JP2014147923A - Coating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating device capable of smoothly discharging, out of a rotary drum, granules in the interior of the rotary drum via a discharge member such as a discharge plate, etc., of performing a safe and efficient checkup operation, etc., and of inhibiting, in a case where a treatment gas is fed into the rotary drum interior via a mouth ring unit from an aperture unit on one terminal side, the turbulence of the flow of the treatment gas by the rotation of the discharge member.SOLUTION: The anterior terminal portion of a rotary drum 1 is constituted by a cyclic mouth ring unit 1d. An anterior terminal aperture unit 1e is configured on the anterior terminal of the mouth ring unit 1d. The inner circumferential surface 1d1 of the mouth ring unit 1d is formed as a conical surface having a progressively expanding diameter toward the forward side. A discharge plate is configured in the interior of the rotary drum 1. Granules in the interior of the rotary drum 1 are guided to the mouth ring unit 1d by the discharge plate based on the rotation of the rotary drum. The granules guided to the mouth ring unit 1d, furthermore, are discharged out of the rotary drum 1 via the anterior terminal aperture unit 1e after having been guided by the inner circumferential surface 1d1 of the mouth ring unit 1d.

Description

  The present invention relates to a coating apparatus that performs coating, mixing, drying, and the like of powders of pharmaceuticals, foods, agricultural chemicals, and the like, and more particularly, to a coating apparatus that includes a ventilation-type rotating drum that is driven to rotate about an axis.

  It is equipped with a rotating drum for film coating, sugar coating, etc. on tablets such as pharmaceuticals, foods, agricultural chemicals, soft capsules, pellets, granules, etc. (hereinafter collectively referred to as powders). Coating equipment is used.

  This type of coating apparatus is disclosed, for example, in Patent Documents 1 and 2 below.

  The coating apparatus disclosed in Patent Documents 1 and 2 includes a ventilation-type rotating drum that is driven to rotate about a horizontal axis. The peripheral wall portion of the rotating drum has a polygonal cross-sectional shape, and each side surface of the peripheral wall portion is given air permeability by a porous portion. A jacket is attached to each outer peripheral side of each side surface of the peripheral wall portion, and a ventilation channel is formed between the jacket and each side surface of the peripheral wall portion. In addition, a ventilation mechanism for controlling the flow of processing gas such as dry air to the rotating drum is disposed on the other end side of the rotating drum, that is, the side where the rotation driving mechanism including a motor or the like is installed. This ventilation mechanism has a function of communicating the ventilation channels that have come to predetermined positions with the rotation of the rotary drum, respectively, with the air supply duct and the exhaust duct.

  The annular mouth ring portion constituting the front end portion of the rotating drum has an inner peripheral surface formed on a cylindrical surface along the axis of the rotating drum, and a front end opening is provided at the front end of the mouth ring portion. Moreover, the discharge plate which discharges | emits the granular material product after a coating process is provided in the inside of a rotating drum. The front end of the discharge plate extends to the front end opening through the mouth ring, and as the rotary drum rotates, the powder product inside the rotary drum is guided to the front end opening by the discharge plate, and the front end opening To the outside of the rotating drum.

Japanese Patent No. 4064190 JP 2000-354754 A

  In the conventional coating apparatus, the inner peripheral surface of the mouth ring portion of the rotating drum is formed in a cylindrical surface along the axis, and when the powder product in the rotating drum is discharged by the discharge plate, the front end of the discharge plate To the front end opening, and it was necessary to guide the granular product to the front end opening by the discharge plate by the rotation of the rotating drum. However, in such a structure, the front end portion of the discharge plate that extends to the front end opening via the mouth ring portion rotates with the rotation of the rotating drum, so that the inspection of the inside of the rotating drum, etc. The operator needs to pay attention to the front end portion of the rotating discharge plate, which may hinder safe and efficient inspection work.

  In addition, when the processing gas is supplied from the front end opening to the inside of the rotating drum via the mouth ring portion, the flow of the processing gas may be disturbed by the rotation of the front end portion of the discharge plate.

  An object of the present invention is to enable a discharge member such as a discharge plate to smoothly discharge powder particles inside the rotary drum to the outside of the rotary drum, and to perform inspection work etc. safely and efficiently. It is to provide a coating apparatus that can.

  Another object of the present invention is to enable a discharge member such as a discharge plate to smoothly discharge powder particles inside the rotary drum to the outside of the rotary drum, and to remove the processing gas from the opening through the mouth ring portion. When the air is supplied to the inside of the rotating drum, the flow of the processing gas is prevented or suppressed from being disturbed by the rotation of the discharge member.

  In order to solve the above-mentioned problems, the present invention is a ventilating rotary drum in which a granular material to be processed is housed and rotated around its axis, and one end of the drum is an annular mouth ring. A rotating drum provided with an opening on one end at one end of the mouth ring portion, and a discharge member provided inside the rotating drum for discharging powder particles inside the rotating drum to the outside of the rotating drum; In the coating apparatus, the inner peripheral surface of the mouth ring portion is formed in a shape that gradually increases in diameter toward one end, and the discharge member removes the powder particles inside the rotary drum by the rotation of the rotary drum. The granular material guided to the mouth ring part is guided to the inner peripheral surface of the mouth ring part and discharged from the one end side opening part to the outside of the rotating drum.

  In the present invention, it is preferable that one end of the discharge member extends to the axial position of the other end of the mouth ring portion.

  In this invention, an air supply part can be set as the structure which supplies process gas to the inside of a rotating drum via a mouth ring part.

  In the present invention, baffles that are provided inside the rotary drum and stir the powder particles inside the rotary drum by the rotation of the rotary drum are provided at predetermined intervals in the circumferential direction of the rotary drum, and the height from the inner surface of the rotary drum is high. A plurality of upper baffles and lower baffles having different lengths can be used.

  In the present invention, one or a plurality of spray nozzles for spraying the spray liquid onto the granular material layer inside the rotating drum is a vertical surface that is on the outer diameter side than the diameter of the opening on one end side and includes the axis of the rotating drum. In contrast, the spray liquid can be sprayed at a position on the front side in the rotation direction.

  According to the present invention, the granular material inside the rotating drum can be smoothly discharged from the opening on the one end side through the mouth ring portion by the discharge member such as the discharge plate, and the inspection work and the like can be safely performed. And the coating apparatus which can be performed efficiently can be provided.

  Further, according to the present invention, the powder member inside the rotating drum can be smoothly discharged from the opening on the one end side through the mouth ring portion by the discharge member such as the discharge plate, and the processing gas can be discharged. When air is supplied from the one end side opening to the inside of the rotating drum via the mouth ring portion, it is possible to prevent or suppress the flow of the processing gas from being disturbed by the rotation of the discharge member.

