Method for integral connection of a retaining plate to the wall of a vacuum cleaner filter bag and also vacuum cleaner filter bag
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Solution Overview
Problem
The existing methods for connecting a retaining plate to the wall of a vacuum cleaner filter bag, particularly when the wall is made of a thermoplastic film, face challenges such as unsatisfactory tensile strengths and difficulties with ultrasonic welding, especially when the retaining plate has metallic springs that interfere with ultrasound conduction and distribution.
Innovation Solution
The introduction of a textile material or a thermoplastic film between the retaining plate and the wall of the vacuum cleaner filter bag, which is then connected using ultrasonic welding or gluing, enhances the connection strength and reproducibility by improving wetting and energy distribution during the welding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ultrasonic welding is used to connect the retaining plate to the thermoplastic film wall, then the welding time is short and the process is reliable, but the connection strength is unsatisfactory and the metallic springs interfere with ultrasound conduction
Solution Approach 1:
A textile material is introduced as an intermediary layer between the retaining plate and the thermoplastic film wall. This textile material serves as a mediator that transmits ultrasonic energy effectively while providing a suitable surface for welding, thereby resolving the interference caused by metallic springs and improving connection strength without sacrificing welding speed.
Solution Approach 2:
The solution employs a composite structure consisting of the thermoplastic film wall, the textile material layer, and the retaining plate. This composite approach combines the advantages of each material: the film provides the bag structure, the textile provides ultrasonic energy transmission and welding surface, and the retaining plate provides the mounting function, achieving both high strength and fast welding.
2Adaptability or versatility
If the retaining plate has metallic springs for automatic flap closing, then the function is improved, but the springs interfere with ultrasound distribution and energy conduction during welding
Solution Approach 1:
The textile material acts as an intermediary that isolates the metallic springs from the ultrasonic welding process. It provides a continuous, non-metallic surface for ultrasonic energy distribution while allowing the springs to perform their automatic closing function without interfering with the welding energy conduction.
3Ease of manufacture
If the wall is formed from thermoplastic film, then the manufacturing is simplified, but the ultrasonic welding to the film is difficult and achieves poor results
Solution Approach 1:
The textile material serves as an intermediary layer that bridges the gap between the retaining plate and the thermoplastic film. It provides a surface with suitable friction and melting characteristics for reliable ultrasonic welding, while the thermoplastic film maintains its manufacturing simplicity and cost advantages.
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
This method significantly increases the ultrahigh tensile strength of the connection, ensuring reliable attachment of the retaining plate to the filter bag wall, even when the wall is formed from thermoplastic film, and improves the sealing effectiveness.
Implementation Method 1
the connection of the retaining plate and the wall of the vacuum cleaner filter bag is thereby effected via the textile material
Implementation Method 2
a film made of a thermoplastic material is disposed between wall of the vacuum cleaner filter bag and retaining plate
Data Source
AI summary
The present invention relates to methods for the production of an improved integral connection of a retaining plate to the wall of a vacuum cleaner filter bag. According to a first variant, the retaining plate is not applied directly on the wall of the vacuum cleaner filter bag but rather a textile material is disposed between retaining plate and the wall. The connection of the retaining plate and the wall of the vacuum cleaner filter bag is thereby effected via the textile material. According to a second variant, in regions between retaining plate and wall of the vacuum cleaner filter bag, a film made of a thermoplastic material is disposed between wall of the vacuum cleaner filter bag and retaining plate. The connection of the retaining plate and the wall of the vacuum cleaner filter bag is thereby effected via the film. According to a third variant, the retaining plate is connected directly to the wall of the vacuum cleaner filter bag. The wall is thereby formed, at least in the region in which the retaining plate is applied, as film made of special thermoplastic materials. The present invention relates likewise to vacuum cleaner filter bags in which the retaining plate is connected integrally to the wall of the vacuum cleaner filter bag according to the preceding principles.