Thread Sealing Coating Application for Tapered Thread Adhesion
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Solution Overview
Problem
Existing devices fail to consistently apply a sealing coating to threads, particularly tapered threads, resulting in slippage and bead formation that leads to sealing defects and leaks during assembly, especially when dealing with gases.
Innovation Solution
A device with positioning, application, and rotational mounting means that stretches and tensions a strip of sealing material to ensure proper adhesion to the thread, preventing slippage and enhancing sealing efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strip of sealing material is deposited on a thread using existing machines, then the sealing material can be applied to the thread, but the strip tends to slip relative to the thread and/or form beads resulting in sealing defects
Solution Approach 1:
The thread is rotated around its axis before and during the application of the sealing material strip. This preliminary rotation ensures that the strip is properly positioned and adheres uniformly to the thread surface, preventing slippage and bead formation during subsequent assembly operations.
Solution Approach 2:
The invention introduces rotational movement of the thread during the sealing material application process. The thread rotates around its axis while the sealing material is being applied, creating dynamic conditions that improve adhesion and prevent the strip from slipping or forming beads, thereby resolving the contradiction between sealing reliability and manufacturing precision.
2Device complexity
If the sealing material strip is applied without rotation, then the application process is simpler, but the strip slips and forms beads causing leaks
Solution Approach 1:
The thread is rotated around its axis before and during the application of the sealing material strip. This preliminary rotation ensures that the strip is properly positioned and adheres uniformly to the thread surface, preventing slippage and bead formation during subsequent assembly operations.
Solution Approach 2:
The invention introduces rotational movement of the thread during the sealing material application process. The thread rotates around its axis while the sealing material is being applied, creating dynamic conditions that improve adhesion and prevent the strip from slipping or forming beads, thereby resolving the contradiction between sealing reliability and manufacturing precision.
3Adaptability or versatility
If the sealing material is applied to tapered threads, then tapered thread sealing is achieved, but slippage and bead formation are much more perceptible and recurrent
Solution Approach 1:
The thread is rotated around its axis before and during the application of the sealing material strip. This preliminary rotation ensures that the strip is properly positioned and adheres uniformly to the thread surface, preventing slippage and bead formation during subsequent assembly operations.
Solution Approach 2:
The invention introduces rotational movement of the thread during the sealing material application process. The thread rotates around its axis while the sealing material is being applied, creating dynamic conditions that improve adhesion and prevent the strip from slipping or forming beads, thereby resolving the contradiction between sealing reliability and manufacturing precision.
Data Source
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AI summary
The invention relates to a device (1) for equipping a thread (A) with a sealing coating. This device (1) comprises, on the one hand, positioning means (2) configured to position a strip of a sealing material (B) over the thread (A), on the other hand, application means (3) configured to apply the strip of sealing material (B) against the thread (A), and, on the other hand, rotational mounting means (7) configured to mount the thread (A) in rotation about an axis, relative to the positioning means (2) and/or relative to the application means (3). The invention also relates to a method for equipping a thread with such a sealing coating.