EP1858669A2 - Micro-ponceuse a effet de ponçage par disque air-abrasif - Google Patents
Micro-ponceuse a effet de ponçage par disque air-abrasifInfo
- Publication number
- EP1858669A2 EP1858669A2 EP06726031A EP06726031A EP1858669A2 EP 1858669 A2 EP1858669 A2 EP 1858669A2 EP 06726031 A EP06726031 A EP 06726031A EP 06726031 A EP06726031 A EP 06726031A EP 1858669 A2 EP1858669 A2 EP 1858669A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- ejection
- disc
- tool according
- plate
- pneumatic tool
- 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.)
- Granted
Links
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- 230000001133 acceleration Effects 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 35
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003082 abrasive agent Substances 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 13
- 238000005299 abrasion Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 238000010926 purge Methods 0.000 claims description 8
- 210000000056 organ Anatomy 0.000 claims description 7
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- 229920003023 plastic Polymers 0.000 claims description 6
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/026—Fluid driven
-
- 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
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
-
- 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
Definitions
- the present invention relates to a pneumatic sanding micro-sander by air-abrasive disc effect.
- the fields of application of the present invention are: dermatology, the cleaning of fine polychromies and very fragile sculptures and all other fields requiring the finest possible cleaning of micro-pellicular deposits.
- microdermabrasion There is already in dermatology a method of abrasion of the skin called microdermabrasion. It is a method of digging the superficial layer of the skin by mini-sanding. This method consists in projecting compressed air loaded with abrasives in the form of powder with the aid of a compressor. These abrasive powders are in fact microcrystals of corundum or alumina oxide, strongly angular and particle size often less than 50 microns. These abrasives are sprayed at very low pressures of the order of about 1 to 2 bars, through a small nozzle about 1 millimeter in diameter. The effect sought by the action of this mini-sanding is to remove the skin layer of the surface of the skin to stimulate the production of new skin cells, in order to force the epidermis to regenerate.
- Laser emission also produces a number of mechanical shock waves that propagate through the material.
- the cleaning laser ranks in class 4, its emission (LEA) is a billion times stronger than the solar emission. This makes it a tool that requires the compulsory use of specialized engineers and thus makes the use of the laser difficult.
- the present invention seeks to overcome all these disadvantages. For this, it offers in restoration of monuments, dermatology and all other industrial areas of ultrafine sanding, a new tool particularly powerful, which is manageable, simple and convenient to use.
- the tool of the present invention is presented as a pneumatic micro-sander. But it cleans, without abrasive disc. Sandpaper, corundum, alumina oxide, or other abrasive discs found on a conventional sander are replaced by a high-pressure compressed air cushion that serves as a disc. is loaded with corundum, alumina oxide, etc.
- Sandblasting consists in projecting, under compressed air, using a nozzle, sand on a support to be stripped.
- Sandblasting is a particularly corrosive method.
- For this it is known to replace the sand of large particle size, close to 2 millimeters, with abrasive in the form of powder with a particle size of 80 to 100 micrometers. Harder and finer powder.
- abrasive in the form of powder with a particle size of 80 to 100 micrometers.
- harder and finer powder because of the great fragility of some media and the need for business performance, despite the fineness of the powder, many abrasion problems persist. This is why the applicant in his previous patents, in particular the patents FR-2,685,027 and FR-2,684,900, proposed new technical solutions for solving the problems of delicacy and work efficiency.
- the present invention aims to overcome all these disadvantages and drawbacks of current stripping processes that are on the market. Especially in the field of microdermabrasion and in all other industrial fields of ultrafine sanding.
- the present invention makes it possible to manufacture a manual tool.
- This tool is used as a pneumatic micro-sander.
- the sanding work is done almost by contact, a few millimeters from the surface to be stripped.
- This new tool acts as a pneumatic micro-sander, whose abrasive disk would be replaced by a high-pressure air cushion, in which a projected abrasive rotates.
- the sanding work is no longer done by contact with an abrasive disc, as with a sander, but by contact with a disc of high pressure compressed air loaded with abrasive.
- Pneumatic cleaning and pickling sander which has the particularity that the disk or turntable that equips this sanding tool has one or more thin members pierced with a greater or lesser number of orifices.
