JP2007260584A - Apparatus for feeding powder coating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for feeding a powder coating material which can surely feed predetermined amount of the coating material without being affected by a nature of the powder coating material. <P>SOLUTION: The apparatus (1) for feeding the powder coating material is provided with a rotary table (2), a hopper (3) which is disposed above the rotary table (2) and at an arbitrary place of a lower end part of which a coating material discharge port (501) is formed, an agitation means (8) which is disposed in the hopper (3) and which agitates the coating material in the hopper (3), a scraper (9) for rough scraping which is disposed at an arbitrary place above the rotary table (2) with predetermined spacing between the rotary table (2) and itself, one or two or more scrapers (13) for precise scraping which are disposed behind the scraper (9) for rough scraping when viewed in a rotary direction of the rotary table (2). In the apparatus (1) for feeding the powder coating material, a vibration means (10) is connected with the scraper (9) for rough scraping. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a powder coating material supply apparatus, and more particularly to a powder coating material supply apparatus that can reliably supply a planned discharge material without being affected by the characteristics of the powder coating material.

  Conventionally, when coating with powder paint, a hopper with powder paint inside is used, and the powder paint is supplied from the hopper onto the rotary table and is conveyed along with the rotation of the rotary table. A method is generally employed in which the powder coating material is scraped off by a scraper and dropped into a chute, thereby supplying the powder coating material.

  That is, FIG. 3 is a perspective view showing a powder coating material supply device 31 conventionally used. In the figure, the conventional powder coating material supply device 31 includes a motor 33 on a base 39 provided with legs 40. The rotary table 32 is connected to the motor 33 so as to be rotatable. In addition, a hopper gate 3601 having an opening is provided in the lower portion above the rotary table 32, and a hopper 34 provided with a stirring rod (not shown) is provided therein. And a hopper lower part 36 are integrally formed and fixed to a fixing table 37 connected to the base 39 by a connecting member 38.

  The rotary table 32 rotates while sliding with the lower end portion of the hopper 34, whereby the powder coating material in the hopper 34 is pushed out from the hopper gate 3601 onto the rotary table 32 while being stirred by the stirring rod.

  A rough scraping scraper 41 is disposed at an arbitrary position of the rotary table 32 at a predetermined distance between the lower end portion of the rotary table 32 and the rotary table 32, and is pushed onto the rotary table 32. In the process of passing between the rotary table 32 and the lower end of the rough scraping scraper 41, the height of the powder coating material is conveyed to the rough scraping scraper 41 as the rotary table 32 rotates. Is made uniform.

  Further, a scraping scraper 42 for fine scraping is disposed behind the rough scraping scraper 41 when viewed in the rotating direction of the rotating table 32 in such a manner that its lower end portion can slide on the upper surface of the rotating table 32. The powder coating material having a uniform height by the rough scraping scraper 41 falls onto a chute 43 disposed below the rotary table 32 while being scraped off by the scraping scraper 42. Thereafter, the paint is supplied to the coating apparatus via the paint conveyance path connected to the chute 43.

  However, in such a conventional powder coating material supply apparatus, when the coating material is scraped by the scraping scraper 42, the coating material conveyed by the rotary table 32 is finely scraped until the amount reaches a certain amount. Since it is accumulated in the scraping scraper 42 portion and when the amount exceeds a certain amount, it collects and falls into the chute 43, so that the coating material is supplied in a pulsating manner to the coating material conveyance path, thereby Uniform supply of paint has been difficult.

Therefore, the applicant of the present invention has two scraper scrapers as a method for solving the problems of the conventional powder coating material supply apparatus, and the positions of the respective tip portions are different. This makes it possible to drop the powder coating material into the chute without breaks.
JP-A-2005-224708

  However, with two scrapers for scraping as described above, the positions of the respective tip portions are different, and even when it is possible to drop the powder paint into the chute without breaks, Depending on the properties of the powder coating material to be supplied, the planned supply amount may not be ensured.

  For example, some powder paints tend to solidify, and when supplying such powder paints that tend to solidify, the paint can clump into the powder paint pushed out from the hopper to the rotary table. However, in such a case, the hardened paint is caught by the rough scraping scraper and stopped, and this causes a dent that is continuous with the powder paint that has passed through the rough scraping scraper. A streak is formed.

