• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A powder feeder (100) comprises a plurality of on a frame (10) arranged drive rollers (11) having a cylindrical rotating vessel (20), wherein its cylinder axis is also a rotation axis, a connection opening in the vessel for charging the powder, a in the chuck insert (30) inserted to hold the vessel in an air-tight manner and rotatably supporting, a powder discharge passage between vessel and chuck, an exhaust part on an inner surface of the vessel and an inner end of the powder discharge passage opposite to each other, the Ausschöpfteil continuously powder due to Rotation of the vessel receives, and a pressurizing passage, which is open to the inside of the vessel for a pressurized gas to pressurize the inside of the vessel, wherein the inner end of the powder discharge passageway connects inside and outside of the rotating vessel and to a Place open is where the powder taken up by the Ausschöpfteil falls down.
    公开号:CH711208B1
    申请号:CH01432/16
    申请日:2015-08-17
    公开日:2017-09-29
    发明作者:Shimazu Tadahiro
    申请人:Shimazu Kougyo Yuugen Kaisya；
    IPC主号:
    专利说明:

    description
    Technical Field of the Invention The present invention relates to a powder feeder for supplying various types of powders used in various technical fields.
    Background Art There are a number of definitions for the term "powder", from a crude distinction between particles having a small grain size as a powder and those having a larger dimension than granules, to designations such as particulate matter and microparticles. The fields of technology that deal with the physical properties, measurement methods, and methods of operation of such powders, that is, aggregates of a variety of particles, are also referred to as particle technologies or microparticle technologies, depending on the type of powder being used.
    Powders are essentially solids which consist of fine particles and which are used in a variety of technical fields. These include, for example, the food industry (wheat flour, etc.), the chemical industry (cosmetics, medicines, etc.), powders applied to surfaces (powder coatings), and surface processing methods using powders (polishing, chemical reactions, etc.). Such powder aggregates have unique properties different from those of liquids, gases, and other solids, and it is well known that these can very easily cause problems in manufacturing processes in the aforementioned fields, such as sticking, scattering, and clogging.
    In the field of thermal spraying in which, for example, a metal powder is heated to a molten state by a high-temperature gas and then sprayed onto a target surface to form a coating, powder feeds such as those described in Patent Document 1 or Patent Document 2 will be described. proposed.
    Documents of the prior art
    Patent Documents [Patent Document 1] Japanese Publication No. 1993-59 522 with its summary and accompanying figure [Patent Document 2] Japanese Publication No. 1994-132 096 with its summary and accompanying figure
    SUMMARY OF THE INVENTION Problems to be Solved by the Invention The object of the "powder feed" of Patent Document 1 is to supply an induction plasma spray device with a certain amount of powder without having a change in the flow rate caused by the gas pressure », And as shown in Fig. 9. This is achieved and is characterized in that «a powder storage vessel 1 is provided in the upper direction of a rotary shaft 4, wherein a rotor 3 is adapted in the lower direction in the above-mentioned storage vessel 1, wherein a doctor blade 9 directly above the rotor third is provided, and the powder receiving storage vessels 10 and 11 are sealed in the lower direction by an outer panel 12, and a gas pressure of the powder in the storage vessel 1, which is guided by a carrier gas in the outer space 12, and a gas pressure, the are applied to the powder in which the powder receiving memory is applied, whereby a certain proportion of the powder can be supplied to a plasma spraying device ».
    According to the "powder feeder" proposed in Patent Document 1, the powder storage vessel, the rotor, the squeegee, and the storage vessels accommodating the powder are sealed by an outer casing, the powder being agitated on the rotor at a predetermined rotational speed Rotation axis is doctored off by the doctor blade and passed into the vessel-shaped storage vessel receiving the powder, at the same time applying a gas pressure to the powder in the open-top powder storage vessel due to the carrier gas injected into the exterior housing from the outside; which is the same as the gas pressure applied to the powder accumulating in the reservoir receiving the powder. This makes it possible to continuously discharge a certain amount of powder, which has accumulated in the storage vessel accommodating the powder, together with the carrier gas from the lower end of the storage vessel into a thermal spray device.
    Here, however, there is a doubt as to whether the "doctoring off of powder from the rotor, which rotates at a predetermined rotational speed, using the squeegee, is designed to perform the powder in the storage vessel accommodating the powder" in a sufficiently controlled manner , to avoid problems.
    The reason for this doubt is, as mentioned above, that the "powder" has unique properties that are different from those of liquids, gases and other solids and easily problems such as sticking, scattering and clogging can cause. The severity of these problems depends on the grain size of the powder, and if the grain size is less than a few microns, it will no longer be possible to "scrape off the powder from the rotor using a squeegee" and some of the powder will be on the rotor remain, which will accumulate until blocked.
    Meanwhile, the aim of the "powder feeder" according to Patent Document 2 is that "a stable flame spray film of uniform thickness is fed by supplying small grain size powder having a viscosity to an induction plasma flame spraying apparatus without sticking together" as shown in the Fig. 10 there. This is achieved and is characterized in that "a turntable 1 with a circular powder storage groove 5 is rotatably mounted on a fixed table 7, and with a slider 10 which slides in a horizontal manner on this turntable 1 and from the same bearing 9 a powder storage vessel 8 is supported to the powder 8 a, which is ejected onto the turntable 1 from within the storage vessel 8 through this slider 10, to a powder storage 5 of the turntable 1 by horizontal sliding of the slider 10. The powder 8a accumulating in this powder storage groove 5 is supplied with a carrier gas from a carrier gas supply pipe 14 to a carrier gas introduction pipe of an induction plasma flame spraying apparatus by aligning an insertion hole 15 provided on the fixed table 7 to a powder storage groove 5.
