A tablet press hopper

Abstract

The utility model provides a tablet press hopper, including hopper and stirring subassembly, the hopper top is equipped with the cover plate who cooperates with it, the hopper upper portion is equipped with the stirring cavity, the lower part is equipped with the material collecting chamber, the bottom is equipped with the discharge pipe, the stirring subassembly includes frequency conversion motor, drive shaft, first stirring rod, spiral blade, frequency conversion motor is fixed on the cover plate upper surface, drive shaft upper end passes through the cover plate and is connected with frequency conversion motor output shaft, the lower end stretches into the hopper, the spiral blade is sheathed on drive shaft outer wall, the radius of spiral blade gradually reduces along the direction of downwards, drive shaft upper portion is equipped with first stirring rod, and first stirring rod includes the horizontal rod and the inclined rod who links to each other at the angle, the horizontal rod end is connected with drive shaft, and the inclined rod end is vacant, and the inclined rod is set to tilt downwards and towards the axle. The utility model utilizes second stirring rod to scrape the material that sticks to the inner wall of hopper and makes it flow up by first stirring rod, and the spiral blade on drive shaft is drained, and the material in the middle area is filled.

Description

Technical Field

[0001] This utility model belongs to the field of pharmaceutical preparation technology, and in particular relates to a feeding hopper for a tablet press. Background Technology

[0002] A tablet compressor is a machine that compresses granular or powdered materials into tablets using a punch within a die cavity. It is primarily used in pharmaceutical industry tablet manufacturing processes. The process of processing materials into tablets in a tablet compressor typically involves material filling, pre-compression, main compression, and tablet ejection. During material filling, poor material flowability can easily lead to voids and bridging during the feeding process, affecting production. Chinese utility model CN ​​209633881 U discloses a tablet compressor hopper stirring device, including a servo motor. A cover plate is connected below the servo motor, and the cover plate includes a first part and a second part that are movably connected. The output shaft of the servo motor is also connected to a stirring rod, the lower end of which is connected to a spiral rod. Stirring blades are also connected to the outer wall of the stirring rod, and a cleaning brush is also provided. This device, with stirring from above and material feeding from below, still easily leads to voids and bridging during the feeding process, affecting production progress. Summary of the Invention

[0003] The technical problem solved by this utility model is the phenomenon of hollow cavities and bridging in the feeding hopper of a tablet press due to poor material flowability.

[0004] This utility model provides a feeding hopper for a tablet press, including a feeding hopper and a stirring assembly. The top of the feeding hopper is provided with a cover plate that matches it. The upper part of the feeding hopper is provided with a cylindrical stirring cavity, and the lower part of the feeding hopper is provided with a conical material collection cavity. The bottom of the feeding hopper is provided with a discharge pipe. The stirring assembly includes a variable frequency motor, a drive shaft, a first stirring rod, and spiral blades. The variable frequency motor is fixed on the upper surface of the cover plate. The upper end of the drive shaft passes through the cover plate and is connected to the output shaft of the variable frequency motor. The lower end of the drive shaft extends into the feeding hopper. Spiral blades are sleeved on the outer wall of the drive shaft. The spiral blades are right-hand threads, and the radius of the spiral blades gradually decreases in the downward direction. The upper part of the drive shaft is provided with a first stirring rod, which includes a horizontal bar and a diagonal bar connected at an angle. The end of the horizontal bar is connected to the drive shaft, and the end of the diagonal bar is unloaded. The diagonal bar is inclined downward and oriented towards the axis.

[0005] Furthermore, it also includes a second stirring rod, which is symmetrically arranged on both sides of the drive shaft with the first stirring rod. The second stirring rod is frame-shaped, and a rubber scraper is provided on the outside of the second stirring rod, which contacts the inner wall of the stirring cavity.

[0006] Furthermore, the lower end of the inclined rod extends into the material collection chamber of the hopper.

[0007] Furthermore, the upper end of the spiral blade extends into the mixing cavity of the hopper, and the lower end extends into the bottom of the collecting cavity of the hopper, and the spiral blade rotates clockwise.

