EP1842638A2 - Système pour améliorer l'utilisation de la capacité dans des chaînes de travail de bois - Google Patents

Système pour améliorer l'utilisation de la capacité dans des chaînes de travail de bois Download PDF

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Publication number
EP1842638A2
EP1842638A2 EP07105085A EP07105085A EP1842638A2 EP 1842638 A2 EP1842638 A2 EP 1842638A2 EP 07105085 A EP07105085 A EP 07105085A EP 07105085 A EP07105085 A EP 07105085A EP 1842638 A2 EP1842638 A2 EP 1842638A2
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EP
European Patent Office
Prior art keywords
wood
pieces
length
station
speed
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.)
Withdrawn
Application number
EP07105085A
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German (de)
English (en)
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EP1842638A3 (fr
Inventor
Håvard Omholt
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.)
Bergene Holm AS
Original Assignee
Bergene Holm AS
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 Bergene Holm AS filed Critical Bergene Holm AS
Publication of EP1842638A2 publication Critical patent/EP1842638A2/fr
Publication of EP1842638A3 publication Critical patent/EP1842638A3/fr
Withdrawn legal-status Critical Current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
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes

Definitions

  • the present invention relates to a system for improving the utilization of the capacity of a wood working line in accordance with the preamble of the subsequent claim 1,
  • the length of the single pieces, or rather, the total length of these will determine how many wood pieces that may be fed through the station per time unit.
  • the different working stations in a wood working factory are in general coupled together so that the transfer of wood pieces from one station to the next takes place practically automatically.
  • the total production capacity will depend on the fact that the individual station can keep up with the deliveries from the previous station or deliver quickly enough to the next station.
  • the production speed will never be higher than what the station with the lowest speed can deliver. If the preceding station has a larger production capacity than the subsequent station, the production speed of the preceding station must be reduced until the subsequent station can keep up with the wood pieces supplied.
  • a particular problem of disproportion between different stations exists in the case where the production speed for one station is depending on the length of the wood pieces, while the production speed of another station is not depending on the length.
  • a preceding station is a planing machine, which is set to plane the wood pieces in the longitudinal direction
  • the subsequent station is a cross-cutting and sorting table, on which the wood pieces are placed in a slot defined between carriers on the cross-cutting and sorting table conveyor.
  • the wood pieces are conveyed transverse to the longitudinal direction on this table and the capacity is thus independent of the length of the wood pieces.
  • the wood pieces are conveyed virtually end to end through the planning machine. Therefore, an accumulation of short wood pieces will result in a relatively frequent delivery of wood pieces from the machine. These pieces each have to have one slot in the cross-cutting and sorting table. As a consequence the planning machine cannot work any faster than the rate at which the cross-cutting and sorting table can receive the wood pieces in an individual slot.
  • the present invention has as an object to achieve a better utilization of the production capacity of stations where the capacity is depending on the number of wood pieces and which are subsequent to a station where the production capacity is depending on the length of the wood pieces. This achieved by on a regular basis adapting the speed of the preceding working station to the length of the wood pieces, so that the number of wood pieces which is delivered from the station per time unit is sought to be adapted to the speed of the subsequent wood working machine. Preferably, the number of wood pieces delivered from the station per time unit is kept relatively constant.
  • relatively constant number of wood pieces is meant a rate which lies within a narrower range than what is the case if the speed of the preceding working station is substantially constant measured in length of wood per time unit.
  • the adaptation of the speed of the preceding station relative to the length of the wood pieces takes preferably place based on measurements of the length of wood pieces before they enter the preceding working station.
  • the measurements of the length may be done in various ways, for example:
  • Figure 1 shows a production plant with all stations necessary for production of panels or floor boards from sawn planks to finished and packed materials. The majority of the stations shown are constructed according to well known technology and works in a conventional way. Therefore, these stations will be explained very briefly.
  • Sawn planks enter as a timber package 1.
  • the planks are separated in a plank separator 2 and are fed individually through a single piece feeder 3 to a jigsaw 4, which splits the plank longitudinally into two or three boards.
