CA1335169C - Debarking drum - Google Patents
Debarking drumInfo
- Publication number
- CA1335169C CA1335169C CA 610018 CA610018A CA1335169C CA 1335169 C CA1335169 C CA 1335169C CA 610018 CA610018 CA 610018 CA 610018 A CA610018 A CA 610018A CA 1335169 C CA1335169 C CA 1335169C
- Authority
- CA
- Canada
- Prior art keywords
- drum
- debarking
- lifting rods
- catches
- projections
- 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
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
- B27L1/02—Debarking or removing vestiges of branches from trees or logs; Machines therefor by rubbing the trunks against each other; Equipment for wet practice
- B27L1/025—Debarking in rotating drums
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Processing Of Solid Wastes (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention relates to a debarking drum, in particular dry debarking drum, in the form of a hollow cylinder, in particular having a horizontal axis of rotation, catches or projections, preferably rods or the like, in particular lifting rods or lifting irons, being provided on the inner shell of the drum directed towards its interior and preferably evenly distributed over the drum circumference and conveniently extending parallel to the drum axis. The main object of the invention is the reduction of the losses of wood and of the noise and vibration emissions during the debarking operation and the increase of the debarking output.
This is achieved mainly in that zone(s) provided with catches or lifting rods or the like viewed in axial direction on the inner shell of the drum alternate with zone(s) free of catches, projections or lifting rods, and the inner shell area viewed in axial direction provided with catches, projections or lifting rods or the like is interrupted by at least one area free of catches, projections, lifting rods or the like, the inner zone(s) or inner shell area(s) or this sliding surface or sliding layer conveniently being coated with low-friction material, for instance smooth plastics material plates or composite material consisting on its surface or sliding layer of plastics materials such as polyethylene and underneath this a damping or supporting layer of consisting elastomers, such as rubber, or lined therewith.
This is achieved mainly in that zone(s) provided with catches or lifting rods or the like viewed in axial direction on the inner shell of the drum alternate with zone(s) free of catches, projections or lifting rods, and the inner shell area viewed in axial direction provided with catches, projections or lifting rods or the like is interrupted by at least one area free of catches, projections, lifting rods or the like, the inner zone(s) or inner shell area(s) or this sliding surface or sliding layer conveniently being coated with low-friction material, for instance smooth plastics material plates or composite material consisting on its surface or sliding layer of plastics materials such as polyethylene and underneath this a damping or supporting layer of consisting elastomers, such as rubber, or lined therewith.
Description
The present invention relates to a debarking drum for debarking timber, and in particular a dry debarking drum in the form of a hollow cylinder, preferably with a shell essentially consisting of metal.
The shell is provided with orifices or slots for discharging the bark material, conveniently a solid sheet steel shell, in particular having a horizontal or essentially horizontal axis of rotation, both front faces of the drum conveniently being open or essentially open. Catches or projections, preferably lo rods or the like, in particular lifting rods or lifting irons, are provided on the inner shell of the drum directed towards its interior and preferably evenly distributed over the drum circumference and conveniently extending parallel to the drum axis. The catches or projections or rods consist of elastic material or elastomers, conveniently of rubber, mechanically resistant materials with surfaces coated therewith, conveniently metal, in particular aluminum or steel, or uncoated metal, conveniently steel or aluminum.
The drum is conveniently supported on the outside on wear-proof, in particular hard metal rolls, on rings or rolls orpacks of rings or rolls, conveniently with steel inserts, conveniently coated with rubber, polyurethane or the like or consisting of hard rubber or plastics material, or on car tires or the like, via which the drum can be driven by means of friction generated by an electric motor, conveniently at an adjustable speed.
The drum can also be supported on hydrostatic bearing units.
In the case of hard or hydrostatically supported drums, the drive is conveniently positive, i.e not by friction. Not only electric motors, but also hydraulic drives are suitable.
26a~ f A ~ Tt 13 an objcct of th~-invention to roduco loss of timber and noise and vibration emissions in debarking devices of this type and at the same time achieve a substantial increase in the debarking output.
J~ ~
The invention is based on debarking drums with a solid drum shell and projections provided on the inside of this shell such as are known, for instance, from AT-PS 130,037 and 348,246.
