EP1197297B1 - Dispositif de production et de projection de particules solides sublimables - Google Patents
Dispositif de production et de projection de particules solides sublimables Download PDFInfo
- 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
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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)
- Glanulating (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- Developing Agents For Electrophotography (AREA)
Description
- un moyen pour préparer des particules solides sublimables ;
- un moyen recevant les particules solides sublimables préparées et dans lequel lesdites particules sont propulsées ou déplacées vers une extrémité de projection, voire un moyen de projection.
- un récipient agencé pour recevoir des particules solides sublimables ou un ou des blocs ou éléments de matière solide sublimable,
- un entonnoir prolongeant ledit récipient, le bas dudit entonnoir communiquant par un conduit à l'extrémité de projection,
- un disque situé entre le récipient et l'entonnoir, ledit disque présentant une face supérieure tournée vers le réservoir et une face inférieure tournée vers l'entonnoir, ladite face supérieure étant agencé pour être en contact avec des particules ou bloc(s) ou élément(s) de CO2 solide, ladite première face présentant au moins une série de dents, les dents du disque étant agencées pour former, lors de la rotation du disque, des particules de diamètre moyen inférieur à 6mm à partir des particules ou bloc(s) présents dans le récipient et dans lequel les dents sont associées à un ou des passages pour permettre le passage de particules formées au travers du disque, lesdites particules passant au travers du disque tombant dans ledit entonnoir
- un moyen pour entraíner en rotation le disque.
Le moyen d'entraínement du disque est par exemple un moyen permettant de régler ou de contrôler la vitesse de rotation du disque. La vitesse de rotation du disque peut par exemple être réglée ou contrôlée entre 1 tour/minute et 500 tours/minute, en particulier entre 5 et 100 tours/minutes, avantageusement entre 10 et 75 tours/minutes. Le réglage de la vitesse de rotation du disque peut être continu ou progressif et/ou discontinu ou avec pallier de vitesse prédéterminée. La vitesse du disque dépendra également du diamètre du disque, du nombre de dents, de la taille des dents, de la forme des dents, etc.
- la figure 1 est une vue schématique d'un dispositif suivant l'invention ;
- la figure 2 est une vue de dessus d'un disque utilisé dans le dispositif de la figure 1 ;
- la figure 3 est une vue en coupe d'un détail du disque de la figure 2 ;
- la figure 4 est une vue en coupe le long de la ligne IV-IV du détail de la figure 3 ;
- la figure 5 est une vue d'un détail d'un autre disque ;
- la figure 6 est une vue en coupe selon la ligne VI-VI du détail de la figure 5,
- la figure 7 est une vue schématique d'un autre dispositif suivant l'invention.
- un moyen 1 pour préparer des particules solides sublimables ; et
- un moyen 2 recevant les particules solides sublimables préparées et dans lequel lesdites particules sont propulsées vers une extrémité de projection 25 avantageusement munie d'un moyen ou tête de projection.
- un récipient 10 agencé pour recevoir des particules solides sublimables ou un bloc de matière solide sublimable, ledit récipient présentant une couche d'isolation 11 et un couvercle 12 muni d'une couche isolante 13,
- un disque 14 agencé pour être en contact sur une première de ses faces avec des particules ou bloc de matière solide sublimable, ladite première face présentant une série de dents 15,
- un moyen 16 pour entraíner en rotation le disque 14, ce moyen tel un moteur électrique ou pneumatique est maintenu en position dans le récipient au moyen de bras 17.
Il peut être éventuellement intéressant de prévoir un organe de raclage 51 pour racler la face du disque opposée à celle portant les dents 15. Un tel organe peut être utile pour éviter une éventuelle agglomération de particules sur cette face opposée.
Claims (13)
- Dispositif de production et de projection de particules solides sublimables de CO2, ledit dispositif comprenant au moins :un moyen (1) pour préparer des particules solides sublimables ;un moyen (22) recevant les particules solides sublimables préparées et dans lequel lesdites particules sont propulsées vers une extrémité de projection (25),un récipient (10) agencé pour recevoir des particules solides sublimables ou un ou des blocs ou éléments de matière solide sublimable (18),un entonnoir (20) prolongeant ledit récipient (10), le bas dudit entonnoir communiquant par un conduit (21,24) à l'extrémité de projection (25),un disque (14) situé entre le récipient (10) et l'entonnoir (20), ledit disque (14) présentant une face supérieure tournée vers le récipient (10) et une face inférieure tournée vers l'entonnoir (20), ladite face supérieure étant agencé pour être en contact avec des particules ou bloc(s) ou élément(s) de C02 solide (18), ladite première face présentant au moins une série de dents (15), les dents (15) du disque étant agencées pour former, lors de la rotation du disque, des particules (19) de diamètre moyen inférieur à 6mm à partir des particules ou bloc(s) (18) présents dans le récipient (10) et dans lequel les dents (15) sont associées à un ou des passages (15A) pour permettre le passage de particules formées au travers du disque (14), lesdites particules (19) passant au travers du disque (14) tombant dans ledit entonnoir (20)un moyen pour entraíner en rotation le disque.
