SU755608A1 - Rotor-type tabletting machine - Google Patents

Description

The invention relates to mechanical engineering and can be used for pressing tablets from powdered materials.

Known rotary tablet machine containing a drive drum placed concentric with the axis of rotation tools in the form of tubes with pointed ends and punches, copiers to move tubes and punches, a rotating drive table with a ring tray, as well as the boot device and drive [1].

The disadvantage of such a machine is the need for additional inclined trays for - feeding material from the loading device into the ring tray, which leads to sticking of the material, incomplete filling of the tool, and lower quality of the tablets.

The purpose of the invention is to improve the quality of tablets.

This is achieved by the fact that the table is concentric with an annular tray and has through-holes, while the drum is mounted with an eccentricity relative to the table, and the diameter of the center of the windows in the table is chosen so that the touch is ensured

2

circles centers respectively on the drum and instrument windows in the table, as well as the circle tool centers on the drum and a cylindrical surface, the axis of symmetry of the cross-cut ce ₅ cheniya annular tray, and the said points of tangency are arranged diametrically opposite with respect to the drum axis.

FIG. 1 shows a machine cross section; in fig. 2 - section A — A in FIG. one; in fig. Figure 3 shows a variant of a machine equipped with a conveyor carrying matrices.

The rotary machine contains a drive shaft ί with a drum 2 mounted on it, on the periphery of which tools are mounted, each of which is made in the form of a movable tube 3 with a pointed end and a movable punch 4 located in it, a rotating table 5 with an annular tray 6, a loading device 7 in the form of a bunker, which, if necessary, can be equipped with agitators, as well as a machine drive (not shown).

Each tube 3 and punch 4 are connected respectively with sliders 8 and 9, which

755608

four

controlled by a two-tier stationary copier 10.

Concentric to the axis of rotation of the table 5 are made according to the number of forming tools through windows 11, and table 5 is mounted on a separate shaft 12, the axis of rotation of which is eccentric to the axis of rotation of the drive shaft 1. At the same time, the eccentricity and the diameters of the circles on which the tools are placed are through windows 11 and the axis the symmetry of the cross section of the annular chute 6 is such that the circle 13 of the tool centers on the drum is tangent to the circle 14 of the centers of the through holes 11 and the cylindrical surface 15 defined by the axis of symmetry of the cross section ring ^{1 of the} tray, and the touch points 16 and 17 are diametrically opposed. The shafts 1 and 12 are connected with the drive of the machine, providing them with synchronous rotation.

A variant of the machine can be the use of its design in a rotor and horse car for pressing products. In this case, the shaft 12 is provided with an asterisk 18 coupled to the conveyor 19, in which the dies 20 are located, and in the engagement area of the conveyor with an asterisk, the dies are arranged coaxially through the windows 11.

Works rotary machine as follows.

Powder material from the hopper 7 under the action of its own weight wakes up in the ring tray 6 of the table 5 and fills the part that is currently directly under the bunker 7. As the table 5 rotates continuously with constant angular velocity, the ring tray 6 is filled evenly along its height powder material. The drum 2 rotates synchronously to the table 5. In the area of the annular tray 6 in the zone of point 16 under the action of the copier 10, the pointed tubes are inserted into the powder in tray 6 and cut off the dose of powder inside them, which is pressed by the punch 4 into the tablet. Then, under the action of the copier 10, the tube 3 with punches 4 emerges from tray 6 and moves as the drum 2 rotates above the table 5 mirror. Due to the eccentric position of the drum 2 relative to the table 5, the trajectory (around the circumference 13) of the forming tools coincides ( circumference 14) movement of the trays.

At the point of touch 7, each tube 3 is located coaxially with the corresponding through window 11 of table 5. At this moment, under the action of copier 10, punch 2 pushes tablet 21 out of tube 3, which falls through window 11 into the receiving box 22. Powder material consumed from tray 6 is continuously replenished from bunker 7.

In the case of using a tablet machine in conjunction with a rotary conveyor press machine, tablet 21 is guided through window 11 directly into the matrix 20, which is transported further by conveyor G9 to the press rotors of the machine for manufacturing the part.

After removing the tablet from the machine, the cycle repeats.

Claims (1)

Claim Rotary tablet machine containing a drive drum with concentric-oriented axes of rotation in the form of tubes with pointed ends and punches, copiers for moving tubes and punches, a rotating drive table with an annular tray, as well as a loading device and actuator, characterized in that In order to improve the quality of tablets, in the table concentric with the ring tray there are through windows, while the drum is mounted with an eccentricity relative to the table, and the diameter of the centers of the windows in the table is chosen Kim, provided that respectively contact circle centers tools on the drum and windows in the table, as well as the circle tool centers on the drum and a cylindrical surface, the axis of symmetry contoured annular cross section of the tray, said touch point arranged diametrically opposite with respect to the drum axis.