    In the powder feeder according to Patent Document 2, "the powder 8a" supplied "with the carrier gas to a carrier gas introduction pipe" avoids the problem of sticking, but the contents in which the powder is transported without the use of the carrier gas, for example "The powder 8a, which is discharged onto the turntable 1 from within the storage vessel 8" still has the adhesion problem. Therefore, there are also other portions of the powder feeder of Patent Document 2 in which the problems of sticking, splitting, and blocking and clogging could easily occur, such as between the turntable 1 and the slider 10 moving horizontally thereon, and between the slider 10 and the powder storage vessel 8.
    As mentioned above, many definitions of the term powder exist based on material, grain size and intended use. Here, the term powder is further characterized and categorized based on an average grain size and in the following manner:
    Gross = 150pm to 22pm
    Mean = 44pm to 10pm
    Fine = 25 pm to 5 pm
    Very fine = 10pmbis2pm
    Superfine = 5 pm to 1 pm While it is of course clear that the value of a specific gravity of a powder differs depending on the material, the angle of deflection under the influence of static electricity also differs between the different fields of use. It is therefore a very essential condition that the powder can be supplied in a stable manner independently of these changes, for example, if one wants to form a multiple coating or films.
    In addition, when powders are stored in a container at ambient pressure, powders tend to clump together, a phenomenon which is more likely to occur, the higher the specific gravity and the smaller the grain size of the powder. Since the powder can not be stably supplied unless the lump has been broken up beforehand, this phenomenon must be removed. The most effective way to do this is to mix the powder with a gas.
    [0015] The inventors of the present invention have referred to how stable delivery of various types of powders can be achieved and found that the following accompanying steps are necessary, based on which they have developed the present invention: a) Dry holding of the powder, b) moving the powder at the time of feeding in such a way that no consolidation of the powder occurs, c) sealing the powder in a pressurized space, d) providing a uniform quantity of the withdrawn powder, e) unloading one certain amount of powder from the pressurized space using a carrier gas; f) performing a mixing function to prevent clumping.
    In other words, it is an object of the present invention to provide a powder feeder capable of stably supplying various types of powders.
    Means for Solving the Problems In order to solve the above-mentioned problems, the invention employs the features according to claim 1 provided with the reference numerals for the preferred embodiments as described below.
    The powder feeder 100 according to an embodiment of the present invention rotates a rotating vessel 20 through a plurality of drive rollers 11 disposed on a frame 10, and uses a flow of pressurized gas to remove powder which is in the flow rotating vessel 20 is stored with a predetermined amount to a predetermined location, for example, a coating gun for the powder coating or a thermal spray gun for performing a thermal spraying, and it does not result in an appropriate amount of powder flow from the vessel, such as in Patent Documents 1 and 2. In other words, the vessel 20 of the powder feeder 100 is placed on the drive rollers 11 and is therefore rotatably driven. In order to make this rotary drive uniform, the vessel is of cylindrical shape with an axis of rotation as the axial center, as shown in Figs. 1 and 2.
    To install an exhausting member 50 within the rotating vessel 20 and to get the vessel into a cylindrical shape with an axial center, as shown in Fig. 3a, the vessel is divided into a connecting part 20a and a main body 20b , which are each cylindrical and have identical circular openings on their mutually adjacent sides, wherein the connection part 20a has a circular connection opening 21 on the opposite side of the connection side and aligned with the axial center of the connection part 20a, and the main body has a "bottom" which is formed on the opposite side of the connection side. As shown in Fig. 3b, the connecting part 20a and the main body 20b are connected and coupled at their adjacent sides via couplings 23, resulting in a rotating vessel 20 having an exhaust part 50 integrated therein and which is hermetic Way except the connection opening 21 is sealed. The rotating vessel 20 is charged via the communication port 21 with powder of one of the plurality of different materials and is then placed on a frame on which the drive rollers 11 are arranged. A chuck 30 is used to secure the rotating vessel 20 to the frame. As shown in Figs. 1 and 2, the chuck has a part which is inserted into the connecting hole 21 of the rotary vessel 20 and a part which is surely supported by a support base 31, and these two parts are rotatable relative to each other by a bearing 32 which is arranged between them.
    As a result, the part of the chuck 30 inserted into the communication hole 21 will rotate with the rotating vessel 20, while the part which is surely held by the support frame 31 (support block 34 in the embodiments) is held on the support base 31 and supports the rotating vessel 20 so as to rotate in a fixed position. By installing a gasket 33, for example, between the part of the chuck 30 inserted in the connection hole 21 and the support frame 31 and between the portion of the chuck 30 inserted in the connection hole 21 and the connection hole 21 itself, this becomes Vessel made airtight.
    As a result of the above configuration of an embodiment, the rotating vessel 20 in the powder feeder 100 is supported by the driving rollers 11 and a chuck 30 partially inserted into the communicating hole 21, and thus is airtight and rotationally supported by the rotation of the rotating one Vessel 20, the already loaded in it powder is moved in a constant manner and kept in a dry state. In other words, the powder feeder 100 is capable of actively performing the following items: 1) keeping the powder dry, 2) moving the powder at the time of feeding so that agglomeration does not take place.
    In addition, as shown in FIGS. 2 to 4, in the present powder feeder 100, a wicking member 50 is disposed within the rotating vessel 20 so that when the rotating vessel rotates in a feeding direction, as shown by the drawn Arrow is shown in Fig. 4, the powder is collected continuously, as shown in Figs. 4 and 5. An inner end 41 of a powder discharge passage 40 connecting the inside and the outside of the rotating vessel 20 opens to the place where the powder falls out of the discharge part 50 through the discharge part 50. The other end of the powder discharge passage 40 leads to the outside of the rotating vessel 20.
