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US3097451A - Blast machine system and method - Google Patents

Blast machine system and method Download PDF

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US3097451A
US3097451A US3097451DA US3097451A US 3097451 A US3097451 A US 3097451A US 3097451D A US3097451D A US 3097451DA US 3097451 A US3097451 A US 3097451A
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blast
machine
separator
media
discharge
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/006—Removing cores by abrasive, water or air blasting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/006—Treatment of used abrasive material
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • This invention relates to blast machine systems such as are used to clean up castings or other semi-finished workpiecesj and more particularly to an improved system having ad alternative blast media cycling arrangement whereby contaminant accumulations may be from time to time purged from the system, such as after each heavy sand loading cycle of operation thereof.
  • the blast machine may be at all times more efiiciently employed to perform on castings or other workpieces, rough cleaning and finish clean-up processes.
  • the present invention contemplates, in a blast machine system, meansfor selectively dumping such accumulations through ia by-pass conduit to an intermediate stor age hopperzend thence to the system separator, thereby by-passing ih blast machine and protecting the latter ar and otherwise inefficient operation.
  • a primary object of the present invention is to provide in a gflast machine system, means for eiiiciently by-passing contaminant accumulations and recycling them 'gneparator, whereby to reduce the blast ma- Other objects and to the accompanying drawing wherein:
  • FIG. 1 is apogxewhat schematic elevational view of one form of system of the invention.
  • FIG. 2 is a fragmentary sectional view through a feed hopper component of the system, illustrating undesirable accumulationslserverrein.
  • a blast machine system embodying the imtion may comprise generally a tumble blast unit ld ineluding a candle type conveyor 12 of table or the which supports and tumbles a load of processed, such as are indicated
  • a shot throwing machine 16 is disposed above the load of castings and operates pieces, as is wehfienown in the art.
  • debris circulating and separation system such as may include the conveyor 22 shown as discharging the debris an an abrasive mixture from machine 10 to the foot of an elevator 24. Elevator 24 delivers pending U.S. patent application Serial August 4, 1959. refuse discharge spout 30 delivering into any suitable separator delivers into the hopper 18. A control valve as shown at 38 is disposed in the feed line to the abrasive throwing machine 16.
  • the door of the machine is then closed and the castings are tumbled and/or turned while the unit 16 is activated with the valve 38 open so that the blast operation dislodges sand and/or surface scale or other debris from the workpieces.
  • the contaminated abrasive cycles through the separator so that the dislodged sand and scale and is loaded by any Also, this will impose undue Wear upon the blast machine parts.
  • a separate bypass conduit or conveyor as indicated at 40 to permit periodic dumping" of the entire contents of the hopper 18.
  • the chute 40 leads to a 24, which in turn leads the chute 40 being controlled by a capacity of the separator; the separator functioning to discard from the system the worn-out blast media and fine debris from the mixture.
  • hopper 42 empefficiency; outlined above may be performed either manually or au- 1.
  • a unit machine system for blast-cleaning workpieces said machine system including a workpiece receiving device adapted to turn the workpiece, a blast machine arranged to bombard the workpiece as it is turned, a feed hopper delivering blast media to said blast machine, a separator receiving contaminated blast media residual to the blasting operation, said separator having a debris discharge and a reusable blast media discharge separate therefrom, said reusable blast media discharge delivering to said feed hopper, a by-pass conveyor returning from said feed hop per to an intermediate storage hopper arranged to discharge to said separator intake, a first valve controlling passage through said by-pass conveyor, a second valve controlling passage from said storage hopper to said separator, a third valve controlling passage to said blast machine, said valves being selectively actuatable so as to either block passage of blast media through said blast machine while causing circulation of all material in the system through said separator, or to cause recycling of the reusable blast media through said feeder hopper and said blast machine against said workpieces.
  • a unit machine system for blast-cleaning workpieces said machine system including a workpiece receiving device adapted to turn the workpiece, a blast machine arranged to bombard the workpiece as it is turned, a feed hopper delivering blast media to said blast machine, a separator receiving contaminated blast media residual to the blasting operation, said separator having a debris discharge and a reusable blast media discharge separate therefrom, said reusable blast media discharge delivering to said feed hopper, a bypass conveyor returning from said feed hopper to an intermediate storage hopper arranged to discharge to said separator intake, a first valve controlling passage through said bypass conveyor, a second valve controlling passage from said storage hopper to said separator, a third valve controlling passage to said blast machine, said valves being selectively actuatable.
  • a unit machine for cleaning out cores and heavy surface debris from castings and then finish-cleaning the same comprising, a casting reeciving device adapted to turn the castings, an airless blast device arranged to throw loose blast media at the castings as they are turned, a feeder delivering media to said blast device, a separator receiving debris and spent media falling away from said castings, said separator having a debris discharge and a reusable media discharge separate therefrom, said reusable media discharge delivering to a hopper above said feeder, a bypass conduit interconnecting said hopper and said separator intake, a first valve controlling passage through said bypass conduit, a second valve controlling passage through said feeder, and control means operable to alternatively set said valves so as to block passage of blast media through said feeder while circulating all material falling away from said castings through said separator and alternatively cycling the reusable media therefrom through said feeder and said blast device against said castings.
  • a unit machine for sequentially knocking out hard to dislodge cores form castings and then finish-cleaning the same comprising, a casting receiving device adapted to tumble the castings, a blast device arranged to throw blast media at the castings as they are tumbled, a feeder delivering blast media to said blast device, a sep arator receiving debris and spent media falling away from said castings, said separator having a debris discharge and a reusable media discharge separate therefrom, said reusable media discharge normally delivering to said feeder, a bypass conveyor returning from said media discharge to said separator intake, a first valve controlling passage through said bypass conveyor, a second valve controlling passage through said feeder, and control means operable to sequentially control said valves so as to initially block passage of media through said feeder while circulating all material falling away from said casting through said separator and subsequently cycling the reusable media therefrom through said feeder and said blast device against said casting.
  • a unit machine for cleaning out cores and heavy surface debris from castings comprising, a casting receiving device adapted to tumble the castings, an airless blast device arranged to throw loose blast media at the castings as they are tumbled, a feeder delivering media to said blast device, a separator receiving debris and spent media falling away from said castings, said separator having a debris discharge and a reusable media discharge separate therefrom, said reusable media discharge delivering to a hopper above said feeder, a bypass conduit leading away from the bottom of said hopper and a valve controlling passage through said by-pass conduit and operable so as to initially block passage of material through said bypass conduit while circulating all material falling away from said castings through said separator and subsequently cycling the reusable media therefrom through said feeder and said blast device against said castings.
  • a method of cleaning castings and for segregating usable blast media and debris from a system including a blast machine operating on castings and a hopper feeding and said machine with blast media comprises placing a casting requiring to be cleaned on a support arranged to turn said casting for shaking out the foundry core material and other loose debris while conveying said debris to a separator having a debris discharge and a cleaned blast media discharge delivering to said hopper, then shot-blasting said casting while it is being tumbled to remove residual core and surface material and delivering the spent shot and debris materials to said separator while periodically bypassing the accumulations within said hopper back to said separator, whereby accumulations of fine debris in said hopper may be periodically dumped to purge the system thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)