It is a longitudinal cross-sectional view of the coating apparatus which concerns on embodiment of this invention. It is the figure which looked at the front panel from the front side. FIG. 3 is a transverse sectional view {FIG. 3 (a)} and a longitudinal sectional view {FIG. 3 (b)} of the rotating drum. FIG. 4 is an enlarged cross-sectional view {FIG. 4A) showing the periphery of the peripheral wall portion of the rotating drum, and an enlarged cross-sectional view {FIG. It is an expanded sectional view showing the circumference of the end of a rotating drum. It is an expanded view inside a rotating drum. It is the perspective view which looked at the inside of a rotating drum from the mouth ring part side. It is a figure which shows a baffle. It is a cross-sectional view which shows the motion of the granular material within the rotating drum of the conventional coating apparatus. It is a cross-sectional view of a coating apparatus. It is the partial sectional view which looked at the nozzle movement mechanism from the upper part. It is the schematic cross-sectional view which looked at the rotating drum from the front side. It is a figure which shows the air supply part by the side of the front-end part of a rotating drum, the figure {FIG. 13 (a)} which looked at the front-end part of the casing from the front side, and the longitudinal cross-sectional view {FIG. )}. It is the schematic cross-sectional view which looked at the rotating drum from the back side.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the coating apparatus according to this embodiment includes a ventilating rotary drum 1 that is driven to rotate about an axis X that is parallel or substantially parallel to the horizontal line. The rotary drum 1 is rotatably accommodated in the casing 2 and is rotationally driven by a rotational drive mechanism 3 disposed on the rear end side. Further, the rotary drum 1 is accommodated inside the casing 2 inside the internal housing 4, and the space portion of the internal housing 4 is hermetically sealed against the outside. Furthermore, a spray nozzle unit 5 having one or a plurality of spray nozzles 5a for spraying a spray liquid such as a film material liquid toward the granular material layer is disposed inside the rotary drum 1. In this embodiment, the rotary drum 1 has a front end opening 1e at the front end and a rear end opening 1g at the rear end. In addition, air supply portions A1 and A2 are provided on the front end opening portion 1e and the rear end opening portion 1g, respectively.

  The front end of the casing 2 constitutes a chamber 2a, and the front surface of the chamber 2a is closed by a front panel 2b having an inspection window 2b1. The chamber 2a accommodates a vertical movement mechanism 8 and an airflow guide member 20 described later. Moreover, the discharge port 2c of the granular material (processed granular material product: For example, tablet) is provided in the lower part of the chamber 2a.

  The spray nozzle unit 5 is attached to a distal end portion of an L-shaped support pipe 6 via a connection pipe 7, and a proximal end portion of the support pipe 6 is connected to a vertical movement mechanism 8 attached to the inner surface side of the front panel 2b. Has been. The vertical movement mechanism 8 can adjust the vertical position of the spray nozzle unit 5 manually or automatically (by an actuator mechanism such as an air cylinder or a ball screw). Further, a nozzle moving mechanism 9 described later is connected to the front panel 2b, and the nozzle moving mechanism 9 can move the front panel 2b along with the spray nozzle unit 5 in the axis X direction of the rotary drum 1. In addition, it can be swung between a first position P1 indicated by a one-dot chain line and a second position P2 indicated by a solid line in FIG.

  As shown in FIG. 3, in this embodiment, the rotating drum 1 includes a peripheral wall portion 1 a having a polygonal cross-sectional shape (for example, a pentagonal shape, a dodecagonal shape, and a dodecagonal shape in this embodiment), and a front end of the peripheral wall portion 1 a. And an end wall portion 1c continuous to the rear end of the peripheral wall portion 1a. On each side surface of the peripheral wall portion 1a, a ventilation portion formed of a porous portion is provided. In this embodiment, the ventilation portion is formed by attaching a perforated plate to each side surface of the peripheral wall portion 1a. The front end of the end wall portion 1b is continuous with the rear end of the annular mouth ring portion 1d, and a front end opening 1e is provided at the front end of the mouth ring portion 1d. The inner peripheral surface 1d1 of the mouth ring portion 1d is formed in a shape that gradually increases in diameter toward the front, for example, a conical surface that gradually increases in diameter toward the front by a cone angle of an angle α (angle formed with the axis of the rotary drum 1). Has been. The inclination angle α of the inner peripheral surface 1d1 is preferably 5 ° or more, for example. Moreover, the connection part 1f is provided in the rear end of the end wall part 1c, and the rear-end opening part 1g is provided in the connection part 1f. An extension portion 1h (see FIG. 1) used for mounting a drive system component that rotationally drives the rotary drum 1 is connected to the connection portion 1f. The inner peripheral surface 1d1 of the mouth ring portion 1d may be formed in a shape that gradually increases in diameter toward the front, and does not necessarily have to be formed in a conical surface. For example, the inner peripheral surface 1d1 of the mouth ring portion 1d may be formed in a shape that is gradually expanded in a curved shape toward the front.

  In this embodiment, annular seal rings 13 are provided at both axial ends of the peripheral wall portion 1a of the rotary drum 1, and a plurality of partition portions 14 are provided at predetermined intervals in the rotation direction on the outer periphery of the peripheral wall portion 1a. It has been. The partition part 14 has a plate-like form as a whole, has a longitudinal direction dimension substantially the same as the axial dimension of the peripheral wall part 1 a, and is arranged on the outer periphery of the peripheral wall part 1 a in a direction parallel to the axis of the rotary drum 1. Moreover, the partition part 14 is each arrange | positioned at each top part 1a2 and each side surface 1a1 of the polygonal surrounding wall part 1a. When the rotary drum 1 rotates, the seal ring 13 and the partition portion 14 are in sliding contact with the sliding contact portion 10a (see FIG. 10) of the ventilation member 10 having the ventilation hole 10b.

  As shown in FIG. 4, in this embodiment, the partition part 14 is in a state in which the base part 14a fixed to the outer periphery of the peripheral wall part 1a and the base part 14a are allowed to move in the inner and outer peripheral directions of the peripheral wall part 1a. And a mounted seal member 14b. The base portion 14a is formed in a flat plate shape with a metal material or the like, and is fixed to the outer periphery of the peripheral wall portion 1a by an appropriate means such as welding in a direction parallel to the axis of the rotary drum 1. The seal member 14b is formed in a flat plate shape using a synthetic resin material such as a fluorine-based resin (PTFE or the like) or a synthetic rubber material such as hard rubber, and is attached to one surface side or the other surface side of the base portion 14a. For example, the seal member 14b has a long hole 14b1 that is vertically long in the inner and outer peripheral directions of the peripheral wall portion 1a (see also FIG. 5), and is a bolt that is inserted into the long hole 14b1 via a resin or metal washer 14c. 14d is attached to the base portion 14a by being screwed into a bolt hole 14a1 provided in the base portion 14a. The seal member 14b is movable in the inner and outer peripheral directions of the peripheral wall portion 1a with respect to the base portion 14a within the gap between the elongated hole 14b1 and the shaft portion of the bolt 14d when mounted on the base portion 14a. . Therefore, when the seal member 14b receives a force directed in the outer circumferential direction, the seal member 14b moves in the outer circumferential direction while being in sliding contact with one surface or the other surface of the base portion 14a, and the distal end portion of the ventilation member 10 has a force commensurate with the above force. It press-contacts to the sliding contact part 10a. As a means for applying the external force to the seal member 14b, an elastic biasing means such as a spring may be used. However, in this embodiment, the sealing is performed by a centrifugal force accompanying the rotation of the rotary drum 1 from the point of simplification of the structure. A means for urging the member 14b in the outer circumferential direction is employed. Further, a pin may be used instead of the bolt 14d.