    As shown in Fig. 5, an inner end 61 of a pressurized gas pressurization passage 60 which pressurizes the inside of the rotating vessel 20 also opens to the inside of the rotating vessel 20 , Meanwhile, the powder discharge passage 40 as described above communicates with the outside of the rotary vessel 20 through the discharge port 13 as shown in FIG. Since the inner end 61 of the pressurizing passage 60 is a gas discharge port for pressurizing the inside of the rotating vessel 20, it can be opened to any location within the rotating vessel 20.
    Due to this configuration, as long as pressurized gas is continuously discharged to the rotating vessel 20 from the pressurizing passage 60, a mixture of powder and pressurized gas is supplied to the inner end 41 of the powder discharge passage 40 as well 5, when a device such as a thermal spray gun 80 is connected at the other end of the powder discharge passage 40 and goes into an operative state. Accordingly, the powder is supplied to the outside of the rotating vessel 20.
    Thus, the powder received by the wicking member 50 is raised by the rotation of the rotating vessel 20 into the region of the inner end 41 of the powder discharge passage 40 where the powder enters the powder discharge passage 40 through the inner end 41 by the weight of the powder itself and the gas flow is supplied to the powder discharge passage 40 without scattering, settling, adhering or clumping, and finally discharged from the rotating vessel 20 through the powder discharge passage 40.
    In other words, during the operation of the present powder feeder 100, a certain set amount of powder in the rotary vessel 20 is taken in at a time by the continuously rotating discharge part 50 and together with a pressurized gas which is in the the rotating vessel is added via pressurizing passage 60, the powder is continuously discharged and conveyed in a fixed amount from the opening of the powder discharge passage 40 to the outside of the rotating vessel 20.
    In the powder feeder 100, the powder is not hermetically sealed within the rotating vessel 20, but is taken up in a continuous manner by the skimming part 50 disposed on the inside of the rotating vessel 20 and toward the outside of the powder discharge passage 40 due to the weight of the powder itself and the flow of pressurized gas to the powder discharge passage 40. Thus, the powder feeder 100 is capable of discharging all of the following types of powder.
    Coarse = 150pmbis22pm
    Mean = 44pm to 10pm
    Fine = 25pm to 5pm
    Very fine = 10pmbis2pm
    Superfine = 5 pm to 1 pm Since the powder will flow down in the rotating vessel 20 of the powder feeder 100, there is a possibility that static electricity is generated in the powder. In order to draw the most out of the rotating vessel 20, the skimmer 50, the powder discharge passage 40 and the pressurizing passage 60 are made of metal such as stainless steel, which avoids static electricity, and the rotating vessel 20 can be grounded to the outside prevents static electricity.
    The powder feeder according to claim 1 is therefore capable of (c) sealing the powder in a pressurized space, (d) setting a uniform amount of powder removed, (e) discharging a predetermined amount of powder from a pressurized one Space using a carrier gas.
    The powder feeder 100 supplies a predetermined amount of powder and discharges a stable amount of various powder types.
    In addition, by manufacturing the rotating vessel 20, the powder feeder 100 according to claim 2 can rotate in a mixing direction as indicated by the dashed arrow in Fig. 4 (in the opposite direction to the above-mentioned feeding direction). in which the powder and the gas in the rotating vessel 20 can be mixed. In order to do this, it is sufficient simply to reverse the direction of rotation of the drive roller 11 and stop the supply of pressurized gas from the pressurizing passage 60. At this time, the powder will not get to the outside through the powder discharge passage 40.
    Since rotation of the driving rollers 11 in the opposite direction causes the rotating vessel 20 to rotate in the opposite direction, it is clear that the same applies to the expanding portion 50 disposed on the inside of the rotating vessel 20. The inner surface of the exhausting member 50 is provided with a plurality of small exhausting grooves 51 as described in the embodiment described below, which effectively absorb the powder in the rotary vessel 20 during the regular rotational movement. When these receiving grooves 51 rotate in opposite directions, the bottom surfaces of the priming grooves 51 will take over the powder stirring and partially lift it up.
    The opposite direction of rotation of the cylindrical rotating vessel 20 causes the powder in the rotating vessel 20 is lifted in a recurrent manner and falls down on the right side of Fig. 4, wherein the powder with the gas in the rotating vessel 20 mixed. As a result, even if the powder had caked, the gas in the rotating vessel 20 will mix each grain of the powder, loosen it up, and ensure that the subsequent delivery is smooth. The powder feeder 100 according to claim 1 is therefore capable of: (f) performing blending to avoid lumping
    The powder feeder 100 can supply a predetermined amount of powder even when the powder is clumped in the rotating vessel 20, and can stably discharge various types of powder.
    In order to solve the above-mentioned problems, an embodiment of the invention according to claim 3 has further features that are to be added to those of claim 2.
    In the powder feeder 100 according to claim 3, as shown in Figs. 2 and 5, the pressurizing passage 60 and the powder discharge passage 40 are arranged in parallel in a single passage block 70 through which the place where the powder discharge passage 40 and 40 passes the pressurizing passage 60 are formed to exist within a predetermined limited range, that is, the passage block 70 provides more free space within the rotating vessel 20 and facilitates connection of the powder discharge passage 40 and the pressurizing passage 60 to the chuck 30.
    In addition, as shown in Fig. 5, for example, a curved surface 71 is disposed on the end of the passage block 70, which is in close proximity to the Ausschöpfteil 50 and the curved surface 71 and the inner surface of the Ausschöpfteils 50 are adapted to each other , With the distance between the curved surface 71 and the inner surface of the exhausting member 50, the curved surface 71 making no contact with the exhausting member 50 on the inside of the rotating vessel 20 as it rotates becomes smooth rotation of the rotating vessel 20 ensured.
    Accordingly, the powder feeder 100 according to claim 3 is provided with the same functions as those of claim 2 and, in addition, allow a larger space inside the rotating vessel for easy rotation of the rotating vessel 20.