  That is, the powder coating material that has been transported to the rough scraper scraper has a uniform height due to the lower end of the rough scraper scraper as it passes between the lower end of the rough scraper scraper and the upper surface of the rotary table. However, if a solid powder coating is caught on the rough scraping scraper, the gap between the rough scraping scraper and the upper surface of the rotary table will be narrowed. The passed paint becomes lower in height than other parts. Therefore, in such a case, a concave streak continuous with the powder coating material that has been passed through the rough scraping scraper is formed.

  Then, as described above, even if the two scrapers for scraping are provided and the positions of the respective tip portions are different, the powder paint can be dropped into the chute without any breaks. This makes it impossible to drop the initially planned amount of powder paint onto the chute.

  Accordingly, an object of the present invention is to provide a powder coating material supply apparatus that can reliably supply a predetermined amount of coating material without being affected by the characteristics of the powder coating material to be used.

  A powder coating material supply apparatus according to the present invention includes a rotary table for transporting a coating material, a hopper disposed above the rotary table and having a paint discharge port formed at an arbitrary position on the lower end, and the hopper A rough scraper disposed at a predetermined interval above the rotary table and an agitating means for agitating the paint in the hopper disposed on the rotary table. Powder coating supply comprising: a scraper; and one or a plurality of fine scraping scrapers disposed behind the rough scraping scraper when viewed in the rotation direction of the rotating table above the rotating table In the apparatus, vibration means is connected to the rough scraping scraper.

  According to the experiments of the present inventor, even when there is a lump in the powder coating material supplied by the rotary table, by vibrating the scraping scraper, the solidified coating material is finely crushed by this vibration. It has been found possible to pass through a scraping scraper.

  Therefore, according to the present invention in which the vibration means is connected to the rough scraping scraper, even if a lump is mixed in the powder coating material supplied on the rotary table, the rough scraping is caused by the influence of the solid coating material. It is possible to effectively prevent the formation of a concave streak in the paint that has passed through the take-up scraper.

  The powder coating material supply apparatus of the present invention has a rotary table for transporting the coating material, and a hopper is disposed above the rotary table.

  The hopper is formed with a hopper gate as a paint discharge port at an arbitrary position at the lower end portion, and the lower end thereof is arranged so as to be slidable with the rotary table. Stirring means is provided.

  In addition, a rough scraping scraper for making the height of the paint conveyed by the rotating table uniform is disposed at an arbitrary position on the rotating table. In addition, an arbitrary interval is formed between the lower end portion and the upper surface of the rotary table.

  In addition, on the rear side of the rough scraping scraper when viewed in the rotation direction of the rotary table, a precision coating for scraping and dropping the paint having a uniform height by the rough scraping scraper to be dropped from the rotary table. A scraper for scraping is disposed, and the scraper for scraping is disposed such that the upper surface of the rotary table is slidable with the lower end of the scraper for scraping.

  The rough scraper scraper is connected to vibration means for finely vibrating the rough scraper scraper.

  Here, the hopper is composed of a lower hopper and the lower hopper so that the upper hopper can be separated, and at the lower part of the upper hopper, the paint is prevented from dropping from the upper hopper to the lower hopper. It is preferable to provide a shutter, which makes it easy to replace the paint.

  In addition, vibration means may be connected to the scraper for scraping, so that it is possible to drop the powder coating material into the chute without a plurality of scrapers for scraping. is there.

  An embodiment of the powder coating material supply apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing the powder coating material supply apparatus of the present embodiment. In FIG. It is a body paint supply device. The powder coating material supply apparatus 1 of the present embodiment has a gantry 21 provided with legs 2101, a rotary table for conveying the powder coating material on the gantry 21, and the rotary table. And a hopper for supplying the powder coating material.

  That is, in the figure, reference numeral 2 denotes a rotary table, and this rotary table 2 is connected to a motor 22 as a driving means mounted on a gantry 21 and is thereby rotatable.

  The hopper 3 is disposed above the turntable 2 by a support column 23. When the hopper 3 is placed, the turntable 2 can be rotated while sliding with the lower end portion of the hopper 3. It is considered as an arrangement.

  Here, the hopper 3 will be described. In this embodiment, the hopper 3 is composed of an upper hopper 4 and a lower hopper 5, and the lower hopper 5 has a substantially cylindrical shape. 21 is fixed.

