EP0334834A2 - Method for radially cutting round wood - Google Patents

Method for radially cutting round wood Download PDF

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Publication number
EP0334834A2
EP0334834A2 EP89890059A EP89890059A EP0334834A2 EP 0334834 A2 EP0334834 A2 EP 0334834A2 EP 89890059 A EP89890059 A EP 89890059A EP 89890059 A EP89890059 A EP 89890059A EP 0334834 A2 EP0334834 A2 EP 0334834A2
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European Patent Office
Prior art keywords
wood
circular saw
finished
new
mouldings
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EP89890059A
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German (de)
French (fr)
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EP0334834B1 (en
EP0334834A3 (en
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Ludwig Lösch
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B7/00Sawing machines working with circular saw blades, specially designed for length sawing of trunks
    • B27B7/04Sawing machines working with circular saw blades, specially designed for length sawing of trunks by making use of a plurality of circular saws mounted on a single spindle; Arrangements for adjusting the mutual distances
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B1/00Methods for subdividing trunks or logs essentially involving sawing
    • B27B1/005Methods for subdividing trunks or logs essentially involving sawing including the step of dividing the log into sector-shaped segments

Definitions

  • parallel cut boards or squared timber are obtained as cut raw material.
  • the refined is processed by shaping cut or planing. specially manufactured wood end product.
  • This radial cutting process fulfills the contemporary task listed under II. In the following way.
  • the debarked, cylindrical round wood rolls (1) are pushed longitudinally axially through a feed pipe by continuous pressure and constant feed speed of the circular saw and leave after the cutting process as radially separated, core-free and. finished external wall molded parts in a discharge pipe the machining circular saw.
  • Two or three or four substantially different, finished outer wall molded parts are created in one operation and in a circular saw machine at the same time.
  • the variety of molded parts is an advantage for the market, because they are a novelty on the market.
  • the objective single work step is the substantial reduction in production costs.
  • the extended motor shafts (2,3) of the two drive motors (4,5) are at an angle of 3o degrees, more or less,
  • the drive motors (4,5) are arranged in the direction of the log axis along such a distance that the cannot touch circular saw blades (6,7) with their tooth tips up to the center of the wood.
  • the tangential cutting saw blade (8) also rotates on the circular saw shaft (2) and the saw blades (9, 1o) rotate on the circular saw shaft (3) and cut flat areas on the round timber (1).
  • the radial cutting saw blade (11) and the tangential cutting saw blades (8, 13, 14) rotate on the motor shaft (2).
  • the saw blade (13) creates a radially standing conical round cut.
  • the changing round wood diameter of cheaper small wood from 8 cm to 16 cm in diameter can be processed by simply changing the circular saw blades, without any noteworthy wood waste, into the required thicknesses of the outer wall profiles (B, C, E, F,) and thus optimally used.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacture Of Wood Veneers (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Abstract

This method produces for wooden constructions new outer-wall mouldings which are manufactured in a simplified, wood-saving manner and which afford substantially improved durability, and weathering protection, and prevent the wood from cracking. Using the hitherto known methods for cutting round wood to form boards and beams, with the subsequent second operation employing separate wood-shaping machines, labour-consuming outer-wall mouldings whose outer faces do not adequately withstand the weathering influences are produced. Using the method for radially cutting round wood which is the subject of the application, the round wood is predominantly radially divided in one operation on a circular-saw machine, and at least two finished, substantially different, new outer-wall mouldings are simultaneously produced thereby, said mouldings affording, due to their hard annual rings cut over their entire surface while upright, at least twice the durability with regard to weathering than hitherto. In addition, the radial-cutting method produces in the new outer-wall mouldings no drying shrinkage and sun cracks and no knotholes, which again contributes to the substantially increased durability. Using only circular-saw cuts, it is possible to produce, in one operation in a circular-saw machine, three substantially different finished outer-wall mouldings. The figures (D, E, F, C) are characteristic of the new radial-cutting method which is the subject of the invention. <IMAGE>

Description

I. Stand der Technik und deren MangelerscheinungenI. State of the art and its deficiency symptoms

Die Erzeugung der Schnittholzmassenware aus Rundholz erfolgt bis­her durch sogenannte Sägegatter mit vertikal oder horizontal hin und hergebenden Sägeblätter oder mit dem Rundumlaufenden Bandsägeblatt.The sawn timber bulk goods from logs have so far been produced by so-called saw frames with vertically or horizontally reciprocating saw blades or with the all-round band saw blade.