[0008] This invention has the following beneficial effects: By providing spiral blades on the transmission shaft for flow guidance, and with the radius of the spiral blades gradually decreasing from top to bottom, a pressure gradient is formed inside the hopper, creating a downward thrust and further enhancing the flow guidance effect. Simultaneously, a first stirring rod and a second stirring rod are provided. The second stirring rod scrapes off the material adhering to the inner wall of the hopper and uses the first stirring rod to make it flow, filling the material in the middle area. The inclined design of the first stirring rod reduces resistance during stirring, minimizes the damage to material particles, and provides a thrust that moves the material towards the center, causing it to flow into the middle area. Attached Figure Description

[0009] Figure 1 A schematic diagram of the feeding hopper of the tablet press of this utility model. Detailed Implementation

[0010] To clearly illustrate the technical features of this solution, specific embodiments are described below in conjunction with the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model.

[0011] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0012] like Figure 1 As shown, a tablet press feeding hopper includes a feeding hopper 1 and a stirring assembly. The top of the feeding hopper 1 is provided with a cover plate 2 that cooperates with it. The upper part of the feeding hopper 1 is provided with a cylindrical stirring cavity, the lower part is provided with a conical material collection cavity, and the bottom is provided with a discharge pipe.

[0013] The mixing assembly includes a variable frequency motor 3, a drive shaft 4, a first stirring rod 5, and spiral blades 6. The variable frequency motor 3 is used to adjust the appropriate motor frequency according to the material flowability. The variable frequency motor 3 is fixed on the upper surface of the cover plate 2. The upper end of the drive shaft 4 passes through the cover plate 2 and is connected to the output shaft of the variable frequency motor 3. The lower end of the drive shaft 4 extends into the hopper. Spiral blades 6 for guiding flow are sleeved on the outer wall of the drive shaft 4. The spiral blades 6 have right-hand threads and rotate clockwise. The radius of the spiral blades 6 gradually decreases in the downward direction. The upper end of the spiral blades 6 extends into the mixing cavity of the hopper 1, and the lower end extends into the bottom of the collection cavity of the hopper 1, so that a pressure gradient is formed from the upper part to the lower part of the hopper 1, creating a downward thrust and further enhancing the guiding effect. The drive shaft 4 is equipped with a first stirring rod 5. The first stirring rod 5 includes a horizontal bar and a diagonal bar connected at an angle. The end of the horizontal bar is connected to the drive shaft 4, and the end of the diagonal bar is unloaded. The diagonal bar is inclined downward and oriented towards the axis. The lower end of the diagonal bar extends into the collection cavity. The slanted rod can reduce resistance during the mixing process, reduce the damage to material particles, and at the same time exert a thrust on the material to move it towards the center, causing the material to flow towards the central area.

[0014] This embodiment also includes a second stirring rod 7, which is symmetrically arranged on both sides of the drive shaft 4 with the first stirring rod 5. The second stirring rod 7 is frame-shaped, and a rubber scraper is provided on the outer side of the second stirring rod 7. The rubber scraper contacts the inner wall of the stirring cavity and scrapes off the material adhering to the inner wall of the hopper 1.

[0015] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0016] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A feeding hopper for a tablet press, characterized in that, Includes a hopper and a mixing assembly. The top of the hopper is equipped with a cover plate that matches it. The upper part of the hopper has a cylindrical stirring cavity, the lower part of the hopper has a conical collecting cavity, and the bottom of the hopper has a discharge pipe. The stirring assembly includes a variable frequency motor, a drive shaft, a first stirring rod, and spiral blades. The variable frequency motor is fixed to the upper surface of the cover plate. The upper end of the drive shaft passes through the cover plate and is connected to the output shaft of the variable frequency motor. The lower end of the drive shaft extends into the hopper. Spiral blades are fitted on the outer wall of the drive shaft. The spiral blades have right-hand threads and the radius of the spiral blades gradually decreases in the downward direction. The upper part of the drive shaft is provided with a first stirring rod, which includes a horizontal bar and an inclined bar connected at an angle. The end of the horizontal bar is connected to the drive shaft, and the end of the inclined bar is unloaded. The inclined bar is inclined downward and oriented towards the axis.

2. The tablet press hopper according to claim 1, characterized in that, It also includes a second stirring rod, which is symmetrically arranged on both sides of the drive shaft with the first stirring rod. The second stirring rod is frame-shaped and has a rubber scraper on its outer side, which contacts the inner wall of the stirring cavity.

3. The tablet press hopper according to claim 1, characterized in that, The lower end of the inclined rod extends into the material collection chamber of the hopper.

4. The tablet press hopper according to claim 1, characterized in that, The upper end of the spiral blade extends into the mixing cavity of the hopper, and the lower end extends into the bottom of the collecting cavity of the hopper. The spiral blade rotates clockwise.

Images