- ejection which may even be simple holes or slots, said holes or slots being responsible for discharging after bursting on a jet-cone a mixture of compressed air and powder from at least one duct nozzle acceleration, and in that said disk or plate which comprises these ejection members is rotated at very high speeds, these speeds are greater than 100 revolutions per minute, often between 1000 and 20,000 revolutions per minute , and may even exceed 30,000 revolutions per minute, but being more generally between 4,000 and 12,000 revolutions per minute.
- the very high speeds of rotation of the plate or disk are obtained using a mini-turbine of the pneumatic motor type.
- the axis of rotation of the disk or plate acts as a nozzle acceleration channel. But, in addition, the functions of acceleration and ejection of this nozzle are dissociated in two parts.
- the nozzle acceleration channel is common to all ejection ports, such as holes or slots. It opens on a jet bent cone charged with bursting the jet of compressed air and abrasives at the exit of the nozzle acceleration channel in order to direct the abrasive air flow towards ejection holes, holes-type or slots.
- These ejection members may be no more than simple holes or slots drilled in washers or platelets tungsten carbide.
- these organs can be well, excessively thin and less than 400 micrometers in diameter, or even less than 100 micrometers, while avoiding any risk of clogging.
- These ejection members which may be in the form of washers or platelets are inserted into a disc or tray. This disk or tray, relieved of the weight and size of nozzles, can be driven in rotation at very high speeds. These rotary speeds obtained using a pneumatic mini-turbine are excessively fast and understood as ranging from 1000 to 20,000 revolutions per minute and can even in some cases exceed 30,000 revolutions per minute. What allows for all these characteristics, to be able to work if necessary, at high pressure. That is to say, more than 5 or 7 bars of pressure.
- this manual tool Due to its low weight and bulk characteristics and its surfacing qualities due to sanding effect on abrasive powder-laden air cushion, this manual tool makes it possible to sand particularly delicate substrates such as the skin epidermis, the fine polychromies , very fragile sculptures and all types of more or less fragile supports.
- the tool can also be directly adapted to an industrial robot arm and automatically provide jobs such as aircraft and automotive sanding.
- the present invention proposes to limit the maximum dust emission and increase the quality of stripping, to use exhaust holes as thin as possible. These openings may even be less than 400 micrometers. See even finer, in some cases, this fineness can be up to 10 micrometers.
- the principle of the invention proposes to dissociate in two the acceleration and ejection functions of the nozzle.
- This principle makes it possible to use ejection orifices, of the hole or slot type, extremely fine, which may even be less than 400 micrometers in diameter, up to 100 microns, or less, without clogging in the nozzle channel.
- the nozzle By splitting into two separate functions, the nozzle, all the ejection ports, have their acceleration channel in common.
- the acceleration channel of all the nozzles being common and placed in the center of the tool, it serves in parallel with the axis of rotation of the disk or plate. Placed in the center, it opens on a jet breeze cone.
- This cone is responsible for bursting the jet of compressed air and abrasives at the outlet of the nozzle acceleration channel, in order to direct the abrasive air flow towards the ejection ports.
- These ejection ports pierced in a tungsten carbide member may be nothing more than simple holes or slots. Which tungsten carbide pieces provided with said ejections orifices, are nested in a disk or plate.
- This disc or tray relieved of the weight and bulk of many nozzles, can be driven at very high speeds of rotation. That is to say at speeds above 500 rpm and averaging between 4,000 and 12,000 rpm, see more.
- the first part of the nozzle which has the function of acceleration is arranged upstream. It is an acceleration channel common to all ejection ports. It is a classic nozzle duct of about 2 to 4 millimeters. It is this principle that removes the nozzles placed in the rotating disc and replace them with washers or thin tungsten carbide inserts pierced by simple holes or slots. This is what allows very high speeds of rotation. It also makes it possible to use the finest ejection diameters possible, up to 10 micrometers, without clogging in the nozzle acceleration channel.
- the present invention makes it possible, unlike all other methods, to be able to work at high pressure.
- the present invention also makes it possible to virtually no longer make dust.
- the air consumption and the volume of dust decreases in very large proportions. Indeed, 24 nozzles of 1 millimeter consume at 7 bar more than 2000 liters of air per minute. With tungsten carbide washers or plates pierced with 200 micrometer holes, the air consumption for 24 ejection ports is only 70 liters per minute at 7 bar.
