US3841025A - Deflector for abrasive-accelerator in blasting machine - Google Patents

Deflector for abrasive-accelerator in blasting machine Download PDF

Info

Publication number
US3841025A
US3841025A US00266731A US26673172A US3841025A US 3841025 A US3841025 A US 3841025A US 00266731 A US00266731 A US 00266731A US 26673172 A US26673172 A US 26673172A US 3841025 A US3841025 A US 3841025A
Authority
US
United States
Prior art keywords
deflector
slot
abrasive
particles
accelerator
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
US00266731A
Other languages
English (en)
Inventor
R Maeda
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3841025A publication Critical patent/US3841025A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor
    • B24C5/068—Transferring the abrasive particles from the feeding means onto the propeller blades, e.g. using central impellers

Definitions

  • a deflector for an abrasive-accelerator in a blasting machine comprising a hollow tubular body having at one end a central opening for receiving an impeller of the accelerator, with the other end being detachably attached to a chute section of the accelerator, and a slot formed locally through the circumferential wall of the body for hurling particles of abrasive therethrough towards the rotating vanes surrounding the rotating impeller, the slot having a parallelogram configuration and being inclined relative to the central longitudinal axis of the deflector body, said inclined slot being of a circumferential width such that the angle formed by the radial outermost end edges of the parallelogram relative to the longitudinal central axis of the body corresponds to the angle through which the particles are blasted by the vanes onto the surface of a workpiece and that the overall axial length of this parallelogram is not greater than the
  • the present invention is concerned with a deflector for an abrasive-accelerator in a blasting machine, and more particularly it pertains to an improvement in such a deflector.
  • a known abrasive particles accelerator comprises, as shown in FIGS. 6 and 7, a base frame 1, casing 2 fixed to his base frame 1, a chute 3, a deflector 4 attached to said chute 3, and a disk 5 provided concentrically with said deflector 4.
  • the disk 5 is rotated via a pulley 8 and a shaft 9.
  • On one flat surface of this disk 5 are attached a plurality of vanes 6 radially of the disk.
  • an impeller 7 which is fixed to the shaft 9.
  • a slot is formed locally through the circumferential wall of the deflector 4 so as to face the vane 6 so that particles of abrasive may be hurled therethrough toward the surfaces of the vanes 6.
  • the slot 10 is eigher square or rectangular in configuration when viewed from directly thereabove as shown in FIG. 8 so that its opposing two edges 10a and 10a are parallel with the central longitudinal axis C or with the central rotating axis of the impeller and the vanes, and also that the opposing other two edges 10b and 10 b of this slot 10 are perpendicular to said central longitudinal axis or to said opposing two edges l0a.and 10a and are parallel relative to each other.
  • the length a of each edge 10a of one pair is not greater than the breadth W of the vane 6.
  • each edge 10b of the other pair is equal to the are formed on the circumferential wall of the deflector with an angle or extending from the center of a circle and corresponding substantially to the angle [3 through which particles of abrasive are blasted by the vanes 6.
  • the particles of abrasive which are discharged through the slot 10 are then blasted onto the surface of the workpiece 11 through a blasting angle B which is substantially equal to said center angle a, so that the surface of the workpiece 11 is processed through the range of area defined by the breadth d and the length L as shown in'the drawmg.
  • the density of the particles of abrasive at the surface of the workpiece 11 is such that the profile of the density of the blasted particles of abrasive takes a sort of angular configuration, in which this angular profile for the entire length L of blast shows a progressive downward inclination on both sides of this angular profile.
  • the length L covered by those blasted particles located in that portion having a density sufficient for being useful in processing said surface of the workpiece is seen to be considerably small as compared with the overall length L of the blasted particles.
  • the amount of the abrasive particles serves to be quite critical in processing so that in case the amount discharged is smaller than the optimum rate of blast, the length L of the useful particles of blast will become very small. Contrariwise, in the event that the rate of blast is greater than the optimum rate, the length L will become closer to the length L, but the numerous streams m of the bouncing particles which occur after they run into the surface of the workpiece as they are blasted from the vanes will obstruct the paths of the particles being blasted from the vanes and thus they interfere with these fresh particles coming from the vanes, causing uneveness in the processing of the surface. In order to solve these problems, it is considered that the area of opening of the hurling slot may be reduced.
  • the length b of the opposing edges of the slot governs the angle B of the blast of the accelerator, it is impossible to reduce this length.
  • the length a of the opposing other edges of the slot is determined as a matter of course relative to the breadth W of the vane in view of the wear of the vane. If this length a is reduced beyond the optimum length, the vane will locally become worn out quickly.
  • the primary object of the present invention to provide a deflector having a slot of an im' proved configuration for hurling particles therethrough to make it possible that, irrespective of the flow rate of the abrasive particles blasted, these particles impinging onto the surface of the workpiece will have a uniform density throughout the entire length of the blast received on the surface of the workpiece, and that the distance'through which the work surface is processed by the blasted particles is prolonged, and that this processing requires a much reduced length of time as compared with the prior art without causing any uneven result of processing.
  • FIG. 1 is a perspective view showing a preferred example of the deflector according to the present invention.
  • FIG. 2 is a side view of the same deflector shown in FIG. 1.
  • FIG. 3 is a side view showing another preferred example of the deflector embodying the present invention.
  • FIG. 4 is a side view showing still another preferred example of the deflector embodying the present invention.
  • FIG. 5 is a perspective view in an exploded fashion of the deflector shown in FIG. 4.
  • FIGS. 6 through 7 show the structure and function of a known abrasive-accelerator of a blasting machine, in which:
  • FIG. 6 is a vertical sectional view of the abrasiveaccelerator.
  • FIG. 7 is a sectional view, taken along the line VII- VII in FIG. 6, of the deflector, vanes and impeller.
  • FIG. 8 is a side view of a known deflector used in the abrasive-accelerator shown inFIGS. 6 and 7.
  • the deflector according to the present invention is provided with a slot having a parallelogram configuration for hurling abrasive particles therethrough to the vanes.
  • This slot opens through the circumferential wall of the deflector with an inclination relative to the central longitudinal axis of the deflector.
  • this slot is such that its width between the opposing two outermost edges positioned radially of and possibly in parallel with the central longitudinal axis of the deflector is determined by the angle of blast of the abrasive particles discharged from the vanes, and that the overall axial length of the slot is not larger than the breadth W of the vane.
  • Such a slot enables the abrasive particles to be hurled out uniformly along the edges of opening of the slot which is inclined relative to the longitudinal central axis of the deflector.
  • the hurled particles of abrasive are restricted of the extension of their spread by these edges of opening.
  • the abrasive particles are hurled onto the vane in uniform density with a length equal to the axial length of opposing two edges of opening and with a breadth equal to the breadth of the other opposing two edges of opening of the inclined parallelogram slot.
  • FIGS. 1 through 3 are each constructed to be used in the apparatus shown in FIGS. 6 and 7.
  • a plate 17 having an opening 16 for receiving an impeller 7.
  • an attachment 18 At the other end of this body 15 is mounted an attachment 18 so that the body 15 is detachably attached to a chute 3 by means of this attachment 18.
  • a slot 12 is formed through the circumferential wall of the body 15 for hurling out abrasive particles supplied from the chute 3.
  • the slot 12 is of a parallelogram configuration and opens through the wall of the body 15 with an inclination relative to the longitudinal central axis C of the deflector or to the central rotary axis of the impeller 7 or the vanes.
  • Each of a pair of parallel edges 12b and 12b of opening of said slot 12 is formed in such a way that the length of this edge b corresponds to the line of arc defined on the circumferential wall of the body 15 with a center angle a of the opening namely, with an angle a which is substantially equal to the angle B through which the abrasive particles are blasted from the vane.
  • edges 12a and 12a of opening which are parallel with each other are formed so that the distance a between these two edges 12a and 12a is of the following relation with respect to the breadth W of the vane 6: a 2 W.
  • the length of the edge 12b of the opening has the following relation with respect to the breadth W of the vane: a E W.
  • the slot 12 is of a parallelogram shape as in the preceding example.
  • This slot opens through the circumferential wall of the body 15 with an inclination relative to the longitudinal central axis C of the deflector.
  • the edges 12a and 12a of opening are arranged in a different fashion as compared with those shown in FIG. 2. More specifically, these two edges 12a and 12a are arranged so as to be parallel with the longitudinal central axis of the deflector.
  • a deflector having a slot of such a shape may present a slight unevenness in the density of the abrasive particles blasted from the vane, but still the blast is sufficiently useful in actual operation.
  • the area of opening of the slot is arranged so that it can be varied freely.
  • This body is comprised of two body sections, one of which is inserted in the other one of these two body sections.
  • the first one of the two body sections 15A is of a hollow tubular shape and has at one end a flange 18 which is integral with the body section 15A and which is to be attached to the chute 3.
  • the other or the second body section 153 into which said first body section 15A is to be rotatably inserted has also a hollow tubular shape and is provided at one end with a ring 19 for limiting the unnecessary axial movement of the body section 15A and at the other end with a plate 17 having an opening 16 for receiving an impeller 16.
  • a slot 12 is arranged to be formed when thecutouts formed through the circumferential walls of these two body sections, respectively, are rendered to overlap each other as the second body section which receives or the first body section therein is rotated relative to the first one. Because of this arrangement, it should be noted that each of the pair of edges 12b and 12b of the openings of these two cut-outs is inclined relative to the longitudinal central axis C of the deflector, whereas the edges 12a and 12a of the other pair are perpendicular to said longitudinal central axis of the deflector. Moreover, the axial length a between the edges 12a and 12a is of the following relation with respect to the breadth W of the vane: a E W.
  • the length b between the two outermost ends of the edges 12b and 12b is determined so as to be equal to the line of are formed on the circumferential wall of the body to correspond to the angle of blast of the abrasive particles delivered from the vane.
  • a deflector described above it is possible to acquire an area of opening of the slot which meets the rate of flow of abrasive particles, without changing the conditions in which the abrasive particles are hurled onto the vane.
  • the control of the area of opening of the slot can be effected, for example, by providing teeth or gear formation on the periphery of the ring 19 of the body section 15A so that this gear is rotated externally of the accelerator.
  • a deflector for an abrasive-accelerator in a blasting machine which includes a rotatable impeller, means for conveying abrasive material to said impeller and a plurality of vanes for directing said abrasive material onto a workpiece, the improvement comprising a hollow tubular deflector body having one end open for receiving said impeller, said impeller being rotatably positioned within said deflector body, said deflector body having at least one slot formed through the circumferential wall thereof for permitting abrasive particles to be hurdled out to said vanes of said accelerator through said slot, wherein said slot is of a parallelogram shape and forms an opening in said wall of said body with an inclination relative to the longitudinal central axis of the deflector and wherein two edges of the slot are arranged perpendicular to the longitudinal central axis of the deflector.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US00266731A 1971-06-28 1972-06-27 Deflector for abrasive-accelerator in blasting machine Expired - Lifetime US3841025A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46046290A JPS5032142B1 (fr) 1971-06-28 1971-06-28