  As shown in FIG. 5, the seal ring 13 includes a base portion 13a fixed to the outer periphery of the end portion of the peripheral wall portion 1a, and a seal member 13b attached to the base portion 13a. The base portion 13a is formed in a ring plate shape with a metal material or the like, and is fixed to the outer periphery of the end portion of the rotary drum 1 by appropriate means such as welding. The seal member 13b is formed in a ring plate shape (including a ring plate shape formed by combining a plurality of partial ring plate materials) with a synthetic resin material such as a fluororesin (PTFE or the like) or a synthetic rubber material such as hard rubber. It is mounted on the outer surface side of the base portion 13a. For example, the seal member 13b has a long hole 13b1 that is vertically long in the inner and outer peripheral directions of the peripheral wall 1a, and a bolt 13d that is inserted into the long hole 13b1 through a resin or metal washer 13c is attached to the base 13a. By screwing into the provided bolt hole 13a1, it is fixedly attached to the base 13a. The seal member 13b is in a state of being fixedly attached to the base portion 13a, and a tip portion thereof is in pressure contact with the sliding contact portion 10a of the ventilation member 10. The seal member 13b is movable in the inner and outer peripheral directions of the peripheral wall portion 1a with respect to the base portion 13a within the gap between the elongated hole 13b1 and the shaft portion of the bolt 13d when mounted on the base portion 13a. It may be made to be. In this case, when the seal member 13b receives a force directed in the outer peripheral direction, the seal member 13b moves in the outer peripheral direction while being in sliding contact with one surface or the other surface of the base portion 13a. Is pressed against the sliding contact portion 10a. Moreover, it may replace with said volt | bolt 13d and may use a pin.

  FIG. 6 is a development view of the inside of the rotating drum 1, and FIG. 7 is a perspective view of the inside of the rotating drum 1 as viewed from the mouth ring portion 1d. In FIG. 7, powder particles (pharmaceutical tablets) are accommodated in the rotating drum 1, but the rotating drum 1 stops rotating. In this embodiment, baffles 68 and 69 and a discharge plate 70 as a discharge member are provided inside the rotary drum 1.

  The baffle is provided on the inner surface of the peripheral wall portion 1a. In this embodiment, the height from the inner surface of the peripheral wall portion 1a is relatively high in order to enhance the stirring and mixing effect of the granular material layer inside the rotary drum 1. Two types of baffles, a high upper baffle 68 and a lower lower baffle 69 are provided. In the illustrated example, eight upper baffles 68 are installed and all have the same shape and the same dimensions. Four lower baffles 69 are installed and all have the same shape and the same dimensions. Both the upper baffle 68 and the lower baffle 69 are plate-shaped. As will be described later, the height of the upper baffle 68 from the inner surface of the peripheral wall portion 1a can be adjusted. On the other hand, the lower baffle 69 is fixed to the peripheral wall 1a, and the height from the inner surface of the peripheral wall 1a cannot be changed.

  The four lower baffles 69 are provided at equal intervals in the circumferential direction. Each lower baffle 69 extends from the vicinity of the rear end of the peripheral wall 62 to the vicinity of the front end over the four side walls 67 of the peripheral wall 1a. End portions of the lower baffle 69 adjacent in the circumferential direction are provided on the same side wall portion 67. Two upper baffles 68 are provided between the lower baffles 69. Each of the upper baffles 68 is provided on another side wall portion 67.

  Both the upper baffle 68 and the lower baffle 69 are inclined at the same angle with respect to the circumferential direction of the rotating drum (the horizontal direction in FIG. 6), but the directions of the inclinations are opposite to each other. is there. The inclination angle of the extending direction with respect to the circumferential direction is, for example, 15 to 25 °. The center in the extending direction of the upper baffle 68 is located at the center in the circumferential direction of the side wall portion 67. The center in the extending direction of the lower baffle 69 is located on the boundary line between the side wall portions 67 adjacent to each other on the circumferential center side of the four side wall portions 67.

  By dividing the region U of the peripheral wall portion 62 where the upper baffle 68 and the lower baffle 69 exist along the circumferential direction as shown by a two-dot chain line in FIG. 6, a plurality of axial lengths equal to each other (FIG. 6). 4), the number of the upper baffles 68 and the lower baffles 69 existing in the sections S is the same between the sections S. In FIG. 6, there are two upper baffles 68 and four lower baffles 69 in each section S.

  In this embodiment, there are 4 discharge plates 70 for discharging the powder particles (the powder product after the coating process) inside the rotary drum 1 on the end wall portion 1b continuous to the front end of the peripheral wall portion 1a. A sheet is provided. These four discharge plates 70 are provided at equal intervals in the circumferential direction. Each discharge plate 70 is composed of, for example, a plate-like member having a bent portion along the longitudinal direction, and extends from the rear end of the end wall portion 1b to the axial position of the front end (the rear end of the mouth ring portion 1d). The extending direction is inclined with respect to the circumferential direction of the rotating drum (the left-right direction in FIG. 6). In this embodiment, the front end portion of each discharge plate 70 is smoothly connected to the rear end of the mouth ring portion 1d. The direction of inclination of the discharge plate 70 is the same as the direction of inclination of the lower baffle 69.

  As shown in FIG. 8, the height H1 of the upper end 68a of the upper baffle 68 from the inner surface of the peripheral wall portion 1a (side wall portion 67) is higher than the height H2 of the upper end 69a of the lower baffle 69. The upper baffle 68 has, for example, a substantially trapezoidal shape in which a pair of side edges gradually approach toward the upper end 68 a, and is fixed to the inner surface of the side wall portion 67 via a height adjustment pin 72. There is a gap between them. One end of the height adjustment pin 72 is detachably attached to the upper baffle 68, and the other end is detachably attached to the outside of the rotating drum. The height adjustment pin 72 is a height adjustment pin having a different length. The position of the upper baffle 68 can be changed along the height direction. Since the height adjustment of the upper baffle 68 can be performed from the outside of the rotary drum 1, it is not necessary for the operator to enter the rotary drum 1 for the height adjustment. On the other hand, the lower baffle 69 has a lower end fixed directly to the inner surface of the side wall portion 67 and does not have a gap between the inner surface of the side wall portion 67. The height H1 'of the lower end 68b of the upper baffle 68 is equal to or higher than the height H2 of the upper end 69a of the lower baffle 69. In this embodiment, the height H1' of the lower end 68b is higher than the height H2 of the upper end 69a. Further, the width W 1 of the upper baffle 68 is the same as the width W 2 of the lower baffle 69.

