EP0873830A2 - Vorrichtung zum Pressen von spannförmigen Materialien - Google Patents

Vorrichtung zum Pressen von spannförmigen Materialien Download PDF

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Publication number
EP0873830A2
EP0873830A2 EP97850085A EP97850085A EP0873830A2 EP 0873830 A2 EP0873830 A2 EP 0873830A2 EP 97850085 A EP97850085 A EP 97850085A EP 97850085 A EP97850085 A EP 97850085A EP 0873830 A2 EP0873830 A2 EP 0873830A2
Authority
EP
European Patent Office
Prior art keywords
curing chamber
arrangement
channel system
moulding
tools
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.)
Ceased
Application number
EP97850085A
Other languages
English (en)
French (fr)
Other versions
EP0873830A3 (de
Inventor
Gunnar Gerhardson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polima AB
Original Assignee
Polima AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Polima AB filed Critical Polima AB
Publication of EP0873830A2 publication Critical patent/EP0873830A2/de
Publication of EP0873830A3 publication Critical patent/EP0873830A3/de
Ceased legal-status Critical Current

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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

Definitions

  • the invention relates to an arrangement for manufacturing products, for example centre plugs for bobbins, pallet blocks, etc., of wood fibre material in the form of chips or shavings supplemented by hardening binder, particularly of the heat-curable type.
  • Press machines for rational and efficient production of products based on wood fibre material in the form of chips and/or shavings are known.
  • One example of such a machine is described in published Swedish application 466 092.
  • the arrangement shown and described therein implies a continuous flow of a number of moulds into a heating chamber.
  • each mould is supported individually in a cassette.
  • the cassettes are externally dimensioned based on a fixed channel system which has a certain length and which has predetermined lateral dimensions.
  • the internal height of the cassettes is completely fixed by the height of the mould, since each cassette's top and bottom has the specific purpose of keeping the mould shut during hardening.
  • the construction of the cassette in the known machine moreover means that the pressing of the chip material and the ejection of the ready product cannot be carried out in the channel system itself.
  • the known machine is therefore provided with a separate pressing and ejection unit connected to the heating chamber.
  • the known arrangement has its field of use in such applications where products can be manufactured in very large series without the need for dimensional changes.
  • the object of the invention is to provide a press machine which considerably increases the degree of freedom available for dimensional changes in the products intended for pressing, in particular concerning the height dimension, without major operations having to be performed on the machine.
  • the invention also has the object of providing a press machine where the curing chamber is integrated with the pressing unit.
  • the invention thus provides an arrangement for manufacturing products, for example centre plugs for bobbins, pallet blocks etc., from hardenable wood fibre material such as chip/shaving material supplemented with binder.
  • the arrangement comprises a plurality of moulding tools, a device for supplying said material to the tools, a device for compressing the supplied material, a curing chamber defining a channel system for the moulding tools, an arrangement for transporting the moulding tools in the channel system and an arrangement for ejecting ready products from the tools.
  • the arrangement is characterized in that the curing chamber comprises a pair of opposed wide sidewalls which with their inner sides form an upper part and a lower part respectively of the moulding tool, and in that an adjustment device is arranged to adjust the distance between said inner sides of the wide sidewalls.
  • the wide sidewalls form the top and bottom respectively of the curing chamber, and the top is formed with an openable part which defines a supply position and compression position in the channel system.
  • the arrangement for supplying the chip material is thereby placed above said openable part, and the arrangement for compressing the material is placed below the openable part.
  • the openable part In the open condition, the openable part provides a filling opening for the material and in a closed condition said part forms a counter-pressure plate for the compression device.
  • the openable part is preferably so arranged that, in the channel system, it also frees the most recently previous moulding tool, whereby an ejector for ready products is arranged in the position for said most recently previous tool.
  • the compression device is connected to the bottom of the curing chamber by means of a material chamber which is open towards the curing chamber, whereby a press cylinder is operatively connected with said material chamber.
  • the channel system for the moulding tools comprises at least two parallel channels, whereby the narrow sidewalls of the curing chamber at least partially form guides in said channels, and at least one additional inner guide arrangement is arranged inside the chamber and ends at a distance from the two opposed narrow sidewalls such that a moulding tool can also be transported perpendicular to the direction of said two parallel channels.
  • the curing chamber comprises a substantially parallelapipedical housing, whereby a cylinder for transporting the moulding tools in the channel system is arranged at each end face of the housing, besides which the openable part comprises a corner part of the roof, which is movable in translating motion forwards and backwards by a cylinder.
  • the adjustment device comprises a mechanical and/or hydraulic arrangement for raising and lowering the top of the curing chamber.
