Metal Laminate Gasket Bead Surface Concavities
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Solution Overview
Problem
Conventional metal laminate gaskets face limitations in increasing surface pressure and sealing properties without using additional metal plates like shims, leading to increased costs and complexity in assembly.
Innovation Solution
The metal laminate gasket incorporates concavities and convexities on secondary metal plates corresponding to the bead's foot or top portions, which increase apparent plate thickness without the need for additional metal plates, enhancing surface pressure and sealing efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the height or width of the bead is increased to improve sealing property, then the sealing property is improved, but the plate thickness must be increased by adding shims which increases cost and assembly complexity
Solution Approach 1:
The invention transitions from modifying the bead geometry in two dimensions (height and width) to utilizing the third dimension by forming concavities and convexities on the plate surface. This dimensional change allows increasing the apparent plate thickness at the bead location without adding separate shim components, thereby improving sealing while avoiding increased assembly complexity
Solution Approach 2:
The invention changes the physical parameters of the plate surface by forming concavities and convexities with specific dimensions (height 0.1-5mm, width 1-10mm). These parameter changes increase the apparent plate thickness locally at the bead position, enabling improved sealing performance without requiring additional metal plates or shims
2Reliability
If additional metal plates like shims are used to increase surface pressure, then the sealing property is improved, but the cost increases due to material and assembly requirements
Solution Approach 1:
The invention merges the functions of the plate structure and the sealing enhancement into a single integrated component. By forming concavities and convexities directly on the plate surface, the design combines the plate's structural role with the sealing enhancement role, eliminating the need for separate shim components and reducing manufacturing cost
Solution Approach 2:
The invention uses surface topology changes (concavities and convexities) to achieve the sealing enhancement function that would otherwise require additional metal plates. This dimensional approach allows the plate itself to provide the necessary apparent thickness increase, avoiding additional material costs
Data Source
AI summary
A metal laminate gasket includes a plurality of metal plates including a first metal plate having a first hole to be sealed and a bead around the first hole, and a second metal plate laminated under the first metal plate and having a second hole corresponding to the first hole. Concavities and convexities are formed at the second metal plate concentrically around the second hole for increasing an apparent plate thickness of the second metal plate. The concavities and convexities are provided continuously at a position corresponding to the foot portion or the top portion of the bead of the first metal plate. The concavities and convexities have a height and width smaller than those of the bead, and have a deformation characteristic due to a surface pressure when compressed, smaller than that of the bead.