  The front end portion (upper end portion) 68e of the upper baffle 68 may be inclined with respect to other portions. The direction of this inclination is on the side opposite to the rotation direction of the rotating drum when the powder is processed (direction A indicated by the white arrow in FIGS. 6 and 7) (the rear side in the rotation direction when the powder is processed). The inclination angle is preferably 25 to 45 °, more preferably 30 to 45 °. When the upper baffle 68 having the tip portion 68e inclined as described above is used, the powder particles being processed are prevented from colliding vertically with the tip portion 68e, and the powder particles are prevented from cracking or chipping. Can do. In addition, when the upper baffle 68 with the tip 68e inclined is used, when the granular material is discharged (when the rotating drum is rotated in the reverse direction: rotated in the direction opposite to the direction A indicated by the white arrow in FIGS. 6 and 7). The tip 68e serves to scoop up the powder. Due to the action of the tip portion 68e, the granular material is efficiently guided to the lower baffle 69 side and further guided from the lower baffle 69 to the discharge plate 70 side, so that the discharge amount of the granular material per hour increases. As a result, the discharge process time is shortened.

  The rotating drum 1 rotates in a direction A indicated by a white arrow in FIGS. 6 and 7 during the processing of the granular material. Since the extending direction of the upper baffle 68 and the extending direction of the lower baffle 69 are different, the direction in which the powder is moved by the upper baffle 68 and the direction in which the powder is moved by the lower baffle 69 are different. Thereby, compared with the case where the extension direction of a baffle is one type, it can make stirring and mixing efficiency favorable.

  In the conventional pan coating apparatus, as shown in FIG. 9, when the rotating drum D rotates in the direction A indicated by the white arrow, the following regions are generated in the granular material layer S. That is, it is formed in the vicinity of the inner surface of the rotating drum D by the rotation of the rotating drum D, and is formed on the surface layer portion of the granular material layer G by the gravity and the transport region in which the granular material moves in the direction indicated by the arrow Ah2, and by the arrow Ah3 It is a stagnation region Rs formed between the falling region where the granular material moves in the direction shown, and between the transport region and the falling region (near the center of the granular material layer G), and the movement of the granular material is slow. In this stagnation region Rs, since the movement of the powder particles is slow, there is a possibility that the mixing of the whole powder particle layer S becomes insufficient. On the other hand, in the rotary drum 1 of this embodiment, the baffle has a two-stage configuration of the upper baffle 68 and the lower baffle 69, so that the granular material in the region that is the stagnation region Rs effectively flows. It becomes possible to optimally stir and mix the entire granular material layer S. In addition, during the processing of the granular material, a phenomenon that part of the granular material particles are lifted by sticking to the inner surface of the rotary drum 1 and dropped from the upper part, or a part of the granular material particles are rolling. The phenomenon of jumping up is difficult to occur. Such falling and jumping of the granular particles not only causes damage and wear of the granular particles, but also the spray nozzle unit in which the falling or jumping granular particles are installed inside the rotating drum. It may be ejected to the mouth ring part by colliding with the mouse. In this case, when the inner peripheral surface 1d1 of the mouth ring portion 1d is formed in a conical surface as in this embodiment, the granular particles ejected to the mouth ring portion 1d slide on the inner peripheral surface 1d1 of the mouth ring portion 1d. However, in this embodiment, the baffle is configured as described above so that the powder particles are less likely to fall or jump up. The mouth ring portion 1d does not easily pop out, and even if the inner peripheral surface 1d1 of the mouth ring portion 1d is formed as a conical surface, the above problem does not occur or hardly occurs.

  When discharging the granular material (processed granular material product) from the inside of the rotating drum 1, the rotating drum 1 rotates in the direction opposite to the direction A indicated by the white arrow in FIGS. The powder particles inside the rotary drum 1 are guided to the end wall 1b side by the lower baffle 69 by the rotation of the rotary drum 1, and further scooped up by the discharge plate 70 provided on the end wall 1b. Guided to the ring portion 1d. Then, the granular material guided to the mouth ring portion 1d by the discharge plate 70 is guided to the inner circumferential surface 1d1 having a conical surface gradually enlarged at an angle α toward the front, and proceeds to the front side. 1e is discharged to the outside of the rotating drum 1. And the granular material discharged | emitted outside the rotating drum 1 is discharged | emitted out of the apparatus from the discharge port 2c of the front part of the casing 2. As shown in FIG.

  As described above, in this embodiment, at the time of discharging the granular material, by rotating (reversing) the rotating drum 1, the granular material inside the rotating drum 1 is guided to the mouth ring portion 1d by the discharging plate 70, and the mouse The conical inner peripheral surface 1d1 of the ring portion 1d is slid and guided forward, and discharged from the front end opening 1e to the outside of the rotating drum 1. Thereby, even if the front end of the discharge plate 70 does not extend to the front end opening 1e as in the conventional device, the powder particles inside the rotary drum 1 can be discharged smoothly to the outside of the rotary drum 1. it can. That is, in this embodiment, the front end of the discharge plate 70 extends to the axial position of the rear end of the mouth ring portion 1d, and does not extend forward from that position. As described above, since the mouth ring portion 1d does not have the extending portion of the discharge plate 70, it is possible to safely and efficiently perform the inspection work and the like inside the rotary drum 1.