Publications (1)

Publication Number Publication Date
US3841025A true US3841025A (en) 1974-10-15

Family

ID=12743068

Family Applications (1)

Application Number Title Priority Date Filing Date
US00266731A Expired - Lifetime US3841025A (en) 1971-06-28 1972-06-27 Deflector for abrasive-accelerator in blasting machine

Country Status (3)

Country Link
US (1) US3841025A (fr)
JP (1) JPS5032142B1 (fr)
GB (1) GB1400158A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921337A (en) * 1974-05-17 1975-11-25 Riichi Maeda Centrifugal blasting apparatus
US4034516A (en) * 1974-05-17 1977-07-12 Riichi Maeda Centrifugal blasting apparatus
US5975985A (en) * 1996-10-31 1999-11-02 Phillips Technologies, Inc. Automated surface treatment apparatus having current monitoring means
US5983763A (en) * 1995-07-10 1999-11-16 Koch Supplies, Inc. Deflector mechanism for liquid-jet cutter
WO2015172591A1 (fr) * 2014-05-16 2015-11-19 宝山钢铁股份有限公司 Procédé de traitement de surface d'une bande de plaque métallique par éjection centrifuge d'un abrasif par voie humide
US20160318153A1 (en) * 2014-07-15 2016-11-03 Sintokogio, Ltd. Shot processing apparatus
US20170144269A1 (en) * 2014-06-24 2017-05-25 Sintokogio, Ltd. Shot processing apparatus and projector
EP3064318A4 (fr) * 2013-10-31 2017-05-31 Sintokogio, Ltd. Dispositif projecteur centrifuge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6285204U (fr) * 1985-11-16 1987-05-30

