CN1042389A - Processing method with member of stable topography profile - Google Patents
Processing method with member of stable topography profile Download PDFInfo
- Publication number
- CN1042389A CN1042389A CN89108946A CN89108946A CN1042389A CN 1042389 A CN1042389 A CN 1042389A CN 89108946 A CN89108946 A CN 89108946A CN 89108946 A CN89108946 A CN 89108946A CN 1042389 A CN1042389 A CN 1042389A
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- CN
- China
- Prior art keywords
- mould
- slurries
- raw material
- thickness
- fiber raw
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Classifications
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- 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
Abstract
Utilize a production process manufacturing to have the member of stable topography, it is by the fiber raw material slurries on the suction die holder fluidisation fiber raw material to be deposited on the die holder.For this purpose, be added with a certain amount of easy draining slurries of making by the fluidisation fiber raw material on the die holder, aspiration procedure is controlled with certain method, thereby fiber raw material is deposited upon on the die holder by suction, this fibrous material layer has certain wall thickness, and this wall thickness can guarantee the desired dimensional stability of member basically.
Description
The present invention relates to a kind of processing method with stable topography profile elements, this method is that fiber raw material is deposited in the die holder fluidisation fiber raw material in the utilization suction die holder.
The fluidisation fiber raw material be meant a kind of wet, have fiber properties and be suitable for processing the original material of desired member.This original material may be a fibre stuff, and it is used to make pallet and carton is packed frangible and sensitive articles, as fruit, fresh flower, egg, and article such as glass, this slurry is made up of the fibrous cellulose that suspends usually.
It is well-known using a kind of like this production technology for this purpose, this technology is to be attached to slurries shape original material on the outer shaped profile of mould by deposition process, this mould is permeable, it can make gaseous working medium, by swabbing action, pass mold materials and act on this material, therefore, by suction, on mould, form the appearance profile of material.
It is how both can produce quite little He light member to the objective of the invention is to propose this production technology itself, also can produce large-scale, quite heavy, member that have dimensional stability, that have high energy power, this dimensional stability are that the relative thickness of material layer decides on the die holder according to being deposited on basically.Compare with it, the wall thickness of said little and light object is quite thin, and required rigidity is actually such acquisition, promptly by carefully moulding the wall panel, it is used for supporting described object, and this moment, wallboard produced a member with suitable rigidity by mutual support.
The purpose that the present invention stated is to realize like this, be applied on the pedestal it is easy to discharge a certain amount of water and controls suction with certain method by the formed slurries of fluidisation fiber raw material, this method is by suction, the certain thickness fiber raw material layer of deposition on die holder, with the requirement of satisfying member appearance profile stability.
Use above-mentioned production technology, it can produce the high member that carries equally, resembles carriage and building element, and opposite with above-mentioned packing example, it can demonstrate quite steady and smooth outer surface, itself shows the appearance profile stability of height.The deposition of certain thickness fiber raw material layer means that the negative pressure that is used for aspirating may obtain a kind of like this density of material in layer of feed stock material, directly on the outer surface of the material layer of die face, its density is the highest, and its density is the effect of increase on by the distance of lithosomic body neutral line.
By using the layer thickness of institute's tool member, the dimensional stability of this member also can obtain according to the present invention to improve on the fiber raw material layer, and the variation that produces the bed thickness of a place or many places corresponding to the variation in the swabbing action of the associating aspiration procedure that is used for processing the necessary fiber pulp liquid measure of whole member.In the method, with one or the identical course of work, that is: the fiber raw material layer is deposited on the process on the die holder, just may form a desired final profile of member and the thickness by the Material Used layer, in the real material of formed parts, make appearance structure with the dimensional stability that has strengthened.According to the present invention, this structure can be shaped as the network that the thickness thicker with respect to other parts of member connects.
According to the present invention, the characteristics of finishing the suitable method of this method are, for the fiber raw material slurries that are easy to draining are drawn into desired thickness, use a kind of mould, it allows the infiltration of gaseous state active operation medium under negative pressure condition, and the die surface that a permeable working media is arranged, this surperficial permeability can be adjusted to by the suction to slurries, the thickness of the fiber raw material layer that deposits on this die surface.
Can obtain the mutual restriction between the suction capactity of the drainability of slurries and die surface by this way, thereby reasonably make the member that has corresponding to the thicker fiber layer thickness of desired bearing capacity.
