US3790093A - Granulator - Google Patents

Granulator Download PDF

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Publication number
US3790093A
US3790093A US00200130A US3790093DA US3790093A US 3790093 A US3790093 A US 3790093A US 00200130 A US00200130 A US 00200130A US 3790093D A US3790093D A US 3790093DA US 3790093 A US3790093 A US 3790093A
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US
United States
Prior art keywords
screen
knives
rotor
bed knife
bed
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
US00200130A
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English (en)
Inventor
J Mcintyre
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.)
Leesona Corp
Cumberland Engineering Corp
Original Assignee
Cumberland Engineering Corp
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 Cumberland Engineering Corp filed Critical Cumberland Engineering Corp
Application granted granted Critical
Publication of US3790093A publication Critical patent/US3790093A/en
Assigned to JOHN BROWN INDUSTRIES LTD., A CORP. OF DE. reassignment JOHN BROWN INDUSTRIES LTD., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LEESONA CORPORATION; 333 STRAWBERRY FIELD RD., WARWICK, RI. A CORP. OF MA.
Assigned to LEESONA CORPORATION reassignment LEESONA CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE 3-31-81 STATE OF DELAWARE Assignors: JOHN BROWN INDUSTRIES LTD.
Anticipated expiration legal-status Critical
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
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/144—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with axially elongated knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/148—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers specially adapted for disintegrating plastics, e.g. cinematographic films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C2018/188—Stationary counter-knives; Mountings thereof
    • 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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • B02C2023/165—Screen denying egress of oversize material

