulp mold, a method, and a molding apparatus for producing fiber bodies, and a molded fiber body
US5531864A (en) * 1992-03-06 1996-07-02 Ngk Insulators, Ltd. Method of molding shaped pulp articles from fiber pulp, and shaped pulp article
US5547544A (en) * 1992-03-06 1996-08-20 Ngk Insulators, Ltd. Method of molding shaped pulp articles from fiber pulp
EP0559490A1 (en) * 1992-03-06 1993-09-08 Ngk Insulators, Ltd. A pulp mold, a method, and a molding apparatus for producing fiber bodies
US8551699B2 (en) 1997-04-10 2013-10-08 Stichting Katholieke Universiteit, more particularly The University of Medical Centre Nijmegen PCA3, PCA3 genes, and methods of use
EP2060630A2 (en) 1997-04-10 2009-05-20 Stichting Katholieke Universiteit University Medical Centre Nijmegen PCA3, PCA3 genes, and methods of use
US9540696B2 (en) 1997-04-10 2017-01-10 Stichting Katholieke Universiteit, The University Medical Centre Nijmegen PCA3 genes
GB2331040A (en) * 1997-11-05 1999-05-12 Universal Pulp Packaging Ltd Porous mould for forming fibre products
US8618276B2 (en) 1999-09-29 2013-12-31 Diagnocure Inc. Distinguishing PCA3 messenger RNA species in benign and malignant prostate tissues
US8241848B2 (en) 1999-09-29 2012-08-14 Diagnocure Inc. Distinguishing PCA3 messenger RNA species in benign and malignant prostate tissues
US7927806B2 (en) 1999-09-29 2011-04-19 Diagnocure Inc. Distinguishing PCA3 messenger RNA species in benign and malignant prostate tissues
US9909189B2 (en) 1999-09-29 2018-03-06 Gen-Probe Incorporated Distinguishing PCA3 messenger RNA species in benign and malignant prostate tissues
US8546551B2 (en) 2003-02-07 2013-10-01 Diagnocure Inc. Method to detect prostate cancer in a sample
US8192931B2 (en) 2003-02-07 2012-06-05 Diagnocure Inc. Method to detect prostate cancer in a sample
US10006092B2 (en) 2003-02-07 2018-06-26 Gen-Probe Incorporated Method to detect prostate cancer in a sample
US11104958B2 (en) 2003-02-07 2021-08-31 Gen-Probe Incorporated Method to detect prostate cancer in a sample
US8257924B2 (en) 2004-12-24 2012-09-04 Stichting Katholieke Universiteit, The University Medical Centre Nijmegen mRNA ratios in urinary sediments and/or urine as a prognostic and/or theranostic marker for prostate cancer
US7960109B2 (en) 2004-12-24 2011-06-14 Stichting Katholieke Universiteit, The University Medical Centre Nijmegen mRNA ratios in urinary sediments and/or urine as a prognostic and/or theranostic marker for prostate cancer
US9096907B2 (en) 2004-12-24 2015-08-04 Stichting Katholieke Universiteit, The University Medical Centre Nijmegen Prostate cancer prognostic compositions and kits
US9951390B2 (en) 2004-12-24 2018-04-24 Stichting Katholieke Universiteit, The University Medical Centre Nijmegen Prostate cancer prognostic compositions and kits
US10752957B2 (en) 2004-12-24 2020-08-25 Gen-Probe Incorporated Prostate cancer prognostic compositions and kits

Also Published As

Publication number Publication date
CN1040409A (en) 1990-03-14
PT91223A (en) 1990-02-08
AU4033289A (en) 1990-02-19
DK408888D0 (en) 1988-07-21
PT91223B (en) 1996-05-31
DK167254B1 (en) 1993-09-27
CH679559A5 (en) 1992-03-13
ES2016484A6 (en) 1990-11-01
BR8903603A (en) 1990-10-02
GR1001014B (en) 1993-03-31
DK408888A (en) 1990-01-22
MX171468B (en) 1993-10-28
GR890100465A (en) 1991-12-10

Similar Documents

Publication Publication Date Title
JP4870898B2 (en) Method and apparatus for foam casting using a three-dimensional mold
WO1990000944A1 (en) Mould and method for the production of moulded objects from a fluidized material
US4160003A (en) Method of molding cementitious material
JP3173706B2 (en) Pulp Mold Mold
CN104884186B (en) The structures such as the manufacture method and casting mold of structure for casting production
EP0441835A1 (en) Method for the manufacture of contour-stable objects.
US20050248067A1 (en) Molder for pulp, slurry, other suspensions
EP1015696B1 (en) Method of manufacturing a liquid-permeable suction mould for use in making articles of pulp, and mould made by carrying out the method
JPS609704A (en) Section for wet type paper making of fibrous slurry
EP0441847A1 (en) Method for the manufacture of load-carrying elements including pallets
GB2331040A (en) Porous mould for forming fibre products
CA2001294A1 (en) Mould and method for the manufacture of moulded objects of plastic
JPH0568825A (en) Model for manufacturing ceramic filter, ceramic filter and manufacture thereof
JPH05247900A (en) Production of cushioning material for packaging using pulps as raw material
JPS5833802B2 (en) Manufacturing method of inorganic substrate
JPS5892511A (en) Paper making method
JP4339491B2 (en) Mold board manufacturing method
JPS59130645A (en) Mold forming method
JPH05502065A (en) Method for manufacturing articles with stable shape
JPH01174693A (en) Porous forming mold
JPS62288006A (en) Manufacture of complicate special-form refractory fiber molded form
JPH1034636A (en) Manufacture of external facing building-material

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU CH DE FI GB JP KP NL NO SE US

AL Designated countries for regional patents

Kind code of ref document: A1

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

WWE Wipo information: entry into national phase

Ref document number: 1989908821

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWW Wipo information: withdrawn in national office

Ref document number: 1989908821

Country of ref document: EP