  Further, a hopper gate 501 as a paint discharge port is formed at an arbitrary position in the lower portion of the lower hopper 5, and this hopper gate 501 is covered with a gate cover 502 except for a lower end portion.

  On the other hand, the upper hopper 4 is formed in a hollow shape as a whole, and has an upper portion 401 having the same diameter, an intermediate portion 402 that is continuous with the upper portion 401 and goes downward, and thus has a tapered diameter, and this intermediate portion. And a connecting portion 403 having a substantially cylindrical shape continuous to 402. The outer diameter of the connecting portion 403 is slightly smaller than the inner diameter of the lower hopper 5, thereby enabling the connecting portion 403 to be inserted into the lower hopper 5. The hopper 4 is detachable. Further, a shutter case 6 having a shutter insertion hole 601 is interposed between the upper portion 401 and the intermediate portion 402 of the upper hopper 4, and the shutter 7 is inserted into the shutter insertion hole 601 so that the shutter 7 can be inserted and removed. Has been.

  The shutter 7 is provided with a passage hole 701 in about half of the shutter 7, and when the passage hole 701 is inserted into the shutter insertion hole 601, the upper part 402 and the intermediate part 402 communicate with each other. On the other hand, when the portion where the passage hole 701 is not formed is inserted into the shutter insertion hole 601, communication between the upper portion 402 and the intermediate portion 402 is blocked.

  Therefore, according to the powder coating material supply apparatus 1 of the present embodiment, the portion of the shutter 7 where the passage hole 701 is not formed is inserted into the shutter insertion hole 601, thereby the upper portion 402 and the intermediate portion 402 of the upper hopper 4. The upper hopper 4 is removed from the lower hopper 5 in a state where communication with the lower hopper 5 is removed, the powder paint remaining in the lower hopper 5 is removed and the lower hopper 5 is cleaned, and then the portion of the passage hole 701 of the shutter 7 is removed. By mounting the other upper hopper 4 in a state in which is inserted into the shutter insertion hole 601 on the lower hopper 5, the paint can be easily replaced.

  However, in the powder coating material supply apparatus of the present invention, it is not always necessary to separate the hopper into the upper hopper and the lower hopper, and an integrated hopper may be used as in the conventional powder coating material supply apparatus.

  Next, the rotary table 2 is equipped with a stirring means, whereby the powder coating material in the hopper 3 can be stirred. That is, FIG. 2 is a diagram for explaining the relationship between the rotary table 2 and the stirring means. In the figure, 2 is a rotary table and 8 is a stirring rod as stirring means. Further, a locking portion 201 protrudes from a substantially central portion on the upper surface of the rotary table 2, and a locking protrusion 202 protrudes laterally on the side wall of the locking portion 201. An agitation means for agitating the powder coating material in the hopper 3 can be attached to the upper surface of the rotary table 2 via the locking projection 202.

  On the other hand, in this embodiment, the stirring rod 8 has a rotating shaft 801, and an insertion hole 802 is formed in the lower end portion of the rotating shaft 801 in the longitudinal direction of the rotating shaft 801. A pair of locking grooves 803 are formed on the side wall of the lower end portion of the rotating shaft 801 so as to be opposed to each other so as to communicate with the insertion hole 802. In addition, a stirring portion 804 is provided at an arbitrary position of the rotary shaft 801, and the locking portion 201 is inserted into the insertion hole 802 and rotated in such an arrangement that the locking projection 202 fits into the locking groove 803. By mounting the shaft 801 on the locking portion 201, the stirring rod 8 is rotated along with the rotation of the rotary table 2, whereby the powder coating material in the hopper 3 can be stirred.

  Next, a scraping scraper 9 for rough scraping is disposed at an arbitrary position above the rotary table 2 in such a manner that a predetermined distance is secured between the upper surface of the rotary table 2 by a support 24. The rough scraping scraper 9 makes it possible to make the height of the powder coating material extruded onto the rotary table 2 uniform.

  That is, the powder coating material in the hopper 3 is pushed out onto the rotary table 2 through the hopper gate 501 and is conveyed along with the rotation of the rotary table 2. When reaching the location, the rough scraping scraper 9 becomes an obstacle, and only the powder paint that can pass between the upper surface of the rotary table 2 and the rough scraping scraper 9 passes through the rough scraping scraper 9, Thereby, it becomes possible to make the height of the powder coating material extruded on the turntable 2 uniform.