  As shown in FIG. 10, a duct-shaped ventilation member (exhaust member) 10 is provided on the lower outer peripheral side of the rotary drum 1. The ventilation member 10 communicates with the exhaust duct 12 via an exhaust passage 11 provided in the inner housing 4. The ventilation member 10 includes an arc-shaped sliding contact portion 10a in which the seal ring 13 of the rotary drum 1 and the partition portion 14 are in sliding contact, and a ventilation port (exhaust port) 10b provided in a part of the sliding contact portion 10a. Yes. The seal ring 13 and the partition 14 provided on the peripheral wall 1a of the rotating drum 1 are in sliding contact with the sliding contact portion 10a of the ventilation member 10 when the rotating drum 1 is rotated. A plurality of ventilation spaces C1 partitioned by the partitioning portion 14 at predetermined intervals in the rotation direction are formed. That is, one ventilation space C1 is formed by the seal rings 13 at both ends in the axial direction, the two partition portions 14 adjacent to each other in the rotation direction, and the outer periphery of the peripheral wall portion 1a, and this ventilation space C1 is an area of the ventilation hole 10b. A plurality are formed along the rotation direction. In this embodiment, the partition portions 14 are arranged on the top portions 1a2 and the side surfaces 1a1 of the polygonal peripheral wall portion 1a, respectively, so that the number of the top portions 1a2 of the peripheral wall portion 1a is larger than the number of the side surfaces 1a1. A number of ventilation spaces C1 are formed in the region of the vent 10b. The plurality of ventilation spaces C1 may partially or entirely have different rotational direction dimensions (the spacing between the partition portions 14 is unequal), but all preferably have the same rotational direction dimension. (The arrangement interval of the partition part 14 is equal intervals). Further, the partition portions 14 extend in the radial direction around the axis of the rotary drum 1 at each top portion 1a2, and extend in the direction orthogonal to the respective side surfaces 1a1 at each side surface 1a1, but all the partition portions 14 are provided. May extend in the radial direction, or at least one partition 14 may be inclined forward or backward (preferably backward) in the rotational direction.

  In this embodiment, the lower part of the inner housing 4 forms a cleaning bucket 4a (see also FIG. 1), and the ventilation member 10 is provided inside the cleaning bucket 4a. When the rotary drum 1 is cleaned, a cleaning liquid L such as cleaning water is supplied to the cleaning bucket 4a. The ventilation member 10 and the cleaning bucket 4a are provided with drainage ports 10c and 4b, respectively. The cleaning bucket 4a is provided with a bubble flow injection nozzle (a bubbling jet nozzle) (not shown) that injects a cleaning liquid in which bubbles are mixed into the cleaning liquid in the cleaning bucket 4a. Further, cleaning nozzles 10 d and 10 e for injecting the cleaning liquid are arranged inside the ventilation member 10, and a cleaning nozzle 11 a for injecting the cleaning liquid is arranged inside the exhaust passage 11, and the cleaning liquid is injected into the upper space of the internal housing 4. Cleaning nozzles 4c and 4d for spraying are arranged.

  FIG. 11 is a partial cross-sectional view of the nozzle moving mechanism 9 as viewed from above. In this embodiment, the nozzle moving mechanism 9 includes an axial direction moving mechanism 9A that moves the front panel 2b along with the spray nozzle unit 5 in the direction of the axis X of the rotary drum 1, and a first position indicated by a one-dot chain line in FIG. A nozzle position adjusting mechanism 9B that pivots between P1 and a second position P2 indicated by a solid line is provided. The axial movement mechanism 9A slide-guides the axial movement along the slide shafts 9a and 9b arranged in parallel to each other and the axes X1 and X2 (parallel to the axis X of the rotary drum 1) of the slide shafts 9a and 9b. The slide bearing portions 9c and 9d and the slide rails 9e and 9f are main components. The nozzle position adjusting mechanism 9B mainly includes rotating bearing portions 9g and 9h that support the rotation of the slide shafts 9a and 9b around the axes X1 and X2, and a rotation driving unit 9i that rotates the slide shaft 9b. This is a component.

  The front end portion of the slide shaft 9a is connected to the box 8a of the vertical movement mechanism 8 attached to the inner surface side of the front panel 2b, and the rear end portion of the slide shaft 9a is a slide provided in the housing of the rotary bearing portion 9g. It is slidably mounted on a slide rail 9e via a pin 9j. A piping pipe 9k is inserted through the slide shaft 9a. Inside the piping pipe 9k, piping tubes for supplying atomized gas (atomized air) or the like to the spray nozzles 5a of the spray nozzle unit 5 are accommodated. Connected to the spray nozzle 5a.

  The front end portion of the slide shaft 9b is connected to the turning shaft portion 9m attached to the inner surface side of the front panel 2b, and the rear end portion of the slide shaft 9b is connected to the slide pin 9n provided in the housing of the rotary bearing portion 9h. And is slidably mounted on the slide rail 9f. The turning shaft portion 9m has an eccentric member 9m1 attached to the front end portion of the slide shaft 9b, an eccentric pin 9m2 fixed to the eccentric member 9m1, and the eccentric pin 9m2 so as to be rotatable with respect to the inner wall of the front panel 2b. And an eccentric bearing portion 9m3 to be supported. The axis X3 of the eccentric pin 9m2 is eccentric by a predetermined amount from the axis X2 of the slide shaft 9b.

  The rotation drive unit 9i includes a drive motor 9i1 and a gear mechanism 9i2 that transmits the rotational force of the drive motor 9i1 to the slide shaft 9b. The drive motor 9i1 is attached to the housing of the rotation bearing portion 9h (and / or the rotation bearing portion 9g), and the rotation drive portion 9i has a shaft along with the slide shaft 9b (and / or the slide shaft 9a). The direction is movable. When the drive motor 9i1 of the rotation drive unit 9i rotates, the turning power is transmitted to the slide shaft 9b via the gear mechanism 9i2, and the slide shaft 9b rotates about the axis X2. When the slide shaft 9b rotates about the axis X2, the eccentric member 9m1 attached to the front end of the slide shaft 9b rotates, and the eccentric pin 9m3 (axis X3) fixed to the eccentric member 9m1 is an eccentric bearing. While being pivotally supported by the portion 9m3, it turns around the axis X2 of the slide shaft 9b. As a result, as shown in FIG. 2, the front panel 2b has the axis line X1 of the slide shaft 9a parallel to the axis line X of the rotary drum 1 as a turning center (in a plane orthogonal to the axis line X1). And turn between a first position P1 indicated by 2 and a second position P2 indicated by a solid line.

