JP3359357B2 - Granulation coating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granulation coating apparatus, and more particularly to a granulation coating apparatus for coating tablets and the like in a horizontal rotating drum.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show an example of a known granulating coating apparatus (A) having a horizontal rotating drum.

In FIG. 1, (1) is a casing surrounding the entire apparatus, and (2) is a rotating drum rotatably supported in the casing (1) so that a rotating shaft is horizontal. is there.

The rotary drum (2) has a polygonal shape at the center,
For example, it is a nine-sided polygonal part (2a), and both sides are pyramidal parts (2b) narrowed down to a pyramid shape, one of which is an entrance and exit for product supply and discharge. On the other hand, a hollow shaft (3) communicating with the inside of the rotary drum (2) protrudes, and the hollow shaft (3) is rotatably supported by a bearing (4), thereby rotating the rotary drum (3). 2) is designed to rotate about the axis of the hollow shaft (3) as the center of rotation.

[0005] Each surface constituting the nine sides of the rotary drum (2) comprises a perforated plate (5) and a chamber (6) serving as an air passage disposed outside the perforated plate (5). I have.

When each of the chambers (6) comes down with the rotation of the rotary drum (2), an opening provided on the side of the chamber (6) is provided with an air supply provided in the casing (1). Passage (7)
When each of the chambers (6) comes upward along with the rotation of the rotary drum (2), an opening provided on the side of the chamber (6) opens the exhaust provided in the casing (1). It communicates with the passage (8).

(9) A rotary drum (2) through a hollow shaft (3)
This is the spray gun inserted inside
The coating liquid is sprayed from (9) toward the object to be coated which is put into the rotary drum (2).

In the above configuration, for example, when coating the surface of the tablet (C), the tablet (C) is put into the rotating drum (2), the rotating drum (2) is rotated, and Dry air is supplied from the air passage (7) through the chamber (6) located below the rotary drum (2) and the perforated plate (5) into the object to be coated (C), and passes through the object to be coated (C). The dry air supplied to the rotating drum (2) is supplied from the perforated plate (5), which is
Exhaust passage leading to (6) and communicating with this chamber (6)
Exhaust to the outside via (8).

When the tablet (C) is stirred in the rotary drum (2) by the rotation of the rotary drum (2) and a flow of dry air is formed in the rotary drum (2), the spray gun (9) The coating liquid from the tablet in the rotating drum (2)
Spray toward (C).

[0010] Then, the coating liquid is sprayed around the tablet (C), so that a coating layer is formed on the surface of the tablet (C) and the coating layer is dried by the dry air flowing in the rotating drum (2). Then, the coating operation is completed.

[0011]

As described above, at the time of coating the surface of the tablet (C) placed in the rotating drum (2),
Simply rotating the multi-sided rotary drum (2) could not sufficiently agitate the tablet (C) in the rotary drum (2).

That is, in the stirring by rotation of the rotary drum (2), as shown in FIGS. 8 and 9, the tablet (C) located below the rotary drum (2) is moved in the direction of the arrow L of the rotary drum (2). It moves upward with the rotation to, and when it moves to a certain height, it repeats the operation of falling down by its own weight, and the tablet (C) is stirred by this repetition, so the stirring operation has regularity There was a problem that the tablet (C) could not be sufficiently agitated by one pattern, that is, only by agitation in the rotation direction, without the agitation action in the rotation axis direction.

Therefore, there was a problem that the coating liquid could not be sprayed uniformly on the surface of the tablet (C), and that coating unevenness occurred.

Further, a baffle plate is attached to the inner peripheral surface of the perforated plate (5) constituting the polygonal portion (2a) of the rotary drum (2) to promote a stirring operation when the rotary drum (2) rotates. In this case, too, the stirring of the tablet (C) located on the inner peripheral surface of the perforated plate (5) is only promoted,
Since the tablet (C) located in the pyramidal portions (2b) at both ends of (2) cannot be sufficiently agitated, even in this case, coating unevenness could not be completely prevented.

