Single punch tablet press

Abstract

The invention discloses a single punch tablet press. The single punch tablet press comprises a frame and a tablet press mechanism arranged on the frame, wherein the tablet press mechanism consists of a middle die, a main pressure mechanism, a feed mechanism and a top flat mechanism; the main pressure mechanism consists of an upper punch and an upper punch transmission mechanism; the feed mechanism consists of a material box and a material box transmission mechanism; the top flat mechanism consists of a lower punch and a lower punch transmission mechanism; the middle die is provided with a vertical punch through hole, and the hole section of the punch through hole is the same as the punch surface of the upper punch or lower punch; the upper punch is arranged at the upper end opposite to a medium pressure through hole, and the lower punch coaxially extends into the medium pressure through hole; the material box is arranged at one side of the middle die, and the lower end face of the material box and the upper end face of the middle die are positioned on the same horizontal plane; the material box has a cylindrical structure which is communicated from top to bottom; and a feeding hopper is arranged above the material box. The single punch tablet press has the advantages of prolonging the service life of the die, along with simple transmission system, small vibration and noise, strong controllability and flexibility, energy conservation and environment friendliness.

Description

technical field [0001] The invention belongs to the technical field of stamping machinery and equipment, and relates to a tablet press for pressing powdery and granular raw materials into tablets, in particular to a single-punch tablet press for tablet production using servo direct drive technology. Background technique [0002] Existing single-punch tablet presses all use a three-phase asynchronous motor as a power source, and use a gear transmission mechanism and a cam transmission mechanism for power transmission. Specifically, an eccentric wheel and two cams are installed on a main shaft, and the eccentric wheel is connected with the upper punch through an eccentric sleeve and a connecting rod to form a crank slider mechanism, which controls the upward and downward movements of the upper punch and generates main pressure during pressing. ; The two cams are respectively connected to the feeder and the lower punch through the connecting rod, and the feeder and the lower pu...

AI Technical Summary

Problems solved by technology

This leads to a short actual pressing time, and there is no short-term dwelling pressure at the bottom dead center, and the air in the powder particles is not easy to discharge, which leads to inaccurate pressing of the tablet, the hardness does not meet the requirements, and it is easy to break

[0005] 2. The transmission system is complex, with high noise and vibration

The existing single-punch tablet press uses traditional transmission mechanisms such as gears and cams. In actual production, most of the energy will be consumed in useless work, and the transmission efficiency is low.

At the same time, when the tablet press is running at high speed, gears, cams and other mechanisms will impact, resulting in greater vibration and noise

[0006] 3. Poor controllability and flexibility of the system

The existing single-punch tablet press adopts the crank slider mechanism and the cam mechanism to control the movement of the upper punch, the feeder and the lower punch, and the movement trajectory and pressing law of the three actuators have been determined and cannot be changed.

This leads to the poor controllability and flexibility of the single-punch tablet press, which cannot achieve various compression curves and cannot meet the needs of different tablet compression.

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