US3884294A - Liquid cooled mixing tool for machines for applying glue to shavings - Google Patents

Liquid cooled mixing tool for machines for applying glue to shavings Download PDF

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Publication number
US3884294A
US3884294A US342680A US34268073A US3884294A US 3884294 A US3884294 A US 3884294A US 342680 A US342680 A US 342680A US 34268073 A US34268073 A US 34268073A US 3884294 A US3884294 A US 3884294A
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US
United States
Prior art keywords
legs
shaft
struts
tool
mixing
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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
Application number
US342680A
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English (en)
Inventor
Wilhelm Lodige
Fritz Lodige
Josef Lucke
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19722213778 external-priority patent/DE2213778C3/de
Application filed by Individual filed Critical Individual
Priority to US00342860A priority Critical patent/US3769999A/en
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Publication of US3884294A publication Critical patent/US3884294A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/95—Heating or cooling systems using heated or cooled stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/135—Movable heat exchanger
    • Y10S165/139—Fully rotatable
    • Y10S165/152—Rotating agitator
    • Y10S165/154—Hollow tubing rotates in vessel to stir contents
    • Y10S165/155—Tubing has radially or axially extending sections

Definitions

  • the present invention relates to a liquid cooled mixing tool for machines for applying glue to shavings, f1 bers or similar mixture of wood, bagasse or the like, especially cellulose-containing substances, which tool is arranged on a hollow shaft located centrally in a drumshaped mixing chamber and adapted to supply or withdraw cooling fluid, said mixing tool being adapted with its head portion to rotate at high speed in the vicinity of the wall of the mixing chamber and immersing into the mixing substance.
  • mixing tools are intended to produce relative movements in the mixing zone in the ring of the shaving material between the shavings, whereby the glue drops adhering to the individual shavings are rubbed between the shavings so as to be distributed as uniformly as possible.
  • mixing tools have become known which are formed in the manner of a rod or paddle and are axially arranged in spaced relationship on said hollow shaft.
  • the chips are to be rubbed against each other at a certain pressure so that the glue is wiped uniformly over the surfaces of the shavings.
  • this pressure must not be too high because otherwise the shavings are crushed or diminuted excessively, and the strength values as well as the quality of the pressed plate will be reduced.
  • the shavings are on one hand when backing up in front of the mixing tool and in the gap between the radially outer head end of the mixing tool and the drum wall, pressed unduly so that damage to the shavings and due to the increased friction also increased wear and increased temperature development will be encountered, whereas on the other hand the shavings will in the direction of movement behind the mixing tool and in the axial intermediate chamber toward the adjacent mixing tool merely be whirled around considerably without pressure effect.
  • FIG. 1 is a cross section through a portion of the mixing chamber within the region of the mixing tool.
  • FIG. 2 illustrates a partially sectioned side view of the mixing tool according to the invention.
  • FIG. 3 represents another embodiment of the invention while being illustrated in a manner similar to that of FIG. 2.
  • FIG. 4 illustrates in section the embodiment of FIG. 3, said section being similar to that of FIG. 1.
  • FIG. 5 is a section taken along the line V-V of FIG. 1 and along the line VV of FIG. 4.
  • the mixing tool according to the present invention is characterized primarily in that the mixing tool includes in its head portion at least two legs which are arranged in a V-shaped manner with regard to each other and which with their common tip move ahead and are passed through by cooling liquid, the front of said legs being rounded.
  • the pressed material is by the inclined legs hit at an acute angle so that depending on the circumferential speed adapted to the angular position of the two legs, the shavings are not pressed unduly in a corresponding considerable backup condition.
  • the shavings slide over the rounded forefront of the legs whereby without undue pressure effect a velocity component in a direction transverse to the direction of rotation of the ring of shavings is imparted upon the shavings, which velocity component takes care of a distribution of the shavings having greater glue accumulations thereon 'among the shavings with less glue thereon.
  • a sufficient mixing effect can be realized without the tool ending in its radial outer region directly in front of the wall of the mixing chamber.
  • the flaring ends of the legs are connected to the mixer shaft or to a holding arm extending toward the tip of the legs.
  • This connection is effected by a strut each which in the head portion of the mixing tool are so inclined that their extension is located in front of the axis of the mixer shaft when looking in the direction of rotation of the mixing tool.
  • Pressed material passed from the legs to the interior of the mixing chamber is again plowed up by said struts which impart upon the shaving material in view of the inclination of the struts a velocity component directed toward the wall of the mixing chamber and thus keep the ring of shaving material closed within the region of the mixing chamber wall.