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB441466A (en) * 1934-04-18 1936-01-20 American Foundry Equip Co Improvements relating to abrasive throwing machines
US2708814A (en) * 1952-09-05 1955-05-24 American Wheelabrater & Equipm Centrifugal blasting wheel
US3368308A (en) * 1964-11-03 1968-02-13 Pangborn Corp Centrifugal blasting apparatus
US3629975A (en) * 1969-10-10 1971-12-28 Carborundum Co Particle-throwing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB441466A (en) * 1934-04-18 1936-01-20 American Foundry Equip Co Improvements relating to abrasive throwing machines
US2708814A (en) * 1952-09-05 1955-05-24 American Wheelabrater & Equipm Centrifugal blasting wheel
US3368308A (en) * 1964-11-03 1968-02-13 Pangborn Corp Centrifugal blasting apparatus
US3629975A (en) * 1969-10-10 1971-12-28 Carborundum Co Particle-throwing apparatus

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034516A (en) * 1974-05-17 1977-07-12 Riichi Maeda Centrifugal blasting apparatus
US3921337A (en) * 1974-05-17 1975-11-25 Riichi Maeda Centrifugal blasting apparatus
US5983763A (en) * 1995-07-10 1999-11-16 Koch Supplies, Inc. Deflector mechanism for liquid-jet cutter
US5975985A (en) * 1996-10-31 1999-11-02 Phillips Technologies, Inc. Automated surface treatment apparatus having current monitoring means
US20190009386A1 (en) * 2013-10-31 2019-01-10 Sintokogio, Ltd. Centrifugal projector
EP3064318A4 (fr) * 2013-10-31 2017-05-31 Sintokogio, Ltd. Dispositif projecteur centrifuge
US10850367B2 (en) * 2013-10-31 2020-12-01 Sintokogio, Ltd. Centrifugal projector
US10071463B2 (en) 2013-10-31 2018-09-11 Sintokogio, Ltd. Centrifugal projector
WO2015172591A1 (fr) * 2014-05-16 2015-11-19 宝山钢铁股份有限公司 Procédé de traitement de surface d'une bande de plaque métallique par éjection centrifuge d'un abrasif par voie humide
CN105081984A (zh) * 2014-05-16 2015-11-25 宝山钢铁股份有限公司 一种湿法离心抛射研磨料的金属板带表面处理方法
US20170144269A1 (en) * 2014-06-24 2017-05-25 Sintokogio, Ltd. Shot processing apparatus and projector
US10035241B2 (en) * 2014-06-24 2018-07-31 Sintokogio, Ltd. Shot processing apparatus and projector
US20160318153A1 (en) * 2014-07-15 2016-11-03 Sintokogio, Ltd. Shot processing apparatus
US10010998B2 (en) * 2014-07-15 2018-07-03 Sintokogio, Ltd. Shot processing apparatus

Also Published As

Publication number Publication date
GB1400158A (en) 1975-07-16
JPS5032142B1 (fr) 1975-10-17

Similar Documents

Publication Publication Date Title
US3841025A (en) Deflector for abrasive-accelerator in blasting machine
US3768209A (en) Impelling wheel for particulate material
US3127886A (en) System for supplying a coolant liquid to a rotary stone cutting saw or the like
US3694963A (en) Centrifugal blasting wheel
US2507166A (en) Directional control blasting wheel
US4329819A (en) Centrifugal blasting apparatus
US2708814A (en) Centrifugal blasting wheel
US2590576A (en) Abrading apparatus
US2170831A (en) Abrasive throwing machine
US2314069A (en) Abrasive blast
CA1322103C (fr) Nettoyeur polyvalent
US1953566A (en) Blasting machine
US2049466A (en) Abrasive throwing wheel
US2442678A (en) Wear plate for shot blast machines
US4176502A (en) Spacerless blasting wheel and blade locking arrangement therefor
US2672172A (en) Electric plane
GB442539A (en) Improvements in or relating to machines for throwing abrasive at blasting velocities
GB665832A (en) Abrading apparatus
US2625332A (en) Rejector blade for rotary pulverizers
US4199108A (en) Apparatus for building up and repairing a refractory lining
US2618307A (en) Abrasion type hulling machine
US3401489A (en) Apparatus for airless blast finishing
US2170832A (en) Abrasive throwing machine
US3921337A (en) Centrifugal blasting apparatus
US2204632A (en) Abrasive throwing machine