  The first position P1 and the second position P2 of the front panel 2b shown in FIG. 2 correspond to the first position P1 'and the second position P2' of the spray nozzle unit 5 shown in FIG. The first position P1 ′ is the position of the spray nozzle unit 5 where the spray nozzle unit 5 is located on the inner diameter side of the diameter of the front end opening 1e of the rotary drum 1, in other words, the spray nozzle unit 5 is the front end of the rotary drum 1. This is the position of the spray nozzle unit 5 that can move in the axial direction without interfering with the opening 1e. The second position P2 ′ is such that at least the spray nozzle 5a of the spray nozzle unit 5 is on the outer diameter side with respect to the diameter of the front end opening 1e of the rotary drum 1 and the vertical plane V including the axis X of the rotary drum 1 This is the position of the spray nozzle unit 5 located on the front side in the rotational direction A of the rotary drum 1. At the second position P2 ', when the spray nozzle unit 5 moves in the axial direction, it interferes with the front end opening 1e of the rotary drum 1. The second position P2 'may be an installation position of the spray nozzle unit 5 at the time of processing the granular material, or may be a position above or below this set position. In the latter case, the spray nozzle unit 5 is moved from the second position P2 'to the set position by the vertical movement mechanism 8 or from the set position to the second position P2'. In the example shown in FIG. 12, the second position P2 'is an installation position of the spray nozzle unit 5 at the time of processing the granular material. In addition, FIG. 12 shows the installation position P2 ′ (solid line) of the spray nozzle unit 5 when the surface layer portion S1 of the granular material layer S is at a relatively high position (when the amount of processed granular material is large), The installation position P2 ′ (dotted line) of the spray nozzle unit 5 when the surface layer portion S1 of the granular material layer S is at a relatively low position (when the amount of processing of the granular material is small) is shown. Further, in this embodiment, at the second position P2 ′, the spray nozzle 5a of the spray nozzle unit 5 sprays the spray liquid vertically downward (so that the spray nozzle of the spray nozzle 5a faces vertically downward). The direction of the nozzle 5a is set. The spray position of the spray nozzle 5a can be adjusted in the vertical direction by the vertical movement mechanism 8.

  FIG. 13 shows an air supply part A1 provided on the front end opening 1e side of the rotary drum 1. In this embodiment, the air supply unit A1 is a process of hot air or cold air supplied via an air flow guide plate 20 as an air flow control unit disposed in the chamber 2a at the front end of the casing 2 and the air supply duct 21. And a passage member 24 for forming a passage portion 24a that guides the gas to the airflow guide plate 20. The airflow guide plate 20 includes a side portion 20a facing away from the front end opening 1e, and another side portion 20b bent in a direction approaching the front end opening 1e from the one side 20a, and the range of the front end opening 1e. Among these, it arrange | positions in the position corresponding to the area | region which becomes the rotation direction back side (right side in the same figure) with respect to the vertical surface V containing the axis line X of the rotating drum 1. FIG. Further, the airflow guide plate 20 is arranged in an inclined posture in a direction gradually approaching the vertical plane V from below to above. The passage member 24 is attached to the front end wall of the casing 2, and the front side is closed by the front panel 2b, thereby forming a passage portion 24a in the chamber 2a. The upper portion of the passage portion 24 a communicates with the air supply port 21 a of the air supply duct 21. The airflow guide plate 20 is fixed to the front side portion of the lower portion of the passage member 24 or is integrally formed. A cleaning nozzle 22 that ejects cleaning liquid is disposed inside the chamber 2a, and a cleaning nozzle 23 that ejects cleaning liquid is disposed inside the passage portion 24a. The processing gas supplied from the air supply port 21a of the air supply duct 21 is guided to the airflow guide plate 20 through the passage portion 24a, guided by the airflow guide plate 20 having the above-described form, and from the front end opening 1e. It flows into the inside of the rotating drum 1. Therefore, as shown in FIG. 12, the processing gas flowing into the rotary drum 1 is located above the powder layer S with respect to the installation position P2 ′ of the spray nozzle unit 5 when processing the powder, In addition, the flow is directed toward the space in the rotary drum 1 on the back side with respect to the spray nozzle unit 5.

  As shown in FIG. 1, an air supply part A2 provided on the side of the rear end opening 1g of the rotary drum 1 includes an internal space of a chamber member 30 having a connection port 30a with an air supply duct (not shown), and rotation. An airflow guide plate 32 is disposed in an air supply chamber 31 configured with an internal space of the extending portion 1f of the drum 1, and processing gas such as hot air and cold air supplied to the air supply chamber 31 through an air supply duct is supplied. The air guide plate 32 guides the air to the inside of the rotary drum 1 from the rear end opening 1g. The chamber member 30 is connected to the rear end portion of the extending portion 1f. In this embodiment, the airflow guide plate 32 is supported by one or a plurality of support members 32a, and is disposed in an inclined manner with a predetermined angle θ1 in the internal space of the extending portion 1f. Further, in this embodiment, the airflow guide plate 32 is formed of a semicircular plate member as shown in FIG. 14, and the arc portion 32a has the same diameter as the inner peripheral surface (the rear end opening portion 1g) of the extending portion 1f. (Or substantially the same diameter), the side portion 32b is disposed in a posture inclined by a predetermined angle θ2 with respect to the vertical surface V including the axis X of the rotary drum 1 so as to face the back side of the spray nozzle unit 5. Therefore, the processing gas supplied to the air supply chamber 31 through the air supply duct is guided by the airflow guide plate 32, so that the installation position P2 ′ of the spray nozzle unit 5 at the time of processing of the granular material is set. The air flows into the inside of the rotating drum 1 from the rear end opening 1g, directed above the powder layer S and toward the space in the rotating drum 1 on the back side with respect to the spray nozzle unit 5. A cleaning nozzle 33 for ejecting the cleaning liquid is provided through the airflow guide plate 32. A cleaning nozzle 34 that ejects cleaning liquid is disposed inside the chamber member 30.

  As shown in FIG. 10, when the granular material is processed, the rotary drum 1 rotates in the direction A in FIG. 10, so that the seal ring 13 and the partitioning portion 14 of the peripheral wall portion 1 a are slidable contact portions 10 a of the ventilation member 10. Slid in contact. In particular, the seal member 14b of the partition part 14 is movable in the inner and outer peripheral directions, receives the centrifugal force accompanying the rotation of the rotary drum 1, moves in the outer peripheral direction, and slides the ventilation member 10 with a force commensurate with the centrifugal force. Press contact with the contact portion 10a. The processing gas supplied into the rotary drum 1 from the air supply unit A1 on the front end side and the air supply unit A2 on the rear end side of the rotary drum 1 passes through the powder layer S, and the particle layer. After contributing to the drying of S, the air enters the ventilation space C1 through the ventilation portion (porous portion) of the peripheral wall portion 1a of the rotary drum 1, and is exhausted from the ventilation space C1 to the ventilation member 10 through the ventilation port 10b. .

  Since the sealing member 14b of the partition portion 14 is configured to seal the ventilation space C1 by being pressed against the sliding contact portion 10a of the ventilation member 10 by the centrifugal force accompanying the rotation of the rotary drum 1, the dimensions and attachment of the partition portion 14 The sealing member 14b is always subjected to a predetermined force (a force commensurate with the centrifugal force) without being affected by the error of the above, the dimensional change due to the wear of the sealing member 14b, the shaft center of the rotating drum 1 and the distortion of the casing. Is pressed against the sliding contact portion 10a. Therefore, the sealing performance with respect to the ventilation space C1 is stabilized, and the occurrence of exhaust leakage and short path is more effectively prevented. In addition, it is relatively easy to manage the dimensions and shapes of the parts constituting the partition section 14. Furthermore, there is no abnormal wear of the seal member 14b due to excessive pressure contact force, the occurrence of contamination is reduced, and the replacement frequency of the seal member 14b is also reduced. On the other hand, even when the seal member 14b is replaced, the replacement operation is relatively easy. Moreover, in this embodiment, by arranging the partition portions 14 on the respective top portions 1a2 and the respective side surfaces 1a1 of the polygonal peripheral wall portion 1a, the number of the top portions 1a2 of the peripheral wall portion 1a (the number of the side surfaces 1a1) is increased. Since a large number of ventilation spaces C1 are formed in the region of the vent 10b, the occurrence of a short exhaust path can be more effectively prevented.

