Lightweight Metal Showerhead via Plastic Deformation
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Solution Overview
Problem
Conventional metal showerheads are heavy and costly due to thick walls, requiring large amounts of raw materials and resulting in a high environmental impact from CO2 emissions during transport.
Innovation Solution
A method for manufacturing a metal showerhead involving plastic deformation of metal pipes to form a predetermined shape, creating a shell shape with spray holes, placing a water conduit member, and closing the opening portion using laser welding, allowing for a thinner, lighter design with increased design freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal pipe is formed by casting, then structural strength is improved, but wall thickness increases and weight increases
Solution Approach 1:
The patent changes the manufacturing method from casting to plastic deformation (bulge forming), which allows for thinner wall thickness while maintaining structural integrity. This parameter change in the forming process enables production of lightweight metal showerheads with wall thickness of 0.5-1.0mm, reducing weight by 50% or more compared to conventional cast products
2Strength
If metal pipe wall thickness is increased, then structural strength is improved, but material cost increases
Solution Approach 1:
The patent applies plastic deformation processing to metal pipes with wall thickness of 0.5-1.0mm, achieving sufficient structural strength without increasing material quantity. The bulge forming process strengthens the pipe through work hardening, allowing thin-walled construction that reduces raw material consumption by 50% or more compared to conventional thick-walled cast products
3Ease of manufacture
If conventional casting method is used, then manufacturing simplicity is maintained, but design freedom is limited
Solution Approach 1:
The patent employs dynamic bulge forming process that can adapt to various design requirements. By controlling the bulge forming parameters and tooling, the process can produce diverse shapes including curved surfaces and complex geometries that are difficult to achieve with conventional casting, significantly expanding design freedom while maintaining manufacturing efficiency
Solution Approach 2:
The plastic deformation process allows for continuous adjustment of forming parameters (pressure, temperature, strain rate) to achieve different design outcomes. This parametric control enables production of various showerhead shapes and configurations from the same base metal pipe, providing greater design versatility compared to fixed mold-based casting methods
4Reliability
If thick-walled metal construction is used, then durability is improved, but environmental impact increases
Solution Approach 1:
The patent produces thin-walled metal showerheads (0.5-1.0mm thickness) through plastic deformation, reducing material quantity by 50% or more. This directly decreases transportation weight and associated CO2 emissions, while the work hardening effect during forming maintains sufficient durability and structural integrity for long-term use
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 method enables the production of a lightweight, cost-effective metal showerhead with a uniform metal appearance and superior aesthetics, reducing material and transportation costs while minimizing environmental impact.
Implementation Method 1
a welding step for closing the opening portion by laser welding a metal member to the opening portion
Implementation Method 2
a shell shape forming step for forming the metal pipe into a predetermined shape by plastic deformation of metal pipe
Data Source
AI summary
The present invention has the object of providing a metal showerhead lighter than previous, at a low cost. A showerhead 3 furnished with an outer cylinder 31 in which a metal plate is plastically deformed and formed into a cylindrical shape in which the base end portion thereof is left open; and a water conduit member 32 which is inserted from the open end of the base end portion side into the outer cylinder to supply hot or cold water supplied from a hose into outer cylinder 31; whereby a gripping portion 311 for holding outer cylinder 31 by hand is provided on the base end portion of outer cylinder 31, and a spray portion 33 is provided in which multiple spray holes 33b are formed to spray hot or cold water supplied by water conduit member 32 to the front end portion side of outer cylinder 31.