Dispensing Unit Mass Dampener for Vibration-Stable Placement
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Solution Overview
Problem
Existing dispensing systems for viscous materials on substrates face challenges in achieving accurate placement and minimizing vibration, which affects the precision and efficiency of the dispensing process.
Innovation Solution
A dispensing system with a mass dampener assembly that includes a movable bracket and a mass dampener, coupled to the dispensing unit, allowing rotation and z-axis movement, and a vision system for precise positioning, along with a strain wave gear drive assembly to tilt and rotate the dispensing unit, reducing unwanted vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a dispensing unit is mounted to a moving assembly for precise positioning, then dispensing accuracy is improved, but vibration increases affecting placement precision
Solution Approach 1:
A mass dampener assembly is introduced as an intermediary component between the dispensing unit and the moving assembly. This dampener absorbs and dissipates vibration energy, reducing the harmful vibrations that affect dispensing accuracy while allowing the system to maintain its precise positioning capabilities.
Solution Approach 2:
The mass dampener assembly incorporates elastomeric materials with specific damping properties to create a composite structure that effectively reduces vibration. The combination of the dampener mass, elastomeric mounting elements, and structural components creates a system that filters out harmful vibrations while maintaining operational precision.
2Manufacturing precision
If the dispensing unit is lowered along the z-axis for dispensing, then material placement accuracy is improved, but vibration from z-axis movement increases
Solution Approach 1:
The mass dampener assembly acts as a vibration isolator between the z-axis drive mechanism and the dispensing unit. During z-axis lowering and positioning operations, the dampener absorbs the vibrations generated by the drive mechanism, allowing the dispensing unit to achieve and maintain accurate placement without being subjected to harmful vibrational disturbances.
3Manufacturing precision
If a mass dampener assembly is added to reduce vibration, then dispensing accuracy is improved, but device complexity increases
Solution Approach 1:
The mass dampener assembly is designed as a self-contained intermediary unit that can be integrated into the existing dispensing system architecture. By consolidating the damping function into a discrete assembly with standardized components, the overall system complexity is managed while achieving the desired vibration reduction and accuracy improvement.
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 achieves improved accuracy in dispensing viscous materials with reduced vibration, enabling precise placement and faster settling times, thus enhancing the overall dispensing process efficiency.
Implementation Method 1
a mass dampener assembly coupled to the movable bracket, the mass dampener assembly being configured to reduce vibration of the dispensing unit during operation
Implementation Method 2
a strain wave gear drive assembly to tilt and rotate the dispensing unit
Data Source
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AI summary
A dispensing system includes a frame, a support, a dispensing unit assembly, and a gantry. The gantry is configured to support the dispensing unit assembly and to move the dispensing unit assembly in x-axis and y-axis directions. The dispensing unit assembly includes a support bracket secured to the gantry and a movable bracket rotatably coupled to the support bracket configured to enable the rotation of the movable bracket with respect to the support bracket about a first axis, with a dispensing unit rotatably coupled to the movable bracket configured to enable the rotation of the dispensing unit with respect to the movable bracket about a second axis generally perpendicular to the first axis. A mass dampener assembly is coupled to the movable bracket, with the mass dampener assembly being configured to reduce vibration of the dispensing unit during operation.