US3325350A - Machine for the manufacture of plates from fiber loaded paste, such as asbestos-cement paste - Google Patents

Machine for the manufacture of plates from fiber loaded paste, such as asbestos-cement paste Download PDF

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Publication number
US3325350A
US3325350A US386908A US38690864A US3325350A US 3325350 A US3325350 A US 3325350A US 386908 A US386908 A US 386908A US 38690864 A US38690864 A US 38690864A US 3325350 A US3325350 A US 3325350A
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US
United States
Prior art keywords
web
paste
asbestos
movement
cement
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Expired - Lifetime
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US386908A
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English (en)
Inventor
Verly Maurice Joseph Ghislain
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.)
Johns Manville NV SA
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Johns Manville NV SA
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Publication date
Application filed by Johns Manville NV SA filed Critical Johns Manville NV SA
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    • 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
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement

Definitions

  • the present invention relates to a machine for the manufacture of plates from a fiber-loaded paste, such as an asbestos-cement paste, in which a moving felt web is used for supporting paste layers driven by said web towards a forming cylinder. More particularly, the invention relates to a device for distributing the fibers in such a machine.
  • a fiber-loaded paste such as an asbestos-cement paste
  • some comprise a cylindrical sieve having a large diameter, the felt web being pressed against said sieve which is immersed in the vessel containing the paste,
  • the felt licks the paste with one of its faces.
  • the paste which is deposited on the sieve is applied by a pressure on the felt web which drives said paste away.
  • a suction applied through the felt web causes a thin paste layer to be deposited on said felt web, while moving towards the forming cylinder.
  • the object of this invention is to obviate this heterogeneity.
  • a stirrer comprising a rake provided with teeth which extend in the direction of the felt web movement and which are substantially parallel to said web, as well as a mechanism for imparting a movement comprising a reciprocating movement component in a normal direction to the direction of the felt web movement and a reciprocating movement component in a substantially parallel direction to the felt we-b movement, both movement components being parallel to the plane of said felt web.
  • the rake comprises a substantially horizontal bar with teeth substantially extending in planes perpendicular thereto, said bar being carried by a pendulum suspension comprising at least two links, each link being hinged at the one end to the bar and at the other end, to a fixed point situated above said bar.
  • the rake is preferably provided with a vibrating device.
  • FIGURE 1 is a view of the rake according to the present invention as viewed from within the paste containin g vessel, part of the teeth being shortened or omitted.
  • FIGURE 2 is a sectional view of the rake made along line IIII of FIGURE 1.
  • numeral reference 1 generally indicates a vessel containing an asbestos-cement paste 5.
  • the vessel 1 comprises side walls 10, 10' and front and rear end walls 20, 20', respectively.
  • the front end wall 20 is provided with an opening 3 against which is drawn a continuous felt web 4 drawn in the direction illustrated by arrow by a drive mechanism (not shown).
  • a vacuum box 6 connected through a pipe 7 to a suction pump (not shown) is disposed in front of the felt web and pressed against it.
  • the asbestos-cement fibers are deposited on felt web 4 in the form of a layer 8 as a result of the vacuum action in box 6.
  • the stirrer which is the main component of the machine according to the present invention is a substantially flat device disposed in a plane parallel to the felt Web 4. It comprises a bar 9 which is substantially horizontal and teeth 11 substantially vertical and fixedly connected thereto.
  • the bar 9 is hinged at 13 and 1.3 to a pair of links 12, 12' the other end of which are themselves hinged to a stationary part 15 of the machine frame at 14, 14' respec tively.
  • the bar 9 is connected by means of a link 16 to a crank plate 17 rotatably driven by a motor schematically illustrated and indicated by reference 2.
  • a vibrating device 18 is connected to bar 9.
  • the crank plate rotation imparts to bar 9 a reciprocating motion in a plane parallel to the plane of the web 4.
  • the rake movement has a component which is parallel to the longitudinally extending direction of bar 9.
  • the teeth are moving in a direction substantially parallel to felt web 4. This motion tends to prevent the asbestos-cement fibers alignment on felt web 4 along a direction parallel to its motion direction.
  • the vertical component of the rake motion results in sinking teeth 11 in the paste in a direction parallel to the extending direction of the teeth while at the end of the stroke of bar 9, the teeth are rnoving upwardly.
  • crank plate 17 was 6 inches in diameter and rotatably driven at a speed of 200 rpm. The net effect is a 200 cycle reciprocating motion with an elongation of 6 inches.
  • the links were 2 feet in length.
  • the rake needs not be plane.
  • the rake teeth are provided with a curved disposition so that the whole length thereof remains in close proximity with the felt web surface.
  • means for effecting the orient-ation of the asbestos fibers as the asbestos-cement slurry is deposited onto said web comprising:
  • (c) means for imparting a movement to said rake References Cited comprising a reciprocating movement component in UNITED STATES PATENTS a d1rect1on normal to the direction of movement of 1,370,184 3/1921 Brown 162*311 said Web and a reciprocatlng movement component 2 779 252 1/1957 W elZ 162 313 in a direction substantially parallel to the direction of 5 movement of said Web, and FOREIGN PATENTS (d) 'both of said movements being in a plane parallel 28 300 8/1884 Germany. to the plane of Said Web. 528:352 6/1931 Germany.
  • Apparatus as defined in claim 1 and further com- 10 prising S. LEON BASHORE, Acting Primary Examiner.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Producing Shaped Articles From Materials (AREA)
US386908A 1963-08-09 1964-08-03 Machine for the manufacture of plates from fiber loaded paste, such as asbestos-cement paste Expired - Lifetime US3325350A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE509612 1963-08-09

Publications (1)

Publication Number Publication Date
US3325350A true US3325350A (en) 1967-06-13

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US386908A Expired - Lifetime US3325350A (en) 1963-08-09 1964-08-03 Machine for the manufacture of plates from fiber loaded paste, such as asbestos-cement paste

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US (1) US3325350A (he)
BE (1) BE636023A (he)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149930A (en) * 1975-01-22 1979-04-17 Fulgurltwerke Seelze Und Eichriede In Luthe Bel Hannover Adolf Oesterheld Method and apparatus for making asbestos-cement boards

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE28300C (de) * G. H. MEHNER in Nossen i. S Stoffrührer an Siebcylindern von Papiermaschinen
US1370184A (en) * 1919-11-10 1921-03-01 David L Brown Paper-making machine
DE528352C (de) * 1924-06-19 1931-06-27 Paul Pape Entwaesserungsmaschine fuer Papier- und Pappenstoff
US2779252A (en) * 1952-05-15 1957-01-29 Filtrox Werk Ag Apparatus for making boardlike products from a fibrous cement mixture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE28300C (de) * G. H. MEHNER in Nossen i. S Stoffrührer an Siebcylindern von Papiermaschinen
US1370184A (en) * 1919-11-10 1921-03-01 David L Brown Paper-making machine
DE528352C (de) * 1924-06-19 1931-06-27 Paul Pape Entwaesserungsmaschine fuer Papier- und Pappenstoff
US2779252A (en) * 1952-05-15 1957-01-29 Filtrox Werk Ag Apparatus for making boardlike products from a fibrous cement mixture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149930A (en) * 1975-01-22 1979-04-17 Fulgurltwerke Seelze Und Eichriede In Luthe Bel Hannover Adolf Oesterheld Method and apparatus for making asbestos-cement boards

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Publication number Publication date
BE636023A (he)

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