CA2027848A1 - Method for the manufacture of shaped parts - Google Patents
Method for the manufacture of shaped partsInfo
- Publication number
- CA2027848A1 CA2027848A1 CA002027848A CA2027848A CA2027848A1 CA 2027848 A1 CA2027848 A1 CA 2027848A1 CA 002027848 A CA002027848 A CA 002027848A CA 2027848 A CA2027848 A CA 2027848A CA 2027848 A1 CA2027848 A1 CA 2027848A1
- Authority
- CA
- Canada
- Prior art keywords
- pressure
- pressing step
- board
- mechanically stable
- web
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 11
- 239000001913 cellulose Substances 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 239000011094 fiberboard Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000000123 paper Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 4
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
- 229920001568 phenolic resin Polymers 0.000 claims 1
- 229940106135 cellulose Drugs 0.000 abstract 1
- 235000010980 cellulose Nutrition 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000013067 intermediate product Substances 0.000 description 3
- 239000011093 chipboard Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229940035564 duration Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/12—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor of articles having inserts or reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/06—Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Paper (AREA)
Abstract
DCL/ch-B
METHOD FOR THE MANUFACTURE OF SHAPED PARTS
The invention relates to the manufacture of shaped parts made of particles containing lignocellulose and / or cellu-lose; the particles are at least essentially brought into fibrous form and the mat formed with the particles is brought into the shape of a mechanically stable board by the use of pressure and heat, and the desired, notably three-dimensional, end product is produced from such mechanically stable at least essentially hardened plate-shaped board con-tinuously and / or discontinuously in a further heated pressing step, using a comparatively substantially higher pressure. A veneer layer can also be applied on one or both sides of the board, either during the formation of the mat or during the further heated pressing step.
METHOD FOR THE MANUFACTURE OF SHAPED PARTS
The invention relates to the manufacture of shaped parts made of particles containing lignocellulose and / or cellu-lose; the particles are at least essentially brought into fibrous form and the mat formed with the particles is brought into the shape of a mechanically stable board by the use of pressure and heat, and the desired, notably three-dimensional, end product is produced from such mechanically stable at least essentially hardened plate-shaped board con-tinuously and / or discontinuously in a further heated pressing step, using a comparatively substantially higher pressure. A veneer layer can also be applied on one or both sides of the board, either during the formation of the mat or during the further heated pressing step.
Description
DCL/ch-B
METHOD FOR T~E MANUFACTURE OF SHAPED PARTS
Field of the invention:
The invention relates to a method for the manufacture of shaped parts from particles containing lignocellulose and / or cellulose mixed with a heat curable binder, in which a mat is firstly formed on a support, this mat is brought under pressure and heat into the form of a board and is then transformed into tne stable end shape by a further pressing step taking place under pressure and heat.
Background of the invention:
From German patent 27 29 687 is known a method which serves for the manufacture o~ shaped workpiece blanks for seat shells, for cover plates having shaped portions and for simi-lar products, these blanks being made of particles contai-ning lignocellulose, notably chips, mixed with a thermo-plastic binder and formed into a mat, the particles having a humidity content lower than 9 ~ related to the dry ~eight, and the blanks being prepared by heating without pressure and then by compression under pressure and heat and by vapor separation or evaporation of the humidity. The vapor separa-tion of the humidity is in this case effected before the pressing step during the heating without pressure for a time period which is at least about twice to four times the dura-tion of the pressing step, and thus higher than the press time necessary for the manufacture of chipboards.
Although this method can be used when thermoplastic binders are employed, it results however only in the production of shaped workpiece blanks to be subsequently shaped, whereby the entire pressing procee prior to the subsequent shaping of the shaped workpiece blanks requires a longer time period than the pressing process for the manufacture of chipboards.
A method for the manufacture of doors, furniture doors or panel members is known from US patent 48 12 188, in which a plate which is only slightly prepressed is firstly prepared from wood fibers or wood chips with the use of a heat curab-le binder which is only partially activated, and this plate is covered with paper or veneer. In this case the binder between the plate and the paper or the veneer is also only partially activated, such that the structure formed by the plate covered with paper or veneered has a leather-like and correspondingly flexible structure. This intermediate pro-duct having a leather-like consistency is brought into the final shape during a subsequent pressing and heating step in a corresponding shaping press with a simultaneous densifica-tion of this intermediate product and curing of the binder.