- this principle of very low air consumption allows to double or triple the volume of abrasive projected per liter of air. The present invention therefore allows to project much more abrasive with infinitely less air. And so by the very high speed of rotation of the disc, to gain in efficiency, especially when one increases the pressure and that one works as close as possible to the support to be stripped.
- the suction mode by venturi will often be recommended for its ability to dilute the powder air mixture.
- the additional principle is also to use powders particle size highly calibrated in ranges of 10 micrometers for example.
- the abrasive will be placed in a mini pressure vessel fitted directly to the tool or very close to the operator.
- This mini tank will be equipped with adjustment means allowing the opening and closing of the flow of the abrasive. It will be equipped in the flow part of a small flexible flexible tube easy to tighten, to allow a very fine and very precise dosage to the gram near the powder. This small flexible tube which is very flexible under the effect of compressed air will also act as a vibrator, to facilitate the flow of the abrasive.
- This mini tank can be equipped with a small pneumatic cylinder or a blowing nozzle to purge sequentially the flow area. For the finest jobs, the entire device goes through a control cabinet.
- a two-way valve in the cabinet makes it possible to circulate compressed air without abrasives steadily.
- the tool is equipped with a button to actuate the output of the abrasive from the tank. This allows from the tool to close the arrival of the abrasive sequentially and work sequentially timed arrival of the powder. This principle also allows for the constant purging of the channels during work.
- a system can be installed in the control cabinet to automatically close in a sequence of a few seconds, this valve outlet of the abrasive. Thus, only compressed air circulates in the device, except for certain fractions of seconds, or abrasive mixes with the air cushion at high pressure.
- the sanding tool is defined more precisely as follows:
- Teflon rotating disk consists of a thin Teflon rotating disk, about 1 cm screwed into a tapered housing of aluminum, steel or Teflon.
- the diameter of this disc or plate can be 20 millimeters and up to 250 millimeters.
- this disk has an average diameter of 110 to 250 millimeters.
- this disc has an average diameter of 80 to 140 millimeters.
- this disc has an average diameter of 25 to 50 millimeters.
- each ejection member is on average 2 to 3 millimeters. But this thickness can also be greater than 3 millimeters.
- the diameter of each hole drilled in the tungsten carbide ejection member is preferably 500 microns. But this diameter may also be larger up to 1 to 2 millimeters or thinner, up to 10 micrometers. It is also possible to replace the ejection holes, by slots, which will be principle, longer than wide. And to use extremely thin slits of the order of less than one hundred micrometers, the tungsten carbide washers or washers called ejections organs, will no longer be machined, but two halves, will be assembled in a set of tungsten carbide more great.
- the principle of the invention is that the acceleration ducts of each ejection orifice are grouped into a common channel.
- the diameter of this duct common to all the ejection orifices which is also advantageously, the axis of rotation of the disk is preferably between 2 and 4 millimeters. But it can also be like all nozzle channels, between 1 and 8 millimeters.
- the present invention makes it possible to greatly lighten the device, which becomes an easily manageable manual tool, such as a micro-sander.
- the very heavy parts of all the nozzles are replaced by a single nozzle duct common to all the ejection ports.
- the disc may thus be less bulky. Reduced by the thickness of the nozzle acceleration ducts and the weight of the nozzles, this principle makes it possible to drive the disk or turntable at very high speeds, of more than 500 revolutions per minute, without excessive vibrations or blockage of the rotor. device.
- the shaft of the pneumatic motor or axis of rotation which transmits the rotation to the disk or plate can, if it is pierced in the direction of its length have a dual function and act as a common nozzle channel allowing to accelerate the air-abrasive mixture.
- the embodiment of the tool of the invention is thus advantageously from an adapter part of the angle of a pneumatic motor. Part in which, the central axis of the angle gear is pierced in the direction of its length. It thus serves as an acceleration conduit common to all the exhaust ports and axis of rotation of the disc or plate.
- the nozzle which is already equipped with two sealed bearings, by equipping it with 5 thin vanes, can have a dual function: nozzle and rotor. And by adding flanges and a double cylinder, the assembly becomes a motor, which can directly rotate the plate.
- the nozzle of the tool being in the axis and of fine diameter of about 3 millimeters perhaps at the same time the motor shaft.