In order to obtain the localized variation of member fiber raw material layer thickness, according to the present invention, can use a mould with model surface of infiltration changing capability, this infiltration changes corresponding to the variation of the localized variation that is deposited on the fibre stuff layer thickness that is easy to draining on the model surface owing to suction, each layer itself and the bed thickness of cross-linked network lattice structure and changes.
This means that the deposition of fiber raw material on mould will change according to the permeability of mold surface, this permeability will cause localized variation under swabbing action, under swabbing action, the place of model surface poor permeability, the deposition of fiber raw material will reduce, on the contrary, in the strong place of model surface permeability, deposition will increase.
According to the present invention, the feature of the embodiment of this method is, use a mould, be used for the easy draining slurry that fibrous raw material is made is drawn into desired thickness, its mould is permeable gaseous state active operation medium under negative pressure, and at least for the profile shaped portion, it is made up of the part composite, the particle of this composite is fixed together, be used to form the die surface of firm appearance profile, simultaneously, they define the path of working media jointly, and these paths are to pass the outer surface that composite leads to mould.At least, forming the thickness of the composite layer of die surface, is to regulate according to the thickness of the fiber raw material layer that utilizes the suction slurries to be deposited on die surface.
A kind of like this mould is by cheap inorganic material, resembles sand, makes, or uses simple production technology, and its cycle is short, thereby also just cheap.Total producing cost of mould maintains low-level, and therefore this embodiment also just is applicable to the production of be pilot.
In order to obtain the localized variation of fiber raw material layer thickness on the member, according to the present invention, use a kind of like this mould, in this mould, the formed composite of die surface has a kind of like this thickness, its varied in thickness is corresponding to owing to suction is deposited on the localized variation of the fibre stuff layer thickness that is easy to draining on the die surface, the variation of each layer itself, and the bed thickness of cross-linked network lattice structure variation.
According to the present invention, can use a kind of like this mould, the permeable surface of this mould is formed by having the particle that changes granularity.Its granularity is smaller at the position, mould surface that forms mould, and can be greatly on the material layer on a hold mode surface.By this way, can obtain to help the path that air flows, simultaneously, concerning processed member, can obtain a quite smooth forming mould surface, and make member obtain a smooth surface.
The needed mold strength of production process can obtain by plain mode, Here it is mixes the mould pellet mutually with suitable bonding (this adhesive contain strengthen adhesive), can also reach the sclerosis purpose and makes said mould by this mixture is heat-treated.Can also obtain intensity by embedding wedge in pellet.
Furthermore, according to the present invention, can use a kind of like this mould, this mould has a substrate in the bottom, compound particle on the substrate can couple together by a kind of real fusible component, and the remainder pellet of mould can couple together by a kind of adhesive of solidifiable.Such mould is characterized in having high strength, makes it can resist certain working pressure.
Equally, within the scope of the present invention, also comprise a kind of like this mould of use, the mould of this mould surface mouldable becomes to have certain intensity, thereby the final pressure processing of this mould when can be used for the moulding member.Final pressure processing not only can be used for removing fast the moisture content that is deposited in the lip-deep pulp layer of mould, but also can obtain the good density of material that deposited especially, particularly thick fibrous material layer, therefore, it can obtain the outline stability of height for final products
By suitably selecting the distribution of granularity and mould pellet, can obtain the porosity of desired mould, the composition on this permeable mould surface both can obtain fixing perfect condition with compound between the pellet, the size that can be suitable for porosity again, the unnecessary pressure of avoiding passing material thickness and causing falls, and this material there is no need dense like this.
Said process of mentioning in the practicality and mould can be used for producing the manufacturing of various fibrous suspension goods, and the production that contains the member of various auxiliary material at present, this auxiliary material are necessary for produce connection in by the material layer that suction obtained on the mould.
Can be thus completed by using gaseous working medium to make the fluidisation fiber raw material be deposited on the shifting out in fact of member that forms on the shaping outer surface on mould surface, promptly use the air duct of compressed air by mould, member is affected, thereby finishes the demoulding.Yet in fact member remains quite soft, therefore, in order from mold, to shift out member, preferably use and shift mould, shift out member in order to reach from mold outer surface, and successively member being put into the purpose of delivering to drying room on the conveyer belt, this transfer mould is suitable for interacting with not producing towards the component surface of the outer surface of described finishing die.Also available within the scope of the invention above-mentioned particulate composite is made such transfer mold,, described material granule produces a kind of open type, firm structure by being bonded together, have the path that leads to mold outer surface in this structure, and be connected to produce suction effect with a vacuum source.
