Coating Nozzle Resonator for Low-Noise Edge Band Activation
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Solution Overview
Problem
Existing devices for applying heat-activated edges to panel-shaped workpieces without adhesive generate high sound pressure, necessitating noise protection measures that complicate access and increase costs.
Innovation Solution
A device with a sound-active element, such as a sound-damping or resonator, integrated into the activation agent's supply line, inflow channel, or outlet area of the nozzle body, reduces sound pressure or shifts frequencies, eliminating the need for noise protection cladding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a device for applying heat-activated edges without adhesive is used, then the coating process is simplified and productivity is improved, but high sound pressure is generated requiring noise protection enclosures that increase device complexity and reduce ease of operation
Solution Approach 1:
The harmful sound generation is extracted and isolated from the main device body by introducing a separate resonator system. The resonator is tuned to the problematic frequency and extracts acoustic energy from the activation agent flow, converting it into a less harmful frequency range that does not require enclosing enclosures.
Solution Approach 2:
The resonator changes the acoustic parameters of the generated sound by tuning it to a specific frequency where it counteracts the harmful sound frequencies. This frequency transformation converts high-pitched noisy sounds into lower-frequency sounds that are less problematic and do not require noise enclosures.
2Reliability
If noise protection enclosures are installed to reduce sound pressure, then operational safety is improved, but access to the machine area becomes more difficult and costs increase
Solution Approach 1:
The harmful high-frequency sound generated by the activation agent flow is converted into beneficial low-frequency sound by the resonator. The resonator uses the original sound energy to create a counteracting frequency that reduces overall noise levels, transforming a harmful effect into a beneficial noise-reduction mechanism that eliminates the need for enclosing enclosures.
3Productivity
If the activation agent flows at high velocity to effectively activate adhesive, then activation efficiency is improved, but sound pressure increases requiring noise protection measures
Solution Approach 1:
The resonator acts as an intermediary between the high-velocity activation agent flow and the surrounding environment. It mediates the sound generation by intercepting the harmful acoustic waves and transforming them into less harmful frequencies, allowing the high-velocity flow to maintain its effectiveness while reducing the harmful sound pressure that would otherwise require protection enclosures.
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 device effectively minimizes sound pressure, enhancing operational safety and reducing costs by allowing easier access and operation without noise protection measures.
Implementation Method 1
The sound-effective element can be designed as a sound-absorbing element and/or as a resonator
Implementation Method 2
a resonator is defined as a device that is tuned to one or more specific frequencies in such a way that, when excited by a broadband signal, it oscillates essentially only at the specified frequency(ies)
Data Source
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AI summary
The invention relates to a device for coating workpieces which preferably consist at least in portions of wood, wood materials, plastics material, aluminum or the like, said device having: a feed device for feeding a coating material; a pressing device for pressing the coating material onto a surface of a workpiece; a conveyor device for inducing a relative movement between the pressing device and the relevant workpiece; and an activation device for activating an adhesive agent on a coating material fed in the feed device and/or for activating an adhesive agent on a surface of a workpiece to be coated. The activation device has at least one supply line for supplying an activation means and a nozzle body having an inflow channel and an outlet region. The activation device has at least one sound-active element which is designed to reduce the sound pressure resulting from the flow of the activation means and/or to effect a frequency shift.