  • a front holding arm deviates portions of the mixing material laterally in the direction toward the rear struts so that the latter will include an increased mixing material proportion.
  • the holding arm and the legs as well as the struts are designed as tubes of round cross section so that independently of the respectively occurring flow direction of the shavings, the latter will at any rate impact upon a rounded surface which prevents an unduly high backing up pressure upon the onflowing mixing material.
  • the line of symmetry of the legs in the plane of the V is adapted to the approximate rounding of the wall of the mixing chamber.
  • a particularly careful treatment of the mixing material during simultaneous reduction in the wear on the mixing chamber is realized by the fact that the tip of the V-shaped leg which runs ahead is closer to the wall of the mixing chamber inasmuch as these legs form their rear ends.
  • the deviating nose when providing a front holding arm, it is of particular advantage to provide a deviating nose at the tip of the V-shaped leg, which nose runs ahead of the holding arm and is filled in its inner chamber by cooling fluid.
  • the deviating nose when the deviating nose is in the manner of a plow equipped with surfaces which throw the material toward the side and toward the interior of the mixing chamber, the deviating nose produces a flow which is inclined toward the interior of the mixing chamber and which hits the holding arm not only or only in its lateral outer regions which already have surface portions located to a major extent in the direction of rotation.
  • the velocity components thus imparted by the deviating nose and the holding arm upon the pressed material transverse to the direction of rotation furthermore bring about that considerable portions of the mixing material will at least twice be intermixed under moderate pressure namely, on one hand, at the deviating nose and/or the holding arm and on the other hand, at the rear range of the legs or at the rear struts.
  • the taking hold of the mixing material by the mixing tool two times has the advantage that behind the central range of the mixing tool there remains no streetwhich is materially cleaned from the mixing material, because the pressed material which is thrown toward the side by the deviating nose and the holding chamber from the intermediate range of the mixing tool, is to a sufficient extend replaced again by the rear ranges so that the natural tendency of the quickly rotating shaving substance ring is aided in forming a plane inner surface.
  • the advantage is obtained that the shaving ring is driven over its axial length in a continuous manner.
  • known tools in contrast thereto do not scan the entire surface of the inner wall of the mixing chamber so that in axial direction gaps occur in which the shaving material is not exposed to any effect exerted by the tools.
  • the shaving material ring must therefore be driven so strongly that it remains maintained in the zones outside the range of the action until the shaving material ring passes into the region of the axially following tools. Therefore, the speed of heretofore known tools is to be selected higher than is necessary for the required wiping pressure with the shaving against shaving friction.
  • the drive of the shaving ring which is substantially uniform over the entire axial length, will prevent that tools arranged at greater distances will at high relative speed and thus while building up a harmful high dynamic pressure, plow through the shaving material in order to maintain the fast rotation of the shaving material ring.
  • the mixing tool according to the present invention thus without pressure peaks and thereby without undue heating up and wear brings about a mixing movement which carefully treats the shaving material, and a mixing movement at speed components with regard to the mixing tool laterally in the direction of the axis of the mixing shaft as well as perpendicular thereto so that in each instance a fast reduction of high glue concentration in the shaving material as well as an intimate intermixture will be assured.
  • FIGS. 1 and 2 the arrange ment shown in FIGS. 1 and 2 comprises a mixer shaft having mounted thereon the mixer tools 11 (one only being shown).
  • the mixer shaft 10 comprises an inner hollow chamber 13 for feeding cooling fluid to the mixing tools 11 and furthermore comprises an annular passage 15 which coaxially surrounds the inner chamber 13 and is separated therefrom by a partition 14. This annular chamber 15 serves for returning the cooling fluid.
  • the mixing tools 11 are, together with the base plate 21, prefabricated, for instance, as a welding construction so as to form a structural unit.
  • the mixer tools 11 have a front holding arm 16 and two rear struts 17 and 18 which at their ends are interconnected by V-shaped legs 19 and 20.
  • the thus designed mixing tools 11 are preferably detachably connected, for instance, by a screw connection to the mixer shaft 10.
  • advantageously intermediate discs 21a of variable thickness are arranged.
  • the cooling fluid passes from the inner hollow chamber 13 through a feeding line 22 which passes from the partition 14 and extends through the annular passage 15.
  • the cooling fluid then passes through the passage 23a in the intermediate disc 21a and through the passage 23 in the base plate 21 into a passage 24.
  • the pas sage 24 is located in the interior of the holding arm 16 and forms the feeding line to the head range of the mixer tool 11.
  • the cooling fluid is, in view of the centrifugal force acting thereupon, conveyed to the tip of the V-shaped legs 19 and 20. From here the cooling fluid passes into cooling passages 25 and 26 (FIG.