  During the processing of the powder (when the rotary drum 1 is rotated), the surface layer portion S1 of the powder layer S is inclined upward toward the front side in the rotation direction A, and the spray liquid from the spray nozzle 5a While the sprayed particles of the surface layer part S1 flow from the position (spray zone) where the spray liquid is sprayed to the lower side of the slope (direction B shown in FIG. 10), Receive moderate drying (drying zone). By installing the spray nozzle unit 5 at the second position P2 ′ which is an upper position in the tilt direction with respect to the surface layer portion S1 of the granular material layer S, the surface layer portion S1 which has received the spray of the spray liquid from the spray nozzle 5a. The flow distance when the granular particles flow to the inclined lower side B becomes relatively large, and spreading and drying of the spray liquid are effectively performed. Furthermore, in this embodiment, since the spray nozzle 5a of the spray nozzle unit 5 sprays the spray liquid vertically downward toward the granular material layer S at the second position P2 ′, the spray liquid is sprayed from the spray nozzle 5a. The received granular material particles of the surface layer portion S1 are promoted to flow downwardly by the spraying pressure of the spray liquid. Further, since the spray nozzle unit 5 is installed at the second position P2 ′ which is the upper position in the tilt direction with respect to the surface layer portion S1 of the granular material layer S, the rotation of the rotary drum 1 causes the front side in the rotation direction. It is difficult for a part of the lifted granular particles to collide with the spray nozzle unit 5 and be ejected to the mouth ring portion 1d. Therefore, even if the inner peripheral surface 1d1 of the mouth ring portion 1d is formed in a conical surface that gradually increases in diameter toward the front, the powder particles pass through the mouth ring portion 1d and the front end opening portion 1e, and the outside of the rotating drum 1 Phenomenon that is excluded or does not occur easily.

  In the air supply part A1 on the front end side of the rotary drum 1, it is guided by the airflow guide plate 20, above the powder layer S and on the back side of the spray nozzle unit 5. The processing gas supplied to the inside of the rotary drum 1 in the direction of the space part has its flow velocity lowered in the space part, and then, as shown by a white arrow in FIG. Enters the granular material layer S, passes through the granular material layer S, and is exhausted from the vent 10 b of the ventilation member 10. That the processing gas is supplied to the space on the back side of the spray nozzle unit 5 and that the processing gas enters the granular material layer S from the drying zone inclined downward from the spray zone; The phenomenon that the spray pattern of the spray liquid sprayed from the spray nozzle 5a is disturbed by the air flow of the processing gas is more effectively prevented in combination with the effect of reducing the flow velocity of the processing gas in the space. The Further, since the flow of the processing gas does not rebound in the surface layer portion S1 of the granular material layer S due to the decrease in the flow velocity of the processing gas, the generation and scattering of dust due to the rebound of the air flow hardly occur. Furthermore, the granular particles in the surface layer portion S1 sprayed with the spray liquid from the spray nozzle 5a at the upper position (spray zone) in the inclination direction of the granular layer S flow to the drying zone on the lower side of the inclination, Since the spray liquid spreads on the surface to some extent and then comes into contact with the airflow of the processing gas, dust generation and scattering are less likely to occur. Further, as described above, since the mouth ring portion 1d of the rotating drum 1 does not have the extending portion of the discharge plate 70, the flow of the processing gas supplied from the air supply portion A1 to the inside of the rotating drum 1 is It is not disturbed by the extended part of the discharge plate extending to the mouth ring 1d.

  Further, in the air supply portion A2 on the rear end side of the rotary drum 1, guided by the air flow guide plate 32, from the rear end opening portion 1g, above the granular layer S and to the spray nozzle unit 5. The processing gas supplied to the inside of the rotary drum 1 so as to be directed to the space portion in the rotary drum 1 on the rear side is reduced in the flow rate in the space portion, and then the drying zone inclined downward from the spray zone. Enters the granular material layer S, passes through the granular material layer S and is exhausted. That the processing gas is supplied to the space on the back side of the spray nozzle unit 5 and that the processing gas enters the granular material layer S from the drying zone inclined downward from the spray zone; The phenomenon that the spray pattern of the spray liquid sprayed from the spray nozzle 5a is disturbed by the air flow of the processing gas is more effectively prevented in combination with the effect of reducing the flow velocity of the processing gas in the space. The Further, since the flow of the processing gas does not rebound in the surface layer portion S1 of the granular material layer S due to the decrease in the flow velocity of the processing gas, the generation and scattering of dust due to the rebound of the air flow hardly occur. Furthermore, the granular particles in the surface layer portion S1 sprayed with the spray liquid from the spray nozzle 5a at the upper position (spray zone) in the inclination direction of the granular layer S flow to the drying zone on the lower side of the inclination, Since the spray liquid spreads on the surface to some extent and then comes into contact with the airflow of the processing gas, dust generation and scattering are less likely to occur.

  As described above, the spray liquid such as the film material liquid sprayed from the spray nozzle 5 a of the spray nozzle unit 5 to the granular material layer S is mixed with each of the granular particles by the stirring and mixing action accompanying the rotation of the rotary drum 1. It is spread on the surface and dried by the process gas passing through the granular material layer S. Thereby, a coating film is formed on the surface of each granular material particle.

  When the processing of the powder particles is completed and the spray nozzle unit 5 is pulled out from the inside of the rotary drum 1, first, the drive motor 9i1 of the rotation drive unit 9i of the nozzle position adjusting mechanism 9B in the nozzle moving mechanism 9 ( 11) is operated to rotate the slide shaft 9b about the axis X2, and the eccentric pin 9m3 (axis X3) is pivoted about the axis X2, so that the front panel 2b is moved to the axis X1 of the slide shaft 9a. Is turned from the second position P2 indicated by the solid line in FIG. 2 to the first position P1 indicated by the alternate long and short dash line. As a result, the spray nozzle unit 5 attached to the front panel 2b pivots from the second position P2 ′ shown in FIG. 12 to the first position P1 ′ without interfering with the front end opening 1e of the rotary drum 1. The rotary drum 1 can move in the direction of the axis X. When the spray nozzle unit 5 is set to the second position P2 ′ indicated by the solid line in FIG. 12, the vertical movement mechanism 8 moves the spray nozzle unit 5 to the second position P2 ′ indicated by the dotted line. , Swivel. Thereafter, the axial movement mechanism 9A in the nozzle movement mechanism 9 is manually operated, or is operated by an appropriate axial driving means such as an air cylinder, so that the spray nozzle unit 5 is moved along with the front panel 2b. By moving in the direction of the axis X, the spray nozzle unit 5 can be pulled out of the rotary drum 1 from the front end opening 1e (see FIG. 1). At that time, the slide shafts 9a and 9b of the axial movement mechanism 9A are slid and guided by the slide bearing portions 9c and 9d and the slide rails 9e and 9f, so that the front panel 2b and the spray nozzle unit 5 are connected to the axis of the rotary drum 1. It can move smoothly in the X direction.

