EP1197297B1 - Dispositif de production et de projection de particules solides sublimables - Google Patents

Dispositif de production et de projection de particules solides sublimables Download PDF

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Publication number
EP1197297B1
EP1197297B1 EP00870223A EP00870223A EP1197297B1 EP 1197297 B1 EP1197297 B1 EP 1197297B1 EP 00870223 A EP00870223 A EP 00870223A EP 00870223 A EP00870223 A EP 00870223A EP 1197297 B1 EP1197297 B1 EP 1197297B1
Authority
EP
European Patent Office
Prior art keywords
particles
disc
teeth
container
solid
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
EP00870223A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1197297A1 (fr
Inventor
Pascal Ullens De Schooten
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
Priority to DK00870223T priority Critical patent/DK1197297T3/da
Priority to AT00870223T priority patent/ATE284295T1/de
Priority to DE60016596T priority patent/DE60016596T2/de
Priority to PT00870223T priority patent/PT1197297E/pt
Priority to EP00870223A priority patent/EP1197297B1/fr
Application filed by Individual filed Critical Individual
Priority to ES00870223T priority patent/ES2233322T3/es
Priority to BE2001/0153A priority patent/BE1014045A6/fr
Publication of EP1197297A1 publication Critical patent/EP1197297A1/fr
Application granted granted Critical
Publication of EP1197297B1 publication Critical patent/EP1197297B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2

