Cylindrical Moveable Ground Jaw for Tubing Sealer Heat Management
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Solution Overview
Problem
Existing tubing sealers face challenges in forming strong seals across liquid-filled plastic tubing that can withstand centrifuging pressures while allowing easy separation of segments without compromising the seal's integrity, and they often require high power and cause operator fatigue due to inefficient heat dissipation and separation forces.
Innovation Solution
A hand-held or desk-mounted sealer with a cylindrical moveable ground jaw that focuses RF energy, acts as a heat sink, and promotes convective cooling to create a strong, tearable seal across the tubing, reducing power requirements and facilitating easy separation of segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a massive moveable ground jaw is used to dissipate heat, then heat dissipation is improved, but device complexity and operator fatigue increase
Solution Approach 1:
The moveable ground jaw is configured with a cylindrical surface instead of a flat or complex geometry. This curved surface provides a large area for heat dissipation through convection and radiation while maintaining a simple, compact structure that reduces device complexity and operator fatigue.
2Strength
If high power RF energy is used to form strong seals, then seal strength is improved, but power consumption and heat buildup increase
Solution Approach 1:
The moveable ground jaw converts the harmful effect of excess heat into a beneficial process by using convective cooling and radiation to dissipate heat efficiently. This allows the use of high power RF energy to form strong seals while preventing heat buildup through active heat management.
Solution Approach 2:
The cylindrical configuration of the moveable ground jaw changes the thermal parameters by increasing the surface area for heat dissipation. This parameter change allows the system to handle higher power levels while maintaining safe operating temperatures and preventing premature melting of the tubing.
3Reliability
If the seal is made strong to withstand centrifuging pressures, then reliability is improved, but separation force increases
Solution Approach 1:
The cylindrical moveable ground jaw creates a localized weld zone with specific thermal and mechanical properties. The curved surface geometry produces a seal that is strong enough to withstand centrifuging pressures while maintaining a controlled weld structure that allows for easy separation of tubing segments.
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 cylindrical moveable ground jaw configuration achieves seals that exceed burst strength, require minimal separation force, and allow for efficient heat dissipation, reducing operator fatigue and extending battery life by minimizing power consumption and weld time.
Implementation Method 1
The moveable ground jaw is formed as a relatively massive unit and it is configured to provide a relatively large surface area to encourage heat radiation and convective air cooling.
Implementation Method 2
The moveable ground jaw serves the function of a heat sink to accommodate conductive absorption and radiation of the heated plastic tubing.
Implementation Method 3
it is configured to provide a relatively large surface area to encourage heat radiation and convective air cooling
Implementation Method 4
it is configured to provide a relatively large surface area to encourage heat radiation and convective air cooling
Implementation Method 5
A hand held tubing sealer includes a body housing electronic circuitry for applying radio frequency (RF) energy to the tubing to be sealed
Data Source
AI summary
Tubing sealers, whether hand held or desk mounted, heat seal liquid filled plastic tubing on command to develop sealed liquid filled easily separable segments serially attached to one another. The sealer generates a source of RF energy to heat seal the plastic tubing on placement of the tubing between a fixed jaw and a tubing compressing moveable ground jaw. The moveable ground jaw serves as a heat sink to dissipate heat and prevents a heat buildup during rapid repetitive operation of the sealer. The configuration of the moveable ground jaw coming in contact with the tubing primarily, but in combination with the degree of compression of the tubing and the RF power applied, controls both the integrity of the seal and the ease with which the sealed segments of tubing can be separated from one another.