- the nozzle being in the axis and with a diameter of about 3 millimeters, can also serve as a shaft of the angle of a pneumatic motor.
- the tool can be equipped with an integrated system for dust extraction. Because the projection disc can rotate at speeds of 10 to 20,000 rpm, it can be equipped at the periphery with plastic or aluminum centrifugal blade pallets directly connected to a small vacuum bag or connected to a second one. more distant suction source, industrial centrifugal vacuum cleaner type.
- Another solution is to blow compressed air at high speed through an annular gap of very small width located directly on the projection tool, in order to accelerate the speed of the air in the projection casing. aspirate the dust produced.
- the compressed air pushed into this fine annular gap may even advantageously come from the exhaust of the pneumatic motor which ensures the rotation of the disk or plate.
- the invention has the following particularity: the acceleration and ejection functions of this nozzle are split into two parts. Which allows without clogging, in the long duct of acceleration of the nozzle, to simply use at the outlet, ejection organs, such as holes or slots excessively thin, may even be less than 400 micrometers in diameter.
- the rotary nozzle channel or not is common to all the ejection orifices, it opens on a jet-cone charged to burst the air-powder mixture in order to direct it towards these ejection organs, holes or slots.
- These members are arranged more or less in a disk or plate and in that said disk or plate is rotated preferably by motor means of the mini-turbine type, at very high speeds, these speeds are greater than 100 rpm, often between 1000 and 20,000 rpm, and may even exceed 30,000 rpm, but generally between 4,000 and 12,000 rpm.
- the tool can also be directly adapted to an industrial robot arm and provide work such as sanding aircraft cabins and automobile bodies.
- the present invention relates to a pneumatic sander without a sanding disc, which abrasive powder-laden air-blast.
- This hand tool can sand particularly delicate substrates such as skin epidermis, fine polychromies, very fragile sculptures and all types of more or less fragile supports.
- the multiple nozzle acceleration ducts of the powder projection ports are replaced by a common general nozzle duct;
- the jet of the jet of compressed air and abrasive powder is burst by a jet-cone; the latter is responsible for modifying the exit angle of the jet leaving the nozzle acceleration channel to direct it towards the ejection organs, such as holes or slots that are located in the disk or turntable;
- the multiple holes or ejection slots of the abrasive powder are advantageously formed by drilling, straight or inclined and in a material resistant to abrasion ejection of the abrasive, as is for example, the carbide of tungsten; the thickness of each washer or wafer is between 1 and 5 millimeters, and said wash or washers are fixed in greater or lesser number, in a straight or slightly inclined manner on the disc or tray which closes the nozzle;
- the disk or plate that contains the washers or plates pierced with fine holes is driven at very high speed
- the ejections holes in the washers or platelets are of a diameter end, between 10 micrometers and 4 millimeters;
- the slots pierced in the plates are of a length of several millimeters or tens of millimeters and of a fine width of between 10 micrometers and 4 millimeters;
- the amount of washers or platelets inserted into the Teflon disk is multiple, the number of ejection orifices, drilled in these bodies of wear-resistant material of abrasion, too.
- the thickness of the washers or platelets is between 1 millimeter and 5 millimeters;
- the disc or plate (24) is on its entire surface, the ejection member of small thickness, abrasion-resistant wear material, and pierced with multiple very fine ejection orifices;
- the disk or plate which supports the washers or platelets with a diameter of between 4 millimeters and 250 millimeters;
- the disc or tray is equipped with a felt or rubber washer to dampen the contact of the tool on the support to be sanded in case of work by contact or closer;
- the fixed parts of the arrival of the air-abrasive mixture and the rotating parts are mounted within a housing, which housing is screwed on a motor or a manual tool type sander or pneumatic grinder;
- the central axis of a pneumatic motor with a bevel gear or a pneumatic motor is used as a nozzle or as a narrow channel for the passage of compressed air and abrasive with a particle size of less than 200 micrometers;
- the pneumatic tool comprises an abrasive powder diffuser which makes it possible to limit the flow of powder to the nearest gram, this latter is in the form of a mini-tank of abrasives, the said mini-tank is equipped in the part flow of a small flexible flexible tube easy to tighten, to allow a very fine and very precise dosage to the gram near the powder.