- Dispositif suivant la revendication 1, caractérisé en ce que le disque (14) forme un fond du récipient (10), de sorte que les particules (18) du récipient (10) sont au moins poussées ou entraínées vers le disque grâce à la gravité.
- Dispositif suivant la revendication 1 ou 2, caractérisé en ce que le disque (14) présente des dents (15) agencées pour râper les particules du récipient (18) en plus petites particules (19).
- Dispositif suivant l'une des revendications 1 à 3, caractérisé en ce que les dents (15) sont disposées en séries successives, chaque série s'étendant le long d'une radiale du disque.
- Dispositif suivant l'une des revendications 1 à 4, caractérisé en ce que les dents (15) ont un bord libre en forme de U ou de triangle, et présentent des moyens (15A) pour guider les particules formées au travers du disque (14).
- Dispositif suivant la revendication 1, caractérisé en ce que le disque présente au moins une série de dents (15) adaptées pour former au moins une arête aux particules formées (19), des dents étant avantageusement situées de manière à définir des parcours différents lors de la rotation du disque.
- Dispositif suivant l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comporte au moins un racloir coopérant avec le disque.
- Dispositif suivant la revendication 7, caractérisé en ce qu'il comporte au moins un racloir agencés pour exercer un effort de raclage sur la face du disque (14) portant les dents (15) ou sur les particules ou blocs de C02 en contact ou dirigés vers la face du disque (14) portant les dents (15).
- Procédé de traitement d'au moins une face d'un objet par projection de particules de matières sublimables préparées par un dispositif selon,l'une quelconque des revendications 1 à 8.
- Procédé suivant la revendication précédente, caractérisé en ce qu'on utilise un ou des blocs, granules ou pellets contenant du CO2 solide pour préparer des particules de diamètre inférieur à 6 mm.
- Procédé suivant l'une quelconque des revendications 9 et 10, caractérisé en qu'on utilise un disque portant des dents adaptés pour former des particules présentant au moins une arête.
- Procédé suivant l'une quelconque des revendications 9 à 11, caractérisé en ce qu'au moins la gravité pousse le ou les blocs, granules ou pellets vers le disque (14) portant des dents (15).
- Moyen de préparation de particules solides sublimables pour un dispositif selon l'une des revendications 1 à 8, ce moyen étant tel que défini à la revendication 1 et comportant avantageusement l'une ou plusieurs caractéristiques telles que définies aux revendications 2 à 8.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PT00870223T PT1197297E (pt) | 2000-10-04 | 2000-10-04 | Dispositivo para a producao e a projeccao de particulas solidas sublimaveis |
DK00870223T DK1197297T3 (da) | 2000-10-04 | 2000-10-04 | Apparat til fremstilling og udkastning af sublimerbare, faste partikler |
EP00870223A EP1197297B1 (fr) | 2000-10-04 | 2000-10-04 | Dispositif de production et de projection de particules solides sublimables |
DE60016596T DE60016596T2 (de) | 2000-10-04 | 2000-10-04 | Vorrichtung zum Erzeugen von und zum Strahlen mit schmelzbaren Teilchen |
ES00870223T ES2233322T3 (es) | 2000-10-04 | 2000-10-04 | Dispositivo de produccion y de proyeccion de particulas solidas sublimables. |
AT00870223T ATE284295T1 (de) | 2000-10-04 | 2000-10-04 | Vorrichtung zum erzeugen von und zum strahlen mit schmelzbaren teilchen |
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 (fr) |
AT (1) | ATE284295T1 (fr) |
BE (1) | BE1014045A6 (fr) |
DE (1) | DE60016596T2 (fr) |
DK (1) | DK1197297T3 (fr) |
ES (1) | ES2233322T3 (fr) |
PT (1) | PT1197297E (fr) |
Families Citing this family (2)
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)
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 |
-
2000
- 2000-10-04 DE DE60016596T patent/DE60016596T2/de not_active Expired - Lifetime
- 2000-10-04 AT AT00870223T patent/ATE284295T1/de not_active IP Right Cessation
- 2000-10-04 ES ES00870223T patent/ES2233322T3/es not_active Expired - Lifetime
- 2000-10-04 EP EP00870223A patent/EP1197297B1/fr not_active Expired - Lifetime
- 2000-10-04 PT PT00870223T patent/PT1197297E/pt unknown
- 2000-10-04 DK DK00870223T patent/DK1197297T3/da active
-
2001
- 2001-03-08 BE BE2001/0153A patent/BE1014045A6/fr not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2233322T3 (es) | 2005-06-16 |
DE60016596D1 (de) | 2005-01-13 |
ATE284295T1 (de) | 2004-12-15 |
DK1197297T3 (da) | 2005-04-18 |
EP1197297A1 (fr) | 2002-04-17 |
DE60016596T2 (de) | 2005-12-08 |
PT1197297E (pt) | 2005-04-29 |
BE1014045A6 (fr) | 2003-03-04 |
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