US3521323A - Plant for producing fiberboard plates and the like - Google Patents
Plant for producing fiberboard plates and the like Download PDFInfo
- Publication number
- US3521323A US3521323A US663576A US3521323DA US3521323A US 3521323 A US3521323 A US 3521323A US 663576 A US663576 A US 663576A US 3521323D A US3521323D A US 3521323DA US 3521323 A US3521323 A US 3521323A
- Authority
- US
- United States
- Prior art keywords
- sheet
- prepress
- plant
- pile
- sheets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011094 fiberboard Substances 0.000 title description 5
- 239000000463 material Substances 0.000 description 7
- 239000007858 starting material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- -1 sawdust Substances 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011236 particulate material Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 241000920033 Eugenes Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
- B27N3/10—Moulding of mats
-
- 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
- B27N3/16—Transporting the material from mat moulding stations to presses; Apparatus specially adapted for transporting the material or component parts therefor, e.g. cauls
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/20—Molding plants
- Y10S425/201—Diverse stations
Definitions
- My present invention relates to a plant for the production of plates of fiberboard or pressed-board type from cellulosic or other particulate material, such as sawdust, wood chips and/or fibers, this material being deposited with or without a hardenable binder and in one or more strata on a movable support for delivery to a heated press adapted to consolidate it into simple or laminated plates.
- cellulosic or other particulate material such as sawdust, wood chips and/or fibers
- the general object of my present invention is to provide means in such system for feeding loosely piled particulate material of the character described to a prepress in a manner eliminating the need for such frames without endangering the continuity of the precompressed cake.
- a more particular object of this invention is to provide means in such system for rapidly delivering a succession of piles of such material to a prepress.
- the foregoing objects are realized by the provision of at least one flexible support sheet for the starting material this support sheet being anchored at one end to a windup mechanism in the immediate vicinity of the prepress whereby the sheet may be coiled into a roll in the manner of a conventional window shade; a sheet of this type, consisting of a low-friction thermoplastic material, such as Teflon (polytetrafluoroethylene), has been described in commonly assigned application Ser. No. 508,653 filed Nov. 19, 1965 by Kurt Loewenfeld and Wolfgang Reiners, now Pat. No. 3,368,242.
- a tensioning device is anchored to the sheet at a location remote from the windup mechanism for the purpose of extending the sheet underneath a hopper adapted to charge the sheet with a pile of starting material.
- the windup mechanism thereupon operates to retract the sheet from the vicinity of the hopper and to transport the pile to the entrance of the prepress.
- the prepress includes an endless band or belt encircling its bed and driven substantially in synchronism with the windup mechanism of the support sheet to receive the pile of starting material from the sheet and to transfer it intact to the prepress for compaction therein, this arrangement eliminating the stresses which might otherwise result upon a pushing of the pile by the support sheet onto the stationary prepress bed.
- Means may be provided at or beyond the prepress for trimming the edges of the emerging cake.
- two or more support sheets of the aforedes'cribed character are provided in vertically spaced relationship and are arranged for alternate charging by a common hopper, the charging of one sheet coinciding with the delivery of the charge of another sheet to the prepress.
- This arrangement considerably speeds up the loading of the prepress and, therefore, the production of fiberboard or similar plates.
- FIG. 1 is a somewhat diagrammatic side-elevational View, partly in section, of a plant embodying my improved transport means;
- FIG. 2 is a view similar to FIG. 1, illustrating an alternate position of the transport means
- FIG. 3 is a top plan view of the transport means taken on the line IHIII of FIG. 1.
- the plant shown in the drawing comprises a dispenser 1 which, as shown, may consist of several hoppers 1a, 1b, designed to deposit several layers of fibrous and/or granular cellulosic or other polymeric starting material, possibly together with a thermally curable binder, on a transport system comprising a pair of vertically spaced sheets 2', 2" of low-friction thermoplastic material, preferably Teflon, adapted to be wound up on respective shafts 21, 21 which are journaled in a frame 22.
