US3629976A - Abrasive-treating apparatus - Google Patents

Abrasive-treating apparatus Download PDF

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Publication number
US3629976A
US3629976A US837271A US3629976DA US3629976A US 3629976 A US3629976 A US 3629976A US 837271 A US837271 A US 837271A US 3629976D A US3629976D A US 3629976DA US 3629976 A US3629976 A US 3629976A
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Prior art keywords
metering
gate
opening
nozzle
set forth
Prior art date
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Expired - Lifetime
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US837271A
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English (en)
Inventor
James H Carpenter Jr
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.)
Pangborn Corp
Original Assignee
Carborundum Co
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Assigned to KENNECOTT CORPORATION reassignment KENNECOTT CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DEC. 31, 1980 NORTH DAKOTA Assignors: BEAR CREEK MINING COMPANY, BEAR TOOTH MINING COMPANY, CARBORUNDUM COMPANY THE, CHASE BRASS & COPPER CO. INCORPORATED, KENNECOTT EXPLORATION, INC., KENNECOTT REFINING CORPORATION, KENNECOTT SALES CORPORATION, OZARK LEAD COMPANY, PLAMBEAU MINING CORPORATION, RIDGE MINING CORPORATION (ALL MERGED INTO)
Assigned to NATIONAL WESTMINSTER BANK USA, A NATIONAL BANKING ASSOCIATION reassignment NATIONAL WESTMINSTER BANK USA, A NATIONAL BANKING ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PANGBORN CORPORATION, A CORP. OF DE.
Assigned to PANGBORN CORPORATION reassignment PANGBORN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KENNECOTT CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts

Definitions

  • a treating apparatus includes particle feed means which supplied treating particles, such as abrasive shot, to a nozzle under pressure.
  • Metering means is disposed between the feed means and nozzle and is actuated by the pressure to open and close communication therebetween.
  • the metering means includes a particle outlet extending from the feed means and having a defined geometric shape with a metering gate being in sliding contact with the outlet
  • the metering gate also has an opening of a defined geometric shape so that the degree of registry of the openings controls the amount of particle flow to the nozzle.
  • ABRASIVE-TREATING APPARATUS BACKGROUND OF INVENTION Various pressure tank treating apparatus are in existence.
  • One such apparatus is a pressure tank abrasive blasting machine which is described in commonly assigned copending application Ser. No. 645,812, filed June 13, 1967, now U.S. Pat. No. 3,521,407, filed July 21, 1970.
  • This treating apparatus includes a plurality of pressurized chambers for supplying treating particles to a nozzle which is also under pressure. The lowermost chamber communicates with the nozzle by some type of valve or metering gate to regulate the flow of particles to the nozzle.
  • these conventional metering devices include an opening in the feed chamber which is selectively closed by the reciprocating movement of a plunger having, for example, a ball valve attached at its end for seating against the feed chamber opening.
  • An object of this invention is to provide a metering arrangement which can be incorporated in treating apparatus, particularly pressure tank abrasive blasting machines.
  • a further object of this invention is to provide such a metering arrangement which gives a very small abrasive fiow as well as a high flow and which can be easily and accurately adjusted to give fine increments of variable fiow.
  • a further object of this invention is to provide such a metering arrangement which is fail safe in operation.
  • a still further object of this invention is to provide such a metering arrangement which can be incorporated in the type of treating apparatus shown in commonly assigned copending application Ser. No. 645,812, filed June 13, 1967, now US Pat. No. 3,521,407, dated July 21, 1970.
  • the treating apparatus includes particle feed means for storing and supplying the treating particles.
  • a treating nozzle communicates with the feed means, and both the feed means and nozzle are pressurized.
  • Metering means between the nozzle and feed means is actuated by the pressure means to selectively permit the flow of particles to the nozzle.
  • the metering means include a particle outlet extending from the feed means and having an opening of defined geometric shape.
  • a metering gate is disposed in sliding contact with the outlet and also has an opening of defined geometric shape so that the degree of registry of the openings determines the amount of particle flow to the nozzle.
  • Adjusting means may be utilized for limiting the maximum amount of particle fiow.
  • Closing means may be provided in a metering chamber to urge the metering gate toward a closed position, while opening means such as a diaphragm may be connected to the metering gate and be responsive to the pressure in the nozzle so as to overcome the closing action of the closing means.
  • FIG. I is a cross-sectional plan view of a prior art metering arrangement
  • FIG. 2 is a plan view of a metering arrangement in accordance with this invention.
  • FIG, 3 is an elevation view in section of the metering arrangement shown in FIG, 2;
  • FIGS. 4 and 5 are plan views ofa portion of the metering arrangement shown in FIGS. 2-3 showing alternate constructions.
  • FIG. I shows a conventional prior art metering arrangement 2 which includes a feed chamber having for example a valve seat 4 which is opened and closed by the reciprocating movement of a ball valve 6 being mounted on the end of a plunger.
  • a 360 opening is obtained as illustrated in FIG. I.
  • the minimum opening must be greater than the largest diameter of shot or particle 8 being used.
  • the plunger is opened to this opening the particles can flow around the greater part of the 360 opening.
  • the flow area is then approximately the circumference of the inner surface of the valve seat 4 times the opening width required to flow the largest piece of abrasive shot.
  • FIGS. 2-3 illustrate a metering arrangement in accordance with this invention. As indicated most clearly in FIG. 3 the metering arrangement is utilized with a treating apparatus 10.
  • Apparatus 10 is preferably of the type described in detail in commonly assigned copending application Ser. No. 645,812, filed June 13, 1967, now US. Pat. No. 3,521,407, dated July 21, 1970. Since the details are referred to in this copending application the repetition of such details is not necessary herein except where desired for a clearer understanding of this invention.
  • Apparatus 10 includes a plurality of chambers the lowermost of which is the feed chamber 12 illustrated in FIG. 3.
  • the treating apparatus also includes a treating nozzle 14. Both feed chamber 12 and nozzle 14 are pressurized during a treating operation.
  • a metering arrangement 16 is disposed between the feed chamber 12 and nozzle 14 for selectively feeding particles to the nozzle.
  • arrangement [6 includes a gate spout or outlet 18.
  • Outlet 18 has an opening of defined geometric shape such as the square or rectangular opening 20 illustrated in FIGS. 2 and 4.
  • sliding gate 22 Directly under opening 20 and in sliding contact with outlet 18 is sliding gate 22 which likewise has an opening 24 of defined geometric shape.