~5 ~ The ~j~ct of th~ invention is achieved by starting out from debarking drums, in particular dry debarking drums, in the form of hollow cylinders.
According to the invention, the problem is solved by providing, in particular for debarking short timber, a zone(s) provided with catches, projections, lifting rods or the like to alternate with a zone(s) free of catches, projections, lifting rods or the like, viewed in axial direction on the inner shell of the drum, or providing that the inner shell zone provided with catches, projections or lifting rods or the like is interrupted, viewed in axial direction, by at least one area free of catches, projections, lifting rods or the like, the inner zone(s) or the inner shell area(s) or this sliding surface or sliding layer conveniently being coated with low-friction material, for instance smooth plastics material plates or composite material consisting on its surface or sliding layer of plastics materials such as polyethylene and underneath this of a damping or supporting layer of elastomers, such as rubber, or a layer lined therewith. Since the zones containing catches, projections, lifting rods or the like are interrupted by zones not containing any such lifting rods or the like, the result is an additional relative movement of the logs to be debarked, which permits a substantial increase of the debarking output as compared to known embodiments comprising lifting rods extending over the entire length of the drum.
The additional relative movement constitutes additional friction of the logs rubbing against one another. A zone-wise interruption of the inner shell equipment of catches, lifting rods or the like, for instance over a longitudinal extension of one to five log lengths, results in a disorientation of the bulk of logs and thus in an increased relative movement of the material to be debarked. This results in an increased share of friction work as compared to embodiments having uninterrupted zones equipped with lifting rods or the like and thus in an increased debarking output.
It may be convenient if the length of zones or areas provided with in particular straight lifting rods or the like is of approximately the same length as the length of zones free of lifting rods or the like. The front face zones of the drum can be free of lifting rods.
For the operation of the debarking drum according to the invention, it may be particularly convenient if the lifting rods or the like extending over only a part of the length of the drum consist of rubber or any other elastic material such as hollow rubber rods, conveniently of approximately triangular or approximately semicircular cross section, with a supporting core made of metal, conveniently of steel, for obtaining a releasable connection with the inner shell of the drum, this connection being provided in the area of the basis of the triangle or in the area of the semicircle diameter and between these rubber rod areas, viewed in axial direction, the rodless inner wall zones, consisting of metal, to be provided with an elastomer, conveniently rubber layer with the surface of which facing the interior of the drum a polyethylene layer or the like is connected abrasion-proof.
In this way, the noise and vibration emissions can be considerably reduced, the low-friction or smooth material in the form of polyethylene-rubber composite material for the zone(s) free of lifting rods playing an essential part in this effect. Moreover, loss of timber is reduced.
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:-Figs. 1 and lA are diagrammatic representations of a debarking drum according to the present invention, in particular in the longitudinal section along plane A-B in Fig. 2 and 2A, partially in elevational view;
Fig. 2 and 2A show diagrammatic cross sections along plane C-D of Fig. 1 and lA; and Figs. 3 and 4 show details thereof, namely Fig. 3 shows a cross-sectional view of the drum wall in the area of the lifting rods and Fig. 4 shows a cross-sectional view in the area of a rodless zone.
Drum drives are sketched in Figs. lA and 2A.
In all the figures, like parts are designated by identical reference symbols.
The debarking drum 1 in the form of a hollow cylinder, in particular dry debarking drum, in the present case consists essentially of metal, conveniently steel. The drum axis 2 extends horizontally. The front faces 3 of the drum are essentially open. They may be partially closed adjacent the outer shell by means of a ring. Viewed in axial direction, zones 6 provided with lifting rods 4 alternate with rodless zones 6. As shown in Fig. 4, the inside of the metal or steel shell 7 is provided with a rubber coating 8 which is in turn lined with polyethylene g on the inside.
The lifting rods 4 are conveniently evenly distributed in their individual zones 6 over the circumference of the drum and thus at equal distance from one another. As indicated in Fig. 3, the lifting rods essentially consist of elastomers, in particular rubber 10. In the embodiment shown, it is a a metal, for instance steel, core 11, by means of which the rods are connected, in particular releasably, to the shell 7 of the drum, via anchorages, for instance anchor bolts, a rail 12 or the like.