- the sheets 2', 2" terminate in cross-bars 23, 23 to which tensioning cords 24', 24" are anchored.
- FIGS. 1 and 3 show the upper sheet 2' retracted by its loading spring and partly wrapped around the shaft 21, the other sheet 2" being fully extended by its tensioning cords 24" which are almost entirely wound around capstan 25";
- FIG. 2 illustrates the reverse position, with sheet 2' extended and sheet 2" withdrawn.
- a prepress 3 has an entrance end positioned close to the frame 22 which may be selectively lowered and raised, e.g. by a hydraulic cylinder 26, to align either the sheet 2' or the sheet 2" with that entrance end.
- An endless belt 11 of pressure-resistant material e.g. steel, surrounds the bed 31 of press 3 and terminates close to the forward end of sheet 2' or 2" so as to be able to receive from it a pile 7 or 7" of deposited material respectively carried by these sheets and entrained by their end bars 23', 23".
- the operating speed of conveyor belt 11 is chosen to be substantially identical with that of the sheet 2' or 2" in the terminal phase of its forward motion so that the charge 7 or 7" can be transferred to the press 3 without disruption, each sheet being unwound after such transfer from its shaft 21' or 21" by the associated capstan 25 or 25" as described above.
- belt 11 With the pile 7 or 7" fully inside the press, belt 11 is halted to allow this pile to be compressed into a relatively firm cake 7a which is thereafter transported by one or more further conveyors 9 to an elevatable stacking rack 4 (of the type disclosed in the aforementioned Siempelkamp Pat. 3,077,271) for delivery to the several levels of a final press 5.
- a stacked output conveyor has been shown at 12.
- a vertically movable cutting frame 13 may be lowered onto conveyor 9 to trim the edges of cake 7a, with temporary halting of that conveyor or with the frame 13 moving at the same forward speed as the conveyor.
- either of the sheets 2', 2" can be charged by the dispenser 1 while the other sheet delivers the charge to the prepress 3.
- the number of superposed transfer sheets, operating at staggered intervals may also be increased.
- a plant for the production of pressed-board plates comprising hopper means for dispensing a particulate starting material to be compressed into such plates, a final press provided with heating means, a prepress disposed between said hopper means and said final press, and transport means for delivering a pile of said starting material to said prepress for precompression therein to form a cake and delivering said cake to said final press for compression and solidification to form a plate, said transport means including flexible support means reciprocable between said hopper means and said prepress and positionable for receiving therefrom a pile of said material to be delivered to said prepress, the latter being provided with a bed and with an endless conveyor encircling said bed, said conveyor being substantially synchronized with said transport means for receiving said pile from said sheet.
- a plant as defined in claim 1 wherein said support means comprises a sheet of polytetrafluoroethylene.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Paper (AREA)
Description
July 2 1, 1970 R; HESCH PL'ANT.FOR PRODUCING FIBERBOARD PL'ATESgAND THE LIKE Filed Aug. 28. 1967 Rolf Hesch I N VEN TOR.
United States Patent 3,521,323 PLANT FOR PRODUCING FIBERBOARD PLATES AND THE LIKE Rolf Hesch, Huls, Krefeld, Germany, assignor to G.
Siempelkamp & Co., Krefeld, Germany, a corporation of Germany Filed Aug. 28, 1967, Ser. No. 663,576 Claims priority, application Germany, Aug. 27, 1966,
Im. or. am 3/134,- B30b 9/28 US. Cl. 18-4 Claims ABSTRACT OF THE DISCLOSURE Several support sheets may be superposed for alternate charging from a common hopper, one sheet receiving a charge while another feeds the prepress.