In this case the plate, which is usable as a door, a furni-ture door or a panel member, can be provided with surface-chiefs, i. e. a shaped or structured surface.
Object of the invention:
The object of the invention is to further develop the method mentioned at the beginning such that plates which are alrea-dy mechanically stable and usable as rear walls for furni-ture, as door panels or as parts of floor or roof members for prefabricated housing can be transformed when required into shaped parts, notably three-dimensional parts, in a par-ticularly economical manner.
Summary of the invention:
This object is met according to the invention essentially in that particles containing lignocellulose and / or cellulose which have been brought into at least predominantly fibrous form and which can also be short and woolly are used, in that the web is brought, continuously and / or discontinuous-ly, by the use of pressure and heat into the form of a fiber board which is mechanically stable in itself, and in that the already mechanically stable and at least essentially hardened board is pressed continuously and / or disconti-nuously in a further heated pressing step, using a compara-tively substantially higher pressure, into the desired end shape, which is in particular a three dimensional end shape.
Owiny to the cooperation of these measures it is possible to manufacture, in an extremely surprising manner, shaped parts of high quality and stability, it being of particular signi-ficance from an economic viewpoint that boards which are practically already finished and therefore suitable for in-termediate storage as well as usable for other purposes can be used as a starting material for the shaping compression step.
Particularly advantageous developments of the method of the invention are set forth in the subordinate claims.
The temperatures and pressures used during the shaping com-pression step, which are unusually high in comparison to those used in normal board manufacture, make it possible, to manufacture shaped parts from practically already finished boards and not only from boards which represent intermediate products or blanks, boards with the manufacture of the shaped parts being of unexpected quality in all respects according to the surface quality, the mechanical stability and above all the multiplicity of possible shapes.
Detailed description of the invention:
In the following the principles of the method according to the invention will be explained in detail with reference to a specific embodiment.
The starting materials are chopped wooden chips which are broken up into fiber particles in a refiner, are then dried to a humidity content of 8 to 12 % and are mixed during the drying step with about 9 % of a mixture of urea resin and paraffin with reference to absolutely dried fibers par-ticles.
Thereafter a mat having an appropriate thickness or height is formed and passes in succession into a pre-compressor, an RF heating station and into the press gap of a press in accordance with the proven operating calender principle. As regards the technology of the machine reference is made here to the document "Holz als Roh- und Werkstoff" (Wood as Source and Work Material), January 1977, book 1, backside o~
the front page.
After a certain time the mat leaves the press gap of this press as a mechanically stable and hardened continuous board having a humidity content of 6 to 8 % and is divided without subsequent heat treatment into board formats of desired length. A technique usable to this end is described for example in East German patent 250 290.
The bulk density of the boards obtained with a thickness of for example 4 mm is in this case 620 kg/m3. This bulk densi-ty is higher than 600 kg/m3 and preferably lower than ' - 5 - h ~ç, 650 kg/m3.
Finally these plates are pressed continuously and / or dis-continuously in a further heated compression step with the use of a comparatively substantially higher pressure than in the first compression step into shaped parts, in particular three-dimensional parts, havin~ a thickness of 2,2 mm and a bulk density of about 1100 kg/m3. For the preheating and the pressing steps a total time of about one to two minutes is sufficient.
The pressure used during the final shaping ranges from 3 to 10 N/mm2 and the temperature is comprised in a range from 170~ C to 190 C.
Before the final shaping pressing step the mechanically stable boards can also be preheated during a predetermined time duration. This preheating can be carried out without pressure and preferably the duration of the preheating of the fiber board is about the same as the pressing time du-ring the final pressing step.
According to a further development of the method of the in-vention, during the pressing step which serves to the final shaping, the pressure is firstly briefly increased to a maxi-mal pressure and subsequently lowered to a significantly lower pressure. As an example the briefly applied high spe-cific pressure is about 100 bar and the reduced specific pressure applied thereafter is about 60 to 70 bar.