Definitions

  • the term "sublimable solid particles” means particles which are produced from a material which, at the temperature and at the pressure of the medium in which the particles are sprayed, are capable of subliming.
  • Such particles advantageously consist of particles of solidified gas at a temperature below 20 ° C, in particular at a temperature below 0 ° C, preferably at a temperature below -20 ° C.
  • Such particles are for example particles of CO 2 or containing solid CO 2 .
  • Document EP-A-0768934 (& WO-A-96/01168) discloses an apparatus for producing and spraying sublimable granules on request.
  • This device comprises a granulation system comprising cutting edges mounted to rotate, a device for driving the cutting edges, a supply device intended to advance solid CO 2 to the granulation system, a conduit guiding the granules of CO 2 to a distributor bringing the granules into a pipe in which a propellant gas flows, and a projection head mounted on the free end of the pipe.
  • the sublimable solid particles thus produced have for example an average size between 0.1 mm and 6 mm, in particular an average size between 0.5 and 4mm.
  • the particle size distribution can be monomodal, but is advantageously bimodal (mixture having a large proportion of first particles having a first particle size and a large proportion second particles having a second particle size different from the first particle size).
  • the disc forms a bottom of the container, so that the particles in the container are at least pushed or entrained towards the disc thanks to gravity.
  • the solid particles or block (s) present in the container are substantially only pushed or dragged towards the disc by the force of gravity.
  • the disc preferably has teeth arranged to grate the particles or container block into smaller particles.
  • the teeth are arranged in successive series, each series extending advantageously substantially along a radial of the disc.
  • the disc presents for example 4 or more than 4, advantageously 6 or more than 6, preferably 8 or more than 8 sets of teeth.
  • the teeth of the disc are advantageously located so as to define paths different when rotating the disc.
  • the disc has at least two sets of teeth, the teeth of a first set forming a or courses located between courses defined by teeth of the second series.
  • the teeth have a free edge in the form of U or along the edges or sides of a triangle, a square, a rectangle, a half hexagon, half trapezoid, half octagon, half pentagon, etc., and present means for guiding the particles formed through the disc.
  • the disc has at least one series of teeth adapted to form at least one edge for the particles formed.
  • the disc has teeth to produce particles having at least one edge, for example defined between two planar faces forming an angle of less than 90 ° (for example less than 60 °, even less than 45 °) between them, and teeth to produce irregular but substantially spherical particles.
  • the drive means of the disc is for example a means for adjusting or controlling the speed of rotation of the disc.
  • the speed of rotation of the disc can for example be adjusted or controlled between 1 revolution / minute and 500 revolutions / minute, in particular between 5 and 100 revolutions / minutes, advantageously between 10 and 75 revolutions / minutes.
  • the adjustment of the speed of rotation of the disc can be continuous or progressive and / or discontinuous or with a pallet of predetermined speed.
  • the speed of the disc will also depend on the diameter of the disc, the number of teeth, the size of the teeth, the shape of the teeth, etc.
  • the invention also relates to a treatment method at least one face of an object by projection of particles of matter sublimable prepared by a device according to any one of claims 1 to 8.
  • one or more blocks, granules or pellets containing solid CO 2 are used to prepare particles with a diameter of less than 6 mm.
  • blocks, granules or pellets or sticks of CO 2 are used .
  • Any other form of crystallized CO 2 can be used.
  • a disc carrying suitable teeth is used to form particles with at least one edge.
  • At least the gravity pushes the block (s), granules, sticks or pellets towards the bearing disc teeth.
  • substantially only gravity pushes the blocks, sticks, granules or pellets to the disc bearing teeth.
  • the subject of the invention is also a means of preparing sublimable solid particles for a device according to one of claims 1 to 8, this means being as defined to claim 1 and advantageously comprising one or more characteristics as defined in claims 2 to 8.
  • the teeth 15 of the disc 14 are arranged to form during the rotation of the disc particles of average diameter by weight less than 6mm from the particles or blocks present in the container and in which the teeth are associated with one or passages to allow the passage of particles formed through the disc.
  • the pellets or blocks of sublimable material placed in the container 10 are pushed towards the disc 14 by the force of gravity. It has been observed that by using the force of gravity to push pellets or blocks of CO 2 towards the disc 14, a good production of particles with a diameter of less than 6 mm is obtained, this production being easier than production requiring the application of significant forces to push the pellets or blocks towards the disc.
  • the device according to the invention does not include an additional device for pushing the pellets or blocks towards the disc 14, the device according to the invention is lighter, and is therefore more easily portable. According to a possible variant, it can be worn on the back of a user by means of an appropriate system, such as a system comprising one or more straps or straps (for example a system similar to the system used to carry on his back. spraying devices).
  • the disc 14 has on its upper face series of teeth (eight series are shown as an example only), each set of teeth having teeth aligned along a radial of the disc 14.
  • the teeth are spaced apart others at a distance of at least 1mm, advantageously at least 2 mm.
  • the teeth of a series are advantageously not located in the course circular teeth of another series.
  • the teeth 15 of the disc 14 have a leading edge defining with the upper face of the disc a triangular shape.
  • the action of such a tooth on a pellet or block causes the tearing of a particle or particles.
  • the pellets or blocks of CO 2 are only pushed onto the disc substantially with the force of gravity (possibly the force of gravity + the weight of the particles or pellets located above the pellets in contact with the disc ), substantially only CO 2 particles pass through the disc.
  • Each tooth 15 is associated with a passage 15A allowing the passage of particles through the disc 14. (see Figures 3 and 4)
  • the teeth 15 have an edge suitable for preparing particles having a domed shape.
  • other shapes are possible, such as a shape along the edges of a square, a rectangle, trapezoid, parallelogram, part of an octagon, a part of a pentagon, part of a hexagon, part of an ellipse, etc.
  • the same disc can have teeth of different shapes.
  • FIG 7 is a schematic view of another device according to the invention which is similar to the device shown in Figure 1.
  • air compressed is brought by a conduit 30 to the level of the hopper or funnel, this air tablet promoting the flow of particles 19 to the dispenser or mixer 22.
  • all the compressed air is brought into the hopper or funnel, the hopper or funnel then being directly connected to conduit 24, the end of which is provided with a projection head 25.
  • Pellets or blocks (of various shapes, cylindrical, substantially spherical, flattened, irregular shape, etc.) having average diameters between 2mm and 50mm (in particular between 5 and 50mm) have been used in these devices for the preparation of particles.
  • CO 2 with a mean diameter by weight of 3mm.
  • the different batches of particles or pellets of CO 2 used had a mean diameter by weight of 2mm, 3mm, 6mm, 10mm, 15mm, 20mm, 25mm, 30mm and 50mm respectively.
  • the term “mean diameter by weight” means the mean by weight of the equivalent diameter of the particles, pellets or blocks, the equivalent diameter of a particle, block, etc. corresponding to : 6 x (Particle volume / external surface of the particle)
  • FIGS. 1 and 7 were used for cleaning, disinfection, to remove layers of varnish, paint, etc. Particles with a edges were most conducive to effective cleaning.
  • the distributor 22 is advantageously a venturi system. Possibly the hopper or funnel 20 can be combined with a venturi system to ensure better flow of particles in duct 21.
  • the compressed air used for the flow and the projection of the particles is for example air having a pressure greater than 2 10 5 Pa, for example a pressure between 3 10 5 and 20 10 5 Pa, in particular between 4 10 5 and 10 10 5 .
  • This compressed air is preferably dry or substantially dry compressed air and is advantageously cooled to limit the sublimation of CO 2 particles. If the compressed air is not cooled, part of the CO 2 particles can sublime in the duct 24, so as to cool the air temperature.
  • the particles exit with sufficient speed to strike violently the surface to be treated, the particles sublimating at least partially in contact with the surface to be treated.
  • This speed can vary for example between 1 and 100m / s, in particular between 5 and 50m / s. It is also possible to vary this speed as needed.
  • the device according to the invention is advantageously provided with one or more scrapers 50, 51 acting in the vicinity of the disc 14.
  • a scraper is for example fixed relative to the container 10.
  • This scraper 50 is preferably arranged to exert a scraping force on the face of the disc 14 carrying the teeth 15 or (but preferably) on the particles or blocks of CO 2 in contact or directed towards the face of the disc carrying the teeth.
  • This scraper 50 may if necessary be mobile, or be rotated in the direction of rotation of the disc but with a different speed of rotation (for example smaller than that of the disc), or in a direction of rotation opposite to the direction of disc rotation.
  • air was used as the carrier gas. It is clear that other carrier gases could have been used, such as nitrogen, CO 2 gas, oxygen (for example if an oxidation of the support is required), etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Glanulating (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Developing Agents For Electrophotography (AREA)
EP00870223A 2000-10-04 2000-10-04 Dispositif de production et de projection de particules solides sublimables Expired - Lifetime EP1197297B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT00870223T ATE284295T1 (de) 2000-10-04 2000-10-04 Vorrichtung zum erzeugen von und zum strahlen mit schmelzbaren teilchen
DE60016596T DE60016596T2 (de) 2000-10-04 2000-10-04 Vorrichtung zum Erzeugen von und zum Strahlen mit schmelzbaren Teilchen
PT00870223T PT1197297E (pt) 2000-10-04 2000-10-04 Dispositivo para a producao e a projeccao de particulas solidas sublimaveis
EP00870223A EP1197297B1 (fr) 2000-10-04 2000-10-04 Dispositif de production et de projection de particules solides sublimables
DK00870223T DK1197297T3 (da) 2000-10-04 2000-10-04 Apparat til fremstilling og udkastning af sublimerbare, faste partikler
ES00870223T ES2233322T3 (es) 2000-10-04 2000-10-04 Dispositivo de produccion y de proyeccion de particulas solidas sublimables.
BE2001/0153A BE1014045A6 (fr) 2000-10-04 2001-03-08 Dispositif de production et de projection de particules solides, en particulier sublimables.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00870223A EP1197297B1 (fr) 2000-10-04 2000-10-04 Dispositif de production et de projection de particules solides sublimables