My present invention relates to a plant for the production of plates of fiberboard or pressed-board type from cellulosic or other particulate material, such as sawdust, wood chips and/or fibers, this material being deposited with or without a hardenable binder and in one or more strata on a movable support for delivery to a heated press adapted to consolidate it into simple or laminated plates. Such systems have been disclosed, for example, in US. Pat. Nos. 3,050,200 and 3,077,271 issued to Eugen Siempelkamp.
It is frequently desirable, particularly if the final press is of the multilevel type, to dispose a prepress between this final press and the dispenser for the loose starting material in order that the initial pile of this material may reach the final press in a somewhat compacted form, thus allowing for a reduced spacing between the heated press platens. Heretofore, the feeding of the loosely piled chips, fibers or the like to the prepress was usually accomplished with the aid of rectangular frames designed to hold the material together during transportation and to define the shape of the precompressed cake. The removal of such frames from the conveyor system after precompression, and the subsequent redeposition of the frames on the movable support, leading to the prepress, required relatively complex machinery.
The general object of my present invention is to provide means in such system for feeding loosely piled particulate material of the character described to a prepress in a manner eliminating the need for such frames without endangering the continuity of the precompressed cake.
A more particular object of this invention is to provide means in such system for rapidly delivering a succession of piles of such material to a prepress.
According to an important feature of my invention, the foregoing objects are realized by the provision of at least one flexible support sheet for the starting material this support sheet being anchored at one end to a windup mechanism in the immediate vicinity of the prepress whereby the sheet may be coiled into a roll in the manner of a conventional window shade; a sheet of this type, consisting of a low-friction thermoplastic material, such as Teflon (polytetrafluoroethylene), has been described in commonly assigned application Ser. No. 508,653 filed Nov. 19, 1965 by Kurt Loewenfeld and Wolfgang Reiners, now Pat. No. 3,368,242. A tensioning device is anchored to the sheet at a location remote from the windup mechanism for the purpose of extending the sheet underneath a hopper adapted to charge the sheet with a pile of starting material. The windup mechanism thereupon operates to retract the sheet from the vicinity of the hopper and to transport the pile to the entrance of the prepress.
Advantageously, in accordance with another feature of my invention, the prepress includes an endless band or belt encircling its bed and driven substantially in synchronism with the windup mechanism of the support sheet to receive the pile of starting material from the sheet and to transfer it intact to the prepress for compaction therein, this arrangement eliminating the stresses which might otherwise result upon a pushing of the pile by the support sheet onto the stationary prepress bed. Means may be provided at or beyond the prepress for trimming the edges of the emerging cake.
According to a more specific feature of my invention two or more support sheets of the aforedes'cribed character are provided in vertically spaced relationship and are arranged for alternate charging by a common hopper, the charging of one sheet coinciding with the delivery of the charge of another sheet to the prepress. This arrangement considerably speeds up the loading of the prepress and, therefore, the production of fiberboard or similar plates.
The invention will be described in greater detail with reference to the accompanying drawing in which:
FIG. 1 is a somewhat diagrammatic side-elevational View, partly in section, of a plant embodying my improved transport means;
FIG. 2 is a view similar to FIG. 1, illustrating an alternate position of the transport means; and
FIG. 3 is a top plan view of the transport means taken on the line IHIII of FIG. 1.
The plant shown in the drawing comprises a dispenser 1 which, as shown, may consist of several hoppers 1a, 1b, designed to deposit several layers of fibrous and/or granular cellulosic or other polymeric starting material, possibly together with a thermally curable binder, on a transport system comprising a pair of vertically spaced sheets 2', 2" of low-friction thermoplastic material, preferably Teflon, adapted to be wound up on respective shafts 21, 21 which are journaled in a frame 22. The sheets 2', 2" terminate in cross-bars 23, 23 to which tensioning cords 24', 24" are anchored. The other ends of these cords are attached to respective capstans 25', 25" which can be alternately driven, by suitable transmissions not shown, to wind up the cords 24' or 24" against the force of loading springs (likewise not shown) that are coupled with the shafts 21', 21" so as to bias the latter counterclockwise as viewed in FIGS. 1 and 2, thereby tending to coil the sheets 2', 2" around these shafts in a manner known from conventional window shades. Thus, FIGS. 1 and 3 show the upper sheet 2' retracted by its loading spring and partly wrapped around the shaft 21, the other sheet 2" being fully extended by its tensioning cords 24" which are almost entirely wound around capstan 25"; FIG. 2 illustrates the reverse position, with sheet 2' extended and sheet 2" withdrawn.