- This small flexible tube which is very flexible under the effect of compressed air will act as a vibrator, to facilitate the flow of the abrasive.
- This mini tank can be equipped with a small pneumatic cylinder or a blow nozzle to purge sequentially the flow area;
- a control button located on the tool allows to automatically open and close the arrival of the abrasive, which allows to fractionate sequentially, this arrival of the abrasive and to circulate throughout the rest of the just air, in the pipes and ejections, to purge them.
- the nozzle will serve in its external rotor face and will be equipped with 5 thin pallets, a front flange and a rear flange, the assembly will be equipped with a double-wall cylinder pierced with several holes allowing the passage of dry compressed air and clean from a compressor pneumatic and serving to rotate the rotating part of the tool;
- the tool comprises a suction system acting near the working head to suck up the residues in the annular space separating the latter from the wall of the gun, towards an exhaust duct, said suction system comprising means blowing compressed air at high speed through a narrow annular gap, located directly on the projection tool, to suck the dust; compressed air blown by the annular space to suck the dust produced may advantageously come from the exhaust of the air motor;
- the multiple holes or ejection slots of the abrasive are drilled in a washer or a tungsten carbide insert or in any other wear-resistant material of abrasive ejection and the thickness of this washer. or wafer is between 1 and 5 millimeters and one or more of these tungsten carbide washers or plates are fixed on a disc, which disc, aims to close the nozzle;
- the powder used is between 1 and 200 microns and this Nullometry is highly calibrated in 10 micron ranges;
- the disc is equipped with means such as a self-tightening mandrel making it possible to quickly fix or remove the disc or the plate so as to change it and thus adapt different types of disc or disc, of greater or lesser diameter and having orifices; ejection more or less fine.
- the disc or tray is also equipped in its center or the periphery of an eccentric responsible for exerting an automatic movement allowing the tool during the stripping work, to slide on the support to be sanded;
- the device of the invention comprises, upstream, a compressor which supplies dry and clean compressed air.
- the working pressure supplied by the compressor is between 1 and 10 bar. For certain types of work, by the characteristics of the present invention, this pressure may even be greater than 10 bars. Can be even 20 or 25 bar for hard or hard media.
- FIG. 1 is a general view, in perspective, of the sanding tool
- FIG. 2 is a front view of a disk or projection plate provided with ejection holes and tungsten carbide plates;
- FIG. 3 is a schematic sectional view of the sanding tool
- FIG. 4 is a sectional view of a mini abrasive tank that can equip the sanding tool
- FIG. 5 is a side view of a tool for cleaning polychrome
- FIG. 6 is a front view of the cleaning disk equipping the tool with the Figure 5;
- FIG. 7 is a tungsten carbide washer pierced with multiple holes, front view and sectional view;
- FIG. 8 is a perspective view of a tool for sanding the skin
- FIG. 9 is a perspective view of a nozzle equipped with vanes for rotation
- FIG. 10 shows a sectional view of a motor assembly - rotating part of the sanding tool, and equipment for the evacuation of compressed air from the engine which is also used for the suction of dust produced by the cleaning ;
- FIG. 11 is a general perspective view, on the side of its internal surface, of a Teflon disk or plate machined to receive tungsten carbide ejection members, and of the view of said ejection member under form of wafer to fit into the machining of the disc, as well as the positioning of two members nested in their groove, the holes that appear in the machined Teflon cavity have no function, except that to make invisible the organs of ejection on the side of the outer face of the disc or turntable;
- FIG. 12 is a sectional view of the projection plate according to Figure 11, suitably mounted on its support.
- the pickling tool according to the invention and FIGS. 1 to 3 comprises a casing 17 in which there is mainly a body of revolution 2, called the axis of rotation of the disk or plate which acts as an acceleration channel common to all the ejection orifices 10 and 11.
- This body of revolution 1, 2 is mounted on a turbine engine 28 for driving the rotating part 1 and the plate or disc 24; this turbine engine 28 also forms a handle for gripping the tool for an operator.
- the rotary part 1 of the tool comprises at its center a nozzle duct, called a channel acceleration 4 common to all the exhaust ports, type holes 10 and 11 slots - the upstream end is connected to a fixed portion 3 of pressurized air inlet loaded or not with abrasive, and - 1 opposite downstream end opens out at a closed space by a disk or plate 24.
