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EP0523181A1 - Appareil de sablage ameliore - Google Patents

Appareil de sablage ameliore

Info

Publication number
EP0523181A1
EP0523181A1 EP91908361A EP91908361A EP0523181A1 EP 0523181 A1 EP0523181 A1 EP 0523181A1 EP 91908361 A EP91908361 A EP 91908361A EP 91908361 A EP91908361 A EP 91908361A EP 0523181 A1 EP0523181 A1 EP 0523181A1
Authority
EP
European Patent Office
Prior art keywords
pressure
blasting
conveying line
pressure vessel
blasting medium
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.)
Withdrawn
Application number
EP91908361A
Other languages
German (de)
English (en)
Other versions
EP0523181A4 (en
Inventor
Lawrence Kirschner
Michael Stephen Lajoie
William E. Spears, 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.)
Church and Dwight Co Inc
Original Assignee
Church and Dwight Co Inc
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 Church and Dwight Co Inc filed Critical Church and Dwight Co Inc
Publication of EP0523181A1 publication Critical patent/EP0523181A1/fr
Publication of EP0523181A4 publication Critical patent/EP0523181A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B24C7/0084—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a mixture of liquid and gas
    • 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
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
    • B24C7/0061—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier of feed pressure

Definitions

  • This invention relates to improved apparatus for directing fine particles in a compressed air stream toward a workpiece.
  • Standard sand blasting equipment consists of a pressure vessel or blast pot to hold particles of a blasting medium such as sand, connected to a source of compressed air by means of a hose and having a means of metering the blasting medium from the blast pot, which operates at a pressure that is the same or slightly higher than the conveying hose pressure.
  • the sand/compressed air mixture is transported to a nozzle where the sand particles are accelerated and directed toward a workpiece.
  • Flow rates of the sand or other blast media are determined by the size of the equipment.
  • Commercially available sand blasting apparatus typically employ media flow rates of 20-30 pounds per minute. About 1.2 pounds of sand are used typically with about 1.0 pound of air, thus yielding a ration of 1.20.
  • less aggressive abrasives including inorganic salts such as sodium chloride and sodium bicarbonate
  • the medium flow rates required for the less aggressive abrasives is substantially less than that used for sand blasting, and has been determined to be from about 0.5 to about 10.0 pounds per minute, using similar equipment. This requires a much lower medium to air ratio, in the range of about 0.05 to 0.25.
  • difficulties are encountered in maintaining continuous flow at these low flow rates when conventional sand blasting equipment is employed.
  • the fine particles of a medium such as sodium bicarbonate are difficult to convey by pneumatic systems by their very nature.
  • blasting apparatus that can deliver the blast media at a uniform rate that can be controlled in a predictable manner, at flow rates yielding a medium-to-air ratio of between about 0.05 and 0.25 by weight, using a configuration similar to conventional commercially available sand blasting equipment.
  • a conventional blasting apparatus is modified to provide a separate source of line air to a blast pot through a pressure regulator to provide a greater pressure in the blast pot than is provided to the conveying hose.
  • This differential pressure is maintained by an orifice having a predetermined area situate between the blast pot and the conveying hose. This orifice provides an exit for the blast medium and a relatively small quantity of air from the blast pot to the conveying hose, and ultimately to the nozzle and finally the workpiece.
  • the differential air pressure typically operating between 1.0 and 5.0 psi with an orifice having an appropriate area, yields acceptable media flow rates in a controlled manner.
  • Figure 1 illustrates a blasting apparatus modified in accordance with the present invention.
  • Figures 2 and 3 are graphs of media flow rate versus pressure.
  • the flow of blast media in conventional sand blasting equipment is controlled by gravity feed and a metering valve.
  • the blast pot was under a small differential pressure with respect to the blast delivery hose pressure, which fluctuated between positive and negative; the result was that the flow rates of the blast media fluctuated also in response to the differential pressure changes.
  • a differential pressure gauge is installed between the delivery hose and the blast pot to monitor the differential pressure directly.
  • the pressure can be closely controlled by means of a pressure regulator at any hose pressure from 10 to 125 psig or higher, depending on the supply air pressure.
  • the present invention eliminates this source of flow rate variation and also modifies conventional equipment to handle blast media at low flow rates of about 0.5 to 10 pounds per minute, preferably up to about 5 pounds per minute.
  • blast media illustrated is sodium bicarbonate
  • other blast media such as potassium bicarbonate, ammonium bicarbonate, sodium chloride and other water-soluble salts are meant to be included herein.
  • blast apparatus 8 includes a blast pot 10, partially filled with blast media 12.
  • the medium control area typically but not limited to an orifice plate 18, further restricts the flow of the media 12 to the desired flow rate.
  • a line 20 is connected to a source or pressurized air (not shown) which is monitored with an inlet of monitor 22.
  • Air valve 24 is a remotely operated on/off valve that activates the air flow to the nozzle and the opening and closing of the media cut off valve.
  • Nozzle pressure regulator valve 26 regulates the nozzle pressure by means of a monitor 28 when the system is in operation. Nozzle pressure regulator valve 26 can maintain the desired nozzle pressure.
  • the nozzle pressure monitor 28 enables a controlled pressure to be applied to the nozzle 30, suitably having a throat diameter of about 0.5 inch.
  • the differential pressure gauge 32 monitors the pressure between the blast pot 10 and the conveying hose 34.
  • the pot pressure regulator 36 measured by gauge 38, is used to provide a pressure higher than the pressure in the conveying hose 34, thus allowing the differential pressure to be monitored by differential pressure gauge 32.
  • Optional equipment for protection of and cooling of the workpiece and the control of dust is provided by a water injection line 40, which injects water to the nozzle 30.
  • the blast media 12 is fed through media exit line 14 and the valve 16 to an orifice plate 18, which regulates the flow of media to the compressed air line 20.
  • the orifice openings can vary from about 0.063 to about 0.156 inch diameter, or openings corresponding to the area provided by circular orifices of 0.063 to 0.156 inch diameter.
  • the openings correspond to about a 0.125 inch opening for sodium bicarbonate media having a mean particle size of about 70 microns, and 0.156 inch opening for a media having a mean particle size from about 250 to about 300 microns.
  • a positive pressure of between about 1 to 5 psig, preferably about 2 to 4 psig, between the media exit line 14 and the conveying hose 34 is maintained at all times.
  • a source of compressed air is also fed to the air line 20, regulated by the valves 24 and 26 to the desired air pressure and nozzle pressure, respectively, which preferably is between about 15 to about 125 psig.
  • the pot pressure regulator 36 controls the pressure to the top of the blast pot 10, further ensuring a controlled and uniform flow of blast media 12.
  • the manometer or other differential pressure gauge 32 measures the differential pressure, which is proportional to the amount of media flowing through orifice 18.
  • the blast media, compressed air and water are delivered to the nozzle 30 and ejected toward the workpiece (not shown) at a uniform and controllable rate.
  • Figure 2 is a graph of media flow rate of from 1 to 5 pounds per minute versus different pressures in psi varying from 1 to 5 psi.
  • the data points were made using a sodium bicarbonate medium having a mean particle size of about 65 microns, a nozzle pressure of 60 psi and an orifice opening of 5/32 inch. It is apparent that the media flow varies linearly with pressure.
  • Figure 3 is a graph of media flow rate in pounds/min versus different pressure in psi using a sodium bicarbonate media having a mean particle size of 250 microns. Again, the media flow varies linearly with different pressures.
  • the present apparatus has an added benefit in that surface corrosion is removed at the same time as the coating, eliminating separate hand sanding or solvent dissolution techniques. Further, the present apparatus removed paint and other coatings efficiently and effectively from the surface of delicate metal parts, including areas around seams, rivets, screws, and the like, that heretofore required separate, special techniques.
  • the system can be used efficiently and controllably with robotics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Processing Of Meat And Fish (AREA)
  • Confectionery (AREA)
  • Fish Paste Products (AREA)
  • Air Transport Of Granular Materials (AREA)

