Faucet Spout Plastic Liner Secure Integration
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Solution Overview
Problem
Existing faucet spouts with metal housings and plastic liners often experience loose fits, leading to kinking issues due to the separate manufacturing process of the plastic liner, which fails to provide a tight and secure integration.
Innovation Solution
A method of molding a plastic insert with a high melting point into a metal housing using a controlled low-temperature metal mold process, ensuring the plastic insert remains intact and secure within the metal housing, preventing kinking and ensuring a tight fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the plastic liner is made separately and placed inside the metal housing, then the manufacturing process is simpler, but the liner becomes loose and kinks
Solution Approach 1:
The patent merges the plastic liner manufacturing with the metal housing casting process by placing the pre-formed plastic liner inside the mold before pouring molten metal. This combines two separate manufacturing steps into one integrated process, ensuring the liner is permanently secured in position while maintaining manufacturing efficiency.
Solution Approach 2:
The plastic liner is pre-formed and placed inside the mold cavity before the metal casting process begins. This preliminary positioning ensures the liner is correctly situated and secured before the metal is poured, preventing any loose fit or kinking during subsequent handling and installation.
2Ease of manufacture
If the metal mold temperature is high enough for proper metal casting, then the metal flows well, but the plastic liner melts
Solution Approach 1:
The patent changes the temperature parameter of the mold by actively cooling it to a low temperature (below the plastic's melting point) before and during the metal pouring process. This temperature parameter change allows high-temperature metal casting to proceed without melting the plastic liner, as the cooled mold absorbs heat rapidly from the molten metal.
Solution Approach 2:
The patent utilizes the phase transition of the metal from liquid to solid. By pouring molten metal into the cooled mold, the metal rapidly solidifies upon contact with the cool mold walls and liner, creating a tight fit without requiring the mold to remain at high temperatures, thus protecting the plastic liner from melting.
3Ease of operation
If the plastic liner is loose inside the spout, then installation is easier, but the liner kinks and fails
Solution Approach 1:
The patent merges the liner positioning and securing functions into the casting process itself. The metal housing is formed around the liner in a single operation, automatically securing the liner in the correct position without requiring separate installation steps, thus eliminating both installation complexity and kinking risks.
Solution Approach 2:
The molten metal acts as an intermediary that secures the plastic liner in position. As the metal is poured and then solidifies, it naturally conforms to and secures the liner against the mold walls, providing automatic positioning and securing without requiring additional fastening mechanisms or complex installation procedures.
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 solution provides a faucet spout with a secure, kink-free plastic liner integration, enhancing the durability and functionality of the faucet components by maintaining the plastic's integrity during the metal casting process, resulting in a tight and reliable fit.
Implementation Method 1
The temperature of the metal mold for the metal is low enough that the plastic does not melt when the molten metal is introduced into the mold
Implementation Method 2
The housing is made by pouring molten metal in the mold
Data Source
AI summary
A faucet spout or other component has a metal housing with a plastic liner in an opening in the housing. The faucet component is made by first molding a plastic insert having an elongated body and an opening extending through the elongated body from a first end to a second end. The plastic insert is secured inside of a metal mold. The metal mold is heated (or cooled) to a temperature below the melting temperature of the molded plastic and molten metal is poured in the mold. The molded melting temperature of the plastic is high enough and the metal mold temperature is low enough so that the insert does not melt during the metal molding process.