US3568755A - Machine for the manufacture of articles of a slurry of solid matter in a liquid - Google Patents

Machine for the manufacture of articles of a slurry of solid matter in a liquid Download PDF

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Publication number
US3568755A
US3568755A US732652A US3568755DA US3568755A US 3568755 A US3568755 A US 3568755A US 732652 A US732652 A US 732652A US 3568755D A US3568755D A US 3568755DA US 3568755 A US3568755 A US 3568755A
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United States
Prior art keywords
mould
slurry
improvement
air
vessel
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Expired - Lifetime
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US732652A
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English (en)
Inventor
Daniel Fredrik Ednell
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.)
Foseco Trading AG
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Foseco Trading AG
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/06—Ingot moulds or their manufacture
    • B22D7/10—Hot tops therefor
    • B22D7/108—Devices for making or fixing hot tops
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/268—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor by dipping moulding surfaces in the slip

Definitions

  • Parker ABSTRACT A machine for manufacture of articles by deposition of solid matter in a slurry on a perforated mould, a pressure difference being established for forcing the liquid component through the said pressure difference being reversed to blow off the deposited article, the blowing means being located outside the means for depositing the solid matter.
  • the present invention is related to a machine for the manufacture of articles by deposition of solid matter in a slurry on a hollow perforated mould, which, while it is submerged in the slurry, is subjected to a pressure difference so that the slurry liquid will be drained through the mould, while the solid matter is deposited on one side of the mould, the deposited article being releasable from the mould by means of an opposite pressure difference.
  • the articles which may be manufactured on machines of this type can have various uses, but the machines are particularly adapted to manufacture of refractory details arid components for moulds for casting metal. These components are manufactured by various manufacturers and the articles are delivered to foundries. The components which are most in demand are usually in store ready to be dispatched as required. For larger foundries with continuous casting of metal it is very important "that the foundry is continuously and evenly supplied with the refractory components as it would be too costly to have all that is needed in store. For this reason larger foundries have started to manufacture the refractory components for, the casting moulds, and this manufacture will then have to be in step with the other casting operations.
  • the object of the present invention is therefore primarily to provide a machine of the kind in question, having good reliability and also possibilities of being included in existing plants, the machine being able to work at high speeds.
  • the problem is solved by blowing the article from the mould by an air blast. Due to the air blast the deposited article will expand slightly so that it will not be retained in the perforations of the mould, and when the work is continuous it is of advantage to let the deposited article when it is blown off pass directly to the casting mould the article is to be combined with. Due to this short transport of the articles the possiblity of damaging the articles is substantially reduced.
  • the machine according to the invention is consequently mainly characterized in that it comprises a blow device located outside the slurry vessel and movable for cooperation with the mould when the mould is brought under the blow device, as lowering of the blow device controls valves admitting air under pressure to the mould so that the deposited article is loosened from same.
  • a preferred embodiment of the invention is characterized in that the blow device is in the form of an air cylinder which at one end is closed by a ball valve, the ball of which being releasable by an abutment when the cylinder is lowered on the the mould, whereby the supply of air under pressure to the interior of the mould is established.
  • the mould is, in accordance with the invention, provided with a one-way valve at the bottom, the valve body of said valve opening when abutting a projection in the slurry vessel for-draining of liquid, while the valve closes the mould when the deposited article is to be blown off.
  • FIG. 1 is a section through a slurry vessel with the mould in place ready for deposition of solid matter to form the article;
  • FIG. 2 is a section through another part of the machine in accordance with the invention.
  • FIG. 3 is a view corresponding to FIG. 2 when the deposited article is blown off.
  • the machine comprises a slurry vessel which, by means of automatic equipment, is filled with a slurry to the level indicated at 2.
  • a level indicator 3 controls a valve 4 to keep the level of the slurry constant.
  • the vessel 1 is divided into two chambers 5 and 6 by means of a partition 7 which is open at the lower end as indicated at 8.
  • a perforated mould 9 is located and on the mould the solids of the slurry are to be deposited.
  • Air under pressure is supplied at an inletll) by means of a valve 11.
  • the air enters the outer chamber 6 and drives the slurry up through the opening 8 and into the chamber 5.
  • the slurry occupies the space around the mould 9 and the slurry liquid is forced through the mould by the air under pressure.
  • the slurry-liquid is drained away through the outlet 12.
  • a valve 13 is in an interconnection 14 between the two chambers 5 and 6 is opened to equalize the pressure in these chambers. The remaining part of the slurry in the chamber 5 will then flow down into the chamber 6, and as long as the vales ll and 13 are open the air under pressure will provide further draining of liquid in the deposited article.
  • the mould 9 is attached to a rotatable disc which is indicated only diagrammatically at 18, and this disc is raised and carries the mould 9 with the deposited article so that the mould 9 is brought under a blow device which is shown in FIG. 2.
  • the blow device comprises an air cylinder 19 which may be raised and lowered, for example pneumatically, and it has an air inlet at 20 near the upper end, while the lower end is closed by a ball valve 21.
  • a projection 22 above the mould will lift the ball 21, as shown on FIG. 3, so that the air can enter the interior of the mould 9.
  • the mould 9 In order to blow off the deposited article 24 the mould 9 must be closed, and the valve 16 which is open in FIG. 1, is in FIGS.
  • Packing devices 23 which fit closely around the lower end of the cylinder 19 when the cylinder 19 is in its lower position are shown in FlGS. 2 and 3.
  • the mould 9 is in the example shown suspended in chains 25 and it may be lowered together with the air cylinder 19, as shown in FIG. 3. By suspending the mould 9 in chains 25 or in another movable manner the positioning of the components to which the article 24 is to be transferred, is no longer critical.
  • the present invention has provided a very simple, sturdy and reliable construction of a machine for continuous manufacture of the articles in question under difficult conditions, and the embodiment described shall not be considered as a limitation of the protection offered by this patent as other embodiments are possible within the scope of the invention, the valves for example may be designed in other manners and the mould may be suspended in other elements than the chains shown. Control means, automatic regulators etc. which form no part of the invention, are not included in this specification.
  • Improvement in a machine for manufacturing articles by deposition of slurry comprising a hollow perforated mould, a slurry vessel adapted to receive the mould, means for removing the mould from the slurry vessel, a blowing device in the form of a vertically movable air cylinder closed at one end by a ball valve for supplying air under pressure to the interior of the mould to loosen a deposited article from the mould, and abutment means contacting and releasing the ball of said ball valve when the cylinder is in a position lowered towards the mould to establish a supply of air to the interior of the mould.
  • Improvement as claimed in claim 1 including packing devices which fit closely to the end of the cylinder when the cylinder is in the lower position.
  • the slurry vessel is divided into two chambers by wall means, each of said chambers having means for supplying air under pressure with interconnections for supply of air under pressure to one chamber, the other chamber or both chambers, a supply of air to one chamber being efiective to drive slurry up round the mould and a supply of air to the other chamber being effective to drive slurry away from the mould, and to drive air through the mould and the deposited matter.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
US732652A 1967-07-03 1968-05-28 Machine for the manufacture of articles of a slurry of solid matter in a liquid Expired - Lifetime US3568755A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO168914A NO120851B (enrdf_load_stackoverflow) 1967-07-03 1967-07-03