Dabei fallen in einem Arbeitsgang als Schnittrohware paralell­beschnittene Bretter oder Kantholz an. Aus dieser Schnittrohware der 1. Arbeitsstufe wird in der 2. oder 3. Arbeitsstufe durch Formungsschnitt-Fräs oder Hobelbearbei­tung das veredelte. speziell Holzendprodukt hergestellt.In one step, parallel cut boards or squared timber are obtained as cut raw material. From this raw raw material of the 1st stage of work, in the 2nd or 3rd stage of work, the refined is processed by shaping cut or planing. specially manufactured wood end product.

Es sind daher bisher mindest zwei örtlich u. zeitlich getrennte Bearbeitungsstufen auf mindest zwei verschiedenen Bearbeitungs­maschinen nötig, um das endgefertigte Holzprodukt für spezielle Zwecke erzeugen zu können.So far there are at least two local u. Separate processing stages on at least two different processing machines are necessary in order to be able to produce the finished wood product for special purposes.

Dazu kommt der Nachteil, daß durch die Paralleltrennung des Rundholzes (mit Ausnahme der anteilmäßig geringen Kerntrenn­stücke) an den Brettschnittflächen zwischen den harten Holz­jahresringen das Weichholz breitflächig zu Tage tritt und da­durch bei Benützungschlägen sich längsfaserig abnützt und abhebt. Dadurch entsteht auch die qualitativ besonders ver­minderte Seitenware.There is also the disadvantage that the parallel separation of the round wood (with the exception of the proportionally small core separating pieces) on the board cut surfaces between the hard wood annual rings shows the softwood over a wide area and thereby wears and stands out longitudinally when used. This also results in the qualitatively particularly reduced side goods.

Beim Trocknungsvorgang wölben und deformieren sich die Bretter und Pfosten entgegen der Holzkernseite und verlieren dadurch beträchtlich an Handelswert und vermindern die Holzausbeute für die nächste Bearbeitungsstufe. Die nicht festverwachsenen Äste fallen durch und bei dicken Brettern entstehen oberflächig Schwundriße die den Pilzbefall fördern.During the drying process, the boards and posts buckle and deform against the wooden core side and thereby lose considerable commercial value and reduce the wood yield for the next processing step. The branches that have not grown together fall through and on thick boards there are surface fissures that promote fungal attack.

II. Zeitgemäße Aufgabenstellung im besonderen für die Holzverwer­tung an Außenwänden mit Regenanfall u.direkten Sonnenanfall II. Contemporary task, in particular for recycling wood on external walls with rain and direct sunlight

  • a) Um dem vorzeitigen Holzverfall durch eindringende Nässe und direkter Sonnenbstrahlung entgenen wirken zu können, muß die Holzrißbildung und Astlochbildung verhindert werden und müs­sen die harten Holzjahresringe dem Wetteranfall eng und ganzflächig entgegen gestellt werden. Der Anteil der Weich­holzoberfläche wird dadurch auf das Mindeste reduziert.a) In order to counteract the premature decay of wood by penetrating moisture and direct sun radiation, the formation of wood cracks and knotholes must be prevented and the hard wood annual rings must be opposed to the weather attack closely and over the whole area. The proportion of the softwood surface is reduced to a minimum.
  • b) Die regen und winddichte Ausbildung der Einzelteiltrennfu­gen ist wesentlich.b) The rain and windproof design of the parting joints is essential.
  • c) Entscheidend ist, daß aus dem zylindrischen, entrindeten Rund­holz in einm Arbeitsgang und in einer Bearbeitungsmaschine im kontinuierlichen Bearbeitungsdurchlauf, mit höchster Holz­aubeute, ohne nenneswerten Holzabfall, mindest zwei profi­lierte Außenwandformteile für verschiedene Anforderungen ent­stehen, die sich beim nachfolgenden natürlichen oder künst­lichen Trocknen nicht verformen und zusätzlich noch die Holz­erhaltungsvorteile nach a) und b) erfüllen.c) It is crucial that from the cylindrical, debarked logs in one operation and in a processing machine in a continuous processing run, with the highest timber yield, without any noteworthy wood waste, at least two profiled outer wall molded parts for different requirements arise, which do not deform during the subsequent natural or artificial drying and also meet the wood conservation benefits of a) and b).

Ein solches Holzschnittverfahren ist der sprunghafte technische Fortschritt mit erwiesener Erfindungshöhe.Such a woodcut process is the leap in technical progress with proven inventiveness.

III. Wirkungsweise des hier angemeldeten Rundholz-­Radialschnittverfahren III. Mode of operation of the circular log radial cutting process registered here

Dieses Radialschnittverfahren erfüllt die unter II. angeführte zeitgemäße Aufgabenstellung in folgender Weise.This radial cutting process fulfills the contemporary task listed under II. In the following way.

Die entrindeten, zylindrischen Rundholzrollen (1) in ange­nommen 2 m Länge, werden längsachsial durch ein Zuführungs­rohr durch kontinuierlichem Druck und gleichbleibender Zu­führungsgeschwindigkeit der Bearbeitungskreissäge zugescho­ben und verlassen nach dem Schnittvorgang als radialge­trennte, kernfreie u. endgefertigte Außenwandformteile in einem Abführungsrohr die Bearbeitungskreissäge.The debarked, cylindrical round wood rolls (1), assumed to be 2 m long, are pushed longitudinally axially through a feed pipe by continuous pressure and constant feed speed of the circular saw and leave after the cutting process as radially separated, core-free and. finished external wall molded parts in a discharge pipe the machining circular saw.

Dabei entstehen zwei bzw. drei bezw, vier wesentlich ver­schiedene, endfertige Außenwandformteile in einem Arbeitsgang und in einer Kreissägemaschine gleichzeitig. Die Vielfalt der Formteile ist für das Marktangebot von Vorteil, denn sie sind auf dem Markt eine Neuheit.Two or three or four substantially different, finished outer wall molded parts are created in one operation and in a circular saw machine at the same time. The variety of molded parts is an advantage for the market, because they are a novelty on the market.

Gegenüber den bisherigen mehrfachen Arbeitsgängen ist der gegenständliche Einzelarbeitsgang die wesentliche Senkung der Erzeugungskosten.Compared to the previous multiple work steps, the objective single work step is the substantial reduction in production costs.

Entscheidend neu ist auch, daß die Schnittflächen aller 4 neuen Außenwandformteile ganzflächig die stehendangeschnittenen , engen,harten Holzjahresringe aufweisen.It is also crucial that the cut surfaces of all 4 new exterior wall molded parts have the standing cut, tight, hard wooden annual rings all over.

Damit erbringen sie gegenüber den bisherigen Außenwandscha­lungen mindest die doppelte Bestandsdauer.In this way, they achieve at least twice the duration of the existing wall formwork.

Dazu trägt das Freisein von Trocknungs u. Sonnenrißen durch die radiale Holzfasertrennung bei.The absence of drying u. Sun cracked by the radial wood fiber separation.

Schnittvorgang nach Abbildung (A)Cutting process according to figure (A)

Die verlängerten Motorwellen (2,3) der beiden Antriebmo­tore ( 4,5) stehen zueinand in einem Winkel von 3o Grad, mehr oder weniger, Die Antriebmotore (4,5) sind in Richtung zur Rundholzlängs­achse mit einem solchen Abstand angeordnet, daß sich die bis zum Holzmittelpunkt radialschneidenden Kreissägeblätter ( 6,7 ) mit ihren Zahnspitzen nicht berühren können.The extended motor shafts (2,3) of the two drive motors (4,5) are at an angle of 3o degrees, more or less, The drive motors (4,5) are arranged in the direction of the log axis along such a distance that the cannot touch circular saw blades (6,7) with their tooth tips up to the center of the wood.

Auf der Kreissägewelle (2) rotiert auch das tangentialschnei­dende Sägeblatt (8) und auf der Kreissägewelle (3) rotieren die Sägeblätter (9, 1o)welche auf dem Rundholz (1) Flach­stellen schneiden.The tangential cutting saw blade (8) also rotates on the circular saw shaft (2) and the saw blades (9, 1o) rotate on the circular saw shaft (3) and cut flat areas on the round timber (1).

Durch die Radialschnitte nach Abbildung (A) entstehen gleich­zeitig zwei Fertigprodukte und zwar die in Abbildung (B) darge­stellte kernfreie, selbsttragende Vollblockform und die in Ab­bildung (C) dargestellte ,kernfreie Halbblockform zur Steher­bauweise.The radial cuts according to Figure (A) result in two finished products at the same time, namely the core-free, self-supporting full block shape shown in Figure (B) and the core-free half block shape shown in Figure (C) for upright construction.

Schnittvorgang nach Abbildung (D)Cutting process according to figure (D)

Auf der Motorwelle (2) rotieren das radialschneidende Söge­blatt (11) und die tangentialschneidenden Sägeblätter (8,13,14) Das Sägeblatt (13) erzeugt einen radialstehenden konischen Rundholzeinschnitt.The radial cutting saw blade (11) and the tangential cutting saw blades (8, 13, 14) rotate on the motor shaft (2). The saw blade (13) creates a radially standing conical round cut.

Auf der Motorwelle (3) rotieren das radialschneidende Sägeblatt (12) und die tangentialsohneidenden Sägeblätter (9, 1o, 15)The radial cutting saw blade (12) and the tangential cutting blades (9, 1o, 15) rotate on the motor shaft (3)

Durch die Kreissägeradialschnitte nach der Abbildung (D) ent­stehen gleichzeitig drei Fertigprodukte und zwar die in Ab­bildung (E) dargestellte, kernfreie Keilschindelform mit Dichtungsübergriff und die in Abbildung (F) dargestellte kernfreie Keilschindelform (F) mit Nut und zusätzlich die in Abbildung (C) dargestellte ,kernfreie Halbblockform (C)The circular saw radial cuts according to figure (D) result in three finished products at the same time, namely the core-free wedge shingle shape shown in figure (E) with sealing overlap and the core-free wedge shingle shape (F) shown in figure (F) with groove and additionally the one in figure (C) Core-free half block shape shown (C)

Allen vier Außenwand-Schalungsprofilen ( B, C, E, F, ) die mit der hier dargestellten Radialschnittmaschine nur durch das Auswechseln der Kreissägeblätter herzustellen sind, ist gemeinsam, daß sie alle zum Rundholzkern radial angeschnit­ten sind und dadurch an der der Witterungsseseite ausge­setzten Holzfläche keine Schwund keine Sonnenrisse und keine Astdurchfallöcher und keine Trocknungsverformungen aufweisen.All four outer wall formwork profiles (B, C, E, F,) that can only be produced with the radial cutting machine shown here by replacing the circular saw blades, have in common that they are all cut radially to the log core and therefore none on the exposed wooden surface on the weather side No shrinkage from the sun and no branches through the branches and no drying deformations.

Die Praxis hat erwiesen, daß dadurch die Haltbarkeit der damitverfertigten Holzaußenwände gegenüber den bisher üb­lichen Ausführungen ohne Radialschnitte fast verdoppelt wurde und auch das optische Ansichtsbild durch das weitge­hende Verhindern der Holzoberflächenverwitterung , jahrelang verbessert wurde.Practice has shown that the durability of the wooden outer walls made with it has almost been doubled compared to the previously common designs without radial cuts and that the visual appearance has been improved for years by largely preventing the weathering of the wooden surface.

Die wechselnden Rundholzdurchmesser aus billigeren Schwach­holz von 8 cm bis 16 cm Durchmesser kann man durch das einfache Auswechseln der Kreissägeblätter, ohne nennenswerten Holzabfall,in die jeweils benötigten Stärken der Außenwand­profile ( B, C, E, F, ) verarbeiten und damit optimal nutzen.The changing round wood diameter of cheaper small wood from 8 cm to 16 cm in diameter can be processed by simply changing the circular saw blades, without any noteworthy wood waste, into the required thicknesses of the outer wall profiles (B, C, E, F,) and thus optimally used.

Claims (1)

1. Rundholzschnittverfahren zur Herstellung von Außenwand­formteilen zum Schutze gegen Schlagregen , Wind und Sonneneinstrahlung dadurch gekennzeichnet, daß das Rundholz (1) mit kontinuierlichem Vorschub längsachsial durch eine Kreissägenmaschine geführt wird und durch zwei radialschneidende Kreissägeblätter (6,7) und den drei tangentialschneidenden Kreissägeblättern (8,9,1o), die von zwei Antriebsmotoren (4,5 ) angetrieben werden,deren Wellen (2,3 ) um 3o Grad, oder mehr oder weniger, versetzt sind, in einem Arbeitsgang in die endfertige, kerngetrennte Vollblock­form ( B ) und gleichzeitig auch in die endfertige, kernge­trennte neue Halbblockform ( C ) zerschnitten wird, während alternativ zusätzlich zu den Kreissägeblättern (8,9,1o,) durch die radialschneidenden Kreissägeblätter (11, 12,) und die tangentialschneidenden Kreissägeblätter (13,14,15,) das Rundholz (1) gleichzeitig in die endfertige, kerngetrenn­te neue Keilschindelform ( E ) und die endfertige, kernge­trennte, neue Keilschindelform mit Nut ( F ) zerschnitten wird,wobei die neuen Außenwandformteile ( C, E, F,) ganzflächig, stehendangeschnittene , harte Holzjahresringe aufweisen, die den erhöhten Widerstand gegen Holzverwitterung und Holzrißbildung erbringen.1. Roundwood cutting process for the production of molded outer wall parts for protection against driving rain, wind and solar radiation, characterized in that the roundwood (1) is fed longitudinally axially through a circular saw machine and through two radial cutting circular saw blades (6,7) and the three tangential cutting circular saw blades (8 , 9,1o), which are driven by two drive motors (4,5), the shafts (2,3) of which are offset by 3o degrees, or more or less, in one operation into the finished, core-separated full block shape (B) and at the same time it is also cut into the finished, core-separated new half-block shape (C), while alternatively to the circular saw blades (8,9,1o,) by the radial cutting circular saw blades (11, 12,) and the tangential cutting circular saw blades (13,14,15, ) the log (1) simultaneously into the finished, core-separated new wedge shingle shape (E) and the finished, core-separated, new wedge chindelform with groove (F) is cut, whereby the new outer wall molded parts (C, E, F,) have hard wood annual rings that have been cut on the whole surface and provide increased resistance to weathering and cracking.
EP89890059A 1988-03-11 1989-02-28 Method for radially cutting round wood Expired - Lifetime EP0334834B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT65688 1988-03-11
AT656/88 1988-03-11

