Squeeze Packing With Curved Cut Surface For Sealing
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Solution Overview
Problem
Existing O-ring-type squeeze packings with cut portions face issues such as reduced sealing performance, misalignment, and poor workability due to the need for adhesives or complex molding processes, which can lead to gaps and increased fabrication costs.
Innovation Solution
A squeeze packing with a three-dimensional curved cut surface extending diagonally and forming an S-shaped profile, allowing for accurate alignment and temporary holding without adhesives, formed through a simple cutting process using a jig with clamping means and a cutting line groove, enabling precise fitting and minimizing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cut portion is provided in the O-ring-type squeeze packing, then the packing can be installed without disassembling the main body, but sealing performance is reduced and cut surfaces are prone to misalignment
Solution Approach 1:
The cut portion is designed with asymmetric features including a stepped structure with different levels and a V-shaped groove at the bottom. This asymmetric geometry prevents misalignment by providing a unique fitting orientation and ensures proper engagement with the groove, thereby maintaining sealing performance while enabling easy installation.
Solution Approach 2:
The cut surfaces are formed with curved surfaces including a V-shaped groove and rounded edges. These curved features facilitate proper alignment during installation by providing natural guiding surfaces that conform to the groove geometry, preventing misalignment while maintaining the integrity of the seal.
2Manufacturing precision
If adhesive is used to coat the cut surfaces, then misalignment is prevented, but workability is reduced due to drying time and adhesive may not be compatible with all sealed fluids
Solution Approach 1:
The cut portion incorporates a stepped structure and V-shaped groove that enable self-alignment during installation. The asymmetric geometry and curved surfaces guide the packing into proper position without requiring external adhesives, eliminating drying time and ensuring compatibility with all sealed fluids while maintaining high alignment accuracy.
Solution Approach 2:
The cut portion is divided into multiple levels or steps with different heights. This segmentation creates a tiered structure that provides progressive alignment guidance, allowing the packing to seat properly in stages and ensuring accurate positioning without the need for adhesive bonding.
3Manufacturing precision
If a complex structure like ball-and-socket joint is used in the cut portion, then misalignment is prevented, but fabrication costs increase and leakage may occur due to molding gaps
Solution Approach 1:
Instead of making the entire cut portion complex, only specific local areas are given special geometry. The stepped structure and V-shaped groove are localized features that provide alignment functionality without requiring complex ball-and-socket joints throughout, thereby reducing fabrication complexity and cost while preventing leakage through precise local geometry.
4Manufacturing precision
If the cut portion is given a complex shape using incision, then misalignment is prevented, but machining becomes difficult and workability is reduced
Solution Approach 1:
The cut surfaces incorporate curved surfaces including V-shaped grooves and rounded edges that can be formed using standard forming or molding techniques. These curved geometries provide alignment functionality without requiring complex incision or machining operations, thereby maintaining manufacturing ease while ensuring accurate alignment during installation.
Data Source
AI summary
The present disclosure provides a squeeze packing having a cut surface that describes a three-dimensional curved surface shape, in which the cut surface can be temporarily held with ease and intimately attached in an accurate manner without the use of an adhesive during fitting onto a device. The squeeze packing has, on at least one arbitrary portion of an endless ring finished to predetermined dimensions, a cut surface describing a three-dimensional curved surface shape extending diagonally so as to form a predetermined angle θ with respect to a radial direction of the ring, having a substantially S-shaped profile in side view, and curving in a width direction.