- This disk or plate 24 is equipped with several plates 41 of tungsten carbide with a thickness of 3 millimeters and pierced with several very fine holes 10 of the order of 500 micrometers.
- the downstream end of the acceleration channel 4 opens onto a jet-cone 23; this jet-cooling cone 23 extends coaxially with said channel 4 and is situated in the center of the internal surface of the disk or plate 24.
- the acceleration channel 4 has a section of about 3 millimeters and a length of 7 millimeters.
- the disc or plate 24 has in Figure 1 a diameter of 8 centimeters.
- the disc or plate 24 is pierced with many slots. These ejection orifices advantageously have a width of 300 micrometers for a length of 2 millimeters. These slots 11 are distributed along two lines, arranged in a general form of X.
- the above-mentioned high-speed turbine motor 28 is secured to the casing 17 by screwing means 18 (FIG. 3).
- This turbine engine 28 drives in rotation the body of revolution 1 and the disc or plate 24 via a pinion, as for a motor with a bevel gear.
- the housing 17 comprises means 13 for receiving a small abrasive tank, mini tank 5.
- mini tank 5 allows sterilization of the abrasive.
- mini powder tanks are in the form of small bottles.
- the abrasive can be calibrated in size ranges of 10 micrometers.
- the mini-tanks 5 can be used by categories of range with precise granulometry: for example, a powder bottle of between 10 and 20 microns, etc.
- the mini tank 5 is disposed directly on the gun by screwing, allowing its rapid replacement once empty; alternatively, this mini-tank 5 can be deported in the immediate vicinity of the operator or controlled at a greater distance from a control cabinet.
- This mini tank 5 as in Figure 4 contains abrasive powder.
- a small pneumatic jack 15 is also provided to prevent clogging of said plastic tube 21, to sequentially maneuver in translation a rod 37 located at the plastic tube 21, to unclog, if necessary.
- the opening of a button (19) makes it possible to adjust the opening or closing of the compressed air inlet in the tool, and consequently the projected air flow rate.
- the compressed air arrives directly from the compressor into the gun via the nozzle (3).
- the compressed air thus arrives in the sanding gun by the tip (3) not loaded with abrasives.
- the mini-tank When the mini-tank is on the tool, by opening the button (12) the abrasive contained in the tank (5) down through the channel (20). By intervening on this button (12) the volume of abrasive which arrives is regulated, which makes it possible to modulate to the gram close the dosage dosage of abrasives in the compressed air. This is in particular possible by the fact that the flow of the abrasive is through the small flexible and hollow plastic conduit 21, floating and vibrating at the channel 20.
- the small tube (21) can therefore be tightened by the screw (12) to the finest adjustment possible; this also allows by completely closing the screw (12) to purge at all times the ducts by only circulating in the channel (4) and the ejection ports 10 and 11 that clean dry air from the nozzle (3).
- the pressurized air / abrasive particles mixture is then accelerated along the acceleration channel 4 until it reaches the closed space, where the jet-cone 23 ensures its orientation towards the ejection orifices, which are simple holes. or slots 11. These orifices, when it comes to holes, have a preferred diameter of the order of 500 micrometers.
- the compressed air jets are thus rotated at the speed of that of the disk or plate 24;
- the device then applies most often to a few millimeters of the surface to be treated, sometimes almost by contact; at this distance, the sanding is done as if the sander had a compressed air disk in which abrasive powders float.
- the operator wishes to stop his intervention, it is sufficient for him to first close the button (12) of arrival of abrasive particles, then the button (19), pressurized air inlet and finally release the joystick (9), corresponding to the arrival of air in the engine.
- a pneumatic selective valve is used for the entry of air into the motor 28, a pneumatic selective valve for the entry of air through the nozzle 3, a pneumatic valve actuates the opening and the closing the valve 20 abrasive.
- FIG. 5 shows the sanding tool suitable in particular for the treatment of soiling on polychromies.
- This tool is similar to that described above in relation to FIGS. 1 to 3, and differs mainly only in the diameter of its disk or plate 24.
- This disk or plate 24, represented in particular in FIG. has a diameter of 30 millimeters.
- This disk or plate 24, made of Teflon type material comprises two cylindrical through-slots within each of which is introduced a washer 27, provided with a plurality of slots 11, here four in number.