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EP0334834A2 true EP0334834A2 (en) 1989-09-27
EP0334834A3 EP0334834A3 (en) 1990-01-17
EP0334834B1 EP0334834B1 (en) 1991-07-03

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EP89890059A Expired - Lifetime EP0334834B1 (en) 1988-03-11 1989-02-28 Method for radially cutting round wood

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AT (1) ATE64885T1 (en)
DE (1) DE58900156D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997018930A1 (en) * 1995-11-22 1997-05-29 The Australian Radial Timber Conversion Company (Radcon) Pty. Ltd. Radial sawing log holder and method
EP1046480A2 (en) * 1999-04-23 2000-10-25 Edeltraud Schwaiger Device for cutting up logs using a quarter-cut and associated sawing station
EP1050386A1 (en) * 1999-05-05 2000-11-08 Esterer WD GmbH &amp; Co. Method and device for processing round timber to boards

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1463791A (en) * 1922-09-14 1923-08-07 Dyck Stumpers Van Angle-lath-cutting machine
US1942348A (en) * 1931-10-13 1934-01-02 Bruce R Ward Log for cabins and the like
US2051256A (en) * 1933-10-10 1936-08-18 Henry C Hilke Log trisecting structure
US3125138A (en) * 1964-03-17 Gang saw for improved tongue and groove
US3552457A (en) * 1968-05-29 1971-01-05 Mac Millan Bloedel Ltd Log break-down method and apparatus
US4111247A (en) * 1977-01-13 1978-09-05 Weyerhaeuser Company Log cutting and rejoining process for lumber manufacture
US4380336A (en) * 1981-09-28 1983-04-19 Pratt Charles D Bird house and method of making same
WO1985005063A1 (en) * 1984-04-28 1985-11-21 Gebrüder Linck Maschinenfabrik Und Eisengiesserei Device for shaving the sides of tree trunks

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125138A (en) * 1964-03-17 Gang saw for improved tongue and groove
US1463791A (en) * 1922-09-14 1923-08-07 Dyck Stumpers Van Angle-lath-cutting machine
US1942348A (en) * 1931-10-13 1934-01-02 Bruce R Ward Log for cabins and the like
US2051256A (en) * 1933-10-10 1936-08-18 Henry C Hilke Log trisecting structure
US3552457A (en) * 1968-05-29 1971-01-05 Mac Millan Bloedel Ltd Log break-down method and apparatus
US4111247A (en) * 1977-01-13 1978-09-05 Weyerhaeuser Company Log cutting and rejoining process for lumber manufacture
US4380336A (en) * 1981-09-28 1983-04-19 Pratt Charles D Bird house and method of making same
WO1985005063A1 (en) * 1984-04-28 1985-11-21 Gebrüder Linck Maschinenfabrik Und Eisengiesserei Device for shaving the sides of tree trunks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997018930A1 (en) * 1995-11-22 1997-05-29 The Australian Radial Timber Conversion Company (Radcon) Pty. Ltd. Radial sawing log holder and method
EP1046480A2 (en) * 1999-04-23 2000-10-25 Edeltraud Schwaiger Device for cutting up logs using a quarter-cut and associated sawing station
EP1046480A3 (en) * 1999-04-23 2001-10-10 Edeltraud Schwaiger Device for cutting up logs using a quarter-cut and associated sawing station
EP1050386A1 (en) * 1999-05-05 2000-11-08 Esterer WD GmbH &amp; Co. Method and device for processing round timber to boards

Also Published As

Publication number Publication date
DE58900156D1 (en) 1991-08-08
EP0334834B1 (en) 1991-07-03
EP0334834A3 (en) 1990-01-17
ATE64885T1 (en) 1991-07-15

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