Description

y 1963 A. H. FREEMAN ETAL BLAST MACHINE sysmm AND METHOD Filed May 11, 1962 FIGI INVENTORS ARDEE H FREEMAN FREDERQCK J. PICHARD 05m, M, @944 M M ATTORNEYS This invention relates to blast machine systems such as are used to clean up castings or other semi-finished workpiecesj and more particularly to an improved system having ad alternative blast media cycling arrangement whereby contaminant accumulations may be from time to time purged from the system, such as after each heavy sand loading cycle of operation thereof. In consequence the blast machine may be at all times more efiiciently employed to perform on castings or other workpieces, rough cleaning and finish clean-up processes.
Previousiy, because of the greatly variable sand loads incident for-example to core knockout and rough cleaning and f nish-cleaning operations, shot blast machine systems haste been found propense to accumulating at various stations therein concentrations of harmful percentages of sand and debris contents, which accumulations on occasion dislodge and then flood the blast machine with intolerable surges of debris. Such tendency invariably exists for example in the feed hopper located just above blast machine feed inlet.
The present invention contemplates, in a blast machine system, meansfor selectively dumping such accumulations through ia by-pass conduit to an intermediate stor age hopperzend thence to the system separator, thereby by-passing ih blast machine and protecting the latter ar and otherwise inefficient operation. It
that only slight increases of sand percentt shot and sand mixture will cause tremendous wear-of the blast machine centrifugai wheel and liners etc., asiwell as reducing the blasting efiiciency of the machine;
Thus, a primary object of the present invention is to provide in a gflast machine system, means for eiiiciently by-passing contaminant accumulations and recycling them 'gneparator, whereby to reduce the blast ma- Other objects and to the accompanying drawing wherein:
FIG. 1 is apogxewhat schematic elevational view of one form of system of the invention; and
FIG. 2 is a fragmentary sectional view through a feed hopper component of the system, illustrating undesirable accumulationsliilerein.
As shown iggflle drawing, a blast machine system embodying the imtion may comprise generally a tumble blast unit ld ineluding a candle type conveyor 12 of table or the which supports and tumbles a load of processed, such as are indicated A shot throwing machine 16 is disposed above the load of castings and operates pieces, as is wehfienown in the art. With a view to simplification of this specification the tumble blast and abrasive throwing machine components will not be illustrated and described in detail; the details of construction and operation of typical examples thereof being fully disclosed and explained Patents 2,104,055 and 2,819,562. However, it is tof h'e understood that in lieu of the specific forms of workpiece supporting and tumbling and shot throwing devices'f il lustrated herein and disclosed in the referenced patents, any other suitable forms of equipment may be employed, such as for example swing table machines as disclosed in US. patent application S.N.
ted States Patent 14,903, filed March 14, 1960, by Alfred Schnetzer, now Patent No. 3,041,786. The hopper and feed chute for supplying abrasive to the unit 16 are indicated at 18 and 20, respectively, and the conveyor for carrying away spent abrasive and debris is indicated at 22.
debris circulating and separation system such as may include the conveyor 22 shown as discharging the debris an an abrasive mixture from machine 10 to the foot of an elevator 24. Elevator 24 delivers pending U.S. patent application Serial August 4, 1959. refuse discharge spout 30 delivering into any suitable separator delivers into the hopper 18. A control valve as shown at 38 is disposed in the feed line to the abrasive throwing machine 16.
After each batch of castings or the like suitable means into the blast machine the door of the machine is then closed and the castings are tumbled and/or turned while the unit 16 is activated with the valve 38 open so that the blast operation dislodges sand and/or surface scale or other debris from the workpieces. During this process the contaminated abrasive cycles through the separator so that the dislodged sand and scale and is loaded by any Also, this will impose undue Wear upon the blast machine parts.
To avoid the diificulties and disadvantages referred to, we provide a separate bypass conduit or conveyor as indicated at 40 to permit periodic dumping" of the entire contents of the hopper 18. The chute 40 leads to a 24, which in turn leads the chute 40 being controlled by a capacity of the separator; the separator functioning to discard from the system the worn-out blast media and fine debris from the mixture. When hopper 42 is empefficiency; outlined above may be performed either manually or au- 1. A unit machine system for blast-cleaning workpieces, said machine system including a workpiece receiving device adapted to turn the workpiece, a blast machine arranged to bombard the workpiece as it is turned, a feed hopper delivering blast media to said blast machine, a separator receiving contaminated blast media residual to the blasting operation, said separator having a debris discharge and a reusable blast media discharge separate therefrom, said reusable blast media discharge delivering to said feed hopper, a by-pass conveyor returning from said feed hop per to an intermediate storage hopper arranged to discharge to said separator intake, a first valve controlling passage through said by-pass conveyor, a second valve controlling passage from said storage hopper to said separator, a third valve controlling passage to said blast machine, said valves being selectively actuatable so as to either block passage of blast media through said blast machine while causing circulation of all material in the system through said separator, or to cause recycling of the reusable blast media through said feeder hopper and said blast machine against said workpieces.
