US3857202A - Device for surface sandblasting by metal grit or the like - Google Patents

Device for surface sandblasting by metal grit or the like Download PDF

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Publication number
US3857202A
US3857202A US00386700A US38670073A US3857202A US 3857202 A US3857202 A US 3857202A US 00386700 A US00386700 A US 00386700A US 38670073 A US38670073 A US 38670073A US 3857202 A US3857202 A US 3857202A
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United States
Prior art keywords
screw
casing
impeller
grit
motor
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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
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US00386700A
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English (en)
Inventor
A Cavallucci
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes

Definitions

  • the device comprises a tubular body and internally of said body a rotating distributor supplying the grit to a rotor projecting the grit against the surface to be processed.
  • This invention relates to a device for sandblasting by metal grit or the like on surfaces that can be of various type and, for example, on inner surfaces of tubes or plates.
  • a device for sandblasting by metal grit or the like is essentially characterized by comprising a tubularbody, internally of which a rotating member or distributor is provided as operated by a corresponding motor, means for introducing the grit into said tubular body, and a rotor or impeller including blades to which said grit is supplied as projected by said distributor through openings or slits formed in said tubular body, a second motor being provided for driving said impeller, so that the speed of the latter can be adjusted independently of the speed of said distributing member.
  • FIG. 2 is a sectional view taken on line lI-ll of FIG.
  • a device comprises an Archimediam screw, designated as a whole at 1 and rotatable on bearings within a tube 2.
  • This Archimedian screw 1 is driven by a suitable motor (for simplicity, now shown).
  • a tubular'body 7 is also provided, fixedly connected to said tube 2, in which a member 3 is accomodated, this'member 3 being substantially an Archimedian screw or the like, in the present specification referred to as a distributor.
  • the distributor 3 rotates within said body 7 on bearings 8 and 9.
  • a suitable hydraulic motor 4 is provided (see FIG. 2). More particularly, this hydraulic motor 4 drives the distributor 3 through a worm screw 5 and a worm wheel 6.
  • the tube 2 is provided with a hole 24, and the tubular body 7 is also provided with a hole 21, so that the grit can pass from the interior of tube 2 through said holes 24 and 21 to the interior of the tubular body 7.
  • the distributor 3 is provided with a set of cavities 10, in which the material (that is the metal grit) is supplied and then ejected by centrifugal force from tube 7, as explained hereinafter.
  • An impeller (or turbine wheel) is also provided, comprising two disks l2 and 13, respectively, and blades 11 fast said disks.
  • This impeller also includes a mounting comprising two support pieces 14 and 14' connected to said disks l2 and 13. Said impeller also comprises a flange 15 and a shaft 16 connected to said flange l5.
  • Said mounting 14-14' is rotatable on the tubular body 7 by means of bearings 18 and 19, and said shaft 16 can rotate relative to distributor 3, i.e., rotation of shaft 16 is independent of distributor 3.
  • the impeller substantially forms an integral unit, that is comprising said elements 11, 12, 13,
  • FIG. 1 shows the device in a partly sectional view
  • the impeller shaft 16 is driven by a hydraulic motor 17.
  • Said flange 15 connects said shaft 16 to said mounting 14.
  • the tubular body 7 is crossed by slits (slots) 20 for the passage of the grit of the distributor 3 to the blades 11 of the impeller or turbine wheel above described.
  • the blades 11 are made of suitable particularly wear resistant material,such as manganese cast iron.
  • body 7 a hole 23 is provided and passed through by compressed air for ejecting any grit or powder depositing between elements 12 and 14, as well as between elements 12 and 14'. Theejection occurs through holes 22, 22 provided in supports 14 and 14'. This ejection avoids any seizure of the impeller or turbine wheel.
  • the metal grit arrives through tube 2 as propelled by the Archimedian screw 1 and through slits 24 and 21 penetrates the interior of the tubular body 7.
  • the grit is carried to the impeller and thereby reaches the cavities 10.
  • the material i.e., the grit arrives at said cavity 10 and by centrifugal force thrown onto the impeller blades 11 through slits 10. In turn, said blades 11 throw the metal grit against the surface to be processed.
  • processing can be carried out on an inner surface of a tube, that is metal grit can be thrown in all directions through an angle of 360.
  • This angle may vary according to the size and distri bution of slits 20. i
  • said Archimedian screw 1 is rotatably driven by a proper motor
  • distributor 3 is rotatably driven by said motor 4
  • the impeller is rotatably driven by motor 17.
  • the speeds of the several rotating members can be adjusted so that, for example, speed of distributor 3 being unaltered, the impeller speed can be increased or reduced, and vice versa.
  • speed of distributor 3 being unaltered
  • the impeller speed can be increased or reduced, and vice versa.
  • speed of said Archimedian screw 1 and distributor 3 a given amount of grit will exit in time unit.
  • the speed at which the impeller or turbine wheel throws this grit against the surface to be processed can be varied within wide ranges, as desired.
  • the blades 11 are interchangeable.
  • a device for abrading the inner surfaces of tubes comprising:
  • first tubular casing rotatably mounting said first screw;
  • Y a second motor-driven screw axially aligned with said first screw;
  • a second tubular casing having first and second ends and rotatably mounting said second screw; and an impeller rotatably mounted axially of and adjacent said first end of said second casing for rotation independent of the rotation of said second screw;
  • said first casing having an opening adjacent one of its ends, the second end of said second casing being fixedly connected to said one end of said first casing in overlapping fashion, said second casing having an opening therein aligned with the opening in said first casing, said second screw adapted to rotate at a different rotational velocity than said first screw;
  • the device as claimed in claim 4 including a worm screw on said screw drive-motor and a worm wheel keyed on said second screw, said worm screw and wheel providing driving power to said second screw.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00386700A 1972-08-16 1973-08-08 Device for surface sandblasting by metal grit or the like Expired - Lifetime US3857202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT28222/72A IT964014B (it) 1972-08-16 1972-08-16 Dispositivo per eseguire la sabbia tura mediante graniglia metallica o simile ad esempio all interno di tubi