Shifting mould can directly make based on the member in the mold, make on the one side on this member with the first auxiliary mould (die) that gypsum is made away from said mold, make on this first auxiliary mould (die) with the second auxiliary mould (punch) that gypsum is made, and said transfer mould (die) just directly forms on this second auxiliary mould.
Before deposition process begins or before the transfer process, must keep the cleaning of permeable die face, be about to it and be exposed in the air, make air flow as gaseous medium by the passage in the mould.
Reaching of using among the present invention can be processed in such a way by the mould that pellet composites constituted, that is, use is back or under abrasion condition, it can be used as the granular constituent material of mould and is recycled once more.
Processing for the slurry that is easy to draining, according to the present invention, for fiber raw material, at least can partly use and contain long stapled original material, a this long fiber original material part can be treated as slurries by shaking out in pulper, another part can also be handled by pre-separation, the dried stone roller process of control, and original material just can be divided into dosage and be separated into filament by this method, at this, member will be processed by the slurry that produces.
In order to make the required slurry of tool member, in the process of fiber raw material, appear in the middle of all scenario as the use of the pulper of basic step, particularly when fiber raw material with the form (such as waste paper) of all-round contract material when providing.
In pulper, raw-material each part phase mutual friction produces powerful rotation, thereby produces fragmentation and raw material will be separated into fiber.
Particularly using under the situation of pure material not, resemble under the situation of waste paper and recycled writing paper, the separation that hope is finished will be carried out effectively, therefore, the fiber that separates shows higher additional treatments degree than the fiber of back separation earlier, in other words, the processing procedure of pulper is uncontrollable in the process of itself, and is therefore also just impure.Said additional processes will cause the increase of lapping degree (° SR-Schoppor-Riegler) and the increase of the viscosity in the pulper, the follow-up drainage of the opposite member that it has influenced from pulping to be processed, and increased the contraction of member in material draining and material dry run.
According to the present invention, this method makes adds a kind of fiber raw material at least in part in pulper, fiber in this fiber raw material has been separated into filament to a certain extent, and Here it is can be rapider and obtain the reason of autogenous grinding effect and mixed effect simultaneously in pulper.When pulper was handled more uniform raw material, the same mill degree that obtains by autogenous grinding in pulper also can be adjusted to more even.The adhesion of water will more can have been controlled in the slurries of above-mentioned disengaging pulper.
Yet same process also can be brought other advantage, and it is valuable especially in the recycle of waste paper.
Recycled waste paper has many different qualities and grade, if this material separated before shaking out in slurries, the dry grinding of control is arranged, and usually just can use a kind of ratio only to carry out separating treatment more cheap rudimentary material of material therefor when shaking out in pulper.
Therefore the pre-separation dry grinding just can a kind of specific method separate original material as a step in a kind of multistage process as mentioned above.
With a kind of specific process, can fiber and the pellet that the waste paper material that resemble plastics, waterproof paper, plastics force fit plate and paper is separated into required degree will be contained.Isolated is not that the component of paper must be screened before entering pulper, perhaps can make these pulverized components enter following production process.
In an embodiment of this method, be added in the interior established slurries of pulper, and stand shaking out of a specified time through the long fiber original material that separates, has the dry grinding process of control.
Can process a member by this way, the major part of its fibrous material utilizes the aquagel fibre adhesive bonding, and another part mixes with the air suspension fibrous material, its bonding glue that then uses usually.
Proved already, in this way, just defeasible traditional whole by the bonding slurries of hydrogel adhesive, therefore, just can significantly reduce the draining and the production time of object, further, owing to can accurately control strength characteristics by adding glue, this method also just can the strict strength characteristics of controlling required member.
These advantages for utilize described liposuction technique carry out large-scale stable shaped member economy, reasonably suitability for industrialized production is crucial.
Such as utilizing a pulverizer, be also referred to as shredding machine and process, succeeded by the post processing of carrying out with grinder, to carry out the multi-stag dry grinding.A certain size the material that said grinder receives after shredding machine processing carries out further attrition process, and if necessary, can its be added to shake out processing in the pulper before, these materials are further dry grinded to particular size.