Between the rods, there are slots or discharge openings 13 in the drum. The rods can also consist entirely of elastomers, such as rubber, and be firmly connected to the inner shell of the drum in any other form. Other elastic materials, such as elastic plastics materials, are also suitable materials for the rods.
As evident from Fig. lA and 2A, the drum is supported on the outside of its circumference on wear-proof, in particular hard metal rolls, on rings 14 or rolls coated with lo elastomers, for instance rubber, polyurethane and the like or consisting of hard rubber or plastics material, by supporting it for instance in rockers 16. The drive of the rings and thus the rotation of the debarking drum, which is in frictional engagement with the rings, is effected by an electric motor 16 whose speed is conveniently variable.
As initially mentioned, the drum could also be supported on rings or rolls or packs of rings or rolls, conveniently with steel inserts, or on car tires or the like, via which the drum can be driven by friction from an electric motor, conveniently with variable speed.
It is also possible to support the drum on hydrostatic bearing units. In the case of drums which are supported hard or hydrostatically, the drive is conveniently positive, thus not by means of friction. Not only electric motors, but also hydraulic drives may be used.
It is important to provide the rodless zone 6 on the inside of the drum with a low-friction or smooth material causing the aforementioned disorientation of the bulk of logs. An increased relative movement of the logs towards and away from one another is the result and increases the debarking output.
The low-friction lining shown in Fig. 4 consists of composite material with a surface layer of polyethylene 9 or the like firmly connected to a rubber basis 8. Other smooth plastics material plates can also be used.
The rodless zone(s) can have individual axial length(s) of one to five times the length of the logs to be barked. In this present case, these zones 6 have an axial length of one to five logs. One or more zone(s) 6 is (are) provided. It would be conceivable to make the zones 6 and 6 of equal lengths. In the instant case, both front face zones are provided with lifting rods, reference is made to Fig. lA in this context. But it may be more convenient to leave the zones on the front faces free of lifting rods.
As evident form Fig. 3, the cross-sectional shape of the lifting rods 4 can be approximately triangular. Semicircular cross sections are also suitable. If the connection to the inner shell of the drum is releasable, a replacement of the worn lifting rods is easier, which is of particular advantage when using rubber as the lifting rod material. Under certain circumstances, curved lifting rods or lifting rods in the form of conveyor cams or conveyor nubs could also be used.
The debarking drums according to the invention are particularly valuable for short timber of lengths up to 0.6 times the drum diameter.
The openings or slots for discharging the bark material can extend horizontally, parallel to the axis or obliquely.
Suitable drums are for instance those of a diameter of 3.6 to 6.6 meters , a length of 8 to 50 meters and rotation speeds of 3 to 5 rpm. Low-friction, smooth materials other than polyethylene, in particular plastics materials, or the uncoated or blank basic material of the drum (steel) are suitable for the inner surface of the rodless zones.
According to the invention, the interruption of the lifting rods, lifting irons or catches brings about a considerable reduction of the loss of timber and of the noise and vibration emissions at increased machine output and debarking output. The timber or bulk filling in operation is indicated with the reference symbol F and a hatching in Fig. 1, lA and 2, 2A. The debarking effect extends virtually over the entire bulk cross section.
The shell is provided with orifices or slots for discharging the bark material, conveniently a solid sheet steel shell, in particular having a horizontal or essentially horizontal axis of rotation, both front faces of the drum conveniently being open or essentially open. Catches or projections, preferably lo rods or the like, in particular lifting rods or lifting irons, are provided on the inner shell of the drum directed towards its interior and preferably evenly distributed over the drum circumference and conveniently extending parallel to the drum axis. The catches or projections or rods consist of elastic material or elastomers, conveniently of rubber, mechanically resistant materials with surfaces coated therewith, conveniently metal, in particular aluminum or steel, or uncoated metal, conveniently steel or aluminum.
The drum is conveniently supported on the outside on wear-proof, in particular hard metal rolls, on rings or rolls orpacks of rings or rolls, conveniently with steel inserts, conveniently coated with rubber, polyurethane or the like or consisting of hard rubber or plastics material, or on car tires or the like, via which the drum can be driven by means of friction generated by an electric motor, conveniently at an adjustable speed.