  • the split planks/boards are then transferred to an intermediate storage 5 and from there to a further single piece feeder 6. Further from this the boards are put with their ends flush with each other by an end leveller 7. Thereafter, the boards are collected on a collecting table 8. From this tey are fed singularly through a planing machine 9, After the planing machine 9 the boards are delivered to a small buffer 10. From this the boards are picked up and put on a cross-cutting and sorting table 11.
  • the cross-cutting and sorting table 11 has a slot for each board.
  • the slot is defined between two rows of carriers (not shown), which extend transverse to the cross-cutting and sorting table 11.
  • Such a cross-cutting and sorting table is described in Norwegian Patent No. 177046 .
  • the boards are cross-cut at both their ends and at the same time a quality control is performed.
  • the panel or floor boards Downstream of the cross-cutting and sorting table the panel or floor boards are bundled in a sorting and bundling machine 12, Thereafter the bundles are wrapped in a foiling machine 13, labelled and fed to packaging in a packaging machine 14 before the packages are conveyed out of the production plant for further transport,
  • planks and the boards will change their direction of travel from transverse travel to longitudinal travel and back to transverse travel many times. In the example shown, this takes place at three stations: at the jigsaw 4, at the planing machine 9 and at the foiling machine 13.
  • the most critical of these machines is the planing machine 9. This is because of the fact that after the jigsaw there is a reasonably large buffer represented by the intermediate storage 5 and the fact that after the foiling machine there are no other critical working machines.
  • the cross-cutting and sorting table is a critical station that easily becomes a bottle neck in the process.
  • FIG. 2 shows in greater detail the process equipment upstream of the planing machine.
  • the intermediate storage 5 in which a substantial amount of boards can be collected, usually partly on top of each other.
  • the single piece feeder 6 picks boards one by one from the intermediate storage 5.
  • an end leveller 7 the board is displaced longitudinally so that one of the ends (in the case shown, the end 17 facing left in the figure) lies against a stop 18. Thereby all the boards will lie with one of their ends flush with each other,
  • a transverse conveyor 19 the boards are then conveyed to the collecting table 8. Here the boards will lie side by side against each other.
  • a planing feeder 20 provides for feeding of the boards one by one longitudinally into the planing machine 9.
  • FIG. 3 and 4 is shown an example where a simple system with a measuring boom 22 arranged above the collecting table 8 is used.
  • the measuring boom 22 is equipped with a photo cell 23 which registers if the table 16 below the photo cell is above or below a certain length. Consequently, the boards are categorized into two classes of length only: short and long. When a long board 16a passes, this will be registered and the position of this will be supervised.
  • a control unit coupled to the measuring boom will give a signal to the speed regulator of the planing machine 9 and possibly also to the speed regulator of the planing feeder 20 and the through-put speed/tool speed of the planing machine will increase. Consequently, the time that the board 16a uses to travel through the planing machine 9 will be reduced compared to what would have happened if the planing machine 9 did not receive any message indicating that the board 16a was of the long type. Instead of logging the position of the board at any time, several photo cells may also be arranged along the boom 22 so that the length of all the boards 16 on the collecting table 8 is registered at any time.
  • the boards may also be classified into several lengths and the speed of the planing machine 9 adjusted in several steps. The finer the subdivision is, the more even the rate will be, at which the boards 16 will exit the planing machine 9.
  • An even exiting rate from the planing machine 9 makes the cross-cutting and sorting table capable to receive the planed boards at the same speed each slot has in the transverse direction, and more slots can therefore be filled.
  • the sorting station and the foiling machine downstream of the cross-cutting and sorting table In practice the lowest capacity in the plant will be the sorting station and the foiling machine downstream of the cross-cutting and sorting table.
  • the cross-cutting and sorting table consequently, although it may run at a higher speed, adapt to these subsequent stations.
  • An increase of 4% is very substantial in a large production facility as shown in figure 1 and will constitute more than 500 boards per day. By optimizing the invention further, the increase in production is expected to be larger.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Control Of Conveyors (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Multi-Process Working Machines And Systems (AREA)
EP07105085A 2006-03-31 2007-03-28 Système pour améliorer l'utilisation de la capacité dans des chaînes de travail de bois Withdrawn EP1842638A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20061464A NO324588B1 (no) 2006-03-31 2006-03-31 Anordning ved en produksjonslinje av to eller flere trebearbeidings- og behandlingsstasjoner.