According to the present invention, before in pulper, shaking out, equally also provide the possibility of utilizing recycled waste paper jointly to separation, the control dry grinding operation that fiber raw material proposed.At this moment the member of making is shrinkproof certainly and is constant dimension.The initial fiber of high wood fibre content will cause less contraction, because this fiber is a cellulose fibre.The result proves, the method according to this invention adds a large amount of cheap recycled writing paper raw material in the wood fibre paper material, also be possible comprising not necessarily wooden waste paper box.By means of to raw-material pre-separation, control dry grinding, just may make a kind of like this slurries, it can not make the member of being processed have undesirable contraction.
Utilize additional materials, resemble filler, chemical substance, adhesive and wait that to process the fluidisation fiber raw material be well-known principle to make member.Additional materials has determined intensity, the hardness of the member of manufacturing, big or small or weak, the soft absorbability of transparency.The present invention also has superiority on these additional materials of application.
In fact each step in the multistage process has increased and has added the attached possibility that helps material in each step in whole process.The open architecture of the final slurry that is obtained is the result of this special invention.For additional materials, it can obtain a kind of good path.Thereby adhesives can gather more or less in component surface, to increase wall intensity.In carrying out pre-separation, control dry grinding process, increase the attached material that helps and to make attached helping in the integral body that material is evenly distributed on processing fiber.Certainly also can be added to additional materials in the pulper.
Furtherly, within the scope of the present invention, shaking out as a process of carrying out in pulper depends on pre-separation, control dry grinding.In other words, self the dry grinding degree that is obtained in pulper can be regulated according to the dry grinding degree that carries out in pre-dry grinding step.For example, a kind of paper pulp, it is processed into conventional state in pulper, and it obtains 60 ° of SR dry grinding degree (Schopper-Riegler) in autogenous grinding, add the fibrous material through dry grinding in this paper pulp, and is after mixing, common through the processing more than 5 minutes.The member that utilizes this mixed serum to make can have king-sized thickness, porosity and permeability.This relatively thick with regard to meaning that product has good drainage and therefore has.
The slurries of easy draining constructed in accordance evenly add fibrous suspension on mould be not difficult, even also be like this when processing relatively thick member.
Waste paper also claims recycled writing paper, and it is a kind of multicomponent compound, and contains the fiber of multiple different length.Yet, facts have proved that when paper wood during as a part of material of process, average fiber length can be more greatly.Guarantee to obtain above-mentioned have good especially drainage and structural advantage.
Method of the present invention equally also is suitable for the processing of virgin material.
Claims (22)
1, on shaping base, the fiber raw material slurries is aspirated, thereby fluidisation fibrous material slurries are deposited on this shaping base, form the processing method of dimensionally stable member, it is characterized in that, using this method is added on the slurries that are made of the fluidisation fiber raw material on the said pedestal, it is easy to discharge a certain amount of water, the carrying out of swabbing action and control are carried out in some way, thereby by suction the fibrous raw material layer is deposited on the said pedestal with certain thickness, this thickness guarantees the requirement of the required dimensional stability of member basically.
2, method according to claim 1, it is characterized in that, the wall thickness of fiber raw material layer has a place or many places difference, this thickness different distributions is on whole material layer, and by having the swabbing action that corresponding topical changes, aspirate processing jointly and produce making the required fiber pulp amount of whole member.
3, method according to claim 2 is characterized in that, fiber raw material deposits with the thickness corresponding to required form stability, and this process is to compare the cross-linked network lattice structure with relatively thick by formation with other zones to realize.
4, require any one described method in 1～3 according to aforesaid right, it is characterized in that, for the easy draining slurries that fiber raw material is made are pumped to required wall thickness, use a kind of mould, it can permeate pneumatic working media under suction function, it has a die surface that can see through working media, and the permeability of mould can be regulated, so that it is transferred under the swabbing action to this surface sizing liquor the thickness of the fiber raw material layer of deposition.
5, method according to claim 4, be used to realize claim 2 or 3 described methods, it is characterized in that using a kind of like this mould, the permeability of its die surface has variation, they are respectively corresponding under swabbing action, deposit to the variation of the wall thickness of the variation of local wall thickness of the easy draining fiber pulp layer on the said die surface or required cross-linked network lattice structure.
