Applicator Active Backpressure Control via Pump Segmentation
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Solution Overview
Problem
Existing adhesive dispensing systems with a single drive for multiple pump assemblies face delays in detecting flow changes, leading to inconsistencies and inaccuracies due to variations in adhesive physical qualities, resulting in wasted products.
Innovation Solution
A dispensing system with a controller that measures current draw from each pump assembly, adjusts operating speeds individually based on current draws, and directs adjustments to maintain consistent adhesive flow, allowing for quick responses to changes in adhesive flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single drive powers multiple pump assemblies, then device complexity is reduced, but response time to flow changes increases and manufacturing precision deteriorates
Solution Approach 1:
The patent divides the single drive system into multiple independent drive units, with each pump assembly having its own motor and drive mechanism. This segmentation allows each pump to be independently controlled and adjusted, enabling rapid response to flow changes while maintaining consistent adhesive dispensing precision across multiple dispensing modules.
2Device complexity
If a single drive powers multiple pump assemblies, then device complexity is reduced, but response time to flow changes increases
Solution Approach 1:
Each pump assembly is equipped with its own independent drive unit, allowing immediate and independent response to flow changes detected at any dispensing module. This eliminates the delay inherent in single-drive systems where flow changes must propagate through a centralized control mechanism.
Solution Approach 2:
The system incorporates flow monitoring and feedback mechanisms at each dispensing module that directly influence the local drive unit. When a flow change is detected, the feedback loop immediately adjusts the local pump assembly's operating parameters, enabling rapid response without waiting for centralized system intervention.
3Manufacturing precision
If adhesive flow changes are detected, then manufacturing precision can be maintained, but loss of time increases due to detection and response delays
Solution Approach 1:
The system implements distributed feedback loops where each dispensing module monitors its own adhesive flow and provides real-time information to its local drive unit. This localized feedback enables immediate detection and response to flow changes, maintaining manufacturing precision while minimizing detection and response time.
Solution Approach 2:
The system continuously monitors adhesive flow parameters and maintains operational parameters within optimal ranges proactively. When subtle flow changes are detected, the system can preemptively adjust pump assembly parameters before dispensing inconsistencies occur, maintaining precision while reducing response time.
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
The system ensures rapid adjustments to pump assembly operating speeds, reducing dispensing inconsistencies and waste by monitoring current draws and pressure differentials, maintaining consistent adhesive flow and quality.
Implementation Method 1
measuring current draw from each of the plurality of pump assemblies
Implementation Method 2
a plurality of pump assemblies, where each of the plurality of pump assemblies is configured to pump the adhesive
Data Source
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AI summary
The present disclosure describes a method and system for controlling dispensing of adhesive from an applicator. The method includes pumping adhesive from a plurality of pump assemblies to a plurality of dispensing modules and measuring current draw from each of the plurality of pump assemblies. The method also includes determining an adjustment to an operating speed of each of the plurality of pump assemblies individually based on their respective current draws and adjusting the operating speed of each of the plurality of pump assemblies individually.