Rotatable Cover Filling Device for Tablet Presses
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Solution Overview
Problem
Existing tableting machines face challenges in consistently and homogeneously filling die bores at high rotational speeds, especially with materials that stick together or have poor flow properties, and conventional filling devices can cause mechanical stress and alter the consistency of the powder.
Innovation Solution
A filling device with a rotatable covering device and cone, featuring a gap to guide material from a non-rotating filling tube to die bores, eliminating the need for impeller wheels or agitator blades, ensuring gentle and homogeneous material distribution with minimal frictional stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If gravity-fed filling is used, then the structure is simple, but filling becomes uneven and inconsistent at high rotational speeds
Solution Approach 1:
The patent applies the dynamics principle by making the cover device rotatable instead of stationary. The rotatable cover creates a dynamic filling mechanism that maintains consistent material flow into the die bores even at high rotational speeds, resolving the contradiction between simple structure and filling consistency.
2Manufacturing precision
If agitator blades or impellers are used, then material distribution is homogeneous, but mechanical stress and grinding of powder occur
Solution Approach 1:
The patent extracts and eliminates the harmful agitator blades and impellers from the filling device. By removing these mechanical mixing elements, the invention achieves homogeneous material distribution through the rotatable cover design alone, avoiding mechanical stress and grinding of the powder.
Solution Approach 2:
The rotatable cover acts as an intermediary element that facilitates homogeneous material distribution without direct mechanical contact with the powder. It mediates between the material feed and die bores, creating uniform flow patterns without the harmful effects of traditional agitators.
3Productivity
If conventional filling devices are used, then material is fed into die bores, but frictional stress alters powder consistency
Solution Approach 1:
The rotatable cover design creates dynamic material flow paths that reduce frictional stress on the powder. The rotation generates centrifugal forces and flow patterns that minimize contact friction, maintaining powder consistency while enabling continuous material feeding into the die bores.
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
This solution allows for smooth, uncomplicated material feed, maintaining the powder's consistency and ensuring consistent filling without mechanical grinding, even at high rotational speeds, and is easily integrated into existing tableting machines with minimal additional components.
Implementation Method 1
the cover device is rotatably designed and the tableting machine comprises a drive device for generating the rotary movement of the cover device
Implementation Method 2
a gap is formed between the cover device and the cone, which is configured to guide tableting material from a filling tube of the filling device into a region of die bores
Data Source
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AI summary
The invention relates to a filling device (10) for a tableting machine (18) comprising a cover device (16) and a cone (14), wherein a gap (24) is formed between the cover device (16) and the cone (14), which is designed to guide tableting material from a filling tube (12) of the filling device into an area of die bores (28) of a die disk (26).