US3645457A - Apparatus for depositing comminuted materials upon traveling conveying means - Google Patents

Apparatus for depositing comminuted materials upon traveling conveying means Download PDF

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Publication number
US3645457A
US3645457A US882916A US3645457DA US3645457A US 3645457 A US3645457 A US 3645457A US 882916 A US882916 A US 882916A US 3645457D A US3645457D A US 3645457DA US 3645457 A US3645457 A US 3645457A
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United States
Prior art keywords
chambers
particles
materials
conveying means
air currents
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Expired - Lifetime
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US882916A
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English (en)
Inventor
Berndt Greten
Heinrich Mund
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BAEHRE METALLWERK KG
BAHRE-METALLWERK KG
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BAEHRE METALLWERK KG
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Publication date
Priority claimed from DE19681816212 external-priority patent/DE1816212C/de
Application filed by BAEHRE METALLWERK KG filed Critical BAEHRE METALLWERK KG
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Publication of US3645457A publication Critical patent/US3645457A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres

Definitions

  • the present invention relates to an apparatus for depositing comminuted materials and especially fibrous materials upon traveling conveying means. More particularly the invention relates to improvements in a known type of this apparatus which is provided with at least two depositing or spreading chambers which are located above the conveying means and into which individually adjustable air currents are conducted first in the direction opposite to the direction of travel of the conveying means and thereafter in the direction of travel of the conveying means.
  • each of these chambers is further provided with an opening through which the material after passing over one or more proportioning and feeding devices and over one or more loosening devices is inserted into the respective depositing or spreading chamber. If the quantity of comminuted materials which is to be deposited within a certain period of time is relatively large or if low-grade materials are to be employed which do not require any special treatment before being deposited, additional spreading positions may be provided between the spreading chambers for depositing additional or low-grade materials upon the materials which are already deposited upon the moving conveying means in the preceding spreading chamber.
  • Apparatus of this type as disclosed, for example, by the German Pat. No. 1,061,059, and the German utility Pats. DRGM No. l,950,8 l6, and No. 1,969,309, are employed for producing a continuous layer of chips for the production of chipboards which contain finer chips near their outer surfaces and coarser chips near their central parts.
  • This apparatus was inserted into a chip-layer production line in which at a position subsequent to this apparatus a heated press was provided for simultaneously compressing the deposited layer together with a fibrous covering layer on at least one outer side of the deposited layer.
  • a heated press was provided for simultaneously compressing the deposited layer together with a fibrous covering layer on at least one outer side of the deposited layer.
  • One of these apparatus was provided with fiber-layer producing means which extended parallel to the chip-layer production line, with a conventional cutting device for trimming the edges of the layer and severing it into pieces of a certain length, and behind this cutting device with at least one conveyor for moving the fiber-layer sections either before or subsequent to the chip-spreading station into the chip-layer production line in a direction transverse to the direction of travel of the conveyor of the latter.
  • the apparatus according to the invention is of the general type as at first described herein which is improved by the provision of additional means for comminuting the material which is fed into each of the two spreading or depositing chambers through the inlet opening of this chamber.
  • this depositing apparatus may be supplied with fibrous materials which, even if they contain lumps or the like, will pass in a finely dispersed condition into the spreading chambers.
  • the line and coarser chips which are required for this production may be fed into the spreading chambers in the same manner in which the fibrous materials were fed with the result that the chipboards when finished will have smooth outer sides.
  • the chips and fibers may be fed to the respective comminuting mechanism either together or separately from each other and they will then be intimately mixed with each other or ground by this comminuting mechanism.
  • the new apparatus has among others the important advantage that by grinding the different materials together, which partly may also be chemically treated in different manners, the finished boards will have better physical properties and be of increased solidity.
  • FIG. 11 shows a diagrammatic longitudinal section of a depositing apparatus according to the invention which is provided with two depositing or spreading chambers between which an air-current generator is provided, and in which the comminuted materials are conducted from each chamber to an associated proportioning and feeding mechanism;
  • FIG. 2 shows a diagrammatic longitudinal section of another embodiment of the depositing apparatus according to the invention, in which the materials which are to be deposited in each chamber are supplied by two proportioning and feeding mechanisms; while FIG. 3 shows a diagrammatic longitudinal section of another embodiment of the depositing apparatus according to the invention, in which two additional depositing positions are provided between the two spreading chambers.
  • FlG. ll illustrates an apparatus which comprises two depositing or spreading chambers l and 2 through which a conveyor belt 3 is passed continuously in the longitudinal direction near the bottom of these chambers.
  • the conveying means may also consist of a succession of continuously movable supporting plates and of narrow strips which are loosely placed upon the ends of the adjacent plates so as to cover up the gaps between them.
  • the two chambers l and 2. are separated by a chamber 41 in which a blower 6 is mounted which is adapted to blow air currents through screens, registers or the like in opposite substantially horizontal directions into the chambers l and 2, as indicated by the arrows 7.