A prepress 3 has an entrance end positioned close to the frame 22 which may be selectively lowered and raised, e.g. by a hydraulic cylinder 26, to align either the sheet 2' or the sheet 2" with that entrance end. An endless belt 11 of pressure-resistant material, e.g. steel, surrounds the bed 31 of press 3 and terminates close to the forward end of sheet 2' or 2" so as to be able to receive from it a pile 7 or 7" of deposited material respectively carried by these sheets and entrained by their end bars 23', 23". The operating speed of conveyor belt 11 is chosen to be substantially identical with that of the sheet 2' or 2" in the terminal phase of its forward motion so that the charge 7 or 7" can be transferred to the press 3 without disruption, each sheet being unwound after such transfer from its shaft 21' or 21" by the associated capstan 25 or 25" as described above. With the pile 7 or 7" fully inside the press, belt 11 is halted to allow this pile to be compressed into a relatively firm cake 7a which is thereafter transported by one or more further conveyors 9 to an elevatable stacking rack 4 (of the type disclosed in the aforementioned Siempelkamp Pat. 3,077,271) for delivery to the several levels of a final press 5. A stacked output conveyor has been shown at 12.
A vertically movable cutting frame 13 may be lowered onto conveyor 9 to trim the edges of cake 7a, with temporary halting of that conveyor or with the frame 13 moving at the same forward speed as the conveyor.
Because of the relative length of the transport path from dispenser 1 to prepress 3, the vertical displacement of frame 22 to align the two sheets 2', 2" with the belt 11 involves only a slight tilting of these sheets without any resulting shifting of the pile 7 or 7" thereon.
It will be apparent that, by the arrangement described, either of the sheets 2', 2" can be charged by the dispenser 1 while the other sheet delivers the charge to the prepress 3. If desired, the number of superposed transfer sheets, operating at staggered intervals, may also be increased.
I claim:
1. A plant for the production of pressed-board plates, comprising hopper means for dispensing a particulate starting material to be compressed into such plates, a final press provided with heating means, a prepress disposed between said hopper means and said final press, and transport means for delivering a pile of said starting material to said prepress for precompression therein to form a cake and delivering said cake to said final press for compression and solidification to form a plate, said transport means including flexible support means reciprocable between said hopper means and said prepress and positionable for receiving therefrom a pile of said material to be delivered to said prepress, the latter being provided with a bed and with an endless conveyor encircling said bed, said conveyor being substantially synchronized with said transport means for receiving said pile from said sheet.
2. A plant as defined in claim 1, further comprising trimmer means for said cake ahead of said final press.
3. A plant as defined in claim 1 wherein said support means includes a pair of flexible sheets alternately reciprocable between said hopper means and said prepress.
