Variable Output Dispensing Applicator Rapid Transition
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Solution Overview
Problem
Existing adhesive applicators lack the ability to rapidly and efficiently transition between full and partial adhesive output volumes without duplicative valve and pump structures, leading to increased manufacturing costs and maintenance requirements.
Innovation Solution
A variable output dispensing applicator featuring a manifold with a liquid supply passage and a liquid dividing module that controls adhesive flow by selectively routing it between a dispensing outlet and a recirculation passage, allowing for near-instantaneous changes between full and partial volume dispensing states using a valve member and internal passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If duplicative valve and pump structures are used to enable transitions between full and partial adhesive output volumes, then the ability to rapidly transition between dispensing states is improved, but manufacturing costs and device complexity increase
Solution Approach 1:
The patent combines multiple valve functions into a single integrated valve structure. The valve member simultaneously controls both the first adhesive flow path (to dispensing outlet) and the second adhesive flow path (to recirculation passage), eliminating the need for duplicative valve and pump structures while maintaining the ability to rapidly transition between full and partial output states
Solution Approach 2:
The single valve member performs multiple functions: it can fully open to allow complete adhesive flow to the dispensing outlet, partially open to divide flow between dispensing and recirculation paths, and fully close to stop dispensing while maintaining recirculation. This multi-functionality replaces what would traditionally require multiple separate valves and pumps
2Adaptability or versatility
If duplicative valve and pump structures are used to control varying adhesive output volumes, then dispensing flexibility is improved, but maintenance requirements increase
Solution Approach 1:
By merging multiple valve and pump functions into a single integrated valve assembly, the patent reduces the number of components that require maintenance. The unified structure has fewer moving parts and connection points, simplifying maintenance while preserving dispensing flexibility through the valve member's ability to control multiple flow paths
3Device complexity
If a single valve structure is used to control adhesive flow division, then device complexity is reduced, but the ability to control adhesive flow rates may be limited
Solution Approach 1:
The valve member is designed with dynamic positioning capability, allowing it to assume multiple positions (fully open, partially open at various degrees, fully closed). This dynamic adjustment enables continuous control of adhesive flow division between the dispensing and recirculation paths, providing fine-tuned flow rate control despite using a single valve structure
Solution Approach 2:
The valve member divides the adhesive flow into separate paths (first flow path to dispensing outlet, second flow path to recirculation passage) based on its position. This flow segmentation capability allows independent control of dispensing and recirculation flows, maintaining sophisticated flow rate control with a single valve structure
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
Enables the creation of complex adhesive deposition patterns with zones of full and reduced adhesive output, improving operational efficiency and reducing material waste by allowing rapid transitions between dispensing states without the need for duplicative valve and pump structures.
Implementation Method 1
the module redirects the pressurized adhesive material from the liquid material inlet of the module to a recirculation outlet which, for example, leads back into a supply manifold
Implementation Method 2
the process air is typically also heated so that the process air does not substantially cool the thermoplastic adhesive material prior to deposition of the adhesive material on the substrate
Data Source
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AI summary
A variable output dispensing applicator is configured to dispense patterns of adhesive onto a substrate, such as striped patterns and box-shaped patterns defined by zones of full volume adhesive and zones of reduced volume adhesive. The dispensing applicator includes a liquid dividing module positioned directly between a supply manifold and a dispensing module. The liquid dividing module divides flow of adhesive from the manifold into first and second partial flows of adhesive, one of which continuously flows to the dispensing module and another of which is controlled to either be recirculated or delivered to the dispensing module. These different operating states of the liquid dividing module therefore enable highly responsive and rapid switching between a reduced or partial volume output and a full volume output immediately before discharge at the dispensing module.