  • the chip material 9 before being fed into the two chambers l and 2 is first fed in a conventional manner to two proportioning and feeding mechanisms which in the present case consist of two endless conveyor belts l and rotatable rollers 11, the lowest of which act as doctor rollers which determine the thickness of the layers of the loose material on belts l0 and together with the other rollers tend to return the excess material in the upward direction.
  • two proportioning and feeding mechanisms which in the present case consist of two endless conveyor belts l and rotatable rollers 11, the lowest of which act as doctor rollers which determine the thickness of the layers of the loose material on belts l0 and together with the other rollers tend to return the excess material in the upward direction.
  • a loosening device 12 for example, a pin-studded roller
  • an additional comminuting mechanism 14 for example, in the form of a hammer mill with a screen covering 14, is provided underneath each chute 13.
  • This mechanism further reduces the particle size of the material, also breaks up any possible small lumps, mixes all particles intimately with each other, and passes them in this condition into the two chambers l and 2. Due to this fragmentation which is carried out immediately prior to the spreading process, the internal structure as well as the appearance of the boards to be produced will be considerably improved regardless of the types of materials of which they are made.
  • the directions in which the individual particles are thrown from the comminuting mechanisms 14 are indicated in dotted lines.
  • the finest particles While due to the air currents the finest particles will move substantially along a line f, the coarsest particles will move substantially along the line g so that at first the finest particles will be deposited upon the conveyor belt 3 while traveling in the direction of the arrow 15.
  • the finest particles Upon this lowest layer additional layers of an increasing particle size are successively superimposed in chamber 1, while in chamber 2 this order is reversed and at first the coarsest particles and thereafter increasingly finer particles are deposited on each other.
  • the compound layer 16 is then composed on its upper and lower sides of the finest particles, and its particle size increases gradually and continuously toward its center where the coarsest particles will be located.
  • FIG. 2 illustrates another embodiment of the invention in which the depositing or spreading chambers 1 and 2 are spaced at a greater distance from each other since aside from the proportioning and feeding mechanisms 10, the rollers 11, and the loosening devices 12, this apparatus is provided with additional treating mechanisms which consist of two proportioning and feeding mechanisms 10 which in this case likewise consist of conveyor belts which are movable in the opposite direction to the adjacent conveyor belts 10, and of two rows of rollers 11' each row of which is rotatable in the opposite direction to the rollers 11 of the adjacent row.
  • Chamber 4 is therefore made of a greater length than chamber 4 according to FIG. 1, as seen in the direction of travel of the conveyor belt 3.
  • the size of the blower 5' depends upon the volume of air which is necessary for properly distributing the particles which are to be deposited upon the conveyor belt 3 and upon each other. If the apparatus as illustrated in FIG. 2 is to be employed for producing, for example, chipboards, the material 9 which is to be fed to the two proportioning and feeding mechanisms 10 consists of a normal chip mixture, while the material which is to be fed to the additional proportioning and feeding mechanism 10 consists, for example, of grinding dust or of fibers. These separately fed components are then further broken up into smaller particles and intimately mixed by comminuting mechanisms 14 in the same manner as described with reference to FIG. 1, and are fed into the two outer chambers l and 2.
  • materials of different compositions for example, different kinds of fibrous materials, or fibers and pulverized materials or the like may be supplied to the two sets of proportioning and feeding mechanisms 10 and I0 and then be intimately mixed with each other while passing into the spreading chambers 1 and 2.
  • FIG. 3 The further embodiment of the invention as illustrated in FIG. 3 is similar to that as shown in FIG. 2 insofar as the spreading chambers and their associated elements are concemed.
  • the apparatus according to FIG. 3 is provided with two further spreading positions comprising two chambers 17 each of which is associated with a comminuting mechanism 14 which is supplied with a suitable material 18 through a chute 13.
  • This material 18 may consist of the same or similar components or of different components as those which are supplied to the chambers 1 and 2.
  • a chip material which comes from a sawmill where it is regarded as waste, because it may contain many different types of components which will later form the cores of the boards to be produced and therefore does not have to be of the best quality.
  • an apparatus for depositing comminuted materials first upon conveying means traveling continuously in one direction and then upon each other for the purpose of forming a layer which is adapted to be compressed so as to form chip or fiberboards comprising at least two spreading chambers above said conveying means and having upper inlet openings, means for blowing adjustable air currents in opposite directions above said conveying means and underneath said inlet openings into each of said chambers, and proportioning and feeding means for feeding said materials to at least one loosening device and then through said inlet openings into each of said chambers, the improvement comprising a comminuting mechanism and a screen partly covering the same in each of said chambers underneath said inlet opening for additionally comminuting and intimately mixing said materials and dispersing them into said air currents and through the same before said materials are deposited upon said conveying means and upon each other.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Disintegrating Or Milling (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US882916A 1968-12-20 1969-12-08 Apparatus for depositing comminuted materials upon traveling conveying means Expired - Lifetime US3645457A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681816212 DE1816212C (de) 1968-12-20 Einrichtung zum Streuen von Vliesen aus Teilchen vorzugsweise pflanzlicher Herkunft auf eine Transportvorrichtung