  In the figure, reference numeral 10 denotes vibration generating means. That is, in the powder coating material supply apparatus 1 of the present embodiment, the vibration generating means 10 is connected to the rough scraping scraper 9, thereby causing the rough scraping scraper 9 to vibrate finely and for rough scraping. It is possible to secure the planned supply fee by preventing the powder coating solidified on the scraper 9 from being caught.

  That is, as described above, some powder paints tend to solidify, and when supplying such powder paints, there is a mass in the powder paint extruded on the rotary table. It may end up. In the state where such a hardened powder paint exists, if no treatment is performed, the hardened paint may be caught by the rough scraping scraper and stop. In the portion where the hardened paint is caught, the gap between the rough scraping scraper and the upper surface of the rotary table becomes narrow.

  As a result, the powder coating that has passed through the narrowed portion becomes lower in height than the powder coating that has passed through the other portion, and as a result, the powder coating passes through the rough scraping scraper 9. Indented streaks are formed in the powder coating. That is, the powder coating material that has passed through the rough scraping scraper 9 is less than the scheduled charge. Therefore, in such a case, it becomes impossible to drop the amount of the powder coating material initially planned on the chute.

  However, in the powder coating material supply apparatus 1 of the present embodiment, the vibration generating means 10 is connected to the rough scraping scraper 9, thereby causing the rough scraping scraper 9 to vibrate finely, and the powder coating solidified by this vibration. Therefore, it is possible to prevent the formation of concave streaks that are continuous with the powder coating material that has been passed through the rough scraping scraper 9 as described above.

  That is, in the experiment of the present applicant, when the handle portion of the electric toothbrush is connected to the rough scraping scraper 9 and the rough scraping scraper 9 is vibrated finely, even when a powder paint that tends to harden is supplied, It was possible to effectively prevent the occurrence of such a phenomenon. Therefore, any vibration generating means 10 may be used as long as it generates fine vibration such as a handle of an electric toothbrush.

  In the figure, reference numeral 11 denotes a rough scraping chute for receiving the powder coating dropped from the rotary table 2 when the height of the powder coating is adjusted by the rough scraping scraper 9.

  Next, on the rear side of the rough scraping scraper 9 facing the rotation direction of the rotary table 2, the powder that has passed through the rough scraping scraper 9 along with the rotation of the rotary table 2 while being supported by the support column 25. A scraper 13 for scraping for dropping the body paint from the rotary table 2 is disposed, and a scraper 13 for scraping is disposed below the rotary table 2 in the vicinity of the scraper 13 for scraping. A fine scraping chute 14 is arranged for receiving the powder paint scraped in step (b).

  In this embodiment, two scrapers 13 for scraping are provided, and the front end of the scraper 13b on the rear side as viewed in the rotation direction of the rotary table 2 is connected to the front end of the scraper 13a on the front side. In addition, the length of the rotary table 2 is increased toward the center of the rotary table 2, thereby making it possible to make the amount of paint falling into the fine scraping chute 14 uniform.

  That is, when scraping off the powder paint conveyed on the rotary table with a scraper, it is accumulated in the scraper portion for scraping until the amount of the powder paint conveyed on the rotary table reaches a certain amount, When the amount exceeds a certain amount, they are gathered and dropped onto the chute. Therefore, it takes time until a certain amount of powder coating material accumulates next in the vicinity of the scraper, whereby the coating material is supplied in a pulsating manner, and uniform supply of the coating material becomes difficult.

  However, in this embodiment, since two scrapers are arranged and the tip position of the scraper 13b located on the rear side is longer than the tip position of the scraper 13a on the near side, the vicinity of the scraper 13a on the near side is provided. During the accumulation of the powder coating material, the powder coating material is also accumulated in the vicinity of the rear scraper 13b slightly behind the case of the front scraper 13a, and is scraped by the front scraper 13a. Powder that has been scraped off by the scraper 13b on the rear side until a certain amount of powder paint has accumulated in the vicinity of the scraper 13a on the front side after the powder coating material taken falls into the scraping chute 14 The body paint reaches a certain amount and falls into the scraping chute 14. Therefore, the paint can be dropped into the fine scraping chute 14 without any interruption, and it becomes possible to supply the paint uniformly to the coating apparatus.

