EP1875215A1 - Method and device for detecting cutting qualities - Google Patents
Method and device for detecting cutting qualitiesInfo
- Publication number
- EP1875215A1 EP1875215A1 EP06707423A EP06707423A EP1875215A1 EP 1875215 A1 EP1875215 A1 EP 1875215A1 EP 06707423 A EP06707423 A EP 06707423A EP 06707423 A EP06707423 A EP 06707423A EP 1875215 A1 EP1875215 A1 EP 1875215A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chips
- pressing
- pressure
- conveyor
- zone
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
- B07C5/3425—Sorting according to other particular properties according to optical properties, e.g. colour of granular material, e.g. ore particles, grain
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/898—Irregularities in textured or patterned surfaces, e.g. textiles, wood
- G01N21/8986—Wood
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8411—Application to online plant, process monitoring
- G01N2021/8416—Application to online plant, process monitoring and process controlling, not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/845—Objects on a conveyor
Definitions
- the invention relates to the field of properties of chips. In particular, it relates to detecting the thickness of wood shavings as produced in wood chippers.
- the chip thickness is a very important factor for the quality of chipboard. It should be within certain tolerances to create a quality of the plates to be produced therefrom.
- the chip thickness is also important as an indication of the condition of a Zerspaners, with which the chips are made. If the chips become thicker in the course of the service life of a chipper and exceed a certain level, this may mean that certain components of the chipper are worn and need to be replaced. This applies, for example, wear plates of a Zerspaners with integrated chip removal slot. Also, a higher proportion of fines may indicate blunt knives.
- Time intervals are made.
- the chips were measured individually only after drying.
- the procedure is a manual one. It is extremely time consuming. It indicates the mechanical condition of the chipper and its elements much too late, d. H. at a time when a large amount of chips has already been produced, namely chips that no longer meet the requirements.
- the detection of the cutting properties is therefore too late, and thus the ability to correct an undesirable condition of the chipper.
- the invention has for its object to provide a method and an apparatus, which quickly, reliably and inexpensively properties of Chips made of wood or other material can be seen continuously during the operation of the chipper.
- the basic sequence of a method according to the invention consists in the following: first, the chips, which are produced by a chipper, from a
- the chip stream can be diverted as a partial stream of a constantly generated total current of chips.
- Partial flow is then fed to a device in which the chips are separated. Then, the chips are fed to a conveyor, comprising a moving base with a support surface for receiving the individual chips.
- the chips are then guided on their conveying path through a pressing zone, which has an inspection device for detecting the cutting properties of interest.
- Figure 1 shows a first system for detecting properties of
- Figure 2 shows a second system
- Figure 3 shows a detail of a third plant
- Figure 4 shows a detail of a fourth plant
- Figure 5 shows a detail of a fifth plant
- FIG. 6 shows a detail of a sixth plant.
- the system shown in Figure 1 is used to detect the thickness of chips.
- the chips coming from a chipper are first fed to a feed device 1.
- a device 2 for separating the chips This device is followed by a conveyor 3.
- the conveyor 3 comprises a conveyor belt 3.1, which wraps around rollers 3.2 and 3.3.
- One of the two rollers is a drive roller.
- the conveyor 3 is associated with a pressing device 4.
- This comprises a pressure belt 4.1, which forms a closed loop.
- the pressure belt wraps around guide rollers 4.2, 4.3, 4.4 and 4.5.
- the guide rollers 4.4 and 4.5 and thus the
- Pressing band 1 can be pressed down by springs, in the direction of the conveyor belt 3.1.
- An inspection device 5 is located within the loop of the pressure belt 4.1.
- This comprises an illumination device 5.1, for example a laser device, furthermore a camera 5.2, for example a 2D camera or a 3D camera.
- the conveyor 3 is a collecting channel 6 downstream.
- the shavings separated in the separating device 2 fall onto the supporting surface of the conveyor belt 3.1. They are conveyed in the direction of the horizontal arrow from left to right.
- an orientation of the chips in the conveying direction is achieved here, which may be desirable.
- the orientation can be favored by appropriate speed of the conveyor belt 3.1. From the lying on the conveyor chips are not always stretched straight, with In other words, they are not always parallel to the wing. They may be slightly arched or bent, in the manner of a roll or a curl or a spiral.
- the pressing belt 4.1 may consist of a transparent film or of any other material which is permeable to the rays of the illumination device 5.1.
- the inspection device 5 which is located within the closed loop of the pressure belt 4.1, operates according to the present case for an optical measuring system, for. B. according to the sectional image method.
- the principle of two-dimensional laser triangulation provides image data continuously and cell by cell, which also contain information about the height measured at the respective pixel.
- the image data are combined in the computer to form an image information, to which then the known algorithms of digital image processing for the determination of object contours can be applied.
- the contour parameters determined per particle are statically evaluated and graphically displayed. Couplings to the process, eg. B. transfer of parameters to a host, are possible. This makes it possible to directly influence the automatic grinding and knife setting machines.