6, method according to claim 4, it is characterized in that, for being pumped to desired thickness by the easy draining slurries that fiber raw material is made, use a kind of mould, it can permeate pneumatic working media under suction function, at least the mould of its formation member gabarit partly, be to use particulate composite to make, these particulate material are fixed together to make the die surface of dimensionally stable, define the open type path simultaneously, so that working media passes through this composite until this mold outer surface, the thickness that forms the composite layer of die surface at least can be adjusted at the thickness that the swabbing action deposit of slurries is arrived this lip-deep fiber raw material layer.
7, method as claimed in claim 5, it is characterized in that, use a kind of like this mould, the thickness that forms the composite layer of this die surface on it will change, this variation changes according to the local thickness of the easy draining fiber pulp layer that deposits on this die surface under swabbing action respectively, or the varied in thickness of required cross-linked network lattice structure and changing.
8, according to any one described method in the claim 4～7, it is characterized in that use a kind of like this mould, its permeable surface is made up of varigrained particulate material, die surface pellet partly is smaller forming, and it is then big to support pellet partly at low layer.
9, method according to claim 8 is characterized in that, uses a kind of like this mould, and the particulate material on it is coated by the layer that forms with adhesive.
10, method according to claim 9 is characterized in that, uses a kind of like this mould, and the adhesive on it is thermoset.
11, method according to claim 9 is characterized in that, uses a kind of like this mould, and the adhesive on it contains adhesion promotor.
12, method according to claim 8 is characterized in that, uses a kind of like this mould, and particulate material is circular on it.
13, method according to claim 8 is characterized in that, uses a kind of like this mould, is combined with each other with wedge shape between the particulate material on it.
14, according to claim 5 or 6 described methods, it is characterized in that, use a kind of like this mould, link by the Rapid Thermal melt-phase between base portion is with the composite particles material in the lower part, the particulate material of these other parts of mould then by the sclerosis bonding connection together.
It according to any one described method in the claim 4～14, it is characterized in that 15, use a kind of like this mould, its die surface has certain intensity, so that can carry out the final pressure processing of member.
16, according to the described method of aforementioned any one claim, it is characterized in that, use to small part and to contain long stapled original material as fibrous raw material and be processed into slurries, a part is shaken out in pulper, another part then passes through pre-separation, the dry grinding of control is arranged, and like this, this original material just is separated into certain dosage and is separated into fibrous, then, member just creates from the slurries of making thus.
17, method according to claim 16 is characterized in that, pre-separation control dry grinding production process divides a plurality of steps to carry out.
According to claim 16 or 17 described methods, it is characterized in that 18, the process of shaking out depends on as controlled production process separates the dry grinding process.
19, according to any one described method in the claim 16～18, it is characterized in that, through separation, long fiber original material after the control dry grinding is added in the pulper in the Manufactured slurries with certain dosage, and through the process of shaking out of a specified time.
According to any one described method in the claim 16～19, it is characterized in that 20, the interpolation of auxiliary material is connected with pre-separation dry grinding process and carries out.
According to any one described method in the claim 16～20, it is characterized in that 21, the interpolation of auxiliary material is to carry out in making the further application process of slurries.