  On the other hand, when the spray nozzle unit 5 is inserted from the outside to the inside of the rotating drum 1, the front panel 2b is first positioned at the first position P1 indicated by the alternate long and short dash line in FIG. Then, the spray nozzle unit 5 is moved in the direction of the axis X of the rotary drum 1 together with the front panel 2b, and the spray nozzle unit 5 is inserted into the rotary drum 1 from the front end opening 1e. Thereafter, the drive motor 9i1 of the rotation drive unit 9i of the nozzle position adjusting mechanism 9B of the nozzle moving mechanism 9 is operated, and the front panel 2b is shown in a solid line in FIG. 2 with the axis X1 of the slide shaft 9a as the turning center. Turn to 2 position P2. As a result, the spray nozzle unit 5 attached to the front panel 2b pivots from the first position P1 'shown in FIG. 12 to the second position P2' and is set to the position at the time of processing the granular material. When the spray nozzle unit 5 is set to the second position P2 ′ indicated by the solid line in FIG. 12, the vertical position is moved by the vertical movement mechanism 8 from the second position P2 ′ indicated by the dotted line to the second position indicated by the solid line. Move to P2 ′.

  In the above embodiment, the inner peripheral surface 1d1 of the mouth ring portion 1d of the rotary drum 1 is formed as a conical surface that gradually increases in diameter toward the front, but the inner peripheral surface 1d1 of the mouth ring portion 1d is Any shape may be used as long as the diameter gradually increases toward the front, and for example, the shape may gradually increase in diameter toward the front with a curvature.

  In the above embodiment, the air supply unit A1 is provided on the front end side of the rotary drum 1 and the air supply unit A2 is provided on the rear end side. However, only the air supply unit A1 on the front end side may be provided. good. The air supply unit A1 may have the same configuration as the air supply unit A2, and conversely, the air supply unit A2 may have the same configuration as the air supply unit A1. Further, the air supply unit may supply the processing gas to the inside of the rotary drum 1 through the peripheral wall portion 1a of the rotary drum 1 (a ventilation portion formed of a porous portion).

  In the above embodiment, the nozzle moving mechanism 9 has a biaxial structure including two slide shafts 9a and 9b, but includes only one slide shaft corresponding to the slide shaft 9a. A uniaxial structure may be adopted. In this case, a slide bearing portion that slides and guides the single slide shaft, a rotation bearing portion that supports rotation around the axis of the slide shaft, and a rotation drive portion that rotates the slide shaft are provided. By rotating the slide shaft by the rotation drive unit, the front panel 2b is pivoted about the axis of the slide shaft as a pivot center.

  Further, in the above embodiment, the front end portion of the rotating drum 1 is configured by the mouth ring portion 1 and the front end opening portion 1 e is provided at the front end, but the rear end of the rotating drum 1 is the same as the mouth ring portion 1. A mouth ring portion may be used, and a rear end opening may be provided at the rear end. In this case, the discharge member (discharge plate) is configured to guide the powder particles inside thereof to the mouth ring portion at the rear end by the rotation of the rotary drum 1, and the powder particles guided to the mouth ring portion are It is guided to the inner peripheral surface of the mouth ring portion and discharged from the rear end opening to the outside of the rotating drum 1.

  Further, the present invention is not limited to a coating apparatus provided with a rotating drum having a polygonal cross-sectional shape of the peripheral wall portion, but a coating apparatus provided with a rotating drum having a circular, conical, or polygonal conical cross-sectional shape of the peripheral wall portion. The same applies to the above. Further, the present invention is not limited to a coating apparatus having a so-called jacketless structure, and is similarly applicable to a coating apparatus having a structure in which a jacket is mounted on the peripheral wall portion of the rotating drum. Further, the present invention is not limited to a coating apparatus in which the rotating drum is driven to rotate about an axis parallel or substantially parallel to the horizontal line, but can be similarly applied to a coating apparatus in which the rotating drum is driven to rotate about an axis inclined with respect to the horizontal line. is there.

DESCRIPTION OF SYMBOLS 1 Rotating drum 1a Circumferential wall part 1b End wall part 1c End wall part 1d Mouth ring part 1d1 Inner peripheral surface 1e Front end opening part 5 Spray nozzle unit 5a Spray nozzle 68 Upper baffle 69 Lower baffle 70 Discharge plate

Claims (5)

A ventilating rotary drum in which powder particles to be treated are housed and driven to rotate around an axis thereof, one end portion of which is an annular mouth ring portion, and one end of the mouth ring portion is In a coating apparatus comprising: a rotary drum provided with a side opening; and a discharge member provided inside the rotary drum for discharging powder particles inside the rotary drum to the outside of the rotary drum.
An inner peripheral surface of the mouth ring portion is formed in a shape that gradually increases in diameter toward one end side, and the discharge member guides powder particles inside the rotary drum to the mouth ring portion by rotation of the rotary drum. And the granular material guided to the said mouth ring part is guided to the internal peripheral surface of the said mouth ring part, and is discharged | emitted from the said one end side opening part to the exterior of the said rotating drum.   The coating apparatus according to claim 1, wherein one end of the discharge member extends to an axial position of the other end of the mouth ring portion.   The coating apparatus according to claim 1, further comprising an air supply unit configured to supply a processing gas to the inside of the rotating drum via the mouth ring unit.   Provided inside the rotating drum, and provided with a baffle that stirs the granular material inside the rotating drum by the rotation of the rotating drum, and the baffle is provided at a predetermined interval in the circumferential direction of the rotating drum, and the rotation The coating apparatus according to any one of claims 1 to 3, comprising a plurality of upper baffles and lower baffles having different heights from an inner surface of the drum.   One or a plurality of spray nozzles for spraying a spray liquid onto the granular material layer inside the rotating drum, the spray nozzle being on the outer diameter side than the diameter of the one end side opening, and on the rotating drum The coating apparatus according to any one of claims 1 to 4, wherein the spray liquid is sprayed at a position on the front side in the rotational direction with respect to a vertical plane including the axis.

Images