2. A unit machine system for blast-cleaning workpieces, said machine system including a workpiece receiving device adapted to turn the workpiece, a blast machine arranged to bombard the workpiece as it is turned, a feed hopper delivering blast media to said blast machine, a separator receiving contaminated blast media residual to the blasting operation, said separator having a debris discharge and a reusable blast media discharge separate therefrom, said reusable blast media discharge delivering to said feed hopper, a bypass conveyor returning from said feed hopper to an intermediate storage hopper arranged to discharge to said separator intake, a first valve controlling passage through said bypass conveyor, a second valve controlling passage from said storage hopper to said separator, a third valve controlling passage to said blast machine, said valves being selectively actuatable.
3. A unit machine for cleaning out cores and heavy surface debris from castings and then finish-cleaning the same, said machine comprising, a casting reeciving device adapted to turn the castings, an airless blast device arranged to throw loose blast media at the castings as they are turned, a feeder delivering media to said blast device, a separator receiving debris and spent media falling away from said castings, said separator having a debris discharge and a reusable media discharge separate therefrom, said reusable media discharge delivering to a hopper above said feeder, a bypass conduit interconnecting said hopper and said separator intake, a first valve controlling passage through said bypass conduit, a second valve controlling passage through said feeder, and control means operable to alternatively set said valves so as to block passage of blast media through said feeder while circulating all material falling away from said castings through said separator and alternatively cycling the reusable media therefrom through said feeder and said blast device against said castings.
4. A unit machine for sequentially knocking out hard to dislodge cores form castings and then finish-cleaning the same, said machine comprising, a casting receiving device adapted to tumble the castings, a blast device arranged to throw blast media at the castings as they are tumbled, a feeder delivering blast media to said blast device, a sep arator receiving debris and spent media falling away from said castings, said separator having a debris discharge and a reusable media discharge separate therefrom, said reusable media discharge normally delivering to said feeder, a bypass conveyor returning from said media discharge to said separator intake, a first valve controlling passage through said bypass conveyor, a second valve controlling passage through said feeder, and control means operable to sequentially control said valves so as to initially block passage of media through said feeder while circulating all material falling away from said casting through said separator and subsequently cycling the reusable media therefrom through said feeder and said blast device against said casting.
5. A unit machine for cleaning out cores and heavy surface debris from castings, said machine comprising, a casting receiving device adapted to tumble the castings, an airless blast device arranged to throw loose blast media at the castings as they are tumbled, a feeder delivering media to said blast device, a separator receiving debris and spent media falling away from said castings, said separator having a debris discharge and a reusable media discharge separate therefrom, said reusable media discharge delivering to a hopper above said feeder, a bypass conduit leading away from the bottom of said hopper and a valve controlling passage through said by-pass conduit and operable so as to initially block passage of material through said bypass conduit while circulating all material falling away from said castings through said separator and subsequently cycling the reusable media therefrom through said feeder and said blast device against said castings.
6. A method of cleaning castings and for segregating usable blast media and debris from a system including a blast machine operating on castings and a hopper feeding and said machine with blast media, which method comprises placing a casting requiring to be cleaned on a support arranged to turn said casting for shaking out the foundry core material and other loose debris while conveying said debris to a separator having a debris discharge and a cleaned blast media discharge delivering to said hopper, then shot-blasting said casting while it is being tumbled to remove residual core and surface material and delivering the spent shot and debris materials to said separator while periodically bypassing the accumulations within said hopper back to said separator, whereby accumulations of fine debris in said hopper may be periodically dumped to purge the system thereof.
References Cited in the file of this patent UNITED STATES PATENTS 2,104,055 Peik Jan. 4, 1938 2,305,451 Turnbull Dec. 15, 1942 2,424,955 Potter July 29, 1947 2,440,819 Evans May 4, 1948 2,449,745 Jewell Sept. 21, 1948