  However, it is not always necessary to provide two scrapers for scraping. That is, according to the experiment of the present applicant, the vibration generating means similar to the vibration generating means described above is connected to the scraper for scraping, and the scraper for scraping is removed by vibrating the scraper for scraping. Since it was found that the paint can be dropped into the scraping chute 14 without interruption without providing a sheet, the scraper for scraping is made into one sheet, and a fine vibration such as a handle of an electric toothbrush is added thereto. Vibration generating means capable of generating the above may be coupled.

  Next, the operation of the powder coating material supply apparatus 1 of this embodiment configured as described above will be explained. In the powder coating material supply apparatus 1 of this embodiment of this embodiment, the powder coating material is put in the hopper 3. When the rotary table 2 is rotated in this state, the powder coating material in the hopper 3 is agitated by the stirring rod 8 rotating in the hopper 3 and is also pushed out of the hopper gate 501 onto the rotary table 2 and rotated. It is conveyed along with the rotation of the table 2.

  Next, the powder coating material on the rotary table 2 is first arranged at a certain height by the rough scraping scraper 9 and then scraped by the scraping scraper 13 while being scraped by the scraping chute 14. And is supplied to the painting equipment.

  At this time, in the powder coating material supply apparatus 1 of the present embodiment, the vibration means 10 is connected to the rough scraping scraper 9 and the rough scraping scraper 9 is vibrated finely. Even when the hardened paint is mixed in the powder paint, the hardened powder paint can be crushed by the vibration, and this is done through the rough scraping scraper 9. It is possible to effectively prevent the formation of continuous streaks in the powder coating, and as a result, it is possible to reliably supply a predetermined supply amount to the coating apparatus.

  The powder coating material supply apparatus of the present invention connects the vibration means to the rough scraping scraper to prevent the hardened coating material from being caught on the rough scraping scraper and to reliably supply a predetermined amount of coating material. Since it can be supplied, the present invention can be applied to all types of powder coating material supply apparatuses in which the powder coating material conveyed by the rotary table is made to have a uniform height by a scraping scraper.

It is a schematic perspective view which shows the Example of the powder coating material supply apparatus of this invention. It is a figure for demonstrating the relationship between a rotary table and a stirring rod. It is a figure for demonstrating the conventional powder coating material supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Powder coating material supply apparatus 2 Rotary table 201 Locking part 202 Locking protrusion 3 Hopper 4 Upper hopper 401 Upper 402 Middle part 403 Connection part 5 Lower hopper 501 Hopper gate 502 Gate cover 6 Shutter case 601 Shutter insertion hole 7 Shutter 701 passage Hole 8 Stirring rod 801 Rotating shaft 802 Insertion hole 803 Locking groove 804 Stirring unit 9 Rough scraping scraper 10 Vibration generating means 11 Rough scraping chute 13 Precision scraping scraper 13a Scraping scraper located on the front side 13b Scraping scraper 14 located on the rear side 14 Scraping chute 21 Mounting base 22 Motor 23 Support column 24 Supporting the rough scraper Support column 25 Supporting the scraping scraper

Claims (3)

A rotary table (2) for conveying the paint, a hopper (3) disposed above the rotary table (2) and having a paint discharge port (501) formed at an arbitrary position on the lower end portion; A stirring means (8) disposed in the hopper (3) for stirring the paint in the hopper (3), and the rotary table (2) at an arbitrary position above the rotary table (2). A rough scraper (9) disposed at a predetermined interval between the scraper (9) and the rough scraper when viewed in the rotational direction of the rotary table (2) above the rotary table (2) In the powder coating material supply apparatus (1), comprising one or more scraping scrapers (13) disposed behind the scraper (9),
A powder coating material supply apparatus, wherein a vibration means (10) is connected to the rough scraping scraper (9).   The hopper (3) is composed of a lower hopper (5) and an upper hopper (4) that is detachably attached to the lower hopper (5), and an upper hopper (4 2. The powder coating material supply device according to claim 1, further comprising a shutter (7) for preventing the coating material from dropping from the hopper to the lower hopper (5).   The powder coating material supply apparatus according to claim 1 or 2, wherein the fine scraping scraper (13) is connected to a vibration means.

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