US2717419A - Method and apparatus for forming compacted bodies - Google Patents

Method and apparatus for forming compacted bodies Download PDF

Info

Publication number
US2717419A
US2717419A US318298A US31829852A US2717419A US 2717419 A US2717419 A US 2717419A US 318298 A US318298 A US 318298A US 31829852 A US31829852 A US 31829852A US 2717419 A US2717419 A US 2717419A
Authority
US
United States
Prior art keywords
rolls
chain
bodies
compacted bodies
compacted
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
US318298A
Inventor
David F Dickey
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.)
Electrolyser Corp Ltd
Original Assignee
Electrolyser Corp Ltd
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 Electrolyser Corp Ltd filed Critical Electrolyser Corp Ltd
Priority to US318298A priority Critical patent/US2717419A/en
Application granted granted Critical
Publication of US2717419A publication Critical patent/US2717419A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/16—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
    • 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
    • Y10S100/00—Presses
    • Y10S100/903—Pelleters
    • Y10S100/907—Rotary
    • 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
    • Y10S29/00—Metal working
    • Y10S29/031—Pressing powder with other step

Definitions

  • This invention relates to a method and apparatus for forming compacted bodies from a mixture of powder and binder. It is particularly applicable to the treatment of iron powder wherein the iron powder is mixed with a carbonaceous binder and the mixture compacted into compacted bodies such as briquettes.
  • Iron powder itself is readily oxidized and is not in a form suitable for melting in a furnace. It is therefore desirable to compact it into briquettes which can be charged into the melting furnace.
  • Iron powder or briquettes made therefrom without the use of a carbonaceous binder have a relatively high melting point and it is therefore desirable to mix the iron powder with a carbonaceous binder in order that the briquettes made therefrom will have a suitably. low melting point due to the presence of the carbon in the briquettes:
  • the present invention provides a method and apparatus for intimately mixing iron powder or other powder with a carbonaceous binder and forming compacted bodies from the mixture.
  • Figure 1 is a longitudinal section through the whole apparatus
  • Figure 2 is a sectional view, on a larger scale, of the forming rolls, illustrating the formation of chains of compacted bodies from the mixture of powder and binder and the severance of the compacted bodies into separate bodies;
  • Figure 3 is a sectional view of one of the forming rolls and associated parts taken along the line IIIIII of Figure 2;
  • Figure 4 is a view similar to Figure 2, but illustrating a different embodiment in which two sets of rolls are employed.
  • iron powder which may have been produced in a reduction furnace of the type disclosed in my application Serial No. 313,137, filed October 4, 1952, is introduced, while protected from the atmosphere, into a chamber formed by a casing 2.
  • the iron powder is fed from a chute 3 onto a conveyor 4, and as the iron powder passes in the direction indicated by the arrow 5, it is sprayed by sprays 6 with a solution of an organic binder in a suitable low boiling point solvent.
  • Various carbonaceous binders may be employed, as for example pitch, tar or wax.
  • various low boiling point solvents may be employed, as for example gasoline, kerosene, hexadecane, propane, pentane or carbon tetrachloride.
  • the iron powder which has been thus treated drops from the end of the conveyor 4 into the bite between a first set of horizontal rolls composed of the rolls 7 and 8. It then passes between a second set of rolls composed of rolls 9 and 10, and then between a third set of rolls composed of the rolls 11 and 12.
  • Each of the rolls is provided with longitudinal grooves 13, as more fully explained later, which compact Z ,7 1 7,419 Patented Sept. 13, 1955 and knead the mixture into compacted bodies or briquettes.
  • the compacted bodies 14 issuing from the last set of rolls drop to the bottom of a chamber 15 in which the various sets of rolls are located and from time to time are discharged from the chamber through a revolving door 16.
  • Each of the forming rolls is hollow so that steam or other heat means may be fed thereto for heating them to a suitable temperature, and each of the rolls is provided with means for driving it.
  • the roll 8 is provided with trunnions 17 and 17a mounted in suitable bearings 18 carried by end plates 19.
  • the plates 19 act as end plates for the cylindrical molds formed by the grooves 13 in the rolls.
  • a steam inlet pipe 20 leads to a steam chamber 21 surrounding and rotatably receiving the trunnion 17a.
  • the trunnion 17a is provided with inlet openings 22.
  • a tube 23 provided with inlet openings 23a and outlet openings 23b is located inside the roll 8 and trunnion 17a.
  • a steam chamber 25 surrounding and rotatably receiving the trunnion 17a, the chamber 25 being connected to a steam return pipe 26.
  • the trunnion 17 is provided with a gear wheel 27 for rotating the roll.
  • the various sets of forming rolls are heated to a temperature suiiicient to volatilize the solvent but not to volatilize any substantial portion of the binder. That is, where a solution of pitch dissolved in gasoline is employed, the temperature of the rolls is sufficient to volatilize the gasoline but not any substantial portion of the pitch.
  • the volatile solvent passes through a pipe 28 into and through a condenser 29. It then passes through a pipe 30 into a chamber 31 where pitch or other binder is introduced through pipe 32 and additional solvent to make up for that which is lost in the process is added through pipe 33.
  • the solution of binder and solvent are then pumped by pump 34 and pipe 35 back to the sprays 6 for treating a further quantity of powder on the conveyor 4.
  • Each of the rolls 7-12 is provided with longitudinal grooves 13 around its entire periphery. These grooves are semi-cylindrical so that the cooperating grooves of a set of rolls form substantially cylindrical compacted bodies from the powder.
  • the center distance c between the rolls 7 and 8 is slightly greater than twice the radius a of the rolls so that when iron powder and binder are fed between the bite of the first set of rolls, the rolls compact the powder but do not sever it into individual bodies.
  • the product issuing from the first set of rolls is in the form of a first chain 38 formed of compacted cylindrical bodies 39 connected together along their lengths by narrower rib portions 40 to form the chain.
  • the chain 38 is then fed between the second set of rolls composed of the rolls 9 and 10.
  • the rolls 9 and 1:) are spaced vertically with respect to the rolls 7 and 8 a distance such that and are so timed that the chain 38 of cylinders 39 in passing between the second set of rolls is re-formed into a new chain 41 of cylinders 42, each new cylinder 42 being composed of one-half of two adjacent cylinders 39 of the first chain 38.
  • the center distance 2 of the rolls 9 and 10. is slightly less than the center distance c of the rolls 7 and 8 in order to provide further compression and compacting of the material as it passes through the second set of rolls.
  • the center distance e of the second set of rolls is somewhat greater than twice the diameter a of the rolls so that in passing through the second set of rolls, the powder is not severed into separate compacted bodies but still remains in the form of a chain composed of the cylinders 42 joined together by the ribs 43.
  • the chain 41 formed by the second set of rolls is then fed between a third set of rolls composed of rolls 11 and 12.
