JPH0663377A - Granulating and coating device - Google Patents

Abstract

PURPOSE:To uniformly agitate a material to be coated in a rotary drum by arranging three kinds of baffle plates in the drum to agitate the material. CONSTITUTION:A rotary drum 22 is freely rotatably supported so that the rotating shaft may be horizontal, the drum has a polygonal central part 22a and a pyramidal part 22b on both sides, and a material to be coated is placed in the drum. In this granulating and coating device B, a first baffle plate 30 is provided to the perforated plate 25 constituting each face of the polygonal part 22a of the drum 22 to agitate the material in the drum in the direction of the rotating shaft, and a second baffle plate 31 is arranged at a position in contact with the upper layer part of the material charged into the drum 22 to agitate the material at the upper layer part in the direction of the rotating shaft. A third baffle plate 32 is arranged on the pyramidal part 22b to return the material to the central part of the drum 22.

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 rotary drum.

[0002]

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

In FIG. 1, (1) is a casing that surrounds the entire apparatus, and (2) is a rotating drum that is rotatably supported in the casing (1) such that its rotation axis is horizontal. is there.

The rotating drum (2) has a polygonal central portion,
For example, it is a polygonal part (2a) with a 9-sided shape, and both sides are pyramidal parts (2b) that are squeezed into a pyramid shape, and one of them is an entrance for supplying and discharging products. On the other hand, a hollow shaft (3) communicating with the inside of the rotary drum (2) is projected, and the hollow drum (3) is rotatably supported by a bearing (4), so that the rotary drum (3 2) is designed to rotate about the axis of the hollow shaft (3).

Further, each surface constituting the nine sides of the rotary drum (2) is composed of a perforated plate (5) and a chamber (6) arranged outside the perforated plate (5) and serving as an air passage. There is.

Then, when each chamber (6) comes down with the rotation of the rotary drum (2), the opening provided at the side of the chamber (6) is supplied to the inside of the casing (1). Aisle (7)
When the chambers (6) are in communication with each other and the chambers (6) move upward as the rotary drum (2) rotates, the openings provided on the sides of the chambers (6) are exhausted inside the casing (1). It is designed to communicate with the passageway (8).

(9) is a rotating drum (2) through a hollow shaft (3)
It is a spray gun inserted inside, this spray gun
The coating liquid is sprayed from (9) onto the object to be coated which is put into the rotary drum (2).

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

When the tablet (C) is agitated 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 Coat the coating liquid from (9) tablets in the rotating drum (2)
Spray toward (C).

Then, since the coating liquid is sprayed around the tablet (C), 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 rotary drum (2). Then, the coating work is completed.

[0011]

As described above, at the time of coating the tablet (C) surface charged in the rotary drum (2),
The tablet (C) could not be sufficiently stirred in the rotary drum (2) simply by rotating the polygonal rotary drum (2).

That is, in the stirring by rotating 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 arrow L of the rotary drum (2). When the tablet (C) is agitated by repeating this movement, it moves upward with the rotation to, and when it moves to a certain height, it falls downward due to its own weight. There was a problem that the tablet (C) could not be sufficiently stirred by only one pattern, that is, the stirring in the rotating direction, without the stirring action in the rotating shaft direction.

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

Further, a baffle plate is attached to the inner peripheral surface of the perforated plate (5) constituting the polygonal portion (2a) of the rotating drum (2) to promote the stirring operation during the rotation of the rotating drum (2). In this case as well, the stirring of the tablets (C) located on the inner peripheral surface of the perforated plate (5) is only promoted, and the rotating drum
Since the tablets (C) located in the pyramidal portions (2b) at both ends of (2) could not be sufficiently stirred, coating unevenness could not be completely prevented in this case as well.

[0015]

[Means for Solving the Problems] A rotary shaft is rotatably supported with its horizontal axis, its cross section is a polygon, both ends are pyramidal, and a perforated plate is provided in the central polygon. A granulation coating apparatus comprising a rotary drum provided with a first baffle plate for stirring an object to be coated in a rotation axis direction on the perforated plate, and including a rotating drum for storing the object to be coated therein and rotating the same.

A first baffle plate for stirring the object to be coated in the direction of the rotation axis is attached to each porous plate in the central portion of the rotating drum, and at a position where it contacts the upper layer portion of the object to be introduced into the rotating drum. A second baffle plate that stirs the material to be coated in the upper layer in the rotation axis direction is arranged, and a third baffle plate that recirculates the material to be coated to the central portion of the rotating drum is attached to the pyramidal portions at both ends of the rotating drum. Moreover, the inclination angle of the first baffle plate can be changed.

[0017]

As described above, the three kinds of baffle plates for stirring the object to be coated are arranged in the rotary drum, so that the object to be coated can be surely stirred in the rotary drum.

[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 the figure, (21) is a casing that surrounds the entire apparatus, and (22) is a rotary drum that is rotatably supported in the casing (21) such that the rotary shaft is horizontal. is there.

