Capsule Transfer Device with Transport Pins and Vacuum
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Solution Overview
Problem
Current capsule filling machines face inaccuracies in determining the net weight of filled capsules due to imprecise capacitive methods and large variations in empty capsule weights, leading to inefficient weight checking processes.
Innovation Solution
Implementing a gravimetric tare scale and gross scale combination for precise weight determination, where empty capsules are weighed on a gravimetric scale and then reinserted, allowing for net weight calculation by subtracting empty weights from gross weights, and using a transfer device with transport pins and vacuum to safely and quickly move capsules for weighing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If capacitive methods are used to determine net weight, then the weighing process can be performed, but the measurement precision is poor due to large variations in empty capsule weights and system inaccuracies
Solution Approach 1:
The weighing process is segmented into two separate measurements: first weighing the empty capsule (tare weight) and second weighing the filled capsule (gross weight). This segmentation allows each measurement to be performed under optimized conditions, eliminating the need for imprecise direct net weight measurement and enabling accurate determination through subtraction of the two precise measurements.
Solution Approach 2:
The empty capsule weight is determined in advance before the filling process. This preliminary measurement of the tare weight allows the system to later calculate the net weight by subtracting this pre-determined value from the gross weight measurement, avoiding the need for imprecise direct net weight measurement during or after filling.
2Measurement precision
If capsules are removed for weight determination, then accurate weight measurement can be performed, but the removal process must be safe and quick to maintain machine performance
Solution Approach 1:
The capsule holder is designed with movable transport pins that can dynamically adjust their position. During removal, the pins extend to engage and secure the capsule. During insertion, the pins retract to allow easy placement. This dynamic adjustment enables rapid, reliable capsule handling that maintains high machine performance while ensuring accurate weight determination.
Solution Approach 2:
The transport pins act as an intermediary mechanism between the capsule holder and the capsule. They provide a controlled interface for capsule removal and insertion, ensuring that capsules are handled safely and quickly without compromising machine performance or measurement accuracy.
3Measurement precision
If gravimetric tare scale and gross scale combination is implemented, then net weight can be accurately determined, but the device complexity increases
Solution Approach 1:
The weighing device is designed with a universal platform that can accommodate both tare weighing (empty capsules) and gross weighing (filled capsules) using the same physical infrastructure. The single weighing platform serves multiple functions, eliminating the need for separate complex weighing systems and reducing overall device complexity while maintaining high measurement precision.
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 method enhances the accuracy of weight determination, enables safe and rapid capsule removal, and maintains machine performance, allowing for 100% weight control calibration on alternative physical bases like X-ray, thereby improving the overall efficiency of capsule filling processes.
Implementation Method 1
vacuum bores (40) which can be used to suck in the capsules (30) and thus to hold them
Implementation Method 2
weighed on a gravimetric scale 22
Implementation Method 3
Transport pins 44 are arranged below these openings and can be moved vertically in the direction of the underside of the capsules 30
Data Source
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AI summary
A device and a method for transferring a capsule to a weighing device of a preferably intermittently operating capsule filling machine for filling a quantity of material into at least one capsule are proposed, wherein the device comprises means for applying a vacuum to at least one capsule, and furthermore, at least one transport pin is provided to assist in the removal of at least one capsule.