    To address the above-mentioned problems, an embodiment of the invention additionally employs the features according to claim 4, which are complementary to those of claim 3 and claim 2.
    In the powder feeder according to claim 4, the respective inner ends 41 and 61 of the powder discharge passage 40 and the pressurizing passage 60 open toward the curved surface 71, so that pressurized gas from the inner end 61 of the pressurizing passage 60 opens to the immediately adjacent inner end End 41 of the powder discharge passage 40 is supplied and all the powder falling from the Ausschöpfteil 50 is drawn into the powder discharge passage 40 by the flow of the pressurized gas and is supplied to the powder discharge passage 40 to the outside in an efficient manner.
    Accordingly, the powder feeder 100 according to claim 4 exhibits the same functions as that of claim 3 and, in addition, is capable of efficiently discharging the powder.
    In order to solve the above-mentioned problems, another embodiment of the invention in an alternative embodiment, the features according to claim 5 a.
    The powder feeder 100 according to claim 5 is shown in Figs. 7 and 8. Since the powder feeder 100 is identical to that of claim 1, with the exception of the points discussed above, in the description are identical
    Features have been omitted by the same reference numerals as in Fig. 7 and Fig. 8 and as in the powder feeder according to claim 1 or 2 are used.
    The structural differences between the powder feeder 100 according to claim 5 and claim 2 are as follows: (1) Rotation of the rotating vessel 20 is completely carried out by the drive motor 12 disposed on the frame 10. (2) A pair of chucks 20 are disposed at the axial center end of the rotating vessel 20 and rotatably support the rotating vessel 20. (3) A main portion of the passage block 70 is disposed between the chucks 30, with a portion the Ausschöpfteil 50 opposite. (4) The powder can be introduced into the rotating vessel 20 from any location.
    The difference (1) described above is achieved as shown in Figs. 7 and 8 by arranging the drive motor 12 on the frame 10 and installing a chain or a belt 14 which is driven by the drive motor 12, and a The rotating vessel is thus driven by the drive motor 12 due to the rotating driving force of the drive motor 12, which is transmitted to the rotating vessel 20 via the chain or belt 14. The chain or belt 14 may be installed not only at the periphery of the rotating vessel 20 as shown in Fig. 7 but also at any other part or other element.
    The above-mentioned difference (2) is achieved by forming a chuck 30, as shown in Fig. 2, which shows a powder feeder 100 according to claim 1, on the opposite side of the rotating vessel 20. In other words, the powder feeder 100 according to claim 5 is formed with a communication hole 21 of similar shape in the communication hole 21 as described in claim 1 on the opposite side of the axial center of the rotary vessel 20, and a chuck 30 is on each Connection opening 21 attached to be able to support the rotating vessel 20 in a rotatable manner.
    The chucks 30, which are supported on both sides of the axial center of the rotating vessel 20 on the frame 10 by a pair of right and left support frames 31, as shown in Figs. 7 and 8 and similar to the above described powder feed 100 according to claim 2, support blocks 34, which form the chuck 30, engage with vertical engaging elements 31 on the support frame 31 a.
    A significant difference of the powder feed 100 according to claim 5 from that in claim 1 lies in the difference (3). In the configuration of (3), the passage block 70 is in a T-shape with the main portion disposed between the chucks 30 and a portion opposite to the ejection portion 50 other than the L-shaped passage block 70 of claim 2. as shown in FIG. 2. In other words, the main portion of the passage block 70 is a linear portion disposed between the chucks 30, and this linear portion constitutes the rotation center of the rotating vessel 20.
    The main portion of the passage block 70 disposed between the chucks 30 is non-rotatably supported on the frame 10 by the support frame 31, and the rotating vessel 20 and the connection opening 21 are defined by the bearings 32 as described above connected by the powder feeder 100 according to claim 2. By analogy, the portion in which the passage block 70 is supported will remain unchanged even when the rotating vessel 20 rotates.
    The other end of the passage block 70 is, as shown in Fig. 8, provided in the circumferential direction of the rotating vessel 20 and opposite to the Ausschöpfteil 50, which continuously powder within the rotating vessel 20 due to the rotation of itself rotating vessel 20 receives. This configuration is similar to that of the powder feeder 100 according to claim 2.
    The powder feed 100 according to claim 5 must be replenished naturally, when the powder in the rotating vessel 20 goes out. The powder feeder 100 with the configuration (4) of this embodiment allows the powder to be supplied to the rotary vessel 20 from any location. In the powder feeder 100 according to claim 2, the powder in the vessel by the removal of the rotating vessel 20 has been made possible on the chuck 30 and the loading of the powder through the connection opening 21. In the powder feeder 100 according to claim 5, however, the powder without opening the Connection opening 21 are charged, for example by a powder feed window 20 c, which is formed in the side of the rotating vessel 20. This powder supply window 20c may be formed anywhere as long as it does not interfere with the chain or the belt 14 of the drive motor 12. In this sense, the powder can be loaded from any location.
    The above-mentioned configuration of the powder feeder 100 according to claim 5 makes it possible to avoid the decrease of the rotating vessel on the chuck 30 during operation to charge the powder into the communicating opening 21 as in the powder feeder 100 according to claim 2 , and allows efficient coating or thermal spraying of a large area with the same type of powder. On the other hand, as described above, the powder feeder 100 according to claim 2 may be very well suited for performing a multiple coating or films using various types of powders or for performing various types of coatings or thermal spraying.
