DE2055179A1 - Process for improving the screw holding capacity of wood soaked in coal tar oil - Google Patents
Process for improving the screw holding capacity of wood soaked in coal tar oilInfo
- Publication number
- DE2055179A1 DE2055179A1 DE19702055179 DE2055179A DE2055179A1 DE 2055179 A1 DE2055179 A1 DE 2055179A1 DE 19702055179 DE19702055179 DE 19702055179 DE 2055179 A DE2055179 A DE 2055179A DE 2055179 A1 DE2055179 A1 DE 2055179A1
- Authority
- DE
- Germany
- Prior art keywords
- wood
- coal tar
- screw
- tar oil
- holding capacity
- 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.)
- Granted
Links
- 239000002023 wood Substances 0.000 title claims description 23
- 239000011280 coal tar Substances 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000007596 consolidation process Methods 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 description 6
- 239000000057 synthetic resin Substances 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 4
- 241001669679 Eleotris Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 125000005442 diisocyanate group Chemical group 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 238000007586 pull-out test Methods 0.000 description 1
- 239000011276 wood tar Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/06—Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure or fretting
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
- E01B9/04—Fastening on wooden or concrete sleepers or on masonry without clamp members
- E01B9/14—Plugs, sleeves, thread linings, or other inserts for holes in sleepers
- E01B9/16—Plugs, sleeves, thread linings, or other inserts for holes in sleepers for wooden sleepers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/14—Non-metallic plugs or sleeves; Use of liquid, loose solid or kneadable material therefor
- F16B13/141—Fixing plugs in holes by the use of settable material
- F16B13/142—Fixing plugs in holes by the use of settable material characterised by the composition of the setting material or mixture
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Description
Verfahren zur Verbesserung des Schraubenhaltevermögens von steinkohlenteerölgetränktem Holz Die Erfindung betrifft ein Verfahren zur Verbesserung des Schraubenhaltevermögens von steinkohlenteerölgetränktem Holz, insbesondere von Sisenbahnechwellen.Process for improving the screw holding capacity of coal tar oil impregnated Wood The invention relates to a method for improving screw retention wood soaked in coal tar oil, especially Sisenbahnechwellen.
Obwohl Holz ein befriedigendes Schraubenhaltevermögen quer zur Faserrichtung besitzt, ist besonders für hohe, vor allem dynamische Beanspruchungen, eine Verbesserung erforderlich. Bei.Although wood has a satisfactory screw holding capacity across the grain is an improvement especially for high, especially dynamic loads necessary. At.
Eisenbahnschwellen z.B. lockern sich die Schwellenschrauban, mit denen die Schienenauflagerplatten befestigt sind, im laufe der Zeit durch verschiedene Einflüsse so sehr, daß die Befestigmg ungenügend wird und daher erneuert werden muß.Railway sleepers, for example, loosen the sleeper screws with which the rail support plates are attached over time by different Influences so much that the fastening becomes insufficient and therefore are renewed got to.
Zur Verbesserung des Schraubenhaltevermögens von Holz und Holzwerkstoffen wurden von A. Burmester (1966, 1967) Versuche durchgeführt, bei denen in die vorgebohrten Schraubenlöcher Kunotharz gegossen wurde, das durch die Schrauben beim Eindrehen in die angrenzenden Holzzonen gedrückt wurde und dort aushärten konnte, wobei die Polymerisation durch Erhitzen oder katalytische Einwirkung möglich ist. Dieses Verfahren wurde von Bürkle und Herzig (1969) aufgegriffen; sie versuchten, das Schraubenhaltevermögen steinkohlenteerölgetränkter Holzschwellen durch Verwendung von Hainstotf- und Resorcinharz zu verbessern und erzielten damit Festigkeitszunahmen von 21 bzw. 24%. Diese Harze sind aber entweder nicht wasserfest oder nicht zu chemischen Heaktionen mit Steinkohlenteeröl imstande.To improve the screw retention capacity of wood and wood-based materials A. Burmester (1966, 1967) carried out tests in which the pre-drilled Screw holes Kunotharz was poured through the screws when screwing them in was pressed into the adjacent wood zones and could harden there, whereby the Polymerization by heating or catalytic action is possible. This method was taken up by Bürkle and Herzig (1969); they tried the screw holding power Wooden sleepers soaked in coal tar oil through the use of Hainstotf and resorcinol resin to improve and thus achieved strength increases of 21 and 24%. These resins but are either not waterproof or not too chemical reactions with coal tar oil able.
Der Erfindung liegt die Aufgabe zugrunde, eine witterungsbeständige Verfestigung der Holzzone um das Schraubenloch herum zu schaffen und eine besonders feste Verbindung der Komponenten Holz, Steinkohlenteeröl und Kunstharz untereinander zu erreichen, weil dadurch die beste Gewahr fiir eine erhöhung des Schraubenhaltevermögens gegeben ist.The invention is based on the object of a weather-resistant To create solidification of the wood zone around the screw hole and one special Fixed connection between the components wood, coal tar oil and synthetic resin to be achieved because this provides the best guarantee for an increase in the screw holding capacity given is.
Diese komplexe Verbindung aller an der Befestigung einer Schraube in steinkohlenteerölgetränktem Holz beteiligten Komponenten wird erfindungsgemäß dadurch erreicht, daß ein Kunstharz verwendet wird, das sowohl mit Holz als auch mit Steinkohlenteeröl chemisch reagiert. Dabei ist es als besonders vorteilhaft zu werten, daß die Reaktion ohne Zuführung von Energie oder ohne Verwendung eines Katalysators in Gang kommt, wenn ein Kunstharz aus der Gruppe der Diisocyanate verwendet wird.This complex connection of all to the fastening of a screw Components involved in wood soaked in coal tar oil will according to the invention achieved in that a synthetic resin is used with both Both wood and coal tar oil react chemically. It is as special It is advantageous to consider that the reaction takes place without the addition of energy or without use a catalyst comes into play when a synthetic resin from the group of diisocyanates is used.
Das Eindringen des Kunstharzes in die Randgebiete um das Schraubenlock wird in einfacher Weise dadurch erreicht, daß der Stoff in das Schraubenloch gefüllt und dann beim Eindrehen der Schraube in das Holz gepreßt wird. Das Ausmaß der Verfestigung hängt von der Menge des eingeführten Kunetharzes ab.The penetration of the synthetic resin into the peripheral areas around the screw lock is achieved in a simple manner that the substance is filled into the screw hole and is then pressed into the wood when the screw is screwed in. The degree of solidification depends on the amount of the imported kunet resin.
Die nit der Erfindung erzielten Vorteile bestehen darin, daß eine feuchtigkeitsbeständige, gehärtete Zone um die Schraube herum geschaffen wird, deren Festigkeit so hoch ist, daß eie die bisher bekanntgewordenen Vergütungen in ihrer wirkung erheblich übertrifft. Der dichte Verband zwischen Schraube und vergüteten Holz verhindert außerdem die Eisenkorrosion und damit die ungünstige Einwirkung von Eisensalzen auf das Holz. Schließlich bewirkt die Einlagerung des Kunstharz es nach seiner Härtung eine Verfestigung des Holzes im juflagerbereich der Schienen. Das Verfahren ist sehr einfach durchzuführen. Es erfordert keine zusätzlichen teuren Geräte, denn es ist lediglich notwendig, vor dem Eindrehen der Schrauben einen geeigneten reaktiven Stoff in die Schraubenlöcher einzufällen. Die Reaktion zwischen Kunstharz, Steinkohlenteeröl und Holz tzt bereits bei Normaltemperatur ein und ist in wenigen Stunden beendet, 80 daß die Schwello gleich im Gleis eingebaut werden kann.The advantages achieved by the invention are that a Moisture-resistant hardened zone is created around the screw, whose Strength is so high that eie the previously known remuneration in their effect considerably exceeds. The tight bond between screw and tempered Wood also prevents iron corrosion and thus the unfavorable effects of iron salts on the wood. Eventually it causes the inclusion of the synthetic resin After it has hardened, the wood in the support area of the rails solidifies. The procedure is very easy to carry out. It doesn't require any additional expensive ones Devices, because it is only necessary to have a suitable one before screwing in the screws to precipitate reactive material into the screw holes. The reaction between synthetic resin, Coal tar oil and wood already corrode at normal temperature and are in a few Hours finished, 80 that the sleeper can be installed in the track right away.