The drum can also be supported on hydrostatic bearing units.
In the case of hard or hydrostatically supported drums, the drive is conveniently positive, i.e not by friction. Not only electric motors, but also hydraulic drives are suitable.
26a~ f A ~ Tt 13 an objcct of th~-invention to roduco loss of timber and noise and vibration emissions in debarking devices of this type and at the same time achieve a substantial increase in the debarking output.
J~ ~
The invention is based on debarking drums with a solid drum shell and projections provided on the inside of this shell such as are known, for instance, from AT-PS 130,037 and 348,246.
~5 ~ The ~j~ct of th~ invention is achieved by starting out from debarking drums, in particular dry debarking drums, in the form of hollow cylinders.
According to the invention, the problem is solved by providing, in particular for debarking short timber, a zone(s) provided with catches, projections, lifting rods or the like to alternate with a zone(s) free of catches, projections, lifting rods or the like, viewed in axial direction on the inner shell of the drum, or providing that the inner shell zone provided with catches, projections or lifting rods or the like is interrupted, viewed in axial direction, by at least one area free of catches, projections, lifting rods or the like, the inner zone(s) or the inner shell area(s) or this sliding surface or sliding layer conveniently being coated with low-friction material, for instance smooth plastics material plates or composite material consisting on its surface or sliding layer of plastics materials such as polyethylene and underneath this of a damping or supporting layer of elastomers, such as rubber, or a layer lined therewith. Since the zones containing catches, projections, lifting rods or the like are interrupted by zones not containing any such lifting rods or the like, the result is an additional relative movement of the logs to be debarked, which permits a substantial increase of the debarking output as compared to known embodiments comprising lifting rods extending over the entire length of the drum.
The additional relative movement constitutes additional friction of the logs rubbing against one another. A zone-wise interruption of the inner shell equipment of catches, lifting rods or the like, for instance over a longitudinal extension of one to five log lengths, results in a disorientation of the bulk of logs and thus in an increased relative movement of the material to be debarked. This results in an increased share of friction work as compared to embodiments having uninterrupted zones equipped with lifting rods or the like and thus in an increased debarking output.
It may be convenient if the length of zones or areas provided with in particular straight lifting rods or the like is of approximately the same length as the length of zones free of lifting rods or the like. The front face zones of the drum can be free of lifting rods.
For the operation of the debarking drum according to the invention, it may be particularly convenient if the lifting rods or the like extending over only a part of the length of the drum consist of rubber or any other elastic material such as hollow rubber rods, conveniently of approximately triangular or approximately semicircular cross section, with a supporting core made of metal, conveniently of steel, for obtaining a releasable connection with the inner shell of the drum, this connection being provided in the area of the basis of the triangle or in the area of the semicircle diameter and between these rubber rod areas, viewed in axial direction, the rodless inner wall zones, consisting of metal, to be provided with an elastomer, conveniently rubber layer with the surface of which facing the interior of the drum a polyethylene layer or the like is connected abrasion-proof.
In this way, the noise and vibration emissions can be considerably reduced, the low-friction or smooth material in the form of polyethylene-rubber composite material for the zone(s) free of lifting rods playing an essential part in this effect. Moreover, loss of timber is reduced.
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:-Figs. 1 and lA are diagrammatic representations of a debarking drum according to the present invention, in particular in the longitudinal section along plane A-B in Fig. 2 and 2A, partially in elevational view;
Fig. 2 and 2A show diagrammatic cross sections along plane C-D of Fig. 1 and lA; and Figs. 3 and 4 show details thereof, namely Fig. 3 shows a cross-sectional view of the drum wall in the area of the lifting rods and Fig. 4 shows a cross-sectional view in the area of a rodless zone.
Drum drives are sketched in Figs. lA and 2A.
In all the figures, like parts are designated by identical reference symbols.
The debarking drum 1 in the form of a hollow cylinder, in particular dry debarking drum, in the present case consists essentially of metal, conveniently steel. The drum axis 2 extends horizontally. The front faces 3 of the drum are essentially open. They may be partially closed adjacent the outer shell by means of a ring. Viewed in axial direction, zones 6 provided with lifting rods 4 alternate with rodless zones 6. As shown in Fig. 4, the inside of the metal or steel shell 7 is provided with a rubber coating 8 which is in turn lined with polyethylene g on the inside.