Publications (1)

Publication Number Publication Date
US3857202A true US3857202A (en) 1974-12-31

Family

ID=11223174

Family Applications (1)

Application Number Title Priority Date Filing Date
US00386700A Expired - Lifetime US3857202A (en) 1972-08-16 1973-08-08 Device for surface sandblasting by metal grit or the like

Country Status (5)

Country Link
US (1) US3857202A (it)
CH (1) CH572791A5 (it)
FR (1) FR2196598A5 (it)
GB (1) GB1379187A (it)
IT (1) IT964014B (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000140A1 (en) * 1978-06-26 1980-02-07 Airmac Cryogenic Mach Deflashing apparatus
US5102468A (en) * 1987-09-29 1992-04-07 Lonza Ltd. Device for applying a descaling agent to the inner surface of a hollow billet
RU2158671C2 (ru) * 1997-12-10 2000-11-10 Государственное предприятие организация "Сатурн" Способ обработки поверхностей проточных каналов крыльчаток и устройство для его осуществления
CN103949980A (zh) * 2014-04-08 2014-07-30 大丰市飞腾铸造机械有限公司 具有粉尘预分离功能的环保抛丸清理机及其使用方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2170831A (en) * 1934-05-25 1939-08-29 American Foundry Equip Co Abrasive throwing machine
US2358557A (en) * 1942-06-26 1944-09-19 John G Boyd Blast cleaning device
US2670991A (en) * 1951-09-20 1954-03-02 Albert G Perkins Pipe coating apparatus
GB907359A (en) * 1959-10-15 1962-10-03 St Georges Engineers Ltd Improvements in shot blasting apparatus
US3401489A (en) * 1966-02-28 1968-09-17 Evert H. Wern Apparatus for airless blast finishing
US3444651A (en) * 1966-11-30 1969-05-20 Max Geisseler Centrifuging wheel
US3445966A (en) * 1966-06-30 1969-05-27 Pangborn Corp Abrasive blasting apparatus
US3777440A (en) * 1971-06-30 1973-12-11 Hitachi Shipbuilding Eng Co Abrasive slinging apparatus
US3824738A (en) * 1972-11-01 1974-07-23 W Hall Pipe cleaning apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2170831A (en) * 1934-05-25 1939-08-29 American Foundry Equip Co Abrasive throwing machine
US2358557A (en) * 1942-06-26 1944-09-19 John G Boyd Blast cleaning device
US2670991A (en) * 1951-09-20 1954-03-02 Albert G Perkins Pipe coating apparatus
GB907359A (en) * 1959-10-15 1962-10-03 St Georges Engineers Ltd Improvements in shot blasting apparatus
US3401489A (en) * 1966-02-28 1968-09-17 Evert H. Wern Apparatus for airless blast finishing
US3445966A (en) * 1966-06-30 1969-05-27 Pangborn Corp Abrasive blasting apparatus
US3444651A (en) * 1966-11-30 1969-05-20 Max Geisseler Centrifuging wheel
US3777440A (en) * 1971-06-30 1973-12-11 Hitachi Shipbuilding Eng Co Abrasive slinging apparatus
US3824738A (en) * 1972-11-01 1974-07-23 W Hall Pipe cleaning apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000140A1 (en) * 1978-06-26 1980-02-07 Airmac Cryogenic Mach Deflashing apparatus
US5102468A (en) * 1987-09-29 1992-04-07 Lonza Ltd. Device for applying a descaling agent to the inner surface of a hollow billet
RU2158671C2 (ru) * 1997-12-10 2000-11-10 Государственное предприятие организация "Сатурн" Способ обработки поверхностей проточных каналов крыльчаток и устройство для его осуществления
CN103949980A (zh) * 2014-04-08 2014-07-30 大丰市飞腾铸造机械有限公司 具有粉尘预分离功能的环保抛丸清理机及其使用方法
CN103949980B (zh) * 2014-04-08 2016-04-06 大丰市飞腾铸造机械有限公司 具有粉尘预分离功能的抛丸清理机及其使用方法

Also Published As

Publication number Publication date
FR2196598A5 (it) 1974-03-15
CH572791A5 (it) 1976-02-27
IT964014B (it) 1974-01-21
GB1379187A (en) 1975-01-02

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