Further, as a binder for notably comparatively thin and com-mercially available fiber boards, the invention contemplates the use of urea resin or phenol resin or similar resins and the hardened resin proportion is selected to be in the range of about 9 to about 15 wt.-% of the source materials.
- 6 ~ V f The veneer layer can be applied on one side or on both sides of the boards or plates either during the formation of the mat or before the final pressing step taking place under pressure and heat.
The veneer web itself can be advantageously a plastic film, a paper web and notably a paper web impregnated with a deco-rative resin. It can also be made either of an at least essentially water pervious or water impervious material.
The provision of the veneer layer during the manufacturing steps of the board or plate is particularly advantageous, not only on an economical viewpoint but also because it per-mits to obtain any desired surface finishing including smooth surfaces/ water impervious surfaces and decorative paterns or designs.
'
METHOD FOR T~E MANUFACTURE OF SHAPED PARTS
Field of the invention:
The invention relates to a method for the manufacture of shaped parts from particles containing lignocellulose and / or cellulose mixed with a heat curable binder, in which a mat is firstly formed on a support, this mat is brought under pressure and heat into the form of a board and is then transformed into tne stable end shape by a further pressing step taking place under pressure and heat.
Background of the invention:
From German patent 27 29 687 is known a method which serves for the manufacture o~ shaped workpiece blanks for seat shells, for cover plates having shaped portions and for simi-lar products, these blanks being made of particles contai-ning lignocellulose, notably chips, mixed with a thermo-plastic binder and formed into a mat, the particles having a humidity content lower than 9 ~ related to the dry ~eight, and the blanks being prepared by heating without pressure and then by compression under pressure and heat and by vapor separation or evaporation of the humidity. The vapor separa-tion of the humidity is in this case effected before the pressing step during the heating without pressure for a time period which is at least about twice to four times the dura-tion of the pressing step, and thus higher than the press time necessary for the manufacture of chipboards.
Although this method can be used when thermoplastic binders are employed, it results however only in the production of shaped workpiece blanks to be subsequently shaped, whereby the entire pressing procee prior to the subsequent shaping of the shaped workpiece blanks requires a longer time period than the pressing process for the manufacture of chipboards.
A method for the manufacture of doors, furniture doors or panel members is known from US patent 48 12 188, in which a plate which is only slightly prepressed is firstly prepared from wood fibers or wood chips with the use of a heat curab-le binder which is only partially activated, and this plate is covered with paper or veneer. In this case the binder between the plate and the paper or the veneer is also only partially activated, such that the structure formed by the plate covered with paper or veneered has a leather-like and correspondingly flexible structure. This intermediate pro-duct having a leather-like consistency is brought into the final shape during a subsequent pressing and heating step in a corresponding shaping press with a simultaneous densifica-tion of this intermediate product and curing of the binder.
In this case the plate, which is usable as a door, a furni-ture door or a panel member, can be provided with surface-chiefs, i. e. a shaped or structured surface.
Object of the invention:
The object of the invention is to further develop the method mentioned at the beginning such that plates which are alrea-dy mechanically stable and usable as rear walls for furni-ture, as door panels or as parts of floor or roof members for prefabricated housing can be transformed when required into shaped parts, notably three-dimensional parts, in a par-ticularly economical manner.
Summary of the invention:
This object is met according to the invention essentially in that particles containing lignocellulose and / or cellulose which have been brought into at least predominantly fibrous form and which can also be short and woolly are used, in that the web is brought, continuously and / or discontinuous-ly, by the use of pressure and heat into the form of a fiber board which is mechanically stable in itself, and in that the already mechanically stable and at least essentially hardened board is pressed continuously and / or disconti-nuously in a further heated pressing step, using a compara-tively substantially higher pressure, into the desired end shape, which is in particular a three dimensional end shape.
Owiny to the cooperation of these measures it is possible to manufacture, in an extremely surprising manner, shaped parts of high quality and stability, it being of particular signi-ficance from an economic viewpoint that boards which are practically already finished and therefore suitable for in-termediate storage as well as usable for other purposes can be used as a starting material for the shaping compression step.