Publications (1)

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US3645457A true US3645457A (en) 1972-02-29

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US882916A Expired - Lifetime US3645457A (en) 1968-12-20 1969-12-08 Apparatus for depositing comminuted materials upon traveling conveying means

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US (1) US3645457A (de)
AT (1) AT291523B (de)
BE (1) BE741230A (de)
FR (1) FR2026625A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4483668A (en) * 1980-09-15 1984-11-20 Bison Werke Bahre & Greten Gmbh & Co. Kg Apparatus for forming multi-layer plate of lignocellulose-containing particles provided with at least one binder
US4627806A (en) * 1985-08-30 1986-12-09 James River-Norwalk, Inc. Apparatus for the manufacture of fibrous webs with helical rotor
WO2000020181A1 (de) * 1998-10-07 2000-04-13 Dieffenbacher Schenck Panel Gmbh Streustation
US6460224B1 (en) * 1998-02-16 2002-10-08 Rolf Hesch Device and method for producing a fiber composite
EP2008783A1 (de) * 2007-06-27 2008-12-31 Dieffenbacher GmbH & Co. KG Verfahren zur Steuerung einer Pressgutmatte im Zuge der Herstellung von Leichtwerkstoffplatten und eine Vorrichtung zur Durchführung des Verfahrens
WO2015091944A3 (en) * 2013-12-20 2015-08-13 Dieffenbacher GmbH Maschinen- und Anlagenbau Method and apparatus for scattering fibers, such as chips
CN111231047A (zh) * 2020-01-21 2020-06-05 淮南市淮森机械设备有限公司 铺装机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2665851A (en) * 1950-05-29 1954-01-12 Chain Belt Co Garbage grinder
US3299478A (en) * 1963-07-09 1967-01-24 Soderhamn Machine Mfg Co Apparatus for forming particle boards

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2665851A (en) * 1950-05-29 1954-01-12 Chain Belt Co Garbage grinder
US3299478A (en) * 1963-07-09 1967-01-24 Soderhamn Machine Mfg Co Apparatus for forming particle boards

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4483668A (en) * 1980-09-15 1984-11-20 Bison Werke Bahre & Greten Gmbh & Co. Kg Apparatus for forming multi-layer plate of lignocellulose-containing particles provided with at least one binder
US4627806A (en) * 1985-08-30 1986-12-09 James River-Norwalk, Inc. Apparatus for the manufacture of fibrous webs with helical rotor
US6460224B1 (en) * 1998-02-16 2002-10-08 Rolf Hesch Device and method for producing a fiber composite
WO2000020181A1 (de) * 1998-10-07 2000-04-13 Dieffenbacher Schenck Panel Gmbh Streustation
EP2008783A1 (de) * 2007-06-27 2008-12-31 Dieffenbacher GmbH & Co. KG Verfahren zur Steuerung einer Pressgutmatte im Zuge der Herstellung von Leichtwerkstoffplatten und eine Vorrichtung zur Durchführung des Verfahrens
WO2015091944A3 (en) * 2013-12-20 2015-08-13 Dieffenbacher GmbH Maschinen- und Anlagenbau Method and apparatus for scattering fibers, such as chips
CN111231047A (zh) * 2020-01-21 2020-06-05 淮南市淮森机械设备有限公司 铺装机
CN111231047B (zh) * 2020-01-21 2022-04-05 淮南市淮森机械设备有限公司 铺装机

Also Published As

Publication number Publication date
AT291523B (de) 1971-07-26
SU361551A3 (de) 1972-12-07
DE1816212A1 (de) 1970-07-16
FR2026625A1 (de) 1970-09-18
BE741230A (de) 1970-04-16

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