EP1703810B1 - Scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials - Google Patents
Scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials Download PDFInfo
- Publication number
- EP1703810B1 EP1703810B1 EP04820460A EP04820460A EP1703810B1 EP 1703810 B1 EP1703810 B1 EP 1703810B1 EP 04820460 A EP04820460 A EP 04820460A EP 04820460 A EP04820460 A EP 04820460A EP 1703810 B1 EP1703810 B1 EP 1703810B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- scraper
- cutter drum
- cutting
- shaft
- scraper according
- 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.)
- Not-in-force
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B7/00—Cutting tobacco
- A24B7/04—Cutting tobacco by machines with revolving knives
- A24B7/08—Cutting tobacco by machines with revolving knives with several knives which act one after the other
- A24B7/12—Cutting tobacco by machines with revolving knives with several knives which act one after the other with cutter axes transverse to the feeding direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
- B26D7/088—Means for treating work or cutting member to facilitate cutting by cleaning or lubricating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
- B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
- B26D1/36—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and rotating continuously in one direction during cutting, e.g. mounted on a rotary cylinder
Definitions
- This invention relates to a scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials.
- Such a device is known from the document GB-A 662 790 .
- a knife or a plurality of knives is mounted on the circumferential surface of a rotary cutter drum of a cutting machine, as presented in previous applications to ITM Poland Ltd.
- the materials are wetted so that moisture content is appropriate for the organic plant material type and the type of the process/treatment being carried out.
- the organic plant materials, particularly tobacco materials may be subjected to liquids of much higher density and viscosity than those of water, remaining partially on external surfaces of the processed particles.
- the compressing force is applied, keeping the continuously fed material within the cutting zone, as well as the cutting/comminuting forces are applied. Mainly under these forces some of viscous liquids are squeezed out from a portion of the plant material, the liquids, when mixed with particles of the organic plant material dust, particularly tobacco, tending do settle in the nearest neighbourhood of the cutting/comminuting knives.
- the settling process of the combination of the above mentioned liquids and the dust as tiny particles causes building up a layer which hardens when drying and adversely affects the subsequent cutting/comminuting process.
- the scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials is characterised in that the scraper is mounted in a holder of the rotary shaft of the scraper coupled with the cutter drum shaft, the shaft of the scraper and the cutter drum having a common drive.
- ratios of the thickness T of the material of the scraper to its working length L satisfy the relationship: L T ⁇ e , where e is the base of the natural logarithm.
- the dependency: L ⁇ D 3 is satisfied between the diameter D of the cutter drum of the cutting machine and the working length L of the scraper.
- the cutter drum shaft is coupled with the rotary shaft of the scraper via an assembly of tensioners with a driving tension member, which, preferably, has a form of a toothed belt.
- the scraper is located on the side of the cutter drum opposite relative to the cutting/comminution zone.
- the holder is mounted on the rotary -shaft at two points.
- the holder is mounted on the rotary -shaft at three points.
- the above mentioned dependency is 16:3, 16:5 or 16:7 so that the scraper removes the buildup from every successive odd knife, starting from the beginning, for example every 3 rd , every 5 th etc.
- the rotational speed of the shaft is synchronised with the rotational speed of the cutter drum with the ratio for which the revolving cleaning edge of the scraper contacts every odd in succession blade of the cutting/comminuting knife.
- the revolving scraper according to the invention allows for continuous removal of the forming buildup during operation of the cutting/comminuting machine for organic plant materials, particularly tobacco materials.
- the working tip of the scraper dives into the contour of the trajectory defined by the knives of the drum so that the amount of the removed buildup is possibly maximal without any collision of the two rotating elements.
- the structure of the scraper allows for advantageous vibrations of the scraper material.
- Figures 1 and 2 show the rotary shaft 4 equipped with the scraper 3, the rotational speed of which is synchronised with the rotational speed of the cutter drum 1 with the ratio for which the revolving cleaning edge of the scraper 3 contacts every odd in succession blade of the cutting/comminuting knife 5.
- the rotational motion of the scraper 3 is transferred from the shaft of the revolving cutter drum 1 via the driving tension member 2 in a form of a belt or a chain, preferable a toothed belt/chain, via an assembly of tensioners 6, 7 to the shaft 4 of the scraper 3.