    In addition, the powder feeder 100 according to claim 5 has a powder discharge passage 40 which is formed inside the above-mentioned passage block 70 and which connects the inner side and the outer side of the rotating vessel 20 with each other, and an inner end 41 facing the Ausschöpfteil 50 , and a pressurizing passage 60 which is also disposed inside the passage block 70 for a pressurized gas, which pressurizes the inside of the rotating vessel 20. The powder feeder 100 according to claim 5 is capable of adding powder as the rotating vessel 20 rotates in substantially the same manner as the powder feeder of claim 2.
    As a result of the configuration described above, in this powder feeder 100, the passage block 70 inside the rotating vessel 20 is supported by the chucks 30, the rotating vessel 20 being supported in a rotatable and airtight manner and due to the rotation of the rotating vessel 20 the powder is stirred within the rotating vessel 20 in a constant manner and kept in a dry state. In other words, the powder feeder 100 according to claim 5 is capable of (a) keeping the powder dry, (b) stirring the powder at the time of delivery so that solidification can not occur, (c) sealing the powder under pressure standing space, (d) for setting a predetermined amount of withdrawn powders, (e) for discharging a certain amount of powder from the pressurized space using a carrier gas.
    Of course, the powder feeder 100 according to claim 5 is also capable of mixing the powder and the gas in the rotating vessel 20 by rotating the rotating vessel 20 in the mixing direction (the direction opposite to the feeding direction). In order to do this, it is simply sufficient to reverse the direction of rotation of the drive motor 12 and to adjust the supply of pressurized gas from the pressurizing passage 60. At this time, no powder will pass to the outside through the powder discharge passage 40.
    The opposite rotation of the cylindrical rotating vessel 20 causes the powder in the rotating vessel 20 to be repeatedly raised and dropped, thereby mixing the powder with the gas in the rotating vessel 20. Thereby, even if the powder has caked, the gas in the rotating vessel will mix each grain of the powder and mix it up to ensure that subsequent delivery can be done in an undisturbed manner.
    The powder feeder 100 according to claim 5 is thus capable of (f) carrying out the mixing to avoid the lumping.
    In particular, the configuration of the powder feeder 100 according to claim 5 makes it possible to avoid the operation of removing the rotating vessel from the chucks 30 to charge powder into the communicating opening 21 as in the powder feeder 100 according to claim 2 to efficiently coat or thermally spray a large number of equal types of powders.
    As a result of the above-mentioned configuration, the powder feeder 100 according to the present invention is capable of all the following properties: A. Dry keeping of the powder. B. stirring the powder at the time of delivery, so that solidification can not occur. C. Closing the powder in a pressurized room. D. Delivery of a uniform amount of withdrawn powder. E.
    Delivering a predetermined amount of powder from the pressurized space using a carrier gas. F. Perform mixing to avoid clumping.
    Short description of the drawings [0058]
    Fig. 1 is a front view of the powder feeder 100 according to the invention of claim 2;
    Fig. 2 is a cross-sectional view of the powder feeder 100;
    Fig. 3 shows the rotating vessel 20 of the powder feeder 100, wherein Fig. 3a shows a cross-sectional plan showing the rotating vessel 20 consisting of a connecting part 20a and the main body 20b, and Fig. 3b is a cross-sectional diagram illustrating the Connecting part 20a and the main body 20b which are coupled with each other;
    Fig. 4 is a partially cutaway front view showing an enlarged view of the inside of the rotary vessel 20;
    Fig. 5 is a partially cutaway side view showing the circumference of the curved surface 71 of Fig. 4;
    Fig. 6 is a schematic view of a thermal spray apparatus employing the powder feeder 100 according to the present invention;
    Fig. 7 is a front view of the powder feeder 100 according to the invention of claim 5;
    Fig. 8 is a cross-sectional view of the powder feeder 100;
    Fig. 9 is a cross-sectional view of the powder feeder as proposed in Patent Document 1 of the prior art; and
    Fig. 10 is a cross-sectional view of the powder feeder as proposed in Patent Document 2 of the prior art.
    Preferred Embodiment of the Present Invention The invention having the configurations as recited in the claims will now be described with reference to a powder feeder 100 illustrated in the embodiments of the drawings, Figs. 1-6 show a first embodiment of the powder feeder 100, and Figs. 7 and 8 show a second embodiment of the powder feeder 100. These embodiments of the powder feeder 100 may be connected to a controller such as that shown on the right side of FIG. 1 to provide thermal spray material in the form of a powder, for example, for a thermal spray gun 80 as shown in FIG , First Embodiment As shown in Figs. 1 and 2, the powder feeder 100 according to the first embodiment has a plurality of drive rollers 11, each drive roller 11 being disposed on a frame 10 such that the axes of rotation of each roller are horizontal wherein the driven rollers 11 support a substantially cylindrical rotatable vessel 20. As shown in Fig. 3, the rotating vessel 20 is composed of a connecting part 20a and a main part 20b, the opposing main parts 20b together forming the central axis of the vessel, which becomes horizontal when it is seated on the driving rollers 11. In order to join the connection part 20a and the main body 20b, the connections 23 are arranged on opposite end surfaces of the connection part 20a and the main body 20b with an exhaust part 50 enclosed.
    As shown in Figs. 3a and 3b, the connecting portion 20a forming the rotating vessel 20 has a joint 21 formed on the opposite side of its opposite end surface. The center of this communication port 21 is positioned on the central axis of the rotating vessel 20, and when a chuck 30, which will be described later, is inserted into the communication port 21, the center of the chuck 30 is placed on the central axis of the rotating vessel 20 , A cap thread 22 onto which a connection cap 35 of the chuck 30 is screwed as shown in Fig. 2 is also formed on the outside of the connection hole 21 of the connection part 20a.
    Moreover, the opposite side of the above-mentioned opposite surface of the main body 20b is closed, thus forming the bottom of the rotating vessel 20. In other words, the rotating vessel 20 may stand on a table or something else standing on the table closed end of the main body 20 b are arranged with the connection opening 21 of the connecting part 20 a looking upwards and allow the powder to be charged into the rotating vessel 20 through the connection opening 21.
