EP0670752A1 - Dispositif de revetement de corps solides de petites dimensions - Google Patents

Dispositif de revetement de corps solides de petites dimensions

Info

Publication number
EP0670752A1
EP0670752A1 EP94926825A EP94926825A EP0670752A1 EP 0670752 A1 EP0670752 A1 EP 0670752A1 EP 94926825 A EP94926825 A EP 94926825A EP 94926825 A EP94926825 A EP 94926825A EP 0670752 A1 EP0670752 A1 EP 0670752A1
Authority
EP
European Patent Office
Prior art keywords
feed pipe
turbine
feed
turbine body
heating
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Withdrawn
Application number
EP94926825A
Other languages
German (de)
English (en)
Inventor
Axel König
Mathias Kleinhans
Janéz MIHELIC
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Santrade Ltd
Original Assignee
Santrade Ltd
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 Santrade Ltd filed Critical Santrade Ltd
Publication of EP0670752A1 publication Critical patent/EP0670752A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/025Rotational joints
    • B05B3/026Rotational joints the fluid passing axially from one joint element to another
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/70Spray-mixers, e.g. for mixing intersecting sheets of material
    • B01F25/74Spray-mixers, e.g. for mixing intersecting sheets of material with rotating parts, e.g. discs
    • B01F25/743Spray-mixers, e.g. for mixing intersecting sheets of material with rotating parts, e.g. discs the material being fed on both sides of a part rotating about a vertical axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/001Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements incorporating means for heating or cooling, e.g. the material to be sprayed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/08Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements in association with stationary outlet or deflecting elements
    • B05B3/082Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements in association with stationary outlet or deflecting elements the spraying being effected by centrifugal forces
    • B05B3/085Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements in association with stationary outlet or deflecting elements the spraying being effected by centrifugal forces in association with sectorial deflectors

Definitions

  • the invention relates to a device for coating small solid bodies with a layer which is obtained from a liquid phase and solidifies, in which the solid bodies and the liquid are axially fed from one side to a rotating disk-like turbine, which is driven by a rotary valve Input side facing away from the projecting drive shaft is rotated.
  • the known device does not provide any possibility of tempering the turbine itself. However, since it may be important to heat the melt exactly before it leaves the draw gap, because this can influence its viscosity properties, it is not always easy with the known devices to maintain and maintain the desired melt temperature in the turbine to be able to.
  • the turbine rotates in a housing in which the bearing for the turbine shaft is also located.
  • the gap between the housing and the rotating turbine has a connection to the storage room.
  • the seal provided there is not sufficient in all cases to prevent product, in particular also a liquid type, from accumulating on the edge of the housing radially outside the turbine from settling down into the bearings.
  • the invention is therefore based on the object of designing a device of the type mentioned at the outset in such a way that an exact temperature control of the rotating turbine is possible in order to allow the coating process to proceed in a defined manner.
  • the invention consists in the turbine body being heatable in a controlled manner through the drive shaft. This configuration makes the desired temperature control possible at the point at which it is important for the coating process.
  • the drive shaft can be designed as a hollow shaft, in which the supply and return lines for a heating medium are laid, which are circulated in heating channels evenly laid in the turbine body.
  • these heating channels run in a star shape from the axis of rotation of the turbine body outwards and back to the center, and a co-rotating feed pipe for a heating medium is guided in the hollow shaft so that the supply of the heating medium to the turbine body, while the return of the heating medium takes place through the gap formed in the hollow shaft and surrounding the feed pipe.
  • This configuration allows a heating medium to be supplied and removed in a simple manner.
  • the co-rotating feed pipe is opposite the se is sealed.
  • the feed pipe is also guided on the inside on a fixed pipe socket and is also sealed off from this by a labyrinth seal. It has been shown that a particularly good seal is achieved in this way, even though the feed pipe rotates with the turbine.
  • the medium is then returned from the hollow tube which is open at the bottom and from the gap between the feed tube and out of this into a drainage space.
  • a supply of the liquid is designed for reasons of space so that an initially axially feeding pipe to the turbine is still angled radially outwards within the likewise axial solids supply is then a roof-shaped shield is applied over the radial part of the feed in order to prevent undesired heating of the solid particles from the feed pipe for the liquid product - the melt - which is designed as a heated double pipe.
  • a fixed, radially protruding knife can be attached to the double-walled feed pipe, the material that wants to settle on the upper edge of the rotating turbine at the feed point when the turbine rotates constantly removed.
  • FIG. 1 shows a schematic longitudinal section through a device for coating solid bodies according to the invention
  • 2 shows a somewhat enlarged illustration of the section through the device of FIG. 1 along the section line II-II,
  • FIG. 3 is an enlarged view of the upper part of the device of FIG. 1,
  • Fig. 5 is a view of part of Fig. 3 in the direction of arrow V, and
  • FIG. 6 shows the enlarged representation of the seal of the supply pipe for the heating medium of the device of FIG. 1.
  • the device according to FIG. 1 shows a device which is used to coat small solid particles with a layer obtained from a liquid phase, which then solidifies.
  • the device according to FIG. 1 consists of an approximately cylindrical housing (1) made up of several parts, which in the exemplary embodiment consists of four essentially ring-shaped parts (la, lb, lc and ld). This structure is chosen for assembly reasons.
  • the housing ring (lb) contains two bearings (2) for a hollow shaft (4) which is additionally supported by a bearing (2) which is arranged on a bearing ring (3) inserted between the housing rings (lc and ld).
  • the hollow shaft (4) is firmly connected at its upper end to a turbine body (5) which is rotatably inserted in the housing ring (la).
  • the turbine body consists of the lower part (5a) which is fixedly connected to the hollow shaft (4) and which is screwed to an upper part (5b) with a smaller diameter.
  • the housing part (la) is closed at the top by an end ring (6) and a cover (7), both of which have a central opening (8) through which from above solid particles supplied through a funnel (9) in the direction of the arrow (10) can reach the surface of the turbine part (5b).
  • This part (5b) is provided with radially extending turbine blades, which are not shown in detail, in a known manner.
  • the solid particles which, for example, have the shape of small, uniform grains, are conveyed radially outward by the turbine part (5b) as it rotates into an encircling annular space (11), which can be better seen in FIG. 3. From this annular space (11), the solid particles entrained by the rotation of the turbine body (5) are then removed in the direction of arrow (13) from an opening (12) leading tangentially or radially out of the annular space (11) to go through a cooling section.
  • the part (5b) of the nozzle body (5) has an interior (14) in which a feed tube (15) is provided from above for the second material used to coat the solid particles, which is in the liquid Phase is supplied as a melt. Since this material should be solidified at room temperature and form the layer around the individual solid particles, this material is supplied in a heated, molten state.
  • the feed pipe (15) is surrounded by a heating jacket (16).
  • the liquid product supplied in the direction of the arrow (17) is therefore surrounded by a heating liquid which is supplied in the direction of the arrow (18) into the space of the casing (16) and is led out again through the pipe (19).
  • the fixed tube (15) is held at the lower end in a feed pipe (20) which is sealed with a labyrinth seal against a raised collar (21) (Fig. 3) of the turbine part (5b).
  • the liquid supplied in the direction of the arrow (17) reaches the interior (14) via this feed connector (20) and from there, due to the centrifugal forces imposed on it by the rotation, it can flow radially through the Bores (22) arranged in part (5b) enter an annular slot (23) which in turn opens into the annular space (11).
  • the annular space (11) there are therefore not only the solid particles during operation, but also a mist formed by the rotation and formed from the liquid phase. During the rotation within the space (11), the solid particles are therefore coated in the desired manner with a layer made of the liquid material that can then solidify.
  • the part (5a) of the turbine body (5) is provided with channels (24) extending radially from a central space, which channels in the circuit (25) are guided, which lead into the interior (26) of the hollow shaft (4).
  • this hollow shaft (4) there is also a co-rotating feed pipe (27) fastened to the part (5a) (see also FIG. 2), which is held in this coaxial position by means of distance locks (28), which, however, are so ⁇ create that they form passages for the heating medium flowing back in space (26), which is introduced in the direction of arrow (29) from below into the feed pipe (27).
  • This heating medium leaves the arrangement after flowing through the heating channels (24 and 25) in part (5a) through the cavity (26) and arrives in a collecting space (30) within the housing ring (ld) and from there in the direction of the arrow (31) be discharged to the outside.
  • FIG. 1 shows that the hollow shaft (4) is provided with a pinion (32) on which a toothed belt (33) for driving the hollow shaft (4) and the turbine body (5) rests.
  • Fig. 6 shows that for this purpose the lower end cover (34) is provided with a fixed connection piece, which in a fixed pipe socket (36) passes into the interior of the connecting pipe (27).
  • this connecting pipe (36) is provided on its outside with a labyrinth seal (37) which interacts with the lower end of the connecting pipe (27).
  • Fig. 6 also shows that the outside of the lower end of the connecting pipe (27) itself is in turn provided with a labyrinth seal (38) which interacts with a fixed sealing sleeve (39) which is connected to the cover () by a flange (40). 34) is screwed.
  • This configuration enables a particularly good seal to be achieved for the heating medium supplied, although both the hollow shaft (4) and the feed pipe (27) guided coaxially therein rotate. A significant loss of heating medium cannot occur. Any leaks enter the room (30) and can be removed from there.
  • FIGS. 4 and 5, together with FIGS. 1 and 3, also show that the feed pipe (15) or its heating jacket (16) is secured by a protective jacket (40) against the solid particles fed axially from above to the turbine body (5) are the roof-shaped upwards against the feed direction according to the arrow (10).
  • This cover (40) thus insulates the hot jacket (16) from the outside and thus prevents the supplied solid particle product from attaching itself to the heating jacket (16) and melting in an undesirable manner.
  • a fixed knife (41) in the form of radially protruding knife tips is provided, which is opposite the top of the collar (21) which rotates are relatively moved.
  • These knife tips (41) therefore help to ensure that no product residues settle on the top of the collar, which could possibly hinder further function.
  • the decisive factor for the new device is the ability to heat the turbine body (5) directly and in a controlled manner. This can be done by regulating the liquid heating medium supplied in the sense of the arrow (29) to a certain temperature. This presents no difficulties if the heating medium is circulated. It is also possible at any time to change the temperature and adapt it to the coating process if this should be necessary.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Glanulating (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Medicinal Preparation (AREA)

Abstract

L'invention concerne un dispositif de revêtement de corps solides de petites dimensions. La température des turbines rotatives utilisées pour projeter vers l'extérieur la phase liquide de revêtement de corps solides ne convient pas dans l'état actuel de la technique pour tempérer ce liquide. Afin de tempérer la turbine directement dans la zone où se trouve le liquide à distribuer, le corps (5) de la turbine est alimenté en un milieu de chauffage en circulation qui s'écoule à travers un arbre creux (4) d'entraînement de la turbine. L'invention est utile dans des dispositifs de revêtement.
EP94926825A 1993-09-10 1994-08-05 Dispositif de revetement de corps solides de petites dimensions Withdrawn EP0670752A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4330633 1993-09-10
DE4330633A DE4330633C1 (de) 1993-09-10 1993-09-10 Vorrichtung zum Überziehen kleiner Festkörper
PCT/EP1994/002609 WO1995007136A1 (fr) 1993-09-10 1994-08-05 Dispositif de revetement de corps solides de petites dimensions

Publications (1)

Publication Number Publication Date
EP0670752A1 true EP0670752A1 (fr) 1995-09-13

Family

ID=6497309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94926825A Withdrawn EP0670752A1 (fr) 1993-09-10 1994-08-05 Dispositif de revetement de corps solides de petites dimensions

Country Status (9)

Country Link
US (1) US5593501A (fr)
EP (1) EP0670752A1 (fr)
JP (1) JPH08501730A (fr)
KR (1) KR950704032A (fr)
CN (1) CN1114497A (fr)
AU (1) AU670214B2 (fr)
CA (1) CA2147132A1 (fr)
DE (1) DE4330633C1 (fr)
WO (1) WO1995007136A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4330632C1 (de) * 1993-09-10 1995-02-09 Santrade Ltd Vorrichtung zum Überziehen von Festkörperpartikeln
CN101091888B (zh) * 2007-05-15 2010-05-19 刘廷国 橡胶沥青生产设备的沥青与橡胶粉混合器
CH714354A2 (de) * 2017-11-17 2019-05-31 Mvt Micro Verschleiss Technik Ag Düsenvorrichtung für ein Fluid, Verfahren zur Herstellung einer Düsenvorrichtung sowie Kit, umfassend einen Rotor und eine Hohlnadel für eine Düsenvorrichtung.
CN108447793B (zh) * 2018-05-21 2019-11-29 汤美侠 一种二极管引线封胶工艺

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944284A (en) * 1957-10-09 1960-07-12 United States Gypsum Co Binder distribution and atomizing system for fiberizing apparatus
US3006499A (en) * 1959-07-31 1961-10-31 Gen Dynamics Corp Safety means for tank caps
US3409712A (en) * 1966-07-22 1968-11-05 Dow Chemical Co Method of devolatilization of synthetic resinous thermoplastic materials
DE2938795C2 (de) * 1979-09-25 1981-06-19 Werner 7851 Binzen Glatt Dragiervorrichtung
EP0048312A1 (fr) * 1980-09-19 1982-03-31 Nemo Ivarson Procédé et dispositif de mélange continu d'un liquide avec une poudre
DE3146824C2 (de) * 1981-11-26 1999-09-02 Reutter Metallwaren "Verschlußdeckel, insbesondere für einen Kraftstofftank"
SE455672B (sv) * 1985-02-04 1988-08-01 Lejus Medical Ab Forfarande for overdragning av fasta patiklar med en smelta

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9507136A1 *

Also Published As

Publication number Publication date
WO1995007136A1 (fr) 1995-03-16
CA2147132A1 (fr) 1995-03-16
KR950704032A (ko) 1995-11-17
JPH08501730A (ja) 1996-02-27
CN1114497A (zh) 1996-01-03
DE4330633C1 (de) 1995-04-13
AU7652694A (en) 1995-03-27
AU670214B2 (en) 1996-07-04
US5593501A (en) 1997-01-14

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