Solid material comminution or disintegration – Apparatus – Mutual attrition or compression comminutors
Patent
1994-04-15
1996-07-23
Eley, Timothy V.
Solid material comminution or disintegration
Apparatus
Mutual attrition or compression comminutors
118 19, 118418, 366 56, 3661753, 241172, B02C 1700, A23G 326, B01F 504
Patent
active
055381952
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a granulating and coating technique, and more particularly to a technique wherein powder and granules are contained in a drum rotating about a substantially horizontal axis and the rotary drum is rotated for granulation of the powder and granules and (or) coating thereof.
BACKGROUND ART
Techniques for granulating and coating are know including such as granulating and coating various powder and granules including medicines, foods, synthetic chemical products, etc. by supplying and discharging gas such as hot air blown into and from a rotary drum (coating pan) while rotating the rotary drum around a horizontal axis.
In the technique described above, there is raised a technical problem of how to agitate and mix the powder and granules efficiently in the rotary drum in order to accomplish a desired granulating or coating operation efficiently and homogeneously. To solve this problem, it has been proposed to provide a baffle device fixed in the rotary drum for functioning as an obstacle to the flow of the granules etc. (See Japanese Patent No. Sho 52-10665 Gazette).
For the baffle device, there is proposed a baffle device in which its position is movable along with an axis or between the inside and outside of the granular layer.
In the former prior art described above, however, there is seen a phenomenon that the raw material of the powder and granules tends to adhere to the baffle device when processing of granulation and coating is carried out, then the material adhered is peeled off therefrom into the rotary drum, because the baffle device is installed on a fixed position. In such phenomenon, the adhered material detaches from the baffle device, then it can be a cause of defects such as unevenness in the thickness of the coated layer, oversized products so-called double tablets and irregular-shaped products which are a result of the adhesion of the material peeled off to the granulated products.
The later prior art described above provides an improved agitating operation accomplished by using the baffle device, however, the inventors herein found that it cannot solve all of the problems as described above and has defects due to the adhesion of powder and granules to the baffle device and the inner wall of the rotary drum and their peeling off therefrom as well.
OBJECTS OF THE INVENTION
In view of the problems as described above, it is an object of the present invention to provide a granulating and coating technique capable of obtaining products of uniform granulating and coating.
It is an another object of the present invention to provide a technique capable of eliminating the adhesion of the raw material of the powder and granules to the baffle device and their peeling off therefrom, and the problems associated thereto.
It is a further object of the present invention to provide a technique for making excellent agitation of the powder and granules.
It is a still further object of the present invention to provide a technique capable of improving the efficiency in the production of the granules or coated products.
Aforementioned and other objects and the novel advantageous features of the present invention will be clarified in the description of this specification with reference referring to the drawings appended.
DISCLOSURE OF THE INVENTION
In the scope of the invention disclosed in the present patent application, the representative embodiment thereof can be outlined as follows.
The granulating and coating method of the present invention achieves granulation and coating by using an apparatus for granulating and coating wherein material of powder and granules are contained in a rotary drum installed in said apparatus for granulating and coating, said rotary drum is rotated about a substantially horizontal axis therein, while rotating a baffle device at the inside of the layer of the powder and granules contained in the rotary drum.
The baffle apparatus for granulating and coating of the present invention is one to be used for the granulating and
REFERENCES:
patent: 3874092 (1975-04-01), Huttlin
patent: 4129666 (1978-12-01), Wizerkanink
patent: 5050528 (1991-09-01), Yamada et al.
patent: 5397393 (1995-03-01), Tsujino et al.
Moro Shoichi
Nakazawa Shinzo
Ogawa Masanori
Yamada Shuri
Eley Timothy V.
Freund Industrial Company Limited
Tokyo Tanabe Company Limited
LandOfFree
Device for granulating and coating and baffle device for same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for granulating and coating and baffle device for same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for granulating and coating and baffle device for same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-707924