[0015]

[MEANS FOR SOLVING THE PROBLEMS] To solve the above technical problems.
The invention according to claim 1 is provided so that the rotation axis is horizontal and rotatably supported, the cross section is a polygon, the both ends are pyramids, and the center is a polygon. Perforated plate
Is provided, the first baffle plate attached to stir in the rotation axis direction of the material to be coated on the porous plate, in the granulating and coating apparatus comprising a rotary drum that rotates by receiving a material to be coated on the inside The rotating drum above
The shaft is rotatably installed on the perforated plate of
Fix the first baffle plate to the shaft, from outside
Rotate the shaft to tilt the first baffle plate
It is characterized by being able to change the angle
is there. In this case, the object to be coated in the rotating drum is
In the upper layer, the object to be coated in the upper layer
It is preferable to arrange a second baffle plate for stirring
(Claim 2).

Further , in order to solve the above technical problems,
In the invention according to claim 3, the rotation axis is horizontal.
It is rotatably supported, has a polygonal cross section,
Has a pyramid shape, and a perforated plate is
Then, the object to be coated is stirred on the perforated plate in the direction of the rotation axis.
The first baffle plate is attached and
With a rotating drum that stores and rotates
In the grain coating equipment, the perforated plate of the above rotating drum
The shaft is installed upright so that it can rotate from outside,
A first baffle plate is provided at the bottom and
The second to stir the object to be coated in the upper layer in the rotation axis direction
Baffle plate and rotate the shaft from outside
And simultaneously adjust the inclination angles of the first and second baffle plates.
It can be changed to
You. In each of the above means, the rotating drum
The object to be coated in the pyramidal portions at both ends is
Baffle press to return the air to the center of the rotating drum
It is preferable to provide a sheet (claim 4) .

[0017]

As described above, three kinds of baffle plates for stirring the object to be coated are appropriately selected and arranged in the rotating drum, and the first baffle plate or the first and second baffle plates are arranged.
A configuration in which the inclination angle of the second baffle plate can be changed;
By stirring of the material to be coated in a rotary drum it is efficiently performed.

[0018]

1 and 2 are a side view and a front view showing a granulation coating apparatus (B) according to the present invention, and FIG. 3 is a development view of a rotary drum described later.

In FIG. 1, (21) is a casing surrounding the entire apparatus, and (22) is a rotary drum rotatably supported in the casing (21) so that the rotation axis is horizontal. is there.

This rotary drum (22) has a polygonal shape at the center,
For example, it is a polygonal part (22a) having a nine-sided shape, and both sides are pyramidal parts (22b) narrowed down to a pyramid shape, one of which is an entrance and an exit for product supply and discharge. Has become
On the other hand, a hollow shaft (23) communicating with the inside of the rotary drum (22) protrudes, and the hollow shaft (23) is rotatably supported by a bearing (24) so that the rotary drum (22) is hollow. The shaft (23) is configured to rotate around the axis of rotation.

Each surface constituting the nine sides of the rotary drum (22) includes a perforated plate (25) and a chamber (26) serving as an air passage disposed outside the perforated plate (25). I have.

When each of the chambers (26) comes down with the rotation of the rotary drum (22), an opening provided on the side of the chamber (26) is provided with an air supply provided in the casing (21). aisle
(27), and when each of the chambers (26) comes upward with the rotation of the rotary drum (22), an opening provided on the side of the chamber (26) is inserted into the casing (21). Exhaust passage provided
It communicates with (28).

(29) is a rotary drum (2) through a hollow shaft (23).
2) The spray gun inserted in
The coating liquid is sprayed from (29) toward the object to be coated which is charged into the rotary drum (22).

(30) As shown in FIG.
This is a first baffle plate attached to the inner peripheral surface side of a perforated plate (25) constituting the polygonal portion (22a) of (22).

The first baffle plate (30) is shown in FIG.
As shown in the figure, it is fixed to the tip of a shaft (40) that penetrates the perforated plate (25) and is rotatably supported with respect to the perforated plate (25), and has a rear end of the shaft (40). Is the chamber
A handle (41) for rotating the baffle plate is attached to the rear end of the protrusion (26).

Then, by operating the handle (41), the first
Rotate the baffle plate (30)
When the rotary drum (22) rotates, the perforated plate (2) is tilted by tilting the
The object to be coated, which is located near the inner peripheral surface of 5), is moved in the axial direction of the rotating drum.

(33) is a rotary drum (2) through a hollow shaft (23).
A support rod inserted in 2), and a second baffle plate (31) is fixed to the tip of the support rod (33).

The second baffle plate (31)
Like the baffle plate (30), the rotating drum (22) is supported so as to be inclined at a predetermined angle with respect to the axial direction of the rotating drum (22). It is set at a position where it comes into contact with the upper layer of the object.