Im folgenden Beispiel wird die Durchführung des Verfahrens und di. damit erzielte Wirkung näher beschrieben. bin Stück B-chnholz wurde im üblichen Kesseldruckverfahren mit Steinkohlenteeröl getränkt, wodurch eine Schutzmittelsaufnahme von 145 @@@ Holz erreicht wurde. In diese Holz wurden Löcher mit einen Durchmesser gebohrt, der 80% dea Kerndurchmessers der schraube betiucl, Anschließend wurden die Löcher mit dem Handelsprodukt "Desmodur L", einem Diisocyanat, vollständig gefiillt, und dann wurden die Schrauben eingedreht. Nach Hätung des Stoffes wurde die Ausziehkraft der Schrauben bestimmt und mit der für Schrauben aus nur steinkohlenteerölgetränktem Holz verglichen. ns ergab sich eine Verbesserung dea Schraubennaltevermögens um durchschnittlich 40%. In einigen Fällen riß die Schraube ab, bevor sie aus dem Holz herausgezogen werden konnte.In the following example the implementation of the procedure and di. the effect achieved in this way is described in more detail. am piece of B-chnholz was in the usual Boiler pressure process impregnated with coal tar oil, thereby absorbing a protective agent by 145 @@@ wood was reached. Holes with a diameter were made in this wood The 80% of the core diameter of the screw was then drilled the holes are completely filled with the commercial product "Desmodur L", a diisocyanate, and then the screws were screwed in. After the fabric had been attached, the pull-out force became of screws intended and with that for screws out only coal tar oil soaked Compared to wood. ns there was an improvement in the screw durability by an average of 40%. In some cases the screw tore off before it came out of the wood could be pulled out.
Schrifttum Burmester, A. z Besseres Schraubenhaltevermögen von Holz durch Verwendung von Kunststoffmonomeren. Holz-Zentralblatt Bd. 92 (1966) Nr. 100, S. 1791/1792 Burmester, A.: Verbessertes Schraubenhaltevermögen von Holzspanplatten. Die Holzbearbeitung Bd. 14(1967) 11. 2, S. 19/20 Bürkle, H. u. J. Herzig: Ausdreh- und Ausziehversuche an Schwellenschrauben mit und ohne Kunstsoffdübel aus Puchenschwellen.Literature Burmester, A. z Better screw retention of wood by using plastic monomers. Holz-Zentralblatt Vol. 92 (1966) No. 100, S. 1791/1792 Burmester, A .: Improved screw retention of chipboard. Die Holzverarbeitung Vol. 14 (1967) 11.2, S. 19/20 Bürkle, H. and J. Herzig: Turning and pull-out tests on sleeper screws with and without plastic dowels from Puch sleepers.
Holz-Zentralblait Bd. 96 (1970) Nr. 36/37, S. 566, 568Holz-Zentralblait Vol. 96 (1970) No. 36/37, pp. 566, 568
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702055179 DE2055179C3 (en) | 1970-11-03 | Use of a synthetic resin to improve the screw holding capacity of railway sleepers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702055179 DE2055179C3 (en) | 1970-11-03 | Use of a synthetic resin to improve the screw holding capacity of railway sleepers |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2055179A1 true DE2055179A1 (en) | 1972-05-04 |
DE2055179B2 DE2055179B2 (en) | 1976-03-11 |
DE2055179C3 DE2055179C3 (en) | 1976-11-04 |
Family
ID=
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0183667A2 (en) * | 1984-11-26 | 1986-06-04 | Lacani Ab | A method for treating nails |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0183667A2 (en) * | 1984-11-26 | 1986-06-04 | Lacani Ab | A method for treating nails |
EP0183667A3 (en) * | 1984-11-26 | 1987-08-05 | Lacani Ab | A method for treating nails |
Also Published As
Publication number | Publication date |
---|---|
DE2055179B2 (en) | 1976-03-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
8330 | Complete disclaimer |