  • Sliding gate 22 is reciprocated in the direction indicated by the arrow 26 and is actuated to close flow through the outlet 18 by spring 28 which may be any suitable spring such as a compression spring. Conversely sliding gate 22 is actuated to open flow by air pressure acting against diaphragm 30.
  • spring 28 which may be any suitable spring such as a compression spring.
  • sliding gate 22 is actuated to open flow by air pressure acting against diaphragm 30.
  • a screw or threaded rod 32 is also provided to limit or control the maximum opening movement of sliding gate 22. Screw 32 can also be manipulated by turning exposed handle 33 to tune the effective opening obtained by registry of openings 20 and 24 while the actual blasting operation takes place to give thereby optimum flow through the nozzle 14. 14.
  • spring 38 is provided. As shown in FIGS. 2 and 3 the leaf spring 38 is U-shaped with its legs 40 straddling the opening 24 in the sliding gate 22. Spring 38 thereby acts as a guide means to apply pressure against the lower side of sliding gate 22 and thus assures sliding contact with outlet 18. Edge 42 of outlet 18 is kept relatively sharp to prevent abrasive from wedging between the edge and sliding gate. Maximum wear life of sliding gate 22 and better sealing results by using a polyurethane or similar material.
  • diaphragm 30 to completely seal the remote portion of metering chamber 34 is also beneficial in that the diaphragm 30 prevents abrasive particles and dust from reaching the components such as spring 28 and threaded rod 32.
  • This sealed off portion includes vent 31 which is exposed to the atmosphere.
  • openings 20 and 24 may take different forms.
  • each opening is of square or rectangular shape.
  • An important characteristic, however, of the hole arrangements is that at least one of the holes has a narrow or pointed lead surface 44 which makes initial registry with the other hole when the pair of holes first become superimposed. In this manner the resultant opening becomes progressively larger in very fine increments by manipulation of exposed handle 33 at the end of rod 32. With this type of hole arrangements, fine abrasive flow control can be obtained. For example MG. 4 shows the minimum opening which will permit three grains of abrasive particles to be side by side.
  • the inventive gate is capable of continuously flowing a minimum 5.6 pounds per minute of l/l6-inch-diameter shot and as low as l/l0 pound per minute of shot having 0.007 inch diameter. The accuracy of flow repeatedly was found to be within percent.
  • FIG. I With the metering arrangement 16 a given increase in opening along the direction of axis 26 actually results in a smaller increase in orifice. For example if the prior art FIG. I arrangement would have an initial opening of 1/16 inch the area would be 0.19 square inch. If the opening in FIG. I is then increased 1/16 inch, the area becomes approximately 0.38 square inch which is a 100 percent increase. With the inventive arrangement such as illustrated in FIG. 4 if the area is originally 0.19 square inches and the opening is then increased l/l6 inch the resulting area will only be 0.23 l -square inch for an area increase of only 23 percent in contrast to the I00 percent area increase of conventional arrangements. This comparison strikingly illustrates how the inventive arrangement permits accurate, fine flow adjustments.
  • a treating apparatus comprising particle feed means for storing and supplying treating particles, a treating nozzle communicating with said feed means, pressure means for pressurizing said feed means and said nozzle, metering means causing the selective communication of said nozzle with said feed means.
  • said pressure means actuating the opening and closing of said metering means, said metering means including a particle outlet extending from said feed means, said outlet having an opening ofdefined geometric shape, a metering gate disposed in sliding contact with said outlet, said metering gate having an opening of a defined geometric shape whereby the degree of registry of said openings in said outlet and said gate controls the amount of particle flow from said feed means to said nozzle, one of said defined geometric shapes including a narrow leading surface with its opening becoming wider in a direction away from said leading surface, and said openings being disposed in the path of motion of each other in such a manner that at the beginning of registry of said openings said leading surface of one opening makes first registry with the other opening.
  • An apparatus as set forth in claim 1 including adjusting means connected to said gate for limiting the maximum amount of particles flowing through its opening.
  • An apparatus as set forth in claim 2 including a metering chamber communicating with said nozzle, said metering means being in said metering chamber, closing means acting upon said metering gate to urge said metering gate toward a closed position, and opening means responsive to the pressure in said nozzle acting upon said metering gate to urge said metering gate toward an open position whereby sufficient pressure in said nozzle causes said gate to open.
  • said adjusting means includes an adjustable stop member in said chamber disposed in the path of motion of said metering gate when said metering gate is moving in its opening direction.
  • An apparatus as set forth in claim 5 including guide means in said chamber for maintaining said gate in contact with said outlet.
  • said guide means is a U-shaped spring with its legs disposed for straddling the opening of said gate, and said metering chamber tapering downwardly toward said nozzle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Nozzles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US837271A 1969-06-27 1969-06-27 Abrasive-treating apparatus Expired - Lifetime US3629976A (en)