When the rotating drum (22) is rotated, the coating object located in the upper layer of the coating objects located in the rotating drum (22) is moved in the axial direction of the rotating drum (22). It is.

(32) is a pyramid-shaped portion (22b) of the rotating drum (22).
The third baffle plate (32) is attached to the pyramid-shaped portion (2) as shown in FIG.
It is attached so as to be inclined by a predetermined angle with respect to the radiation direction connecting the center and the outer periphery of 2b).

When the rotary drum (22) rotates, the object to be coated located on the pyramid-shaped portion (22b) is removed from the rotary drum (22).
It is made to return to the central part of.

In the above configuration, for example, when coating the surface of the tablet (C), the tablet (C) is put into the rotating drum (22), and the rotating drum (22) is rotated.
Dry air is supplied from the air supply passage (27) to the rotary drum (22) through the chamber (26) located below the rotary drum (22) and the perforated plate (25), and is supplied into the rotary drum (22). The dried air is guided to an exhaust passage (28) through a perforated plate (25) and a chamber (26) located above the rotating drum (22) and exhausted to the outside.

When the tablet (C) is stirred in the rotating drum (22) by the rotation of the rotating drum (22) and a flow of dry air is formed in the rotating drum (22), the spray gun From (29), the coating liquid is sprayed toward the tablets (C) in the rotating drum (22).

At this time, the first baffle plate (30) is located on the perforated plate (25) forming the polygonal portion (22a) of the rotating drum (22), A second baffle plate (31) is located in the upper layer of the tablet (C).
Since the third baffle plate (32) is located on the pyramidal portion (22b), the tablet (C) located near the inner peripheral surface of the perforated plate (25) of the tablet (C) is The stirring is promoted by (30), and the stirring of the tablet (C) located in the upper layer is promoted by the second baffle plate (31).
The tablet (C) located in 2b) is promoted to be stirred by the third baffle plate (32), so that the tablet (C) is placed on the rotating drum (2).
Stir evenly in 2).

That is, a tablet located near the perforated plate (25)
(C), as shown in FIG. 3, with the rotation of the rotating drum (22) in the direction of the arrow L, the first baffle plate (30) pushes in the direction of the arrow M or the direction of the arrow N by the action of the first baffle plate (30). And
The tablet (C) that moves to the right or left in the axial direction of the rotating drum (22) and is located in the upper layer is pushed in the axial direction of the rotating drum (22) by the action of the second baffle plate (31). Further, the tablet (C) located in the pyramid-shaped portion (22b) has a third shape.
By the action of the baffle plate (32), the rotating drum (22)
Will be returned to the central part.

Therefore, the tablet (C) is made of a conventional rotary drum (22).
In addition to the agitation by the rotation of the tablet, the tablet (C) is agitated by the action of the first to third baffle plates (30), (31), (32). )
The tablet (C) will be agitated evenly in the rotating drum (22) because of the very complicated movement in the inside.

For this reason, the coating liquid from the spray gun (29) is applied to all the tablets charged in the rotary drum (22).
(C) is evenly applied and the rotating drum (22)
The coating layer is dried by the drying air flowing inside, and the coating operation is completed.

As described above, the second baffle plate (31) is supported by using a support rod (33) inserted into the rotary drum (22) from the rotary shaft (23) as shown in FIG. The shaft (45) is extended from the first baffle plate (30) toward the inside of the rotating drum (22) as shown in FIG.
The second baffle plate (31) may be supported at the end of the second baffle plate (31).

In this case, the second baffle plate (31)
The second baffle plate (31) should be attached to each perforated plate (25) at least one because each of the second baffle plates (31) rotates together with the rotation of the rotary drum (22).

In addition, the first baffle plate (3
Extend the shaft (40) supporting the (0), and
By supporting the second baffle plate (31) at the tip of (40), the inclination angles of the first baffle plate (30) and the second baffle plate (31) with respect to the rotating drum (22) can be adjusted simultaneously. You may do so.

Further, the first baffle plate (30) and the second baffle plate supported by the shaft (40)
If it is troublesome to adjust the angle of (31) one by one, the handle (41) corresponding to each shaft (40) can be connected by a link machine, and the first baffle plate (30) and the 2
The angle of the baffle plate (31) can be changed to 1 degree.