  • Said heat-curing is suitably achieved by heat supply from a heating element supported by the top and/or bottom wall of the curing chamber.
  • Reference numeral 10 generally denotes a curing or heating chamber supported in a machine frame (not shown).
  • the curing chamber is parallelapipedical in shape and in each of the end areas of the chamber there are cylinders 11, 12, 13 and 14.
  • the curing chamber is separated along a horizontal plane and has a roof or top 15 and a bottom 16.
  • rim portions 17-19 (only certain ones shown) formed as guides, and internally in the curing chamber there is an additional guide arrangement comprising a pair of inner guides 20, 21 which are mutually parallel and parallel with the rim portions 17-19.
  • the inner guides 20, 21 end at a distance from the respective short sides of the curing chamber 10.
  • the guides form a channel system constituting a rectangular path for the moulding tools 22.
  • These moulding tools are hollow all the way through and thus have an open upper part and an open lower part and, in the depicted embodiment, are substantially parallelapipedical and dimensioned for being accommodated with a sliding fit in said channel system.
  • An arrangement for height adjustment (schematically shown by double arrow 23) of the curing chamber's roof 15 is arranged so that the roof, with its inside, can be positioned at a predetermined constant distance from the bottom plane of the curing chamber.
  • Said adjustment device can for example comprise a set of threaded rods/bars, each of which is provided with an adjustment nut and locked to the bottom as well as being fed through an aperture in the roof with the adjustment nuts resting against the underside of the roof.
  • the adjustment device can comprise suitable arrangements of jacks, mechanical or hydraulic.
  • the height adjustment device 23 is adjusted for operation so that the roof's inside wall upwardly closes the mould.
  • the inside bottom (base) of the curing chamber shuts the bottom of the moulding tools during their transport in the channel system.
  • the roof 15 of the curing chamber has a removable part 24 in a corner region of the roof.
  • the part 24 is formed as a translatory openable and closeable plate.
  • the translatory movement is achieved by a cylinder 32 and the plate's movement is controlled in suitable guides (not shown).
  • Said height adjustment device 23 is also arranged so that the plate follows the movement of the roof 15.
  • the plate 24 is dimensioned so that it frees a supply station in the channel system, said supply channel being for the chip-like material which is to be filled into the moulding tool, as well as freeing an ejection position for the ready product.
  • a filler 25 which for example has metering scales for the chip material, the filler having a filling tube 26 positioned vertically directly above a filling chamber 27.
  • the filling chamber 27 is directly connected to the curing chamber's bottom and frees an opening in this for supplying chip material into the filling chamber.
  • Piston 28 of a press cylinder 29 operates inside the filling chamber 27.
  • An ejector 30 with a vertically forwardly and backwardly moving ejector element 31 is arranged in said ejector station.
  • a hole (not shown) for feeding out ready products to a suitable transport tube.
  • the curing chamber's 10 heat supply is achieved by means of thermostatically controlled heating elements (not shown) arranged in the upper part of the roof and the lower part of the bottom.
  • the plate 24 is shown in a retracted position and thereby frees the supply station for chip material and the ejector station for the ready product.
  • the material falls down through the empty tool in the supply station and moves down into the filling chamber 27.
  • the ejector 30 releases the ready product from the moulding tool in the ejection position.
  • the cylinder 32 displaces the plate 24 back into the roof so that the interior of the plate will form a continuous planar inside the roof or top.
  • the cylinder 29 is activated and the piston 28 moves up and compresses the chip material against the plate 24 which functions as a counter-pressure plate.
  • the piston 28 returns and the cylinder 11 then starts to function after the piston 12 has opened a position in the channel system for the newly filled moulding tool and the tool with the newly compressed material is displaced one step in the channel system.
  • the cylinder 13 takes care of displacement in the lateral direction in the rectangular path of the chip material present in the moulding tool during curing, and the cylinder 14 takes care of forward feeding in the channel system to the filling and ejection position of the individual moulding tools.
  • the plate 24 will release (free) a moulding tool which has no chip material as soon as this tool is in a filling position and the plate will likewise release a tool in the ejection position as soon as this tool is in such a position.
  • the previously mentioned adjustment device 23 also operates on the counter-pressure plate 24 and adjusts this into the same height position as the rest of the roof.
  • Moulding tools with the same outer dimensions as shown in the figure, but with another height dimension, can easily be introduced into the channel system by corresponding height adjustment of the roof 15 by means of the adjustment device 23.
  • the movement and movement pattern of the counter-pressure plate can be different than that which has been described.
  • the plate can be drawn back in two steps so that it first frees the ejector position and then the filling position.
EP97850085A 1997-04-24 1997-06-05 Vorrichtung zum Pressen von spannförmigen Materialien Ceased EP0873830A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9701527A SE509099C2 (sv) 1997-04-24 1997-04-24 Anordning för pressning av spånmaterial
SE9701527 1997-04-24

