At present, most of the forced feeding system of the tablet press mainly consists of three parts: (1) the hopper part, which mainly plays the role of storing materials, and the lower part is connected with the forced feeder; (2) the part of the geared motor is the power of the forced feeding system. The source mainly includes three-phase/single-phase motor and worm gear reducer. The output speed is adjustable by the inverter, and the lower part is connected with the forced feeder. (3) The forced feeder is mainly used to fill the material onto the turntable. Among the various die holes, the final mission of the forced feeding system is completed, so the forced feeder is the core component of the entire forced feeding system.
The structure of the forced feeder is mainly to convert the one-way rotation of the geared motor into the reverse rotation of the two material impellers by the engagement of the gears, and the material is filled from the material cavity into the die hole in the turntable by the material of the material. The shape and internal dimensions of the forced feeder vary according to different models. The same model is different according to the designer's design ideas, but the function is the same. The materials are filled into the die hole of the turntable. That is to complete the function of feeding.
The forced feeding system uses the geared motor to drive the reverse rotation of the forcing feeder to feed the impeller, forcibly filling the material into the die hole of the turntable; and the natural material adding system is to use the natural flow of the material under the action of gravity, through the grille The feeder is filled into the die hole in the turntable. This is the difference between the two feeding systems, which is the main reason for the name of the mandatory feeding system.
The main function of the feeding system is to add the material to the die hole in the turntable, and then press the rotation of the turntable to press the material of the die to complete the tablet. Among the many process indicators of tablets, the weight difference is a very important indicator. In addition to the provisions of the Pharmacopoeia, many manufacturers have their own stricter internal control requirements. Factors affecting the difference in tablet weight In addition to the self-quality of the tablet filling mechanism, the turret bouncing, and the size deviation of the die, the stability of the filling amount of the forced feeding system plays a key role in the weight difference of the tablet.
1. The influence of the structure of the forced feeder on the material filling stability The structure of the forced feeder mainly consists of three parts. The following sections analyze each part:
(1) The power conversion part, the function of which is to convert the one-way rotation of the output shaft of the reduction motor into the reverse rotation of the material impeller, that is, the relative rotation of the two impellers, and convey the material discharged from the hopper into the die hole of the turntable;
(2) The supporting part (ie, the auxiliary part), the function of which is to position the forced feeder on the main body, and has a reliable and close positioning requirement for the turntable;
(3) The material impeller and the cavity part, which is the part of the forced feeder that has a direct influence on the material filling stability. When designing the material impeller and the material chamber, the design should consider this problem: to ensure the fluidity of the material; or to change the original state of the material.
In order to ensure the fluidity of the material, the outer dimensions of the material impeller and the inner shape of the material cavity should have a proper ratio. The design should pay attention to the following: First, the material impeller should not be too small (relative to the material cavity), otherwise it will not be able to The role of sufficient material allocation; the second is that the material impeller should not be too large, there should be a certain space in the material cavity to ensure the full flow of the material; third, the structure and shape of the material impeller itself can play the role of sufficient material.
When designing the forced feeder, it is well understood to ensure that the material has good fluidity. Then, why can't the original state of the material be changed? Because the pharmaceutical factory has a requirement for the ratio of each material when pressing the tablet. In order to ensure the compressibility (such as density, wettability, particle size, fluidity, etc.) of the materials while ensuring the composition of the pharmaceutical ingredients and the auxiliary ingredients, if the original state of the materials is changed, the extruded tablets are Other indicators of the agent (such as disintegration, friability, etc.) will be affected, so the original state of the material cannot be changed.
Main products: single punching machine |high speed tableting machine|automatic high speed tableting machine|small tableting machine|rotary tableting machine
The structure of the forced feeder is mainly to convert the one-way rotation of the geared motor into the reverse rotation of the two material impellers by the engagement of the gears, and the material is filled from the material cavity into the die hole in the turntable by the material of the material. The shape and internal dimensions of the forced feeder vary according to different models. The same model is different according to the designer's design ideas, but the function is the same. The materials are filled into the die hole of the turntable. That is to complete the function of feeding.
The forced feeding system uses the geared motor to drive the reverse rotation of the forcing feeder to feed the impeller, forcibly filling the material into the die hole of the turntable; and the natural material adding system is to use the natural flow of the material under the action of gravity, through the grille The feeder is filled into the die hole in the turntable. This is the difference between the two feeding systems, which is the main reason for the name of the mandatory feeding system.
The main function of the feeding system is to add the material to the die hole in the turntable, and then press the rotation of the turntable to press the material of the die to complete the tablet. Among the many process indicators of tablets, the weight difference is a very important indicator. In addition to the provisions of the Pharmacopoeia, many manufacturers have their own stricter internal control requirements. Factors affecting the difference in tablet weight In addition to the self-quality of the tablet filling mechanism, the turret bouncing, and the size deviation of the die, the stability of the filling amount of the forced feeding system plays a key role in the weight difference of the tablet.
1. The influence of the structure of the forced feeder on the material filling stability The structure of the forced feeder mainly consists of three parts. The following sections analyze each part:
(1) The power conversion part, the function of which is to convert the one-way rotation of the output shaft of the reduction motor into the reverse rotation of the material impeller, that is, the relative rotation of the two impellers, and convey the material discharged from the hopper into the die hole of the turntable;
(2) The supporting part (ie, the auxiliary part), the function of which is to position the forced feeder on the main body, and has a reliable and close positioning requirement for the turntable;
(3) The material impeller and the cavity part, which is the part of the forced feeder that has a direct influence on the material filling stability. When designing the material impeller and the material chamber, the design should consider this problem: to ensure the fluidity of the material; or to change the original state of the material.
In order to ensure the fluidity of the material, the outer dimensions of the material impeller and the inner shape of the material cavity should have a proper ratio. The design should pay attention to the following: First, the material impeller should not be too small (relative to the material cavity), otherwise it will not be able to The role of sufficient material allocation; the second is that the material impeller should not be too large, there should be a certain space in the material cavity to ensure the full flow of the material; third, the structure and shape of the material impeller itself can play the role of sufficient material.
When designing the forced feeder, it is well understood to ensure that the material has good fluidity. Then, why can't the original state of the material be changed? Because the pharmaceutical factory has a requirement for the ratio of each material when pressing the tablet. In order to ensure the compressibility (such as density, wettability, particle size, fluidity, etc.) of the materials while ensuring the composition of the pharmaceutical ingredients and the auxiliary ingredients, if the original state of the materials is changed, the extruded tablets are Other indicators of the agent (such as disintegration, friability, etc.) will be affected, so the original state of the material cannot be changed.
Main products: single punching machine |high speed tableting machine|automatic high speed tableting machine|small tableting machine|rotary tableting machine
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