The lifting rods 4 are conveniently evenly distributed in their individual zones 6 over the circumference of the drum and thus at equal distance from one another. As indicated in Fig. 3, the lifting rods essentially consist of elastomers, in particular rubber 10. In the embodiment shown, it is a a metal, for instance steel, core 11, by means of which the rods are connected, in particular releasably, to the shell 7 of the drum, via anchorages, for instance anchor bolts, a rail 12 or the like.
Between the rods, there are slots or discharge openings 13 in the drum. The rods can also consist entirely of elastomers, such as rubber, and be firmly connected to the inner shell of the drum in any other form. Other elastic materials, such as elastic plastics materials, are also suitable materials for the rods.
As evident from Fig. lA and 2A, the drum is supported on the outside of its circumference on wear-proof, in particular hard metal rolls, on rings 14 or rolls coated with lo elastomers, for instance rubber, polyurethane and the like or consisting of hard rubber or plastics material, by supporting it for instance in rockers 16. The drive of the rings and thus the rotation of the debarking drum, which is in frictional engagement with the rings, is effected by an electric motor 16 whose speed is conveniently variable.
As initially mentioned, the drum could also be supported on rings or rolls or packs of rings or rolls, conveniently with steel inserts, or on car tires or the like, via which the drum can be driven by friction from an electric motor, conveniently with variable speed.
It is also possible to support the drum on hydrostatic bearing units. In the case of drums which are supported hard or hydrostatically, the drive is conveniently positive, thus not by means of friction. Not only electric motors, but also hydraulic drives may be used.
It is important to provide the rodless zone 6 on the inside of the drum with a low-friction or smooth material causing the aforementioned disorientation of the bulk of logs. An increased relative movement of the logs towards and away from one another is the result and increases the debarking output.
The low-friction lining shown in Fig. 4 consists of composite material with a surface layer of polyethylene 9 or the like firmly connected to a rubber basis 8. Other smooth plastics material plates can also be used.
The rodless zone(s) can have individual axial length(s) of one to five times the length of the logs to be barked. In this present case, these zones 6 have an axial length of one to five logs. One or more zone(s) 6 is (are) provided. It would be conceivable to make the zones 6 and 6 of equal lengths. In the instant case, both front face zones are provided with lifting rods, reference is made to Fig. lA in this context. But it may be more convenient to leave the zones on the front faces free of lifting rods.
As evident form Fig. 3, the cross-sectional shape of the lifting rods 4 can be approximately triangular. Semicircular cross sections are also suitable. If the connection to the inner shell of the drum is releasable, a replacement of the worn lifting rods is easier, which is of particular advantage when using rubber as the lifting rod material. Under certain circumstances, curved lifting rods or lifting rods in the form of conveyor cams or conveyor nubs could also be used.
The debarking drums according to the invention are particularly valuable for short timber of lengths up to 0.6 times the drum diameter.
The openings or slots for discharging the bark material can extend horizontally, parallel to the axis or obliquely.
Suitable drums are for instance those of a diameter of 3.6 to 6.6 meters , a length of 8 to 50 meters and rotation speeds of 3 to 5 rpm. Low-friction, smooth materials other than polyethylene, in particular plastics materials, or the uncoated or blank basic material of the drum (steel) are suitable for the inner surface of the rodless zones.
According to the invention, the interruption of the lifting rods, lifting irons or catches brings about a considerable reduction of the loss of timber and of the noise and vibration emissions at increased machine output and debarking output. The timber or bulk filling in operation is indicated with the reference symbol F and a hatching in Fig. 1, lA and 2, 2A. The debarking effect extends virtually over the entire bulk cross section.
Claims (34)
1. A debarking drum for debarking timber, comprising a hollow cylinder with catches, projections or lifting rods, provided on the inner surface thereof and directed towards the interior thereof, and wherein said hollow cylinder has a shell, said shell has an inner zone, said inner shell zone being provided with catches, projections or lifting rods, said inner shell zone being interrupted, viewed in axial direction, by at least one zone free of catches, projections or lifting rods, wherein said zone(s) free of catches, projections or lifting rods contain(s) an inner cylinder surface or sliding surface coated with a low friction material.
