Stationary Rotary Tablet Press with Decoupled Drive
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Solution Overview
Problem
Existing tablet presses face issues with contamination and operational disruptions when processing sticky natural substances, leading to reliability concerns during the tablet production process.
Innovation Solution
A stationary rotary tablet press design with a permanently arranged lower punch in the die mold, coupled with a decoupling mechanism and linear actuators, ensures reliable interaction and minimizes contamination, allowing for precise positioning and easy operation, including the use of a filling channel and pressure cylinders for efficient material supply and pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lower punch is moved out of the die for ejection, then the tablet can be removed from the die, but the die and lower punch become contaminated and sticky when processing sticky natural substances
Solution Approach 1:
Instead of removing the lower punch from the die for ejection (conventional approach), the patent inverts the approach by keeping the lower punch permanently arranged in the die and using the die itself to eject the tablet. This reversal eliminates the contamination problem while maintaining ejection functionality.
Solution Approach 2:
The ejection function is extracted from the lower punch and transferred to the die. The die, which was previously only a molding tool, now serves dual purposes: molding the tablet and ejecting it. This extraction eliminates the need for the lower punch to leave the die, preventing contamination.
2Productivity
If a rotary drive system is used for the rotating unit, then rotation can be achieved, but the system becomes complex and difficult to control for indexed movement
Solution Approach 1:
The patent replaces complex rotary drive systems with linear actuators that control the rotation of the rotating unit. This substitution simplifies the drive mechanism while enabling precise indexed movement through electronic control, reducing mechanical complexity.
Solution Approach 2:
The system uses dynamic control with linear actuators that can be precisely positioned and controlled electronically. This allows for flexible, programmable indexed movement patterns without the mechanical complexity of traditional rotary drives, enabling adaptive processing sequences.
3Object-affected harmful factors
If the lower punch is permanently arranged in the die, then contamination is minimized, but the ejection mechanism becomes less effective
Solution Approach 1:
The patent inverts the conventional ejection mechanism by using the die itself to eject the tablet rather than relying on a separate lower punch. This inversion maintains the permanent arrangement of the lower punch in the die (preventing contamination) while achieving effective ejection through the die's movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly reduces contamination and adhesion issues, ensures reliable operation with sticky materials, and allows for precise control over tablet size and density, enhancing the overall efficiency and reliability of the tablet production process.
Implementation Method 1
The drive unit has a linear actuator. It has been demonstrated that reliable and indexed rotation of the rotary unit can be achieved with a linear actuator in addition to standard rotary drive systems.
Implementation Method 2
the pressing force generation unit can comprise a pressure cylinder and at least one further pressure cylinder
Data Source
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AI summary
The present invention aims to improve a stationary rotary tablet press and a corresponding method for tablet production in such a way as to reduce the susceptibility to errors and malfunctions, particularly when compressing sticky filling materials. This objective is achieved by a tablet press and a tablet production method in which the lower punch is arranged in the die of the rotary unit and rotates with the rotary unit, and a coupling unit can couple and decouple a drive unit from the rotary unit.