Claims (1)

1. A UNIT MACHINE SYSTEM FOR BLAST-CLEANING WORKPIECES, SAID MACHINE SYSTEM INCLUDING A WORKPIECE RECEIVING DEVICE ADAPTED TO TURN THE WORKPIECE MACHINE ARRANGED TO BOMBARD THE WORKPIECE AS IT IS TURNED, A FEED HOPPER DELIVERING BLAST MEDIA TO SAID BLAST MACHINE, A SEPARATOR RECEIVING CONTAMINATED BLAST MEDIA RESIDUAL TO THE BLASTING OPERATION, SAID SEPARATOR HAVING A DEBRIS DISCHARGE AND A REUSABLE BLAST MEDIA DISCHARGE SEPARATE THEREFROM, SAID REUSABLE BLAST MEDIA DISCHARGE DELIVERING TO SAID FEED HOPPER, A BY-PASS CONVEYOR RETURNING FROM SAID FEED HOPPER TO AN INTERMEDIATE STORAGE H OPPER ARRANGED TO DISCHARGE TO SAID SEPARATOR INTAKE, A FIRST VALVE CONTROLLING PASSAGE THROUGH SAID BY-PASS CONVEYOR, A SECOND VALVE CONTROLLING PASSAGE FROM SAID STORAGE HOPPER TO SAID SEPARATOR, A THIRD VALVE CONTROLLING PASSAGE TO SAID BLAST MACHINE, SAID VALVES BEING SELECTIVELY ACTUATABLE SO AS TO EITHER BLOCK PASSAGE OF BLAST MEDIA THROUGH SAID BLAST MACHINE WHILE CAUSING CIRCULATION OF ALL MATERIAL IN THE SYSTEM THROUGH SAID SEPARATOR, OR TO CAUSE RECYCLING OF THE REUSABLE BLAST MEDIA THROUGH SAID FEEDER HOPPER AND SAID BLAST MACHINE AGAINST SAID WORKPIECES.
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438229A (en) * 1966-04-25 1969-04-15 Eaton Yale & Towne Stress peening steel articles
US3540156A (en) * 1967-12-13 1970-11-17 Wheelabrator Corp Machine for cleaning sand castings and recovery of components
US3694964A (en) * 1970-11-13 1972-10-03 Carborundum Co Abrasive blast cleaning system
US3716947A (en) * 1971-01-21 1973-02-20 Carborundum Co Abrasive blast cleaning system
US3829029A (en) * 1971-01-21 1974-08-13 Carborundum Co Abrasive blast cleaning system
DE2451775A1 (en) * 1973-11-02 1975-05-07 Luria Brothers & Co Inc PROCESS FOR EXTRACTION OF RELATIVELY PURE METAL AND PRODUCT CONSISTING OF THIS METAL
US4037364A (en) * 1969-10-13 1977-07-26 Wheelabrator-Frye, Inc. Method and means for continuous surface treatment
US4044507A (en) * 1976-05-12 1977-08-30 Silver Creek Minerals Corporation Method and apparatus for stripping, cleaning and treating surfaces
US4113008A (en) * 1976-03-26 1978-09-12 Ludwig Taprogge, Reinigungsanlagen Fur Rohren-Warmeaustauscher Apparatus for separating cleaning elements from a fluid
US4175412A (en) * 1977-03-11 1979-11-27 Trefilunion Process and installation for mechanical descaling steel wire
US4449331A (en) * 1981-03-17 1984-05-22 Tiglhman Wheelabrator Limited Shot blasting machinery
FR2603220A1 (en) * 1986-08-15 1988-03-04 Cherepovetsky Sev Zapa LAMINATE DECALAMINATION PLANT.
US4804190A (en) * 1987-06-15 1989-02-14 Hofmann Elsa O Outer space travelling board game