Publications (2)

Publication Number Publication Date
EP0873830A2 true EP0873830A2 (de) 1998-10-28
EP0873830A3 EP0873830A3 (de) 1998-12-23

Family

ID=20406697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97850085A Ceased EP0873830A3 (de) 1997-04-24 1997-06-05 Vorrichtung zum Pressen von spannförmigen Materialien

Country Status (3)

Country Link
EP (1) EP0873830A3 (de)
PL (1) PL325819A1 (de)
SE (1) SE509099C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103878861A (zh) * 2012-12-24 2014-06-25 温州市正玖机器人研制有限公司 一种复合板型材的生产与成型设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959612A (en) * 1932-05-07 1934-05-22 Auto Mold Inc Apparatus for manufacturing articles from plastic composition materials
GB1347745A (en) * 1970-03-16 1974-02-27 Dexploitation Des Etabs E Boff Moulding press
US3933968A (en) * 1968-01-29 1976-01-20 Pierre Sorbier Method of moulding articles from a paste like material
SE466092B (sv) * 1988-12-21 1991-12-16 Swedoor Ab Anordning och foerfarande foer pressning av spaanmaterial

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959612A (en) * 1932-05-07 1934-05-22 Auto Mold Inc Apparatus for manufacturing articles from plastic composition materials
US3933968A (en) * 1968-01-29 1976-01-20 Pierre Sorbier Method of moulding articles from a paste like material
GB1347745A (en) * 1970-03-16 1974-02-27 Dexploitation Des Etabs E Boff Moulding press
SE466092B (sv) * 1988-12-21 1991-12-16 Swedoor Ab Anordning och foerfarande foer pressning av spaanmaterial

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103878861A (zh) * 2012-12-24 2014-06-25 温州市正玖机器人研制有限公司 一种复合板型材的生产与成型设备

Also Published As

Publication number Publication date
EP0873830A3 (de) 1998-12-23
SE9701527L (sv) 1998-10-25
SE509099C2 (sv) 1998-12-07
SE9701527D0 (sv) 1997-04-24
PL325819A1 (en) 1998-10-26

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