  • a nose 30 which runs ahead of the holding arm 16.
  • This nose 30 has an inner hollow chamber 31 for cooling purposes. If, under special conditions of operation, the cooling of the nose 30 by the hollow chamber 31 should prove unsatisfactory, it is possible without difficulties within the region of the central line of legs 19 and 20 to provide an impact plate above the passage 24 in the holding arm 16. This impact plate will force a directed flow of high speed through the hollow chamber 31.
  • the nose 30 is, in the manner of a plow, equipped with surfaces 32 and 33 for throwing the material toward the side and toward the interior of the mixing chamber. As a result thereof, the material is conveyed laterally past the holding arm 16 on the rear ranges of the legs 19 and 20 and the rear struts l7 and 18.
  • the legs 19 and 20, which are rounded in conformity with the curvature of the wall 12 of the mixing chamber, are in the direction of rotation indicated by the arrow 34 at the front, so directed with regard to the wall 12 of the mixing chamber that the nose 30 with its tip and the lateral surfaces 32 and 33 catches the mixing material which is adjacent the wall 12 and lifts said mixing material off the wall 12 without any harmful pressure effect upon the mixing material located between the nose 30 and the wall 12. In this way, an undue wear of the wall 12 within the region of the mixing tool 11 and, in particular, the nose 30 will be avoided.
  • the shaving material is, in view of the inclined surfaces 32 and 33 of nose 30, and in view of the holding arm. 16, conveyed toward the side in the direction toward the rear struts l7 and 18.
  • the mixing material is, at the round surfaces ofthe struts l7 and 19, again deviated toward both sides on one hand to the less mixing material containing chamber behind the nose and the holding arm 16 so that the mixing material which, in the front portion of the mixing tool, is laterally moved out of this region. is replaced, while on the other hand, the mixing material is moved also laterally out of the region of the mixing tool 11.
  • the mixing tools 11 which are axially in spaced relationship to each other arranged on shaft 10 are connected to the mixer shaft 10 in such a way that the respectively laterally adjacent and successive mixing tools 11 can just catch the shaving material which has been laterally moved out of the range of the front mixing tool and can return a portion thereof into the working range of the first mixing tool 11.
  • shaving material is currently moved back and forth between the mixing tools and between the struts 17, 18 and the holding arms 16 so that an equalization of the layer thickness of the shaving material ring occurs and simultaneously a thorough intermixing of the material.
  • the nose 30 by means of its lateral surfaces 32 and 33, in combination with the legs 19 and 20, generates a movement of shaving parts in a direction transverse to the surface of the wall 12 of the mixing chamber, which wall defines the outer contour of the shaving material ring so that also in this direction a fast reduction in glue concentrations, in other words, the desired homogenization of the glue distribution will be assured.
  • FIGS. 3 and 4 in which parts similar to those of FIGS. 1 and 2 have been designated with the same reference numerals as in FIGS. 1 and 2, illustrate a further embodiment of the invention.
  • This embodiment differs from the above described embodiment primarily in that the rear struts 17 and 18 do not extend rectilinearly to the mixer shaft 10 but are at half the height angled off toward the holding arm 16, and similar to the latter, are connected to a stand pipe 35 which connects the mixing tool 11 to the mixer shaft 10.
  • the pipe 35 is, on one hand firmly connected to the ends of the struts 17 and 18 and to the holding arm 16, and on the other hand is, by means of an outer thread screwed into a threaded sleeve 36 which is stationary with regard to the mixer shaft 10.
  • the conveying output or working output of the glue-applying machine can, when employing the mixing tools according to the invention, thus be set merely by the opening pressure of the throttle valve at the outlet opening because, in view of the working operation of the mixing tools according to the invention, care is taken for assuring always a uniform filling height so that a uniform thickness of the rotating ring of shaving material will be assured. If now, for instance, more shaving material with glue applied thereto is withdrawn, the thickness of the ring of shaving material is within the axial range of the withdrawal opening briefly reduced. However, in view of the fast equalization of the fillng height, the withdrawn material is independently of the withdrawing speed immediately replaced by shaving material on the axial inner ranges of the mixing chamber.
  • the filling height in the mixing chamber may also be adjusted by controlling the discharge opening, for instance, flap or sliding weights, by the current consumption of the motor of the device.
  • Such an arrangement is somewhat more expensive than the above described a rrangement.
  • the transfer to the withdrawing opening is aided by the fact that the nose when viewed in the direction of rotation indicated by the arrow 34 points at an incline toward the charging side, as shown in FIG.
  • the shaving material equalizes in view of the fast back and forth movement axially in the mixing chamber to a uniform filling height.
  • a discharge opening which is adapted to be controlled by a throttle valve.
