Packing Machine Ventilation Valve Control
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Solution Overview
Problem
Current packaging machines face challenges in ensuring cleanliness and reducing equipment costs while filling bulk goods into containers, particularly with abrasive materials, due to high internal pressures and the need for multiple pressure sensors.
Innovation Solution
A packaging machine with a conveyor device, ventilation valve, and control unit that adjusts air supply during the filling process, increasing air at the beginning and reducing it at the end to minimize internal pressure and eliminate the need for pressure sensors at each filler nozzle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If compressed air is continuously added during filling to maintain bulk material flowability, then filling effectiveness is improved, but internal pressure in the container increases causing material ejection and contamination
Solution Approach 1:
The patent applies dynamic control of air supply by varying the amount of compressed air added during different phases of the filling process. The control unit adjusts air supply based on filling stage: higher air supply during coarse filling to maintain flowability, and reduced air supply during fine filling to minimize pressure buildup. This dynamic adjustment resolves the contradiction between maintaining filling effectiveness and preventing material ejection.
Solution Approach 2:
The patent changes the parameter of air supply quantity during the filling process. By transitioning from high air supply (coarse filling phase) to low air supply (fine filling phase), the system adapts the air addition rate to the filling stage. This parameter change allows effective filling while controlling internal pressure to prevent contamination.
2Object-generated harmful factors
If pressure sensors are installed at each filler neck to monitor and control internal pressure, then material ejection is prevented, but equipment complexity and cost increase significantly
Solution Approach 1:
The patent implements a self-service control system where the control unit monitors filling progress and automatically adjusts air supply without requiring external pressure sensors at each filler neck. The system uses filling stage detection and predetermined control strategies to manage internal pressure, eliminating the need for expensive pressure sensing equipment while still preventing material ejection.
Solution Approach 2:
The patent replaces the mechanical pressure sensing system with a control-based air supply adjustment system. Instead of using pressure sensors to detect and respond to internal pressure changes, the system uses a control unit to proactively manage air supply based on filling stage, substituting mechanical measurement with intelligent control.
3Object-generated harmful factors
If waiting time after filling is extended to allow pressure reduction, then material ejection is prevented, but economic efficiency decreases
Solution Approach 1:
The patent applies preliminary action by reducing air supply during the fine filling phase before the container is removed. This proactive pressure management ensures that internal pressure is already reduced by the time filling completes, eliminating the need for extended waiting time. The control unit anticipates the pressure issue and addresses it during the filling process itself.
Solution Approach 2:
The patent skips the traditional waiting time period by implementing pressure control during filling. The system rushes through the pressure management issue by actively controlling air supply throughout the filling process, ensuring pressure is managed before container removal rather than waiting passively after filling completes.
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 approach ensures reliable filling with reduced air introduction, preventing material escape and contamination, improving weight accuracy, and lowering equipment costs by eliminating the need for pressure sensors, thus enhancing the economic efficiency and cleanliness of the packaging process.
Implementation Method 1
a ventilation device with at least one ventilation valve (8) and at least one ventilation nozzle (26) on the product path between the product supply (4) and at least one product outlet (11)
Implementation Method 2
A conveyor turbine, which is constructed similarly to a rotary valve, conveys the bulk material from the filling pot into the connected filling channel by rotating the turbine blades
Implementation Method 3
When filling bulk goods into containers such as valve sacks or open sacks, it is usually necessary to add compressed air to fluidize the bulk material to be filled. By adding compressed air, the bulk material is kept or made flowable
Data Source
Figure 1
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AI summary
The invention relates to a packing machine and to a method for filling bulk materials in containers, wherein the packing machine comprises a product store, a conveying device, a filling stub, a ventilation device having a ventilation valve and a ventilation nozzle in the product path between the product store and a product outlet. The ventilation valve is configured such that the ventilation valve can be controlled via a control unit, and the control unit and the ventilation valve are configured and designed to adjust the effective amount of air passing through the ventilation nozzle in a plurality of stages in a controlled manner, and wherein a characteristic curve (19) of the ventilation valve (8) is stored in the control unit (12).