- These washers 27 are made of tungsten carbide, to withstand the forces caused by the abrasion of the particles at the time of their exit through the orifices 11.
- These washers have a diameter of 12 millimeters for a thickness of 2 millimeters.
- FIG. 7 shows an alternative embodiment of tungsten carbide washers 27, which here are equipped with a plurality of aligned cylindrical through holes 10. These ejection holes 10 have a diameter most often between 10 and 500 micrometers.
- the washers 27 described above in connection with FIGS. 5 to 7 may be attached within trays of different diameters more or less. This diameter varies from 4 millimeters to 250 millimeters. The number of washers, and the number of their orifices, are then adapted in greater or lesser number depending on the desired effect.
- the tool shown in Figure 8 is suitable for dermatological microdermabrasion treatments.
- the corresponding tool differs from that described in relation to Figures 1 to 3 only, by the diameter of the nozzle acceleration channel (4), which is a diameter of 1 millimeter.
- the very small diameter of this channel which is also the axis of rotation of the disk or plate, allows the manufacture of a very small tool.
- the ejections orifices located on the disk are eight in number and have a diameter of 300 micrometers.
- FIG. 9 shows an alternative embodiment relating to the mobile part 1 of the body of revolution, which reformed here a pneumatic motor.
- the acceleration channel 4 of the movable part 1 serves as a rotor 38, and is equipped with five thin vanes 31.
- Front 36 and rear 35 plates are provided at each end of the rotor 38.
- This motor 38 is still equipped with a double wall cylinder 34 pierced with several openings 30 allowing the passage of dry and clean compressed air.
- the assembly serves to rotate the disk or plate 24, while conveying at its center 4, the air-powder mixture.
- Figure 10 shows a suction principle for vacuuming the light dust produced. It is observed the presence of an annular gap 32, of small width, through which is blown air at high speed so by venturi effect, to suck the dust. This air flow advantageously comes from the exhaust of the pneumatic motor 28.
- the embodiment of the disk or plate 24 is shown in FIGS. 11 and 12.
- This plate comprises means 40 for inserting carbide tungsten plates 41.
- the disk or plate 24 is made of Teflon, comprises six housings 40 , arranged on the side of its internal surface.
- the dwellings 40 in question are of a generally elongated shape. They each extend radially between the central jet-taper 23 and the peripheral edge of the disc or plate 24; these housings are regularly distributed around the jet cone 23.
- These housings 40 in question are each shaped to receive and maintain one or more tungsten carbide inserts 41 in the form of tongue, plate or plate.
- the housings 40 have a constant section over their entire length. They are machined T-shaped to receive and block the tabs, plates or dishes.
- the tabs, plates or plates 41 are made of tungsten carbide type material, and have a corresponding size identical to that of their housings 40 to be inserted into force. These tabs, or plates 41, which are called platelets 41 have a thickness of 3 millimeters, a length of 12 millimeters and a width of 10 millimeters. They are provided with orifices 10, in the form of through holes. Once in place within its housing 40, the outer face plate 41 is suitably positioned to correspond to the holes 10 "drilled in the disk or Teflon plate 24. The function of this principle of drilling the disc or plate 24 only serves to render the tungsten carbide inserts not visible on the outside of the disc. In practice, the plate 24 in question is mounted aiming on the rotating part 43. The set of disk or plate 24 thus configured, can equip all the tools of the invention.
- the pressurized air-powder mixture is projected onto the jet cone 23, which distributes it over the internal surface of the plate 24.
- the air-powder mixture thus arrives on the plates 41, and passes through the tungsten carbide ejection ports of the tray 24 to produce the sanding abrasive force.