2. A debarking drum as claimed in claim 1, wherein said catches, projections or lifting rods consist of an elastic material.
3. A debarking drum as claimed in claim 1, wherein said catches, projections or lifting rods consist of an elastomer.
4. A debarking drum as claimed in claim 1, wherein said catches, projections or lifting rods consist of a mechanically resistant material with surfaces coated with an elastomer or elastic material.
5. A debarking drum as claimed in claim 1, wherein said catches, projections or lifting rods consist of an uncoated metal.
6. A debarking drum as claimed in claim 1, wherein said zone(s) provided with catches, projections or lifting rods alternate with said zone(s) free of catches, projections or lifting rods, viewed in axial direction on said inner surface of the drum.
7. A debarking drum as claimed in claim 1, wherein said zone(s) free of catches, projections or lifting rods correspond(s) to about one to five times the length of a log to be debarked.
8. A debarking drum as claimed in claim 1, wherein the zones provided with lifting rods are provided with straight lifting rods and the length of these zones is approximately equal to the length of the zones free of lifting rods.
9. A debarking drum as claimed in claim 1 or 2, wherein the length of zones or areas provided with straight lifting rods is about half the size of the length of zones free of lifting rods, the front face zones of the drum being free of lifting rods.
10. A debarking drum as claimed in claim 1, wherein the lifting rods extending over only a part of the length of the drum consist of an elastic material.
11. A debarking drum as claimed in claim 10, wherein the lifting rods are hollow rubber rods.
12. A debarking drum as claimed in claim 11, wherein the lifting rods are hollow rubber rods of triangular cross section.
13. A debarking drum as claimed in claim 11, wherein the lifting rods are hollow rubber rods of semicircular cross section.
14. A debarking drum as claimed in claim 10, 11, 12 or 13, wherein the lifting rods have a supporting core made of metal for obtaining a releasable connection with said inner surface of the drum, said connection being provided in the area of the base of the rods.
15. A debarking drum as claimed in claim 14, wherein between the rubber rod areas, viewed in axial direction, the rodless inner wall zones consisting of metal are provided with an elastomer layer the surface of which faces the interior of the drum where a polyethylene layer is connected in an abrasion-proof manner.
16. A debarking drum as claimed in claim 1, wherein the drum is a dry debarking drum.
17. A debarking drum as claimed in claim 1, wherein the shell of the drum is made of metal.
18. A debarking drum as claimed in claim 1, wherein said shell has orifices or slots for discharging the bark material.
19. A debarking drum as claimed in claim 1, wherein said shell is a solid steel shell.
20. A debarking drum as claimed in claim 1, wherein said shell has a horizontal or essentially horizontal axis of rotation.
21. A debarking drum as claimed in claim 1, wherein the catches or projections provided on said inner surface of the drum directed towards its interior are evenly distributed over the drum circumference and extend parallel to the drum axis.
22. A debarking drum as claimed in claim 1, wherein the drum is supported on the outside of wear-proof hard metal rolls, on rings or rolls, or packs of rings or rolls.
23. A debarking drum as claimed in claim 22, wherein the wear-proof hard metal rolls have steel inserts coated with rubber or polyurethane, or consist of hard rubber or a plastic material.
24. A debarking drum as claimed in claim 22, wherein the drum is supported on car tires, via which the drum can be driven by means of friction generated by an electric motor, at adjustable speed.
25. A debarking drum as claimed in claim 1, wherein the drum is supported hydrostatically and driven by a positive drive.
26. A debarking drum as claimed in claim 1, wherein the low friction material consists of smooth plastic plates or a composite material consisting on its surface or sliding layer of a plastic material and underneath this of a damping or supporting surface of an elastomer or a surface lined therewith.