  • the height of filling in the mixing chamber can be adjusted because the mixing tool 11 rotates above the throttle valve and will, depending on tion toward the withdrawal opening is always maintained, and the maximum withdrawal speed is increased further without, however, for instance when the withdrawal opening is closed, a harmful accumulation of shaving material occurs within the axial range of the withdrawal opening. Such harmful accumulation is effectively avoided by the continuous fast back and forth movement of the shaving material and by equalizing the filling height.
  • the present invention is, by no means, limited to the specific showing in the drawings, but also comprises any modifications within the scope of the appended claims.
  • the legs 19 and 20 may be curved in a direction opposite to the direction in which the wall 12 of the mixing chamber is curved, whereby the intermediate and rear ranges of the legs would be brought into the main path of the material which is deviated by the surfaces 32 and 33 and nose 30 and of the holding arm 16.
  • a horizontal shaft rotatable on the axis of the container and having first and second axial passages therein for cooling fluid, and mixing tools carried by the shaft and extending radially therefrom, each tool having a radially outer head portion adjacent the peripheral wall of the container, each head portion comprising at least two tubular legs extending in the peripheral direction and converging toward the leading side of the tool, said legs being interconnected at the leading ends and forming a pointed leading end on the tool, and ineans for conducting cooling fluid from one of said first and second passages in said shaft through said tubular legs and back to the other of said passages, said tool having angularly related support struts connected at the radially inner ends to said shaft and at the radially outer ends to the leading and trailing ends of said legs, said struts being tubular and converging cooling fluid between said first and second passages in said shaft and said tubular legs, said legs and
  • a device in which the leading sides of said legs are rounded, said legs diverging in the trailing direction at an included angle of not more than about and being about equal in length, a radial plane disposed angularly about midway between said legs being perpendicular to the axis of said shaft.
  • a device in which said tool has angularly related support struts connected at the radially inner ends to said shaft and at the radially outer ends to the leading and trailing ends of said legs, said struts being tubular and converging cooling fluid between said first and second passages in said shaft and said tubular legs.
  • said struts include a leading strut connected to said legs near the interconnected leading ends thereof and a pair of trailing struts connected to the legs near the trailing ends thereof, said trailing struts in at least the radially outer regions thereofinclining forwardly from a radius to said shaft in the radially inward direction.
  • a device in which said tool has angularly related support struts connected at the radially inner ends to said shaft and at the radially outer ends to the leading and trailing ends of said legs, said struts being tubular and converging cooling fluid be tween said first and second passages in said shaft and said tubular legs, all of said legs and struts being formed of round pipe.
  • a device in which said legs when viewed in the axial direction of said container curve away from the wall of the peripheral container in the trailing direction.
  • a device in which said legs when viewed in the axial direction of said container are formed so as to be concentric with the peripheral wall of the container.
  • a device which includes a deviating nose member mounted on the leading side of said tool at the juncture of said legs, said member being hollow and cooling fluid supplied to said legs flowing therethrough, said member having side surfaces which converge in the radially inward direction toward said shaft and also in the leading direction of said tool whereby said member has a plow-like action as the tool moves through particles in the container.
  • a device in which said member has an axis of symmetry which extends angularly to the peripheral direction of movement of the tool when viewed in the radial direction whereby to bias material in said container toward one axial end thereof.
  • a device in which said tool has angularly related support struts connected at the radially inner ends to said shaft and at the radially outer ends to the leading and trailing ends of said legs, said struts being tubular and converging cooling fluid between said first and second passages in said shaft and said tubular legs, said legs and struts being fixedly interconnected as by welding.
  • a device in which said tool has angularly related support struts connected at the radially inner ends to said shaft and at the radially outer ends to the leading and trailing ends of said legs, said struts being tubular and converging cooling fluid between said first and second passages in said shaft and said tubular legs, said legs and struts being fixedly interconnected, said struts converging in the radially inward direction toward the shaft, a base plate fixed to the radially inner ends of said struts, and'a further plate excumferential range of an adjacent tool.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Confectionery (AREA)
  • Accessories For Mixers (AREA)
US342680A 1972-03-22 1973-03-19 Liquid cooled mixing tool for machines for applying glue to shavings Expired - Lifetime US3884294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US00342860A US3769999A (en) 1973-03-19 1973-03-19 Liquid separator system and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722213778 DE2213778C3 (de) 1972-03-22 Beleimungsmaschine