Further, the above description is based on the assumption that the rotating drum (22)
An example in which three types of first to third baffle plates (30), (31), and (32) are simultaneously arranged has been described.
In the above, only one of the above three types of baffle plates may be arranged, or two of the three types may be combined.

[0043]

As described in the foregoing, granulating and coating apparatus according to the present invention, the first baffle plate is disposed in the porous plate constituting each surface of the polygon of the rotary drum, the
A configuration in which the inclination angle of the first baffle plate can be changed;
The agitation state according to the type of object to be coated.
It can be adjusted to make it good, and in promoting the stirring action
This is advantageous. In this case, the core to be thrown into the rotating drum
A second baffle at a position where it contacts the upper part of the coating
If you place the plate, the object to be coated will be a rotating drum
Complex movements within the
A stirring action could be performed .

Further, a granulation coating apparatus according to the present invention
Is not only the first baffle plate but also the second baffle plate.
The inclination angle of the baffle plate can be changed.
And more suitable for the type of object to be coated.
The sharp stirring state can be adjusted, further improving the stirring action.
It becomes possible.

Further, the pyramidal portions at both ends of the rotary drum are
Third, the coating material is returned to the center of the rotating drum.
If you install a baffle plate of
Coating liquid can be sprayed more uniformly
To form a uniform coating layer on each workpiece
This is extremely advantageous in performing

[Brief description of the drawings]

FIG. 1 is a schematic view of a main part of a granulation coating apparatus according to the present invention as viewed from a side.

FIG. 2 is a schematic view of a main part of the granulation coating apparatus according to the present invention as viewed from the front.

FIG. 3 is a development view of a rotary drum.

FIG. 4 is an essential part cross-sectional view showing another embodiment of the first baffle plate according to the present invention.

FIG. 5 is a main part schematic diagram showing another embodiment of the second baffle plate according to the present invention.

FIG. 6 is a schematic view of a main part of a conventional granulation coating apparatus viewed from the side.

FIG. 7 is a schematic view showing a main part of a conventional granulation coating apparatus viewed from the front.

FIG. 8 is an explanatory view showing a stirring state by a conventional granulation coating apparatus.

FIG. 9 is an explanatory view showing a stirring state by a conventional granulation coating apparatus.

[Explanation of symbols]

 B Granulation coating apparatus C Tablet 22 Rotary drum 22a Polygonal part 22b Pyramidal part 25 Perforated plate 26 Chamber 30 First baffle plate 31 Second baffle plate 32 Third baffle plate 40 Shaft 45 Shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-133838 (JP, A) JP-A-2-56232 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01J 2/00 B01J 2/12 B01F 9/02-9/08

Claims (4)

(57) [Claims] 1. A rotating shaft is horizontally supported so as to be rotatable, has a polygonal cross section, and has a pyramid shape at both ends.
A perforated plate is provided in the central polygonal portion, a first baffle plate for stirring the object to be coated in the direction of the rotation axis is attached to the perforated plate, and a rotating drum that stores and rotates the object to be coated therein In a granulation coating apparatus comprising: a shaft is rotatably mounted on the perforated plate of the rotary drum from the outside so as to be rotatable from outside, a first baffle plate is fixed to the shaft, and the shaft is rotated from outside. Wherein the inclination angle of the first baffle plate can be changed. To wherein the upper portion of the material to be coated in the rotary drum, according to claim 1, characterized in that a second baffle plate for stirring the material to be coated in the upper portion in the rotational axis direction Granulation coating equipment. 3. A rotatable support in which the rotation axis is horizontal, the section is a polygon, and both ends form a pyramid.
A perforated plate is provided in the central polygonal portion, a first baffle plate for stirring the object to be coated in the direction of the rotation axis is attached to the perforated plate, and a rotating drum that stores and rotates the object to be coated therein A shaft is rotatably provided from the outside on a perforated plate of the rotary drum, a first baffle plate is provided at a lower portion of the shaft, and an upper layer portion is coated at an upper portion. A second baffle plate for agitating the object in the direction of the rotation axis, wherein the shaft can be rotated from the outside so that the inclination angles of the first and second baffle plates can be changed simultaneously. Grain coating equipment. 4. A pyramidal part at both ends of said rotary drum, and a third baffle plate for circulating an object to be coated in said pyramidal part to a central part of said rotary drum is provided . 4. The granulation coating apparatus according to 2 or 3 .