22, according to any one described method in the claim 16～21, it is characterized in that slurries create as described in claim 16, and these slurries are added to certain dosage in the another kind of slurries of having made, then, member creates from the mixed liquor of making like this.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK5924/88 | 1988-10-25 | ||
| DK592488A DK168020B1 (en) | 1988-10-25 | 1988-10-25 | PROCEDURE FOR THE PREPARATION OF FORM STABLE ARTICLES FROM A FLUIDIZED CELLULOSE FIBER MATERIAL |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1042389A true CN1042389A (en) | 1990-05-23 |
| CN1025060C CN1025060C (en) | 1994-06-15 |
Family
ID=8146198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89108946A Expired - Fee Related CN1025060C (en) | 1988-10-25 | 1989-10-25 | Method for manufacture of contour stable objects |
Country Status (20)
| Country | Link |
|---|---|
| EP (1) | EP0441835B1 (en) |
| CN (1) | CN1025060C (en) |
| AT (1) | AT398093B (en) |
| AU (1) | AU636585B2 (en) |
| BR (1) | BR8905455A (en) |
| CA (1) | CA2001296A1 (en) |
| CH (1) | CH677944A5 (en) |
| DE (1) | DE3991216T (en) |
| DK (1) | DK168020B1 (en) |
| ES (1) | ES2017055A6 (en) |
| FI (1) | FI98549C (en) |
| GB (2) | GB2243575B (en) |
| GR (1) | GR890100687A (en) |
| MX (1) | MX169792B (en) |
| NL (1) | NL8921150A (en) |
| NO (1) | NO911634L (en) |
| NZ (1) | NZ231149A (en) |
| PT (1) | PT92098A (en) |
| SE (1) | SE467469B (en) |
| WO (1) | WO1990004678A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113423889A (en) * | 2019-01-24 | 2021-09-21 | 瓦登加工私人有限公司 | Apparatus and process for molding pulp fiber products |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2667882B1 (en) * | 1990-10-12 | 1993-01-22 | Anacellulose | PROCESS FOR MANUFACTURING CONFORMED PARTS FROM PAPER PULP AND DEVICE FOR IMPLEMENTING SAME. |
| JP2836800B2 (en) * | 1992-03-06 | 1998-12-14 | 日本碍子株式会社 | Papermaking mold, papermaking method and papermaking apparatus for fiber molded product, and paper made fiber molded product |
| JP2836801B2 (en) * | 1992-03-06 | 1998-12-14 | 日本碍子株式会社 | Papermaking mold, papermaking method and papermaking apparatus for fiber molded product, and paper made fiber molded product |
| DE4402318A1 (en) * | 1994-01-27 | 1995-08-03 | Gerhard Dipl Chem Huber | Simple, economic process for prodn. of high quality tubes from paper |
| FR2776224B1 (en) * | 1998-03-20 | 2000-05-26 | Kerlane | THIN PARTS OF MINERAL FIBERS, METHOD AND MOLD FOR THEIR MANUFACTURE BY VACUUM SUCTION |
| US7370788B1 (en) | 1998-12-28 | 2008-05-13 | Kao Corporation | Formed body |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE900261C (en) * | 1944-07-04 | 1953-12-21 | Schiess Ag | Molding process |
| DE803085C (en) * | 1948-12-09 | 1951-02-26 | Kurt Mueller Dr | Method and device for the production of thick-walled molded fibrous material |
| US2718826A (en) * | 1952-01-17 | 1955-09-27 | Central Fibre Products Company | Pulp molding dies |
| US2851931A (en) * | 1955-04-04 | 1958-09-16 | Pacific Pulp Molding Company | Porous sintered metal molding die |
| DE1061670B (en) * | 1955-04-07 | 1959-07-16 | Hausser O & M | Process for the production of hollow bodies of figurative formation from malleable moisture-containing mass |
| US2981330A (en) * | 1956-12-20 | 1961-04-25 | Diamond National Corp | Pulp molding die |
| GB954305A (en) * | 1960-03-30 | 1964-04-02 | Diamond National Corp | Improvements in or relating to the molding of pulp articles |
| GB898416A (en) * | 1960-04-13 | 1962-06-06 | Bemis Bro Bag Co | Molding forms and method of making them |
| FR1284406A (en) * | 1961-03-21 | 1962-02-09 | Diamond National Corp | Method and device for molding objects of paper pulp |
| US3325349A (en) * | 1964-03-18 | 1967-06-13 | Diamond Int Corp | Method and mold for controlling stock thickness in a pulp molding operation |