27. A debarking drum as claimed in claim 26, wherein said plastic material is polyethylene.
28. A debarking drum as claimed in claim 26, wherein said elastomer is rubber.
29. A debarking drum in the form of a hollow cylinder with a shell essentially consisting of metal and provided with orifices or slots for discharging bark material, having an essentially horizontal axis of rotation, the drum having two front faces, said two front faces being adapted so that they may be opened at least essentially, catches, projections, rods, lifting rods or lifting irons, said hollow cylinder having a shell, said shell having an inner shell zone, said catches, projections or rods being provided on the inner surface of said shell zone of the drum directed towards its interior, wherein those zones provided with catches, projections or lifting rods alternate with (a) zone(s) free of catches, projections or lifting rods - viewed in axial direction on the inner shell of the drum.
30. A debarking drum as claimed in claim 29, wherein the drum is a dry debarking drum.
31. A debarking drum according to claim 29, wherein the drum is supported on the outside on wear-proof rolls, via which the drum can be driven by means of friction generated by an electric motor.
32. A debarking drum as claimed in claim 29, wherein said inner zone(s) or said inner surface of said shell zone has a sliding surface or sliding layer coated with a low-friction material.
33. A debarking drum as claimed in claim 32, wherein said sliding layer consists of a plastic material or a composite material on the surface and of a damping or supporting surface of an elastomer.
34. A debarking drum as claimed in claim 33, wherein said elastomer is rubber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA2143/88 | 1988-09-01 | ||
| AT214388A AT397060B (en) | 1988-09-01 | 1988-09-01 | HOLLOW CYLINDRICAL, FULL-WALLED BLEEDING DRUM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1335169C true CA1335169C (en) | 1995-04-11 |
Family
ID=3528689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 610018 Expired - Lifetime CA1335169C (en) | 1988-09-01 | 1989-08-31 | Debarking drum |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT397060B (en) |
| BR (1) | BR8904397A (en) |
| CA (1) | CA1335169C (en) |
| DE (1) | DE3928550C2 (en) |
| ES (1) | ES2014909A6 (en) |
| FI (1) | FI95007C (en) |
| SE (1) | SE470399B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113819722A (en) * | 2021-09-01 | 2021-12-21 | 杭州临安南洋木工机械有限公司 | Wood drying equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB846254A (en) * | 1959-04-06 | 1960-08-31 | Ingersoll Rand Canada | Improvements in log debarking drum |
| US3136345A (en) * | 1961-05-11 | 1964-06-09 | Ibis Entpr Ltd | Barking drum |
| US3807470A (en) * | 1972-10-16 | 1974-04-30 | Ingersoll Rand Canada | Drum-type debarking apparatus |
| SE457628C (en) * | 1983-09-30 | 1990-09-10 | Skega Ab | SLIT ORGAN FOR BARK DRUM |
-
1988
- 1988-09-01 AT AT214388A patent/AT397060B/en not_active IP Right Cessation
-
1989
- 1989-08-25 SE SE8902830A patent/SE470399B/en not_active IP Right Cessation
- 1989-08-28 FI FI894023A patent/FI95007C/en active IP Right Grant
- 1989-08-29 DE DE19893928550 patent/DE3928550C2/en not_active Expired - Lifetime
- 1989-08-31 ES ES8902990A patent/ES2014909A6/en not_active Expired - Lifetime
- 1989-08-31 CA CA 610018 patent/CA1335169C/en not_active Expired - Lifetime
- 1989-08-31 BR BR8904397A patent/BR8904397A/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113819722A (en) * | 2021-09-01 | 2021-12-21 | 杭州临安南洋木工机械有限公司 | Wood drying equipment |
| CN113819722B (en) * | 2021-09-01 | 2022-08-16 | 杭州临安南洋木工机械有限公司 | Wood drying equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| SE470399B (en) | 1994-02-14 |
| FI894023A (en) | 1990-03-02 |
| AT397060B (en) | 1994-01-25 |
| DE3928550C2 (en) | 1994-11-24 |
| BR8904397A (en) | 1990-10-02 |
| SE8902830L (en) | 1990-03-02 |
| FI894023A0 (en) | 1989-08-28 |
| SE8902830D0 (en) | 1989-08-25 |
| ATA214388A (en) | 1993-06-15 |
| DE3928550A1 (en) | 1990-03-15 |
| FI95007B (en) | 1995-08-31 |
| FI95007C (en) | 1995-12-11 |
| ES2014909A6 (en) | 1990-07-16 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |