WO2001049469A1 - Apparatus for debarking logs or for preparing logs for debarking - Google Patents

Apparatus for debarking logs or for preparing logs for debarking Download PDF

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Publication number
WO2001049469A1
WO2001049469A1 PCT/FI2000/001103 FI0001103W WO0149469A1 WO 2001049469 A1 WO2001049469 A1 WO 2001049469A1 FI 0001103 W FI0001103 W FI 0001103W WO 0149469 A1 WO0149469 A1 WO 0149469A1
Authority
WO
WIPO (PCT)
Prior art keywords
drum
logs
space
bark
inner member
Prior art date
Application number
PCT/FI2000/001103
Other languages
French (fr)
Inventor
Ari Hannimäki
Original Assignee
Andritz Ag
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 Andritz Ag filed Critical Andritz Ag
Priority to NZ519650A priority Critical patent/NZ519650A/en
Priority to AU23773/01A priority patent/AU773925B2/en
Priority to BRPI0016823-8A priority patent/BR0016823B1/en
Publication of WO2001049469A1 publication Critical patent/WO2001049469A1/en

Links

Classifications

    • 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

Definitions

  • the invention relates to an apparatus for debarking logs or preparing logs for separately performed debarking - especially logs that are difficult to debark - the apparatus comprising a drum rotating about its central axis, through the space limited by the cylindrical inner sleeve of which drum the logs to be treated are fed, whereby they are subjected to abrasion and impact blows to treat the bark.
  • the bark peels off as long strips or large slabs, in which case the peeled bark tends to leave the drum together with the logs at the discharge end of the debarking drum.
  • Many deciduous trees such as eucalyptus, acacia, hickory and birch, are this type of trees that are difficult to debark.
  • the problem may, however, also be that the bark is very tightly attached to the log, which means that debarking the log in a conventional debarking drum is slow.
  • a problem may in addition be presented by the fact that they - especially small logs - break easily in the debarking drum.
  • the object of the invention is to provide an apparatus in which the logs treated inside a rotating drum can be subjected to various treatments for detaching the bark, and which apparatus can also be used for logs that break easily and are difficult to debark.
  • the apparatus relating to the invention is characterised in that an inner member is formed inside the drum, the said member being arranged to divide the space limited by the cylindrical inner sleeve of the drum into a treatment space proper and a space remaining outside it, whereby the logs fed through the drum are arranged to travel through the drum via the said treatment space.
  • the logs will travel through the drum in a substantially more parallel manner than without the inner member. Since the logs are not able to settle crosswise in the drum, the logs will also not break very easily.
  • the treatment space limited by the inner member from the drum is preferably elongated in cross-section.
  • the arrangement is such that a number of blades for treating the logs fed through the drum are arranged to project from the surface of the cylindrical inner sleeve of the drum, the blades being arranged to cut or tear the surface of the logs being treated by the effect of the mutual movement of the drum and the logs.
  • the bark will then be cut off and detach as pieces of suitable size during the said treatment or the actual debarking treatment following it.
  • Figure 1 shows the apparatus relating to the invention as a perspective view.
  • Figure 2 shows the apparatus relating to the invention as a side view.
  • Figure 3 shows a section along line Ill-Ill in Figure 2 .
  • Figure 4 shows a blade projecting from the inner sleeve of the drum.
  • Figure 5 shows a section along line V-V in Figure 4 .
  • the apparatus for debarking logs or preparing logs for separately performed debarking - especially logs that are difficult to debark - is shown as a diagrammatic perspective view in Figure 1.
  • the apparatus is shown from the discharge end side.
  • Figure 2 shows a side view of the apparatus, where the direction of feed of the logs is marked with arrow A.
  • Figure 3 further shows a section of Figure 2 along line Ill-Ill.
  • the apparatus comprises a drum 3 rotating about its central axis 2, through the space limited by the cylindrical inner sleeve 4 of which drum the logs 1 to be treated are fed, whereby they are subjected to abrasion and impact blows to treat the bark.
  • the drum 3 is supported into an inclined position in such a way that its central axis 2 forms a sharp angle ⁇ with respect to the horizontal plane.
  • the magnitude of the angle ⁇ is within the range from 2 to 12°. A typical value is approximately 5°.
  • the drum 3 is supported from the outside on wheels 12 and provided with means designated generally by reference numeral 13 for rotating the drum 3.
  • an inner member 5 which is either fixed or adjustable to the desired position.
  • the member 5 is arranged to extend to the desired area of the drum 3, in other words, over the entire length of the drum or only a portion of its length, and arranged to divide the space limited by the cylindrical inner sleeve 4 of the drum 3 into a treatment space proper 6 and a space 7 remaining outside it.
  • the logs 1 fed through the drum 3 are then arranged to travel through the drum 3 via the said treatment space 6.
  • the treatment space 6 is thus comprised of a channel open at both ends, which is inside the drum 3, the inner sleeve surface of which channel is formed, on the one hand, by the solid wall 17 formed by the inner member 5 adjusted to the desired location, and on the other hand by the part of the rotating inner sleeve 4 of the drum 3 at the said wall.
  • the relative movement between the logs 1 and the inner sleeve 4 of the drum 3 can be changed by changing the position of the inner member 5.
  • a number of blades 11 for treating the logs 1 fed through the drum 3 are arranged to project from the surface of the cylindrical inner sleeve 4 of the drum 3.
  • the blades 11 tear the bark of the logs 1 being treated or make crosswise cuts in the bark at suitable intervals, which means that the bark will detach more easily and at the same time as pieces of suitable size during preparation or subsequently in the actual debarking drum.
  • the inner member 5 is arranged to rotate about the central axis 2 of the drum 3.
  • the inner member 5 may also be mounted so as not to rotate with respect to the drum.
  • the inner member 5 is supported at both ends by means of suitable beams 14 and supporting bearings 16 on the framework of the apparatus.
  • the inner member 5 is locked in its normal position formed by its actual operating position by means of an actuator 15.
  • One end of the actuator 15, which may be comprised of, for example, a draw-spring, is attached to the solid framework 14 and the other end to the inner member 5.
  • the inner member 5 is arranged to rotate away from its operating position or normal position when a force exceeding the predetermined force is directed at the inner member 5 and, correspondingly, to return to its normal position when the said force exceeding the predetermined force ceases to act.
  • This type of force may appear if bark of wood wedges in the slot 9 between the drum 3 rotating in the direction of arrow B and the inner member 5 of the inner sleeve 4, which means that damage caused by the sudden jamming of the drum 3 and the inner member 5 can be reduced or completely avoided.
  • the angle of inclination ⁇ of the drum 3 is sufficient to bring about a progressive movement of the logs 1 in the direction of arrow A, if the angle of inclination ⁇ is sufficiently large.
  • the protrusions 8 enhance the progression of the logs in the drum 3 and reduce strains on the inner sleeve 4 of the drum 3.
  • the blades 11 are arranged to project further from the surface of the inner sleeve 4 of the drum 3 towards the central axis 2 of the drum 3 than the ridge-like protrusions 8, so that when the drum 3 rotates and the logs 1 rest on the ridge-like protrusions 8, the blades 11 will cut or tear the surface of the logs 1 and thus cut the bark.
  • the wall 17 formed by the inner member 5 is shaped as a wedge-like beak 18 at the lower end, in such a way that the rotary movement of the drum 3 will force the logs 1 to move in the manner shown by arrow C in Figure 3, as guided by the wall 17 of the inner member 5 and the inner sleeve 4 of the drum 3.
  • a slot 9 for discharging bark from the treatment space 6 to the space 7 on the opposite side of the wall 17 of the inner member 5.
  • the slot 9 is dimensioned in such a way that it expands towards the said free space 7, which facilitates the discharge of bark through the slot 9 towards the space 7.
  • a bark space 10 from which the bark is arranged to be discharged automatically by means of devices not shown.
  • the bark is arranged to be discharged from the said space 10 by the effect of the rotary movement of the drum 3 and the inclination of the drum 3 acting with it and/or the spiral protrusion 8 provided on the inner surface 4 of the drum 3.
  • the drum 3 may, in principle, rotate in a direction opposite to the direction of arrow B, in which case also the movement of the logs 1 will also be in a direction opposite to arrow C.
  • the bark cannot be discharged through the slot 9, but only through both ends of the drum 3, primarily from the discharge end, and/or through the bark apertures (not shown) in the sleeve.
  • Figures 4 and 5 show an example of the attachment of the blade 11 to the drum 3.
  • an aperture 20 for the blade 11 On the inner sleeve 4 of the drum 3 is formed an aperture 20 for the blade 11.
  • a support plate 21 having an aperture of corresponding size and matching with aperture 20, and threaded holes 22 for the fixing screws 23 of the blade 11.
  • the blade 11 is welded to a protrusion piece 24 which protrusion piece is in turn joined with an attachment plate 25.
  • the attachment plate is attached to the support plate 21 by means of screws 23.
  • the required number of spacer plates 26 has been fitted between the support plate 21 and the attachment plate 25. Due to this arrangement, the blade 11 can easily be replaced from the outside of the drum 3.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Fish Paste Products (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

The invention relates to an apparatus for debarking logs (1) or preparing logs for separately performed debarking - especially logs that are difficult to debark - the apparatus comprising a drum (3) rotating about its central axis (2), through the space limited by the cylindrical inner sleeve (4) of which drum the logs (1) to be treated are fed, whereby the logs are subjected to abrasion and impact blows in order to treat the bark. Inside the drum (3) is formed an inner member (5), which member is arranged to divide the space limited by the cylindrical inner sleeve (4) of the drum (3) into a treatment space (6) proper and a space (7) remaining outside of it, whereby the logs (1) fed through the drum (3) are arranged to travel through the drum (3) via the said treatment space (6).

Description

APPARATUS FOR DEBARKING LOGS OR FOR PREPARING LOGS FOR
DEBARKING
The invention relates to an apparatus for debarking logs or preparing logs for separately performed debarking - especially logs that are difficult to debark - the apparatus comprising a drum rotating about its central axis, through the space limited by the cylindrical inner sleeve of which drum the logs to be treated are fed, whereby they are subjected to abrasion and impact blows to treat the bark.
From the viewpoint of the quality of the pulp it is important to keep the amount of bark passing to chipping with the logs as small as possible. The removal of the bark from the surface of the logs usually takes place in a debarking drum in which the mutual movement and abrasion of the logs against one another bring about the debarking of the logs. The loose, finely crushed bark falls for the most part through the bark apertures in the drum to a bark conveyor under the drum.
With some wood species, the bark peels off as long strips or large slabs, in which case the peeled bark tends to leave the drum together with the logs at the discharge end of the debarking drum. Many deciduous trees, such as eucalyptus, acacia, hickory and birch, are this type of trees that are difficult to debark. The problem may, however, also be that the bark is very tightly attached to the log, which means that debarking the log in a conventional debarking drum is slow. With some wood species, a problem may in addition be presented by the fact that they - especially small logs - break easily in the debarking drum.
The object of the invention is to provide an apparatus in which the logs treated inside a rotating drum can be subjected to various treatments for detaching the bark, and which apparatus can also be used for logs that break easily and are difficult to debark.
According to invention, this object has been achieved in such a way, and the apparatus relating to the invention is characterised in that an inner member is formed inside the drum, the said member being arranged to divide the space limited by the cylindrical inner sleeve of the drum into a treatment space proper and a space remaining outside it, whereby the logs fed through the drum are arranged to travel through the drum via the said treatment space.
Thanks to this arrangement, the logs will travel through the drum in a substantially more parallel manner than without the inner member. Since the logs are not able to settle crosswise in the drum, the logs will also not break very easily.
The treatment space limited by the inner member from the drum is preferably elongated in cross-section.
In one preferred embodiment of the invention, the arrangement is such that a number of blades for treating the logs fed through the drum are arranged to project from the surface of the cylindrical inner sleeve of the drum, the blades being arranged to cut or tear the surface of the logs being treated by the effect of the mutual movement of the drum and the logs. The bark will then be cut off and detach as pieces of suitable size during the said treatment or the actual debarking treatment following it.
Further preferable developments of the invention are disclosed in the dependent claims.
The invention is described in greater detail in the following, with reference to the appended drawings, in which
Figure 1 shows the apparatus relating to the invention as a perspective view.
Figure 2 shows the apparatus relating to the invention as a side view.
Figure 3 shows a section along line Ill-Ill in Figure 2 .
Figure 4 shows a blade projecting from the inner sleeve of the drum. Figure 5 shows a section along line V-V in Figure 4 .
The apparatus for debarking logs or preparing logs for separately performed debarking - especially logs that are difficult to debark - is shown as a diagrammatic perspective view in Figure 1. The apparatus is shown from the discharge end side. Figure 2 shows a side view of the apparatus, where the direction of feed of the logs is marked with arrow A. Figure 3 further shows a section of Figure 2 along line Ill-Ill.
The apparatus comprises a drum 3 rotating about its central axis 2, through the space limited by the cylindrical inner sleeve 4 of which drum the logs 1 to be treated are fed, whereby they are subjected to abrasion and impact blows to treat the bark. The drum 3 is supported into an inclined position in such a way that its central axis 2 forms a sharp angle α with respect to the horizontal plane. The magnitude of the angle α is within the range from 2 to 12°. A typical value is approximately 5°.
In the example shown in the drawing, the drum 3 is supported from the outside on wheels 12 and provided with means designated generally by reference numeral 13 for rotating the drum 3.
For the sake of clarity, both the conveyor by means of which the logs 1 are fed to the drum 3, and the conveyor by means of which the logs 1 discharged from the discharge end of the drum 3 are conveyed to further treatment stages, have been omitted from the drawings.
Inside the drum 3 is formed an inner member 5 which is either fixed or adjustable to the desired position. The member 5 is arranged to extend to the desired area of the drum 3, in other words, over the entire length of the drum or only a portion of its length, and arranged to divide the space limited by the cylindrical inner sleeve 4 of the drum 3 into a treatment space proper 6 and a space 7 remaining outside it. The logs 1 fed through the drum 3 are then arranged to travel through the drum 3 via the said treatment space 6. The treatment space 6 is thus comprised of a channel open at both ends, which is inside the drum 3, the inner sleeve surface of which channel is formed, on the one hand, by the solid wall 17 formed by the inner member 5 adjusted to the desired location, and on the other hand by the part of the rotating inner sleeve 4 of the drum 3 at the said wall.
The relative movement between the logs 1 and the inner sleeve 4 of the drum 3 can be changed by changing the position of the inner member 5.
A number of blades 11 for treating the logs 1 fed through the drum 3 are arranged to project from the surface of the cylindrical inner sleeve 4 of the drum 3. The blades 11 tear the bark of the logs 1 being treated or make crosswise cuts in the bark at suitable intervals, which means that the bark will detach more easily and at the same time as pieces of suitable size during preparation or subsequently in the actual debarking drum.
As seen best in Figures 1 and 3, the inner member 5 is arranged to rotate about the central axis 2 of the drum 3. The inner member 5 may also be mounted so as not to rotate with respect to the drum. For the purpose of rotating, the inner member 5 is supported at both ends by means of suitable beams 14 and supporting bearings 16 on the framework of the apparatus. As seen best in Figure 3, the inner member 5 is locked in its normal position formed by its actual operating position by means of an actuator 15. One end of the actuator 15, which may be comprised of, for example, a draw-spring, is attached to the solid framework 14 and the other end to the inner member 5.
In one embodiment, the inner member 5 is arranged to rotate away from its operating position or normal position when a force exceeding the predetermined force is directed at the inner member 5 and, correspondingly, to return to its normal position when the said force exceeding the predetermined force ceases to act. This type of force may appear if bark of wood wedges in the slot 9 between the drum 3 rotating in the direction of arrow B and the inner member 5 of the inner sleeve 4, which means that damage caused by the sudden jamming of the drum 3 and the inner member 5 can be reduced or completely avoided. In the example shown in Figure 1 , on the surface of the inner sleeve 4 of the drum 3 are arranged one, or most preferably several, ridge-like protrusions 8 winding in a spiral manner with respect to the central axis of the drum. In the example shown in Figure 1 , where the drum 3 is arranged to rotate in the direction of arrow B, the ridge-like protrusion 8 forms a right-hand wind. In this case, the rotary movement of the drum 3 brings about a force directed at the discharge end of the drum 3 on the logs 1 resting against the protrusions 8, that is, a force in the direction of arrow A shown in Figure 2.
In principle, the angle of inclination α of the drum 3 is sufficient to bring about a progressive movement of the logs 1 in the direction of arrow A, if the angle of inclination α is sufficiently large. However, the protrusions 8 enhance the progression of the logs in the drum 3 and reduce strains on the inner sleeve 4 of the drum 3.
When using ridge-like protrusions 8, the blades 11 are arranged to project further from the surface of the inner sleeve 4 of the drum 3 towards the central axis 2 of the drum 3 than the ridge-like protrusions 8, so that when the drum 3 rotates and the logs 1 rest on the ridge-like protrusions 8, the blades 11 will cut or tear the surface of the logs 1 and thus cut the bark.
The wall 17 formed by the inner member 5 is shaped as a wedge-like beak 18 at the lower end, in such a way that the rotary movement of the drum 3 will force the logs 1 to move in the manner shown by arrow C in Figure 3, as guided by the wall 17 of the inner member 5 and the inner sleeve 4 of the drum 3. Between the said wedge-like beak 18 of the inner member 5 and the inner sleeve 4 of the drum is provided a slot 9 for discharging bark from the treatment space 6 to the space 7 on the opposite side of the wall 17 of the inner member 5. The slot 9 is dimensioned in such a way that it expands towards the said free space 7, which facilitates the discharge of bark through the slot 9 towards the space 7.
In space 7 is arranged a bark space 10 from which the bark is arranged to be discharged automatically by means of devices not shown. Alternatively, the bark is arranged to be discharged from the said space 10 by the effect of the rotary movement of the drum 3 and the inclination of the drum 3 acting with it and/or the spiral protrusion 8 provided on the inner surface 4 of the drum 3.
In the example shown in Figure 3, the drum 3 may, in principle, rotate in a direction opposite to the direction of arrow B, in which case also the movement of the logs 1 will also be in a direction opposite to arrow C. In this case, the bark cannot be discharged through the slot 9, but only through both ends of the drum 3, primarily from the discharge end, and/or through the bark apertures (not shown) in the sleeve.
Figures 4 and 5 show an example of the attachment of the blade 11 to the drum 3. On the inner sleeve 4 of the drum 3 is formed an aperture 20 for the blade 11. Around the aperture 20, outside the drum 3, is welded a support plate 21 having an aperture of corresponding size and matching with aperture 20, and threaded holes 22 for the fixing screws 23 of the blade 11. The blade 11 is welded to a protrusion piece 24 which protrusion piece is in turn joined with an attachment plate 25. The attachment plate is attached to the support plate 21 by means of screws 23. In order to provide the blade 11 with the desired protrusion a from the surface of the inner sleeve 4, the required number of spacer plates 26 has been fitted between the support plate 21 and the attachment plate 25. Due to this arrangement, the blade 11 can easily be replaced from the outside of the drum 3.

Claims

Claims
1. An apparatus for debarking logs (1 ) or preparing logs for separately performed debarking - especially logs that are difficult to debark - the apparatus comprising a drum (3) rotating about its central axis (2), through the space limited by the cylindrical inner sleeve (4) of which drum the logs (1 ) to be treated are fed, whereby they are subjected to abrasion and impact blows in order to treat the bark, an inner member (5) is formed inside the drum (3), the said member being arranged to divide the space limited by the cylindrical inner sleeve (4) of the drum (3) into a treatment space (6) proper and a space (7) remaining outside it, whereby the logs (1) fed through the drum (3) are arranged to travel through the drum (3) via the said treatment space (6), characterised in that between the inner member (5) and the inner sleeve (4) of the drum (3) is provided a slot (9) for discharging bark from the treatment space (6) to the space (7) on the opposite side of the inner member (5).
2. An apparatus as claimed in claim 1 , characterised in that in the said space (7) is arranged a bark space (10) from which the bark is arranged to be discharged by the effect of the rotary movement of the drum (3) and the inclination of the drum (3) acting with it and/or the spiral protrusion (8) provided on the inner surface (4) of the drum (3).
3. An apparatus as claimed in claim 1 , characterised in that in the said space (7) is arranged a bark space (10) from which the bark is arranged to be discharged automatically.
4. An apparatus as claimed in claim 1 , characterised in that the treatment space (6) limited by the inner member (5) from the drum (3) is elongated in cross- section.
5. An apparatus as claimed in claim 1, characterised in that a number of blades (11 ) for treating the logs (1 ) fed through the drum (3) are arranged to project from the surface of the cylindrical inner sleeve (4) of the drum (3), the blades (11 ) being arranged to cut or tear the surface of the logs (1 ) being treated by the effect of the mutual movement of the drum (3) and the logs (1 ).
6. An apparatus as claimed in claim 1 , characterised in that the angle of inclination (α) of the central axis (2) of the drum (3) with respect to the horizontal plane is within the range from 2 to 12°.
7. An apparatus as claimed in claim 1 , characterised in that the inner member (5) is arranged to rotate about the central axis (2) of the drum (3).
8. An apparatus as claimed in claim 5, characterised in that the inner member (5) has a certain normal position from which it is arranged to rotate away when a force exceeding the predetermined force is directed at the inner member (5), and to return to its normal position when the said force exceeding the predetermined force ceases to act.
9. An apparatus as claimed in claim 1 , characterised in that on the surface of the inner sleeve (4) of the drum (3) are arranged one or more protrusions (8) which are spiral with respect to the central axis (2) of the drum.
PCT/FI2000/001103 1999-12-31 2000-12-15 Apparatus for debarking logs or for preparing logs for debarking WO2001049469A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NZ519650A NZ519650A (en) 1999-12-31 2000-12-15 Apparatus for debarking logs or for preparing logs for debarking
AU23773/01A AU773925B2 (en) 1999-12-31 2000-12-15 Apparatus for debarking logs or for preparing logs for debarking
BRPI0016823-8A BR0016823B1 (en) 1999-12-31 2000-12-15 apparatus for removing bark from logs or preparing logs for bark removal separately.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI19992841 1999-12-31
FI992841A FI112183B (en) 1999-12-31 1999-12-31 Device for barking or pretreatment for barking of trees

Publications (1)

Publication Number Publication Date
WO2001049469A1 true WO2001049469A1 (en) 2001-07-12

Family

ID=8555851

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2000/001103 WO2001049469A1 (en) 1999-12-31 2000-12-15 Apparatus for debarking logs or for preparing logs for debarking

Country Status (8)

Country Link
CN (1) CN1187172C (en)
AU (1) AU773925B2 (en)
BR (1) BR0016823B1 (en)
ES (1) ES2233156B1 (en)
FI (1) FI112183B (en)
NZ (1) NZ519650A (en)
WO (1) WO2001049469A1 (en)
ZA (1) ZA200204856B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104070583A (en) * 2014-04-22 2014-10-01 湖北工业大学 Split-ring sliding barrel type log peeling machine
US11904495B2 (en) 2019-04-12 2024-02-20 Veisto Oy Log handling device and method for log handling

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20021134A (en) * 2002-06-12 2003-12-13 Metso Paper Inc Drum barking process and separation of bark from a wood flow
WO2006060855A1 (en) * 2004-12-09 2006-06-15 Radial Corporation Limited Material handling for radial timber sawing
CN102441927A (en) * 2011-12-01 2012-05-09 镇江中福马机械有限公司 Running control device for peeler motor
CN102613018B (en) * 2012-03-05 2014-11-12 李金鑫 Full-automatic fruit tree barker
CN104908131A (en) * 2015-06-25 2015-09-16 吉首大学 Straight cylinder straight propeller type branch-equipped mullberry twig peeling apparatus
CN104875263A (en) * 2015-06-25 2015-09-02 吉首大学 Screw drum screw propeller type mulberry twig peeling device
CN104875262A (en) * 2015-06-25 2015-09-02 吉首大学 Straight-barrel straight-paddle type mulberry twig peeling device
CN106564096B (en) * 2016-11-15 2018-10-30 宣城市宣州区峰刚木工板厂 A kind of trees rossing debranching cutting integration apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807470A (en) * 1972-10-16 1974-04-30 Ingersoll Rand Canada Drum-type debarking apparatus
US3923087A (en) * 1972-07-24 1975-12-02 Ingersoll Rand Canada Drum-type debarking apparatus including log deflector means
US3948300A (en) * 1971-08-31 1976-04-06 Canadian Ingersoll-Rand Company Ltd. Debarking apparatus including log velocity controlling means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948300A (en) * 1971-08-31 1976-04-06 Canadian Ingersoll-Rand Company Ltd. Debarking apparatus including log velocity controlling means
US3923087A (en) * 1972-07-24 1975-12-02 Ingersoll Rand Canada Drum-type debarking apparatus including log deflector means
US3807470A (en) * 1972-10-16 1974-04-30 Ingersoll Rand Canada Drum-type debarking apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104070583A (en) * 2014-04-22 2014-10-01 湖北工业大学 Split-ring sliding barrel type log peeling machine
US11904495B2 (en) 2019-04-12 2024-02-20 Veisto Oy Log handling device and method for log handling

Also Published As

Publication number Publication date
BR0016823A (en) 2002-08-27
FI19992841A (en) 2001-07-01
ZA200204856B (en) 2003-03-17
CN1413140A (en) 2003-04-23
ES2233156B1 (en) 2006-03-16
FI112183B (en) 2003-11-14
AU773925B2 (en) 2004-06-10
BR0016823B1 (en) 2010-08-24
ES2233156A1 (en) 2005-06-01
NZ519650A (en) 2004-03-26
AU2377301A (en) 2001-07-16
CN1187172C (en) 2005-02-02

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