Particularly advantageous developments of the method of the invention are set forth in the subordinate claims.
The temperatures and pressures used during the shaping com-pression step, which are unusually high in comparison to those used in normal board manufacture, make it possible, to manufacture shaped parts from practically already finished boards and not only from boards which represent intermediate products or blanks, boards with the manufacture of the shaped parts being of unexpected quality in all respects according to the surface quality, the mechanical stability and above all the multiplicity of possible shapes.
Detailed description of the invention:
In the following the principles of the method according to the invention will be explained in detail with reference to a specific embodiment.
The starting materials are chopped wooden chips which are broken up into fiber particles in a refiner, are then dried to a humidity content of 8 to 12 % and are mixed during the drying step with about 9 % of a mixture of urea resin and paraffin with reference to absolutely dried fibers par-ticles.
Thereafter a mat having an appropriate thickness or height is formed and passes in succession into a pre-compressor, an RF heating station and into the press gap of a press in accordance with the proven operating calender principle. As regards the technology of the machine reference is made here to the document "Holz als Roh- und Werkstoff" (Wood as Source and Work Material), January 1977, book 1, backside o~
the front page.
After a certain time the mat leaves the press gap of this press as a mechanically stable and hardened continuous board having a humidity content of 6 to 8 % and is divided without subsequent heat treatment into board formats of desired length. A technique usable to this end is described for example in East German patent 250 290.
The bulk density of the boards obtained with a thickness of for example 4 mm is in this case 620 kg/m3. This bulk densi-ty is higher than 600 kg/m3 and preferably lower than ' - 5 - h ~ç, 650 kg/m3.
Finally these plates are pressed continuously and / or dis-continuously in a further heated compression step with the use of a comparatively substantially higher pressure than in the first compression step into shaped parts, in particular three-dimensional parts, havin~ a thickness of 2,2 mm and a bulk density of about 1100 kg/m3. For the preheating and the pressing steps a total time of about one to two minutes is sufficient.
The pressure used during the final shaping ranges from 3 to 10 N/mm2 and the temperature is comprised in a range from 170~ C to 190 C.
Before the final shaping pressing step the mechanically stable boards can also be preheated during a predetermined time duration. This preheating can be carried out without pressure and preferably the duration of the preheating of the fiber board is about the same as the pressing time du-ring the final pressing step.
According to a further development of the method of the in-vention, during the pressing step which serves to the final shaping, the pressure is firstly briefly increased to a maxi-mal pressure and subsequently lowered to a significantly lower pressure. As an example the briefly applied high spe-cific pressure is about 100 bar and the reduced specific pressure applied thereafter is about 60 to 70 bar.
Further, as a binder for notably comparatively thin and com-mercially available fiber boards, the invention contemplates the use of urea resin or phenol resin or similar resins and the hardened resin proportion is selected to be in the range of about 9 to about 15 wt.-% of the source materials.
- 6 ~ V f The veneer layer can be applied on one side or on both sides of the boards or plates either during the formation of the mat or before the final pressing step taking place under pressure and heat.
The veneer web itself can be advantageously a plastic film, a paper web and notably a paper web impregnated with a deco-rative resin. It can also be made either of an at least essentially water pervious or water impervious material.
The provision of the veneer layer during the manufacturing steps of the board or plate is particularly advantageous, not only on an economical viewpoint but also because it per-mits to obtain any desired surface finishing including smooth surfaces/ water impervious surfaces and decorative paterns or designs.
'
Claims (18)
1. Method for the manufacture of shaped parts from par-ticles containing lignocellulose and / or cellulose mixed with a heat curable binder, in which a mat is firstly formed on a support, this mat is brought by pressure and heat into the form of a board and is then transformed into the stable end shape, by a further pressing step taking place under pressure and heat w h e r e i n particles containing lignocellulose and / or cellulose which have been brought into at least predominantly fibrous form and which can also be short and woolly are used, w h e r e i n the web is brought, continuously and / or discontinuously, by the use of pressure and heat into the form of a fiber board which is mechanical-ly stable in itself, and w h e r e i n the already mechanically stable and at least essentially hardened board is pressed conti-nuously and / or discontinuously in a further heated pressing step, using a comparatively substantially higher pressure, into the desired end shape, which is in particular a three dimensional end shape.
