Method for forming a strong connection between a holding plate and the wall of a vacuum cleaner filter bag and vacuum cleaner filter bag
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Solution Overview
Problem
Ultrasonic welding of a holding plate to a vacuum cleaner filter bag, especially when the filter bag consists of a film or has metallic spring mechanisms, results in unsatisfactory tensile forces and is difficult to reproduce reliably due to high material thicknesses and uneven ultrasound distribution.
Innovation Solution
A method involving the use of a textile material or thermoplastic film between the holding plate and the filter bag wall, where the textile material is selectively applied and connected to either the wall or the holding plate to enhance the bonding process, allowing for improved tensile strength and reproducibility through techniques like ultrasonic welding or gluing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ultrasonic welding is used to attach the holding plate to the filter bag wall, then the welding time is short and the process is fast, but the tensile force is insufficient and the bond reliability is poor
Solution Approach 1:
The patent applies a multi-layer composite structure consisting of the filter bag wall, textile material, and holding plate. The textile material layer acts as an intermediate composite layer that enhances the bonding interface. This composite structure allows the ultrasonic welding process to effectively transmit energy through multiple layers, achieving both high welding speed and strong tensile force by distributing the stress across the composite interface rather than concentrating it at a single material junction.
Solution Approach 2:
The textile material serves as an intermediary layer between the holding plate and the filter bag wall. This intermediate layer improves ultrasound conduction and distribution, enabling more effective energy transfer during ultrasonic welding. The textile material mediates the interaction between the rigid holding plate and the flexible filter bag wall, creating an optimal bonding interface that maintains both process speed and bond strength.
2Adaptability or versatility
If the holding plate includes spring mechanisms for automatic flap closing, then the functionality is enhanced, but the material thickness increases and ultrasound conduction is impeded
Solution Approach 1:
The textile material acts as an intermediary that bridges the ultrasound energy transmission gap created by the spring mechanisms and increased material thickness. This intermediate layer compensates for the additional thickness introduced by the functional spring components, maintaining effective ultrasound conduction while preserving the automatic closing functionality of the holding plate.
Solution Approach 2:
The textile material is strategically positioned at the bonding interface where ultrasound conduction is most critical. This localized application ensures that the area requiring optimal ultrasound transmission receives enhanced material properties, while the spring mechanisms can be positioned in areas where they provide functional benefits without interfering with the primary bonding zone.
3Adaptability or versatility
If the spring mechanisms are positioned in form-fitting anchors, then the automatic closing function is improved, but the material thickness becomes non-uniform and ultrasound distribution becomes uneven
Solution Approach 1:
The textile material provides localized compensation for the non-uniform thickness created by form-fitting anchors containing spring mechanisms. By positioning this intermediate layer at the bonding interface, the patent ensures that ultrasound energy is distributed more uniformly across the bonding area, while the form-fitting anchors maintain their functional integrity for automatic closing operations.
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
Significantly increases the maximum tensile force required to detach the holding plate, improving the reliability and reproducibility of the bond, especially when the filter bag is made of a film, by enhancing wetting and bonding between the holding plate and the filter bag wall.
Implementation Method 1
by enhancing wetting and bonding between the holding plate and the filter bag wall
Implementation Method 2
techniques like ultrasonic welding or gluing
Data Source
Figure 1a~1d
Figure 2a~2d
Figure 3a~3d
AI summary
The present invention relates to methods for establishing an improved integral connection between a retaining plate and the wall of a vacuum-cleaner filter bag. According to a first variant, rather than the retaining plate being applied directly to the wall of the vacuum-cleaner filter bag, a textile material is arranged between the retaining plate and the wall. The retaining plate and the wall of the vacuum-cleaner filter bag are connected in this case via the textile material. According to a second variant, a film made of a thermoplastic material is arranged in certain regions between the retaining plate and wall of the vacuum-cleaner filter bag. The retaining plate and the wall of the vacuum-cleaner filter bag are connected in this case via the film. According to a third variant, the retaining plate is connected directly to the wall of the vacuum-cleaner filter bag. In this case, at least in the region in which the retaining plate is applied, the wall is in the form of a film made of special thermoplastic materials. The present invention likewise relates to vacuum-cleaner filter bags in which the retaining plate is connected integrally to the wall of the vacuum-cleaner filter bag in accordance with the above-mentioned principles.