Publications (2)

Publication Number Publication Date
EP1842638A2 true EP1842638A2 (fr) 2007-10-10
EP1842638A3 EP1842638A3 (fr) 2008-05-28

Family

ID=38199444

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07105085A Withdrawn EP1842638A3 (fr) 2006-03-31 2007-03-28 Système pour améliorer l'utilisation de la capacité dans des chaînes de travail de bois

Country Status (2)

Country Link
EP (1) EP1842638A3 (fr)
NO (1) NO324588B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102390071A (zh) * 2011-09-30 2012-03-28 佛山市顺德工业与信息技术研究中心有限公司 基于网络控制的木材加工柔性化生产系统
US20160031115A1 (en) * 2014-08-04 2016-02-04 Weinig Dimter Gmbh & Co. Kg Device and Method for Performing Cross Cuts on Workpieces of Wood
CN107067210A (zh) * 2017-04-12 2017-08-18 成都大唐弘伟木业有限公司 一种木质家具原材料分配的方法
CN107085387A (zh) * 2017-04-12 2017-08-22 成都大唐弘伟木业有限公司 一种将原木与生产线匹配的系统
CN115042286A (zh) * 2022-06-25 2022-09-13 北京建工集团有限责任公司 一种用于建筑模板预制加工的自动化作业线

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956617A (en) * 1975-01-27 1976-05-11 Schmidt Robert W System for indicating when maximum material speed for a predetermined board length is exceeded in a corrugator cut-off machine
US5251681A (en) * 1992-06-05 1993-10-12 Newman-Whitney Method and apparatus for optimizing planer mill output
WO2005113206A1 (fr) * 2003-04-29 2005-12-01 Coe Newnes/Mcgehee Ulc Systeme et procede optimises pour installation de rabotage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956617A (en) * 1975-01-27 1976-05-11 Schmidt Robert W System for indicating when maximum material speed for a predetermined board length is exceeded in a corrugator cut-off machine
US5251681A (en) * 1992-06-05 1993-10-12 Newman-Whitney Method and apparatus for optimizing planer mill output
WO2005113206A1 (fr) * 2003-04-29 2005-12-01 Coe Newnes/Mcgehee Ulc Systeme et procede optimises pour installation de rabotage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102390071A (zh) * 2011-09-30 2012-03-28 佛山市顺德工业与信息技术研究中心有限公司 基于网络控制的木材加工柔性化生产系统
US20160031115A1 (en) * 2014-08-04 2016-02-04 Weinig Dimter Gmbh & Co. Kg Device and Method for Performing Cross Cuts on Workpieces of Wood
US9902084B2 (en) * 2014-08-04 2018-02-27 Weinig Dimter Gmbh & Co. Kg Device and method for performing cross cuts on workpieces of wood
CN107067210A (zh) * 2017-04-12 2017-08-18 成都大唐弘伟木业有限公司 一种木质家具原材料分配的方法
CN107085387A (zh) * 2017-04-12 2017-08-22 成都大唐弘伟木业有限公司 一种将原木与生产线匹配的系统
CN115042286A (zh) * 2022-06-25 2022-09-13 北京建工集团有限责任公司 一种用于建筑模板预制加工的自动化作业线
CN115042286B (zh) * 2022-06-25 2023-02-28 北京建工集团有限责任公司 一种用于建筑模板预制加工的自动化作业线

Also Published As

Publication number Publication date
EP1842638A3 (fr) 2008-05-28
NO324588B1 (no) 2007-11-26
NO20061464L (no) 2007-10-01

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