2. Method according to claim 1, w h e r e i n the mechanically stable fiber board obtained after the first pressing step is made to have a bulk density higher than 600 kg/m3.
3. Method according to claim 2, w h e r e i n the mechanically stable fiber board is made to have a bulk density in the range of 600 to 650 kg/m3.
4. Method according to claim 1 and comprising the forming of a mat for the manufacture of comparatively thin plates.
5. Method according to claim 4, w h e r e i n the pressure used in the final pressing step is generally in the range of 3 to 10 N/mm2.
6. Method according to claim 1, w h e r e i n the temperature of the pressing step leading to the end shape is generally in the range of 170° C to 190° C.
7. Method according to claim 1, w h e r e i n the mechanically stable fiber board is preheated during a predetermined period before the final pressing step.
8. Method according to claim 7, w h e r e i n the mechanically stable fiber board is preheated without pressure.
9. Method according to claim 7, w h e r e i n the duration of the preheating of the fiber board is preferably about the same as the pressing time during the final pressing step.
10. Method according to claim 1, w h e r e i n during the pressing step leading to the end shape the pressure is firstly briefly increased up to a maximum value and then decreased to a significantly lower pressure.
11. Method according to claim 10, w h e r e i n the briefly applied high specific pressure is about 100 bar and the subsequent reduced specific pressure is about 60 to 70 bar.
12. Method according to claim 1, w h e r e i n a resin selected among urea resin, phenolic resin or similar, is used as a binder in par-ticular for comparatively thin and commercially avai-lable fiber boards and the proportion of hardened resin is selected to be in the range of e. g. circa 9 to circa 15 wt.-% of the source materials.
13. Method according to claim 1, w h e r e i n the mat is provided on at least one side with a veneer web during its formation.
14. Method according to claim 1, w h e r e i n the already mechanically stable and at least essentially hardened board is provided on at least one side with a veneer board during the further heated pressing step.
15. Method according to claim 11, w h e r e i n the veneer web is made of a material selected among plastic film, paper web or a paper web impregnated with a decorative resin.
16. Method according to claim 14, w h e r e i n the veneer web is made of a material selected among plastic film, paper web or a paper web impregnated with a decorative resin.
17. Method according to claim 13, w h e r e i n the veneer web is made of a material selected among at least essentially water pervious and at least substantially water impervious materials.
18. Method according to claim 14, w h e r e i n the veneer web is made of a material selected among at least essentially water pervious and at least substantially water impervious materials.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3935421 | 1989-10-24 | ||
| DEP3935421.0 | 1989-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2027848A1 true CA2027848A1 (en) | 1991-04-25 |
Family
ID=6392111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002027848A Abandoned CA2027848A1 (en) | 1989-10-24 | 1990-10-17 | Method for the manufacture of shaped parts |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0424909A3 (en) |
| JP (1) | JPH03207602A (en) |
| KR (1) | KR910007651A (en) |
| CA (1) | CA2027848A1 (en) |
| DE (1) | DE4033849A1 (en) |
| FI (1) | FI905249A7 (en) |
| RU (1) | RU1836210C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8079390B2 (en) * | 2003-08-29 | 2011-12-20 | Aspenware Inc. | Process of production of disposable wooden cutlery and product thereof |