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2104055A (en) * 1933-08-23 1938-01-04 American Foundry Equip Co Abrading apparatus
US2305451A (en) * 1940-05-17 1942-12-15 American Foundry Equip Co Apparatus for treating metal articles
US2424955A (en) * 1944-09-26 1947-07-29 Pangborn Corp Tumbling mill
US2440819A (en) * 1944-03-09 1948-05-04 Pangborn Corp Tumbling mill
US2449745A (en) * 1947-04-01 1948-09-21 Walter E Jewell Shot blasting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2104055A (en) * 1933-08-23 1938-01-04 American Foundry Equip Co Abrading apparatus
US2305451A (en) * 1940-05-17 1942-12-15 American Foundry Equip Co Apparatus for treating metal articles
US2440819A (en) * 1944-03-09 1948-05-04 Pangborn Corp Tumbling mill
US2424955A (en) * 1944-09-26 1947-07-29 Pangborn Corp Tumbling mill
US2449745A (en) * 1947-04-01 1948-09-21 Walter E Jewell Shot blasting machine

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438229A (en) * 1966-04-25 1969-04-15 Eaton Yale & Towne Stress peening steel articles
US3540156A (en) * 1967-12-13 1970-11-17 Wheelabrator Corp Machine for cleaning sand castings and recovery of components
US4037364A (en) * 1969-10-13 1977-07-26 Wheelabrator-Frye, Inc. Method and means for continuous surface treatment
US3694964A (en) * 1970-11-13 1972-10-03 Carborundum Co Abrasive blast cleaning system
US3716947A (en) * 1971-01-21 1973-02-20 Carborundum Co Abrasive blast cleaning system
US3829029A (en) * 1971-01-21 1974-08-13 Carborundum Co Abrasive blast cleaning system
US3883997A (en) * 1973-11-02 1975-05-20 Luria Brothers & Co Inc Process for producing high-grade metallic products from solid slags and high-grade metallic products
DE2451775A1 (en) * 1973-11-02 1975-05-07 Luria Brothers & Co Inc PROCESS FOR EXTRACTION OF RELATIVELY PURE METAL AND PRODUCT CONSISTING OF THIS METAL
US4113008A (en) * 1976-03-26 1978-09-12 Ludwig Taprogge, Reinigungsanlagen Fur Rohren-Warmeaustauscher Apparatus for separating cleaning elements from a fluid
US4044507A (en) * 1976-05-12 1977-08-30 Silver Creek Minerals Corporation Method and apparatus for stripping, cleaning and treating surfaces
US4175412A (en) * 1977-03-11 1979-11-27 Trefilunion Process and installation for mechanical descaling steel wire
US4449331A (en) * 1981-03-17 1984-05-22 Tiglhman Wheelabrator Limited Shot blasting machinery
FR2603220A1 (en) * 1986-08-15 1988-03-04 Cherepovetsky Sev Zapa LAMINATE DECALAMINATION PLANT.
US4804190A (en) * 1987-06-15 1989-02-14 Hofmann Elsa O Outer space travelling board game

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