Publications (2)

Publication Number Publication Date
EP1197297A1 EP1197297A1 (fr) 2002-04-17
EP1197297B1 true EP1197297B1 (fr) 2004-12-08

Family

ID=8175821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00870223A Expired - Lifetime EP1197297B1 (fr) 2000-10-04 2000-10-04 Dispositif de production et de projection de particules solides sublimables

Country Status (7)

Country Link
EP (1) EP1197297B1 (es)
AT (1) ATE284295T1 (es)
BE (1) BE1014045A6 (es)
DE (1) DE60016596T2 (es)
DK (1) DK1197297T3 (es)
ES (1) ES2233322T3 (es)
PT (1) PT1197297E (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6626737B1 (en) 2002-04-12 2003-09-30 Ullens De Schooten Pascal Machine to produce and propel sublimable solid particles
CN109415169B (zh) 2015-02-02 2021-02-02 Chp股份有限公司 干式润滑传送带设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684207A (en) * 1950-06-08 1954-07-20 Servel Inc Ice-chipping machine
US2767884A (en) * 1950-10-06 1956-10-23 Ciba Ltd Storage and discharge container with rotatable base or wall
US4718610A (en) * 1985-09-17 1988-01-12 Gallaher Harold D Ice shaver
US5520572A (en) * 1994-07-01 1996-05-28 Alpheus Cleaning Technologies Corp. Apparatus for producing and blasting sublimable granules on demand

Also Published As

Publication number Publication date
BE1014045A6 (fr) 2003-03-04
DK1197297T3 (da) 2005-04-18
PT1197297E (pt) 2005-04-29
ES2233322T3 (es) 2005-06-16
DE60016596T2 (de) 2005-12-08
ATE284295T1 (de) 2004-12-15
EP1197297A1 (fr) 2002-04-17
DE60016596D1 (de) 2005-01-13

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