S-Shaped Sealing Element for Plastic Sheet Stamping
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Solution Overview
Problem
Existing sealing elements for plastic sheets suffer from wear and deformation due to material fatigue and excessive pressure, leading to instability in producing smooth stamping fields during the sealing process.
Innovation Solution
A sealing element with a base body featuring two offset slots forming a multi-layer spring element, designed with U-shaped slots and bores to distribute stress evenly and resist deformation, made from high-grade steel to minimize material stress and maintain spring force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a spring mechanism is integrated into the sealing element to provide constant pressure, then the sealing force is maintained, but the spring undergoes heavy wear and its characteristic changes due to constant loading
Solution Approach 1:
The patent changes the physical state of the spring element by transforming it from a traditional coil spring to a flat spring with specific geometric features (slots and bores). This parameter change in the spring's structure allows it to maintain sealing force while significantly improving durability and resistance to wear under constant loading conditions.
2Device complexity
If a thin bending beam is formed between two slots in the sealing element to reduce spring mechanism complexity, then the structure is simplified, but the sealing element can be plastically deformed and destroyed under excessive pressure
Solution Approach 1:
The patent segments the base body by forming two slots that extend into it, creating a spring element with multiple sections. These slots are offset vertically and define an S-shaped section, dividing the material into manageable segments that can flex independently, simplifying the structure while maintaining strength.
Solution Approach 2:
The spring element is formed as an integral part of the base body, creating a composite structure where the slots and bores work together to provide both flexibility and strength. The U-shaped slots with bores create a multi-layer spring element that combines the benefits of geometric design with material properties to resist plastic deformation under excessive pressure.
3Duration of action of moving object
If slots are made taller to increase spring travel, then the spring can accommodate larger deformations, but the spring stiffness decreases and the stamping field smoothness is compromised
Solution Approach 1:
The patent addresses the trade-off between spring travel and stiffness by introducing a new dimension to the spring design through U-shaped slots with bores. This three-dimensional configuration allows the spring to achieve adequate travel range while maintaining the necessary stiffness through the geometric constraints of the U-shape and bore positioning, preventing excessive deformation that would compromise stamping field smoothness.
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 sealing element provides long-lasting fatigue strength and resistance to operating errors, ensuring smooth stamping fields without wear or destruction, even under excessive pressure, by distributing force uniformly and minimizing material stress.
Implementation Method 1
a first slot and a second slot, which are offset vertically from one another, are formed in the base body. These slots form a spring element
Data Source
AI summary
The sealing element for integration into a sealing tool for producing smooth stamping fields during the sealing of two plastic sheets has a base body. A first slot extends into the base body from a first narrow lateral surface, and a second slot, which is offset vertically from the first slot, extends into the base body from a second narrow lateral surface, in such a way that the two slots define a section of the base body which has substantially the shape of an S or reversed S. The first slot has a U-shape with a first leg of the first slot being longer than a second leg of the first slot, and the second slot has a U-shape with a first leg of the second slot being longer than a second leg of the second slot. Each of the two slots expands at its inner end to form a bore.