The rotating drum (22) has a polygonal central portion,
For example, it is a polygonal part (22a) with a 9-sided shape, and both sides are pyramidal parts (22b) that are narrowed into a pyramid shape, and one of them is the entrance for product supply and discharge. Has become
On the other hand, a hollow shaft (23) that communicates with the inside of the rotary drum (22) is projected.By supporting this hollow shaft (23) rotatably by a bearing (24), the rotary drum (22) is hollow. It is designed to rotate around the axis of the shaft (23).

Each surface constituting the nine sides of the rotary drum (22) is composed of a perforated plate (25) and a chamber (26) which is an air passage arranged outside the perforated plate (25). There is.

When the chambers (26) are moved downward as the rotary drum (22) rotates, the openings provided at the sides of the chambers (26) are supplied to the inside of the casing (21). aisle
When each chamber (26) communicates with (27) and is rotated upward by the rotation of the rotary drum (22), the opening provided on the side of the chamber (26) is located inside the casing (21). Exhaust passage provided
It communicates with (28).

(29) is a rotating drum (2
2) It is a spray gun inserted in this
The coating liquid is sprayed from (29) onto the object to be coated which is put into the rotary drum (22).

(30) is the rotary drum as shown in FIG.
It is a first baffle plate attached to the inner peripheral surface side of a perforated plate (25) that constitutes the polygonal portion (22a) of (22).

The first baffle plate (30) is shown in FIG.
As shown in Fig. 5, the porous plate (25) is fixed to the tip of a shaft (40) that is rotatably supported by the porous plate (25) and the rear end of the shaft (40). Is the chamber
A handle (41) for rotating the baffle plate is attached to the rear end portion of the protrusion (26).

Then, by operating this handle (41), the first
Rotate the baffle plate (30) of the
By tilting (30) at a desired angle with respect to the axial direction of the rotary drum (22), the perforated plate (2
The object to be coated located near the inner peripheral surface of 5) is moved in the axial direction of the rotary drum.

(33) is a rotary drum (2
It is a support rod inserted in 2), and a second baffle plate (31) is fixed to the tip of this support rod (33).

This second baffle plate (31) has a first
Like the baffle plate (30), the baffle plate (30) is supported so as to be inclined at a predetermined angle with respect to the axial direction of the rotating drum (22), and its mounting position is the position to be coated into the rotating drum (22). It is set at a position where it contacts the upper layer of the object.

Then, when the rotary drum (22) is rotated, among the objects to be coated in the rotary drum (22), the objects to be coated in the upper layer are moved in the axial direction of the rotary drum (22). I am doing it.

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

When the rotary drum (22) is rotated, the object to be coated located on the pyramidal portion (22b) is moved to the rotary drum (22).
It is made to flow back to the central part of the.

In the above structure, for example, when coating the surface of the tablet (C), the tablet (C) is put into the rotary drum (22) and the rotary drum (22) is rotated,
Dry air is supplied into the rotary drum (22) from the air supply passage (27) 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 introduced into the exhaust passage (28) through the perforated plate (25) and the chamber (26) currently located above the rotary drum (22) and exhausted to the outside.

When the tablet (C) is agitated in the rotary drum (22) by the rotation of the rotary drum (22) and a flow of dry air is formed in the rotary drum (22), the spray gun is formed. The coating liquid is sprayed from (29) onto the tablets (C) in the rotary drum (22).

Then, at this time, the first baffle plate (30) is positioned in the perforated plate (25) forming the polygonal portion (22a) of the rotary drum (22), and the inside of the rotary drum (22) is The second baffle plate (31) is located on the upper layer of the tablet (C) of
Since the third baffle plate (32) is located in the pyramidal portion (22b), the tablet (C) located in the vicinity of the inner peripheral surface of the perforated plate (25) of the tablet (C) is the first baffle plate. Agitation is promoted by (30), and the tablets (C) located in the upper layer are agitated by the second baffle plate (31) to promote pyramidal (2).
The tablet (C) located in 2b) is agitated by the third baffle plate (32), so that the tablet (C) is rotated (2).
Stir evenly in 2).

That is, tablets located near the perforated plate (25)
(C) is pushed in the arrow M direction or the arrow N direction by the action of the first baffle plate (30) as shown in FIG. 3 as the rotary drum (22) rotates in the arrow L direction. Is
The tablet (C) that moves to the right or left in the axial direction of the rotary drum (22) and is located in the upper layer is pushed in the axial direction of the rotary drum (22) by the action of the second baffle plate (31). , And the tablet (C) located in the pyramidal part (22b) is the third
By the action of the baffle plate (32) of the rotating drum (22)
Will be returned to the central part of.

Therefore, the tablet (C) is a conventional rotary drum (22).
In addition to the agitation by the rotating operation of the tablet b, the tablets are stirred by the action of the first to third baffle plates (30), (31) and (32). )
The tablet (C) will be agitated uniformly in the rotating drum (22).

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

The second baffle plate (31) is supported by the method shown in FIG. 5 except that the support rod (33) inserted from the rotary shaft (23) into the rotary drum (22) is used as described above. As shown in, the shaft (45) is extended from the first baffle plate (30) toward the inside of the rotary drum (22), and the shaft (45) is extended.
The second baffle plate (31) may be supported at the tip of the.

In this case, the second baffle plate (31)
Since the rotary drum (22) also rotates with the rotation of the rotary drum (22), at least one second baffle plate (31) is attached to each porous plate (25).

The first baffle plate (3
Extend the shaft (40) supporting (0)
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 rotary drum (22) can be adjusted simultaneously. You may leave it like this.

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

Further, the above description is based on the following description in the rotating drum (22).
The example in which three kinds of the first to third baffle plates (30), (31) and (32) are arranged at the same time has been described, but the rotating drum (22)
It is possible to arrange any one of the above three types of baffle plates or a combination of two types of the three types.

[0043]

As described above, in the granulation coating apparatus according to the present invention, the first baffle plate is arranged on the perforated plate forming each side of the polygonal part of the rotary drum, and the inside of the rotary drum is arranged. Since the second baffle plate is arranged at a position where it comes into contact with the upper layer portion of the object to be coated and the third baffle plate is arranged in the pyramidal portion, the object to be coated is rotated by the rotating drum. At the time of stirring, due to the action of the above-mentioned three kinds of baffle plates, the object to be coated makes a very complicated movement in the rotating drum, and as a result, it is uniformly stirred.

Therefore, if the coating liquid is sprayed toward the object to be coated in this state, the coating liquid is evenly applied to the object to be coated, so that a good coating layer can be formed.

Further, according to the present invention, since the inclination angle of the first baffle plate or the first and second baffle plates with respect to the axial direction of the rotary drum can be changed, the object to be charged into the rotary drum can be changed. By changing the angle of the baffle plate according to the coating object, it becomes possible to form the optimum stirring state for various objects to be coated in the rotary drum.

[Brief description of drawings]

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

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

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

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

FIG. 5 is a schematic view of a main part 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 as viewed from the side.

FIG. 7 is a schematic external view of a main part of a conventional granulation coating apparatus as 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 device C Tablet 22 Rotating 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

Claims (4)

[Claims] 1. A rotatably supported shaft having a horizontal rotation axis, the cross section of which is polygonal, and both ends of which are pyramidal.
A rotary drum provided with a perforated plate in the central polygonal part, and a first baffle plate for stirring the object to be coated in the rotation axis direction is attached to the porous plate, and a rotating drum for accommodating the object to be rotated and rotating the drum is provided. In a granulation coating apparatus provided, a shaft is erected on the perforated plate of the rotary drum so as to be rotatable from the outside, a first baffle plate is fixedly mounted on the shaft, and the shaft is rotated from the outside. A granulation coating apparatus characterized in that the inclination angle of the first baffle plate can be changed. 2. A rotary shaft is rotatably supported such that the rotary shaft is horizontal, the cross section is polygonal, and both ends are pyramidal.
A rotary drum provided with a perforated plate in the central polygonal part, and a first baffle plate for stirring the object to be coated in the rotation axis direction is attached to the porous plate, and a rotating drum for accommodating the object to be rotated and rotating the drum is provided. In a granulation coating apparatus provided, a second baffle plate for agitating the material to be coated in the upper layer in the rotation axis direction is arranged in the upper layer of the material to be coated in the rotary drum. Coating equipment. 3. A rotatably supported shaft having a horizontal rotation axis, the cross section of which is polygonal, and both ends of which are pyramidal.
A rotary drum provided with a perforated plate in the central polygonal part, and a first baffle plate for stirring the object to be coated in the rotation axis direction is attached to the porous plate, and a rotating drum for accommodating the object to be rotated and rotating the drum is provided. In a granulating coating apparatus provided, a shaft is rotatably erected 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 to be coated is provided at an upper portion. Granulation characterized in that a second baffle plate for stirring in the direction of the rotation axis is provided, and the shaft can be externally rotated to change the inclination angles of the first and second baffle plates at the same time. Coating equipment. 4. A rotatably supported shaft having a horizontal rotation axis, the cross section of which is polygonal, and both ends of which are pyramidal.
A rotary drum provided with a perforated plate in the central polygonal part, and a first baffle plate for stirring the object to be coated in the rotation axis direction is attached to the porous plate, and a rotating drum for accommodating the object to be rotated and rotating the drum is provided. In a granulation coating apparatus provided, in the pyramidal portion at both ends of the rotary drum, the material to be coated in the pyramidal portion is returned to the central portion of the rotary drum.
The granulation coating apparatus, which is provided with the baffle plate.