  • the rolls 11 and 12 are timed and spaced vertically with respect to the rolls 9 and 10 so that the chain 41 of cylinders 42 is reformed and divided into separate cylinders 14, each cylinder 14 being composed of onehalf of two adjacent cylinders 42.
  • the center distance g of rolls 11 and 12 is such that separate detached cylinders 14 are produced from the chain 41.
  • each cylinder 42 is composed of one-half of two adjacent cylinders 39 of the first chain 38 and each cylinder 14 is composed of one-half of two adjacent cylinders 42 of the second chain 41. It is not necessary that the subsequent cylinders be composed of equal parts of previously formed cylinders in order to obtain intimate mixing and kneading of the powder, it being sufficient if the subsequent cylinders are formed from substantial portions of previously formed adjacent cylinders.
  • the compacted bodies such as the bodies 39, 42 and 14 need not be cylindrical but can be of other shapes. Instead of using longitudinal grooves in the rolls, I may use cups which form substantially ball-shaped or other shaped compacted bodies joined together by portions of lesser cross sections to form a chain. Irrespective of the shape of the compacted bodies, any number of sets of rolls may be employed depending upon the requirements of the powder for suitable blending of the binder and density of the compact.
  • Figure 4 illustrates another embodiment of the invention in which only two sets of rolls are employed.
  • the first set is composed of rolls 45 and 46 and the second set is composed of the rolls 47 and 43.
  • Each of the rolls has longitudinal grooves 49 formed throughout its periphery.
  • the center spacing h of the rolls 45 and 46 is such as to produce a chain 50 of compacted bodies similar to that shown in Figure 2 and composed of cylinders 51 connected by ribs 52.
  • the center spacing i of the second set of rolls 47 and 48 is such as to sever the chain 50 into separate detached cylinders 53, and to further compact the powder in passing through the second set of rolls.
  • Each of the cylinders 53 is composed of one-half of two adjacent cylinders 51 of the chain 50.
  • the embodiment shown in Figure 4 differs essentially from that shown in Figure 2 only in that the intermediate set of rolls is omitted.
  • the last set of rolls used in carrying out the method could be so spaced and timed with respect to the immediately preceding set of rolls that the last set of rolls merely severs the previously formed chain along the connecting ribs, such as the ribs 43 or 52, without reforming cylinders each composed of portions of two adjacent cylinders of a previously formed chain.
  • the method of forming compacted bodies from a mixture of powder and binder whichcomprises forming from the mixture a plurality of compacted bodies connected by portions of lesser cross section to form a chain, and reforming the chain into compacted bodies each composed of portions of adjacent compacted bodies of the chain.
  • the method of forming compacted bodies from a mixture of powder and binder which comprises shaping the mixture between a set of forming rolls to produce a chain formed of compacted bodies connected by portions of lesser cross section, and passing the chain between a second set of forming rollslto reform the chain into compacted bodies each composed of portions of adjacent compacted bodies of the chain.
  • the method of forming compacted bodies from a mixture of powder and binder which comprises forming from the mixture a first chain formed of compacted bodies connected by portions of lesser cross section reforming the first chain into a second chain of compacted bodies each composed of portions of adjacent bodies of the first chain, and reforming the second chain into compacted bodies detached from each other and each composed of portions of adjacent compacted bodies of the second chain.
  • the method of forming compacted bodies from a mixture of powder and binder which comprises forming from the mixture a compacted chain having alternate en-. larged bodies and ribs, and thereafter reformingthe chain into a second chain having alternate enlarged bodies and ribs in which each of the enlarged bodies is composed of portions of adjacent enlarged bodies of the first chain.
  • the method of forming compacted bodies from a mixture of powder and binder which comprises forming from the mixture a compacted chain having alternate enlarged bodies and ribs, and thereafter reforming and dividing the chain into detached compacted bodies, each composed of portions of adjacent enlarged bodies of the chain.
  • the methd of forming compacted bodies from a mixture of powder and binder which comprises forming from the mixture a plurality of substantially cylindrical bodies joined together along their lengths by ribs to form a chain of cylindrical bodies, and thereafter reforming the chain to form substantially cylindrical bodies, each composed of portions of adjacent substantially cylindrical bodies of the chain.
  • the method of forming compacted bodies from-a mixture of powder and binder which comprises compacting the mixture between rotating forming rolls to form a plurality of substantially cylindrical bodies joined together along their lengths by ribs to form a chain of cylindrical bodies, and thereafter further compacting the chainv and changing its shape by passing it through forming rolls-to. form a plurality of substantially cylindrical bodies, each composed of portions of adjacent substantially cylindrical bodies of the chain.
  • the method of forming compacted bodies from metal powder which comprises treating the powder by spraying it with an organic binder dissolved in a volatile solvent having a substantially lower boiling point than the binder, forming the treated powder into a plurality of compacted bodies connected by portions of lesser'cross section to form a chain, subjecting the chain to further compacting and deformation to form compacted bodies, each composed of portions of adjacent compacted bodies of the chain, the compacting being carried out between rotating surfaces, heating the rotating surfaces during compacting to a temperature sufiicient to volatilize the solvent but not the binder, recovering the solvent and using it together with binder for treating a further quantity of powder.
  • Apparatus for forming compacted bodies from a mixture of powder and binder which comprises a first set of horizontal rolls, a second set of horizontal rolls below and spaced from the first set, each of the rolls being provided with grooves in its periphery, the center spacing cf the first set of rolls being such as to form from the mixture supplied thereto a chain of compacted bodies connected by portions of lesser cross section, and means for rotating the first and second sets of rolls in timed relation to reform the chain into compacted bodies, each composed of pertions of adjacent compacted bodies of the chain.
  • Apparatus for forming compacted bodies from a mixture of powder and binder which comprises a first set of horizontal rolls, a second set of horizontal rolls below and spaced from the first set, a third set of horizontal rolls below and spaced from the second set, each of the rolls being provided with grooves in its periphery, the center spacing of the first set of rolls being such as to form from the mixture supplied thereto a first chain formed of compacted bodies connected by portions of lesser cross section, means for rotating the first, second and third sets of rolls in timed relation to reform the first chain into a second chain of compacted bodies, each composed of portions of adjacent compacted bodies of the first chain and to reform the second chain into compacted bodies detached from each other and each composed of portions of adjacent compacted bodies of the second chain.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Glanulating (AREA)