| US8647547B2 (en) | 2009-07-01 | 2014-02-11 | Lignotech Developments Limited | Processing of lignocellulosic and related materials |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6117924A (en) | 1996-10-22 | 2000-09-12 | Crane Plastics Company Limited Partnership | Extrusion of synthetic wood material |
| US6180257B1 (en) | 1996-10-29 | 2001-01-30 | Crane Plastics Company Limited Partnership | Compression molding of synthetic wood material |
| US6662515B2 (en) | 2000-03-31 | 2003-12-16 | Crane Plastics Company Llc | Synthetic wood post cap |
| US6578368B1 (en) | 2001-01-19 | 2003-06-17 | Crane Plastics Company Llc | Cryogenic cooling of extruded and compression molded materials |
| US7017352B2 (en) | 2001-01-19 | 2006-03-28 | Crane Plastics Company Llc | Cooling of extruded and compression molded materials |
| US6632863B2 (en) | 2001-10-25 | 2003-10-14 | Crane Plastics Company Llc | Cellulose/polyolefin composite pellet |
| NZ515288A (en) * | 2001-11-06 | 2003-07-25 | Lignotech Developments Ltd | Processing of ligno-cellulose materials with steam in a pressure vessel |
| US6780359B1 (en) | 2002-01-29 | 2004-08-24 | Crane Plastics Company Llc | Synthetic wood composite material and method for molding |
| DE10204321B4 (en) * | 2002-02-01 | 2007-05-03 | Fritz Egger Gmbh & Co. | Molded part and method for its production |
| US7186457B1 (en) | 2002-11-27 | 2007-03-06 | Crane Plastics Company Llc | Cellulosic composite component |
| US8074339B1 (en) | 2004-11-22 | 2011-12-13 | The Crane Group Companies Limited | Methods of manufacturing a lattice having a distressed appearance |
| NL1027579C2 (en) * | 2004-11-24 | 2006-05-29 | Trespa Int Bv | Method for deforming a plastic plate. |
| US8167275B1 (en) | 2005-11-30 | 2012-05-01 | The Crane Group Companies Limited | Rail system and method for assembly |
| US7743567B1 (en) | 2006-01-20 | 2010-06-29 | The Crane Group Companies Limited | Fiberglass/cellulosic composite and method for molding |
| US8460797B1 (en) | 2006-12-29 | 2013-06-11 | Timbertech Limited | Capped component and method for forming |
| US7913960B1 (en) | 2007-08-22 | 2011-03-29 | The Crane Group Companies Limited | Bracketing system |
| SE539948C2 (en) | 2016-03-18 | 2018-02-06 | The Core Company Ab | Isostatic pressure forming of heated dry cellulose fibers |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE311227B (en) * | 1962-09-27 | 1969-06-02 | Weyerhaeuser Co | |
| GB2139944A (en) * | 1983-05-19 | 1984-11-21 | James Peter Edward | Bending and moulding wood fibreboard |
| GB8530781D0 (en) * | 1985-12-13 | 1986-01-22 | Evode Ltd | Manufacture of boards |
| EP0324038A1 (en) * | 1988-01-12 | 1989-07-19 | VD-Werkstätten GmbH & Co. KG | Method for producing a furniture front panel, and the furniture front panel so produced |
-
1990
- 1990-10-17 CA CA002027848A patent/CA2027848A1/en not_active Abandoned
- 1990-10-23 RU SU904831468A patent/RU1836210C/en active
- 1990-10-24 KR KR1019900017053A patent/KR910007651A/en not_active Withdrawn
- 1990-10-24 JP JP2284549A patent/JPH03207602A/en active Pending
- 1990-10-24 EP EP19900120407 patent/EP0424909A3/en not_active Withdrawn
- 1990-10-24 FI FI905249A patent/FI905249A7/en not_active IP Right Cessation
- 1990-10-24 DE DE4033849A patent/DE4033849A1/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8079390B2 (en) * | 2003-08-29 | 2011-12-20 | Aspenware Inc. | Process of production of disposable wooden cutlery and product thereof |
| US8647547B2 (en) | 2009-07-01 | 2014-02-11 | Lignotech Developments Limited | Processing of lignocellulosic and related materials |
Also Published As
| Publication number | Publication date |
|---|---|
| KR910007651A (en) | 1991-05-30 |
| RU1836210C (en) | 1993-08-23 |
| FI905249A7 (en) | 1991-04-25 |
| DE4033849A1 (en) | 1991-04-25 |
| FI905249A0 (en) | 1990-10-24 |
| JPH03207602A (en) | 1991-09-10 |
| EP0424909A3 (en) | 1992-01-22 |
| EP0424909A2 (en) | 1991-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |