US3348318A - Drying equipment - Google Patents

Drying equipment Download PDF

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Publication number
US3348318A
US3348318A US488898A US48889865A US3348318A US 3348318 A US3348318 A US 3348318A US 488898 A US488898 A US 488898A US 48889865 A US48889865 A US 48889865A US 3348318 A US3348318 A US 3348318A
Authority
US
United States
Prior art keywords
nozzles
air
drying
aggregate
chamber
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.)
Expired - Lifetime
Application number
US488898A
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English (en)
Inventor
Norlyng Kristian Himmelstrup
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.)
BING AND GRONDAHLS PORCELLAENSFABRIK AS
Original Assignee
BING AND GRONDAHLS PORCELLAENSFABRIK AS
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 BING AND GRONDAHLS PORCELLAENSFABRIK AS filed Critical BING AND GRONDAHLS PORCELLAENSFABRIK AS
Application granted granted Critical
Publication of US3348318A publication Critical patent/US3348318A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
    • F26B21/50—Ducting arrangements from the source of air or other gases to the materials or objects being dried

Definitions

  • This invention is concerned with a method and an equipment for the predrying of ceramic bodies by means of hot air, preferably moderately heated air, and has for its object to describe a method and an equipment by which it is possible to obtain a rapid and effective predrying without the risk that such rapid drying should cause disadvantages, such as deformation or cracking of the ceramic bodies.
  • Drying equipments of this kind are used for instance in the porcelain industry where pre-shaped soft plastic bodies have to be pre-dried and where a rapid pre-drying is of the greatest importance due to the fact that thereby it is possible to obtain that the normally used plaster moulds will be ready for re-use relatively quickly. It has to be mentioned that the predrying necessarily must take place while the bodies are supported on these moulds.
  • the pre-dried bodies may be removed from the plaster mould and the drying process may be continued in any convenient manner.
  • a drying equipment which for each object to be dried has a nozzle aggregate with a number of elongated tube-shaped nozzles extending from the bottom of an air pressured chamber, the nozzles being positioned substantially mutually parallel and in such a manner that the stream of air formed by all the nozzles together will have a sectional shape which is substantially the same as a plane vertical projection of the body and coinciding therewith.
  • FIGURE 1 a side view of a drying equipment in accordance with the invention, the casing being partly cut away in order to show the interior arrangements and FIGURE 2 showing a side view and partial vertical cross-section of a nozzle aggregate from such equipment.
  • FIG. 1 a drying equipment consisting of a casing 1 surrounding a transportating system by which a chain 2 running over wheels 3 is carrying a number of swing carriers 4 each carrying a plaster mould 5. It will be observed that on each of the plaster moulds carried by the swing carrier on the left hand and the upper part of the chain a plate or saucer 6 is placed.
  • the casing is provided with an opening 7 through which the saucers might be romevd from the mould and consequently the swing carriers on the right hand part of the chain has no saucers placed thereon.
  • the removing of the saucers and the replacement of the moulds with other moulds on which plates or saucers are placed do not belong to the invention and is therefore not further described.
  • nozzle aggregate 8 At the horizontal parts of the chains there are in the casing provided a number of nozzle aggregate 8 and such a nozzle aggregate is shown in FIG. 2 in a larger scale and shall be further explained below.
  • FIG. 2 a part of a supporting plate 9, of a swing carrier and on this supporting plate is shown a plaster mould 5 on which again a saucer 6 is placed.
  • the nozzle aggregate 8 is positioned and it consists of a flat air chamber 10 having an air supply tube 11 for moderately preheated drying air under a certain pressure.
  • a number of elongated tube-shaped air nozzles 12 are attached to the bottom of said chamber so that the dlying air might be let through these nozzles against the plate 6 and thereby cause an accelerated predrying.
  • the elongated nozzles 6 are intended for imposing to the air a considerable velocity and simultaneously allow the drying air which has already contacted the upward surface of the plate 6 to escape upwardly between the nozzles 12.
  • the number of nozzles, the distribution thereof, the distance between adjacent nozzles, the diameter of each nozzle as well as the velocity of the air, may be varied in regard to the size and shape of the object to be dried.
  • the nozzle aggregate may also be used in different manners. It is, for instance, possible to move the object to be dried stepwise so that in a certain period it is standing coaxially with one aggregate and during the next step it will stand below another aggregate. It is also possible to let the moulds with the objects move continuously when simultaneously the nozzle aggregate is adapted to follow the moulds along a considerable distance of the movement of the moulds. Further, the mould as well as the nozzle aggregate could be stationary during the whole predrying period thus remaining in their mutual coaxial position.
  • the big number of nozzles will of course cause a drying in spots but the spots will be placed so close to one another that they are merging during the continuation of the drying process so that for instance a saucer or a plate will obtain very uniform drying conditions.
  • the tensions which are caused during the drying process due to the shrinkage of the object will be distributed with very small tension gradients notwithstanding the rather rapid drying.
  • the drying air has released its contents of heat and has absorbed an amount of moisture it may easily escape upwardly between the elongated nozzle tubes without effecting in any undesired manner the drying air which is blown downwards from the nozzles.
  • the cross-section of the aggregate should approximately be of the same size as the body to be dried and this body should also be positioned coaxially with the aggregate in order to avoid any loss of energy to drying air which is not utilized. Simultaneously the air will then have the best possibilities for getting away without doing any harm.
  • An apparatus for drying ceramic bodies as they are transported along a horizontal path comprising a casing extending above said path and containing at least one air pressure chamber and air outlet means; a nozzle aggregate for each ceramic body to be dried, each aggregate comprising a plurality of elongated parallel noules extending downwardly from said chamber to the vicinity of said path, and means to supply air to said chamber at a predetermined pressure so that it passes through said nozzles, contacts the surfaces of said bodies, and is then reflected upwardly therefrom, said nozzles being spaced apart sufficiently to allow the reflected gases to flow therethrough towards said air outlet means, the spacing between the discharge end of said nozzles and said ceramic body being such that the refiected gas will not impinge on the discharge from the nozzles.
  • An apparatus as claimed in claim 1 further comprising a conveyor on which said bodies are supported, said conveyor being adapted for stepwise conveyance of the bodies, each step corresponding to the distance between adjacent nozzle aggregates.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Drying Of Solid Materials (AREA)
US488898A 1964-09-23 1965-09-21 Drying equipment Expired - Lifetime US3348318A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK467164AA DK120989B (da) 1964-09-23 1964-09-23 Tørreanlæg.

Publications (1)

Publication Number Publication Date
US3348318A true US3348318A (en) 1967-10-24

Family

ID=8135657

Family Applications (1)

Application Number Title Priority Date Filing Date
US488898A Expired - Lifetime US3348318A (en) 1964-09-23 1965-09-21 Drying equipment

Country Status (8)

Country Link
US (1) US3348318A (de)
AT (1) AT260090B (de)
BE (1) BE670048A (de)
CH (1) CH439118A (de)
DE (2) DE1604774A1 (de)
DK (1) DK120989B (de)
GB (1) GB1099950A (de)
NL (1) NL6512230A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0533406A1 (de) * 1991-09-18 1993-03-24 Limited Rotajet Trocknungsvorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8101659L (sv) * 1981-03-16 1982-09-17 Svenska Flaektfabriken Ab Forfarande och anordning vid temperering samt forfarande for att overfora overtryck i en mot dynamiskt tryck blockerad passage
DD219267A1 (de) * 1983-09-26 1985-02-27 Keramik Wtb Veb Verfahren zur trocknung keramischer artikel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573217A (en) * 1947-04-30 1951-10-30 Onondaga Pottery Company Ware drying apparatus
US2702435A (en) * 1954-01-13 1955-02-22 Harker Pottery Company Ceramic ware drier
US2709307A (en) * 1952-09-27 1955-05-31 Onondaga Pottery Company Apparatus for drying articles of pottery ware
US2921411A (en) * 1951-07-27 1960-01-19 Pittsburgh Plate Glass Co Apparatus for the air chilling of bent glass
US3175301A (en) * 1961-11-21 1965-03-30 Owens Illinois Glass Co Glassware cooling and transfer apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573217A (en) * 1947-04-30 1951-10-30 Onondaga Pottery Company Ware drying apparatus
US2921411A (en) * 1951-07-27 1960-01-19 Pittsburgh Plate Glass Co Apparatus for the air chilling of bent glass
US2709307A (en) * 1952-09-27 1955-05-31 Onondaga Pottery Company Apparatus for drying articles of pottery ware
US2702435A (en) * 1954-01-13 1955-02-22 Harker Pottery Company Ceramic ware drier
US3175301A (en) * 1961-11-21 1965-03-30 Owens Illinois Glass Co Glassware cooling and transfer apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0533406A1 (de) * 1991-09-18 1993-03-24 Limited Rotajet Trocknungsvorrichtung
US5388346A (en) * 1991-09-18 1995-02-14 Rotajet Limited Method and apparatus for drying ceramic ware by use of air jets

Also Published As

Publication number Publication date
DE1927987U (de) 1965-11-25
NL6512230A (de) 1966-03-24
DE1604774A1 (de) 1970-07-23
CH439118A (de) 1967-06-30
AT260090B (de) 1968-02-12
GB1099950A (en) 1968-01-17
DK120989B (da) 1971-08-09
BE670048A (de) 1966-01-17

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