Description

Sept. 13, 1955 Dj F. DICKEY X 2,717,419
METHOD AND APPARATUS FOR FORMING COMPACTED BODIES Filed Nov. 1, 1952 2 sht s-sheet 1 i i l l l INVENTOR. David E Dickey V @W ATTORNE Y5 D. F. DlCKEY Sept. 13, 1955 METHOD AND APPARATUS FOR FORMING COMPACTED BODIES 2 Sheets-Sheet 2 Filed Nov. 1, 1952 INVENTOR. Dav/d E D/ckey 1" th-v H 5 ATTORNEYS United States Patent METHOD AND APPARATUS FOR FORMING COMPACTED BODIES David F. Dickey, Whitehall, Pa., assignor, by mesne assignments, to Electrolyser Corporation, Ltd., Toronto,
Ontario, Canada, a corporation of Canada Application November 1, 1952, Serial No. 318,298
12 Claims. (Cl; 189) This invention relates to a method and apparatus for forming compacted bodies from a mixture of powder and binder. It is particularly applicable to the treatment of iron powder wherein the iron powder is mixed with a carbonaceous binder and the mixture compacted into compacted bodies such as briquettes. Iron powder itself is readily oxidized and is not in a form suitable for melting in a furnace. It is therefore desirable to compact it into briquettes which can be charged into the melting furnace. Iron powder or briquettes made therefrom without the use of a carbonaceous binder have a relatively high melting point and it is therefore desirable to mix the iron powder with a carbonaceous binder in order that the briquettes made therefrom will have a suitably. low melting point due to the presence of the carbon in the briquettes:
The present invention provides a method and apparatus for intimately mixing iron powder or other powder with a carbonaceous binder and forming compacted bodies from the mixture.
In the accompanying drawings which illustrate two embodiments'of my invention in a diagrammatic manner, V
Figure 1 is a longitudinal section through the whole apparatus;
Figure 2 is a sectional view, on a larger scale, of the forming rolls, illustrating the formation of chains of compacted bodies from the mixture of powder and binder and the severance of the compacted bodies into separate bodies;
Figure 3 is a sectional view of one of the forming rolls and associated parts taken along the line IIIIII of Figure 2; and
Figure 4 is a view similar to Figure 2, but illustrating a different embodiment in which two sets of rolls are employed.
Referring more particularly to the accompanying drawings, and for the present to Figures 1-3, iron powder which may have been produced in a reduction furnace of the type disclosed in my application Serial No. 313,137, filed October 4, 1952, is introduced, while protected from the atmosphere, into a chamber formed by a casing 2. The iron powder is fed from a chute 3 onto a conveyor 4, and as the iron powder passes in the direction indicated by the arrow 5, it is sprayed by sprays 6 with a solution of an organic binder in a suitable low boiling point solvent. Various carbonaceous binders may be employed, as for example pitch, tar or wax. Similarly, various low boiling point solvents may be employed, as for example gasoline, kerosene, hexadecane, propane, pentane or carbon tetrachloride. The iron powder which has been thus treated drops from the end of the conveyor 4 into the bite between a first set of horizontal rolls composed of the rolls 7 and 8. It then passes between a second set of rolls composed of rolls 9 and 10, and then between a third set of rolls composed of the rolls 11 and 12. Each of the rolls is provided with longitudinal grooves 13, as more fully explained later, which compact Z ,7 1 7,419 Patented Sept. 13, 1955 and knead the mixture into compacted bodies or briquettes. The compacted bodies 14 issuing from the last set of rolls drop to the bottom of a chamber 15 in which the various sets of rolls are located and from time to time are discharged from the chamber through a revolving door 16.
Each of the forming rolls is hollow so that steam or other heat means may be fed thereto for heating them to a suitable temperature, and each of the rolls is provided with means for driving it. As shown in Figure '3, the roll 8 is provided with trunnions 17 and 17a mounted in suitable bearings 18 carried by end plates 19. The plates 19 act as end plates for the cylindrical molds formed by the grooves 13 in the rolls. A steam inlet pipe 20 leads to a steam chamber 21 surrounding and rotatably receiving the trunnion 17a. The trunnion 17a is provided with inlet openings 22. A tube 23 provided with inlet openings 23a and outlet openings 23b is located inside the roll 8 and trunnion 17a. The openings 23!) communicate with openings 24 in a steam chamber 25 surrounding and rotatably receiving the trunnion 17a, the chamber 25 being connected to a steam return pipe 26. Thus means is provided for introducing steam into each of the forming rolls. The trunnion 17 is provided with a gear wheel 27 for rotating the roll.
The various sets of forming rolls are heated to a temperature suiiicient to volatilize the solvent but not to volatilize any substantial portion of the binder. That is, where a solution of pitch dissolved in gasoline is employed, the temperature of the rolls is sufficient to volatilize the gasoline but not any substantial portion of the pitch. The volatile solvent passes through a pipe 28 into and through a condenser 29. It then passes through a pipe 30 into a chamber 31 where pitch or other binder is introduced through pipe 32 and additional solvent to make up for that which is lost in the process is added through pipe 33. The solution of binder and solvent are then pumped by pump 34 and pipe 35 back to the sprays 6 for treating a further quantity of powder on the conveyor 4.
