EP1174216B1 - Machine de sablage - Google Patents
Machine de sablage Download PDFInfo
- Publication number
- EP1174216B1 EP1174216B1 EP01116976A EP01116976A EP1174216B1 EP 1174216 B1 EP1174216 B1 EP 1174216B1 EP 01116976 A EP01116976 A EP 01116976A EP 01116976 A EP01116976 A EP 01116976A EP 1174216 B1 EP1174216 B1 EP 1174216B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ice
- machine according
- pipe
- crushing
- water
- 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
Links
Images
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 present invention relates to a sandblasting machine comprising at minus a sand tank, a pipe into which the sand is introduced mixed with pressurized air, a sandblasting nozzle, means for produce ice, these means being formed from a water supply and a pressurized gas supply, and a device for grinding the ice cream.
- US Patent 4,924,643 relates to another device for processing parts in which the part to be treated is blown simultaneously particles of pellets and particles of carbon dioxide. This device is particularly intended for plastic parts or coated with plastic material.
- European publication EP 0316 264 relates to a device for stripping and removal of surface layers in which ice particles are accelerated by a jet of water coming out of a pressure nozzle and transported with water. Additives prevent particles melt in the water jet.
- sandblasting machines in which sand is mixed with ice before being ejected under pressure.
- This ice is produced by introducing water into a pipe in which the sand circulates, then by introducing a gas such as CO 2 under high pressure into this pipe. The expansion of the gas produces a sudden lowering of the temperature and the freezing of the water.
- sand ejection is often interrupted by the user. During periods of interruption, ice builds up in the hose until it is completely clogged. This stops the machine until the ice has completely melted or has been removed mechanically.
- the present invention proposes to overcome these drawbacks by realizing a sandblasting machine in which the mixture of sand and ice is homogeneous and in which ice does not accumulate in the pipe.
- the ice crushing device comprises a frame provided with an opening in contact with the inside of the pipe, and in that a conical piece is disposed in said opening.
- said conical piece may include a large opening on the side of the tank and a small opening on the side of the nozzle.
- the ice crushing device has at least two ice crushing elements. These elements of ice crushing are each advantageously formed of a rotary axis integral with grinding members.
- the grinding members can be rods.
- the grinding elements preferably include means for pivot around the axes.
- These pivoting means include advantageously a wheel secured to each axle and a motor wheel drive.
- the pipe may also have at least one air inlet between the exterior and the inside of the pipe, near the conical part.
- the pipe has several inlets air distributed around its periphery.
- the water supply advantageously comprises a water inlet and a heating element arranged to prevent water from freezing in the water supply.
- the pipe may include a supply of coolant.
- the machine 10 essentially comprises a sand tank 11, a pipe 12, a sandblasting nozzle 13 and a device for ice crushing 14.
- sand and pressurized air are introduced from the tank 11 in the pipe 12 and are ejected by the sandblasting nozzle 13.
- the ice grinding device 14 is arranged on the pipe. It has a frame 15 in which are housed grinding elements 16, which are at number of four in the example shown. Each grinding element 16 is formed of an axis 17 on which are fixed grinding members such as 18 rods or blades. The axes 17 and the rods 18 of all the elements 16 are arranged so that the rods of an element 16 are close to the rods of the adjacent elements.
- the axes 17 of the grinding elements pass through the frame 15 and are integral each of a wheel such as a pulley 19 or a toothed wheel.
- the pulleys are driven by a motor 20 so that the starting of the motor causes the rotation of the grinding elements and their rods.
- the frame has a water inlet 21, disposed towards the top of the frame and an inlet 22 for gas such as CO 2 under pressure.
- a heating body 28 is placed around the water inlet 21 and maintains this inlet at a temperature above zero degrees.
- the frame has an opening 23 in contact with the interior of the pipe.
- the interior of the pipe has a conical piece 24 having a large opening 25 on the side of the tank 11 and a small opening 26 on the side of the nozzle 13.
- the pipe 12 also has several air inlets 27 arranged near the large opening 25 of the conical part. These air inlets connect the outside of the pipe to the outside of the conical part.
- the pipe 12 can also include a supply 29 of coolant such as liquid CO 2 , disposed downstream of the grinding device 14. The function of this CO 2 is to keep the installations at a sufficiently low temperature, even when the grinding device is not used.
- the machine according to the invention operates in the following manner. Sand and pressurized air are introduced from the reservoir 11 into the pipe 12. The sand and the air pass through the conical part 24 in the direction of the nozzle 13. Water is introduced into the frame 15 of the device grinding 14, at the top of it, by the water inlet 21. Pressurized gas is also introduced into this frame by the gas inlet 22. This gas can be CO 2 at a pressure of about 25 bars for example, or liquid nitrogen, or any other compound sufficiently refrigerant to cause freezing of the water. Upon arrival in the frame, the gas expands and causes cooling, which causes the water to freeze. The heater 28 keeps the area near the water inlet 21 at a temperature above zero degrees so that the water does not freeze in this area and the water inlet does not get clogged. In addition, when water is not injected into the grinding device, air is introduced therein via the water inlet 21 in order to prevent water from stagnating in this inlet.
- the ice thus formed falls into the grinding device, towards the pipe.
- This ice is crushed between the rods 18 which are rotated by through the motor 20, the pulleys 19 and the axes 17. In this way, the ice does not settle and the pieces of ice have a dimension less than the spacing of the rods.
- the air inlets 27 entrain the ice falling in the pipe towards of the nozzle 13 and prevent it from depositing on the conical part 24.
- the ice is then mixed with the sand in a particularly homogeneous way.
- the mixture is then sprayed onto the support to be sanded.
- the number of grinding elements can be variable, as can the number of rods and their spacing.