- a surface determination is possible in addition to the chip thickness, so that over the size parameters, length, Width, thickness, area, volume, slenderness, width ratio, statistically all needs for the wood material production can be determined.
- Pressing 4 This has instead of the pressure belt with the guide rollers now a hollow cylinder with bearing rollers 4.7, 4.8.
- the cylinder may also be cantilevered.
- the pressing zone over which the hollow cylinder 4.6 is pressed against the chips and thus against the conveyor belt 3.1 is - in the direction of movement of the conveyor belt 3.1 - much shorter than in the system of Figure 1.
- the hollow cylinder 4.1 can also have a sufficiently large iron weight, so that the provision of a special pressing means is unnecessary.
- Hollow cylinder 4.1 can also be cantilevered.
- the pressure belt 4.1 may be provided with its own drive, and in the system shown in Figure 2, the hollow cylinder 4.6 may be provided with its own drive.
- Andschreibband 4.1 or hollow cylinder 4.6 but also have a rotational speed or peripheral speed, which differs from the rotational speed of the conveyor belt 3.1. Namely, is the peripheral or peripheral speed of Andschreibband 4.1 or hollow cylinder 4.6 is slightly larger than the
- Circulation speed of the conveyor belt 3.1 this may have a favorable effect in terms of orientation of the chips.
- FIG. 3 illustrates a detail of another embodiment of a plant according to the invention.
- a circulating pressing belt 4.1 is provided.
- guide rollers 4.1, 4.2, 4.3 By appropriate configuration of guide rollers 4.1, 4.2, 4.3, however, a wedge-shaped inlet gap between the conveyor belt 3.1 and pressure belt 4.1 is formed, which causes a smooth deformation of the chips.
- the conveyor belt 3.1 slides over a sliding body 3.4.
- the slider 3.4 has a convex bearing surface 3.4.1. Since a certain train in the longitudinal direction is applied to the pressure belt 4.1 and the conveyor belt 3.1, a pressing of the pressure belt 4.1 takes place against the chips and thus against the conveyor belt 3.1 instead. This gentle pressure causes the chips to lie flat.
- the vertical arrows illustrate a negative pressure which has the same effect as the pressure according to FIG.
- conveyor belt 3.1 and pressure belt 4.1 or at least one of these belts can be perforated.
- any pressing devices it may be necessary neither the pressing belt 4.1 nor the hollow cylinder 4.1. Instead, it could be thought to bring the chips to lie flat in other ways, for example, by being applied to a conveyor belt or another, and brought by pressure or vacuum to lie flat.
- pressure-blowing air could be directed from above against the chips lying on the base, for example in the form of an air film or air curtain.
- the pad In the second case, the pad could be perforated and vacuumed from below.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510019986 DE102005019986A1 (en) | 2005-04-27 | 2005-04-27 | Chip e.g. wood chip, characteristics e.g. thickness, measuring method for use in chip board, involves measuring chip characteristics in compression area by inspection unit that includes laser unit and/or camera |
PCT/EP2006/001999 WO2006114151A1 (en) | 2005-04-27 | 2006-03-04 | Method and device for detecting cutting qualities |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1875215A1 true EP1875215A1 (en) | 2008-01-09 |
Family
ID=36337630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06707423A Withdrawn EP1875215A1 (en) | 2005-04-27 | 2006-03-04 | Method and device for detecting cutting qualities |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1875215A1 (en) |
DE (1) | DE102005019986A1 (en) |
WO (1) | WO2006114151A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020005697A1 (en) | 2020-04-25 | 2021-10-28 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Process for the production of material panels from chipboard and material panel |
DE102020005696A1 (en) | 2020-04-25 | 2021-10-28 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Method and device for the production of material panels from chipboard |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19510008C2 (en) * | 1995-03-23 | 1997-01-30 | Siemens Ag | Process and device for process control in pulp and / or paper production |
CA2228023A1 (en) * | 1998-01-23 | 1999-07-23 | Centre De Recherche Industrielle Du Quebec | Method and apparatus for classifying batches of wood chips or the like |
FI110545B (en) * | 1998-10-28 | 2003-02-14 | Valtion Teknillinen | Method and arrangement for measuring wood material |
CA2258982A1 (en) * | 1999-01-27 | 2000-07-27 | Real Frenette | Chip analyser |
-
2005
- 2005-04-27 DE DE200510019986 patent/DE102005019986A1/en not_active Withdrawn
-
2006
- 2006-03-04 EP EP06707423A patent/EP1875215A1/en not_active Withdrawn
- 2006-03-04 WO PCT/EP2006/001999 patent/WO2006114151A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2006114151A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102005019986A1 (en) | 2006-11-02 |
WO2006114151A1 (en) | 2006-11-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20071030 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE ES FR GB GR IT |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: B. MAIER ZERKLEINERUNGSTECHNIK GMBH Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN |
|
17Q | First examination report despatched |
Effective date: 20080228 |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): BE ES FR GB GR IT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20151001 |