Rotary Press Annular Surface Lock-Out Design
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Solution Overview
Problem
Rotary presses face issues with damage and jamming of pressed articles due to strong deflection towards a lower-located outer annular surface, which increases the risk of mechanical damage and jamming during the ejection process.
Innovation Solution
The annular surface is positioned radially inside the partial circle and limited by a stationary lock-out between deflection means, allowing pressed articles to be deflected only twice and minimizing mechanical stress, with the surface being at the same height as the die plate to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the annular surface is lowered to enable tablet ejection and deflection, then tablets can be discharged from arbitrary locations, but the pressed articles are damaged and jamming occurs due to strong deflection
Solution Approach 1:
The annular surface is positioned at the same height as the die plate upper side, creating an equipotential surface that eliminates the need for strong deflection forces. Tablets are gently guided onto this level surface and can be discharged from any location without experiencing mechanical stress or damage.
2Ease of operation
If strong deflection is applied to direct tablets towards the outer annular surface, then tablets can be moved to discharge channels, but jamming of pressed articles occurs
Solution Approach 1:
By positioning the annular surface at the same height as the die plate, tablets are guided onto a level surface requiring minimal deflection force, eliminating the strong deflection that causes jamming while maintaining efficient transport to discharge channels.
Solution Approach 2:
The first deflecting means acts as an intermediary that gently guides tablets onto the annular surface at the same height, using minimal deflection to achieve efficient transport without causing jamming.
3Adaptability or versatility
If the annular surface is lowered to reach a lock-out, then tablets can be contained and directed, but the pressed articles experience mechanical stress and damage
Solution Approach 1:
The annular surface is positioned at the same height as the die plate upper side, creating a level containment surface that prevents tablet damage while maintaining the ability to contain and direct tablets to appropriate discharge locations.
Data Source
AI summary
A rotary press, with a rotor rotatingly drivable around a vertical axis, which features a die plate having die bores on a partial circle and upper and lower punches guided in guiding devices, radial cams for the upper and lower punches, at least two compression stations spaced apart in the circumferential direction and with an upper and a lower compression roller, a first filling device in the circumferential direction of a first compression station and a second filling device located behind the first compression station in the circumferential direction, wherein the rotor features an annular surface in a radial distance to the partial circle for the die bores and being concentric to the rotational axis of the rotor, wherein first deflecting means are provided between the second compression station and the first filling device that direct the ejected pressed articles towards the annular surface, second deflecting means are provided that direct the pressed articles from the annular surface towards off from the rotor, and third deflecting means behind the first compression station in the circumferential direction which direct the pressed articles ejected from the die bores towards off from the rotor, characterized in that the annular surface is disposed radially inside the partial circle and limited towards the partial circle by an annular stationary lock-out between the first and the second deflecting means.