Publications (1)

Publication Number Publication Date
US3568755A true US3568755A (en) 1971-03-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US732652A Expired - Lifetime US3568755A (en) 1967-07-03 1968-05-28 Machine for the manufacture of articles of a slurry of solid matter in a liquid

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US (1) US3568755A (enrdf_load_stackoverflow)
GB (1) GB1212566A (enrdf_load_stackoverflow)
NO (1) NO120851B (enrdf_load_stackoverflow)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290083A (en) * 1940-06-04 1942-07-14 William R Webster Continuous molding machine
US2356013A (en) * 1943-08-03 1944-08-15 Rossi Irving Continuous casting of metals
US3022540A (en) * 1953-10-06 1962-02-27 Continental Can Co Dipping apparatus for fabricating flexible containers
US3183292A (en) * 1962-05-25 1965-05-11 Dvoracek Frank Plastic molding apparatus and method
US3379804A (en) * 1964-06-10 1968-04-23 Konink Sphinx Ceramique V H Pe Method of the production of a body from a slip in a porous mold
US3380509A (en) * 1964-08-17 1968-04-30 Suedwestfalen Ag Stahlwerke Method of pressure treatment of metallic melts, especially steel melts
US3414471A (en) * 1964-03-26 1968-12-03 Henry Boucher Fils & Cie Pulp molding apparatus
US3439734A (en) * 1965-12-06 1969-04-22 Foseco Trading Ag Apparatus for forming hot top liners

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290083A (en) * 1940-06-04 1942-07-14 William R Webster Continuous molding machine
US2356013A (en) * 1943-08-03 1944-08-15 Rossi Irving Continuous casting of metals
US3022540A (en) * 1953-10-06 1962-02-27 Continental Can Co Dipping apparatus for fabricating flexible containers
US3183292A (en) * 1962-05-25 1965-05-11 Dvoracek Frank Plastic molding apparatus and method
US3414471A (en) * 1964-03-26 1968-12-03 Henry Boucher Fils & Cie Pulp molding apparatus
US3379804A (en) * 1964-06-10 1968-04-23 Konink Sphinx Ceramique V H Pe Method of the production of a body from a slip in a porous mold
US3380509A (en) * 1964-08-17 1968-04-30 Suedwestfalen Ag Stahlwerke Method of pressure treatment of metallic melts, especially steel melts
US3439734A (en) * 1965-12-06 1969-04-22 Foseco Trading Ag Apparatus for forming hot top liners

Also Published As

Publication number Publication date
GB1212566A (en) 1970-11-18
NO120851B (enrdf_load_stackoverflow) 1970-12-14

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