4. A plant as defined in claim 3 wherein said support sheets are provided with vertically separated guide paths,
5. A plant as defined in claim 1 wherein said support means comprises a sheet of polytetrafluoroethylene.
References Cited UNITED STATES PATENTS 2,321,252 6/1943 Sayre 1816 2,618,813 11/1952 Patton et a1. 18-4 X 3,125,947 3/1964 Hubin 18-16 X 3,353,236 11/1967 Stedman 18-4 X 3,368,242 2/1968 Loewenfcld et a1. 18-16 X WILBUR L. McBAY, Primary Examiner US. Cl. X.R. 185, 16; 264-120
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES0105557 | 1966-08-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3521323A true US3521323A (en) | 1970-07-21 |
Family
ID=7526673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US663576A Expired - Lifetime US3521323A (en) | 1966-08-27 | 1967-08-28 | Plant for producing fiberboard plates and the like |
Country Status (2)
Country | Link |
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US (1) | US3521323A (en) |
ES (1) | ES344170A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3796529A (en) * | 1971-10-25 | 1974-03-12 | B Greten | Device for the manufacture of fiberboards from binder-interspersed, chip-like and/or fibrous particles |
US4242293A (en) * | 1979-10-02 | 1980-12-30 | Westvaco Corporation | Paper plate forming method and apparatus |
US4741916A (en) * | 1987-08-28 | 1988-05-03 | The Procter & Gamble Company | Method of and apparatus for producing individual dough pieces of substantially constant size and shape |
US5249946A (en) * | 1991-03-08 | 1993-10-05 | James River Corporation Of Virginia | Plate forming die set |
US20060151902A1 (en) * | 2002-03-31 | 2006-07-13 | Perry Just | Method and apparatus for producing plant container liners particularly from sphagnum moss |
US8414464B2 (en) | 2004-02-20 | 2013-04-09 | Dixie Consumer Products Llc | Apparatus for making paperboard pressware with controlled blank feed |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2321252A (en) * | 1938-11-12 | 1943-06-08 | Boonton Molding Company | Mechanism for loading and emptying molding presses |
US2618813A (en) * | 1950-09-14 | 1952-11-25 | Curtis Companies Inc | Method for making cellulosic board |
US3125947A (en) * | 1964-03-24 | hubin | ||
US3353236A (en) * | 1963-08-20 | 1967-11-21 | U S Perlite Corp | Apparatus for producing acoustical tile |
US3368242A (en) * | 1965-08-10 | 1968-02-13 | Siempelkamp Gmbh & Co | Multiplaten press system with individual charging sheets |
-
1967
- 1967-08-16 ES ES344170A patent/ES344170A1/en not_active Expired
- 1967-08-28 US US663576A patent/US3521323A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3125947A (en) * | 1964-03-24 | hubin | ||
US2321252A (en) * | 1938-11-12 | 1943-06-08 | Boonton Molding Company | Mechanism for loading and emptying molding presses |
US2618813A (en) * | 1950-09-14 | 1952-11-25 | Curtis Companies Inc | Method for making cellulosic board |
US3353236A (en) * | 1963-08-20 | 1967-11-21 | U S Perlite Corp | Apparatus for producing acoustical tile |
US3368242A (en) * | 1965-08-10 | 1968-02-13 | Siempelkamp Gmbh & Co | Multiplaten press system with individual charging sheets |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3796529A (en) * | 1971-10-25 | 1974-03-12 | B Greten | Device for the manufacture of fiberboards from binder-interspersed, chip-like and/or fibrous particles |
US4242293A (en) * | 1979-10-02 | 1980-12-30 | Westvaco Corporation | Paper plate forming method and apparatus |
US4741916A (en) * | 1987-08-28 | 1988-05-03 | The Procter & Gamble Company | Method of and apparatus for producing individual dough pieces of substantially constant size and shape |
US5249946A (en) * | 1991-03-08 | 1993-10-05 | James River Corporation Of Virginia | Plate forming die set |
US6284101B1 (en) | 1991-03-08 | 2001-09-04 | Fort James Corporation | Plate forming die set |
US20060151902A1 (en) * | 2002-03-31 | 2006-07-13 | Perry Just | Method and apparatus for producing plant container liners particularly from sphagnum moss |
US8414464B2 (en) | 2004-02-20 | 2013-04-09 | Dixie Consumer Products Llc | Apparatus for making paperboard pressware with controlled blank feed |
Also Published As
Publication number | Publication date |
---|---|
ES344170A1 (en) | 1968-09-16 |
DE1653287B2 (en) | 1973-02-08 |
DE1653287A1 (en) | 1970-11-05 |
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