DK141273B - Apparatus for coating pellets, pellets, granules and other granular material. - Google Patents

Description

(11) PRESENTATION 1 273 DENMARK *> *** '* Il J |' '§ (21) Application No 1 896/78 (22) Filed on 2 May 1978 (23) Race day 2 May 1978 (44) The application presented and o the petition published on 1 O · f eb · 1 980

Dl THE REPORT OF THE PATENT AND TRADE MARKET W Priority requested from (71) P. MANNERING, GI. Slotsvej 14, Strib, 5500 Middelfart, DK.

(72) Inventor: Same.

(74) Plenipotentiary in the proceedings:

Patent law firm Magnus Jensens Eftf.

(54) Apparatus for coating pellets, pellets, granules and other cereals * = shaped material.

The invention relates to an apparatus for coating pellets, pellets, granules and other granular material and with a container in which the pellets are lifted by rotating or otherwise moving fins and in a certain lifting position fall from these fins and receive a coating at their fall. using a spraying mechanism.

Normally, an inclined rotating drum is used with inlet at the upper end and outlet at the lower end and with a spraying mechanism at the upper end cover.

2 141273

Known appliances of this kind have the disadvantage that the spraying mechanism works without certainty whether the coating liquid is hitting falling pills or just the bottom pills.

SUMMARY OF THE INVENTION The object of the invention is to provide an apparatus of the aforementioned kind which alleviates said disadvantage, and this apparatus is characterized by a contact closing arrangement between a point on a movable fin and a stationary point on the container for activating the spray mechanism in said particular lifting position for that fin.

The existence of a lifting position controls the spraying process, which also ensures independence of varying circulation numbers on the container.

The principle of the contact closure arrangement may be based on sensation or non-contact finding that the relevant position of a fin has been obtained.

The contact closing arrangement can form a pulse for a time relay which, through an adjustable time delay, can partly regulate the amount of the substances supplied and partly determine the time of the supply. The control of the time of the spraying is important, in this way it is possible to prevent contamination of the parts of the drum surface of 360 ° which is not covered by the material contained in the container.

The invention will be explained in more detail in connection with the drawing, which shows as an example an embodiment of the apparatus according to the invention.

The apparatus shown in the drawing comprises a container C in which is mounted a rotating drum D with a number of inwardly directed fins F, which are intended for carrying the pills P or other granular material lying on the bottom of the container. The granular material may optionally be a granulate which, after coating, is further processed into, for example, pellets or pellets.

The apparatus further comprises a spraying mechanism S with the necessary supply means, valves and drive mechanisms. · On the container C is the stationary part of a contact closing arrangement K, the movable part of which is on each of the fins F.

When a fin F has reached the lifting position where the pellets P fall off, the contact closing arrangement K - optionally with a desired delay - triggers the spray mechanism S such that the pellets P are covered during their fall through the atomized jet towards the bottom of the drum D.

The spray material may e.g. be fatty oil or molasses when it comes to giving feed pellets a coating.

Through the present invention, it is possible to synchronize the spray in small doses to avoid the build-up of grease and dust. It is also possible to regulate e.g. the amount of fat injected in relation to the amount of pellet flowing at all times.

The synchronization is most easily achieved by using contactless sensors activated either by the fins F or other protruding points on the rotating parts.

Also, mechanical signal sensors and switches are considered.

Different fall conditions for the pellets or the granular material may require a shift from the start of the spraying time. This can be achieved by correspondingly moving the stationary portion of the contact closure arrangement K onto the container C.

Variations are possible within the scope of the invention.

Eg. instead of a rotating drum with fins, a container can be used, along which walls a number of fins placed on chains are moved around.

Finally, in the illustrative construction with a rotating drum, there may be sensing means for detecting the presence or absence of pellets in the drum.