    As described above, clutches 23 are formed on the opposite end surfaces of the connection part 20a and the main body 20b. In the powder feeder 100 according to the present embodiment, an exhaust part 50 is connected to the clutches 23 on one side as shown in FIG. 3a. In FIG. 4, it is shown that the wicking member 50 is disposed around the entire inner circumference of the rotating vessel 20, and FIG. 5 shows that it has a continuously formed plurality of wicking grooves 51 for exploiting the inside of the rotating body Vessel has 20 existing powder. Each priming groove 51 draws powder from the powder rotating in the rotating vessel 20, and when the priming groove 51 has reached an inner end 41 of a powder discharge passage 40, as will be described later, the collected powder falls toward the inner end 41.
    Thus, by coupling the connecting part 20a and the main body 20b together at their opposite end surfaces using the clutches 23 for the resulting rotary vessel 20, a powder storage part having an exhaust part 50 on the inside thereof and hermetically formed is completed to the connection opening 21 of the connecting part 20a.
    A passage block 70, which will be described later, is inserted into the communication port 21 of the rotary vessel 20 and stores a predetermined amount of powder, and a chuck 30 is then connected to the communication port 21 and the rotating vessel is placed on the Drive rollers 11 are arranged. The start-up of the rotating vessel 20 on the frame 10 is terminated by writing down a connecting cap 35, which forms the chuck 30 on the outer circumference of the connecting opening 21 of the rotating vessel 20.
    The chuck 30 according to the present embodiment, as shown in Figs. 1 and 2, has a portion which is inserted into the connection opening 21 of the rotating vessel 20, and a part, which in a secure manner by the support frame 31st is supported, and these two parts are relatively rotatable by a bearing 32 between the two parts. The portion which is securely supported by the support frame 31 has a support block 34, as shown in FIG. 2, in which a support groove 34 a is formed, which engages in a vertical engagement part 31 a, which is formed on the support frame 31 is. The chuck 30 is thus non-rotatably connected to the frame 10 of the powder feeder 100 by inserting the engaging part 31 a of the support frame 31 in the support groove 34 a of the support block 34.
    This results in the portion of the chuck 30 inserted into the connection hole 31 for rotation with the rotating vessel 20, while the support block 34 and the portion of the chuck 30 are surely supported by the support frame 31 , are securely connected to the support frame 31 and support the rotating vessel 20 so as to rotate in a set position. By installing a gasket 33, for example, between the portion of the chuck inserted into the connection hole 21 and the portion fixed to the support frame 31 and between the portion of the chuck 30 inserted in the connection hole 21 and the Connection opening 21 itself, the vessel can be sealed airtight.
    As previously mentioned, the passage block 70 is inserted in the rotating vessel 20. As shown in FIGS. 2, 4 and 5, a powder discharge passage 40 and a pressurizing passage 60 are formed in parallel with each other, which means that they can not intersect each other within the passage block 70. As shown in Fig. 5, the inner end 41 of the powder discharge passage 40 is aligned with the discharge part 50, and the other end passes through the chuck 30 and connects, for example, a thermal spray gun 80 as shown in Fig. 6, and this provides powder As shown in Fig. 5, the inner end 61 of the pressurizing passage 60 faces the exhausting member 50 and sprays an inert gas such as argon, which is pressurized and from a control device, as shown in Figure 1, is supplied to the Ausschöpfteil 50 out.
    Further, in the powder feeder 100 according to the first embodiment, a curved surface 71 is formed on the end of the passage block 70, which is in close proximity to the Ausschöpfteil 50, and the curved surface 71 and the inner surface of the Ausschöpfteils 50 are configured, to face each other with a margin of about 0.5 mm between them. This allows the powder discharge passage 40 and the pressurizing passage 60 to be formed inside the passage block 70, which releases even more space in the rotating vessel 20 for storing powder, and the connection between the powder discharge passage 40 and the pressurizing passage 60 with the chuck 30 simplified. Since the curved surface 71 of the passage block 70 is designed not to come into contact with the discharge part 50 on the inside of the rotating vessel 20 as it rotates, smooth rotation of the rotating vessel 20 is ensured.
    In addition, in the powder feeder 100 according to the first embodiment, the respective inner ends 41 and 61 of the powder discharge passage 40 and the pressurizing passage 60 become curved
    Open surface 71 so that pressurized gas from the inner end 61 of the pressurizing passage 60 to the immediately adjacent inner end 41 of the powder discharge passage 40 is supplied and all the powder falling from the Ausschöpfteil 50, in the powder discharge passage 40 by the flow of compressed gas is drawn in and effectively transported through the powder passageway passage 40 to the outside.
    In addition, as the rotating vessel 20 of the powder feeder 100 rotates in a mixing direction as shown by the broken arrow in Fig. 4 (in the opposite direction to the feeding direction as indicated by the solid arrow is), the powder and the gas in the rotating vessel 20 may be mixed. To do so, it is sufficient to easily reverse the direction of rotation of the driving rollers 11 and stop the supply of pressurized gas through the pressurizing passage 60. At this time, the powder will not escape to the outside through the powder discharge passage 40.
    Since an inverted rotation of the drive rollers 11 causes the rotating vessel to rotate in the opposite direction, it is clear and not actually necessary to emphasize that it is true for the wicking part 50 lying on the inside of the rotating one Vessel 20 is arranged. The inner side of the exhausting member 50 is, as explained in the embodiment described below, provided with a plurality of small Ausöpfnuten 51, the powder in the rotating vessel 20 deliver during the usual rotation. When these receiving grooves 51 move in the opposite direction, the bottom surfaces of the priming grooves 51 will mix the powder while pushing it upward.
    The opposite rotation of the cylindrical rotating vessel 20 causes the powder in the rotating vessel 20 to be repeatedly raised on the right side of Fig. 4 and falls, thus mixing the powder with the gas in the rotating vessel resulting in rotating vessel 20. Because of this, even if the powder had previously caked, the gas in the rotating vessel 20 will mix each grain of the powder, shake it up and ensure that subsequent delivery can be carried out without problems.
    As described above, the powder feeder 100 described above can be used in thermal gun spraying in a thermal spray gun as shown in Fig. 6, wherein the material of the powder may include ceramics, metal and oxides thereof. In addition, this powder feeder 100 is capable of supplying powders of average grain sizes in the range of 10 to 50 microns ("medium" or "fine" in the scale described above) and since it is possible to use powders of different grain sizes, which are separate, separate are stored, if necessary, by simply replacing the vessel, this powder feeder 100 is well suited for most cases where a fine-textured thermal spray film is to be formed on a rough-textured thermal spray film. Second Exemplary Embodiment A powder feed 100 according to a second exemplary embodiment is shown in FIGS. 7 and 8. Since the powder feeder 100 is identical to that of the first embodiment except for the points described below, descriptions of the identical features are omitted when they carry the same reference numerals in Figs. 7 and 8 as in the powder feeder 100 according to the first embodiment.
    The structural differences between the powder feeder 100 according to the second embodiment and that according to the first embodiment are as follows: (1) The rotation of the rotary vessel 20 is carried out solely by the drive motor 12 disposed on the frame 10 , (2) A pair of chucks 30 are installed at the ends of the axial center of the rotating vessel 20, which in particular assist the rotating vessel 20 in a rotating manner. (3) The main portion of the passage block 70 is disposed between the chucks 30, with a portion facing the exhaust portion 50. (4) The powder can be supplied in the rotating vessels from any location.
    The above difference (1), as shown in Figs. 7 and 8, achieved by placing the drive motor 12 on the frame 10 and by installing a chain or a belt 14, which by the drive motor 12 at a suitable location is driven at the periphery of the rotating vessel. The rotating vessel 20 is thus driven by the drive motor 12 due to the rotational drive forces of the drive motor 12 which are transferred to the rotating vessel 20 via the chain or belt 14. The chain or belt 14 may or may not be installed on the periphery of the rotating vessel 20, as shown in Fig. 7, but may be arranged on another part or element.
    The above-mentioned difference (2) is achieved by forming a chuck 30, as shown in Fig. 2, which shows the powder feeder 100 according to the first embodiment, on the opposite side of the rotating vessel 20. Mit In other words, in the powder feeder 100 according to the second embodiment, a communication hole 21 of a similar shape as the communication hole 21 described in the first embodiment is formed on the opposite side on the axial center of the rotary vessel 20, and a chuck 30 is attached to each connection opening 21 so as to be able to support in rotation support the rotating vessel 20.
    The chucks 30 disposed on both sides on the axial center of the rotating vessel 20 are both supported by the frame 10 by a pair of right and left support frames 31 as shown in Figs In the same manner as described above, in the powder feeder 100 according to the first embodiment, where support blocks 34 constituting the chucks 30 engage with vertical engaging pieces 31a formed on the support frame 31.
    An essential difference of the powder feeder 100 according to the second embodiment from that of the first embodiment is the difference (3). In this configuration of (3), the passage block 70 is in a T-shape, with the major portion disposed between the chucks 30 and a portion facing the discharge portion 50, which is different from the L-shaped passage block 70 of the first embodiment shown in Figs Fig. 2 is shown. In other words, the major portion of the passage block 70 is a linear portion disposed between the chucks 30, and this linear portion constitutes the rotation center of the rotating vessel 20.
    The major portion of the passage block 70 positioned between the chucks is non-rotatably supported by the frame 10 by the support frames 31, and the rotating vessel 20 and the connection openings 21 are divided by bearings 32 as before has been described for the powder feeder 100 according to the first embodiment. Accordingly, the position at which the passage block 70 is supported will remain unchanged even when the rotating vessel 20 rotates.
    The other part of the passage block 70, as shown in Fig. 8, is disposed in the circumferential direction of the rotating vessel 20 and is opposite to the Ausschöpfteil 50, which in a continuous manner powder within the rotating vessel 20 due to the rotation of itself rotating vessel 20 receives.
    Of course, the powder feeder 100 according to the second embodiment must be refilled when the powder in the rotating vessel 20 goes out. The powder feeder 100 with the configuration (4) allows it to be fed in the rotating vessels 20 from any location, for example, through a powder feed window 20c provided in the side of the rotating vessel 20. This powder supply window 20 c may be formed anywhere as long as it does not interfere with the chain or the belt 14 of the drive motor 12. In this sense, the powder can be supplied from any location.
    The above configuration of the powder feeder 100 makes it possible to avoid the operation of detaching the rotating vessel from the chuck 30 to charge powder into the communicating port 21, and allows efficient coating or thermal spraying using a large amount of the same type to make powder.
    In addition, the powder feeder 100 has a powder discharge passage 40 formed inside the above-mentioned passage block 70, which connects the inside and outside of the rotating vessel 20 to each other and which has an inner end 41 facing the scoop part 50 and a powder discharge passage 40 Pressurization passage 60 disposed within the passage block 70 has a pressurized gas which is pressurized within the rotating vessel 20. The powder feeder 100 may therefore allow a powder feed when the rotating vessel 20 rotates, substantially in the same manner as in the powder feeder 100 according to the first embodiment.