Each of the rolls 7-12 is provided with longitudinal grooves 13 around its entire periphery. These grooves are semi-cylindrical so that the cooperating grooves of a set of rolls form substantially cylindrical compacted bodies from the powder. The center distance c between the rolls 7 and 8 is slightly greater than twice the radius a of the rolls so that when iron powder and binder are fed between the bite of the first set of rolls, the rolls compact the powder but do not sever it into individual bodies. The product issuing from the first set of rolls is in the form of a first chain 38 formed of compacted cylindrical bodies 39 connected together along their lengths by narrower rib portions 40 to form the chain.
The chain 38 is then fed between the second set of rolls composed of the rolls 9 and 10. The rolls 9 and 1:) are spaced vertically with respect to the rolls 7 and 8 a distance such that and are so timed that the chain 38 of cylinders 39 in passing between the second set of rolls is re-formed into a new chain 41 of cylinders 42, each new cylinder 42 being composed of one-half of two adjacent cylinders 39 of the first chain 38. The center distance 2 of the rolls 9 and 10. is slightly less than the center distance c of the rolls 7 and 8 in order to provide further compression and compacting of the material as it passes through the second set of rolls. It will be noted, however, that in this embodiment, the center distance e of the second set of rolls is somewhat greater than twice the diameter a of the rolls so that in passing through the second set of rolls, the powder is not severed into separate compacted bodies but still remains in the form of a chain composed of the cylinders 42 joined together by the ribs 43.
The chain 41 formed by the second set of rolls is then fed between a third set of rolls composed of rolls 11 and 12. The rolls 11 and 12 are timed and spaced vertically with respect to the rolls 9 and 10 so that the chain 41 of cylinders 42 is reformed and divided into separate cylinders 14, each cylinder 14 being composed of onehalf of two adjacent cylinders 42. The center distance g of rolls 11 and 12 is such that separate detached cylinders 14 are produced from the chain 41.
In order to further illustrate a working embodiment of the invention, the following dimensions are given for the parts designated in Figure 2, it being understood that the invention is not limited to these dimensions:
In the embodiment shown in Figure 2, each cylinder 42 is composed of one-half of two adjacent cylinders 39 of the first chain 38 and each cylinder 14 is composed of one-half of two adjacent cylinders 42 of the second chain 41. It is not necessary that the subsequent cylinders be composed of equal parts of previously formed cylinders in order to obtain intimate mixing and kneading of the powder, it being sufficient if the subsequent cylinders are formed from substantial portions of previously formed adjacent cylinders.
The compacted bodies such as the bodies 39, 42 and 14 need not be cylindrical but can be of other shapes. Instead of using longitudinal grooves in the rolls, I may use cups which form substantially ball-shaped or other shaped compacted bodies joined together by portions of lesser cross sections to form a chain. Irrespective of the shape of the compacted bodies, any number of sets of rolls may be employed depending upon the requirements of the powder for suitable blending of the binder and density of the compact.
Figure 4 illustrates another embodiment of the invention in which only two sets of rolls are employed. The first set is composed of rolls 45 and 46 and the second set is composed of the rolls 47 and 43. Each of the rolls has longitudinal grooves 49 formed throughout its periphery. The center spacing h of the rolls 45 and 46 is such as to produce a chain 50 of compacted bodies similar to that shown in Figure 2 and composed of cylinders 51 connected by ribs 52. The center spacing i of the second set of rolls 47 and 48 is such as to sever the chain 50 into separate detached cylinders 53, and to further compact the powder in passing through the second set of rolls. Each of the cylinders 53 is composed of one-half of two adjacent cylinders 51 of the chain 50. The embodiment shown in Figure 4 differs essentially from that shown in Figure 2 only in that the intermediate set of rolls is omitted.
The last set of rolls used in carrying out the method could be so spaced and timed with respect to the immediately preceding set of rolls that the last set of rolls merely severs the previously formed chain along the connecting ribs, such as the ribs 43 or 52, without reforming cylinders each composed of portions of two adjacent cylinders of a previously formed chain.
The formation of a chain of cylinders or other shape compacted bodies and the feeding of the chain through a subsequent set or sets of rolls insures intimate mixing and kneading of the binder and powder and the production of homogeneous, strong compacted bodies.
The invention is not limited to the preferred embodiments which have been illustrated and described, but may be otherwise embodied or practiced within the scope of the following claims.
I claim:
1. The method of forming compacted bodies from a mixture of powder and binder, whichcomprises forming from the mixture a plurality of compacted bodies connected by portions of lesser cross section to form a chain, and reforming the chain into compacted bodies each composed of portions of adjacent compacted bodies of the chain.