Definitions

  • scrap material resulting after the molding operation is recycled by first cutting it into small pieces and then it is fed into extruders for further molding operations.
  • scrap material is fed through machines called granulators which cut the material into small pieces of particulate size.
  • Such machines are generally provided with two stationary bed knives positioned around the cutting circle of a rotary cutting knife (generally plural bladed).
  • the material to be cut up is fed into the machine where it is cut by the first bed knife.
  • Between the first and second bed knife there is provided a screen which will pass material which has been cut small enough to meet the customersrequirements.
  • -A material which is'not cut small enough to pass through the screen is moved by the rotor to the second bed knife,
  • the cut material is then conveyed by the rotary action of the rotary cutting knives over the top of the rotor to the first bed knife, where it is cut again. It then moves to the screen lying between the two bed knives.
  • One object of the invention is the provision of cutting means for cutting plastic scrap which provides a wide throat for the introduction of large bulky pieces of scrap into the cutting mechanism.
  • Another object of the invention is the provision of apparatus of the above kind, in which the output of the machine is in the order of 50 percent more than the output of conventional machines of similar size on the market.
  • Still another object of the invention is the provision of machines of the above kinds, in which means are provided for the minimizing of particulate material which is finer than desired by the user.
  • Yet another object of the invention is the provision of machines of any of the above kinds, which are easy to make, use standard components for the most part, and which reliably and sufficiently perform their required operation.
  • Still another object of the invention is the provision of machines of the above kinds which run cooler and safer than conventional machines.
  • FIG. 1 is an illustration showing generally and somewhat schematically the entire machine
  • F IG. 2 is an end elevation of a portion of the machine in schematic form given to show the critical parts of the invention.
  • FIG. 1 there is shown a cutting machine, oftentimes called a granulator, of this invention, the machine generally comprising a base 2 having an opening 4 for receiving a hopper 5 to collect cut particles.
  • the cutting portion 6 of the machine is mounted on ,the base and is driven by the motor 8 in conventional manner.
  • a vertical feed chute 10 is mountedon top of the granulator for feeding materials thereinto by gravity.
  • Chute 10 is shown leading to the granulator mechanism itself.
  • the latter comprises a rotor 12 mounted on conventional bearings and adapted to be driven by the motor 8, the bearings, pul-- ley and motor not being shown in'this drawing.
  • On the rotor 12 are mounted the fly knives 14 and 16 which are fastened thereto in the usual manner, for example, by means of the bolts 18. Sincethe construction of the rotary knife system is well known in the art, no further description will be given here. It will be noted that the cutting edge of the rotary knives traverses the usual circle indicated by dot and dash line 20.
  • a support member 24 Fastened securely to the granulator framework 22 is a support member 24, and fastened to the side of the chute (or preferably to the frame of the machine) finnly is another support member 26. Also fastened to the granulator frame is'a third support member 28. Supports 24 and 28 must be rigid and strong because they support bed knives as described below.
  • first adjustable bed knife 32 Fastened rigidly but adjustably to the support 28 by means of the usual bolts 30 is a first adjustable bed knife 32.
  • F astened rigidly but adjustably to the support 24 by means of the bolts 34 is the second bed knife 36.
  • the bolts 30 draw a clamping member 38 down against the bed knife so as to clamp the latter securely to the support 28.
  • the bolts 34 draw the clamping member 40 tightly against the bed knife so as to clamp the latter securely against the support 24.
  • Bed knife 32 is generally below the axis of the rotor 12, and bed knife 36 is positioned between 135 and l80 away from the knife 32around the cutting circle 20.
  • a first screen 42 provided with the openings 44 of a predetermined size is fastened by means of the outwardly turned edges 45 of the screens and bolts 46 to the supports 26 and 28. It will be understood that the screen 42 extends the full length of the rotor 12, the fly knives 14 and the bed knives 32 and 36.
  • the screen 42 is adjacent the bed knife 32 but to one side thereof, and in addition is located in general at the bottom portion of the chute 10.
  • the clamp 38 is provided with a slot 48 extending its full length, and welded or otherwise fastened to the inner front edge of the slot is a rod or abutment 50 which partially closes this entrance. If desired, of course, the clamping means 38 could be milled from solid material so that the narrowed slot entrance could be provided integrally.
  • holes 52 which are aligned with the bolts 30 in order to provide access to these bolts.
  • a second screen 56 having holes 58 of predetermined size is mounted between the supports 24 and 28 as follows:
  • the screen has outwardly turned edges 60 and 62.
  • the edge 60 is inserted in the slot 48 and then when the screen is turned upwardly as viewed) to bring the turned edge 62 against the clamp 40, this will rotate the edge 60 so that it is firmly engaged by the entrancenarrowing abutment or rod 50.
  • Edge 62 is secured against the face of the clamp 40 by means of the bolts 64.
  • holes 44 in screen 42' and holes-58 in screen 56 will be the same size.
  • the material to be cut is fed by gravity to the cutting mechanism in the direction'indicated by the arrows 70 and it will be noted that because screen 42 (the first screen) is adjacent the entrance of the granulator proper, any particles which are already of a size t pass through the openings 44 will do so, and without being further cut will fall in the direction of the arrows 70 and through the usual opening 73 provided below the granulator and into the hopper 5.
  • the material which does not pass through the openings 44 then enters the first cutting means which comprises the combination of bed knife 32 and the rotor knives 14 and 16.
  • the material is then cut by this first cutting means, and a portion theereof will be small enough to pass through the openings 58 of screen 56 to emerge therefrom in the direction indicated by arrows 74 and thus fall downwardly into the hopper 5.
  • Any material which does not pass through the openings 58 will be moved by the rotation of rotor 12 and the knives l4 and 16 to the throat at the entrance of the second cutting means comprising the rotary knives 14, 16 and the bed knife 36.
  • the oversized material will then be cut by this second cutting means, and having been cut will then be conveyed by the rotation of the rotor over to the throat of the first cutting means (14, 32). As it.
  • Test I general purpose polystyrene tape cartridge cases were granulated into (a) a standard single screen machine and (b) the twoscreen machine of this invention.
  • the screen holes of the screens used in the standard granulator and in the granulator of this invention were 5/16 of an inch in diameter. Each machine was fed for two minutes and then allowed to clean out for 30 seconds. The results are as follows:
  • Test I Machine Standard single screen Machine of this invention Output 13 lbs. of material 19 lbs. of material Machine of this invention also produced a cleaner cut
  • fly knives there could be more fly knives than the two shown. In general, not more than five such fly knives should be used, and the number will depend upon the size of the scrap being charged into the machine. For very large bulky pieces, two knives are preferred, whereas for smaller pieces a large number of knives can be used.
  • the hole size in the screens will depend upon the users requirements as to a final product. In conventional practice, the hole sizes generally lie within the range of A inch to inches. The hole size does not play a part in this invention.
  • the machine of this invention is operated no differently than is a conventional machine.
  • the rotor speed is the same as in the case of the single screen machine.
  • the rotor 12 and its fly knives were approximately 12 inches long, and the cutting circle itfvvas approximately 11 inches in diameter.
  • the bed knives 32 and 36 were, of course, the same length as the knives l4 and 16 (that is, 12 inches approximately).
  • the speed of operating the'machine during the above tests was 600 rpm.
  • Apparatus as set forth in claim 1 including an opening below the rotor means and the first and second screens in position to receive material passing through said screens.
  • Apparatus as set forth in claim 1 including means for adjusting said bed knives relative to said rotor knives.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US00200130A 1971-11-18 1971-11-18 Granulator Expired - Lifetime US3790093A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20013071A 1971-11-18 1971-11-18

Publications (1)

Publication Number Publication Date
US3790093A true US3790093A (en) 1974-02-05

Family

ID=22740460

Family Applications (1)

Application Number Title Priority Date Filing Date
US00200130A Expired - Lifetime US3790093A (en) 1971-11-18 1971-11-18 Granulator

Country Status (8)

Country Link
US (1) US3790093A (fr)
JP (1) JPS4863381A (fr)
BE (1) BE791555A (fr)
CA (1) CA986899A (fr)
DE (1) DE2256524A1 (fr)
FR (1) FR2170395A5 (fr)
GB (1) GB1416192A (fr)
IT (1) IT972255B (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897016A (en) * 1974-03-27 1975-07-29 Cumberland Eng Co Granulator with noise abatement and safety means
US3934826A (en) * 1974-06-05 1976-01-27 American Pulverizer Company Coal crusher
US4028779A (en) * 1975-12-17 1977-06-14 Leesona Corporation Film granulator
US4098181A (en) * 1975-09-12 1978-07-04 Eduard August Schultz Disposal installation for domestic waste
DE2814535A1 (de) * 1978-04-04 1979-10-18 Dow Badische Co Vorrichtung zum zerkleinern oder granulieren von polymerem oder aehnlichem material
US4566641A (en) * 1981-05-22 1986-01-28 Ngk Insulators, Ltd. Sheet breaking apparatus
US4657192A (en) * 1984-06-01 1987-04-14 Browning James N Paper shredder
US5071080A (en) * 1990-02-27 1991-12-10 Fellowes Manufacturing Company Document shredding machine
US5295633A (en) * 1992-01-13 1994-03-22 Fellowes Manufacturing Company Document shredding machine with stripper and cutting mechanism therefore
ES2054575A2 (es) * 1992-05-12 1994-08-01 Cirera Juan Simon Perfeccionamientos introducidos en los molinos trituradores de tuberia plastica.
US5372317A (en) * 1991-08-08 1994-12-13 Willis; W. Coy Apparatus for recycling glass containers
US5636801A (en) * 1995-08-02 1997-06-10 Fellowes Mfg. Co. One piece molded stripper for shredders
US5655725A (en) * 1995-08-24 1997-08-12 Fellowes Manufacturing Co. Retaining plate for gearing
US5676321A (en) * 1995-04-03 1997-10-14 Fellowes Mfg. Co. Cutting disk
WO1998020977A1 (fr) * 1996-11-14 1998-05-22 Xinguo Yu Broyeur a marteaux
US5829697A (en) * 1995-08-24 1998-11-03 Fellowes Manufacturing Company Support for cylinders in a paper shredder
US20100078510A1 (en) * 2006-11-17 2010-04-01 Precimeca Waste comminuting device
US20110147504A1 (en) * 2009-12-23 2011-06-23 Vecoplan Ag Shredding Device with Counter Knife Assembly
USD772317S1 (en) 2015-04-01 2016-11-22 Zenith Cutter, Inc. Knife insert
USD772316S1 (en) 2015-04-01 2016-11-22 Zenith Cutter, Inc. Knife assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008132435A (ja) * 2006-11-28 2008-06-12 Nt Techno Corp 切粉破砕装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1666797A (en) * 1927-08-10 1928-04-17 Sprout Waldron And Company Grain-cracking machine
US2343270A (en) * 1941-08-23 1944-03-07 Charles E Agnew Preparation of return material
US2509242A (en) * 1945-09-19 1950-05-30 Daniel W Miller Hammer mill type garbage grinder
CA558654A (fr) * 1958-06-10 Spragg Harry Broyage de roche avec pieces de coupage relativement mobiles
DE1073924B (de) * 1960-01-21 Arno Andreas Hannover Verwendung einer Prallmühle mit schnell rotierendem Laufer zum Separieren und Schlammen von Kreide od dgl
US2922585A (en) * 1956-01-24 1960-01-26 Lester U Searfoss Treating used submerged arc welding flux
US3419223A (en) * 1966-12-23 1968-12-31 Nelson H. Morin Granulators
US3561685A (en) * 1968-01-31 1971-02-09 Wedco Center fed mill with arcuate discharge screens
US3630458A (en) * 1969-02-10 1971-12-28 Lloyd D Smiley Turbopulp refining blender and classifier

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA558654A (fr) * 1958-06-10 Spragg Harry Broyage de roche avec pieces de coupage relativement mobiles
DE1073924B (de) * 1960-01-21 Arno Andreas Hannover Verwendung einer Prallmühle mit schnell rotierendem Laufer zum Separieren und Schlammen von Kreide od dgl
US1666797A (en) * 1927-08-10 1928-04-17 Sprout Waldron And Company Grain-cracking machine
US2343270A (en) * 1941-08-23 1944-03-07 Charles E Agnew Preparation of return material
US2509242A (en) * 1945-09-19 1950-05-30 Daniel W Miller Hammer mill type garbage grinder
US2922585A (en) * 1956-01-24 1960-01-26 Lester U Searfoss Treating used submerged arc welding flux
US3419223A (en) * 1966-12-23 1968-12-31 Nelson H. Morin Granulators
US3561685A (en) * 1968-01-31 1971-02-09 Wedco Center fed mill with arcuate discharge screens
US3630458A (en) * 1969-02-10 1971-12-28 Lloyd D Smiley Turbopulp refining blender and classifier

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897016A (en) * 1974-03-27 1975-07-29 Cumberland Eng Co Granulator with noise abatement and safety means
US3934826A (en) * 1974-06-05 1976-01-27 American Pulverizer Company Coal crusher
US4098181A (en) * 1975-09-12 1978-07-04 Eduard August Schultz Disposal installation for domestic waste
US4028779A (en) * 1975-12-17 1977-06-14 Leesona Corporation Film granulator
US4069981A (en) * 1975-12-17 1978-01-24 Leesona Corporation Method of feeding a film granulator
DE2814535A1 (de) * 1978-04-04 1979-10-18 Dow Badische Co Vorrichtung zum zerkleinern oder granulieren von polymerem oder aehnlichem material
US4566641A (en) * 1981-05-22 1986-01-28 Ngk Insulators, Ltd. Sheet breaking apparatus
US4657192A (en) * 1984-06-01 1987-04-14 Browning James N Paper shredder
US5071080A (en) * 1990-02-27 1991-12-10 Fellowes Manufacturing Company Document shredding machine
US5423492A (en) * 1991-08-08 1995-06-13 Willis; W. Coy Apparatus for recycling glass containers
US5372317A (en) * 1991-08-08 1994-12-13 Willis; W. Coy Apparatus for recycling glass containers
US5295633A (en) * 1992-01-13 1994-03-22 Fellowes Manufacturing Company Document shredding machine with stripper and cutting mechanism therefore
ES2054575A2 (es) * 1992-05-12 1994-08-01 Cirera Juan Simon Perfeccionamientos introducidos en los molinos trituradores de tuberia plastica.
US5676321A (en) * 1995-04-03 1997-10-14 Fellowes Mfg. Co. Cutting disk
US5636801A (en) * 1995-08-02 1997-06-10 Fellowes Mfg. Co. One piece molded stripper for shredders
US5829697A (en) * 1995-08-24 1998-11-03 Fellowes Manufacturing Company Support for cylinders in a paper shredder
US5655725A (en) * 1995-08-24 1997-08-12 Fellowes Manufacturing Co. Retaining plate for gearing
WO1998020977A1 (fr) * 1996-11-14 1998-05-22 Xinguo Yu Broyeur a marteaux
US6330982B1 (en) 1996-11-14 2001-12-18 Xin Guo Yu Hammer mill
US20100078510A1 (en) * 2006-11-17 2010-04-01 Precimeca Waste comminuting device
US20110147504A1 (en) * 2009-12-23 2011-06-23 Vecoplan Ag Shredding Device with Counter Knife Assembly
US8434705B2 (en) * 2009-12-23 2013-05-07 Vecoplan Ag Shredding device with counter knife assembly
USD772317S1 (en) 2015-04-01 2016-11-22 Zenith Cutter, Inc. Knife insert
USD772316S1 (en) 2015-04-01 2016-11-22 Zenith Cutter, Inc. Knife assembly

Also Published As

Publication number Publication date
IT972255B (it) 1974-05-20
FR2170395A5 (fr) 1973-09-14
GB1416192A (en) 1975-12-03
CA986899A (en) 1976-04-06
BE791555A (fr) 1973-03-16
DE2256524A1 (de) 1973-05-30
JPS4863381A (fr) 1973-09-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: JOHN BROWN INDUSTRIES LTD.; 100 WEST TENTH ST., WI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LEESONA CORPORATION; 333 STRAWBERRY FIELD RD., WARWICK, RI. A CORP. OF MA.;REEL/FRAME:003936/0206

Effective date: 19810501

AS Assignment

Owner name: LEESONA CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:JOHN BROWN INDUSTRIES LTD.;REEL/FRAME:003936/0238

Effective date: 19810331