Abstract

Appareil de sablage à pression industriel classique (8) modifié pour permettre un contrôle de la pression exercée dans le pot de projection qui est supérieure à la pression exercée dans la conduite où la matière de sablage et l'air sont mélangés pour transmettre un mélange à la tuyère, puis à la pièce à traiter. Un dispositif de contrôle de la matière de sablage (18), avec une aire fixe mais pouvant être facilement modifiée, est placé entre le pot de projection (10) et la conduite de mélange matière de sablage/air (20) pour mesurer le débit de la matière de sablage et maintenir le différentiel de pression entre le pot de projection et la conduite. Cela permet de contrôler le débit de la matière de sablage quand des débits lents, inférieurs à environ 10 livres par minute sont nécessaires.
EP19910908361 1990-04-06 1991-04-04 Improvement in blasting apparatus Withdrawn EP0523181A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50591890A 1990-04-06 1990-04-06
US505918 1990-04-06

Publications (2)

Publication Number Publication Date
EP0523181A1 true EP0523181A1 (fr) 1993-01-20
EP0523181A4 EP0523181A4 (en) 1993-02-10

Family

ID=24012425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910908361 Withdrawn EP0523181A4 (en) 1990-04-06 1991-04-04 Improvement in blasting apparatus

Country Status (9)