| US3325345A (en) * | 1966-02-21 | 1967-06-13 | Owens Illinois Inc | Process of forming water-laid products from cellulosic pulp containing polymeric thermoplastic particles |
| US3533906A (en) * | 1967-10-11 | 1970-10-13 | Haigh M Reiniger | Permanently reacted lignocellulose products and process for making the same |
| FR2356488A1 (en) * | 1976-06-29 | 1978-01-27 | Sepr | PROCESS AND APPARATUS FOR OBTAINING HIGH-PRECISION MOLDED PARTS IN FIBROUS MATERIALS |
| 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 |
| LU83899A1 (en) * | 1982-01-26 | 1983-09-02 | Terre Asbl | INSULATING PANEL |
| FR2573845B1 (en) * | 1984-11-28 | 1988-02-12 | Lafarge Refractaires | METHOD AND DEVICE FOR OBTAINING A THERMAL INSULATION PART FOR A CYLINDRICAL OBJECT, AND PART OBTAINED BY THE PROCESS |
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1988
- 1988-10-25 DK DK592488A patent/DK168020B1/en not_active IP Right Cessation
-
1989
- 1989-10-24 CA CA002001296A patent/CA2001296A1/en not_active Abandoned
- 1989-10-25 DE DE19893991216 patent/DE3991216T/de not_active Withdrawn
- 1989-10-25 NL NL8921150A patent/NL8921150A/en unknown
- 1989-10-25 CN CN89108946A patent/CN1025060C/en not_active Expired - Fee Related
- 1989-10-25 NZ NZ231149A patent/NZ231149A/en unknown
- 1989-10-25 PT PT92098A patent/PT92098A/en not_active IP Right Cessation
- 1989-10-25 ES ES8903596A patent/ES2017055A6/en not_active Expired - Lifetime
- 1989-10-25 AU AU44950/89A patent/AU636585B2/en not_active Ceased
- 1989-10-25 AT AT0903089A patent/AT398093B/en not_active IP Right Cessation
- 1989-10-25 CH CH2211/90A patent/CH677944A5/de not_active IP Right Cessation
- 1989-10-25 WO PCT/DK1989/000250 patent/WO1990004678A1/en active IP Right Grant
- 1989-10-25 BR BR898905455A patent/BR8905455A/en not_active Application Discontinuation
- 1989-10-25 MX MX018108A patent/MX169792B/en unknown
- 1989-10-25 GR GR890100687A patent/GR890100687A/en unknown
- 1989-10-25 EP EP89912229A patent/EP0441835B1/en not_active Expired - Lifetime
-
1991
- 1991-04-24 GB GB9108931A patent/GB2243575B/en not_active Expired - Fee Related
- 1991-04-24 SE SE9101242A patent/SE467469B/en not_active IP Right Cessation
- 1991-04-24 GB GB9108932A patent/GB2251402B/en not_active Expired - Fee Related
- 1991-04-24 NO NO91911634A patent/NO911634L/en unknown
- 1991-04-25 FI FI912005A patent/FI98549C/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113423889A (en) * | 2019-01-24 | 2021-09-21 | 瓦登加工私人有限公司 | Apparatus and process for molding pulp fiber products |
Also Published As
| Publication number | Publication date |
|---|---|
| NO911634L (en) | 1991-06-24 |
| NO911634D0 (en) | 1991-04-24 |
| AU4495089A (en) | 1990-05-14 |
| FI912005A0 (en) | 1991-04-25 |
| DE3991216T (en) | 1991-11-21 |
| EP0441835B1 (en) | 1996-01-03 |
| GB9108932D0 (en) | 1991-06-19 |
| GB2251402A (en) | 1992-07-08 |
| MX169792B (en) | 1993-07-26 |
| GB2243575B (en) | 1992-11-18 |
| GB2251402B (en) | 1993-06-23 |
| WO1990004678A1 (en) | 1990-05-03 |
| CA2001296A1 (en) | 1990-04-25 |
| NZ231149A (en) | 1992-10-28 |
| NL8921150A (en) | 1991-08-01 |
| ATA903089A (en) | 1994-01-15 |
| GB2243575A (en) | 1991-11-06 |
| DK592488D0 (en) | 1988-10-25 |
| GR890100687A (en) | 1990-11-29 |
| AT398093B (en) | 1994-09-26 |
| DK168020B1 (en) | 1994-01-17 |
| AU636585B2 (en) | 1993-05-06 |
| SE9101242D0 (en) | 1991-04-24 |
| SE467469B (en) | 1992-07-20 |
| CN1025060C (en) | 1994-06-15 |
| FI98549C (en) | 1997-07-10 |
| BR8905455A (en) | 1990-05-29 |
| DK592488A (en) | 1990-04-26 |
| PT92098A (en) | 1990-04-30 |
| EP0441835A1 (en) | 1991-08-21 |
| CH677944A5 (en) | 1991-07-15 |
| ES2017055A6 (en) | 1990-12-16 |
| SE9101242L (en) | 1991-04-24 |
| GB9108931D0 (en) | 1991-06-19 |
| FI98549B (en) | 1997-03-27 |
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