Applications Claiming Priority (1)

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US83727169A 1969-06-27 1969-06-27

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US (1) US3629976A (enrdf_load_html_response)
CA (1) CA917923A (enrdf_load_html_response)
DE (1) DE2031101A1 (enrdf_load_html_response)
FR (1) FR2051369A5 (enrdf_load_html_response)
GB (1) GB1259405A (enrdf_load_html_response)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798841A (en) * 1972-06-13 1974-03-26 A Eppler Pressure feed for sand blast abrasive
US3930340A (en) * 1973-12-14 1976-01-06 Alsan Williams Shot control valves
US6200203B1 (en) 1999-01-26 2001-03-13 Jet Edge Division Of Tm/American Monorail, Inc. Abrasive delivery system
US20020173220A1 (en) * 2001-02-13 2002-11-21 Lewin David M. Waterjet cutting system and method of operation
US20040132389A1 (en) * 2001-04-25 2004-07-08 Miller Donald Stuart Abrasive fluid jet machining apparatus
US20060037293A1 (en) * 2004-08-17 2006-02-23 Storer Ron D Blast medium pot
CN109986473A (zh) * 2019-02-21 2019-07-09 湖南机电职业技术学院 一种汽车空调用油气分离器除锈装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10235097B4 (de) * 2001-08-02 2006-04-13 Paul Auer Gmbh Vorrichtung zum Strahlen und Aufrauhen von Gegenständen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US531379A (en) * 1894-12-25 mathewson
US1585549A (en) * 1924-09-03 1926-05-18 Jorgensen Wesley Sand-blast apparatus
GB386031A (en) * 1931-08-28 1933-01-12 Frederick William Wilson Improvements relating to sand blasting machines
US3521407A (en) * 1967-06-13 1970-07-21 Carborundum Co Metal cleaning device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US531379A (en) * 1894-12-25 mathewson
US1585549A (en) * 1924-09-03 1926-05-18 Jorgensen Wesley Sand-blast apparatus
GB386031A (en) * 1931-08-28 1933-01-12 Frederick William Wilson Improvements relating to sand blasting machines
US3521407A (en) * 1967-06-13 1970-07-21 Carborundum Co Metal cleaning device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798841A (en) * 1972-06-13 1974-03-26 A Eppler Pressure feed for sand blast abrasive
US3930340A (en) * 1973-12-14 1976-01-06 Alsan Williams Shot control valves
US6200203B1 (en) 1999-01-26 2001-03-13 Jet Edge Division Of Tm/American Monorail, Inc. Abrasive delivery system
US20020173220A1 (en) * 2001-02-13 2002-11-21 Lewin David M. Waterjet cutting system and method of operation
US6827637B2 (en) * 2001-02-13 2004-12-07 Service Metal Fabricating, Inc. Waterjet cutting system and method of operation
US20040132389A1 (en) * 2001-04-25 2004-07-08 Miller Donald Stuart Abrasive fluid jet machining apparatus
US7033256B2 (en) * 2001-04-25 2006-04-25 Donald Stuart Miller Abrasive fluid jet machining apparatus
US20060037293A1 (en) * 2004-08-17 2006-02-23 Storer Ron D Blast medium pot
CN109986473A (zh) * 2019-02-21 2019-07-09 湖南机电职业技术学院 一种汽车空调用油气分离器除锈装置

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Publication number Publication date
DE2031101A1 (enrdf_load_html_response) 1971-01-07
CA917923A (en) 1973-01-02
FR2051369A5 (enrdf_load_html_response) 1971-04-02
GB1259405A (enrdf_load_html_response) 1972-01-05

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KENNECOTT CORPORATION

Free format text: MERGER;ASSIGNORS:BEAR CREEK MINING COMPANY;BEAR TOOTH MINING COMPANY;CARBORUNDUM COMPANY THE;AND OTHERS;REEL/FRAME:003961/0672

Effective date: 19801230

AS Assignment

Owner name: NATIONAL WESTMINSTER BANK USA, 592 FIFTH AVENUE, N

Free format text: SECURITY INTEREST;ASSIGNOR:PANGBORN CORPORATION, A CORP. OF DE.;REEL/FRAME:004576/0188

Effective date: 19860724

AS Assignment

Owner name: PANGBORN CORPORATION, PANGBORN BLVD., HAGERSTOWN,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KENNECOTT CORPORATION;REEL/FRAME:004614/0421

Effective date: 19860725