    INDUSTRIAL APPLICABILITY The thermal spray gun 80 as shown in Fig. 6 is provided with very fine powders having an average grain size of 10-50 micrometers ("medium" or "small" in the above-mentioned scale ). Nevertheless, the powder feeder 100 according to the present invention can be applied to powders having an average grain size of 10 to 50 microns, and which in a variety of technical fields such as the food industry (wheat flour, etc.), the chemical industry (cosmetics, pharmaceuticals etc.), the applications of powders on surfaces (powder coatings), and the surface processing using powders (polishing, chemical reactions and so on) can be used.
    List of Reference Numerals [0087] 10 frames
    权利要求:
    Claims (5)
    [1]
    11 drive roller 12 drive motor 13 discharge port 20 vessel 20a connection part 20b main body 20c powder supply window 21 connection opening 22 cap thread 23 coupling 30 chuck 31 support frame / support base 31a vertical engagement part 32 bearing 33 seal 34 support block 34a support groove 35 connection cap 40 powder discharge passage 41 inner end 50 discharge part 51 discharge groove 60 pressurization passage 61 inner end 70 passage block 71 curved surface 80 thermal spray gun 100 powder feed Patent claims
    A powder feeder (100) comprising: - a plurality of drive rollers or a drive motor as a drive (11; 12) disposed on a frame (10), - a cylindrical rotating vessel (20) driven by the drive (11 12) is driven in such a way that the cylinder axis of the rotating vessel (20) becomes its axis of rotation, - at least one connecting opening (21) formed in a section of the rotating vessel (20) for charging the powder into the rotating vessel ( 20), - a chuck (30) per connection opening (21), which chuck (30) is inserted into the connection opening (21) attached to the rotation axis of the rotating vessel (20) to rotatably the rotating vessel (20), - a powder discharge passage (40) connecting an inner side and an outer side of the rotating vessel (20) through the respective chuck (30), an exhaust part (50) extending along an Inn the discharge vessel (50) continuously collects powder within the rotating vessel (20) due to the rotation of the rotating vessel (20), a pressurizing passage (60) leading to the rotating vessel (20) Inside of the rotating vessel (20) is open for a pressurized gas to pressurize the inside of the rotating vessel (20), wherein an inner end (41) of the powder discharge passage (40), the inside and Outside of the rotating vessel (20) connects and is open to a place where the powder, which has been absorbed by the Ausschöpfteil (50), falls down.
    [2]
    Second powder feed (100) according to claim 1, characterized in that - the drive comprises a plurality of drive rollers (11) whose axes of rotation are arranged horizontally on the frame (10), - a single chuck (30) with a single connection opening (21), wherein the chuck (30) is supported by a support frame (31) for airtight and rotatably supporting the rotating vessel (20), and - that the discharge part (50) faces the inner end (30). 41) of the powder discharge passage (40).
    [3]
    The powder feeder (100) according to claim 2, wherein the powder discharge passage (40) and the pressurizing passage (60) are arranged in parallel within a single passage block (70), the passage block (70) forming a curved surface (71) at one end thereof which is disposed opposite to the bulking member (50), and wherein the curved surface (71) and an inner surface of the bulking member (50) are formed so as to face each other at a distance therebetween.
    [4]
    The powder feeder (100) according to claim 3, wherein the inner ends (41, 61) of both the powder discharge passage (40) and the pressurizing passage (60) are adapted to move within the curved surface (71) of the passage block (70). to open.
    [5]
    5. Powder supply (100) according to claim 1, characterized in that - the drive comprises a drive motor (12) which is arranged on the frame (10), - that two chucks (30) each having a connection opening (21) are provided wherein the pair of chucks (30) are secured to the axis of rotation of the rotating vessel (20) to rotatably support the rotating vessel (20), - that a passage block (70) is provided, of which a substantial A portion is disposed between the pair of chucks (30) and another portion faces the discharge portion (50), and the powder discharge passage (40) is disposed within the passage block (70) for connecting an inner side and an outer side of the rotating vessel (20), wherein an inner end of the powder discharge passage (40) faces the exhaustion part (50).
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    同族专利:
    公开号 | 公开日
    WO2016006717A8|2016-02-25|
    JP2016056005A|2016-04-21|
    JP5680787B1|2015-03-04|
    WO2016006717A1|2016-01-14|
    US9802770B2|2017-10-31|
    US20170029224A1|2017-02-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2825605A|1955-02-22|1958-03-04|Hans Sickinger|Means for conveying powdery material in fine distribution, particularly for use in flash die casting|
    US3350014A|1965-10-21|1967-10-31|William T Pfister|Flock-applying apparatus|
    US4860928A|1986-12-24|1989-08-29|Tadahiro Shimazu|Powder constant-volume feeder|
    JPH0546249B2|1986-12-24|1993-07-13|Shimazu Kogyo Jugengaisha|
    JPH0715142B2|1991-08-27|1995-02-22|株式会社三社電機製作所|Powder feeder|
    JPH06132096A|1992-10-15|1994-05-13|Sansha Electric Mfg Co Ltd|Powdery body supplier|
    US5667342A|1995-03-07|1997-09-16|Nordson Corporation|Method and apparatus for unloading powder coating material from a drum shaped container|
    JP2002071424A|2000-09-01|2002-03-08|Koei Sangyo Kk|Drum type feeder for quantitatively supplying granules|FR3043995B1|2015-11-19|2017-12-22|Imv Tech|DEVICE FOR FEEDING AND POSITIONING ANIMAL SEED CONDITIONING FLAKES AND TREATMENT PLANT COMPRISING SUCH A DEVICE|
    CN110395590B|2019-07-12|2021-01-26|常州君合表面涂覆工程有限公司|Automatic feeding and discharging device for workpiece cleaning|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014184886A|JP5680787B1|2014-09-11|2014-09-11|Powder feeder|
    PCT/JP2015/072995|WO2016006717A1|2014-09-11|2015-08-17|Powder supply apparatus|
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