2. The method of forming compacted bodies from a mixture of powder and binder, which comprises shaping the mixture between a set of forming rolls to produce a chain formed of compacted bodies connected by portions of lesser cross section, and passing the chain between a second set of forming rollslto reform the chain into compacted bodies each composed of portions of adjacent compacted bodies of the chain.
3. The method of forming compacted bodies from a mixture of powder and binder, which comprises forming from the mixture a first chain formed of compacted bodies connected by portions of lesser cross section reforming the first chain into a second chain of compacted bodies each composed of portions of adjacent bodies of the first chain, and reforming the second chain into compacted bodies detached from each other and each composed of portions of adjacent compacted bodies of the second chain. 1
4. The method of forming compacted bodies from a mixture of powder and binder, which comprises forming from the mixture a compacted chain having alternate en-. larged bodies and ribs, and thereafter reformingthe chain into a second chain having alternate enlarged bodies and ribs in which each of the enlarged bodies is composed of portions of adjacent enlarged bodies of the first chain.
5. The method of forming compacted bodies from a mixture of powder and binder, which comprises forming from the mixture a compacted chain having alternate enlarged bodies and ribs, and thereafter reforming and dividing the chain into detached compacted bodies, each composed of portions of adjacent enlarged bodies of the chain.
6. The methd of forming compacted bodies from a mixture of powder and binder, which comprises forming from the mixture a plurality of substantially cylindrical bodies joined together along their lengths by ribs to form a chain of cylindrical bodies, and thereafter reforming the chain to form substantially cylindrical bodies, each composed of portions of adjacent substantially cylindrical bodies of the chain.
7. The method of forming compacted bodies from-a mixture of powder and binder, which comprises compacting the mixture between rotating forming rolls to form a plurality of substantially cylindrical bodies joined together along their lengths by ribs to form a chain of cylindrical bodies, and thereafter further compacting the chainv and changing its shape by passing it through forming rolls-to. form a plurality of substantially cylindrical bodies, each composed of portions of adjacent substantially cylindrical bodies of the chain.
8. A method according to claim 7, wherein the binderis dissolved in a volatile solvent and wherein the solvent is volatilized from the binder during compacting by heat transmitted from the rolls.
9. The method of forming compacted bodies from metal powder, which comprises treating the powder by spraying it with an organic binder dissolved in a volatile solvent having a substantially lower boiling point than the binder, forming the treated powder into a plurality of compacted bodies connected by portions of lesser'cross section to form a chain, subjecting the chain to further compacting and deformation to form compacted bodies, each composed of portions of adjacent compacted bodies of the chain, the compacting being carried out between rotating surfaces, heating the rotating surfaces during compacting to a temperature sufiicient to volatilize the solvent but not the binder, recovering the solvent and using it together with binder for treating a further quantity of powder.
10. Apparatus for forming compacted bodies from a mixture of powder and binder, which comprises a first set of horizontal rolls, a second set of horizontal rolls below and spaced from the first set, each of the rolls being provided with grooves in its periphery, the center spacing cf the first set of rolls being such as to form from the mixture supplied thereto a chain of compacted bodies connected by portions of lesser cross section, and means for rotating the first and second sets of rolls in timed relation to reform the chain into compacted bodies, each composed of pertions of adjacent compacted bodies of the chain.
11. Apparatus according to claim 10, wherein the center spacing of the second set of rolls is less than that of the first set to provide increased compression of the compressed bodies by the second set of rolls.
12. Apparatus for forming compacted bodies from a mixture of powder and binder, which comprises a first set of horizontal rolls, a second set of horizontal rolls below and spaced from the first set, a third set of horizontal rolls below and spaced from the second set, each of the rolls being provided with grooves in its periphery, the center spacing of the first set of rolls being such as to form from the mixture supplied thereto a first chain formed of compacted bodies connected by portions of lesser cross section, means for rotating the first, second and third sets of rolls in timed relation to reform the first chain into a second chain of compacted bodies, each composed of portions of adjacent compacted bodies of the first chain and to reform the second chain into compacted bodies detached from each other and each composed of portions of adjacent compacted bodies of the second chain.
References Cited in the file of this patent UNITED STATES PATENTS 389,117 WillcoX Dec. 9, 1884 1,539,052 McCrohan et al May 26, 1925 2 122,053 Burkhardt June 28, 1938