- Said plate 24 is parallel rotated at very high speed. Speeds of the order of 1000 to 30.000 revolutions per minute.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0502238A FR2882673B1 (fr) | 2005-03-07 | 2005-03-07 | Outil pneumatique a effet de poncage |
| PCT/FR2006/000499 WO2006095079A2 (fr) | 2005-03-07 | 2006-03-06 | Micro-ponceuse a effet de ponçage par disque air-abrasif |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1858669A2 true EP1858669A2 (fr) | 2007-11-28 |
| EP1858669B1 EP1858669B1 (fr) | 2008-12-17 |
Family
ID=34954883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06726031A Expired - Lifetime EP1858669B1 (fr) | 2005-03-07 | 2006-03-06 | Micro-ponceuse a effet de ponçage par disque air-abrasif |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20080171495A1 (fr) |
| EP (1) | EP1858669B1 (fr) |
| AT (1) | ATE417704T1 (fr) |
| DE (1) | DE602006004316D1 (fr) |
| FR (1) | FR2882673B1 (fr) |
| WO (1) | WO2006095079A2 (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK177274B1 (da) * | 2011-05-27 | 2012-09-10 | Flex Trim As | Slibehoved |
| DK177694B1 (da) * | 2012-12-04 | 2014-03-10 | Poul Erik Jespersen Kadicma | Værktøj med roterende bearbejdningsenhed |
| AU2013204704B2 (en) * | 2013-04-12 | 2014-11-20 | Helen Greenberg | An apparatus and method for delivering media into the skin |
| GB201503683D0 (en) | 2015-03-05 | 2015-04-22 | Rolls Royce Plc | A tool for machining an object |
| CN109759959B (zh) * | 2019-03-19 | 2020-04-17 | 温州益蓉机械有限公司 | 一种采用双向气动原理的断路器壳体加工用内腔喷砂装置 |
| CN114011772B (zh) * | 2022-01-04 | 2022-04-15 | 中南大学 | 一种用于粒子铜整形的设备 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2755598A (en) * | 1954-04-06 | 1956-07-24 | William N Van Denburgh | Rotary blast nozzle |
| US4057938A (en) * | 1976-06-17 | 1977-11-15 | Rohlfs John H | Portable sand blasting device |
| US4941298A (en) * | 1988-09-28 | 1990-07-17 | Mark Fernwood | Rear reservoir micro sandblaster |
| DE3834896A1 (de) * | 1988-10-13 | 1990-04-19 | Kiess Karl Heinz | Strahlduese fuer sandstrahlgeraete zur staubfreien bestrahlung planebener flaechen |
| FR2643626B1 (fr) * | 1989-02-24 | 1991-09-20 | Diat Christian | Machine automatique telecommandee du sol, destinees au nettoyage de facades |
| FR2643673B1 (fr) * | 1989-02-24 | 1991-06-14 | Diat Christian | Dispositif de nettoyage de facades |
| FR2684900B1 (fr) * | 1991-12-11 | 1995-03-17 | Christian Diat | Buse rotative multi-jets pour la projection de particules abrasives tres fines. |
| FR2685027B1 (fr) * | 1991-12-11 | 1994-04-01 | Christian Diat | Procede mecanique de nettoyage de la pollution des pierres de facade. |
| DE9303546U1 (de) * | 1993-03-11 | 1993-05-27 | Kieß, Karl-Heinz, 4330 Mülheim | Strahldüse für ein Sandstrahlgerät zur Bestrahlung planebener Flächen |
| FR2720662B1 (fr) * | 1994-02-01 | 1996-08-23 | Christian Diat | Dispositif de distribution d'un mélange d'air comprimé et de poudre. |
-
2005
- 2005-03-07 FR FR0502238A patent/FR2882673B1/fr not_active Expired - Fee Related
-
2006
- 2006-03-06 US US11/885,864 patent/US20080171495A1/en not_active Abandoned
- 2006-03-06 DE DE602006004316T patent/DE602006004316D1/de not_active Expired - Fee Related
- 2006-03-06 EP EP06726031A patent/EP1858669B1/fr not_active Expired - Lifetime
- 2006-03-06 WO PCT/FR2006/000499 patent/WO2006095079A2/fr not_active Ceased
- 2006-03-06 AT AT06726031T patent/ATE417704T1/de not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006095079A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2882673B1 (fr) | 2008-10-31 |
| WO2006095079B1 (fr) | 2007-01-25 |
| EP1858669B1 (fr) | 2008-12-17 |
| WO2006095079A3 (fr) | 2006-12-07 |
| WO2006095079A2 (fr) | 2006-09-14 |
| US20080171495A1 (en) | 2008-07-17 |
| ATE417704T1 (de) | 2009-01-15 |
| FR2882673A1 (fr) | 2006-09-08 |
| DE602006004316D1 (de) | 2009-01-29 |
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