- n is 16:3, 16:5 or 16:7 so that the scraper 3 removes the buildup from every successive odd knife 5, starting from the beginning, for example every 3 rd , every 5 th etc.
- all the knives 5 and/or their surroundings will be subjected to the operation of the scraper 3.
- the rotary scraper 3 is characteristically configured relative to the cutter drum 1 and its dimensions are beneficially selected so that the rotary tip of the scraper 3 dives into the contour of the trajectory defined by the knives 5 of the cutter drum 1 of the cutting machine so that the amount of the removed buildup is maximal without any collision of the two rotating elements.
- main parameters determining the optimal depth of the penetration into the area external relative to the upper surface of the knife 5 and the external pressing plate 8, are ratios of the working length L of the scraper 3 to the diameter D of the cutter drum 1.
- the scraper 3 is placed on the side of the cutter drum 1 opposite relative to the cutting/comminution zone.
- the geometrical parameters of the scraper 3 are presented in Fig. 4 and they show preferable proportions of the thickness T of the material of the scraper 3 to its working length L.
- the dimensions satisfy the relationship: L T ⁇ e , where e is the base of the natural logarithm.
- the proportion is connected with the functional feature of the scraper 3, the feature being advantageous vibrations of the material of the scraper 3 during its operation.
- the thickness T of the scraper 3 depends on the material the scraper is made from and on the strength parameters of the material, including rigidity against bending forces and stresses generated due to the operation of the scraper 3 (cyclical interaction with the buildup and its removal) and so occurring deflections d, as shown in Fig. 5 .
- the objective of the manner the scraper 3 is mounted, the objective of the type of the material it is made from as well as the objective of the selection of its dimensional proportions is the mechanical removal (scraping) of the buildup which is a mixing of liquids from the cut/comminuted tobacco material with possible admixture of tobacco particles.
- One way of achieving this objective is mounting the scraper 3 in the holder 9 of the rotary shaft 4 such that the vibrations of the material of the scraper 3 are obtained and maintained in the preferable range.
- the scraper 3 is mounted at two points, preferably at three points.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Tobacco Products (AREA)
- Harvester Elements (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
- This invention relates to a scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials.
- Such a device is known from the document
GB-A 662 790 - A knife or a plurality of knives is mounted on the circumferential surface of a rotary cutter drum of a cutting machine, as presented in previous applications to ITM Poland Ltd. During treatment of organic plant materials, particularly tobacco materials, the materials are wetted so that moisture content is appropriate for the organic plant material type and the type of the process/treatment being carried out. Additionally, the organic plant materials, particularly tobacco materials, may be subjected to liquids of much higher density and viscosity than those of water, remaining partially on external surfaces of the processed particles.
- During the cutting/comminuting process of wetted organic plant materials, particularly tobacco materials, the compressing force is applied, keeping the continuously fed material within the cutting zone, as well as the cutting/comminuting forces are applied. Mainly under these forces some of viscous liquids are squeezed out from a portion of the plant material, the liquids, when mixed with particles of the organic plant material dust, particularly tobacco, tending do settle in the nearest neighbourhood of the cutting/comminuting knives. The settling process of the combination of the above mentioned liquids and the dust as tiny particles causes building up a layer which hardens when drying and adversely affects the subsequent cutting/comminuting process.
- Up to now the cleaning operation of surfaces surrounding the revolving knives in the cutter drum for cutting/comminuting organic plant materials; particularly tob acco materials, was performed manually utilising various manual scrapers. In so far produced machines the removal of the buildup was carried out only after stopping the machine, this adversely affecting the quality of the cut/comminuted organic plant material.
- According to the invention, the scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials, is characterised in that the scraper is mounted in a holder of the rotary shaft of the scraper coupled with the cutter drum shaft, the shaft of the scraper and the cutter drum having a common drive.
-
-
- The cutter drum shaft is coupled with the rotary shaft of the scraper via an assembly of tensioners with a driving tension member, which, preferably, has a form of a toothed belt.
- The scraper is located on the side of the cutter drum opposite relative to the cutting/comminution zone.
- Preferably, the holder is mounted on the rotary -shaft at two points.
- Preferably, the holder is mounted on the rotary -shaft at three points.
- The rotational speed n of the shaft of the scraper relative to the rotational speed of the cutter drum of the cutting machine is selected according to the dependency:
- The rotational speed of the shaft is synchronised with the rotational speed of the cutter drum with the ratio for which the revolving cleaning edge of the scraper contacts every odd in succession blade of the cutting/comminuting knife.
