Pipe Boot Flange Molding to Eliminate Weld-Line Seal Failures
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Solution Overview
Problem
Pipe boots made from materials like neoprene degrade quickly when exposed to sunlight and exterior conditions, leading to compromised watertight seals within 2 to 3 years.
Innovation Solution
Manufacturing pipe boot flanges using a thermoplastic elastomer material and a single diaphragm gate injection molding process to eliminate weld lines, ensuring uniform resin distribution and enhanced UV resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pipe boot flanges are made from traditional materials like neoprene, then they provide initial sealing capability, but they degrade quickly when exposed to UV light and exterior conditions, compromising the watertight seal within 2 to 3 years
Solution Approach 1:
The patent changes the material parameters by transitioning from traditional neoprene to thermoplastic elastomer compounds with enhanced UV resistance and durability. This material parameter change allows the flange to maintain seal integrity and structural properties for 6 to 7 years or more under exterior conditions, directly resolving the contradiction between initial sealing capability and long-term service life.
Solution Approach 2:
The patent employs composite material construction by combining thermoplastic elastomer with reinforcing fibers or fillers to create a flange that exhibits both flexibility for sealing and enhanced resistance to UV degradation. This composite approach enables the material to simultaneously achieve reliable sealing performance and extended service life in harsh exterior environments.
2Productivity
If pipe boot flanges are manufactured using multi-gate injection molding, then production efficiency is improved, but vertical weld lines are formed in the molded body, creating failure points that compromise seal reliability
Solution Approach 1:
The patent applies segmentation by dividing the mold cavity into multiple sections that are filled sequentially through a single gate, rather than simultaneously through multiple gates. This segmented filling approach eliminates weld lines while maintaining production efficiency, as the resin flows through distinct paths that do not converge to form weak junctions in the final molded flange.
Solution Approach 2:
The patent resolves the weld line issue by changing the dimensional approach to mold filling. Instead of using multiple gates that create convergence points in three-dimensional space, the single gate system uses controlled flow paths that fill the cavity in a manner that avoids creating vertical weld lines, thereby eliminating failure points while preserving manufacturing efficiency.
3Duration of action of stationary object
If pipe boot flanges are made from materials with high UV resistance, then durability and service life are extended to 6 to 7 years, but the material selection and manufacturing complexity increase
Solution Approach 1:
The patent modifies material parameters by selecting thermoplastic elastomers with inherently high UV resistance and durability characteristics. This parameter change enables the flange to achieve 6 to 7 years of service life without requiring complex multi-layer constructions or additional protective coatings, thereby extending service life while managing material complexity through careful selection of base material properties.
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 durable seal that resists UV light and moisture, maintaining integrity for 6 to 7 years without significant degradation, reducing failure points and ensuring long-term watertight performance.
Implementation Method 1
enhanced UV resistance
Implementation Method 2
injection molding process
Implementation Method 3
resists UV light and moisture
Data Source
AI summary
In some embodiments, a pipe boot flange may include one or more fitting portions. The pipe boot flange may include one diaphragm gate. In some embodiments, a method may include injecting a flow of a resin through a runner and into a diaphragm gate of a mold cavity for a pipe boot flange. The method may include directing the resin through the mold cavity. The method may include forming the pipe boot flange. The method may include removing the formed pipe boot flange from the mold cavity.