Filling Machine Valve Timing Advance for Spillage Reduction
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Solution Overview
Problem
Filling machines experience intrinsic delays due to mechanical inertia and pneumatic power control, leading to prolonged valve opening transients and product spillage, especially in non-contact filling, which reduces the nominal filling angle and affects production volume.
Innovation Solution
The filling machine incorporates a control unit that sends an advance opening signal to the filling valve, allowing it to open before reaching the container, compensating for the delay and maintaining the nominal filling angle, and includes an adjustable angular sector to set the advance time, enabling flexible adaptation to different container formats and operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the filling valve is controlled to open at the input station, then the filling operation can be synchronized with container arrival, but the valve opening transient causes product spillage and reduces the effective filling angle
Solution Approach 1:
The control unit sends the opening signal to the filling valve in advance, before the container reaches the input station. This preliminary action allows the valve to complete its opening transient before filling begins, eliminating product spillage during valve transition and preserving the full nominal filling angle for productive filling operation.
2Loss of substance
If the valve opening transient is reduced, then product spillage is minimized, but the mechanical inertia and pneumatic control limitations make this difficult to achieve
Solution Approach 1:
Instead of attempting to mechanically reduce the valve opening transient, the system performs the valve opening action in advance of the filling operation. This temporal separation allows the valve to complete its natural transient response before the container is in position, eliminating spillage without requiring complex valve modifications.
3Loss of substance
If the filling angle is reduced to accommodate valve transient, then product spillage is avoided, but production volume is reduced
Solution Approach 1:
By opening the valve in advance of container arrival, the system recovers the full nominal filling angle for productive use. The valve transient occurs during the advance period rather than during the filling arc, allowing the complete filling angle to contribute to production volume without compromising spillage prevention.
4Manufacturing precision
If the advance opening signal timing is fixed, then the valve opening is synchronized for a specific container format, but flexibility to accommodate different container formats is lost
Solution Approach 1:
The control unit dynamically adjusts the advance opening signal timing based on the detected container format. The system incorporates sensors or input mechanisms to identify container characteristics and automatically modifies the timing parameters, allowing precise synchronization for each format while maintaining flexibility across multiple container types.
Data Source
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AI summary
There is described a filling machine (1) configured to fill containers (2) with a pourable product and comprising: a conveyor (3) configured to receive containers (2) to be filled at an input station (I) thereof, to advance a succession of the containers (2) along a filling path, and to release filled containers (2) at an output station (O) thereof; a plurality of filling devices (4) carried by the conveyor (3) and each configured to fill one container (2) at a time with a predetermined amount of pourable product during its advancement along the filling path, each filling device (4) comprising a filling valve controllable between an open position and a closed position ; and a control unit (8) configured to generate an opening control signal for triggering the opening of the filling valves and to sequentially send said opening control signal to each filling device (4); wherein each filling device (4) is configured to receive one container (2) at a time at the input station (I); and wherein the control unit (8) is configured to send the opening control signal to each filling device (4) with an advance time before the filling device (4) itself receives the container (2) to be filled.