- The revolving scraper according to the invention allows for continuous removal of the forming buildup during operation of the cutting/comminuting machine for organic plant materials, particularly tobacco materials.
- Employing the inventive scraper allows for continuous, simple, convenient and reliable removal of the buildup from the blade zone of the cutting/comminuting knife.
- The working tip of the scraper dives into the contour of the trajectory defined by the knives of the drum so that the amount of the removed buildup is possibly maximal without any collision of the two rotating elements.
- The structure of the scraper allows for advantageous vibrations of the scraper material.
- The invention will now be described by way of example only with reference to the accompanying drawing, in which:
-
Fig. 1 is a side view of the scraper according to the present invention, with the shaft being coupled with the cutter drum; -
Fig. 2 shows the device fromFigure 1 in a perspective view; -
Fig. 3 shows the configuration of the scraper relative to the cleaned knife during the cleaning operation; -
Fig. 4 shows geometrical parameters of the scraper according to the invention; and -
Fig. 5 shows deflection of the scraper according to the invention. -
Figures 1 and 2 show the rotary shaft 4 equipped with thescraper 3, the rotational speed of which is synchronised with the rotational speed of the cutter drum 1 with the ratio for which the revolving cleaning edge of thescraper 3 contacts every odd in succession blade of the cutting/comminuting knife 5. The rotational motion of thescraper 3 is transferred from the shaft of the revolving cutter drum 1 via thedriving tension member 2 in a form of a belt or a chain, preferable a toothed belt/chain, via an assembly of tensioners 6, 7 to the shaft 4 of thescraper 3. The rotational speed n of the shaft 4 of thescraper 3 in relation to the rotational speed of the cutter drum 1 of the cutting machine is selected according to the dependency:scraper 3 removes the buildup from every successive odd knife 5, starting from the beginning, for example every 3rd, every 5th etc. Thus after several, for example after 3, 5 etc, revolutions, all the knives 5 and/or their surroundings will be subjected to the operation of thescraper 3. - As shown in
Fig. 3 , therotary scraper 3 is characteristically configured relative to the cutter drum 1 and its dimensions are beneficially selected so that the rotary tip of thescraper 3 dives into the contour of the trajectory defined by the knives 5 of the cutter drum 1 of the cutting machine so that the amount of the removed buildup is maximal without any collision of the two rotating elements. Preferably, main parameters determining the optimal depth of the penetration into the area external relative to the upper surface of the knife 5 and the externalpressing plate 8, are ratios of the working length L of thescraper 3 to the diameter D of the cutter drum 1. - Preferably, the
scraper 3 is placed on the side of the cutter drum 1 opposite relative to the cutting/comminution zone. - The geometrical parameters of the
scraper 3 are presented inFig. 4 and they show preferable proportions of the thickness T of the material of thescraper 3 to its working length L. - Preferably, the dimensions satisfy the relationship:
scraper 3, the feature being advantageous vibrations of the material of thescraper 3 during its operation. The thickness T of thescraper 3 depends on the material the scraper is made from and on the strength parameters of the material, including rigidity against bending forces and stresses generated due to the operation of the scraper 3 (cyclical interaction with the buildup and its removal) and so occurring deflections d, as shown inFig. 5 . -
- The objective of the manner the
scraper 3 is mounted, the objective of the type of the material it is made from as well as the objective of the selection of its dimensional proportions is the mechanical removal (scraping) of the buildup which is a mixing of liquids from the cut/comminuted tobacco material with possible admixture of tobacco particles. One way of achieving this objective is mounting thescraper 3 in the holder 9 of the rotary shaft 4 such that the vibrations of the material of thescraper 3 are obtained and maintained in the preferable range. In the presented solution thescraper 3 is mounted at two points, preferably at three points.
Claims (14)
- A scraper for cleaning surfaces around revolving knives in a cutter drum for culling/comminuting organic plant materials, particularly tobacco materials, characterised in that it is mounted in a holder (9) of a rotary shaft (4) coupled with the shaft of the cutter drum (1), the shaft (4) of the scraper (3) and the drum (1) having a common drive.
- A scraper according to claim 1, characterised in that the shaft of the cutter drum (1) is coupled with the rotary shaft (4) via an assembly of tensioners (6, 7) with a driving tension member (2).