Claims (1)

10. APPARATUS FOR FORMING COMPACTED BODIES FROM A MIXTURE OF POWDER AND BINDER, WHICH COMPRISES A FIRST SET OF HORIZONTAL ROLLS, A SECOND SET OF HORIZONTAL ROLLS BELOW AND SPACED FROM THE FIRST SET, EACH OF THE ROLLS BEING PROVIDED WITH GROOVES IN ITS PERIPHERY, THE CENTER SPACING OF THE FIRST SET OF ROLLS BEING SUCH AS TO FORM FROM THE MIXTURE SUPPLIED THERETO A CHAIN OF COMPACTED BODIES CONNECTED BY PORTIONS OF LESSER CROSS-SECTION, AND MEANS FOR ROTATING THE FIRST AND SECOND SETS OF ROLLS IN TIMED RELATION TO REFORM THE CHAIN INTO COMPACTED BODIES, EACH COMPOSED OF PORTIONS OF ADJACENT COMPACTED BODIES OF THE CHAIN.
US318298A 1952-11-01 1952-11-01 Method and apparatus for forming compacted bodies Expired - Lifetime US2717419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US318298A US2717419A (en) 1952-11-01 1952-11-01 Method and apparatus for forming compacted bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US318298A US2717419A (en) 1952-11-01 1952-11-01 Method and apparatus for forming compacted bodies

Publications (1)

Publication Number Publication Date
US2717419A true US2717419A (en) 1955-09-13

Family

ID=23237563

Family Applications (1)

Application Number Title Priority Date Filing Date
US318298A Expired - Lifetime US2717419A (en) 1952-11-01 1952-11-01 Method and apparatus for forming compacted bodies

