Sealing Device Flange Pre-Shaping for Rust Prevention
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Solution Overview
Problem
The existing manufacturing method for sealing devices risks rust generation and deformation of the flange portion due to presser projections in the metal mold, leading to incomplete coating and defective molding.
Innovation Solution
The method involves forming the flange portion of the reinforcing ring into an uneven shape opposite to the deforming direction to prevent deformation and ensure complete coating by the molding material, which bypasses the metal mold surface, thereby preventing rust and maintaining the original shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If presser projections are used in the metal mold to press the flange portion, then the coating layer can be formed, but the flange portion deforms and rust generates
Solution Approach 1:
The flange portion is pre-formed with an uneven shape opposite to the deformation direction before the molding process. This preliminary shaping anticipates the deformation that will occur during vulcanization, allowing the flange to deform into the desired flat shape while preventing metal surface exposure and rust generation.
Solution Approach 2:
The uneven shape is formed in advance to counteract the deformation caused by filling pressure. By creating the opposite deformation beforehand, the flange portion resists the harmful effects of pressure-induced deformation and prevents coating defects.
2Manufacturing precision
If presser projections are used to form the coating layer, then coating can be achieved, but molding defects occur
Solution Approach 1:
The flange portion is pre-shaped with an uneven geometry that accounts for the deformation that will occur during molding. This preliminary action ensures that when the molding material is filled, the flange deforms into the correct shape without creating holes or coating defects.
3Shape
If the flange portion is kept flat, then the original shape is maintained, but deformation occurs during molding
Solution Approach 1:
The flange portion is pre-formed with an uneven shape that is the opposite of the deformation that will occur during molding. This preliminary action allows the flange to maintain its intended shape after deformation, as the pre-formed unevenness compensates for the pressure-induced deformation.
Solution Approach 2:
The flange portion is given an asymmetric uneven shape instead of a symmetric flat shape. This asymmetry is deliberately designed to counteract the deformation forces during molding, allowing the flange to achieve the desired flat appearance after deformation occurs.
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 approach effectively prevents rust generation and ensures a complete, well-shaped coating of the flange portion, preventing defective molding and maintaining the original shape of the flange portion during the manufacturing process.
Implementation Method 1
integrally vulcanization bonding the labyrinth lip 102, the anti-dust lips 103 and 104, and an anti-grease lip 105 as shown in FIG. 8. The labyrinth lip 102, the anti-dust lips 103 and 104 and the anti-grease lip 105 are made of a rubber-like elastic material (a rubber material or a synthetic resin material having a rubber-like elasticity), and is integrally vulcanization bonded to the reinforcing ring 101
Data Source
AI summary
The object of the present invention is to effectively prevent the rust generation on a flange portion and to prevent the deformation of the flange portion due to the filling pressure of a molding material in the manufacture of a sealing device whereby a seal main body comprising a rubber-like elastic material and having a portion that covers both surfaces of the flange portion of a metal reinforcing ring is integrally formed on the reinforcing ring by means of a metal mold. To this end, the flange portion of the reinforcing ring is formed in advance with a shape which is distributed unevenly in the direction opposite the direction in which the flange portion is deformed from its original shape by the filling pressure of the molding material.