Multi-use Heating Blade with Non-stick Coating for Full Tube Welding
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Solution Overview
Problem
Existing multi-use heating blades for connecting full thermoplastic tubes face challenges such as residual liquid pockets during compression, leading to welding impossibility, and require complex and costly liquid expulsion mechanisms, while also becoming soiled and contaminated, necessitating lengthy cleaning and decontamination processes.
Innovation Solution
A multi-use heating blade with a metal sheet and resistive heating device, featuring a non-stick coating and a folded design to minimize thickness, allowing insertion into tight gaps without additional expulsion mechanisms, and secured with epoxy glue for durability and easy temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-purpose heating blade is used for connecting solid tubes, then the blade becomes soiled and contaminated by tube contents, but immediate reuse is required to maintain productivity
Solution Approach 1:
A non-stick coating is applied to the heating blade surface to act as an intermediary layer between the blade and the tube contents. This coating prevents direct contact and adhesion of molten thermoplastic and liquid materials to the blade, allowing the blade to be removed cleanly and reused immediately without contamination.
Solution Approach 2:
A thin non-stick coating film is deposited on the heating blade surface. This thin film provides non-adherent properties that prevent contamination while maintaining the blade's thermal conductivity and mechanical properties, enabling immediate reuse after operation.
2Ease of operation
If the heating blade thickness is reduced to fit into the gap between anvils, then the blade can be inserted without additional expulsion mechanisms, but the mechanical strength of the blade decreases
Solution Approach 1:
The heating blade is constructed as a composite structure consisting of a metal sheet substrate providing mechanical strength and a non-stick coating layer providing non-adherent properties. This composite design allows the blade to be thin enough to fit into the gap between anvils while maintaining sufficient mechanical strength through the metal substrate.
Solution Approach 2:
The blade design transitions from a single thick element to a thin multi-layer structure. By distributing functionality across different dimensions (metal substrate for strength, coating for non-stick properties), the blade achieves both thinness for gap insertion and sufficient mechanical strength.
3Reliability
If liquid expulsion mechanisms are added to remove residual liquid pockets, then welding becomes possible, but the device complexity and cost increase
Solution Approach 1:
The non-stick coating acts as a mediator that prevents liquid thermoplastic from adhering to the heating blade. This eliminates the need for complex liquid expulsion mechanisms, as the coating itself prevents the harmful interaction between liquid and blade that would otherwise require additional expulsion systems.
Solution Approach 2:
The harmful function of liquid adhesion is extracted from the system by applying the non-stick coating. This removes the need for additional liquid expulsion mechanisms, simplifying the device while maintaining welding capability.
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 immediate reuse after operations, prevents contamination, and maintains mechanical strength and temperature control, facilitating efficient and quality welds without additional liquid management systems.
Implementation Method 1
a resistive heating device suitable for increasing the temperature of the sheet to a predetermined temperature
Implementation Method 2
the sheet comprising an external face intended to come into contact with a tube, the external face being provided with a non-stick coating
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Multi-purpose heated blade (11) suitable for performing several heat-welding operations on a tube (3, 4), comprising a sheet (13) and a heating device (14) being resistive which is suitable for increasing the temperature of the sheet to a predetermined temperature, the sheet comprising an external face (24, 25) intended to come into contact with a tube (3, 4), the external face (24, 25) being provided with a non-stick coating (26).