- A scraper according to claim 4, characterised in that the driving tension member (2) has a form of a toothed belt.
- A scraper according to claim 4, characterised in that the driving tension member (2) has a form of a toothed chain.
- A scraper according to claim 1, characterised in that the scraper (3) is placed on the side of the cutter drum (1) opposite relative to the cutting/comminution zone.
- A scraper according to claim 1, characterised in that the holder is mounted on the rotary shaft (4) at two points.
- A scraper according to claim 1, characterised in that the holder (9) is mounted on the rotary shaft (4) at three points.
- A scraper according to claim 1, characterised in that the rotational speed n of the shaft (4) of the scraper (3) relative to the rotational speed of the cutter drum (1) of the cutting machine is selected according to the dependency:
- A scraper according to claim 10, characterised in that the mentioned dependency is 16:3.
- A scraper according to claim 10, characterised in that the mentioned dependency is 16:5.
- A scraper according to claim 10, characterised in that the mentioned dependency is 16:7.
- A scraper according to claim 1, characterised in that the rotational speed of the shaft (4) is synchronised with the rotational speed of the cutter drum (1) with the ratio for which the revolving cleaning edge of the scraper (3) contacts every odd in succession blade of the cutting/comminuting knife (5).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL04820460T PL1703810T3 (en) | 2003-12-11 | 2004-12-06 | Scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL364008A PL207090B1 (en) | 2003-12-11 | 2003-12-11 | Doctor blade for cleaning the surface of vegetable material, and particularly the tobacco, cutting/ disintegrating drum |
PCT/EP2004/053291 WO2005058076A1 (en) | 2003-12-11 | 2004-12-06 | Scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1703810A1 EP1703810A1 (en) | 2006-09-27 |
EP1703810B1 true EP1703810B1 (en) | 2009-02-25 |
Family
ID=34699204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04820460A Not-in-force EP1703810B1 (en) | 2003-12-11 | 2004-12-06 | Scraper for cleaning surfaces around revolving knives in a cutter drum for cutting/comminuting organic plant materials, particularly tobacco materials |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1703810B1 (en) |
AT (1) | ATE423477T1 (en) |
DE (1) | DE602004019690D1 (en) |
MY (1) | MY158854A (en) |
PL (2) | PL207090B1 (en) |
WO (1) | WO2005058076A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113442207B (en) * | 2021-05-21 | 2022-06-24 | 中国联合工程有限公司 | Cleaning device and cleaning method for inner surface and outer surface of circular cutting edge |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB423344A (en) * | 1934-02-02 | 1935-01-30 | Muller J C & Co | Tobacco cutting machine |
GB662790A (en) * | 1949-03-24 | 1951-12-12 | Robert Legg Ltd | Improvements in or relating to machines for cutting leaf tobacco and similar materials |
GB913164A (en) * | 1958-10-03 | 1962-12-19 | Valentine Pearce Harvey | Improvements in knife cleaning devices for rotary tobacco cutting machines |
GB913117A (en) * | 1959-05-13 | 1962-12-19 | Und Eisengiesserei A Heinen G | Improvements in or relating to tobacco cutting machines |
GB1089362A (en) * | 1964-02-18 | 1967-11-01 | Desmond Walter Molins | Improvements concerning tobacco cutting machines |
-
2003
- 2003-12-11 PL PL364008A patent/PL207090B1/en not_active IP Right Cessation
-
2004
- 2004-12-06 PL PL04820460T patent/PL1703810T3/en unknown
- 2004-12-06 AT AT04820460T patent/ATE423477T1/en not_active IP Right Cessation
- 2004-12-06 DE DE602004019690T patent/DE602004019690D1/en active Active
- 2004-12-06 EP EP04820460A patent/EP1703810B1/en not_active Not-in-force
- 2004-12-06 WO PCT/EP2004/053291 patent/WO2005058076A1/en active Application Filing
- 2004-12-09 MY MYPI20045084A patent/MY158854A/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2005058076A1 (en) | 2005-06-30 |
ATE423477T1 (en) | 2009-03-15 |
EP1703810A1 (en) | 2006-09-27 |
PL364008A1 (en) | 2005-06-13 |
PL1703810T3 (en) | 2009-08-31 |
DE602004019690D1 (en) | 2009-04-09 |
MY158854A (en) | 2016-11-15 |
PL207090B1 (en) | 2010-10-29 |
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