Country Status (1)

Country Link
US (1) US2717419A (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874604A (en) * 1956-03-22 1959-02-24 Prb Nv Apparatus for molding plastic explosive materials
US2882554A (en) * 1955-09-02 1959-04-21 Heck Friedrich Production of strips or bands from metal powder
US2895249A (en) * 1954-11-04 1959-07-21 Eben H Carruthers Artificial bait and method of activating bait
US2987987A (en) * 1958-06-27 1961-06-13 Avco Mfg Corp Pelleting apparatus
US2994917A (en) * 1953-07-31 1961-08-08 Chemetals Corp Apparatus for rolling metal powder
US3041716A (en) * 1956-01-18 1962-07-03 Commissariat Energie Atomique Method of treating metallic powders
US3049760A (en) * 1960-03-25 1962-08-21 Brendel Oskar Method and apparatus for mass-producing small balls of plastic materials
US3075243A (en) * 1960-09-07 1963-01-29 United States Steel Corp Briquetting method and apparatus
US3221368A (en) * 1960-07-08 1965-12-07 Koppern & Co Kommanditgesellsc Hot briquetting roller press
US3300815A (en) * 1964-12-17 1967-01-31 United States Steel Corp Briquette-parting apparatus
US3345999A (en) * 1964-08-04 1967-10-10 Universal Moulded Fiber Glass System for preparing and delivering liquid resin
US3988401A (en) * 1973-08-27 1976-10-26 Union Carbide Corporation Compression molding of thermoplastic material
US4161502A (en) * 1975-01-30 1979-07-17 The Dow Chemical Company Process for forming plastic articles
US4341727A (en) * 1981-01-14 1982-07-27 The B. F. Goodrich Company Processing vinyl extrudate
US4396561A (en) * 1979-10-15 1983-08-02 Horst Liebert Process for manufacturing mineral-wool mats
US4411611A (en) * 1980-05-16 1983-10-25 Mitsubishi Jukogyo Kabushiki Kaisha Briquetting machine
US4647468A (en) * 1984-05-18 1987-03-03 Nabisco Brands, Inc. Apparatus for forming filled edible products without waste
US4678419A (en) * 1985-03-15 1987-07-07 Voest-Alpine Aktiengesellschaft Arrangement for the production of vitrified slag
US4725217A (en) * 1985-07-01 1988-02-16 Kabushiki Kaisha Kobe Seiko Sho Compactor machine
US4955798A (en) * 1988-10-28 1990-09-11 Nuova Merisinter S.P.A. Process for pretreating metal in preparation for compacting operations
US5049166A (en) * 1990-02-27 1991-09-17 Washington Mills Ceramics Corporation Light weight abrasive tumbling media and method of making same
US5073323A (en) * 1990-05-30 1991-12-17 Washington Mills Ceramics Corporation Method and apparatus for producing compacted particulate articles
US6235076B1 (en) 1997-03-19 2001-05-22 Kawasaki Steel Corporation Iron base powder mixture for powder metallurgy excellent in fluidity and moldability, method of production thereof, and method of production of molded article by using the iron base powder mixture
US20090120586A1 (en) * 2007-11-09 2009-05-14 Spirit Aerosystems, Inc. Method and apparatus for forming adhesive strips
US20150274601A1 (en) * 2012-10-22 2015-10-01 Imerys Ceramics France Process and apparatus for making inorganic sheet
US11737402B2 (en) 2018-11-19 2023-08-29 Genus Industries, Llc Turf and lawn coir
US11758855B2 (en) * 2018-11-19 2023-09-19 Genus Industries, Llc Turf and lawn coir

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US309117A (en) * 1884-12-09 willcox
US1539052A (en) * 1924-03-13 1925-05-26 Mccrohan John Andrew Calendering, embossing, and cutting machine
US2122053A (en) * 1935-01-22 1938-06-28 Accumulatoren Fabrik Ag Process of manufacturing porous metallic bodies

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US309117A (en) * 1884-12-09 willcox
US1539052A (en) * 1924-03-13 1925-05-26 Mccrohan John Andrew Calendering, embossing, and cutting machine
US2122053A (en) * 1935-01-22 1938-06-28 Accumulatoren Fabrik Ag Process of manufacturing porous metallic bodies

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2994917A (en) * 1953-07-31 1961-08-08 Chemetals Corp Apparatus for rolling metal powder
US2895249A (en) * 1954-11-04 1959-07-21 Eben H Carruthers Artificial bait and method of activating bait
US2882554A (en) * 1955-09-02 1959-04-21 Heck Friedrich Production of strips or bands from metal powder
US3041716A (en) * 1956-01-18 1962-07-03 Commissariat Energie Atomique Method of treating metallic powders
US2874604A (en) * 1956-03-22 1959-02-24 Prb Nv Apparatus for molding plastic explosive materials
US2987987A (en) * 1958-06-27 1961-06-13 Avco Mfg Corp Pelleting apparatus
US3049760A (en) * 1960-03-25 1962-08-21 Brendel Oskar Method and apparatus for mass-producing small balls of plastic materials
US3221368A (en) * 1960-07-08 1965-12-07 Koppern & Co Kommanditgesellsc Hot briquetting roller press
US3075243A (en) * 1960-09-07 1963-01-29 United States Steel Corp Briquetting method and apparatus
US3345999A (en) * 1964-08-04 1967-10-10 Universal Moulded Fiber Glass System for preparing and delivering liquid resin
US3300815A (en) * 1964-12-17 1967-01-31 United States Steel Corp Briquette-parting apparatus
US3988401A (en) * 1973-08-27 1976-10-26 Union Carbide Corporation Compression molding of thermoplastic material
US4161502A (en) * 1975-01-30 1979-07-17 The Dow Chemical Company Process for forming plastic articles
US4396561A (en) * 1979-10-15 1983-08-02 Horst Liebert Process for manufacturing mineral-wool mats
US4411611A (en) * 1980-05-16 1983-10-25 Mitsubishi Jukogyo Kabushiki Kaisha Briquetting machine
US4341727A (en) * 1981-01-14 1982-07-27 The B. F. Goodrich Company Processing vinyl extrudate
US4647468A (en) * 1984-05-18 1987-03-03 Nabisco Brands, Inc. Apparatus for forming filled edible products without waste
US4678419A (en) * 1985-03-15 1987-07-07 Voest-Alpine Aktiengesellschaft Arrangement for the production of vitrified slag
US4725217A (en) * 1985-07-01 1988-02-16 Kabushiki Kaisha Kobe Seiko Sho Compactor machine
US4955798A (en) * 1988-10-28 1990-09-11 Nuova Merisinter S.P.A. Process for pretreating metal in preparation for compacting operations
US5049166A (en) * 1990-02-27 1991-09-17 Washington Mills Ceramics Corporation Light weight abrasive tumbling media and method of making same
US5073323A (en) * 1990-05-30 1991-12-17 Washington Mills Ceramics Corporation Method and apparatus for producing compacted particulate articles
US6235076B1 (en) 1997-03-19 2001-05-22 Kawasaki Steel Corporation Iron base powder mixture for powder metallurgy excellent in fluidity and moldability, method of production thereof, and method of production of molded article by using the iron base powder mixture
US6503445B2 (en) 1997-03-19 2003-01-07 Kawasaki Steel Corporation Iron-based powder composition for powder metallurgy having higher flowability and higher compactibility and process for production thereof
US20090120586A1 (en) * 2007-11-09 2009-05-14 Spirit Aerosystems, Inc. Method and apparatus for forming adhesive strips
US7874829B2 (en) * 2007-11-09 2011-01-25 Spirit Aerosystems, Inc. Method and apparatus for forming adhesive strips
US20150274601A1 (en) * 2012-10-22 2015-10-01 Imerys Ceramics France Process and apparatus for making inorganic sheet
US11737402B2 (en) 2018-11-19 2023-08-29 Genus Industries, Llc Turf and lawn coir
US11758855B2 (en) * 2018-11-19 2023-09-19 Genus Industries, Llc Turf and lawn coir

Similar Documents

Publication Publication Date Title
US2717419A (en) Method and apparatus for forming compacted bodies
DE112010005033B4 (en) Process for the multiplication of coke oven gas by the use of carbon dioxide
DE2113852A1 (en) Method and apparatus for producing fine powders
US4601728A (en) Method and apparatus for preparing a material for hot briquetting
DE4128379C2 (en) Method and device for the direct reduction of iron
US2277067A (en) Manufacture of metal products
DE1034601B (en) Process and device for the production of solid, amorphous silicon dioxide in finely divided form
US2296498A (en) Manufacture of metal products
US2955991A (en) Apparatus for heating agglutinating coal
DE2136725B2 (en)
US1927219A (en) Coal distilling apparatus
DE2425232B1 (en) Process for graphitizing molded bodies made of hard burnt charcoal
US3012970A (en) Method of preparing a charge for a furnace
US1322195A (en) Manufacture of cyanids.
US887379A (en) Method of preparing ores for use in the manufacture of steel.
US1306928A (en) Ale sinding-larsen
AT103061B (en) Rotary kiln.
US1977428A (en) Cupola
US2152718A (en) Process for the production of sintered products
US531459A (en) crossley
AT225212B (en) Method and device for performing metallurgical processes, in particular wind freshening processes
AT165534B (en) Process for the production of iron powder by reduction
US615266A (en) Apparatus for making cyanids
EP0922679A1 (en) Method of foaming material, especially slag or glass
DE567328C (en) Device for the production of hydrofluoric acid