There are over a hundred types of components assembled on the tablet press, and for the machine structure, the rotary tablet press is relatively complex compared to the single stamping press. Taking the small rotary tablet press ZP as an example, we will introduce the components and machine structure of the rotary tablet press.
Structure of the rotary table of the tablet press machine
The machine turntable is the main operating component of the tablet press. It consists of main components such as upper and lower bearing components, spindle, and turntable. The main shaft is supported on bearings and driven by a worm gear pair, connected by splines, to drive the main shaft and rotate the turntable.
Structure of tablet press track machine
The track consists of a cylindrical cam and a planar cam composed of an upper track and a lower track, which are the trajectories of the upper and lower punch rods. The upper track consists of multiple tracks, including upward upward track, upward downward track, upward parallel track, upward parallel track, and downward track. They are respectively fastened to the upper track plate. The lower track consists of a downward upward track, a downward downward track, and a filling track. They are installed separately on the lower track seat.
Fill adjustment components
The filling adjustment component is used to adjust the weight of tablets. The filling adjustment mechanism device is located inside the main body, and a moon shaped filling track can be observed on the plane of the main body. It controls the filling amount by rising or falling through the action of a spiral. When the disc is rotated for adjustment, the filling amount of the clockwise needle decreases, and vice versa increases.
Sheet thickness and pressure regulating components of tablet press
Adjust the thickness (pressure) of the sheet by adjusting the pressure wheel up and down. The lower pressing wheel is installed in the groove of the main body, which is fitted on the eccentric shaft and connected to the handwheel at the outer end. When the external handwheel is adjusted, the eccentric shaft drives the pressing wheel to rise and fall, that is, to adjust the thickness (pressure) of the tablet, in order to control the thickness and hardness of the tablet. The upper pressing wheel can also be adjusted up and down as an adjusting device, but it is generally not adjusted.
Tablet press feeding device
The device consists of a feeding hopper, adjusting screws, and a feeder. The feeder is a moon shaped grid feeder, which is installed on the turntable. The gap between the feeder of the tablet press and the working surface of the turntable, as well as the height of the hopper, are adjusted according to the flowability of the particles.
Transmission device
The transmission part of the tablet press is composed of an electric motor, synchronous belt pulley, worm gear reducer, test handwheel, etc. The electric motor is installed on the motor seat of the base plate. After the motor starts, it transmits power to the reduction worm gear pair through a pair of synchronous belts. The electric speed is adjusted through AC variable frequency stepless speed regulation. Open both sides or the rear door to directly observe and access these components.
Cover components
The shells of ZP tablet press and ZP7A tablet press are fully enclosed and comply with GMP requirements. The upper part is surrounded by four windows for easy cleaning and maintenance. The lower part is enclosed by a stainless steel door, which is usually locked and closed. This door is only opened during maintenance and installation of the die. Install an operation console on the front of the machine. The tablet pressing room is separated from the machine transmission part by a stainless steel enclosure, ensuring the cleanliness of the tablet pressing room and protecting the transmission components from powder contamination and corrosion.