US1932741A - Method of manufacturing disintegrated bronze foils - Google Patents

Method of manufacturing disintegrated bronze foils Download PDF

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Publication number
US1932741A
US1932741A US536789A US53678931A US1932741A US 1932741 A US1932741 A US 1932741A US 536789 A US536789 A US 536789A US 53678931 A US53678931 A US 53678931A US 1932741 A US1932741 A US 1932741A
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US
United States
Prior art keywords
balls
drum
disintegrated
bronze
manufacturing
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
US536789A
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English (en)
Inventor
Kramer Erwin
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.)
Firm Hartstoff Metall A G
FIRM HARTSTOFF-METALL AG
Original Assignee
Firm Hartstoff Metall A G
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 Firm Hartstoff Metall A G filed Critical Firm Hartstoff Metall A G
Application granted granted Critical
Publication of US1932741A publication Critical patent/US1932741A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group

Definitions

  • This invention relates to an improved method for the manufacture of disintegrated bronze ioils, so-called bronze colors, as well as to an improved device for manufacturing such colors I with the aid 0! steel balls provided within a rotating drum that contains also the metal particles to be spread out, the balls being lifted by the drum when it rotates and being dropped upon the metallic particles whereby the spreading-out is eifected.
  • the object ofthe invention is to increase considerably the eificiency of said method, and I attain the object in view by determining the amount of the steel balls according to, or within, certain limits.
  • the manufacture of the bronze colors is carried out in this way that the most favorable efiiciency is determined by varying the degree of filling oi the drum with the particles. If that rule is applied to the-present case, the first result is that an increase of'the steel balls together with an increaseof the metal particles to be worked causes an increase of the amount of the finished particles. The output rises to a certain distinct maximum and becomes then lower it still more steel balls are introduced into the drum, and this reduction of the output increases with a further increase of the balls.
  • Figure 3 is a cross section on the line AB of Figure 2.
  • the ordinates show the output in kg. when aluminum particles are spread out; the abscissa: show the weight of the'steel balls inkg.permeterofthelengthofthedrum.
  • Fig. 1 shows also that the second maximum of the curve falls quickly when the amount of the steel balls is still more increased. Therefore, from reasons of precaution the amount of the steel balls will be so determined that it corresponds not directly to the maximum but to a little therebelow so that with respect to the inaccuracies the strongly declined portion of the curve is not suddenly arrived at.
  • the curve image can be determined, of course, with the aid of trials.
  • Generi b the principle can be stipulated that the amount of the steel balls when the drum is in its position of rest shall be such as to fill a segment of the circular sectional area of the drum, the height of the segmentamounting to more than two fifths of the radius of the circle. The upper limit which the height of the said 110 segment may have lies at about five sixths of said radius.
  • the high degree of filling of the drum with the balls produces also the favorable phenomenon that the point of gravity of the entire system lies comparatively near to the axis of rotation of thedrum, and that owing thereto the amount of power requisite for turning the drum is correspondingly slight.
  • the supply of the metal particles is, there.- fore, effected preferably by one of the known conveying devices, for instance a conveying worm, a rotary sluice or the like, whereas the discharge is effected with the aid of a current of air.
  • Figures 2 and 3 show a constructional form of a machine designed for carrying out the improved method.
  • the plant is completely closed and all members are filled with aninert gas in order to prevent an explosion.
  • 'I'he non-worked metal particles are contained in a store receptacle 1 and are conveyed from it to the tube 5 by means of a conveying worm located in the tube 3. From the tube '5 the particles pass into the drum 12 through one branch of a three-branch tube 9.
  • the drum contains the steel balls 15. The drum is rotary and is turned by any suitable driving means.
  • a current of air produced by the blower 6 enters through the tube 16, 17 also intothe tube 10 through the branch 17 of this tube, and streams through the drum 12 where it carries with it the suiliciently finely spread-out metallic particles which then are carried by that air through the tube or bend l3 and through a pipe 13 into the sifter 19 in which the metallic foils are sifted, the unfinished ones passing through a rotary sluice 23 into the branch 7 of the tube 10, from which they get back into the drum.
  • the finished particles pass through a tube 8 into a separating device, for instance a,
  • cyclone from which they get down to prevent der by subjecting metallic particlesto the falling action of balls in a rotary drum
  • the method of determining the proper proportions of the metallic particles and balls in order to obtain high efficiency inoutput of the powder which consists in placing a quantity ofballs inthe drum, supplying metallic particles'to the drum until the output of the metallicpowder rises-to a distinct maximum, and then supplying more balls until the output of the powder falls.- to a minimum and subsequently rises toa second maximum higher than the first maximum.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Metal Rolling (AREA)
US536789A 1930-05-16 1931-05-12 Method of manufacturing disintegrated bronze foils Expired - Lifetime US1932741A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1932741X 1930-05-16

Publications (1)

Publication Number Publication Date
US1932741A true US1932741A (en) 1933-10-31

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ID=7750055

Family Applications (1)

Application Number Title Priority Date Filing Date
US536789A Expired - Lifetime US1932741A (en) 1930-05-16 1931-05-12 Method of manufacturing disintegrated bronze foils

Country Status (3)

Country Link
US (1) US1932741A (de)
CH (1) CH156187A (de)
GB (1) GB363604A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523996A (en) * 1947-09-20 1950-09-26 Brockway Glass Co Inc Glass-sand treatment
US3709439A (en) * 1970-12-02 1973-01-09 Int Nickel Co Production of reflective metal flake pigments

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523996A (en) * 1947-09-20 1950-09-26 Brockway Glass Co Inc Glass-sand treatment
US3709439A (en) * 1970-12-02 1973-01-09 Int Nickel Co Production of reflective metal flake pigments

Also Published As

Publication number Publication date
CH156187A (de) 1932-07-31
GB363604A (en) 1931-12-24

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