US1845193A - Foundry sand rubbing machine - Google Patents

Foundry sand rubbing machine Download PDF

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Publication number
US1845193A
US1845193A US467306A US46730630A US1845193A US 1845193 A US1845193 A US 1845193A US 467306 A US467306 A US 467306A US 46730630 A US46730630 A US 46730630A US 1845193 A US1845193 A US 1845193A
Authority
US
United States
Prior art keywords
sand
disk
muller
mullers
rubbing machine
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
US467306A
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English (en)
Inventor
Ronceray Eugene
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.)
Ets PH BONVILLAIN AND E RONCERAY SA
Original Assignee
Ets PH BONVILLAIN AND E RONCERAY SA
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 Ets PH BONVILLAIN AND E RONCERAY SA filed Critical Ets PH BONVILLAIN AND E RONCERAY SA
Application granted granted Critical
Publication of US1845193A publication Critical patent/US1845193A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B22C5/0454—Blending, mixing, kneading or stirring; Methods therefor with bottom disc rotating about a vertical axis or with receptacle rotating about a vertical or steeply inclined axis, e.g. with fixed or driven tools, such as rolls
    • 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
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/10—Foundry sand treatment
    • 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
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/601—Sand mullers

Definitions

  • the crushing machines of the pan and muller type usually comprise comparatively narrow mullers of large diameter, and l1 ence their action resembles a rolling and rat a rubbing effect. Certain machines even employ tapered rollers in order to obtain an improved rolling action.
  • the present invention has for its object a rubbing machine for treating foundry sand, in which the cylindrical mullers have such a length that the line of contact of the roller occupies nearly the whole of the actual ra.- dius of the idisk, in such manner thatethe surface of the mullers will operate a rubbing action by their contact with the disk, on account of the sliding motion due to theA difference in developmentof various points-of them.
  • the stationary knives servin to cut up the fiat cakes of sand are dispose in several groups at diierent points on the surface of rthe said disk and angularly spaced ⁇ in each 50 group.
  • t. comprises a disk 1 which is iotatable on a.V
  • the rubbing-muller 7---7'a which are smooth and of cylindrical shape, are given such a length in the axial direction that the line of contact between the said mullers and the disk 1 shall have the maximum possible length.
  • This line extends upon'the whole of the effective radius of the disk, and'hence all points of the said muller will have the same linear rotary speed,whilst the points of the disk situated on a given radius have linear speeds depending upon their distance from the centre. For this reason, the mullers '7 7'a will slip with reference to the disk 1, and the sand on the disk will thus beX su jected to rubbing stresses.
  • the said mullers are longer than usual, they will preferably have a. reduced diameter, this being substantially equal to their length. Their weight per millimeter of length may vary from 1 to 1.5 kgs. Y
  • Knives or cutters 10-,10 serves to cut up the ilat cakes of sand before it againproceed under the mullers 7 ,.7; said knivesare not disposed in line as in known machines, in which a sort of .dam will be formed in whose' rear the sand has a tendency to accumulatie, but they 'are mounted in several secured, the rubbing mullers 7-7 being la the surface of the disk, and the knives are angularly spaced in each group.
  • each arm 11 or 11a is mountsaid knives are preferably engaged in slots provided in the plates 12, 12a.
  • scrapers 13, 13a which serve ,to maintain the mullers in a clean condition.
  • Said scrapers are preferably adjustably mounted, they being provided for instance withA slots 14,
  • the machine is also provided with vertically and horizontally adjustable Scrapers for guidingr the sand.
  • the scraper 16 nearest lthe center is mounted on the support 5 and is inclined from the radius so as to bring the sand which has been supplied near the. center, under the rollers,v7, 7a.
  • An ejecting scraper 18 is mounted at the end of the other arm 11a and is inclined from the radius in such a manner as to take up they sand at the outer edge ofthe disk and to discharge it from the disk into a recipient or any suitable apparatus adapted for subsequent working operations or for transportation.
  • a handle 19 may be provided onthe spindle 21 carrying the scraper 18 in order to permit an easy adjustment of'theangular position of the latter. "A similar arrangement may beprovided for scraper 17.
  • the operation is as follows.
  • the sand and bonding material are supplied, by hand lor by mechanical means at the centre of the apparatus, by means .of a spout 22 or the like.
  • the scraper 16 acts to direct the said mixture under the mullers 7 and 7 a, and these,
  • the sand can thus be treated in a continuous and entirely automatic manner, provided the raw material is supplied to the machine in suitable proportions. It will be noted that it is an easy matter to incorporate green sand into the old sand, the machine providing for an adequate mixing up ofboth materials.
  • a base plate a stationary pivot secured to said base plate, a disk rotatable on said pivot, means for supporting and driving said disk, a support on said pivot provided with lateral extensions, a carrier se-4 cured to each of said extensions, at least one j shaft secured on said support, a rocking arm pivoted on said shaft, a muller shaft secured parallel to said carrier, a muller adapted to cooperate with said disk and journalled on to said rocking arm opposite to said shaft and said muller shaft, the axis of said muller being parallel with a radius of said, disk and the generatrix of contact between said muller and said disk extending substantially on thewhole effective length of said radius, several groups of cutters distributed on said support extensions and said carriers for cutting up the cake of sand, a plate on said extensions and carriers to adjustably secure said means, an adjustable scraper on each of the arms for cleaning the lperiphery of said muller, an outer adjustable curved
  • a stationary vertical pivot a horizontal disk rotatable thereon, supporting means secured to-said pivot and at east one muller rotatably mounted on said supporting means adapted to cooperate with thedisc, the axis of the muller being parallell said radius, and angularly spaced groups ofcutters secured to said supporting means and y angularly spaced in each group for cutting up the cake of sand.
  • a rubbing machine adapted to coatV the old silicious grains of foundry sand with a film of a bonding substance, the combination of a horizontal and smooth disc, at least one cylindrical and smooth muller rotatably mountedl about a horizontal axis, means adapted to kimpart a relative rotary motion to said disc and muller about a vertical axis extending through the center of the disc',
  • a rubbing machine as claimed in claim 2 wherein said supporting means comprises a shaft situated substantially in the horizontal plane of the muller axis, a swinging arm pivoted at one end on said shaft and carrying at its other end a pin on which is rotatably mounted the muller, the weight of which per millimeter of length varying substantially from 1 to 1.5 kilograms.
  • a foundry sand rubbing machine comprising a disc and at least onemuller rotatably mounted about a horizontal axis, means adapted to impart a relative rotary motion to said disc and muller about a vertical axis extending through the center of the disc, an-.
  • a foundry sand rubbing machine as claimed in claim5, wherein said cutters in each group are clamped in a vertically -adjustable position on said supporting means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Grinding (AREA)
US467306A 1930-02-26 1930-07-11 Foundry sand rubbing machine Expired - Lifetime US1845193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR618432X 1930-02-26

Publications (1)

Publication Number Publication Date
US1845193A true US1845193A (en) 1932-02-16

Family

ID=8982957

Family Applications (1)

Application Number Title Priority Date Filing Date
US467306A Expired - Lifetime US1845193A (en) 1930-02-26 1930-07-11 Foundry sand rubbing machine

Country Status (4)

Country Link
US (1) US1845193A (de)
BE (1) BE378112A (de)
DE (1) DE618432C (de)
FR (2) FR690724A (de)

Also Published As

Publication number Publication date
DE618432C (de) 1935-09-09
FR47056E (fr) 1936-12-14
FR690724A (fr) 1930-09-25
BE378112A (de)

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