- the rods 18 are shown as being vertical in FIG. 1. They could also be horizontal and rotate around vertical axes. It is also possible to inject a coolant such as CO 2 into the tank 11.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Disintegrating Or Milling (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Gas-Filled Discharge Tubes (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Description
- la figure 1 est une vue schématique partielle en coupe d'une machine de sablage selon l'invention, et
- la figure 2 est une vue de face d'un détail de la machine de la figure 1.
Claims (11)
- Machine de sablage comportant au moins un réservoir de sable (11), un tuyau (12) dans lequel est introduit le sable mélangé à de l'air sous pression, une buse de sablage (13), des moyens pour produire de la glace, ces moyens étant formés d'une alimentation en eau et d'une alimentation en gaz sous pression, et un dispositif de broyage de la glace (14), caractérisée en ce que le dispositif de broyage de glace (14) comporte un bâti (15) pourvu d'une ouverture (23) en contact avec l'intérieur du tuyau (12), et en ce qu'une pièce conique (24) est disposée dans ladite ouverture (23).
- Machine selon la revendication 1, caractérisée en ce que la pièce conique (24) comporte une grande ouverture (25) du côté du réservoir (11) et une petite ouverture (26) du côté de la buse de sablage (13).
- Machine selon la revendication 1, caractérisée en ce que le dispositif de broyage de glace (14) comporte au moins deux éléments (16) de broyage de la glace.
- Machine selon la revendication 3, caractérisée en ce que les éléments de broyage (16) de la glace sont chacun formés d'un axe rotatif (17) solidaire d'organes de broyage.
- Machine selon la revendication 4, caractérisée en ce que les organes de broyage sont des tiges (18).
- Machine selon la revendication 4, caractérisée en ce que les éléments de broyage (16) comportent des moyens de pivotement autour des axes (17).
- Machine selon la revendication 6, caractérisée en ce que les moyens de pivotement comportent une roue (19) solidaire de chaque axe (17) et un moteur (20) d'entraínement des roues.
- Machine selon la revendication 1, caractérisée en ce que le tuyau (12) comporte au moins une entrée d'air (27) entre l'extérieur et l'intérieur du tuyau, à proximité de la pièce conique (24).
- Machine selon la revendication 8, caractérisée en ce que le tuyau (12) comporte plusieurs entrées d'air (27) répartis sur sa périphérie.
- Machine selon la revendication 1, caractérisée en ce que l'alimentation en eau comporte une arrivée d'eau (21) et un corps de chauffe (28) agencé pour empêcher l'eau de geler dans l'arrivée d'eau.
- Machine selon la revendication 1, caractérisée en ce que le tuyau (12) comporte une alimentation (29) en fluide réfrigérant.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01408/00A CH694158A5 (fr) | 2000-07-17 | 2000-07-17 | Machine de sablage. |
CH14082000 | 2000-07-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1174216A2 EP1174216A2 (fr) | 2002-01-23 |
EP1174216A3 EP1174216A3 (fr) | 2002-12-11 |
EP1174216B1 true EP1174216B1 (fr) | 2004-09-29 |
Family
ID=4565453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01116976A Expired - Lifetime EP1174216B1 (fr) | 2000-07-17 | 2001-07-12 | Machine de sablage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1174216B1 (fr) |
AT (1) | ATE277718T1 (fr) |
CH (1) | CH694158A5 (fr) |
DE (1) | DE60105908T8 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010020618B4 (de) | 2009-05-26 | 2014-05-28 | Jürgen von der Ohe | Verfahren zur Herstellung von CO2-Pellets oder von CO2-Partikeln mit erhöhter mechanischer Härte und Abrasivität |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3844648C2 (fr) * | 1987-06-23 | 1992-02-20 | Taiyo Sanso Co. Ltd., Osaka, Jp | |
DE3738246A1 (de) * | 1987-11-11 | 1989-05-24 | Werner & Zeisse Gmbh & Co | Verfahren und vorrichtung zum entfernen von beschichtungen und verunreinigungen |
FR2627121B1 (fr) * | 1988-02-12 | 1994-07-01 | Carboxyque Francaise | Procede, installation et buse de projection pour le traitement de pieges par soufflage de grenaille |
FR2630668B1 (fr) * | 1988-04-28 | 1990-11-16 | Commissariat Energie Atomique | Procede et dispositif de fabrication de billes de glace et application a la projection de ces billes de glace pour les traitements de surface |
CA2113291A1 (fr) * | 1993-01-26 | 1994-07-27 | William D. Fraresso | Appareil d'alimentation en glace en temps reel pour systeme de grenaillage a glace |
AU6627794A (en) * | 1993-04-16 | 1994-11-08 | Ice Blast International Ltd. | Ice blast particle transport system for ice fracturing system |
JP2632141B2 (ja) * | 1995-06-23 | 1997-07-23 | ショーボンド建設株式会社 | 研掃方法 |
-
2000
- 2000-07-17 CH CH01408/00A patent/CH694158A5/fr not_active IP Right Cessation
-
2001
- 2001-07-12 AT AT01116976T patent/ATE277718T1/de not_active IP Right Cessation
- 2001-07-12 DE DE60105908T patent/DE60105908T8/de not_active Expired - Fee Related
- 2001-07-12 EP EP01116976A patent/EP1174216B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE60105908T2 (de) | 2006-02-09 |
DE60105908D1 (de) | 2004-11-04 |
EP1174216A2 (fr) | 2002-01-23 |
CH694158A5 (fr) | 2004-08-13 |
EP1174216A3 (fr) | 2002-12-11 |
DE60105908T8 (de) | 2006-04-27 |
ATE277718T1 (de) | 2004-10-15 |
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