Publications (1)

Publication Number Publication Date
US3884294A true US3884294A (en) 1975-05-20

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Application Number Title Priority Date Filing Date
US342680A Expired - Lifetime US3884294A (en) 1972-03-22 1973-03-19 Liquid cooled mixing tool for machines for applying glue to shavings

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US (1) US3884294A (es)
AT (1) AT328710B (es)
BE (1) BE796467A (es)
CA (1) CA973541A (es)
ES (1) ES189859Y (es)
FR (1) FR2176711B3 (es)
GB (1) GB1402370A (es)
IT (1) IT981484B (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395132A (en) * 1979-12-28 1983-07-26 Constructie Werkhuizen Vandekerckhove N.V. Stirring gear with internal heating
US4658890A (en) * 1984-04-17 1987-04-21 Saga University Rotary blade type fluid condenser
US4941749A (en) * 1987-12-29 1990-07-17 Societe Anonyme: Moritz Hub for an agitator having hollow blades and an internal heat-conveying fluid flow circuit
US4941750A (en) * 1987-12-30 1990-07-17 Societe Anonyme: Moritz Moving agitator member for apparatus for mixing substances in powder, paste, or granular form
US9321190B2 (en) * 2012-10-24 2016-04-26 Phoenix Innovation Technology Inc. Temperature-controlled thermokinetic mixer
US11039629B2 (en) * 2017-02-15 2021-06-22 Wenger Manufacturing Inc. High thermal transfer hollow core extrusion screw assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2802876A1 (de) * 1978-01-24 1979-07-26 Loedige Maschbau Gmbh Geb Mischwerk fuer mischmaschinen
DE3641952A1 (de) * 1986-12-09 1988-06-23 Schenk Filterbau Gmbh Prozessfilter
JP2585867B2 (ja) * 1989-10-24 1997-02-26 ゲブリューダー レーディゲ マシネンバウ ゲー・エム・ベー・ハー 固体粒子を動かす装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1250435A (en) * 1917-01-22 1917-12-18 Frank A Connolly Mixing and cooling machine.
US2504033A (en) * 1947-11-06 1950-04-11 Acme Coppersmithing & Machine Apparatus for crystallization and the like
US2594142A (en) * 1947-07-15 1952-04-22 Henry H Feldstein Crystallizing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1250435A (en) * 1917-01-22 1917-12-18 Frank A Connolly Mixing and cooling machine.
US2594142A (en) * 1947-07-15 1952-04-22 Henry H Feldstein Crystallizing apparatus
US2504033A (en) * 1947-11-06 1950-04-11 Acme Coppersmithing & Machine Apparatus for crystallization and the like

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395132A (en) * 1979-12-28 1983-07-26 Constructie Werkhuizen Vandekerckhove N.V. Stirring gear with internal heating
US4658890A (en) * 1984-04-17 1987-04-21 Saga University Rotary blade type fluid condenser
US4941749A (en) * 1987-12-29 1990-07-17 Societe Anonyme: Moritz Hub for an agitator having hollow blades and an internal heat-conveying fluid flow circuit
US4941750A (en) * 1987-12-30 1990-07-17 Societe Anonyme: Moritz Moving agitator member for apparatus for mixing substances in powder, paste, or granular form
US9321190B2 (en) * 2012-10-24 2016-04-26 Phoenix Innovation Technology Inc. Temperature-controlled thermokinetic mixer
US11039629B2 (en) * 2017-02-15 2021-06-22 Wenger Manufacturing Inc. High thermal transfer hollow core extrusion screw assembly

Also Published As

Publication number Publication date
FR2176711A1 (es) 1973-11-02
DE2213778B2 (de) 1977-05-26
ES189859Y (es) 1974-10-16
IT981484B (it) 1974-10-10
AT328710B (de) 1976-04-12
ES189859U (es) 1974-05-01
FR2176711B3 (es) 1976-03-05
GB1402370A (en) 1975-08-06
ATA194473A (de) 1975-06-15
DE2213778A1 (de) 1973-09-27
BE796467A (fr) 1973-07-02
CA973541A (en) 1975-08-26

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