Country Link
EP (1) EP0523181A4 (fr)
JP (1) JPH0755450B2 (fr)
CN (1) CN1027873C (fr)
AU (1) AU638130B2 (fr)
CA (1) CA2079894A1 (fr)
IL (1) IL97704A0 (fr)
NZ (1) NZ237595A (fr)
WO (1) WO1991015336A1 (fr)
ZA (1) ZA912536B (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW218852B (en) * 1992-12-23 1994-01-11 D Fraresso William Apparatus for real time ice supply to ice blasting system
CN1073576C (zh) * 1998-03-17 2001-10-24 王金程 复合型超强吸水树脂的制造方法
CN101670562B (zh) * 2009-09-15 2011-06-22 重庆大学 高压水射流切割机磨料在线监控系统、装置和方法
JP5490674B2 (ja) * 2010-12-10 2014-05-14 株式会社フジエンジニアリング ブラスト材およびブラスト方法
CN102690051A (zh) * 2011-03-25 2012-09-26 海邦科技股份有限公司 玻璃板材的加工装置及方法
CN102672623A (zh) * 2012-05-25 2012-09-19 太仓凯鑫电子有限公司 一种喷丸抛光机
CN103447971A (zh) * 2013-09-12 2013-12-18 厦门四缘环保技术有限公司 一种喷砂机
CN104493725A (zh) * 2014-11-28 2015-04-08 德清透平机械制造有限公司 一种喷砂表面处理装置
CN104924470B (zh) * 2015-06-05 2017-04-05 江苏塞维斯数控科技有限公司 一种多线切割机用砂浆喷嘴
CN105033869A (zh) * 2015-07-14 2015-11-11 浙江新工机械制造有限公司 一种用于焊接工件的喷砂装置
CN105712084A (zh) * 2016-02-01 2016-06-29 北京理工大学 一种气体压力驱动式均匀供粉装置和方法
CN105666344A (zh) * 2016-02-04 2016-06-15 重庆明治百通机械制造有限公司 喷砂机及其供砂系统和流量控制阀
DE102016118081B4 (de) * 2016-09-26 2018-09-20 Ferton Holding S.A. Zahnreinigungssystem, Pulverbehälter sowie Einsatz für einen Pulverbehälter
CN108908137B (zh) * 2018-08-22 2023-11-17 南通理工学院 一种半封闭空间辅助喷砂机器人
CN110524436A (zh) * 2019-07-26 2019-12-03 国通净美科技服务有限公司 一种喷砂装置及清洗系统
CN111249990A (zh) * 2020-01-17 2020-06-09 儒众智能科技（苏州）有限公司 一种应用于手机中框毛刺的增强型干冰配方及其生产工艺
JP2021186803A (ja) * 2020-06-01 2021-12-13 江蘇佰健環保科技有限公司 調理器具の非粘着コーティングを環境にやさしく洗浄除去する方法とその設備
CN111843849B (zh) * 2020-08-05 2022-03-01 江苏佰健环保科技有限公司 安全环保型飞机蒙皮漆层的物理清除工艺及清除系统
CN113652935A (zh) * 2021-08-26 2021-11-16 蔡平 一种智能的道路标线的清除机
CN113996602A (zh) * 2021-11-02 2022-02-01 东南大学 一种印制电路板的孔道钻污清洗方法
CN114012608A (zh) * 2021-11-02 2022-02-08 东南大学 一种铜质物体表面锈蚀的无损清洗方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412402A (en) * 1978-07-28 1983-11-01 Cavitron Inc. Equipment and method for delivering an abrasive-laden gas stream
US4878320A (en) * 1987-12-04 1989-11-07 Whitemetal, Inc. Abrasive feed system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729917A (en) * 1953-06-30 1956-01-10 William C Gregory Cleaning apparatus
US2913281A (en) * 1957-12-16 1959-11-17 Shell Dev Transport of finely divided solids
US4420957A (en) * 1981-10-26 1983-12-20 Progressive Blasting Systems, Inc. Monitor method and apparatus for particle blasting equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412402A (en) * 1978-07-28 1983-11-01 Cavitron Inc. Equipment and method for delivering an abrasive-laden gas stream
US4878320A (en) * 1987-12-04 1989-11-07 Whitemetal, Inc. Abrasive feed system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9115336A1 *

Also Published As

Publication number Publication date
AU638130B2 (en) 1993-06-17
CN1058927A (zh) 1992-02-26
ZA912536B (en) 1991-12-24
AU7744691A (en) 1991-10-30
CN1027873C (zh) 1995-03-15
EP0523181A4 (en) 1993-02-10
JPH05507242A (ja) 1993-10-21
IL97704A0 (en) 1992-06-21
WO1991015336A1 (fr) 1991-10-17
NZ237595A (en) 1993-09-27
JPH0755450B2 (ja) 1995-06-14
CA2079894A1 (fr) 1991-10-07

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